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Intel CPUs expect the cache bitmap provided by user-space to have on a
single span of 1s, whereas AMD can support bitmaps like 0xf00f. Arm's
MPAM support also allows sparse bitmaps.
Similarly, Intel CPUs check at least one bit set, whereas AMD CPUs are
quite happy with an empty bitmap. Arm's MPAM allows an empty bitmap.
To move resctrl out to /fs/, platform differences like this need to be
explained.
Add two resource properties arch_has_{empty,sparse}_bitmaps. Test these
around the relevant parts of cbm_validate().
Merging the validate calls causes AMD to gain the min_cbm_bits test
needed for Haswell, but as it always sets this value to 1, it will never
match.
[ bp: Massage commit message. ]
Signed-off-by: James Morse <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Reviewed-by: Babu Moger <[email protected]>
Reviewed-by: Reinette Chatre <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
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Now after arch_needs_linear has been added, the parse_bw() calls are
almost the same between AMD and Intel.
The difference is '!is_mba_sc()', which is not checked on AMD. This
will always be true on AMD CPUs as mba_sc cannot be enabled as
is_mba_linear() is false.
Removing this duplication means user-space visible behaviour and
error messages are not validated or generated in different places.
Reviewed-by : Babu Moger <[email protected]>
Signed-off-by: James Morse <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Reviewed-by: Reinette Chatre <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
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MBA difference
The configuration values user-space provides to the resctrl filesystem
are ABI. To make this work on another architecture, all the ABI bits
should be moved out of /arch/x86 and under /fs.
To do this, the differences between AMD and Intel CPUs needs to be
explained to resctrl via resource properties, instead of function
pointers that let the arch code accept subtly different values on
different platforms/architectures.
For MBA, Intel CPUs reject configuration attempts for non-linear
resources, whereas AMD ignore this field as its MBA resource is never
linear. To merge the parse/validate functions, this difference needs to
be explained.
Add struct rdt_membw::arch_needs_linear to indicate the arch code needs
the linear property to be true to configure this resource. AMD can set
this and delay_linear to false. Intel can set arch_needs_linear to
true to keep the existing "No support for non-linear MB domains" error
message for affected platforms.
[ bp: convert "we" etc to passive voice. ]
Signed-off-by: James Morse <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Reviewed-by: Reinette Chatre <[email protected]>
Reviewed-by: Babu Moger <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
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The original Memory Bandwidth Monitoring (MBM) architectural
definition defines counters of up to 62 bits in the IA32_QM_CTR MSR,
and the first-generation MBM implementation uses 24 bit counters.
Software is required to poll at 1 second or faster to ensure that
data is retrieved before a counter rollover occurs more than once
under worst conditions.
As system bandwidths scale the software requirement is maintained with
the introduction of a per-resource enumerable MBM counter width.
In preparation for supporting hardware with an enumerable MBM counter
width the current globally static MBM counter width is moved to a
per-resource MBM counter width. Currently initialized to 24 always
to result in no functional change.
In essence there is one function, mbm_overflow_count() that needs to
know the counter width to handle rollovers. The static value
used within mbm_overflow_count() will be replaced with a value
discovered from the hardware. Support for learning the MBM counter
width from hardware is added in the change that follows.
Signed-off-by: Reinette Chatre <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Link: https://lkml.kernel.org/r/e36743b9800f16ce600f86b89127391f61261f23.1588715690.git.reinette.chatre@intel.com
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When a mon group is being deleted, rdtgrp->flags is set to RDT_DELETED
in rdtgroup_rmdir_mon() firstly. The structure of rdtgrp will be freed
until rdtgrp->waitcount is dropped to 0 in rdtgroup_kn_unlock() later.
During the window of deleting a mon group, if an application calls
rdtgroup_mondata_show() to read mondata under this mon group,
'rdtgrp' returned from rdtgroup_kn_lock_live() is a NULL pointer when
rdtgrp->flags is RDT_DELETED. And then 'rdtgrp' is passed in this path:
rdtgroup_mondata_show() --> mon_event_read() --> mon_event_count().
Thus it results in NULL pointer dereference in mon_event_count().
Check 'rdtgrp' in rdtgroup_mondata_show(), and return -ENOENT
immediately when reading mondata during the window of deleting a mon
group.
Fixes: d89b7379015f ("x86/intel_rdt/cqm: Add mon_data")
Signed-off-by: Xiaochen Shen <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Reviewed-by: Fenghua Yu <[email protected]>
Reviewed-by: Tony Luck <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: [email protected]
Cc: Reinette Chatre <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: x86-ml <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
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Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms and conditions of the gnu general public license
version 2 as published by the free software foundation this program
is distributed in the hope it will be useful but without any
warranty without even the implied warranty of merchantability or
fitness for a particular purpose see the gnu general public license
for more details
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 263 file(s).
Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Allison Randal <[email protected]>
Reviewed-by: Alexios Zavras <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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Currently, when a new resource group is created, the allocation values
of the MBA resource are not initialized and remain meaningless data.
For example:
mkdir /sys/fs/resctrl/p1
cat /sys/fs/resctrl/p1/schemata
MB:0=100;1=100
echo "MB:0=10;1=20" > /sys/fs/resctrl/p1/schemata
cat /sys/fs/resctrl/p1/schemata
MB:0= 10;1= 20
rmdir /sys/fs/resctrl/p1
mkdir /sys/fs/resctrl/p2
cat /sys/fs/resctrl/p2/schemata
MB:0= 10;1= 20
Therefore, when the new group is created, it is reasonable to initialize
MBA resource with default values.
Initialize the MBA resource and cache resources in separate functions.
[ bp: Add newlines between code blocks for better readability. ]
Signed-off-by: Xiaochen Shen <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Reviewed-by: Fenghua Yu <[email protected]>
Reviewed-by: Reinette Chatre <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: [email protected]
Cc: Thomas Gleixner <[email protected]>
Cc: Tony Luck <[email protected]>
Cc: x86-ml <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 cache control updates from Borislav Petkov:
- The generalization of the RDT code to accommodate the addition of
AMD's very similar implementation of the cache monitoring feature.
This entails a subsystem move into a separate and generic
arch/x86/kernel/cpu/resctrl/ directory along with adding
vendor-specific initialization and feature detection helpers.
Ontop of that is the unification of user-visible strings, both in the
resctrl filesystem error handling and Kconfig.
Provided by Babu Moger and Sherry Hurwitz.
- Code simplifications and error handling improvements by Reinette
Chatre.
* 'x86-cache-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/resctrl: Fix rdt_find_domain() return value and checks
x86/resctrl: Remove unnecessary check for cbm_validate()
x86/resctrl: Use rdt_last_cmd_puts() where possible
MAINTAINERS: Update resctrl filename patterns
Documentation: Rename and update intel_rdt_ui.txt to resctrl_ui.txt
x86/resctrl: Introduce AMD QOS feature
x86/resctrl: Fixup the user-visible strings
x86/resctrl: Add AMD's X86_FEATURE_MBA to the scattered CPUID features
x86/resctrl: Rename the config option INTEL_RDT to RESCTRL
x86/resctrl: Add vendor check for the MBA software controller
x86/resctrl: Bring cbm_validate() into the resource structure
x86/resctrl: Initialize the vendor-specific resource functions
x86/resctrl: Move all the macros to resctrl/internal.h
x86/resctrl: Re-arrange the RDT init code
x86/resctrl: Rename the RDT functions and definitions
x86/resctrl: Rename and move rdt files to a separate directory
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rdt_find_domain() returns an ERR_PTR() that is generated from a provided
domain id when the value is negative.
Care needs to be taken when creating an ERR_PTR() from this value
because a subsequent check using IS_ERR() expects the error to
be within the MAX_ERRNO range. Using an invalid domain id as an
ERR_PTR() does work at this time since this is currently always -1.
Using this undocumented assumption is fragile since future users of
rdt_find_domain() may not be aware of thus assumption.
Two related issues are addressed:
- Ensure that rdt_find_domain() always returns a valid error value by
forcing the error to be -ENODEV when a negative domain id is provided.
- In a few instances the return value of rdt_find_domain() is just
checked for NULL - fix these to include a check of ERR_PTR.
Fixes: d89b7379015f ("x86/intel_rdt/cqm: Add mon_data")
Fixes: 521348b011d6 ("x86/intel_rdt: Introduce utility to obtain CDP peer")
Signed-off-by: Reinette Chatre <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Tony Luck <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: x86-ml <[email protected]>
Link: https://lkml.kernel.org/r/b88cd4ff6a75995bf8db9b0ea546908fe50f69f3.1544479852.git.reinette.chatre@intel.com
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The Smatch static checker reports the following error after commit:
a36c5ff560fb ("x86/resctrl: Bring cbm_validate() into the resource structure"):
arch/x86/kernel/cpu/resctrl/ctrlmondata.c:227 parse_cbm()
error: uninitialized symbol 'cbm_val'.
arch/x86/kernel/cpu/resctrl/ctrlmondata.c:236 parse_cbm()
error: uninitialized symbol 'cbm_val'.
This could happen if ->cbm_validate() is NULL which could leave cbm_val
uninitialized.
However, there is no case where ->cbm_validate() can be NULL as it is
initialized based on a vendor check. So it is either an Intel or an AMD
version it points to. And in both the cases it is initialized properly.
Thus, remove the first check.
Verified the fix running Smatch.
[ bp: massage commit message. ]
Fixes: a36c5ff560fb ("x86/resctrl: Bring cbm_validate() into the resource structure")
Reported-by: Dan Carpenter <[email protected]>
Signed-off-by: Babu Moger <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Cc: Fenghua Yu <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Reinette Chatre <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: x86-ml <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
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The last_cmd_status sequence buffer contains user-visible messages
(accessed via /sys/fs/resctrl/info/last_cmd_status) that detail any
errors encountered while interacting with the resctrl filesystem.
rdt_last_cmd_printf() and rdt_last_cmd_puts() are the two calls
available to respectively print a string with format specifiers or a
simple one (which contains no format specifiers) to the last_cmd_status
buffer.
A few occurrences exist where rdt_last_cmd_printf() is used to print
a simple string. Doing so does not result in incorrect result or
incorrect behavior, but rdt_last_cmd_puts() is the function intended to
be used in these cases, as it is faster and it doesn't need to do the
vsnprintf() formatting.
Fix these occurrences to use rdt_last_cmd_puts() instead. While doing
so, fix two typos that were recently introduced into two of these simple
strings.
[ bp: massage commit message and correct typos. ]
Fixes: 723f1a0dd8e2 ("x86/resctrl: Fixup the user-visible strings")
Fixes: e0bdfe8e36f3 ("x86/intel_rdt: Support creation/removal of pseudo-locked region")
Fixes: 9ab9aa15c309 ("x86/intel_rdt: Ensure requested schemata respects mode")
Fixes: d48d7a57f718 ("x86/intel_rdt: Introduce resource group's mode resctrl file")
Fixes: dfe9674b04ff ("x86/intel_rdt: Enable entering of pseudo-locksetup mode")
Signed-off-by: Reinette Chatre <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Fenghua Yu <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Tony Luck <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: x86-ml <[email protected]>
Link: https://lkml.kernel.org/r/f48e46a016d6a5c79f13de8faeca382052189e2e.1543346009.git.reinette.chatre@intel.com
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Enable QOS feature on AMD.
Following QoS sub-features are supported on AMD if the underlying
hardware supports it:
- L3 Cache allocation enforcement
- L3 Cache occupancy monitoring
- L3 Code-Data Prioritization support
- Memory Bandwidth Enforcement (Allocation)
The specification is available at:
https://developer.amd.com/wp-content/resources/56375.pdf
There are differences in the way some of the features are implemented.
Separate those functions and add those as vendor specific functions.
The major difference is in MBA feature:
- AMD uses CPUID leaf 0x80000020 to initialize the MBA features.
- AMD uses direct bandwidth value instead of delay based on bandwidth values.
- MSR register base addresses are different for MBA.
- AMD allows non-contiguous L3 cache bit masks.
Signed-off-by: Babu Moger <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: Brijesh Singh <[email protected]>
Cc: "Chang S. Bae" <[email protected]>
Cc: David Miller <[email protected]>
Cc: David Woodhouse <[email protected]>
Cc: Dmitry Safonov <[email protected]>
Cc: Fenghua Yu <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jann Horn <[email protected]>
Cc: Joerg Roedel <[email protected]>
Cc: Jonathan Corbet <[email protected]>
Cc: Josh Poimboeuf <[email protected]>
Cc: Kate Stewart <[email protected]>
Cc: "Kirill A. Shutemov" <[email protected]>
Cc: <[email protected]>
Cc: Mauro Carvalho Chehab <[email protected]>
Cc: Paolo Bonzini <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Philippe Ombredanne <[email protected]>
Cc: Pu Wen <[email protected]>
Cc: <[email protected]>
Cc: "Rafael J. Wysocki" <[email protected]>
Cc: Reinette Chatre <[email protected]>
Cc: Rian Hunter <[email protected]>
Cc: Sherry Hurwitz <[email protected]>
Cc: Suravee Suthikulpanit <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Thomas Lendacky <[email protected]>
Cc: Tony Luck <[email protected]>
Cc: Vitaly Kuznetsov <[email protected]>
Cc: <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
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Fix the messages in rdt_last_cmd_printf() and rdt_last_cmd_puts() to
make them more meaningful and consistent.
[ bp: s/cpu/CPU/; s/mem\W/memory ]
Signed-off-by: Babu Moger <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: Brijesh Singh <[email protected]>
Cc: "Chang S. Bae" <[email protected]>
Cc: David Miller <[email protected]>
Cc: David Woodhouse <[email protected]>
Cc: Dmitry Safonov <[email protected]>
Cc: Fenghua Yu <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jann Horn <[email protected]>
Cc: Joerg Roedel <[email protected]>
Cc: Jonathan Corbet <[email protected]>
Cc: Josh Poimboeuf <[email protected]>
Cc: Kate Stewart <[email protected]>
Cc: "Kirill A. Shutemov" <[email protected]>
Cc: <[email protected]>
Cc: Mauro Carvalho Chehab <[email protected]>
Cc: Paolo Bonzini <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Philippe Ombredanne <[email protected]>
Cc: Pu Wen <[email protected]>
Cc: <[email protected]>
Cc: "Rafael J. Wysocki" <[email protected]>
Cc: Reinette Chatre <[email protected]>
Cc: Rian Hunter <[email protected]>
Cc: Sherry Hurwitz <[email protected]>
Cc: Suravee Suthikulpanit <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Thomas Lendacky <[email protected]>
Cc: Tony Luck <[email protected]>
Cc: Vitaly Kuznetsov <[email protected]>
Cc: <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
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Bring all the functions that are different between the vendors into the
resource structure and initialize them dynamically. Add _intel suffix to
the Intel-specific functions.
cbm_validate() which does cache bitmask validation, differs between the
vendors as AMD allows non-contiguous masks. So, use separate functions
for Intel and AMD.
[ bp: Massage commit message and fixup rdt_resource members' vertical
alignment. ]
Signed-off-by: Babu Moger <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: Brijesh Singh <[email protected]>
Cc: "Chang S. Bae" <[email protected]>
Cc: David Miller <[email protected]>
Cc: David Woodhouse <[email protected]>
Cc: Dmitry Safonov <[email protected]>
Cc: Fenghua Yu <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jann Horn <[email protected]>
Cc: Joerg Roedel <[email protected]>
Cc: Jonathan Corbet <[email protected]>
Cc: Josh Poimboeuf <[email protected]>
Cc: Kate Stewart <[email protected]>
Cc: "Kirill A. Shutemov" <[email protected]>
Cc: <[email protected]>
Cc: Mauro Carvalho Chehab <[email protected]>
Cc: Paolo Bonzini <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Philippe Ombredanne <[email protected]>
Cc: Pu Wen <[email protected]>
Cc: <[email protected]>
Cc: "Rafael J. Wysocki" <[email protected]>
Cc: Reinette Chatre <[email protected]>
Cc: Rian Hunter <[email protected]>
Cc: Sherry Hurwitz <[email protected]>
Cc: Suravee Suthikulpanit <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Thomas Lendacky <[email protected]>
Cc: Tony Luck <[email protected]>
Cc: Vitaly Kuznetsov <[email protected]>
Cc: <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
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Initialize the resource functions that are different between the
vendors. Some features are initialized differently between the vendors.
Add _intel suffix to Intel-specific functions.
For example, the MBA feature varies significantly between Intel and AMD.
Separate the initialization of these resource functions. That way we can
easily add AMD's functions later.
Signed-off-by: Babu Moger <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: Brijesh Singh <[email protected]>
Cc: "Chang S. Bae" <[email protected]>
Cc: David Miller <[email protected]>
Cc: David Woodhouse <[email protected]>
Cc: Dmitry Safonov <[email protected]>
Cc: Fenghua Yu <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jann Horn <[email protected]>
Cc: Joerg Roedel <[email protected]>
Cc: Jonathan Corbet <[email protected]>
Cc: Josh Poimboeuf <[email protected]>
Cc: Kate Stewart <[email protected]>
Cc: "Kirill A. Shutemov" <[email protected]>
Cc: <[email protected]>
Cc: Mauro Carvalho Chehab <[email protected]>
Cc: Paolo Bonzini <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Philippe Ombredanne <[email protected]>
Cc: Pu Wen <[email protected]>
Cc: <[email protected]>
Cc: "Rafael J. Wysocki" <[email protected]>
Cc: Reinette Chatre <[email protected]>
Cc: Rian Hunter <[email protected]>
Cc: Sherry Hurwitz <[email protected]>
Cc: Suravee Suthikulpanit <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Thomas Lendacky <[email protected]>
Cc: Tony Luck <[email protected]>
Cc: Vitaly Kuznetsov <[email protected]>
Cc: <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
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New generation of AMD processors add support for RDT (or QOS) features.
Together, these features will be called RESCTRL. With more than one
vendors supporting these features, it seems more appropriate to rename
these files.
Create a new directory with the name 'resctrl' and move all the
intel_rdt files to the new directory. This way all the resctrl related
code resides inside one directory.
[ bp: Add SPDX identifier to the Makefile ]
Suggested-by: Borislav Petkov <[email protected]>
Signed-off-by: Babu Moger <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: Brijesh Singh <[email protected]>
Cc: "Chang S. Bae" <[email protected]>
Cc: David Miller <[email protected]>
Cc: David Woodhouse <[email protected]>
Cc: Dmitry Safonov <[email protected]>
Cc: Fenghua Yu <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jann Horn <[email protected]>
Cc: Joerg Roedel <[email protected]>
Cc: Jonathan Corbet <[email protected]>
Cc: Josh Poimboeuf <[email protected]>
Cc: Kate Stewart <[email protected]>
Cc: "Kirill A. Shutemov" <[email protected]>
Cc: <[email protected]>
Cc: Mauro Carvalho Chehab <[email protected]>
Cc: Paolo Bonzini <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Philippe Ombredanne <[email protected]>
Cc: Pu Wen <[email protected]>
Cc: <[email protected]>
Cc: "Rafael J. Wysocki" <[email protected]>
Cc: Reinette Chatre <[email protected]>
Cc: Rian Hunter <[email protected]>
Cc: Sherry Hurwitz <[email protected]>
Cc: Suravee Suthikulpanit <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Thomas Lendacky <[email protected]>
Cc: Tony Luck <[email protected]>
Cc: Vitaly Kuznetsov <[email protected]>
Cc: <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
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