Several tests that rely on implicit build rules fail to build,
when invoked from the main Makefile kselftest target. These
failures are due to --no-builtin-rules and --no-builtin-variables
options set in the inherited MAKEFLAGS.
--no-builtin-rules eliminates the use of built-in implicit rules
and --no-builtin-variables is for not defining built-in variables.
These two options override the use of implicit rules resulting in
build failures. In addition, inherited LDFLAGS result in build
failures and there is no need to define LDFLAGS. Clear LDFLAGS
and MAKEFLAG when make is invoked from the main Makefile kselftest
target. Fixing this at selftests Makefile avoids changing the main
Makefile and keeps this change self contained at selftests level.
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
selftests/exec: Check if the syscall exists and bail if not
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Merge tag 'linux-kselftest-4.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
Pull Kselftest fix from Shuah Khan:
"selftests/exec: Check if the syscall exists and bail if not"
* tag 'linux-kselftest-4.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
selftests/exec: Check if the syscall exists and bail if not
This reverts commit 5c1de006e8.
While the original commit makes it easier to run cpupower from the
local build directory, it also leaves the binary with a rather poor
rpath of './' in it after it is installed on a system via 'make install'.
This is considered bad practice and can cause cpupower to fail in
rpmbuild with the following error:
ERROR 0004: file '/usr/bin/cpupower' contains an insecure rpath './' in [./]
error: Bad exit status from /var/tmp/rpm-tmp.A6u26r (%install)
Bad exit status from /var/tmp/rpm-tmp.A6u26r (%install)
Developers should be able to use LD_LIBRARY_PATH to achieve the same
effect and not introduce rpath into the binary.
Signed-off-by: Josh Boyer <jwboyer@feoraproject.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
On systems which don't implement sys_execveat(), this test produces a
lot of output.
Add a check at the beginning to see if the syscall is present, and if
not just note one error and return.
When we run on a system that doesn't implement the syscall we will get
ENOSYS back from the kernel, so change the logic that handles
__NR_execveat not being defined to also use ENOSYS rather than -ENOSYS.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: David Drysdale <drysdale@google.com>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
When annotating source/disasm lines the perf tools parse the output of
objdump, trying to provide augmented output that allows navigating
jumps, calls, etc.
But when a line output by objdump can't be parsed the annotation code
falls back to just presenting the unparsed line.
When fixing a leak in the 0fb9f2aab7 commit ("perf annotate: Fix
memory leaks in LOCK handling") we failed to take that into account and
instead tried to free one of the data structures that should be freed
only when successfully allocated, oops, segfault.
There was a change in the way the objdump output for lock prefixed
instructions is formatted that lead the relevant parser to fail to grok
it.
At least RHEL7 works ok, but Fedora 20 segfaults.
Fix it by making the ins__delete() destructor work like the most basic
destructor: free().
Namely make it accept a NULL pointer and when handling it just do
nothing.
Further investigation is needed to figure out the nature of the objdump
output change so as to make the parser grok it.
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Rabin Vincent <rabin@rab.in>
Link: http://lkml.kernel.org/n/tip-7wsy0zo292pif0yjoqpfryrz@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Pull thermal management fixes from Eduardo Valentin:
"Specifics:
- Several fixes in tmon tool.
- Fixes in intel int340x for _ART and _TRT tables.
- Add id for Avoton SoC into powerclamp driver.
- Fixes in RCAR thermal driver to remove race conditions and fix fail
path
- Fixes in TI thermal driver: removal of unnecessary code and build
fix if !CONFIG_PM_SLEEP
- Cleanups in exynos thermal driver
- Add stubs for include/linux/thermal.h. Now drivers using thermal
calls but that also work without CONFIG_THERMAL will be able to
compile for systems that don't care about thermal.
Note: I am sending this pull on Rui's behalf while he fixes issues in
his Linux box"
* 'fixes-for-4.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal:
thermal: int340x_thermal: Ignore missing _ART, _TRT tables
thermal/intel_powerclamp: add id for Avoton SoC
tools/thermal: tmon: silence 'set but not used' warnings
tools/thermal: tmon: use pkg-config to determine library dependencies
tools/thermal: tmon: support cross-compiling
tools/thermal: tmon: add .gitignore
tools/thermal: tmon: fixup tui windowing calculations
tools/thermal: tmon: tui: don't hard-code dialog window size assumptions
tools/thermal: tmon: add min/max macros
tools/thermal: tmon: add --target-temp parameter
thermal: exynos: Clean-up code to use oneline entry for exynos compatible table
thermal: rcar: Make error and remove paths symmetrical with init
thermal: rcar: Fix race condition between init and interrupt
thermal: Introduce dummy functions when thermal is not defined
ti-soc-thermal: Delete an unnecessary check before the function call "cpufreq_cooling_unregister"
thermal: ti-soc-thermal: bandgap: Fix build warning if !CONFIG_PM_SLEEP
Pull perf fixes from Ingo Molnar:
"Two kprobes fixes and a handful of tooling fixes"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf tools: Make sparc64 arch point to sparc
perf symbols: Define EM_AARCH64 for older OSes
perf top: Fix SIGBUS on sparc64
perf tools: Fix probing for PERF_FLAG_FD_CLOEXEC flag
perf tools: Fix pthread_attr_setaffinity_np build error
perf tools: Define _GNU_SOURCE on pthread_attr_setaffinity_np feature check
perf bench: Fix order of arguments to memcpy_alloc_mem
kprobes/x86: Check for invalid ftrace location in __recover_probed_insn()
kprobes/x86: Use 5-byte NOP when the code might be modified by ftrace
gcc complains about the 'cols' variable being unused. This is
unavoidable, given the ncurses getmaxyx() macro-based API, which wants
to assign to a variable directly, even when we're not going to use it.
Warning:
gcc -O1 -Wall -Wshadow -W -Wformat -Wimplicit-function-declaration -Wimplicit-int -fstack-protector -D VERSION=\"1.0\" -c -o tui.o tui.c
tui.c: In function ‘show_dialogue’:
tui.c:288:12: warning: variable ‘cols’ set but not used [-Wunused-but-set-variable]
int rows, cols;
^
So, add a hack to get rid of that warning.
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Some distros (e.g., Arch Linux) don't package the tinfo library
separately from ncurses, so don't unconditionally include it. Instead,
use pkg-config.
The $(STATIC) ugliness is to handle the reported build case from commit
6b533269fb ("tools/thermal: tmon: fix compilation errors when building
statically"), where a developer wants to be able to build with:
make LDFLAGS=-static
which requires an additional pkg-config flag.
Finally, support a lowest common denominator fallback (-lpanel
-lncurses) for build systems that don't have pkg-config entries for
ncurses.
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
We might want to prepare CFLAGS outside of this Makefile, so don't
overwrite its initial value.
Then, support $(CROSS_COMPILE), so we can use a cross-compile toolchain.
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
The number of rows in the dialog vary according to the number of cooling
devices. However, some of the windowing computations were assuming a
fixed number of rows. This computation is OK when we have between 4 and
9 cooling devices (and they wrap to the next column), but with fewer
devices, we end up printing off the end of the window.
This unifies the row computation into a single function and uses that
throughout the TUI code. This also accounts for increasing the number of
rows when there are more than 9 total cooling devices.
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
We can use the ncurses API to get the number of rows.
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
If we launch in daemon mode (--daemon), we don't have the ncurses UI,
but we might want to set the target temperature still. For example,
someone might stick the following in their boot script:
tmon --control intel_powerclamp --target-temp 90 --log --daemon
This would turn on CPU idle injection when we're around 90 degrees
celsius, and would log temperature and throttling info to
/var/tmp/tmon.log.
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
The recent build changes cause perf to not compile for sparc64 since the
arch/sparc64/Build file does not exist:
/home/dahern/kernels/linux.git/tools/build/Makefile.build:40: arch/sparc64/Build: No such file or directory
Fix by converting the sparc64 RAW_ARCH to sparc ARCH -- similar to what
is done for x86_64.
Signed-off-by: David Ahern <david.ahern@oracle.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/1424306222-96843-1-git-send-email-david.ahern@oracle.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
4886f2ca19 added an arm-64 check, but the EM_AARCH64 macro is not
defined in older releases (e.g., RHEL6). Define if it is not defined.
Signed-off-by: David Ahern <david.ahern@oracle.com>
Cc: Victor Kamensky <victor.kamensky@linaro.org>
Link: http://lkml.kernel.org/r/1424306017-96797-1-git-send-email-david.ahern@oracle.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
perf-top is terminating due to SIGBUS on sparc64. git bisect points to:
commit 8239698603
Author: Arnaldo Carvalho de Melo <acme@redhat.com>
Date: Mon Sep 8 13:26:35 2014 -0300
perf evlist: Refcount mmaps
We need to know how many fds are using a perf mmap via
PERF_EVENT_IOC_SET_OUTPUT, so that we can know when to ditch an mmap,
refcount it.
This commit added 'int refcnt' to struct perf_mmap and the addition makes the
event_copy element no longer 8-byte aligned.
Fix by adding __attribute__((aligned(8))) to the event_copy struct
member.
Signed-off-by: David Ahern <david.ahern@oracle.com>
Link: http://lkml.kernel.org/r/1424304198-92028-1-git-send-email-david.ahern@oracle.com
[ Switched from 'int pad;' to using __attribute__, David tested/acked that ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Commit f6edb53c49 converted the probe to
a CPU wide event first (pid == -1). For kernels that do not support
the PERF_FLAG_FD_CLOEXEC flag the probe fails with EINVAL. Since this
errno is not handled pid is not reset to 0 and the subsequent use of
pid = -1 as an argument brings in an additional failure path if
perf_event_paranoid > 0:
$ perf record -- sleep 1
perf_event_open(..., 0) failed unexpectedly with error 13 (Permission denied)
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.007 MB /tmp/perf.data (11 samples) ]
Also, ensure the fd of the confirmation check is closed and comment why
pid = -1 is used.
Needs to go to 3.18 stable tree as well.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Based-on-patch-by: David Ahern <david.ahern@oracle.com>
Acked-by: David Ahern <david.ahern@oracle.com>
Cc: David Ahern <dsahern@gmail.com>
Link: http://lkml.kernel.org/r/54EC610C.8000403@intel.com
Cc: stable@vger.kernel.org # v3.18+
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Feature detection for pthread_attr_setaffinity_np was failing, producing
this error:
In file included from bench/futex-hash.c:17:0:
bench/futex.h:73:19: error: conflicting types for ‘pthread_attr_setaffinity_np’
static inline int pthread_attr_setaffinity_np(pthread_attr_t *attr,
^
In file included from bench/futex.h:72:0,
from bench/futex-hash.c:17:
/usr/include/pthread.h:407:12: note: previous declaration of ‘pthread_attr_setaffinity_np’ was here
extern int pthread_attr_setaffinity_np (pthread_attr_t *__attr,
^
make[3]: *** [bench/futex-hash.o] Error 1
make[2]: *** [bench] Error 2
make[2]: *** Waiting for unfinished jobs....
This was because compiling test-pthread-attr-setaffinity-np.c
failed due to the function arguments:
test-pthread-attr-setaffinity-np.c: In function ‘main’:
test-pthread-attr-setaffinity-np.c:11:2: warning: null argument where non-null required (argument 3) [-Wnonnull]
ret = pthread_attr_setaffinity_np(&thread_attr, 0, NULL);
^
So fix the arguments.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Stephane Eranian <eranian@google.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/1424774766-24194-1-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
The man page for pthread_attr_set_affinity_np states that _GNU_SOURCE
must be defined before pthread.h is included in order to get the proper
function declaration. Define this in the Makefile.
Without this defined, the feature check fails on a Fedora system with
gcc5 and then the perf build later fails with conflicting prototypes for
the function.
Signed-off-by: Josh Boyer <jwboyer@fedoraproject.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Vineet Gupta <Vineet.Gupta1@synopsys.com>
Link: http://lkml.kernel.org/r/20150211162404.GA15522@hansolo.redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This was causing the destination instead of the source to be filled. As
a result, the source was typically all mapped to one zero page, and
hence very cacheable.
Signed-off-by: Bruce Merry <bmerry@ska.ac.za>
Acked-by: Ingo Molnar <mingo@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20150115092022.GA11292@kryton
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
On top of tht is the major rework of lguest, to use PCI and virtio 1.0, to
double-check the implementation.
Then comes the inevitable fixes and cleanups from that work.
Thanks,
Rusty.
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Merge tag 'virtio-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux
Pull virtio updates from Rusty Russell:
"OK, this has the big virtio 1.0 implementation, as specified by OASIS.
On top of tht is the major rework of lguest, to use PCI and virtio
1.0, to double-check the implementation.
Then comes the inevitable fixes and cleanups from that work"
* tag 'virtio-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: (80 commits)
virtio: don't set VIRTIO_CONFIG_S_DRIVER_OK twice.
virtio_net: unconditionally define struct virtio_net_hdr_v1.
tools/lguest: don't use legacy definitions for net device in example launcher.
virtio: Don't expose legacy net features when VIRTIO_NET_NO_LEGACY defined.
tools/lguest: use common error macros in the example launcher.
tools/lguest: give virtqueues names for better error messages
tools/lguest: more documentation and checking of virtio 1.0 compliance.
lguest: don't look in console features to find emerg_wr.
tools/lguest: don't start devices until DRIVER_OK status set.
tools/lguest: handle indirect partway through chain.
tools/lguest: insert driver references from the 1.0 spec (4.1 Virtio Over PCI)
tools/lguest: insert device references from the 1.0 spec (4.1 Virtio Over PCI)
tools/lguest: rename virtio_pci_cfg_cap field to match spec.
tools/lguest: fix features_accepted logic in example launcher.
tools/lguest: handle device reset correctly in example launcher.
virtual: Documentation: simplify and generalize paravirt_ops.txt
lguest: remove NOTIFY call and eventfd facility.
lguest: remove NOTIFY facility from demonstration launcher.
lguest: use the PCI console device's emerg_wr for early boot messages.
lguest: always put console in PCI slot #1.
...
Here's the big char/misc driver update for 3.20-rc1.
Lots of little things in here, all described in the changelog. Nothing
major or unusual, except maybe the binder selinux stuff, which was all
acked by the proper selinux people and they thought it best to come
through this tree.
All of this has been in linux-next with no reported issues for a while.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-3.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char / misc patches from Greg KH:
"Here's the big char/misc driver update for 3.20-rc1.
Lots of little things in here, all described in the changelog.
Nothing major or unusual, except maybe the binder selinux stuff, which
was all acked by the proper selinux people and they thought it best to
come through this tree.
All of this has been in linux-next with no reported issues for a while"
* tag 'char-misc-3.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (90 commits)
coresight: fix function etm_writel_cp14() parameter order
coresight-etm: remove check for unknown Kconfig macro
coresight: fixing CPU hwid lookup in device tree
coresight: remove the unnecessary function coresight_is_bit_set()
coresight: fix the debug AMBA bus name
coresight: remove the extra spaces
coresight: fix the link between orphan connection and newly added device
coresight: remove the unnecessary replicator property
coresight: fix the replicator subtype value
pdfdocs: Fix 'make pdfdocs' failure for 'uio-howto.tmpl'
mcb: Fix error path of mcb_pci_probe
virtio/console: verify device has config space
ti-st: clean up data types (fix harmless memory corruption)
mei: me: release hw from reset only during the reset flow
mei: mask interrupt set bit on clean reset bit
extcon: max77693: Constify struct regmap_config
extcon: adc-jack: Release IIO channel on driver remove
extcon: Remove duplicated include from extcon-class.c
Drivers: hv: vmbus: hv_process_timer_expiration() can be static
Drivers: hv: vmbus: serialize Offer and Rescind offer
...
Here's the big pull request for the USB driver tree for 3.20-rc1.
Nothing major happening here, just lots of gadget driver updates, new
device ids, and a bunch of cleanups.
All of these have been in linux-next for a while with no reported
issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-3.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB patches from Greg KH:
"Here's the big pull request for the USB driver tree for 3.20-rc1.
Nothing major happening here, just lots of gadget driver updates, new
device ids, and a bunch of cleanups.
All of these have been in linux-next for a while with no reported
issues"
* tag 'usb-3.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (299 commits)
usb: musb: fix device hotplug behind hub
usb: dwc2: Fix a bug in reading the endpoint directions from reg.
staging: emxx_udc: fix the build error
usb: Retry port status check on resume to work around RH bugs
Revert "usb: Reset USB-3 devices on USB-3 link bounce"
uhci-hub: use HUB_CHAR_*
usb: kconfig: replace PPC_OF with PPC
ehci-pci: disable for Intel MID platforms (update)
usb: gadget: Kconfig: use bool instead of boolean
usb: musb: blackfin: remove incorrect __exit_p()
USB: fix use-after-free bug in usb_hcd_unlink_urb()
ehci-pci: disable for Intel MID platforms
usb: host: pci_quirks: joing string literals
USB: add flag for HCDs that can't receive wakeup requests (isp1760-hcd)
USB: usbfs: allow URBs to be reaped after disconnection
cdc-acm: kill unnecessary messages
cdc-acm: add sanity checks
usb: phy: phy-generic: Fix USB PHY gpio reset
usb: dwc2: fix USB core dependencies
usb: renesas_usbhs: fix NULL pointer dereference in dma_release_channel()
...
- Revert two ACPI EC driver commits, one that broke system suspend
on Acer Aspire S5 and one that depends on it (Rafael J Wysocki).
- Fix a typo leading to an incorrect check in the exynos-ppmu devfreq
driver (Dan Carpenter).
- Add support for one more Broadwell CPU model to intel_idle (Len Brown).
- Fix an obscure problem with state transitions related to interrupts
in the speedstep-smi cpufreq driver (Mikulas Patocka).
- Remove some unnecessary messages related to the "out of memory"
condition from the core PM code (Quentin Lambert).
- Update turbostat parameters and documentation, add support for
one more Broadwell CPU model to it and modify it to skip
printing disabled package C-states (Len Brown).
/
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Merge tag 'pm+acpi-3.20-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more ACPI and power management updates from Rafael Wysocki:
"These are two reverts related to system suspend breakage by one of a
recent commits, a fix for a recently introduced bug in devfreq and a
bunch of other things that didn't make it into my previous pull
request, but otherwise are ready to go.
Specifics:
- Revert two ACPI EC driver commits, one that broke system suspend on
Acer Aspire S5 and one that depends on it (Rafael J Wysocki).
- Fix a typo leading to an incorrect check in the exynos-ppmu devfreq
driver (Dan Carpenter).
- Add support for one more Broadwell CPU model to intel_idle (Len Brown).
- Fix an obscure problem with state transitions related to interrupts
in the speedstep-smi cpufreq driver (Mikulas Patocka).
- Remove some unnecessary messages related to the "out of memory"
condition from the core PM code (Quentin Lambert).
- Update turbostat parameters and documentation, add support for one
more Broadwell CPU model to it and modify it to skip printing
disabled package C-states (Len Brown)"
* tag 'pm+acpi-3.20-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
PM / devfreq: event: testing the wrong variable
cpufreq: speedstep-smi: enable interrupts when waiting
PM / OPP / clk: Remove unnecessary OOM message
Revert "ACPI / EC: Add query flushing support"
Revert "ACPI / EC: Add GPE reference counting debugging messages"
tools/power turbostat: support additional Broadwell model
intel_idle: support additional Broadwell model
tools/power turbostat: update parameters, documentation
tools/power turbostat: Skip printing disabled package C-states
Linux doesn't generate these, but it's perfectly valid according to
a close reading of the spec. I opened virtio spec bug VIRTIO-134 to
make this clearer there, too.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
As a demonstration, the lguest launcher is pretty strict, trying to
catch badly behaved drivers. Document this precisely.
A good implementation would *NOT* crash the guest when these happened!
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
There are some (optional) parts we don't implement, but this quotes all
the device requirements from the spec (csd 03, but it should be the same
across all released versions).
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
The next patch will insert many quotes from the virtio 1.0 spec; they
make most sense if we copy the spec.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
The example launcher doesn't reset the queue_enable like the spec says
we have to. Plus, we should reset the size in case they negotiated
a different (smaller) one.
This is easy to test by unloading and reloading a virtio module.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
o Added timings to various parts of the test (build, install,
boot, tests) and report them so that the users can keep
track of changes.
o Josh Poimboeuf fixed the console output to work better with
virtual machine targets.
o Various clean ups and fixes
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Merge tag 'ktest-v3.20' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-ktest
Pull ktest updates from Steven Rostedt:
"The following ktest updates were done:
o Added timings to various parts of the test (build, install, boot,
tests) and report them so that the users can keep track of changes.
o Josh Poimboeuf fixed the console output to work better with virtual
machine targets.
o Various clean ups and fixes"
* tag 'ktest-v3.20' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-ktest:
ktest: Place quotes around item variable
ktest: Cleanup terminal on dodie() failure
ktest: Print build,install,boot,test times at success and failure
ktest: Enable user input to the console
ktest: Give console process a dedicated tty
ktest: Rename start_monitor_and_boot to start_monitor_and_install
ktest: Show times for build, install, boot and test
ktest: Restore tty settings after closing console
ktest: Add timings for commands
Merge second set of updates from Andrew Morton:
"More of MM"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (83 commits)
mm/nommu.c: fix arithmetic overflow in __vm_enough_memory()
mm/mmap.c: fix arithmetic overflow in __vm_enough_memory()
vmstat: Reduce time interval to stat update on idle cpu
mm/page_owner.c: remove unnecessary stack_trace field
Documentation/filesystems/proc.txt: describe /proc/<pid>/map_files
mm: incorporate read-only pages into transparent huge pages
vmstat: do not use deferrable delayed work for vmstat_update
mm: more aggressive page stealing for UNMOVABLE allocations
mm: always steal split buddies in fallback allocations
mm: when stealing freepages, also take pages created by splitting buddy page
mincore: apply page table walker on do_mincore()
mm: /proc/pid/clear_refs: avoid split_huge_page()
mm: pagewalk: fix misbehavior of walk_page_range for vma(VM_PFNMAP)
mempolicy: apply page table walker on queue_pages_range()
arch/powerpc/mm/subpage-prot.c: use walk->vma and walk_page_vma()
memcg: cleanup preparation for page table walk
numa_maps: remove numa_maps->vma
numa_maps: fix typo in gather_hugetbl_stats
pagemap: use walk->vma instead of calling find_vma()
clear_refs: remove clear_refs_private->vma and introduce clear_refs_test_walk()
...
Including:
- Update of all defconfigs
- Addition of a bunch of config options to modernise our defconfigs
- Some PS3 updates from Geoff
- Optimised memcmp for 64 bit from Anton
- Fix for kprobes that allows 'perf probe' to work from Naveen
- Several cxl updates from Ian & Ryan
- Expanded support for the '24x7' PMU from Cody & Sukadev
- Freescale updates from Scott:
"Highlights include 8xx optimizations, some more work on datapath device
tree content, e300 machine check support, t1040 corenet error reporting,
and various cleanups and fixes."
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Merge tag 'powerpc-3.20-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux
Pull powerpc updates from Michael Ellerman:
- Update of all defconfigs
- Addition of a bunch of config options to modernise our defconfigs
- Some PS3 updates from Geoff
- Optimised memcmp for 64 bit from Anton
- Fix for kprobes that allows 'perf probe' to work from Naveen
- Several cxl updates from Ian & Ryan
- Expanded support for the '24x7' PMU from Cody & Sukadev
- Freescale updates from Scott:
"Highlights include 8xx optimizations, some more work on datapath
device tree content, e300 machine check support, t1040 corenet
error reporting, and various cleanups and fixes"
* tag 'powerpc-3.20-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux: (102 commits)
cxl: Add missing return statement after handling AFU errror
cxl: Fail AFU initialisation if an invalid configuration record is found
cxl: Export optional AFU configuration record in sysfs
powerpc/mm: Warn on flushing tlb page in kernel context
powerpc/powernv: Add OPAL soft-poweroff routine
powerpc/perf/hv-24x7: Document sysfs event description entries
powerpc/perf/hv-gpci: add the remaining gpci requests
powerpc/perf/{hv-gpci, hv-common}: generate requests with counters annotated
powerpc/perf/hv-24x7: parse catalog and populate sysfs with events
perf: define EVENT_DEFINE_RANGE_FORMAT_LITE helper
perf: add PMU_EVENT_ATTR_STRING() helper
perf: provide sysfs_show for struct perf_pmu_events_attr
powerpc/kernel: Avoid initializing device-tree pointer twice
powerpc: Remove old compile time disabled syscall tracing code
powerpc/kernel: Make syscall_exit a local label
cxl: Fix device_node reference counting
powerpc/mm: bail out early when flushing TLB page
powerpc: defconfigs: add MTD_SPI_NOR (new dependency for M25P80)
perf/powerpc: reset event hw state when adding it to the PMU
powerpc/qe: Use strlcpy()
...
Add KPF_ZERO_PAGE flag for zero_page, so that userspace processes can
detect zero_page in /proc/kpageflags, and then do memory analysis more
accurately.
Signed-off-by: Yalin Wang <yalin.wang@sonymobile.com>
Acked-by: Kirill A. Shutemov <kirill@shutemov.name>
Cc: Konstantin Khlebnikov <koct9i@gmail.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The VIRTIO_PCI_CAP_PCI_CFG in the PCI virtio 1.0 spec allows access to
the BAR registers without mapping them. This is a compulsory feature,
and we implement it here.
There are some subtleties involving access widths which we should
note:
4.1.4.7.1 Device Requirements: PCI configuration access capability
...
Upon detecting driver write access to pci_cfg_data, the device MUST
execute a write access at offset cap.offset at BAR selected by
cap.bar using the first cap.length bytes from pci_cfg_data.
Upon detecting driver read access to pci_cfg_data, the device MUST
execute a read access of length cap.length at offset cap.offset at
BAR selected by cap.bar and store the first cap.length bytes in
pci_cfg_data.
So, for a write, we copy into the pci_cfg_data window, then write from
there out to the BAR. This works correctly if cap.length != width of
write. Similarly, for a read, we read into window from the BAR then
read the value from there.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This is a magic register which causes a character to be outputted: it can
be used even before the device is configured.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Linus Torvalds