![Linus Torvalds](/assets/img/avatar_default.png)
This series introduces preliminary ACPI 5.1 support to the arm64 kernel using the "hardware reduced" profile. We don't support any peripherals yet, so it's fairly limited in scope: - Memory init (UEFI) - ACPI discovery (RSDP via UEFI) - CPU init (FADT) - GIC init (MADT) - SMP boot (MADT + PSCI) - ACPI Kconfig options (dependent on EXPERT) -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQEcBAABCgAGBQJVNOC2AAoJELescNyEwWM08dIH/1Pn5xa04wwNDn0MOpbuQMk2 kHM7hx69fbXflTJpnZRVyFBjRxxr5qilA7rljAFLnFeF8Fcll/s5VNy7ElHKLISq CB0ywgUfOd/sFJH57rcc67pC1b/XuqTbE1u1NFwvp2R3j1kGAEJWNA6SyxIP4bbc NO5jScx0lQOJ3rrPAXBW8qlGkeUk7TPOQJtMrpftNXlFLFrR63rPaEmMZ9dWepBF aRE4GXPvyUhpyv5o9RvlN5l8bQttiRJ3f9QjyG7NYhX0PXH3DyvGUzYlk2IoZtID v3ssCQH3uRsAZHIBhaTyNqFnUIaDR825bvGqyG/tj2Dt3kQZiF+QrfnU5D9TuMw= =zLJn -----END PGP SIGNATURE----- Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull initial ACPI support for arm64 from Will Deacon: "This series introduces preliminary ACPI 5.1 support to the arm64 kernel using the "hardware reduced" profile. We don't support any peripherals yet, so it's fairly limited in scope: - MEMORY init (UEFI) - ACPI discovery (RSDP via UEFI) - CPU init (FADT) - GIC init (MADT) - SMP boot (MADT + PSCI) - ACPI Kconfig options (dependent on EXPERT) ACPI for arm64 has been in development for a while now and hardware has been available that can boot with either FDT or ACPI tables. This has been made possible by both changes to the ACPI spec to cater for ARM-based machines (known as "hardware-reduced" in ACPI parlance) but also a Linaro-driven effort to get this supported on top of the Linux kernel. This pull request is the result of that work. These changes allow us to initialise the CPUs, interrupt controller, and timers via ACPI tables, with memory information and cmdline coming from EFI. We don't support a hybrid ACPI/FDT scheme. Of course, there is still plenty of work to do (a serial console would be nice!) but I expect that to happen on a per-driver basis after this core series has been merged. Anyway, the diff stat here is fairly horrible, but splitting this up and merging it via all the different subsystems would have been extremely painful. Instead, we've got all the relevant Acks in place and I've not seen anything other than trivial (Kconfig) conflicts in -next (for completeness, I've included my resolution below). Nearly half of the insertions fall under Documentation/. So, we'll see how this goes. Right now, it all depends on EXPERT and I fully expect people to use FDT by default for the immediate future" * tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (31 commits) ARM64 / ACPI: make acpi_map_gic_cpu_interface() as void function ARM64 / ACPI: Ignore the return error value of acpi_map_gic_cpu_interface() ARM64 / ACPI: fix usage of acpi_map_gic_cpu_interface ARM64: kernel: acpi: honour acpi=force command line parameter ARM64: kernel: acpi: refactor ACPI tables init and checks ARM64: kernel: psci: let ACPI probe PSCI version ARM64: kernel: psci: factor out probe function ACPI: move arm64 GSI IRQ model to generic GSI IRQ layer ARM64 / ACPI: Don't unflatten device tree if acpi=force is passed ARM64 / ACPI: additions of ACPI documentation for arm64 Documentation: ACPI for ARM64 ARM64 / ACPI: Enable ARM64 in Kconfig XEN / ACPI: Make XEN ACPI depend on X86 ARM64 / ACPI: Select ACPI_REDUCED_HARDWARE_ONLY if ACPI is enabled on ARM64 clocksource / arch_timer: Parse GTDT to initialize arch timer irqchip: Add GICv2 specific ACPI boot support ARM64 / ACPI: Introduce ACPI_IRQ_MODEL_GIC and register device's gsi ACPI / processor: Make it possible to get CPU hardware ID via GICC ACPI / processor: Introduce phys_cpuid_t for CPU hardware ID ARM64 / ACPI: Parse MADT for SMP initialization ...
284 lines
9.1 KiB
Plaintext
284 lines
9.1 KiB
Plaintext
menu "Xen driver support"
|
|
depends on XEN
|
|
|
|
config XEN_BALLOON
|
|
bool "Xen memory balloon driver"
|
|
default y
|
|
help
|
|
The balloon driver allows the Xen domain to request more memory from
|
|
the system to expand the domain's memory allocation, or alternatively
|
|
return unneeded memory to the system.
|
|
|
|
config XEN_SELFBALLOONING
|
|
bool "Dynamically self-balloon kernel memory to target"
|
|
depends on XEN && XEN_BALLOON && CLEANCACHE && SWAP && XEN_TMEM
|
|
default n
|
|
help
|
|
Self-ballooning dynamically balloons available kernel memory driven
|
|
by the current usage of anonymous memory ("committed AS") and
|
|
controlled by various sysfs-settable parameters. Configuring
|
|
FRONTSWAP is highly recommended; if it is not configured, self-
|
|
ballooning is disabled by default. If FRONTSWAP is configured,
|
|
frontswap-selfshrinking is enabled by default but can be disabled
|
|
with the 'tmem.selfshrink=0' kernel boot parameter; and self-ballooning
|
|
is enabled by default but can be disabled with the 'tmem.selfballooning=0'
|
|
kernel boot parameter. Note that systems without a sufficiently
|
|
large swap device should not enable self-ballooning.
|
|
|
|
config XEN_BALLOON_MEMORY_HOTPLUG
|
|
bool "Memory hotplug support for Xen balloon driver"
|
|
default n
|
|
depends on XEN_BALLOON && MEMORY_HOTPLUG
|
|
help
|
|
Memory hotplug support for Xen balloon driver allows expanding memory
|
|
available for the system above limit declared at system startup.
|
|
It is very useful on critical systems which require long
|
|
run without rebooting.
|
|
|
|
Memory could be hotplugged in following steps:
|
|
|
|
1) dom0: xl mem-max <domU> <maxmem>
|
|
where <maxmem> is >= requested memory size,
|
|
|
|
2) dom0: xl mem-set <domU> <memory>
|
|
where <memory> is requested memory size; alternatively memory
|
|
could be added by writing proper value to
|
|
/sys/devices/system/xen_memory/xen_memory0/target or
|
|
/sys/devices/system/xen_memory/xen_memory0/target_kb on dumU,
|
|
|
|
3) domU: for i in /sys/devices/system/memory/memory*/state; do \
|
|
[ "`cat "$i"`" = offline ] && echo online > "$i"; done
|
|
|
|
Memory could be onlined automatically on domU by adding following line to udev rules:
|
|
|
|
SUBSYSTEM=="memory", ACTION=="add", RUN+="/bin/sh -c '[ -f /sys$devpath/state ] && echo online > /sys$devpath/state'"
|
|
|
|
In that case step 3 should be omitted.
|
|
|
|
config XEN_BALLOON_MEMORY_HOTPLUG_LIMIT
|
|
int "Hotplugged memory limit (in GiB) for a PV guest"
|
|
default 512 if X86_64
|
|
default 4 if X86_32
|
|
range 0 64 if X86_32
|
|
depends on XEN_HAVE_PVMMU
|
|
depends on XEN_BALLOON_MEMORY_HOTPLUG
|
|
help
|
|
Maxmium amount of memory (in GiB) that a PV guest can be
|
|
expanded to when using memory hotplug.
|
|
|
|
A PV guest can have more memory than this limit if is
|
|
started with a larger maximum.
|
|
|
|
This value is used to allocate enough space in internal
|
|
tables needed for physical memory administration.
|
|
|
|
config XEN_SCRUB_PAGES
|
|
bool "Scrub pages before returning them to system"
|
|
depends on XEN_BALLOON
|
|
default y
|
|
help
|
|
Scrub pages before returning them to the system for reuse by
|
|
other domains. This makes sure that any confidential data
|
|
is not accidentally visible to other domains. Is it more
|
|
secure, but slightly less efficient.
|
|
If in doubt, say yes.
|
|
|
|
config XEN_DEV_EVTCHN
|
|
tristate "Xen /dev/xen/evtchn device"
|
|
default y
|
|
help
|
|
The evtchn driver allows a userspace process to trigger event
|
|
channels and to receive notification of an event channel
|
|
firing.
|
|
If in doubt, say yes.
|
|
|
|
config XEN_BACKEND
|
|
bool "Backend driver support"
|
|
depends on XEN_DOM0
|
|
default y
|
|
help
|
|
Support for backend device drivers that provide I/O services
|
|
to other virtual machines.
|
|
|
|
config XENFS
|
|
tristate "Xen filesystem"
|
|
select XEN_PRIVCMD
|
|
default y
|
|
help
|
|
The xen filesystem provides a way for domains to share
|
|
information with each other and with the hypervisor.
|
|
For example, by reading and writing the "xenbus" file, guests
|
|
may pass arbitrary information to the initial domain.
|
|
If in doubt, say yes.
|
|
|
|
config XEN_COMPAT_XENFS
|
|
bool "Create compatibility mount point /proc/xen"
|
|
depends on XENFS
|
|
default y
|
|
help
|
|
The old xenstore userspace tools expect to find "xenbus"
|
|
under /proc/xen, but "xenbus" is now found at the root of the
|
|
xenfs filesystem. Selecting this causes the kernel to create
|
|
the compatibility mount point /proc/xen if it is running on
|
|
a xen platform.
|
|
If in doubt, say yes.
|
|
|
|
config XEN_SYS_HYPERVISOR
|
|
bool "Create xen entries under /sys/hypervisor"
|
|
depends on SYSFS
|
|
select SYS_HYPERVISOR
|
|
default y
|
|
help
|
|
Create entries under /sys/hypervisor describing the Xen
|
|
hypervisor environment. When running native or in another
|
|
virtual environment, /sys/hypervisor will still be present,
|
|
but will have no xen contents.
|
|
|
|
config XEN_XENBUS_FRONTEND
|
|
tristate
|
|
|
|
config XEN_GNTDEV
|
|
tristate "userspace grant access device driver"
|
|
depends on XEN
|
|
default m
|
|
select MMU_NOTIFIER
|
|
help
|
|
Allows userspace processes to use grants.
|
|
|
|
config XEN_GRANT_DEV_ALLOC
|
|
tristate "User-space grant reference allocator driver"
|
|
depends on XEN
|
|
default m
|
|
help
|
|
Allows userspace processes to create pages with access granted
|
|
to other domains. This can be used to implement frontend drivers
|
|
or as part of an inter-domain shared memory channel.
|
|
|
|
config SWIOTLB_XEN
|
|
def_bool y
|
|
select SWIOTLB
|
|
|
|
config XEN_TMEM
|
|
tristate
|
|
depends on !ARM && !ARM64
|
|
default m if (CLEANCACHE || FRONTSWAP)
|
|
help
|
|
Shim to interface in-kernel Transcendent Memory hooks
|
|
(e.g. cleancache and frontswap) to Xen tmem hypercalls.
|
|
|
|
config XEN_PCIDEV_BACKEND
|
|
tristate "Xen PCI-device backend driver"
|
|
depends on PCI && X86 && XEN
|
|
depends on XEN_BACKEND
|
|
default m
|
|
help
|
|
The PCI device backend driver allows the kernel to export arbitrary
|
|
PCI devices to other guests. If you select this to be a module, you
|
|
will need to make sure no other driver has bound to the device(s)
|
|
you want to make visible to other guests.
|
|
|
|
The parameter "passthrough" allows you specify how you want the PCI
|
|
devices to appear in the guest. You can choose the default (0) where
|
|
PCI topology starts at 00.00.0, or (1) for passthrough if you want
|
|
the PCI devices topology appear the same as in the host.
|
|
|
|
The "hide" parameter (only applicable if backend driver is compiled
|
|
into the kernel) allows you to bind the PCI devices to this module
|
|
from the default device drivers. The argument is the list of PCI BDFs:
|
|
xen-pciback.hide=(03:00.0)(04:00.0)
|
|
|
|
If in doubt, say m.
|
|
|
|
config XEN_SCSI_BACKEND
|
|
tristate "XEN SCSI backend driver"
|
|
depends on XEN && XEN_BACKEND && TARGET_CORE
|
|
help
|
|
The SCSI backend driver allows the kernel to export its SCSI Devices
|
|
to other guests via a high-performance shared-memory interface.
|
|
Only needed for systems running as XEN driver domains (e.g. Dom0) and
|
|
if guests need generic access to SCSI devices.
|
|
|
|
config XEN_PRIVCMD
|
|
tristate
|
|
depends on XEN
|
|
default m
|
|
|
|
config XEN_STUB
|
|
bool "Xen stub drivers"
|
|
depends on XEN && X86_64 && BROKEN
|
|
default n
|
|
help
|
|
Allow kernel to install stub drivers, to reserve space for Xen drivers,
|
|
i.e. memory hotplug and cpu hotplug, and to block native drivers loaded,
|
|
so that real Xen drivers can be modular.
|
|
|
|
To enable Xen features like cpu and memory hotplug, select Y here.
|
|
|
|
config XEN_ACPI_HOTPLUG_MEMORY
|
|
tristate "Xen ACPI memory hotplug"
|
|
depends on XEN_DOM0 && XEN_STUB && ACPI
|
|
default n
|
|
help
|
|
This is Xen ACPI memory hotplug.
|
|
|
|
Currently Xen only support ACPI memory hot-add. If you want
|
|
to hot-add memory at runtime (the hot-added memory cannot be
|
|
removed until machine stop), select Y/M here, otherwise select N.
|
|
|
|
config XEN_ACPI_HOTPLUG_CPU
|
|
tristate "Xen ACPI cpu hotplug"
|
|
depends on XEN_DOM0 && XEN_STUB && ACPI
|
|
select ACPI_CONTAINER
|
|
default n
|
|
help
|
|
Xen ACPI cpu enumerating and hotplugging
|
|
|
|
For hotplugging, currently Xen only support ACPI cpu hotadd.
|
|
If you want to hotadd cpu at runtime (the hotadded cpu cannot
|
|
be removed until machine stop), select Y/M here.
|
|
|
|
config XEN_ACPI_PROCESSOR
|
|
tristate "Xen ACPI processor"
|
|
depends on XEN && X86 && ACPI_PROCESSOR && CPU_FREQ
|
|
default m
|
|
help
|
|
This ACPI processor uploads Power Management information to the Xen
|
|
hypervisor.
|
|
|
|
To do that the driver parses the Power Management data and uploads
|
|
said information to the Xen hypervisor. Then the Xen hypervisor can
|
|
select the proper Cx and Pxx states. It also registers itself as the
|
|
SMM so that other drivers (such as ACPI cpufreq scaling driver) will
|
|
not load.
|
|
|
|
To compile this driver as a module, choose M here: the module will be
|
|
called xen_acpi_processor If you do not know what to choose, select
|
|
M here. If the CPUFREQ drivers are built in, select Y here.
|
|
|
|
config XEN_MCE_LOG
|
|
bool "Xen platform mcelog"
|
|
depends on XEN_DOM0 && X86_64 && X86_MCE
|
|
default n
|
|
help
|
|
Allow kernel fetching MCE error from Xen platform and
|
|
converting it into Linux mcelog format for mcelog tools
|
|
|
|
config XEN_HAVE_PVMMU
|
|
bool
|
|
|
|
config XEN_EFI
|
|
def_bool y
|
|
depends on X86_64 && EFI
|
|
|
|
config XEN_AUTO_XLATE
|
|
def_bool y
|
|
depends on ARM || ARM64 || XEN_PVHVM
|
|
help
|
|
Support for auto-translated physmap guests.
|
|
|
|
config XEN_ACPI
|
|
def_bool y
|
|
depends on X86 && ACPI
|
|
|
|
endmenu
|