These are needed by both guest and host.
Originally-from: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
Signed-off-by: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/1376058122-8248-13-git-send-email-raghavendra.kt@linux.vnet.ibm.com
Acked-by: Gleb Natapov <gleb@redhat.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
If interrupts were enabled when taking the spinlock, we can leave them
enabled while blocking to get the lock.
If we can enable interrupts while waiting for the lock to become
available, and we take an interrupt before entering the poll,
and the handler takes a spinlock which ends up going into
the slow state (invalidating the per-cpu "lock" and "want" values),
then when the interrupt handler returns the event channel will
remain pending so the poll will return immediately, causing it to
return out to the main spinlock loop.
Signed-off-by: Jeremy Fitzhardinge <jeremy@goop.org>
Link: http://lkml.kernel.org/r/1376058122-8248-12-git-send-email-raghavendra.kt@linux.vnet.ibm.com
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Maintain a flag in the LSB of the ticket lock tail which indicates
whether anyone is in the lock slowpath and may need kicking when
the current holder unlocks. The flags are set when the first locker
enters the slowpath, and cleared when unlocking to an empty queue (ie,
no contention).
In the specific implementation of lock_spinning(), make sure to set
the slowpath flags on the lock just before blocking. We must do
this before the last-chance pickup test to prevent a deadlock
with the unlocker:
Unlocker Locker
test for lock pickup
-> fail
unlock
test slowpath
-> false
set slowpath flags
block
Whereas this works in any ordering:
Unlocker Locker
set slowpath flags
test for lock pickup
-> fail
block
unlock
test slowpath
-> true, kick
If the unlocker finds that the lock has the slowpath flag set but it is
actually uncontended (ie, head == tail, so nobody is waiting), then it
clears the slowpath flag.
The unlock code uses a locked add to update the head counter. This also
acts as a full memory barrier so that its safe to subsequently
read back the slowflag state, knowing that the updated lock is visible
to the other CPUs. If it were an unlocked add, then the flag read may
just be forwarded from the store buffer before it was visible to the other
CPUs, which could result in a deadlock.
Unfortunately this means we need to do a locked instruction when
unlocking with PV ticketlocks. However, if PV ticketlocks are not
enabled, then the old non-locked "add" is the only unlocking code.
Note: this code relies on gcc making sure that unlikely() code is out of
line of the fastpath, which only happens when OPTIMIZE_SIZE=n. If it
doesn't the generated code isn't too bad, but its definitely suboptimal.
Thanks to Srivatsa Vaddagiri for providing a bugfix to the original
version of this change, which has been folded in.
Thanks to Stephan Diestelhorst for commenting on some code which relied
on an inaccurate reading of the x86 memory ordering rules.
Signed-off-by: Jeremy Fitzhardinge <jeremy@goop.org>
Link: http://lkml.kernel.org/r/1376058122-8248-11-git-send-email-raghavendra.kt@linux.vnet.ibm.com
Signed-off-by: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Stephan Diestelhorst <stephan.diestelhorst@amd.com>
Signed-off-by: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Increment ticket head/tails by 2 rather than 1 to leave the LSB free
to store a "is in slowpath state" bit. This halves the number
of possible CPUs for a given ticket size, but this shouldn't matter
in practice - kernels built for 32k+ CPU systems are probably
specially built for the hardware rather than a generic distro
kernel.
Signed-off-by: Jeremy Fitzhardinge <jeremy@goop.org>
Link: http://lkml.kernel.org/r/1376058122-8248-9-git-send-email-raghavendra.kt@linux.vnet.ibm.com
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Tested-by: Attilio Rao <attilio.rao@citrix.com>
Signed-off-by: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Although the lock_spinning calls in the spinlock code are on the
uncommon path, their presence can cause the compiler to generate many
more register save/restores in the function pre/postamble, which is in
the fast path. To avoid this, convert it to using the pvops callee-save
calling convention, which defers all the save/restores until the actual
function is called, keeping the fastpath clean.
Signed-off-by: Jeremy Fitzhardinge <jeremy@goop.org>
Link: http://lkml.kernel.org/r/1376058122-8248-8-git-send-email-raghavendra.kt@linux.vnet.ibm.com
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Tested-by: Attilio Rao <attilio.rao@citrix.com>
Signed-off-by: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy@goop.org>
Link: http://lkml.kernel.org/r/1376058122-8248-7-git-send-email-raghavendra.kt@linux.vnet.ibm.com
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Replace the old Xen implementation of PV spinlocks with and implementation
of xen_lock_spinning and xen_unlock_kick.
xen_lock_spinning simply registers the cpu in its entry in lock_waiting,
adds itself to the waiting_cpus set, and blocks on an event channel
until the channel becomes pending.
xen_unlock_kick searches the cpus in waiting_cpus looking for the one
which next wants this lock with the next ticket, if any. If found,
it kicks it by making its event channel pending, which wakes it up.
We need to make sure interrupts are disabled while we're relying on the
contents of the per-cpu lock_waiting values, otherwise an interrupt
handler could come in, try to take some other lock, block, and overwrite
our values.
Signed-off-by: Jeremy Fitzhardinge <jeremy@goop.org>
Link: http://lkml.kernel.org/r/1376058122-8248-6-git-send-email-raghavendra.kt@linux.vnet.ibm.com
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
[ Raghavendra: use function + enum instead of macro, cmpxchg for zero status reset
Reintroduce break since we know the exact vCPU to send IPI as suggested by Konrad.]
Signed-off-by: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
There's no need to do it at very early init, and doing it there
makes it impossible to use the jump_label machinery.
Signed-off-by: Jeremy Fitzhardinge <jeremy@goop.org>
Link: http://lkml.kernel.org/r/1376058122-8248-5-git-send-email-raghavendra.kt@linux.vnet.ibm.com
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Now that the paravirtualization layer doesn't exist at the spinlock
level any more, we can collapse the __ticket_ functions into the arch_
functions.
Signed-off-by: Jeremy Fitzhardinge <jeremy@goop.org>
Link: http://lkml.kernel.org/r/1376058122-8248-4-git-send-email-raghavendra.kt@linux.vnet.ibm.com
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Tested-by: Attilio Rao <attilio.rao@citrix.com>
Signed-off-by: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
The code size expands somewhat, and its better to just call
a function rather than inline it.
Thanks Jeremy for original version of ARCH_NOINLINE_SPIN_UNLOCK config patch,
which is simplified.
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/1376058122-8248-3-git-send-email-raghavendra.kt@linux.vnet.ibm.com
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Rather than outright replacing the entire spinlock implementation in
order to paravirtualize it, keep the ticket lock implementation but add
a couple of pvops hooks on the slow patch (long spin on lock, unlocking
a contended lock).
Ticket locks have a number of nice properties, but they also have some
surprising behaviours in virtual environments. They enforce a strict
FIFO ordering on cpus trying to take a lock; however, if the hypervisor
scheduler does not schedule the cpus in the correct order, the system can
waste a huge amount of time spinning until the next cpu can take the lock.
(See Thomas Friebel's talk "Prevent Guests from Spinning Around"
http://www.xen.org/files/xensummitboston08/LHP.pdf for more details.)
To address this, we add two hooks:
- __ticket_spin_lock which is called after the cpu has been
spinning on the lock for a significant number of iterations but has
failed to take the lock (presumably because the cpu holding the lock
has been descheduled). The lock_spinning pvop is expected to block
the cpu until it has been kicked by the current lock holder.
- __ticket_spin_unlock, which on releasing a contended lock
(there are more cpus with tail tickets), it looks to see if the next
cpu is blocked and wakes it if so.
When compiled with CONFIG_PARAVIRT_SPINLOCKS disabled, a set of stub
functions causes all the extra code to go away.
Results:
=======
setup: 32 core machine with 32 vcpu KVM guest (HT off) with 8GB RAM
base = 3.11-rc
patched = base + pvspinlock V12
+-----------------+----------------+--------+
dbench (Throughput in MB/sec. Higher is better)
+-----------------+----------------+--------+
| base (stdev %)|patched(stdev%) | %gain |
+-----------------+----------------+--------+
| 15035.3 (0.3) |15150.0 (0.6) | 0.8 |
| 1470.0 (2.2) | 1713.7 (1.9) | 16.6 |
| 848.6 (4.3) | 967.8 (4.3) | 14.0 |
| 652.9 (3.5) | 685.3 (3.7) | 5.0 |
+-----------------+----------------+--------+
pvspinlock shows benefits for overcommit ratio > 1 for PLE enabled cases,
and undercommits results are flat
Signed-off-by: Jeremy Fitzhardinge <jeremy@goop.org>
Link: http://lkml.kernel.org/r/1376058122-8248-2-git-send-email-raghavendra.kt@linux.vnet.ibm.com
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Tested-by: Attilio Rao <attilio.rao@citrix.com>
[ Raghavendra: Changed SPIN_THRESHOLD, fixed redefinition of arch_spinlock_t]
Signed-off-by: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This driver is currently used by musb' cppi41 couter part. I may merge
both dma engine user of musb at some point but not just yet.
The driver seems to work in RX/TX mode in host mode, tested on mass
storage. I increaed the size of the TX / RX transfers and waited for the
core code to cancel a transfers and it seems to recover.
v2..3:
- use mall transfers on RX side and check data toggle.
- use rndis mode on tx side so we haveon interrupt for 4096 transfers.
- remove custom "transferred" hack and use dmaengine_tx_status() to
compute the total amount of data that has been transferred.
- cancel transfers and reclaim descriptors
v1..v2:
- RX path added
- dma mode 0 & 1 is working
- device tree nodes re-created.
Cc: Vinod Koul <vinod.koul@intel.com>
Cc: Dan Williams <djbw@fb.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This moves the two instances from the big node into two child nodes. The
glue layer ontop does almost nothing.
There is one devices containing the control module for USB (2) phy,
(2) usb and later the dma engine. The usb device is the "glue device"
which contains the musb device as a child. This is what we do ever since.
The new file musb_am335x is just here to prob the new bus and populate
child devices.
There are a lot of changes to the dsps file as a result of the changes:
- musb_core_offset
This is gone. The device tree provides memory ressources information
for the device there is no need to "fix" things
- instances
This is gone as well. If we have two instances then we have have two
child enabled nodes in the device tree. For instance the SoC in beagle
bone has two USB instances but only one has been wired up so there is
no need to load and init the second instance since it won't be used.
- dsps_glue is now per glue device
In the past there was one of this structs but with an array of two and
each instance accessed its variable depending on the platform device
id.
- no unneeded copy of structs
I do not know why struct dsps_musb_wrapper is copied but it is not
necessary. The same goes for musb_hdrc_platform_data which allocated
on demand and then again by platform_device_add_data(). One copy is
enough.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
The "nop" driver isn't a do-nothing-stub but supports a couple functions
like clock on/off or is able to use a voltage regulator. This patch
simply renames the driver to "generic" since it is easy possible to
extend it by a simple function istead of writing a complete driver.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
'target' will be set to '-1' in kvm_arch_vcpu_init(), and it need check
'target' whether less than zero or not in kvm_vcpu_initialized().
So need define target as 'int' instead of 'u32', just like ARM has done.
The related warning:
arch/arm64/kvm/../../../arch/arm/kvm/arm.c:497:2: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits]
Signed-off-by: Chen Gang <gang.chen@asianux.com>
[Marc: reformated the Subject line to fit the series]
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
When performing a Stage-2 TLB invalidation, it is necessary to
make sure the write to the page tables is observable by all CPUs.
For this purpose, add dsb instructions to __kvm_tlb_flush_vmid_ipa
and __kvm_flush_vm_context before doing the TLB invalidation itself.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Not saving PAR_EL1 is an unfortunate oversight. If the guest
performs an AT* operation and gets scheduled out before reading
the result of the translation from PAREL1, it could become
corrupted by another guest or the host.
Saving this register is made slightly more complicated as KVM also
uses it on the permission fault handling path, leading to an ugly
"stash and restore" sequence. Fortunately, this is already a slow
path so we don't really care. Also, Linux doesn't do any AT*
operation, so Linux guests are not impacted by this bug.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
If a transaction is rolled back, the Target Address Register (TAR), Processor
Priority Register (PPR) and Data Stream Control Register (DSCR) should be
restored to the checkpointed values before the transaction began. Any changes
to these SPRs inside the transaction should not be visible in the abort
handler.
Currently Linux doesn't save or restore the checkpointed TAR, PPR or DSCR. If
we preempt a processes inside a transaction which has modified any of these, on
process restore, that same transaction may be aborted we but we won't see the
checkpointed versions of these SPRs.
This adds checkpointed versions of these SPRs to the thread_struct and adds the
save/restore of these three SPRs to the treclaim/trechkpt code.
Without this if any of these SPRs are modified during a transaction, users may
incorrectly see a speculated SPR value even if the transaction is aborted.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Cc: <stable@vger.kernel.org> [v3.10]
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This moves us to save the Target Address Register (TAR) a earlier in
__switch_to. It introduces a new function save_tar() to do this.
We need to save the TAR earlier as we will overwrite it in the transactional
memory reclaim/recheckpoint path. We are going to do this in a subsequent
patch which will fix saving the TAR register when it's modified inside a
transaction.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Cc: <stable@vger.kernel.org> [v3.10]
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
POWER8 allows the DSCR to be accessed directly from userspace via a new SPR
number 0x3 (Rather than 0x11. DSCR SPR number 0x11 is still used on POWER8 but
like POWER7, is only accessible in HV and OS modes). Currently, we allow this
by setting H/FSCR DSCR bit on boot.
Unfortunately this doesn't work, as the kernel needs to see the DSCR change so
that it knows to no longer restore the system wide version of DSCR on context
switch (ie. to set thread.dscr_inherit).
This clears the H/FSCR DSCR bit initially. If a process then accesses the DSCR
(via SPR 0x3), it'll trap into the kernel where we set thread.dscr_inherit in
facility_unavailable_exception().
We also change _switch() so that we set or clear the H/FSCR DSCR bit based on
the thread.dscr_inherit.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Cc: <stable@vger.kernel.org> [v3.10]
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This reworks the Facility Status and Control Regsiter (FSCR) config bit
definitions so that we can access the bit numbers. This is needed for a
subsequent patch to fix the userspace DSCR handling.
HFSCR and FSCR bit definitions are the same, so reuse them.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Cc: <stable@vger.kernel.org> [v3.10]
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Currently if we take hypervisor facility unavaliable (from 0xf80/0x4f80) we
mark it as an OS facility unavaliable (0xf60) as the two share the same code
path.
The becomes a problem in facility_unavailable_exception() as we aren't able to
see the hypervisor facility unavailable exceptions.
Below fixes this by duplication the required macros.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Cc: <stable@vger.kernel.org> [v3.10]
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
err was overwritten by a previous function call, and checked to be 0. If
the following page allocation fails, 0 is going to be returned instead
of -ENOMEM.
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
'rmls' is 'unsigned long', lpcr_rmls() will return negative number when
failure occurs, so it need a type cast for comparing.
'lpid' is 'unsigned long', kvmppc_alloc_lpid() return negative number
when failure occurs, so it need a type cast for comparing.
Signed-off-by: Chen Gang <gang.chen@asianux.com>
Acked-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
The procfs entry for global statistics has been missed on PowerNV
platform and the patch is going to add that.
Signed-off-by: Mike Qiu <qiudayu@linux.vnet.ibm.com>
Acked-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Older kernels has just length information in their header. Handle it
while reading old kernel oops log from pstore.
Applies on top of powerpc/pseries: Fix buffer overflow when reading from pstore
Signed-off-by: Aruna Balakrishnaiah <aruna@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
When reading from pstore there is a buffer overflow during decompression
due to the header added in unzip_oops. Remove unzip_oops and call
pstore_decompress directly in nvram_pstore_read. Allocate buffer of size
report_length of the oops header as header will not be deallocated in pstore.
Since we have 'openssl' command line tool to decompress the compressed data,
dump the compressed data in case decompression fails instead of not dumping
anything.
Signed-off-by: Aruna Balakrishnaiah <aruna@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
We want PPC_DENORMALISATION enabled when POWERNV is enabled,
so update the Kconfig.
Signed-off-by: Anton Blanchard <anton@samba.org>
Acked-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: <stable@vger.kernel.org>
there is an additional "{", which causes building error.
Signed-off-by: Cong Ding <dinggnu@gmail.com>
Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Aaro Koskinen reports the following oops:
Installing fiq handler from c001b110, length 0x164
Unable to handle kernel paging request at virtual address ffff1224
pgd = c0004000
[ffff1224] *pgd=00000000, *pte=11fff0cb, *ppte=11fff00a
...
[<c0013154>] (set_fiq_handler+0x0/0x6c) from [<c0365d38>] (ams_delta_init_fiq+0xa8/0x160)
r6:00000164 r5:c001b110 r4:00000000 r3:fefecb4c
[<c0365c90>] (ams_delta_init_fiq+0x0/0x160) from [<c0365b14>] (ams_delta_init+0xd4/0x114)
r6:00000000 r5:fffece10 r4:c037a9e0
[<c0365a40>] (ams_delta_init+0x0/0x114) from [<c03613b4>] (customize_machine+0x24/0x30)
This is because the vectors page is now write-protected, and to change
code in there we must write to its original alias. Make that change,
and adjust the cache flushing such that the code will become visible
to the instruction stream on VIVT CPUs.
Reported-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Tested-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Moves the relocation handling into C, after decompression. This requires
that the decompressed size is passed to the decompression routine as
well so that relocations can be found. Only kernels that need relocation
support will use the code (currently just x86_32), but this is laying
the ground work for 64-bit using it in support of KASLR.
Based on work by Neill Clift and Michael Davidson.
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: http://lkml.kernel.org/r/20130708161517.GA4832@www.outflux.net
Acked-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
When using 64kB pages, we only have two levels of page tables,
meaning that PGD, PUD and PMD are fused. In this case, trying
to refcount PUDs and PMDs independently is a a complete disaster,
as they are the same.
We manage to get it right for the allocation (stage2_set_pte uses
{pmd,pud}_none), but the unmapping path clears both pud and pmd
refcounts, which fails spectacularly with 2-level page tables.
The fix is to avoid calling clear_pud_entry when both the pmd and
pud pages are empty. For this, and instead of introducing another
pud_empty function, consolidate both pte_empty and pmd_empty into
page_empty (the code is actually identical) and use that to also
test the validity of the pud.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
The unmap_range function did not properly cover the case when the start
address was not aligned to PMD_SIZE or PUD_SIZE and an entire pte table
or pmd table was cleared, causing us to leak memory when incrementing
the addr.
The fix is to always move onto the next page table entry boundary
instead of adding the full size of the VA range covered by the
corresponding table level entry.
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
* pm-cpufreq:
cpufreq: Remove unused function __cpufreq_driver_getavg()
cpufreq: Remove unused APERF/MPERF support
cpufreq: ondemand: Change the calculation of target frequency
Fix yet another build failure caused by a weird set of configuration
settings:
LD init/built-in.o
arch/arm/kernel/built-in.o: In function `__dabt_usr':
/home/tom3q/kernel/arch/arm/kernel/entry-armv.S:377: undefined reference to `kuser_cmpxchg64_fixup'
arch/arm/kernel/built-in.o: In function `__irq_usr':
/home/tom3q/kernel/arch/arm/kernel/entry-armv.S:387: undefined reference to `kuser_cmpxchg64_fixup'
caused by:
CONFIG_KUSER_HELPERS=n
CONFIG_CPU_32v6K=n
CONFIG_NEEDS_SYSCALL_FOR_CMPXCHG=n
Reported-by: Tomasz Figa <tomasz.figa@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
- Make all the external assembler template symbols __visible
- Move the templates inline assembler code into a top level
assembler statement, not inside a function. This avoids it being
optimized away or cloned.
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/1375740170-7446-8-git-send-email-andi@firstfloor.org
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
FWIW I suspect sys_rt_sigreturn/sys_sigreturn should use
standard SYSCALL wrappers. But I didn't do that change in this
patch.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/1375740170-7446-7-git-send-email-andi@firstfloor.org
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
These handlers are all referenced from assembler stubs, so need
to be visible.
The handlers without arguments become asmlinkage, the others __visible
to not force regparms(0) on x86-32.
I put it all into a single patch, please let me know if you want
it it split up.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/1375740170-7446-4-git-send-email-andi@firstfloor.org
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Mark 32bit dotraplinkage functions as __visible for LTO.
64bit already is using asmlinkage which includes it.
v2: Clean up (M.Marek)
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/1375740170-7446-3-git-send-email-andi@firstfloor.org
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Make the sys_call_table type defined in asm/syscall.h match
the definition in syscall_64.c
v2: include asm/syscall.h in syscall_64.c too. I left uml alone
because it doesn't have an syscall.h on its own and including
the native one leads to other errors.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/1375740170-7446-2-git-send-email-andi@firstfloor.org
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: Richard Weinberger <richard@nod.at>
Pull misc x86 fixes from Peter Anvin.
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86, amd, microcode: Fix error path in apply_microcode_amd()
x86, fpu: correct the asm constraints for fxsave, unbreak mxcsr.daz
x86, efi: correct call to free_pages
x86/iommu/vt-d: Expand interrupt remapping quirk to cover x58 chipset
Pull MIPS fixes from Ralf Baechle:
"Two platform-specific fixes plus a fix for oprofile which was calling
smp_processor_id() in preemptible code"
* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
MIPS: BMIPS: fix hardware interrupt routing for boot CPU != 0
MIPS: oprofile: Fix BUG due to smp_processor_id() in preemptible code.
MIPS: PNX833x: PNX8335_PCI_ETHERNET_INT depends on CONFIG_SOC_PNX8335
Pull s390 fixes from Martin Schwidefsky:
"Enable LZ4 compression for the kernel image, add the machine id for
the new zBC12 model, fix an issue with hanging dasd devices, correct a
Kconfig dependency, fix a compile error in the perf module with
CONFIG_KVM=n and fix the find_next_bit_left primitive for the PCI base
layer"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390/dasd: fix hanging devices after path events
s390/perf: fix compile error (undefined reference sie_exit)
s390/bitops: fix find_next_bit_left
s390: add support for IBM zBC12 machine
s390/Kconfig: select 'TTY' when 'S390_GUEST' is enabled
s390: add support for LZ4-compressed kernel
The PAR was exported as CRn == 7 and CRm == 0, but in fact the primary
coprocessor register number was determined by CRm for 64-bit coprocessor
registers as the user space API was modeled after the coprocessor
access instructions (see the ARM ARM rev. C - B3-1445).
However, just changing the CRn to CRm breaks the sorting check when
booting the kernel, because the internal kernel logic always treats CRn
as the primary register number, and it makes the table sorting
impossible to understand for humans.
Alternatively we could change the logic to always have CRn == CRm, but
that becomes unclear in the number of ways we do look up of a coprocessor
register. We could also have a separate 64-bit table but that feels
somewhat over-engineered. Instead, keep CRn the primary representation
of the primary coproc. register number in-kernel and always export the
primary number as CRm as per the existing user space ABI.
Note: The TTBR registers just magically worked because they happened to
follow the CRn(0) regs and were considered CRn(0) in the in-kernel
representation.
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Add TSX-NI related instructions and new instructions to
x86-opcode-map.txt according to the Intel(R) 64 and IA-32
Architectures Software Developer's Manual Vol2C (June, 2013).
This also includes below updates.
- Fix a typo of MWAIT (the lack of (11B)).
- Change NOP Ev to prefetchw Ev
- Add CRC32 new prefix style (66&F2)
- Add ADCX, ADOX, RDSEED, CLAC and STAC instructions
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Link: http://lkml.kernel.org/r/20130806073750.4049.12365.stgit@udc4-manage.rcp.hitachi.co.jp
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
The 0x1000 bit of the MCACOD field of machine check MCi_STATUS
registers is only defined for corrected errors (where it means
that hardware may be filtering errors see SDM section 15.9.2.1).
For uncorrected errors it may, or may not be set - so we should mask
it out when checking for the architecturaly defined recoverable
error signatures (see SDM 15.9.3.1 and 15.9.3.2)
Acked-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
We try to handle the hypervisor compatibility mode by detecting hypervisor
through a specific order. This is not robust, since hypervisors may implement
each others features.
This patch tries to handle this situation by always choosing the last one in the
CPUID leaves. This is done by letting .detect() return a priority instead of
true/false and just re-using the CPUID leaf where the signature were found as
the priority (or 1 if it was found by DMI). Then we can just pick hypervisor who
has the highest priority. Other sophisticated detection method could also be
implemented on top.
Suggested by H. Peter Anvin and Paolo Bonzini.
Acked-by: K. Y. Srinivasan <kys@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Doug Covelli <dcovelli@vmware.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Dan Hecht <dhecht@vmware.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Gleb Natapov <gleb@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Link: http://lkml.kernel.org/r/1374742475-2485-4-git-send-email-jasowang@redhat.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Switch to use hypervisor_cpuid_base() to detect KVM.
Cc: Gleb Natapov <gleb@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Link: http://lkml.kernel.org/r/1374742475-2485-3-git-send-email-jasowang@redhat.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Switch to use hypervisor_cpuid_base() to detect Xen.
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Link: http://lkml.kernel.org/r/1374742475-2485-2-git-send-email-jasowang@redhat.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This patch introduce hypervisor_cpuid_base() which loop test the hypervisor
existence function until the signature match and check the number of leaves if
required. This could be used by Xen/KVM guest to detect the existence of
hypervisor.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Link: http://lkml.kernel.org/r/1374742475-2485-1-git-send-email-jasowang@redhat.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
The hardware interrupt routing for boot CPU != 0 is wrong because it
will route all the hardware interrupts to TP0 which is not the one we
booted from. Fix this by properly checking which boot CPU we are booting
from and updating the right interrupt mask for the boot CPU. This fixes
booting on BCM3368 with bmips_smp_emabled = 0.
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Cc: linux-mips@linux-mips.org
Cc: blogic@openwrt.org
Cc: jogo@openwrt.org
Cc: cernekee@gmail.com
Patchwork: https://patchwork.linux-mips.org/patch/5650/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
The PNX8335_PCI_ETHERNET_INT macro is defined in
arch/mips/include/asm/mach-pnx833x/irq-mapping.h
only if CONFIG_SOC_PNX8335 is selected.
Fixes the following randconfig problem:
arch/mips/pnx833x/common/platform.c:210:12:
error: 'PNX8335_PIC_ETHERNET_INT' undeclared here
(not in a function)
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Acked-by: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5585/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
When CONFIG_PREEMPT is enabled, Linux will not be able to boot and warn:
[ 4.127825] ------------[ cut here ]------------
[ 4.133376] WARNING: at init/main.c:699 do_one_initcall+0x150/0x158()
[ 4.140738] initcall xen_init_events+0x0/0x10c returned with preemption imbalance
This is because xen_percpu_init uses get_cpu but doesn't have the corresponding
put_cpu.
Signed-off-by: Julien Grall <julien.grall@linaro.org>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
John McCalpin reports that the "drs_data" and "ncb_data" QPI
uncore events are missing the "extra bit" and always return zero
values unless the bit is properly set.
More details from him:
According to the Xeon E5-2600 Product Family Uncore Performance
Monitoring Guide, Table 2-94, about 1/2 of the QPI Link Layer events
(including the ones that "perf" calls "drs_data" and "ncb_data") require
that the "extra bit" be set.
This was confusing for a while -- a note at the bottom of page 94 says
that the "extra bit" is bit 16 of the control register.
Unfortunately, Table 2-86 clearly says that bit 16 is reserved and must
be zero. Looking around a bit, I found that bit 21 appears to be the
correct "extra bit", and further investigation shows that "perf" actually
agrees with me:
[root@c560-003.stampede]# cat /sys/bus/event_source/devices/uncore_qpi_0/format/event
config:0-7,21
So the command
# perf -e "uncore_qpi_0/event=drs_data/"
Is the same as
# perf -e "uncore_qpi_0/event=0x02,umask=0x08/"
While it should be
# perf -e "uncore_qpi_0/event=0x102,umask=0x08/"
I confirmed that this last version gives results that agree with the
amount of data that I expected the STREAM benchmark to move across the QPI
link in the second (cross-chip) test of the original script.
Reported-by: John McCalpin <mccalpin@tacc.utexas.edu>
Signed-off-by: Vince Weaver <vincent.weaver@maine.edu>
Cc: zheng.z.yan@intel.com
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: Paul Mackerras <paulus@samba.org>
Cc: <stable@kernel.org>
Link: http://lkml.kernel.org/r/alpine.DEB.2.10.1308021037280.26119@vincent-weaver-1.um.maine.edu
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Add the RTS/CTS property for auart0 which means we enable the
DMA support for it.
Signed-off-by: Huang Shijie <b32955@freescale.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This was missed when splitting out the phy from the controller node in
commit 9dffe3be3f (ARM: tegra: modify ULPI reset GPIO properties).
Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
This patch removes sti_secondary_start from _INIT section, there are 2
reason for this removal.
1. discarding such a small code does not save much, given the RAM
sizes.
2. Having this code discarded, creates corruption issue when we boot
smp-kernel with nrcpus=1 or with single cpu node in DT.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
This patch fixes cpu nodes with device_type = "cpu". This change was not
necessary before 3.10-rc7.
Without this patch STi SOCs does not boot as SMP.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
* Lager board: do not annotate gpio_buttons as __initdata
- This avoids accessing uninitialised memory if keys are pressed
after kernel initialisation completes.
- Bug introduced in gpio-keys were enabled in v3.11-rc1
* Bock-W board: fix SDHI0 PFC settings
- Allow detection of SD card
- Bug introduced in SDHI support was added in v3.11-rc1
* shdma: fixup sh_dmae_get_partial() calculation error
- Bug introduced in 2.6.34-rc1.
* armadillo800eva board: Don't request GPIO 166 in board code
- Allow use of touchscreen
- Bug introduced in v3.11-rc1
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Merge tag 'renesas-fixes2-for-v3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas into fixes
From Simon Horman:
Second round of Renesas ARM based SoC fixes for v3.11
* Lager board: do not annotate gpio_buttons as __initdata
- This avoids accessing uninitialised memory if keys are pressed
after kernel initialisation completes.
- Bug introduced in gpio-keys were enabled in v3.11-rc1
* Bock-W board: fix SDHI0 PFC settings
- Allow detection of SD card
- Bug introduced in SDHI support was added in v3.11-rc1
* shdma: fixup sh_dmae_get_partial() calculation error
- Bug introduced in 2.6.34-rc1.
* armadillo800eva board: Don't request GPIO 166 in board code
- Allow use of touchscreen
- Bug introduced in v3.11-rc1
* tag 'renesas-fixes2-for-v3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
ARM: shmobile: lager: do not annotate gpio_buttons as __initdata
ARM: shmobile: BOCK-W: fix SDHI0 PFC settings
shdma: fixup sh_dmae_get_partial() calculation error
ARM: shmobile: armadillo800eva: Don't request GPIO 166 in board code
Signed-off-by: Olof Johansson <olof@lixom.net>
regression and an AM33xx cpgmac power management regression.
Basic build, boot, and PM tests are available here:
http://www.pwsan.com/omap/testlogs/hwmod_fixes_a_v3.11-rc/20130730042132/
The tests include temporary fixes for the unrelated 2430SDP and OMAP3
boot regressions, which are not part of this signed tag.
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Merge tag 'for-v3.11-rc/omap-fixes-b' of git://git.kernel.org/pub/scm/linux/kernel/git/pjw/omap-pending into fixes
From Paul Walmsley via Tony Lindgren:
Some OMAP hwmod fixes for v3.11-rc. Mostly intended to fix an earlyprintk
regression and an AM33xx cpgmac power management regression.
Basic build, boot, and PM tests are available here:
http://www.pwsan.com/omap/testlogs/hwmod_fixes_a_v3.11-rc/20130730042132/
The tests include temporary fixes for the unrelated 2430SDP and OMAP3
boot regressions, which are not part of this signed tag.
* tag 'for-v3.11-rc/omap-fixes-b' of git://git.kernel.org/pub/scm/linux/kernel/git/pjw/omap-pending:
ARM: OMAP2+: hwmod: AM335x: fix cpgmac address space
ARM: OMAP2+: hwmod: rt address space index for DT
ARM: OMAP2+: Sync hwmod state with the pm_runtime and omap_device state
ARM: OMAP2+: Avoid idling memory controllers with no drivers
ARM: OMAP2+: hwmod: Fix a crash in _setup_reset() with DEBUG_LL
Signed-off-by: Olof Johansson <olof@lixom.net>
Due to wrong older revision of documentation used as reference, we
seem to have a bunch of LDOs wrongly configured on OMAP5 uEVM. This
series is based power tree on production board 750-2628-XXX platform.
Unfortunately, the wrong voltages may be detrimental to OMAP5 as they
supply hardware blocks at voltages that are out of specification.
There is a chance that without these fixes there can be hardware
damage to omap5-uevm boards with the v3.11-rc series.
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Merge tag 'omap-for-v3.11/fixes-omap5' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into fixes
From Tony Lindgren:
Fixes for omap5-uevm regulators from Nishanth Menon <nm@ti.com>:
Due to wrong older revision of documentation used as reference, we
seem to have a bunch of LDOs wrongly configured on OMAP5 uEVM. This
series is based power tree on production board 750-2628-XXX platform.
Unfortunately, the wrong voltages may be detrimental to OMAP5 as they
supply hardware blocks at voltages that are out of specification.
There is a chance that without these fixes there can be hardware
damage to omap5-uevm boards with the v3.11-rc series.
* tag 'omap-for-v3.11/fixes-omap5' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
ARM: dts: omap5-uevm: update optional/unused regulator configurations
ARM: dts: omap5-uevm: fix regulator configurations mandatory for SoC
ARM: dts: omap5-uevm: document regulator signals used on the actual board
Signed-off-by: Olof Johansson <olof@lixom.net>
Two small fixes for MSM.
The first fixes the a gpio controller register address. I didn't see
any acks from the devicetree maintainers, so I've copied them on this
pull request. The change itself is minor, and just to the register
address.
The second change removes the gpiomux V1 code from MSM. This was
breaking compilation for some of the targets.
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Merge tag 'msm-3.11-fix1' of git://git.kernel.org/pub/scm/linux/kernel/git/davidb/linux-msm into fixes
From David Brown, fixes for MSM for 3.11:
Two small fixes for MSM.
The first fixes the a gpio controller register address. I didn't see
any acks from the devicetree maintainers, so I've copied them on this
pull request. The change itself is minor, and just to the register
address.
The second change removes the gpiomux V1 code from MSM. This was
breaking compilation for some of the targets.
* tag 'msm-3.11-fix1' of git://git.kernel.org/pub/scm/linux/kernel/git/davidb/linux-msm:
ARM: msm: Consolidate gpiomux for older architectures
ARM: msm: dts: Fix the gpio register address for msm8960
Signed-off-by: Olof Johansson <olof@lixom.net>
Pull arm fixes fixes from Russell King:
"This fixes a couple of problems with commit 48be69a026 ("ARM: move
signal handlers into a vdso-like page"), one of which was originally
discovered via my testing originally, but the fix for it was never
actually committed.
The other shows up on noMMU builds, and such platforms are extremely
rare and as such are not part of my nightly testing"
* 'fixes' of git://git.linaro.org/people/rmk/linux-arm:
ARM: fix nommu builds with 48be69a02 (ARM: move signal handlers into a vdso-like page)
ARM: fix a cockup in 48be69a02 (ARM: move signal handlers into a vdso-like page)
Olof reports that noMMU builds error out with:
arch/arm/kernel/signal.c: In function 'setup_return':
arch/arm/kernel/signal.c:413:25: error: 'mm_context_t' has no member named 'sigpage'
This shows one of the evilnesses of IS_ENABLED(). Get rid of it here
and replace it with #ifdef's - and as no noMMU platform can make use
of sigpage, depend on CONIFG_MMU not CONFIG_ARM_MPU.
Reported-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Unfortunately, I never committed the fix to a nasty oops which can
occur as a result of that commit:
------------[ cut here ]------------
kernel BUG at /home/olof/work/batch/include/linux/mm.h:414!
Internal error: Oops - BUG: 0 [#1] PREEMPT SMP ARM
Modules linked in:
CPU: 0 PID: 490 Comm: killall5 Not tainted 3.11.0-rc3-00288-gabe0308 #53
task: e90acac0 ti: e9be8000 task.ti: e9be8000
PC is at special_mapping_fault+0xa4/0xc4
LR is at __do_fault+0x68/0x48c
This doesn't show up unless you do quite a bit of testing; a simple
boot test does not do this, so all my nightly tests were passing fine.
The reason for this is that install_special_mapping() expects the
page array to stick around, and as this was only inserting one page
which was stored on the kernel stack, that's why this was blowing up.
Reported-by: Olof Johansson <olof@lixom.net>
Tested-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
The EFI FB quirks from efifb.c are useful for simple-framebuffer devices
as well. Apply them by default so we can convert efifb.c to use
efi-framebuffer platform devices.
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Link: http://lkml.kernel.org/r/1375445127-15480-5-git-send-email-dh.herrmann@gmail.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
The current situation regarding boot-framebuffers (VGA, VESA/VBE, EFI) on
x86 causes troubles when loading multiple fbdev drivers. The global
"struct screen_info" does not provide any state-tracking about which
drivers use the FBs. request_mem_region() theoretically works, but
unfortunately vesafb/efifb ignore it due to quirks for broken boards.
Avoid this by creating a platform framebuffer devices with a pointer
to the "struct screen_info" as platform-data. Drivers can now create
platform-drivers and the driver-core will refuse multiple drivers being
active simultaneously.
We keep the screen_info available for backwards-compatibility. Drivers
can be converted in follow-up patches.
Different devices are created for VGA/VESA/EFI FBs to allow multiple
drivers to be loaded on distro kernels. We create:
- "vesa-framebuffer" for VBE/VESA graphics FBs
- "efi-framebuffer" for EFI FBs
- "platform-framebuffer" for everything else
This allows to load vesafb, efifb and others simultaneously and each
picks up only the supported FB types.
Apart from platform-framebuffer devices, this also introduces a
compatibility option for "simple-framebuffer" drivers which recently got
introduced for OF based systems. If CONFIG_X86_SYSFB is selected, we
try to match the screen_info against a simple-framebuffer supported
format. If we succeed, we create a "simple-framebuffer" device instead
of a platform-framebuffer.
This allows to reuse the simplefb.c driver across architectures and also
to introduce a SimpleDRM driver. There is no need to have vesafb.c,
efifb.c, simplefb.c and more just to have architecture specific quirks
in their setup-routines.
Instead, we now move the architecture specific quirks into x86-setup and
provide a generic simple-framebuffer. For backwards-compatibility (if
strange formats are used), we still allow vesafb/efifb to be loaded
simultaneously and pick up all remaining devices.
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Link: http://lkml.kernel.org/r/1375445127-15480-4-git-send-email-dh.herrmann@gmail.com
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Pull powerpc fixes from Ben Herrenschmidt:
"Here is not quite a handful of powerpc fixes for rc3.
The windfarm fix is a regression fix (though not a new one), the PMU
interrupt rename is not a fix per-se but has been submitted a long
time ago and I kept forgetting to put it in (it puts us back in sync
with x86), the other perf bit is just about putting an API/ABI bit
definition in the right place for userspace to consume, and finally,
we have a fix for the VPHN (Virtual Partition Home Node) feature
(notification that the hypervisor is moving nodes around) which could
cause lockups so we may as well fix it now"
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
powerpc/windfarm: Fix noisy slots-fan on Xserve (rm31)
powerpc: VPHN topology change updates all siblings
powerpc/perf: Export PERF_EVENT_CONFIG_EBB_SHIFT to userspace
powerpc: Rename PMU interrupts from CNT to PMI
Pull ARM fixes from Russell King:
"I've thought long and hard about what to say for this pull request,
and I really can't work out anything sane to say to summarise much of
these commits. The problem is, for most of these are, yet again, lots
of small bits scattered around the place without any real overall
theme to them"
Most notable is probably the kuser page helper improvements.
* 'fixes' of git://git.linaro.org/people/rmk/linux-arm: (22 commits)
ARM: Add .text annotations where required after __CPUINIT removal
ARM: 7803/1: Fix deadlock scenario with smp_send_stop()
ARM: make vectors page inaccessible from userspace
ARM: move signal handlers into a vdso-like page
ARM: allow kuser helpers to be removed from the vector page
ARM: update FIQ support for relocation of vectors
ARM: use linker magic for vectors and vector stubs
ARM: move vector stubs
ARM: poison memory between kuser helpers
ARM: poison the vectors page
ARM: 7801/1: v6: prevent gcc 4.5 from reordering extended CP15 reads above is_smp() test
ARM: 7800/1: ARMv7-M: Fix name of NVIC handler function
ARM: Fix sorting of machine- initializers
ARM: 7791/1: a.out: remove partial a.out support
ARM: 7790/1: Fix deferred mm switch on VIVT processors
ARM: 7789/1: Do not run dummy_flush_tlb_a15_erratum() on non-Cortex-A15
ARM: 7787/1: virt: ensure visibility of __boot_cpu_mode
ARM: 7788/1: elf: fix lpae hwcap feature reporting in proc/cpuinfo
ARM: 7786/1: hyp: fix macro parameterisation
ARM: 7785/1: mm: restrict early_alloc to section-aligned memory
...
Pull parisc updates from Helge Deller:
"The majority of lines changed are due the addition of a defconfig for
the C8000 machine. Even the fix in parisc/kernel/cache.c file is
actually ony a 10-line fix, but the change became bigger (and much
nicer) to avoid errors of the checkpatch script.
Here is the short-changelog:
This round of parisc updates includes mostly fixes for the C8000
workstation. We have a new defconfig file for this machine, as well
as fixes for it's serial port, the AGP driver and the cache routines
to cope with the vmas of the FireGL card in a C8000. The sys32.h
header file was not used and as such it's now gone"
* 'parisc-3.11-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
parisc: Fix interrupt routing for C8000 serial ports
parisc: Remove arch/parisc/kernel/sys32.h header
parisc: add defconfig for c8000 machine
parisc: agp/parisc-agp: allow binding of user memory to the AGP GART
parisc: Fix cache routines to ignore vma's with an invalid pfn
Hotplug
PCI: pciehp: Fix null pointer deref when hot-removing SR-IOV device
PCI: hotplug: Convert to be builtin only, not modular
PCI: pciehp: Convert pciehp to be builtin only, not modular
Resource allocation
PCI: Retry allocation of only the resource type that failed
ARM
PCI: mvebu: Disable prefetchable memory support in PCI-to-PCI bridge
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Merge tag 'pci-v3.11-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull PCI fixes from Bjorn Helgaas:
"Yinghai fixed a couple regressions: one resource assignment problem
introduced in v3.10 that showed up with SR-IOV on powerpc, and another
SR-IOV hot-remove issue related to refcounting changes we merged for
v3.11.
Yinghai is still working on another SR-IOV-related fix or two, which
will be simpler if pciehp is non-modular, so I included the Kconfig
changes now to get them in earlier.
Finally, a minor fix for the ARM Marvell EBU host bridge driver that
was merged for v3.11
Hotplug:
PCI: pciehp: Fix null pointer deref when hot-removing SR-IOV device
PCI: hotplug: Convert to be builtin only, not modular
PCI: pciehp: Convert pciehp to be builtin only, not modular
Resource allocation:
PCI: Retry allocation of only the resource type that failed
ARM:
PCI: mvebu: Disable prefetchable memory support in PCI-to-PCI bridge"
* tag 'pci-v3.11-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
PCI: mvebu: Disable prefetchable memory support in PCI-to-PCI bridge
PCI: Retry allocation of only the resource type that failed
PCI: pciehp: Convert pciehp to be builtin only, not modular
PCI: hotplug: Convert to be builtin only, not modular
PCI: pciehp: Fix null pointer deref when hot-removing SR-IOV device
Panda's DVI connector's DDC pins are connected to OMAP's third i2c bus.
With non-DT, the bus number was 3, and that is what is used in the
dss-common.c which contains the platform data for Panda's DVI.
However, with DT, the bus number is 2. As we now only have DT boot for
Panda, we have to change the bus number to make DVI EDID read
operational.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Commit 8bd26e3a7 (arm: delete __cpuinit/__CPUINIT usage from all ARM
users) caused some code to leak into sections which are discarded
through the removal of __CPUINIT annotations. Add appropriate .text
annotations to bring these back into the kernel text.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
If one process calls sys_reboot and that process then stops other
CPUs while those CPUs are within a spin_lock() region we can
potentially encounter a deadlock scenario like below.
CPU 0 CPU 1
----- -----
spin_lock(my_lock)
smp_send_stop()
<send IPI> handle_IPI()
disable_preemption/irqs
while(1);
<PREEMPT>
spin_lock(my_lock) <--- Waits forever
We shouldn't attempt to run any other tasks after we send a stop
IPI to a CPU so disable preemption so that this task runs to
completion. We use local_irq_disable() here for cross-arch
consistency with x86.
Reported-by: Sundarajan Srinivasan <sundaraj@codeaurora.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
If kuser helpers are not provided by the kernel, disable user access to
the vectors page. With the kuser helpers gone, there is no reason for
this page to be visible to userspace.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Move the signal handlers into a VDSO page rather than keeping them in
the vectors page. This allows us to place them randomly within this
page, and also map the page at a random location within userspace
further protecting these code fragments from ROP attacks. The new
VDSO page is also poisoned in the same way as the vector page.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Dick Fowles, Don Zickus and Joe Mario have been working on
improvements to perf, and noticed heavy cache line contention
on the mm_cpumask, running linpack on a 60 core / 120 thread
system.
The cause turned out to be unnecessary atomic accesses to the
mm_cpumask. When in lazy TLB mode, the CPU is only removed from
the mm_cpumask if there is a TLB flush event.
Most of the time, no such TLB flush happens, and the kernel
skips the TLB reload. It can also skip the atomic memory
set & test.
Here is a summary of Joe's test results:
* The __schedule function dropped from 24% of all program cycles down
to 5.5%.
* The cacheline contention/hotness for accesses to that bitmask went
from being the 1st/2nd hottest - down to the 84th hottest (0.3% of
all shared misses which is now quite cold)
* The average load latency for the bit-test-n-set instruction in
__schedule dropped from 10k-15k cycles down to an average of 600 cycles.
* The linpack program results improved from 133 GFlops to 144 GFlops.
Peak GFlops rose from 133 to 153.
Reported-by: Don Zickus <dzickus@redhat.com>
Reported-by: Joe Mario <jmario@redhat.com>
Tested-by: Joe Mario <jmario@redhat.com>
Signed-off-by: Rik van Riel <riel@redhat.com>
Reviewed-by: Paul Turner <pjt@google.com>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/20130731221421.616d3d20@annuminas.surriel.com
[ Made the comments consistent around the modified code. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
When an associativity level change is found for one thread, the
siblings threads need to be updated as well. This is done today
for PRRN in stage_topology_update() but is missing for VPHN in
update_cpu_associativity_changes_mask(). This patch will correctly
update all thread siblings during a topology change.
Without this patch a topology update can result in a CPU in
init_sched_groups_power() getting stuck indefinitely in a loop.
This loop is built in build_sched_groups(). As a result of the thread
moving to a node separate from its siblings the struct sched_group will
have its next pointer set to point to itself rather than the sched_group
struct of the next thread. This happens because we have a domain without
the SD_OVERLAP flag, which is correct, and a topology that doesn't conform
with reality (threads on the same core assigned to different numa nodes).
When this list is traversed by init_sched_groups_power() it will reach
the thread's sched_group structure and loop indefinitely; the cpu will
be stuck at this point.
The bug was exposed when VPHN was enabled in commit b7abef0 (v3.9).
Cc: <stable@vger.kernel.org> [v3.9+]
Reported-by: Jan Stancek <jstancek@redhat.com>
Signed-off-by: Robert Jennings <rcj@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
We use bit 63 of the event code for userspace to request that the event
be counted using EBB (Event Based Branches). Export this value, making
it part of the API - though only on processors that support EBB.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Back in commit 89713ed "Add timer, performance monitor and machine check
counts to /proc/interrupts" we added a count of PMU interrupts to the
output of /proc/interrupts.
At the time we named them "CNT" to match x86.
However in commit 89ccf46 "Rename 'performance counter interrupt'", the
x86 guys renamed theirs from "CNT" to "PMI".
Arguably changing the name could break someone's script, but I think the
chance of that is minimal, and it's preferable to have a name that 1) is
somewhat meaningful, and 2) matches x86.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This patch removes "frequency" parameter from SCCNXP platform_data
and uses CLK API for getting clock. If CLK ommited, default IC
frequency will be used instead.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Merge more patches from Andrew Morton:
"A bunch of fixes.
Plus Joe's printk move and rework. It's not a -rc3 thing but now
would be a nice time to offload it, while things are quiet. I've been
sitting on it all for a couple of weeks, no issues"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
vmpressure: make sure there are no events queued after memcg is offlined
vmpressure: do not check for pending work to prevent from new work
vmpressure: change vmpressure::sr_lock to spinlock
printk: rename struct log to struct printk_log
printk: use pointer for console_cmdline indexing
printk: move braille console support into separate braille.[ch] files
printk: add console_cmdline.h
printk: move to separate directory for easier modification
drivers/rtc/rtc-twl.c: fix: rtcX/wakealarm attribute isn't created
mm: zbud: fix condition check on allocation size
thp, mm: avoid PageUnevictable on active/inactive lru lists
mm/swap.c: clear PageActive before adding pages onto unevictable list
arch/x86/platform/ce4100/ce4100.c: include reboot.h
mm: sched: numa: fix NUMA balancing when !SCHED_DEBUG
rapidio: fix use after free in rio_unregister_scan()
.gitignore: ignore *.lz4 files
MAINTAINERS: dynamic debug: Jason's not there...
dmi_scan: add comments on dmi_present() and the loop in dmi_scan_machine()
ocfs2/refcounttree: add the missing NULL check of the return value of find_or_create_page()
mm: mempolicy: fix mbind_range() && vma_adjust() interaction
We're going to introduce support to read and write the memory
mapped timer registers in the next patch, so push the cp15
read/write functions one level deeper. This simplifies the next
patch and makes it clearer what's going on.
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Marc Zyngier <Marc.Zyngier@arm.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Using an enum for the register we wish to access allows newer
compilers to determine if we've forgotten a case in our switch
statement. This allows us to remove the BUILD_BUG() instances in
the arm64 port, avoiding problems where optimizations may not
happen.
To try and force better code generation we're currently marking
the accessor functions as inline, but newer compilers can ignore
the inline keyword unless it's marked __always_inline. Luckily on
arm and arm64 inline is __always_inline, but let's make
everything __always_inline to be explicit.
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Marc Zyngier <Marc.Zyngier@arm.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
We can't use dev->mod_index for selecting the interrupt routing entry,
because it's not an index into interrupt routing table. It will be even
wrong on a machine with 2 CPUs (4 cores). But all needed information is
contained in the PAT entries for the serial ports. mod[0] contains the
iosapic address and mod_info has some indications for the interrupt
input (at least it looks like it). This patch implements the searching
for the right iosapic and uses this interrupt input information.
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: <stable@vger.kernel.org> # 3.10
Signed-off-by: Helge Deller <deller@gmx.de>
The KERNEL_SYSCALL define is not used anymore so the header can be
removed.
Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
The parisc architecture does not have a pte special bit. As a result,
special mappings are handled with the VM_PFNMAP and VM_MIXEDMAP flags.
VM_MIXEDMAP mappings may or may not have a "struct page" backing. When
pfn_valid() is false, there is no "struct page" backing. Otherwise, they
are treated as normal pages.
The FireGL driver uses the VM_MIXEDMAP without a backing "struct page".
This treatment caused a panic due to a TLB data miss in
update_mmu_cache. This appeared to be in the code generated for
page_address(). We were in fact using a very circular bit of code to
determine the physical address of the PFN in various cache routines.
This wasn't valid when there was no "struct page" backing. The needed
address can in fact be determined simply from the PFN itself without
using the "struct page".
The attached patch updates update_mmu_cache(), flush_cache_mm(),
flush_cache_range() and flush_cache_page() to check pfn_valid() and to
directly compute the PFN physical and virtual addresses.
Signed-off-by: John David Anglin <dave.anglin@bell.net>
Cc: <stable@vger.kernel.org> # 3.10
Signed-off-by: Helge Deller <deller@gmx.de>
Fix the build:
arch/x86/platform/ce4100/ce4100.c: In function 'x86_ce4100_early_setup':
arch/x86/platform/ce4100/ce4100.c:165:2: error: 'reboot_type' undeclared (first use in this function)
Reported-by: Wu Fengguang <fengguang.wu@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Provide a kernel configuration option to allow the kernel user helpers
to be removed from the vector page, thereby preventing their use with
ROP (return orientated programming) attacks. This option is only
visible for CPU architectures which natively support all the operations
which kernel user helpers would normally provide, and must be enabled
with caution.
Cc: <stable@vger.kernel.org>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
FIQ should no longer copy the FIQ code into the user visible vector
page. Instead, it should use the hidden page. This change makes
that happen.
Cc: <stable@vger.kernel.org>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Use linker magic to create the vectors and vector stubs: we can tell the
linker to place them at an appropriate VMA, but keep the LMA within the
kernel. This gets rid of some unnecessary symbol manipulation, and
have the linker calculate the relocations appropriately.
Cc: <stable@vger.kernel.org>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Move the machine vector stubs into the page above the vector page,
which we can prevent from being visible to userspace. Also move
the reset stub, and place the swi vector at a location that the
'ldr' can get to it.
This hides pointers into the kernel which could give valuable
information to attackers, and reduces the number of exploitable
instructions at a fixed address.
Cc: <stable@vger.kernel.org>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Poison the memory between each kuser helper. This ensures that any
branch between the kuser helpers will be appropriately trapped.
Cc: <stable@vger.kernel.org>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Fill the empty regions of the vectors page with an exception generating
instruction. This ensures that any inappropriate branch to the vector
page is appropriately trapped, rather than just encountering some code
to execute. (The vectors page was filled with zero before, which
corresponds with the "andeq r0, r0, r0" instruction - a no-op.)
Cc: <stable@vger.kernel.org>
Acked-by Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Pull MIPS fixes from Ralf Baechle:
- BMIPS SMP fixes
- a build fix necessary for older compilers
- two more bugs found my Chandras' testing
- and one more build fix
* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
MIPS: BMIPS: fix slave CPU booting when physical CPU is not 0
MIPS: BMIPS: do not change interrupt routing depending on boot CPU
MIPS: powertv: Fix arguments for free_reserved_area()
MIPS: Set default CPU type for BCM47XX platforms
MIPS: uapi/asm/siginfo.h: Fix GCC 4.1.2 compilation
MIPS: Fix multiple definitions of UNCAC_BASE.
Return -1 (like Intels apply_microcode) when the loading fails, also
do not set the active microcode level on failure.
Signed-off-by: Torsten Kaiser <just.for.lkml@googlemail.com>
Link: http://lkml.kernel.org/r/20130723225823.2e4e7588@googlemail.com
Acked-by: Borislav Petkov <bp@suse.de>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Register for the extended sleep callback from ACPI.
As tboot currently does not support the reduced hardware sleep
interface, fail this extended sleep call.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Ben Guthro <benjamin.guthro@citrix.com>
Cc: tboot-devel@lists.sourceforge.net
Cc: Gang Wei <gang.wei@intel.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Commit 621a0147d5 ("ARM: 7757/1: mm:
don't flush icache in switch_mm with hardware broadcasting") breaks
the boot on OMAP2430SDP with omap2plus_defconfig. Tracked to an
undefined instruction abort from the CP15 read in
cache_ops_need_broadcast(). It turns out that gcc 4.5 reorders the
extended CP15 read above the is_smp() test. This breaks ARM1136 r0
cores, since they don't support several CP15 registers that later ARM
cores do. ARM1136JF-S TRM section 3.2.1 "Register allocation" has the
details.
So mark the extended CP15 read as clobbering memory, which prevents
the compiler from reordering it before the is_smp() test. Russell
states that the code generated from this approach is preferable to
marking the inline asm as volatile. Remove the existing condition
code clobber as it's obsolete, per Nico's post:
http://www.spinics.net/lists/arm-kernel/msg261208.html
This patch is a collaboration with Will Deacon and Russell King.
Comments from Paul Walmsley:
Russell, if you accept this one, might you also add Will's ack from the lists:
Comments from Paul Walmsley:
I'd also be obliged if you could add a Cc: line for Jonathan Austin, since he helped test:
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Nicolas Pitre <nicolas.pitre@linaro.org>
Cc: Tony Lindgren <tony@atomide.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Cc: Jonathan Austin <jonathan.austin@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
The name changed in response to review comments for the nvic irqchip
driver when the original name was already accepted into Russell King's
tree.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
When the gpio-keys device is registered using
platform_device_register_data() the platform data argument,
lager_keys_pdata is duplicated and thus should be marked as __initdata
to avoid wasting memory. However, this is not true of gpio_buttons,
a reference to it rather than its value is duplicated when lager_keys_pdata
is duplicated.
This avoids accessing freed memory if gpio-key events occur
after unused kernel memory is freed late in the kernel's boot.
This but was added when support for gpio-keys was added to lager
in c3842e4fcb
("ARM: shmobile: lager: support GPIO switches") which was included
in v3.11-rc1.
Tested-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
The following message is printed on the BOCK-W kernel bootup:
sh-pfc pfc-r8a7778: invalid group "sdhi0" for function "sdhi0"
In addition, SD card cannot be detected. The reason is apparently that commit
ca7bb30948 (ARM: shmobile: bockw: add SDHI0 support) matched
the previous version of commit 564617d2f9 (sh-pfc: r8a7778:
add SDHI support).
Add the missing pin groups according to the BOCK-W board schematics.
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
specified in pages, not bytes - Roy Franz.
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Merge tag 'efi-urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/mfleming/efi into x86/urgent
Pull EFI fix from Matt Fleming:
* The size of memory that gets freed by free_pages() needs to be
specified in pages, not bytes - by Roy Franz.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
The current BMIPS SMP code assumes that the slave CPU is physical and
logical CPU 1, but on some systems such as BCM3368, the slave CPU is
physical CPU0. Fix the code to read the physical CPU (thread ID) we are
running this code on, and adjust the relocation vector address based on
it. This allows bringing up the second CPU on BCM3368 for instance.
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Cc: linux-mips@linux-mips.org
Cc: cernekee@gmail.com
Cc: jogo@openwrt.org
Cc: blogic@openwrt.org
Patchwork: https://patchwork.linux-mips.org/patch/5621/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Commit 4df715aa ("MIPS: BMIPS: support booting from physical CPU other
than 0") changed the interupt routing when we are booting from physical
CPU 0, but the settings are actually correct if we are booting from
physical CPU 0 or CPU 1. Revert that specific change.
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Cc: linux-mips@linux-mips.org
Cc: cernekee@gmail.com
Cc: jogo@openwrt.org
Cc: blogic@openwrt.org
Patchwork: https://patchwork.linux-mips.org/patch/5622/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Commit 6e7582bf35
"MIPS: PowerTV: use free_reserved_area() to simplify code"
merged in 3.11-rc1, broke the build for the powertv defconfig with
the following build error:
arch/mips/powertv/asic/asic_devices.c: In function 'platform_release_memory':
arch/mips/powertv/asic/asic_devices.c:533:7: error: passing argument 1 of
'free_reserved_area' makes pointer from integer without a cast [-Werror]
The free_reserved_area() function expects a void * pointer for the start
address and a void * pointer for the end one.
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5624/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
If neither BCM47XX_SSD nor BCM47XX_BCMA is selected, then no
CPU type is available leading to build problems. We fix
this problem by using MIPS32r1 as the default CPU type for
the BCM47XX platform.
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Acked-by: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5618/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
It wasn't until GCC 4.3 I believe that the __SIZEOF_*__ predefined macros
were added. The change below switches <uapi/asm/siginfo.h> to the
_MIPS_SZLONG macro so that compilation with e.g. GCC 4.1.2 succeeds.
This is a user API header so I think this is even more important, for
older userland support. The change adds an unsuccessful default too, to
catch any compiler configuration oddities.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5630/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Fix build error below:
arch/mips/include/asm/mach-generic/spaces.h:29:0: warning:
"UNCAC_BASE" redefined [enabled by default]
In file included from arch/mips/include/asm/addrspace.h:13:0,
from arch/mips/include/asm/barrier.h:11,
from arch/mips/include/asm/bitops.h:18,
from include/linux/bitops.h:22,
from include/linux/kernel.h:10,
from include/asm-generic/bug.h:13,
from arch/mips/include/asm/bug.h:41,
from include/linux/bug.h:4,
from include/linux/page-flags.h:9,
from kernel/bounds.c:9:
arch/mips/include/asm/mach-ar7/spaces.h:20:0: note: this is the
location of the previous definition
Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5583/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Register target address to be used for cpgmac is the second device
address space. By default, hwmod picks first address space (0th index)
for register target.
With removal of address space from hwmod and using DT instead, cpgmac
is getting wrong address space for register target.
Fix it by indicating the address space to be used for register target.
Signed-off-by: Afzal Mohammed <afzal@ti.com>
Tested-by: Mugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Address space is being removed from hwmod database and DT information
in <reg> property is being used. Currently the 0th index of device
address space is used to map for register target address. This is not
always true, eg. cpgmac has it's sysconfig in second address space.
Handle it by specifying index of device address space to be used for
register target. As default value of this field would be zero with
static initialization, existing behaviour of using first address space
for register target while using DT would be kept as such.
Signed-off-by: Afzal Mohammed <afzal@ti.com>
Tested-by: Mugunthan V N <mugunthanvnm@ti.com>
[paul@pwsan.com: use u8 rather than int to save memory]
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Some hwmods which are marked with HWMOD_INIT_NO_IDLE are left in enabled
state post setup(). When a omap_device gets created for such hwmods
make sure the omap_device and pm_runtime states are also in sync for such
hwmods by doing a omap_device_enable() and pm_runtime_set_active() for the
device.
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Tested-by: Mark Jackson <mpfj-list@newflow.co.uk>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Memory controllers in OMAP (like GPMC and EMIF) have the hwmods marked with
HWMOD_INIT_NO_IDLE and are left in enabled state post initial setup.
Even if they have drivers missing, avoid idling them as part of
omap_device_late_idle()
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Tested-by: Mark Jackson <mpfj-list@newflow.co.uk>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
With commit '82702ea11ddfe0e43382e1fa5b66d807d8114916' "ARM: OMAP2+:
Fix serial init for device tree based booting" stubbing out
omap_serial_early_init() for Device tree based booting, there was a
crash observed on AM335x based devices when hwmod does a
_setup_reset() early at boot.
This was rootcaused to hwmod trying to reset console uart while
earlycon was using it. The way to tell hwmod not to do this is to
specify the HWMOD_INIT_NO_RESET flag, which were infact set by the
omap_serial_early_init() function by parsing the cmdline to identify
the console device.
Parsing the cmdline to identify the uart used by earlycon itself seems
broken as there is nothing preventing earlycon to use a different one.
This patch, instead, attempts to populate the requiste flags for hwmod
based on the CONFIG_DEBUG_OMAPxUARTy FLAGS. This gets rid of the need
for cmdline parsing in the DT as well as non-DT cases to identify the
uart used by earlycon.
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Reported-by: Mark Jackson <mpfj-list@newflow.co.uk>
Reported-by: Vaibhav Bedia <vaibhav.bedia@ti.com>
Tested-by: Mark Jackson <mpfj-list@newflow.co.uk>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
commit e00c27ef3b
(ARM: dts: OMAP5: Add Palmas MFD node and regulator nodes)
introduced regulator entries for OMAP5uEVM.
However, The regulator information is based on an older temporary
pre-production board variant and does not reflect production board
750-2628-XXX boards.
The following optional/unused regulators can be updated:
- SMPS9 supplies TWL6040 over VDDA_2v1_AUD. This regulator needs to be
enabled only when audio is active. Since it does not come active by
default, it does not require "always-on" or "boot-on".
- LDO2 and LDO8 do not go to any peripheral or connector on the board.
Further, these unused regulators should have been 2.8V for LDO2 and
3.0V for LDO8. Mark these LDOs as disabled in the dts until needed.
Reported-by: Marc Jüttner <m-juettner@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: J Keerthy <j-keerthy@ti.com>
Acked-by: Benoit Cousson <benoit.cousson@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
commit e00c27ef3b
(ARM: dts: OMAP5: Add Palmas MFD node and regulator nodes)
introduced regulator entries for OMAP5uEVM.
However, The regulator information is based on an older temporary
pre-production board variant and does not reflect production board
750-2628-XXX boards.
The following fixes are hence mandatory to ensure right voltage is
supplied to key OMAP5 SoC voltage rails:
- LDO1 supplies VDDAPHY_CAM which is OMAP5's vdda_csiporta/b/c. This
can only be supplied at 1.5V or 1.8V and we currently supply 2.8V.
To prevent any potential device damage risk, use the specified
1.5V-1.8V supply.
Remove 'always-on' and 'boot-on' settings here as it is
a 'on need' supply to SoC IP and is not enabled by PMIC by
default at boot.
- LDO3 supplies Low Latency Interface(LLI) hardware module which is a
special hardware to communicate with Modem. However since uEVM is
not setup by default for this communication, this should be disabled
by default.
Further, vdda_lli is supposed to be 1.5V and not 3V.
- LDO4 supplies VDDAPHY_DISP which is vdda_dsiporta/c/vdda_hdmi
This can only be supplied at 1.5V or 1.8V and we currently
supply 2.2V.
To prevent any potential device damage risk, use the specified
1.5V-1.8V supply.
Remove 'always-on' and 'boot-on' settings here as it is a 'on need'
supply to SoC IP and is not enabled by PMIC by default at boot.
- LDO6 supplies the board specified VDDS_1V2_WKUP supply going to
ldo_emu_wkup/vdds_hsic. To stay within the SoC specification supply
1.2V instead of 1.5V.
- LDO7 supplies VDD_VPP which is vpp1. This is currently configured for
1.5V which as per data manual "A pulse width of 1000 ns and an amplitude
of 2V is required to program each eFuse bit. Otherwise, VPP1 must not
be supplied".
So, fix the voltage to 2V. and disable the supply since we have no plans
of programming efuse bits - it can only be done once - in factory.
Further it is not enabled by default by PMIC so, 'boot-on' must be
removed, and the 'always-on' needs to be removed to achieve pulsing
if efuse needs to be programmed.
- LDO9 supplies the board specified vdds_sdcard supply going within SoC
specification of 1.8V or 3.0V. Further the supply is controlled by
switch enabled by REGEN3. So, introduce REGEN3 and map sdcard slot to
be powered by LDO9. Remove 'always-on' allowing the LDO to be disabled
on need basis.
Reported-by: Marc Jüttner <m-juettner@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: J Keerthy <j-keerthy@ti.com>
Acked-by: Benoit Cousson <benoit.cousson@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
commit e00c27ef3b
(ARM: dts: OMAP5: Add Palmas MFD node and regulator nodes)
introduced regulator entries for OMAP5uEVM.
However, currently we use the Palmas regulator names which is used for
different purposes on uEVM. Document the same based on 750-2628-XXX
boards - which is meant to be supported by this dts.
Reported-by: Marc Jüttner <m-juettner@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: J Keerthy <j-keerthy@ti.com>
Acked-by: Benoit Cousson <benoit.cousson@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Since commit 7ed76e08 (ARM: EXYNOS: Fix low level debug support)
map_io() is not needed for exynos5440 so need to fix to lookup
cpu which using map_io(). Without this, kernel boot log complains
'CPU EXYNOS5440 support not enabled' on exynos5440 and panic().
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
In commit 33d7885b59
x86/mce: Update MCE severity condition check
We simplified the rules to recognise each classification of recoverable
machine check combining the instruction and data fetch rules into a
single entry based on clarifications in the June 2013 SDM that all
recoverable events would be reported on the unaffected processor with
MCG_STATUS.EIPV=0 and MCG_STATUS.RIPV=1. Unfortunately the simplified
rule has a couple of bugs. Fix them here.
Acked-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
USB-related platform data is not used anymore in the Tegra USB drivers,
so remove all of it.
Signed-off-by: Tuomas Tynkkynen <ttynkkynen@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
USB VBUS regulators are now specified with the vbus-supply property
instead of nvidia,vbus-gpio, so remove the obsolete properties.
The equivalent vbus-supply properties were already added in patch
"ARM: tegra: update device trees for USB binding rework".
Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This patch changes the Tegra20 USB PHY nodes to use the UTMI configuration
parameter names as specified in the device tree binding documentation
after patch "ARM: tegra: finalize USB EHCI and PHY bindings".
Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
all other drivers using Synopsys IPs with DT
have a compatible of snps,$driver, in order
to add consistency, we are switching over to
snps,dwc3 but keeping synopsys,dwc3 in the core
driver to maintain backwards compatibility.
New DTS bindings should NOT use synopsys,dwc3.
Signed-off-by: Felipe Balbi <balbi@ti.com>
Fix the test within handle_pfmf() if the host has the NQ key-setting
facility installed.
Right now the code would incorrectly generate a program check in the
guest if the NQ control bit for a pfmf request was set and if the host
has the NQ key-setting facility installed.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Any uaccess between guest_enter and guest_exit could trigger a page fault,
the page fault handler would handle it as a guest fault and translate a
user address as guest address.
Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
CC: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
- Driver fixes for AM33xx, SIRF and PFC pin controllers.
- Fix a compile warning from the pinctrl single-register
driver.
- Fix a little nasty memory leak.
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Merge tag 'pinctrl-for-v3.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl
Pull pin control fixes from Linus Walleij:
- Driver fixes for AM33xx, SIRF and PFC pin controllers
- Fix a compile warning from the pinctrl single-register driver
- Fix a little nasty memory leak
* tag 'pinctrl-for-v3.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
pinctrl: fix a memleak when freeing maps
pinctrl: pinctrl-single: fix compile warning when no CONFIG_PM
pinctrl: sh-pfc: fix SDHI0 VccQ regulator on sh73a0 with DT
arm/dts: sirf: fix the pingroup name mismatch between drivers and dts
pinctrl: sirf: add usp0_uart_nostreamctrl pin group for usp-uart without flowctrl
pinctrl: sirf: fix the pin number and mux bit for usp0
pinctrl: am33xx dt binding: correct include path
There is no more dependency with arch/arm headers, so we can safely move the
driver to the drivers/cpuidle directory.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
The db8500-regs.h file does not need to be included by the cpuidle
driver.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
To break the dependency on the "id.h" file we move the cpuidle driver
to a platform device. Now we only call the probe() on this driver if
we find a corresponding platform device (which is spawned from the
PRCMU MFD driver).
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
The commit 19976c2a88 changed the target
residency to 100000, assuming this is a careless mistake.
The same happened to the at91's cpuidle driver.
Fix it by putting the initial value to 10000.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Sekhar Nori <nsekhar@ti.com>
So, there's a comment I put at the top of this, which people seem to
fail to read. So let's fix it for them instead.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Msm gpiomux can be used only for 7x30 and 8x50.
Prevent compilation and fix build issues on 7X00, 8X60 and 8960.
Signed-off-by: Rohit Vaswani <rvaswani@codeaurora.org>
Signed-off-by: David Brown <davidb@codeaurora.org>
The implementation of function __acpi_map_table() has been
changed long time ago, and now it directly invokes
early_ioremap() to setup the temporarily acpi table mappings.
So correct its out-of-date comment.
Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Cc: len.brown@intel.com
Cc: pavel@ucw.cz
Cc: rjw@sisk.pl
Link: http://lkml.kernel.org/r/51EE7F1C.9020506@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This is a largeish batch of fixes, mostly because I missed -rc2 due to
travel/vacation. So in number these are a bit more than ideal unless
you amortize them over two -rcs.
Quick breakdown:
- Defconfig updates
- Making multi_v7_defconfig useful on more hardware to encourage
single-image usage
- Davinci and nomadik updates due to new code merged this merge window
- Fixes for UART on Samsung platforms, both PM and clock-related
- A handful of warning fixes from defconfig builds, including for
max8925 backlight and pxamci (both with appropriate acks)
- Exynos5440 fixes for LPAE configuration, PM
- ...plus a bunch of other smaller changes all over the place
I expect to switch to regressions-or-severe-bugs-only fixes from here
on out.
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Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Olof Johansson:
"This is a largeish batch of fixes, mostly because I missed -rc2 due to
travel/vacation. So in number these are a bit more than ideal unless
you amortize them over two -rcs.
Quick breakdown:
- Defconfig updates
- Making multi_v7_defconfig useful on more hardware to encourage
single-image usage
- Davinci and nomadik updates due to new code merged this merge
window
- Fixes for UART on Samsung platforms, both PM and clock-related
- A handful of warning fixes from defconfig builds, including for
max8925 backlight and pxamci (both with appropriate acks)
- Exynos5440 fixes for LPAE configuration, PM
- ...plus a bunch of other smaller changes all over the place
I expect to switch to regressions-or-severe-bugs-only fixes from here
on out"
* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (37 commits)
mfd: max8925: fix dt code for backlight
ARM: omap5: Only select errata 798181 if SMP
ARM: EXYNOS: Update CONFIG_ARCH_NR_GPIO for Exynos
ARM: EXYNOS: Fix low level debug support
ARM: SAMSUNG: Save/restore only selected uart's registers
ARM: SAMSUNG: Add SAMSUNG_PM config option to select pm
ARM: S3C24XX: Add missing clkdev entries for s3c2440 UART
ARM: multi_v7_defconfig: Select USB chipidea driver
ARM: pxa: propagate errors from regulator_enable() to pxamci
ARM: zynq: fix compilation warning
ARM: keystone: fix compilation warning
ARM: highbank: Only touch common coherency control register fields
ARM: footbridge: fix overlapping PCI mappings
dmaengine: shdma: fix a build failure on platforms with no DMA support
ARM: STi: Set correct ARM ERRATAs.
ARM: dts: STi: Fix pinconf setup for STiH416 serial2
ARM: nomadik: configure for NO_HZ and HRTIMERS
ARM: nomadik: update defconfig base
ARM: nomadik: Update MMC defconfigs
ARM: davinci: defconfig: enable EDMA driver
...
We can check for addr being zero earlier and thus avoid the mutex_unlock()
cleanup path.
[bhelgaas: drop warning printk]
Signed-off-by: ethan.zhao <ethan.zhao@oracle.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
GCC will optimize mxcsr_feature_mask_init in arch/x86/kernel/i387.c:
memset(&fx_scratch, 0, sizeof(struct i387_fxsave_struct));
asm volatile("fxsave %0" : : "m" (fx_scratch));
mask = fx_scratch.mxcsr_mask;
if (mask == 0)
mask = 0x0000ffbf;
to
memset(&fx_scratch, 0, sizeof(struct i387_fxsave_struct));
asm volatile("fxsave %0" : : "m" (fx_scratch));
mask = 0x0000ffbf;
since asm statement doesn’t say it will update fx_scratch. As the
result, the DAZ bit will be cleared. This patch fixes it. This bug
dates back to at least kernel 2.6.12.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: <stable@vger.kernel.org>
Written by Catalin Marinas, tested by APM on storm platform. This is needed
because of the failures encountered when running SpecWeb benchmark test.
Signed-off-by: Feng Kan <fkan@apm.com>
Acked-by: Kumar Sankaran <ksankaran@apm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
The perf_event code references sie_exit even if KVM is not available.
So add proper ifdefs to fix this one:
arch/s390/built-in.o: In function `sys_call_table_emu':
(.rodata+0x2b98): undefined reference to `sie_exit'
arch/s390/built-in.o: In function `sys_call_table_emu':
(.rodata+0x2ba0): undefined reference to `sie_exit'
make: *** [vmlinux] Error 1
Reported-by: Zhouping Liu <zliu@redhat.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
The find_next_bit_left function is broken if used with an offset which
is not a multiple of 64. The shift to mask the bits of a 64-bit word
not to search is in the wrong direction, the result can be either a
bit found smaller than the offset or failure to find a set bit.
Cc: <stable@vger.kernel.org> # v3.8+
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Just add the new model number where appropiate.
Cc: stable@vger.kernel.org # v3.10
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
'VIRTIO_CONSOLE' depends on 'TTY', so need to select 'TTY' explicitly
before selecting 'VIRTIO_CONSOLE'.
Otherwise randconfig can generate a config file which enables
'VIRTIO_CONSOLE' but has 'TTY' disabled.
Signed-off-by: Chen Gang <gang.chen@asianux.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
a.out support on ARM requires that argc, argv and envp are passed in
r0-r2 respectively, which requires hacking load_aout_binary to
prevent argc being clobbered by the return code. Whilst mainline kernels
do set the registers up in start_thread, the aout loader has never
carried the hack in mainline.
Initialising the registers in this way actually goes against the libc
expectations for ELF binaries, where argc, argv and envp are passed on
the stack, with r0 being used to hold a pointer to an exit function for
cleaning up after the dynamic linker if required. If the pointer is
NULL, then it is ignored. When execing an ELF binary, Linux currently
zeroes r0, then sets it to argc and then finally clobbers it with the
return value of the execve syscall, so we actually end up with:
r0 = 0
stack[0] = argc
r1 = stack[1] = argv
r2 = stack[2] = envp
libc treats r1 and r2 as undefined. The clobbering of r0 by sys_execve
works for user-spawned threads, but when executing an ELF binary from a
kernel thread (via call_usermodehelper), the execve is performed on the
ret_from_fork path, which restores r0 from the saved pt_regs, resulting
in argc being presented to the C library. This has horrible consequences
when the application exits, since we have an exit function registered
using argc, resulting in a jump to hyperspace.
This patch solves the problem by removing the partial a.out support from
arch/arm/ altogether.
Cc: <stable@vger.kernel.org>
Cc: Ashish Sangwan <ashishsangwan2@gmail.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
As of commit b9d4d42ad9 (ARM: Remove __ARCH_WANT_INTERRUPTS_ON_CTXSW on
pre-ARMv6 CPUs), the mm switching on VIVT processors is done in the
finish_arch_post_lock_switch() function to avoid whole cache flushing
with interrupts disabled. The need for deferred mm switch is stored as a
thread flag (TIF_SWITCH_MM). However, with preemption enabled, we can
have another thread switch before finish_arch_post_lock_switch(). If the
new thread has the same mm as the previous 'next' thread, the scheduler
will not call switch_mm() and the TIF_SWITCH_MM flag won't be set for
the new thread.
This patch moves the switch pending flag to the mm_context_t structure
since this is specific to the mm rather than thread.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Marc Kleine-Budde <mkl@pengutronix.de>
Tested-by: Marc Kleine-Budde <mkl@pengutronix.de>
Cc: <stable@vger.kernel.org> # 3.5+
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Commit 93dc688 (ARM: 7684/1: errata: Workaround for Cortex-A15 erratum 798181 (TLBI/DSB operations)) causes the following undefined instruction error on a mx53 (Cortex-A8):
Internal error: Oops - undefined instruction: 0 [#1] SMP ARM
CPU: 0 PID: 275 Comm: modprobe Not tainted 3.11.0-rc2-next-20130722-00009-g9b0f371 #881
task: df46cc00 ti: df48e000 task.ti: df48e000
PC is at check_and_switch_context+0x17c/0x4d0
LR is at check_and_switch_context+0xdc/0x4d0
This problem happens because check_and_switch_context() calls dummy_flush_tlb_a15_erratum() without checking if we are really running on a Cortex-A15 or not.
To avoid this issue, only call dummy_flush_tlb_a15_erratum() inside
check_and_switch_context() if erratum_a15_798181() returns true, which means that we are really running on a Cortex-A15.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Secondary CPUs write to __boot_cpu_mode with caches disabled, and thus a
cached value of __boot_cpu_mode may be incoherent with that in memory.
This could lead to a failure to detect mismatched boot modes.
This patch adds flushing to ensure that writes by secondaries to
__boot_cpu_mode are made visible before we test against it.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Dave Martin <Dave.Martin@arm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: Christoffer Dall <cdall@cs.columbia.edu>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
The target frequency calculation method in the ondemand governor has
changed and it is now independent of the measured average frequency.
Consequently, the APERF/MPERF support in cpufreq is not used any
more, so drop it.
[rjw: Changelog]
Signed-off-by: Stratos Karafotis <stratosk@semaphore.gr>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Convert CONFIG_HOTPLUG_PCI from tristate to bool. This only affects
the hotplug core; several of the hotplug drivers can still be modules.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
We currently enable PCI bridges after scanning a bus and assigning
resources. This is often done in arch code.
This patch changes this so we don't enable a bridge until necessary, i.e.,
until we enable a PCI device behind the bridge. We do this in the generic
pci_enable_device() path, so this also removes the arch-specific code to
enable bridges.
[bhelgaas: changelog]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
pcibios_fixup_bus() is called by pci_scan_child_bus(), which is not marked
__init. Therefore, pcibios_fixup_bus() cannot be marked __init either.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This patch fixes warning and errors found by checkpatch.pl:
* replace asm/acpi.h, asm/io.h and asm/smp.h with linux/acpi.h,
linux/io.h and linux/smp.h respectively
* remove explicit initialization to 0 of a static global variable
* replace printk(KERN_INFO ...) with pr_info
* use tabs instead of spaces for indentation
* arrange comments so that they adhere to Documentation/CodingStyle
[bhelgaas: capitalize "PCI", "Langwell", "Lincroft" consistently]
Signed-off-by: Valentina Manea <valentina.manea.m@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
89ae7b5bbd
(ARM: shmobile: armadillo800eva: Register pinctrl mapping for INTC)
mistakenly requests GPIO 166 in board code,
most probably due to a wrong merge conflict resolution.
As the GPIO is passed to the st1232 driver through platform
data and requested by the driver,
there's no need to request it in board code. Fix it.
Tested by: Cao Minh Hiep <cm-hiep@jinso.co.jp>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
- fix kernel booting on exynos5440
skip pm which is not supported
update regarding LPAE features
- fix s3c2440 uart with adding clkdev entries
- fix compilatioin for Samsung SoCs with selecting pm
- update ARCH_NR_GPIO to support exynos4412 has more gpios
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Merge tag 'samsung-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into fixes
From Kukjin Kim:
Samsung fixes for v3.11
- fix kernel booting on exynos5440
skip pm which is not supported
update regarding LPAE features
- fix s3c2440 uart with adding clkdev entries
- fix compilatioin for Samsung SoCs with selecting pm
- update ARCH_NR_GPIO to support exynos4412 has more gpios
* tag 'samsung-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
ARM: EXYNOS: Update CONFIG_ARCH_NR_GPIO for Exynos
ARM: EXYNOS: Fix low level debug support
ARM: SAMSUNG: Save/restore only selected uart's registers
ARM: SAMSUNG: Add SAMSUNG_PM config option to select pm
ARM: S3C24XX: Add missing clkdev entries for s3c2440 UART
ARM: EXYNOS: Enable 64-bit DMA for EXYNOS5440 if LPAE is enabled
ARM: EXYNOS: change the PHYSMEM_BITS and SECTION_SIZE
ARM: EXYNOS: skip pm support on exynos5440
Signed-off-by: Olof Johansson <olof@lixom.net>
Avoids the following warning when SMP is off:
warning: (ARCH_KEYSTONE && SOC_OMAP5) selects ARM_ERRATA_798181 which
has unmet direct dependencies (CPU_V7 && SMP)
Reported-by: Emilio López <emilio@elopez.com.ar>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
Pull powerpc fixes from Ben Herrenschmidt:
"Here is a series of powerpc fixes. It's a bit big, mostly because of
the series of 11 "EEH" patches from Gavin. The EEH (Our IBM specific
PCI/PCIe Enhanced Error Handling) code had been rotting for a while
and this merge window saw a significant rework & fixing of it by Gavin
Shan.
However, that wasn't complete and left some open issues. There were
still a few corner cases that didn't work properly, for example in
relation to hotplug and devices without explicit error handlers. We
had some patches but they weren't quite good enough yet so I left them
off the 3.11 merge window.
Gavin since then fixed it all up, we ran quite a few rounds of testing
and it seems fairly solid (at least probably more than it has ever
been). This should probably have made -rc1 but both Gavin and I took
some vacation so it had to wait for -rc2.
The rest is more bug fixes, mostly to new features recently added, for
example, we missed the cpu table entry for one of the two models of P8
(we didn't realize they had different PVR [Processor Version Register]
values), some module CRC issues, etc..."
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (23 commits)
powerpc/perf: BHRB filter configuration should follow the task
powerpc/perf: Ignore separate BHRB privilege state filter request
powerpc/powernv: Mark pnv_pci_init_ioda2_phb() as __init
powerpc/mm: Use the correct SLB(LLP) encoding in tlbie instruction
powerpc/mm: Fix fallthrough bug in hpte_decode
powerpc/pseries: Fix a typo in pSeries_lpar_hpte_insert()
powerpc/eeh: Introdce flag to protect sysfs
powerpc/eeh: Fix unbalanced enable for IRQ
powerpc/eeh: Don't use pci_dev during BAR restore
powerpc/eeh: Use partial hotplug for EEH unaware drivers
powerpc/pci: Partial tree hotplug support
powerpc/eeh: Use safe list traversal when walking EEH devices
powerpc/eeh: Keep PE during hotplug
powerpc/pci/hotplug: Don't need to remove from EEH cache twice
powerpc/pci: Override pcibios_release_device()
powerpc/eeh: Export functions for hotplug
powerpc/eeh: Remove reference to PCI device
powerpc: Fix the corrupt r3 error during MCE handling.
powerpc/perf: Set PPC_FEATURE2_EBB when we register the power8 PMU
powerpc/pseries: Drop "select HOTPLUG"
...
Pull crypto fixes from Herbert Xu:
"This push fixes a memory corruption issue in caam, as well as
reverting the new optimised crct10dif implementation as it breaks boot
on initrd systems.
Hopefully crct10dif will be reinstated once the supporting code is
added so that it doesn't break boot"
* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
Revert "crypto: crct10dif - Wrap crc_t10dif function all to use crypto transform framework"
crypto: caam - Fixed the memory out of bound overwrite issue
With the recent cleanup in Exynos platform code notably commits
17859bec ("ARM: EXYNOS: Do not select legacy Kconfig symbols any
more") and b9222210 ("ARM: EXYNOS: Remove mach/gpio.h"), the definition
of ARCH_NR_GPIOS got removed. This started causing problems on SoCs like
Exynos4412 which have more than the default number of GPIOs. Thus define
this number in KConfig file which takes care of current SoC requirements
and provides scope for GPIO expanders. Without this patch we get the
following errors during boot:
gpiochip_add: gpios 251..258 (gpv0) failed to register
samsung-pinctrl 106e0000.pinctrl: failed to register gpio_chip gpv0, error code: -22
samsung-pinctrl: probe of 106e0000.pinctrl failed with error -22
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Cc: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Presently, using exynos_defconfig with CONFIG_DEBUG_LL and CONFIG_EARLY_PRIN
on, kernel is not booting, we are getting following:
[ 0.000000] ------------[ cut here ]------------
[ 0.000000] kernel BUG at mm/vmalloc.c:1134!
[ 0.000000] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP ARM
[ 0.000000] Modules linked in:
[ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 3.11.0-rc1 #633
[ 0.000000] task: c052ec48 ti: c0524000 task.ti: c0524000
[ 0.000000] PC is at vm_area_add_early+0x54/0x94
[ 0.000000] LR is at add_static_vm_early+0xc/0x60
Its because exynos[4/5]_map_io() function ioremaps a single 512KB memory
size for all the four uart ports which envelopes the mapping created by
debug_ll_io_init(), called earlier in exynos_init_io().
This patch removes iodesc entries for UART controller for all Samsung SoC's,
since now the Samsung uart driver does a ioremap during probe and any needed
iomapping for earlyprintk will be handled by debug_ll_io_init().
Tested on smdk4412 and smdk5250.
Signed-off-by: Yadwinder Singh Brar <yadi.brar@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Basically this code gets executed only during debugging i.e when
DEBUG_LL & SAMSUNG_PM_DEBUG is on, so required only for UART used
for debugging. Since we are removing static iodesc entries for UARTs,
so now only the selected (CONFIG_DEBUG_S3C_UART) UART will be
ioremapped by the debug_ll_io_init() for DEBUG_LL, so save/restore
uart registers only for selected uart.
Signed-off-by: Yadwinder Singh Brar <yadi.brar@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
This reverts commits
67822649d739761214ee0b95a7f85731d939625a2d31e518a4
Unfortunately this change broke boot on some systems that used an
initrd which does not include the newly created crct10dif modules.
As these modules are required by sd_mod under certain configurations
this is a serious problem.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This patch enables the selection of samsung pm related stuffs
when SAMSUNG_PM config is enabled and not just when generic PM
config is enabled. Power management for s3c64XX and s3c24XX
is enabled by default and for other platform depends on S5P_PM.
This patch also fixes the following compilation error's when compiling
a platform like exynos5440 which does not select pm stuffs.
arch/arm/mach-exynos/built-in.o: In function '__virt_to_phys':
linux/arch/arm/include/asm/memory.h:175: undefined reference to 's3c_cpu_resume'
linux/arch/arm/include/asm/memory.h:175: undefined reference to 's3c_cpu_resume'
linux/arch/arm/include/asm/memory.h:175: undefined reference to 's3c_cpu_resume'
linux/arch/arm/include/asm/memory.h:175: undefined reference to 's3c_cpu_resume'
arch/arm/mach-exynos/built-in.o: In function 'exynos5_init_irq':
linux/arch/arm/mach-exynos/common.c:492: undefined reference to 's3c_irq_wake'
linux/arch/arm/mach-exynos/common.c:492: undefined reference to 's3c_irq_wake'
arch/arm/mach-exynos/built-in.o: In function 'exynos4_init_irq':
linux/arch/arm/mach-exynos/common.c:476: undefined reference to 's3c_irq_wake'
linux/arch/arm/mach-exynos/common.c:476: undefined reference to 's3c_irq_wake'
arch/arm/plat-samsung/built-in.o: In function 's3c_irqext_wake':
linux/arch/arm/plat-samsung/pm.c:144: undefined reference to 's3c_irqwake_eintallow'
linux/arch/arm/plat-samsung/pm.c:144: undefined reference to 's3c_irqwake_eintallow'
arch/arm/plat-samsung/built-in.o: In function 's3c_pm_enter':
linux/arch/arm/plat-samsung/pm.c:263: undefined reference to 's3c_irqwake_intallow'
linux/arch/arm/plat-samsung/pm.c:263: undefined reference to 's3c_irqwake_intallow'
linux/arch/arm/plat-samsung/pm.c:264: undefined reference to 's3c_irqwake_eintallow'
linux/arch/arm/plat-samsung/pm.c:264: undefined reference to 's3c_irqwake_eintallow'
linux/arch/arm/plat-samsung/pm.c:275: undefined reference to 's3c_pm_save_core'
linux/arch/arm/plat-samsung/pm.c:279: undefined reference to 's3c_pm_configure_extint'
linux/arch/arm/plat-samsung/pm.c:310: undefined reference to 's3c_pm_restore_core'
make: *** [vmlinux] Error 1
Signed-off-by: Amit Daniel Kachhap <amit.daniel@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
When the task moves around the system, the corresponding cpuhw
per cpu strcuture should be popullated with the BHRB filter
request value so that PMU could be configured appropriately with
that during the next call into power_pmu_enable().
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Acked-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Completely ignore BHRB privilege state filter request as we are
already configuring that with privilege state filtering attribute
for the accompanying PMU event. This would help achieve cleaner
user space interaction for BHRB.
This patch fixes a situation like this
Before patch:-
------------
./perf record -j any -e branch-misses:k ls
Error:
The sys_perf_event_open() syscall returned with 95 (Operation not
supported) for event (branch-misses:k).
/bin/dmesg may provide additional information.
No CONFIG_PERF_EVENTS=y kernel support configured?
Here 'perf record' actually copies over ':k' filter request into BHRB
privilege state filter config and our previous check in kernel would
fail that.
After patch:-
-------------
./perf record -j any -e branch-misses:k ls
perf perf.data perf.data.old test-mmap-ring
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.002 MB perf.data (~102 samples)]
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Acked-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Mark pnv_pci_init_ioda2_phb() as __init. It is called only from an
init function (pnv_pci_init()), and it calls an init function
(pnv_pci_init_ioda_phb()):
pnv_pci_init # init
pnv_pci_init_ioda2_phb # non-init
pnv_pci_init_ioda_phb # init
This should fix a section mismatch warning.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
The sllp value is stored in mmu_psize_defs in such a way that we can easily OR
the value to get the operand for slbmte instruction. ie, the L and LP bits are
not contiguous. Decode the bits and use them correctly in tlbie.
regression is introduced by 1f6aaaccb1
"powerpc: Update tlbie/tlbiel as per ISA doc"
Reported-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
We should not fallthrough different case statements in hpte_decode. Add
break statement to break out of the switch. The regression is introduced by
dcda287a9b "powerpc/mm: Simplify hpte_decode"
Reported-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Commit 801eb73f45 introduced
a bug while checking PTE flags. We have to drop the _PAGE_COHERENT flag
when __PAGE_NO_CACHE is set and the cache update policy is not write-through
(i.e. _PAGE_WRITETHRU is not set)
Signed-off-by: Denis Kirjanov <kda@linux-powerpc.org>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
CC: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This patch restores serial port operation which has been broken since
commit 60e9357547 ("serial: samsung: enable clock before clearing
pending interrupts during init")
That commit only uncovered the real issue which was missing clkdev
entries for the "uart" clocks on S3C2440. It went unnoticed so far
because return value of clk API calls were not being checked at all
in the samsung serial port driver.
This patch should be backported to at least 3.10 stable kernel, since
the serial port has not been working on s3c2440 since 3.10-rc5.
Cc: Chander Kashyap <chander.kashyap@linaro.org>
Signed-off-by: Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
[on S3C2440 SoC based Mini2440 board]
Tested-by: Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Tested-by: Juergen Beisert <jbe@pengutronix.de>
Cc: <stable@vger.kernel.org> [3.10]
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
The patch introduces flag EEH_DEV_SYSFS to keep track that the sysfs
entries for the corresponding EEH device (then PCI device) has been
added or removed, in order to avoid race condition.
Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
While restoring BARs for one specific PCI device, the pci_dev
instance should have been released. So it's not reliable to use
the pci_dev instance on restoring BARs. However, we still need
some information (e.g. PCIe capability position, header type) from
the pci_dev instance. So we have to store those information to
EEH device in advance.
Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
When EEH error happens to one specific PE, some devices with drivers
supporting EEH won't except hotplug on the device. However, there
might have other deivces without driver, or with driver without EEH
support. For the case, we need do partial hotplug in order to make
sure that the PE becomes absolutely quite during reset. Otherise,
the PE reset might fail and leads to failure of error recovery.
The current code doesn't handle that 'mixed' case properly, it either
uses the error callbacks to the drivers, or tries hotplug, but doesn't
handle a PE (EEH domain) composed of a combination of the two.
The patch intends to support so-called "partial" hotplug for EEH:
Before we do reset, we stop and remove those PCI devices without
EEH sensitive driver. The corresponding EEH devices are not detached
from its PE, but with special flag. After the reset is done, those
EEH devices with the special flag will be scanned one by one.
Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
When EEH error happens to one specific PE, the device drivers
of its attached EEH devices (PCI devices) are checked to see
the further action: reset with complete hotplug, or reset without
hotplug. However, that's not enough for those PCI devices whose
drivers can't support EEH, or those PCI devices without driver.
So we need do so-called "partial hotplug" on basis of PCI devices.
In the situation, part of PCI devices of the specific PE are
unplugged and plugged again after PE reset.
The patch changes pcibios_add_pci_devices() so that it can support
full hotplug and so-called "partial" hotplug based on device-tree
or real hardware. It's notable that pci_of_scan.c has been changed
for a bit in order to support the "partial" hotplug based on dev-tree.
Most of the generic code already supports that, we just need to
plumb it properly on our side.
Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Currently, we're trasversing the EEH devices list using list_for_each_entry().
That's not safe enough because the EEH devices might be removed from
its parent PE while doing iteration. The patch replaces that with
list_for_each_entry_safe().
Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
When we do normal hotplug, the PE (shadow EEH structure) shouldn't be
kept around.
However, we need to keep it if the hotplug an artifial one caused by
EEH errors recovery.
Since we remove EEH device through the PCI hook pcibios_release_device(),
the flag "purge_pe" passed to various functions is meaningless. So the patch
removes the meaningless flag and introduce new flag "EEH_PE_KEEP"
to save the PE while doing hotplug during EEH error recovery.
Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Make some functions public in order to support hotplug on either specific
PCI bus or PCI device in future.
Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
We will rely on pcibios_release_device() to remove the EEH cache
and unbind EEH device for the specific PCI device. So we shouldn't
hold the reference to the PCI device from EEH cache and EEH device.
Otherwise, pcibios_release_device() won't be called as we expected.
The patch removes the reference to the PCI device in EEH core.
Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
During Machine Check interrupt on pseries platform, R3 generally points to
memory region inside RTAS (FWNMI) area. We see r3 corruption because when RTAS
delivers the machine check exception it passes the address inside FWNMI area
with the top most bit set. This patch fixes this issue by masking top two bit
in machine check exception handler.
Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
The presence or absence of EBB is advertised to userspace via the presence
or absence of PPC_FEATURE2_EBB in cpu_user_features2.
Because the kernel can be built without PMU support, we should only add
PPC_FEATURE2_EBB to cpu_user_features2 when we successfully register the
power8 PMU support.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
The Kconfig symbol HOTPLUG was removed with commit 40b313608a ("Finally
eradicate CONFIG_HOTPLUG"). But there's still one select statement for
that symbol. It seems that select statement was added after the patch to
remove CONFIG_HOTPLUG was submitted. Anyhow, it is useless and can be
dropped.
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Reviewed-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
In hard_irq_disable(), we accessed the PACA before we hard disabled
the interrupts, potentially causing a warning as get_paca() will
us debug_smp_processor_id().
Move that to after the disabling, and also use local_paca directly
rather than get_paca() to avoid several redundant and useless checks.
Signed-off-by: Tiejun Chen <tiejun.chen@windriver.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Module CRCs are implemented as absolute symbols that get resolved by
a linker script. We build an intermediate .o that contains an
unresolved symbol for each CRC. genksysms parses this .o, calculates
the CRCs and writes a linker script that "resolves" the symbols to
the calculated CRC.
Unfortunately the ppc64 relocatable kernel sees these CRCs as symbols
that need relocating and relocates them at boot. Commit d4703aef
(module: handle ppc64 relocating kcrctabs when CONFIG_RELOCATABLE=y)
added a hook to reverse the bogus relocations. Part of this patch
created a symbol at 0x0:
# head -2 /proc/kallsyms
0000000000000000 T reloc_start
c000000000000000 T .__start
This reloc_start symbol is causing lots of confusion to perf. It
thinks reloc_start is a massive function that stretches from 0x0 to
0xc000000000000000 and we get various cryptic errors out of perf,
including:
problem incrementing symbol count, skipping event
This patch removes the reloc_start linker script label and instead
defines it as PHYSICAL_START. We also need to wrap it with
CONFIG_PPC64 because the ppc32 kernel can set a non zero
PHYSICAL_START at compile time and we wouldn't want to subtract
it from the CRCs in that case.
Signed-off-by: Anton Blanchard <anton@samba.org>
Cc: <stable@kernel.org>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
POWER8 comes with two different PVRs. This patch enables the additional
PVR in the cputable.
The existing entry (PVR=0x4b) is renamed to POWER8E and the new entry
(PVR=0x4d) is given POWER8.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Pull alpha architecture fixes from Matt Turner:
"This contains mostly clean ups and fixes but also an implementation of
atomic64_dec_if_positive() and a pair of new syscalls"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mattst88/alpha:
alpha: Use handle_percpu_irq for the timer interrupt
alpha: Force the user-visible HZ to a constant 1024.
alpha: Don't if-out dp264_device_interrupt.
alpha: Use __builtin_alpha_rpcc
alpha: Fix type compatibility warning for marvel_map_irq
alpha: Generate dwarf2 unwind info for various kernel entry points.
alpha: Implement atomic64_dec_if_positive
alpha: Improve atomic_add_unless
alpha: Modernize lib/mpi/longlong.h
alpha: Add kcmp and finit_module syscalls
alpha: locks: remove unused arch_*_relax operations
alpha: kernel: typo issue, using '1' instead of '11'
alpha: kernel: using memcpy() instead of strcpy()
alpha: Convert print_symbol to %pSR
CONFIG_USB_EHCI_MXC selects the old i.mx USB driver, which does not support
device tree.
Select the USB chipidea driver instead, so that USB can be functional on i.mx.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
The em_x270_mci_setpower() and em_x270_usb_hub_init() functions
call regulator_enable(), which may return an error that must
be checked.
This changes the em_x270_usb_hub_init() function to bail out
if it fails, and changes the pxamci_platform_data->setpower
callback so that the a failed em_x270_mci_setpower call
can be propagated by the pxamci driver into the mmc core.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Mike Rapoport <mike@compulab.co.il>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Haojian Zhuang <haojian.zhuang@gmail.com>
Acked-by: Chris Ball <cjb@laptop.org>
[olof: fixed order of regulator_enable() and test in em_x270_usb_hub_init]
Signed-off-by: Olof Johansson <olof@lixom.net>
Fix the following compilation warning:
arch/arm/mach-zynq/common.c:110:2: warning: initialization from incompatible pointer type [enabled by default]
arch/arm/mach-zynq/common.c:110:2: warning: (near initialization for ‘__mach_desc_XILINX_EP107.restart’) [enabled by default]
Signed-off-by: Vincent Stehlé <vincent.stehle@freescale.com>
Cc: Robin Holt <holt@sgi.com>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: trivial@kernel.org
Signed-off-by: Olof Johansson <olof@lixom.net>
Fix the following compilation warning:
arch/arm/mach-keystone/keystone.c:74:2: warning: initialization from incompatible pointer type [enabled by default]
arch/arm/mach-keystone/keystone.c:74:2: warning: (near initialization for ‘__mach_desc_KEYSTONE.restart’) [enabled by default]
Signed-off-by: Vincent Stehlé <vincent.stehle@freescale.com>
Cc: Robin Holt <holt@sgi.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: trivial@kernel.org
Signed-off-by: Olof Johansson <olof@lixom.net>
Commit 7b6d864b48 (reboot: arm: change reboot_mode to use enum
reboot_mode) and ff701306cd (arm64: use common reboot infrastructure)
change the prototype of arm_pm_restart on arm and arm64.
Update xen_restart accordingly.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
For modern CPUs, perf clock is directly related to TSC. TSC
can be calculated from perf clock and vice versa using a simple
calculation. Two of the three componenets of that calculation
are already exported in struct perf_event_mmap_page. This patch
exports the third.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Link: http://lkml.kernel.org/r/1372425741-1676-3-git-send-email-adrian.hunter@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Commit ff70130 (arm64: use common reboot infrastructure) converted the
arm_pm_restart declaration to the new reboot infrastructure but missed
the actual definition.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Secondary CPUs write to __boot_cpu_mode with caches disabled, and thus a
cached value of __boot_cpu_mode may be incoherent with that in memory.
This could lead to a failure to detect mismatched boot modes.
This patch adds flushing to ensure that writes by secondaries to
__boot_cpu_mode are made visible before we test against it.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Christoffer Dall <cdall@cs.columbia.edu>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Recently we added an early quirk to detect 5500/5520 chipsets
with early revisions that had problems with irq draining with
interrupt remapping enabled:
commit 03bbcb2e7e
Author: Neil Horman <nhorman@tuxdriver.com>
Date: Tue Apr 16 16:38:32 2013 -0400
iommu/vt-d: add quirk for broken interrupt remapping on 55XX chipsets
It turns out this same problem is present in the intel X58
chipset as well. See errata 69 here:
http://www.intel.com/content/www/us/en/chipsets/x58-express-specification-update.html
This patch extends the pci early quirk so that the chip
devices/revisions specified in the above update are also covered
in the same way:
Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Donald Dutile <ddutile@redhat.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: Malcolm Crossley <malcolm.crossley@citrix.com>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/1374059639-8631-1-git-send-email-nhorman@tuxdriver.com
[ Small edits. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Commit 3fe26fa ("x86: get rid of pt_regs argument in sigreturn variants",
from 2012-11-12) changed the body of PTREGSCALL to drop arg, and
updated the callsites; unfortunately, it forgot to update the
macro argument list, leaving an unused argument. Fix this.
Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Link: http://lkml.kernel.org/r/1373479468-7175-1-git-send-email-artagnon@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
In fd4363fff3 ("x86: Introduce int3 (breakpoint)-based
instruction patching"), the mechanism that was introduced for
notifying alternatives code from int3 exception handler that and
exception occured was die_notifier.
This is however problematic, as early code might be using jump
labels even before the notifier registration has been performed,
which will then lead to an oops due to unhandled exception. One
of such occurences has been encountered by Fengguang:
int3: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
Modules linked in:
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 3.11.0-rc1-01429-g04bf576 #8
task: ffff88000da1b040 ti: ffff88000da1c000 task.ti: ffff88000da1c000
RIP: 0010:[<ffffffff811098cc>] [<ffffffff811098cc>] ttwu_do_wakeup+0x28/0x225
RSP: 0000:ffff88000dd03f10 EFLAGS: 00000006
RAX: 0000000000000000 RBX: ffff88000dd12940 RCX: ffffffff81769c40
RDX: 0000000000000002 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffff88000dd03f28 R08: ffffffff8176a8c0 R09: 0000000000000002
R10: ffffffff810ff484 R11: ffff88000dd129e8 R12: ffff88000dbc90c0
R13: ffff88000dbc90c0 R14: ffff88000da1dfd8 R15: ffff88000da1dfd8
FS: 0000000000000000(0000) GS:ffff88000dd00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 00000000ffffffff CR3: 0000000001c88000 CR4: 00000000000006e0
Stack:
ffff88000dd12940 ffff88000dbc90c0 ffff88000da1dfd8 ffff88000dd03f48
ffffffff81109e2b ffff88000dd12940 0000000000000000 ffff88000dd03f68
ffffffff81109e9e 0000000000000000 0000000000012940 ffff88000dd03f98
Call Trace:
<IRQ>
[<ffffffff81109e2b>] ttwu_do_activate.constprop.56+0x6d/0x79
[<ffffffff81109e9e>] sched_ttwu_pending+0x67/0x84
[<ffffffff8110c845>] scheduler_ipi+0x15a/0x2b0
[<ffffffff8104dfb4>] smp_reschedule_interrupt+0x38/0x41
[<ffffffff8173bf5d>] reschedule_interrupt+0x6d/0x80
<EOI>
[<ffffffff810ff484>] ? __atomic_notifier_call_chain+0x5/0xc1
[<ffffffff8105cc30>] ? native_safe_halt+0xd/0x16
[<ffffffff81015f10>] default_idle+0x147/0x282
[<ffffffff81017026>] arch_cpu_idle+0x3d/0x5d
[<ffffffff81127d6a>] cpu_idle_loop+0x46d/0x5db
[<ffffffff81127f5c>] cpu_startup_entry+0x84/0x84
[<ffffffff8104f4f8>] start_secondary+0x3c8/0x3d5
[...]
Fix this by directly calling poke_int3_handler() from the int3
exception handler (analogically to what ftrace has been doing
already), instead of relying on notifier, registration of which
might not have yet been finalized by the time of the first trap.
Reported-and-tested-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: H. Peter Anvin <hpa@linux.intel.com>
Cc: Fengguang Wu <fengguang.wu@intel.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/alpine.LNX.2.00.1307231007490.14024@pobox.suse.cz
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Midway adds new register fields to the coherency control registers, so
writing absolute values will break on Midway. Change the register
accesses to only modify the necessary and common fields in order to
support both Midway and Highbank.
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
- Update the baseline so we need not rely on make
oldconfig so much
- MMC defconfig updates
- Activate NO_HZ_IDLE and HRTIMERS
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Merge tag 'nomadik-defconfig-for-arm-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-nomadik into fixes
From Linus Walleij:
This updates the Nomadik defconfig post-v3.11-rc1:
- Update the baseline so we need not rely on make
oldconfig so much
- MMC defconfig updates
- Activate NO_HZ_IDLE and HRTIMERS
* tag 'nomadik-defconfig-for-arm-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-nomadik:
ARM: nomadik: configure for NO_HZ and HRTIMERS
ARM: nomadik: update defconfig base
ARM: nomadik: Update MMC defconfigs
Signed-off-by: Olof Johansson <olof@lixom.net>
Commit 8ef6e6201b (ARM: footbridge: use
fixed PCI i/o mapping) broke booting on my netwinder. Before that,
everything boots fine. Since then, it crashes on boot.
With earlyprintk, I see it BUG-ing like so:
kernel BUG at lib/ioremap.c:27!
Internal error: Oops - BUG: 0 [#1] ARM
...
[<c0139b54>] (ioremap_page_range+0x128/0x154) from [<c02e6a6c>] (dc21285_setup+0xd0/0x114)
[<c02e6a6c>] (dc21285_setup+0xd0/0x114) from [<c02e4874>] (pci_common_init+0xa0/0x298)
[<c02e4874>] (pci_common_init+0xa0/0x298) from [<c02e793c>] (netwinder_pci_init+0xc/0x18)
[<c02e793c>] (netwinder_pci_init+0xc/0x18) from [<c02e27d0>] (do_one_initcall+0xb4/0x180)
...
Russell points out it's because of overlapping PCI mappings that was
added with the aforementioned commit. Rob thought the code would re-use
the static mapping, but that turns out to not be the case and instead
hits the BUG further down.
After deleting this hunk as suggested by Russel, the system boots up fine
again and all my PCI devices work (IDE, ethernet, the DC21285).
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Cc: stable@vger.kernel.org # v3.5+
Signed-off-by: Olof Johansson <olof@lixom.net>
* A few device tree source fixes regarding pinctrl, clock, and pwm
backlight.
* Fixes imx28 and imx51 audio driver failure caused by sgtl5000 codec
driver change by supplying the correct clock for codec.
* imx6q emi_sel clock muxing and imx6q-iomuxc-gpr macro fixes
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Merge tag 'imx-fixes-3.11' of git://git.linaro.org/people/shawnguo/linux-2.6 into fixes
From Shawn Guo, imx fixes for 3.11:
- A few device tree source fixes regarding pinctrl, clock, and pwm
backlight.
- Fixes imx28 and imx51 audio driver failure caused by sgtl5000 codec
driver change by supplying the correct clock for codec.
- imx6q emi_sel clock muxing and imx6q-iomuxc-gpr macro fixes
* tag 'imx-fixes-3.11' of git://git.linaro.org/people/shawnguo/linux-2.6:
ARM: dts: imx51-babbage: Pass a real clock to the codec
ARM i.MX53: mba53: Fix PWM backlight DT node
ARM: imx: fix vf610 enet module clock selection
ARM: mxs: saif0 is the clock provider to sgtl5000
ARM: i.MX6Q: correct emi_sel clock muxing
ARM i.MX6Q: Fix IOMUXC GPR1 defines for ENET_CLK_SEL and IPU1/2_MUX
ARM: i.MX27: Typo fix
ARM: imx27: Fix documentation for SPLL clock
ARM i.MX53: Fix UART pad configuration
From Tony Lindgren:
Omap fixes mostly to deal with the dropping of platform data for omap4,
and to make v7_defconfig bootable on omap4 SDP with nfsroot.
* tag 'omap-for-v3.11/fixes-against-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
ARM: OMAP2+: Provide alias to USB PHY clock
ARM: dts: Add missing vmmc2 regulator for twl
ARM: multi_v7: Enabled omap4430 sdp nfsroot
From Sekhar Nori:
DaVinci fixes for v3.11-rc2
The pull request includes fixes for sparse warnings, defconfig changes to
enable DMA usage on peripherals and removal of a duplicated include file.
* tag 'davinci-fixes-for-v3.11-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/nsekhar/linux-davinci:
ARM: davinci: defconfig: enable EDMA driver
ARM: davinci: make file local variables static
ARM: edma: remove duplicated include from edma.c
Signed-off-by: Olof Johansson <olof@lixom.net>
Some of the ARM_ERRATA selection is not done in the initial SOC support
patches. This patch selects 2 new ARM_ERRATA's and removes one which was
actually fixed.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com>
[olof: reorder new errata entries]
Signed-off-by: Olof Johansson <olof@lixom.net>
This patch fixes a bug in pinctrl setup of serial2 device, Some of the
pins in the pinctrl node of serial2 do not belong to that
pin-controller. This patch divides them in the pins into there
respective pin controller nodes.
Without this patch serial on StiH416-B2000 Board will not work as it
fails with:
"st-pinctrl pin-controller-rear.3: failed to get pin(99) name
st-pinctrl pin-controller-rear.3: maps: function serial2 group serial2-0
num 4
pinconfig core: failed to register map default (3): no group/pin given"
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
In hotplug case (especially with Thunderbolt enabled systems) we might need
to call pcibios_resource_survey_bus() several times for a bus. The function
ends up calling pci_claim_resource() for each bridge resource that then
fails claiming that the resource exists already (which it does). Once this
happens the resource is invalidated thus preventing devices behind the
bridge to allocate their resources.
To fix this we do what has been done in pcibios_allocate_dev_resources()
and check 'parent' of the given resource. If it is non-NULL it means that
the resource has been allocated already and we can skip it. We do the same
for ROM resources as well.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Commit a469abd0f8 ("ARM: elf: add new hwcap for identifying atomic
ldrd/strd instructions") added a new hwcap to identify LPAE on CPUs
which support it. Whilst the hwcap data is correct, the string reported
in /proc/cpuinfo actually matches on HWCAP_VFPD32, which was missing
an entry in the string table.
This patch fixes this problem by adding a "vfpd32" string at the correct
offset, preventing us from falsely advertising LPAE on CPUs which do not
support it.
[will: added commit message]
Acked-by: Will Deacon <will.deacon@arm.com>
Tested-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Tetsuyuki Kobayashi <koba@kmckk.co.jp>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Currently, compare_cpu_mode_with_primary uses a mixture of macro
arguments and hardcoded registers, and does so incorrectly, as it
stores (__boot_cpu_mode_offset | BOOT_CPU_MODE_MISMATCH) to
(__boot_cpu_mode + &__boot_cpu_mode_offset), which could corrupt an
arbitrary portion of memory.
This patch fixes up compare_cpu_mode_with_primary to use the macro
arguments, correctly updating __boot_cpu_mode.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Dave Martin <Dave.Martin@arm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: Christoffer Dall <cdall@cs.columbia.edu>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
When map_lowmem() runs, and processes a memory bank whose start or end
is not section-aligned, memory must be allocated to store the 2nd-level
page tables. Those allocations are made by calling memblock_alloc().
At this point, the only memory that is free *and* mapped is memory which
has already been mapped by map_lowmem() itself. For this reason, we must
calculate the first point at which map_lowmem() will need to allocate
memory, and set the memblock allocation limit to a lower address, so that
memblock_alloc() is guaranteed to return memory that is already mapped.
This patch enhances sanity_check_meminfo() to calculate that memory
address, and pass it to memblock_set_current_limit(), rather than just
assuming the limit is arm_lowmem_limit.
The algorithm applied is:
* Default memblock_limit to arm_lowmem_limit in the absence of any other
limit; arm_lowmem_limit is the highest memory that is mapped by
map_lowmem().
* While walking the list of memblocks, if the start of a block is not
aligned, 2nd-level page tables will need to be allocated to map the
first few pages of the block. Hence, the memblock_limit must be before
the start of the block.
* Similarly, if the end of any block is not aligned, 2nd-level page
tables will need to be allocated to map the last few pages of the
block. Hence, the memblock_limit must point at the end of the block,
rounded down to section-alignment.
* The memory blocks are assumed to be sorted in address order, so the
first unaligned block start or end is used to set the limit.
With this algorithm, the start or end of almost any bank can be non-
section-aligned. The only exception is that the start of bank 0 must
be section-aligned, since otherwise memory would need to be allocated
when mapping the start of bank 0, which occurs before any free memory
is mapped.
[swarren, wrote commit description, rewrote calculation of memblock_limit]
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Commit ae8a8b9553 ("ARM: 7691/1: mm: kill unused TLB_CAN_READ_FROM_L1_CACHE
and use ALT_SMP instead") added early function returns for page table
cache flushing operations on ARMv7 SMP CPUs.
Unfortunately, when targetting Thumb-2, these `mov pc, lr' sequences
assemble to 2 bytes which can lead to corruption of the instruction
stream after code patching.
This patch fixes the alternates to use wide (32-bit) instructions for
Thumb-2, therefore ensuring that the patching code works correctly.
Cc: <stable@vger.kernel.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This non-user visible option lacked any kind of documentation. This
is quite common for non-user visible options; certian people can't
understand the point of documenting such options with help text.
However, here we have a case in point: developers don't understand the
option either, as they were thinking that when the option is not set,
the decompressor should produce no output what so ever. This is
incorrect, as the purpose of this option is to control whether a
multiplatform kernel uses the kernel debugging macros to produce
output or not.
So let's document this via help rather than commentry to prevent others
falling into this misunderstanding.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
CONFIG_ARCH_MEMORY_PROBE enables the
/sys/devices/system/memory/probe interface, which allows a given
memory address to be hot-added as follows:
# echo start_address_of_new_memory > /sys/devices/system/memory/probe
(See Documentation/memory-hotplug.txt for more details.)
This probe interface is required on powerpc. On x86, however,
ACPI notifies a memory hotplug event to the kernel, which
performs its hotplug operation as the result.
Therefore, regular users do not need this interface on x86. This probe
interface is also error-prone and misleading that the kernel blindly
adds a given memory address without checking if the memory is present
on the system; no probing is done despite of its name.
The kernel crashes when a user requests to online a memory block
that is not present on the system. This interface is currently
used for testing as it can fake a hotplug event.
This patch disables CONFIG_ARCH_MEMORY_PROBE by default on x86,
adds its Kconfig menu entry on x86, and clarifies its use in
Documentation/ memory-hotplug.txt.
Signed-off-by: Toshi Kani <toshi.kani@hp.com>
Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: linux-mm@kvack.org
Cc: dave@sr71.net
Cc: isimatu.yasuaki@jp.fujitsu.com
Cc: tangchen@cn.fujitsu.com
Cc: vasilis.liaskovitis@profitbricks.com
Link: http://lkml.kernel.org/r/1374256068-26016-1-git-send-email-toshi.kani@hp.com
[ Edited it slightly. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
in drivers/pinctrl/sirf, pingroup name is cko0 and cko1, but in dts, they
are cko0 and cko1_rst. this patch fixes the error in dts.
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
this patch adds the lost pin group which supports to let USP0 to simulate
a UART without hardware flow control.
Signed-off-by: Qipan Li <Qipan.Li@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Enable MMC_UNSAFE_RESUME to accomplish a proper suspend/resume cycle
for SD/SDIO/(e)MMC.
ARMMMCI host driver supports clock gating through runtime PM, thus
MMC_CLKGATE is not needed. Moreover ARMMMCI can do scatter-gather which
means we can explicity disable MMC_BLOCK_BOUNCE, since it's default
enabled, to skip unnecessary bounce buffer copying.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Pull UML fixes from Richard Weinberger:
"Special thanks goes to Toralf Föster for continuously testing UML and
reporting issues!"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml:
um: remove dead code
um: siginfo cleanup
uml: Fix which_tmpdir failure when /dev/shm is a symlink, and in other edge cases
um: Fix wait_stub_done() error handling
um: Mark stub pages mapping with VM_PFNMAP
um: Fix return value of strnlen_user()
Pull MIPS fixes from Ralf Baechle:
"MIPS fixes for 3.11. Half of then is for Netlogic the remainder
touches things across arch/mips.
Nothing really dramatic and by rc1 standards MIPS will be in fairly
good shape with this applied. Tested by building all MIPS defconfigs
of which with this pull request four platforms won't build. And yes,
it boots also on my favorite test systems"
* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
MIPS: kvm: Kconfig: Drop HAVE_KVM dependency from VIRTUALIZATION
MIPS: Octeon: Fix DT pruning bug with pip ports
MIPS: KVM: Mark KVM_GUEST (T&E KVM) as BROKEN_ON_SMP
MIPS: tlbex: fix broken build in v3.11-rc1
MIPS: Netlogic: Add XLP PIC irqdomain
MIPS: Netlogic: Fix USB block's coherent DMA mask
MIPS: tlbex: Fix typo in r3000 tlb store handler
MIPS: BMIPS: Fix thinko to release slave TP from reset
MIPS: Delete dead invocation of exception_exit().
- Fixes (user cache maintenance fault handling, !COMPAT compilation, CPU
online and interrupt hanlding).
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Merge tag 'arm64-stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64
Pull arm64 fixes from Catalin Marinas:
- Post -rc1 update to the common reboot infrastructure.
- Fixes (user cache maintenance fault handling, !COMPAT compilation,
CPU online and interrupt hanlding).
* tag 'arm64-stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64:
arm64: use common reboot infrastructure
arm64: mm: don't treat user cache maintenance faults as writes
arm64: add '#ifdef CONFIG_COMPAT' for aarch32_break_handler()
arm64: Only enable local interrupts after the CPU is marked online
Pull s390 fixes from Martin Schwidefsky:
"An update for the BFP jit to the latest and greatest, two patches to
get kdump working again, the random-abort ptrace extention for
transactional execution, the z90crypt module alias for ap and a tiny
cleanup"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390/zcrypt: Alias for new zcrypt device driver base module
s390/kdump: Allow copy_oldmem_page() copy to virtual memory
s390/kdump: Disable mmap for s390
s390/bpf,jit: add pkt_type support
s390/bpf,jit: address randomize and write protect jit code
s390/bpf,jit: use generic jit dumper
s390/bpf,jit: call module_free() from any context
s390/qdio: remove unused variable
s390/ptrace: PTRACE_TE_ABORT_RAND
This kernel/user split was done long ago for other architectures.
Signed-off-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
The code as written is correct, and will be used by QEMU emulation.
Signed-off-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
