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linux/arch/x86/include/asm
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Linus Torvalds 7fef099702 x86/resctl: fix scheduler confusion with 'current' 
The implementation of 'current' on x86 is very intentionally special: it
is a very common thing to look up, and it uses 'this_cpu_read_stable()'
to get the current thread pointer efficiently from per-cpu storage.

And the keyword in there is 'stable': the current thread pointer never
changes as far as a single thread is concerned.  Even if when a thread
is preempted, or moved to another CPU, or even across an explicit call
'schedule()' that thread will still have the same value for 'current'.

It is, after all, the kernel base pointer to thread-local storage.
That's why it's stable to begin with, but it's also why it's important
enough that we have that special 'this_cpu_read_stable()' access for it.

So this is all done very intentionally to allow the compiler to treat
'current' as a value that never visibly changes, so that the compiler
can do CSE and combine multiple different 'current' accesses into one.

However, there is obviously one very special situation when the
currently running thread does actually change: inside the scheduler
itself.

So the scheduler code paths are special, and do not have a 'current'
thread at all.  Instead there are _two_ threads: the previous and the
next thread - typically called 'prev' and 'next' (or prev_p/next_p)
internally.

So this is all actually quite straightforward and simple, and not all
that complicated.

Except for when you then have special code that is run in scheduler
context, that code then has to be aware that 'current' isn't really a
valid thing.  Did you mean 'prev'? Did you mean 'next'?

In fact, even if then look at the code, and you use 'current' after the
new value has been assigned to the percpu variable, we have explicitly
told the compiler that 'current' is magical and always stable.  So the
compiler is quite free to use an older (or newer) value of 'current',
and the actual assignment to the percpu storage is not relevant even if
it might look that way.

Which is exactly what happened in the resctl code, that blithely used
'current' in '__resctrl_sched_in()' when it really wanted the new
process state (as implied by the name: we're scheduling 'into' that new
resctl state).  And clang would end up just using the old thread pointer
value at least in some configurations.

This could have happened with gcc too, and purely depends on random
compiler details.  Clang just seems to have been more aggressive about
moving the read of the per-cpu current_task pointer around.

The fix is trivial: just make the resctl code adhere to the scheduler
rules of using the prev/next thread pointer explicitly, instead of using
'current' in a situation where it just wasn't valid.

That same code is then also used outside of the scheduler context (when
a thread resctl state is explicitly changed), and then we will just pass
in 'current' as that pointer, of course.  There is no ambiguity in that
case.

The fix may be trivial, but noticing and figuring out what went wrong
was not.  The credit for that goes to Stephane Eranian.

Reported-by: Stephane Eranian <eranian@google.com>
Link: https://lore.kernel.org/lkml/20230303231133.1486085-1-eranian@google.com/
Link: https://lore.kernel.org/lkml/alpine.LFD.2.01.0908011214330.3304@localhost.localdomain/
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Tested-by: Tony Luck <tony.luck@intel.com>
Tested-by: Stephane Eranian <eranian@google.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2023-03-08 11:48:11 -08:00
..
e820 x86/PCI: Revert "x86/PCI: Clip only host bridge windows for E820 regions" 2022-06-17 14:24:14 -05:00
fpu Updates in this cycle: 2023-02-20 18:50:02 -08:00
numachip x86/numachip: Introduce Numachip2 timer mechanisms 2015-09-22 22:25:33 +02:00
shared - Fixup comment typo 2023-02-25 09:11:30 -08:00
trace x86/fpu: Convert tracing to fpstate 2021-10-20 22:35:04 +02:00
uv x86: Fix various typos in comments 2021-03-18 15:31:53 +01:00
vdso x86/vdso: Fix -Wmissing-prototypes warnings 2023-02-07 18:23:17 +01:00
xen ARM: 2023-02-25 11:30:21 -08:00
acenv.h ACPICA: Avoid cache flush inside virtual machines 2022-04-07 08:27:54 -07:00
acpi.h acpi: Fix suspend with Xen PV 2023-01-19 13:52:05 -08:00
acrn.h x86/acrn: Set up timekeeping 2022-08-04 11:11:59 +02:00
agp.h char/agp: consolidate {alloc,free}_gatt_pages() 2023-02-13 22:13:12 +01:00
alternative.h x86/alternatives: Add alt_instr.flags 2023-01-05 12:46:47 +01:00
amd-ibs.h perf/x86/amd: Add IBS OP_DATA2 DataSrc bit definitions 2022-09-29 12:20:54 +02:00
amd_hsmp.h platform/x86: Add AMD system management interface 2022-03-02 11:42:36 +01:00
amd_nb.h x86/amd_nb: Unexport amd_cache_northbridges() 2022-04-05 19:22:27 +02:00
apic.h x86/apic: Handle no CONFIG_X86_X2APIC on systems with x2APIC enabled by BIOS 2022-12-02 14:28:52 +01:00
apicdef.h KVM: x86: lapic: Rename [GET/SET]_APIC_DEST_FIELD to [GET/SET]_XAPIC_DEST_FIELD 2022-06-24 12:44:34 -04:00
apm.h x86/apm: Don't access __preempt_count with zeroed fs 2018-07-16 17:59:57 +02:00
arch_hweight.h x86/kconfig: Disable CONFIG_GENERIC_HWEIGHT and remove __HAVE_ARCH_SW_HWEIGHT 2019-05-13 11:07:33 +02:00
archrandom.h random: handle archrandom with multiple longs 2022-07-25 13:26:14 +02:00
asm-offsets.h
asm-prototypes.h x86/gsseg: Add the new <asm/gsseg.h> header to <asm/asm-prototypes.h> 2023-01-13 13:43:20 +01:00
asm.h x86/extable: Prefer local labels in .set directives 2022-04-07 11:27:02 +02:00
atomic.h locking/atomic: make ARCH_ATOMIC a Kconfig symbol 2021-05-26 13:20:49 +02:00
atomic64_32.h x86/atomics: Always inline arch_atomic64*() 2023-01-31 15:01:46 +01:00
atomic64_64.h x86/atomics: Always inline arch_atomic64*() 2023-01-31 15:01:46 +01:00
audit.h x86/audit: Fix a -Wmissing-prototypes warning for ia32_classify_syscall() 2020-05-19 18:03:07 +02:00
barrier.h x86/barriers, kcsan: Use generic instrumentation for non-smp barriers 2021-12-09 16:42:28 -08:00
bios_ebda.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
bitops.h x86/asm/bitops: Use __builtin_ctzl() to evaluate constant expressions 2022-09-20 15:35:37 +02:00
boot.h x86: Add support for ZSTD compressed kernel 2020-07-31 11:49:09 +02:00
bootparam_utils.h x86/boot: Add a pointer to Confidential Computing blob in bootparams 2022-04-07 16:47:11 +02:00
bug.h - Remove all the code around GS switching on 32-bit now that it is not 2022-05-23 18:42:07 -07:00
bugs.h x86/mpx: remove MPX from arch/x86 2020-01-23 10:41:20 -08:00
cache.h treewide: Convert macro and uses of __section(foo) to __section("foo") 2020-10-25 14:51:49 -07:00
cacheflush.h asm-generic: don't include <linux/mm.h> in cacheflush.h 2020-06-08 11:05:57 -07:00
cacheinfo.h x86/cacheinfo: Switch cache_ap_init() to hotplug callback 2022-11-10 13:12:45 +01:00
ce4100.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
cfi.h x86: Add support for CONFIG_CFI_CLANG 2022-09-26 10:13:16 -07:00
checksum.h x86: kasan: kmsan: support CONFIG_GENERIC_CSUM on x86, enable it for KASAN/KMSAN 2022-10-03 14:03:24 -07:00
checksum_32.h i386: propagate the calling conventions change down to csum_partial_copy_generic() 2020-08-20 15:45:18 -04:00
checksum_64.h net: checksum: drop the linux/uaccess.h include 2023-01-27 11:19:46 +00:00
clocksource.h x86: Introduce asm/vdso/clocksource.h 2020-03-21 15:23:54 +01:00
cmdline.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
cmpxchg.h x86: Fix various typos in comments 2021-03-18 15:31:53 +01:00
cmpxchg_32.h x86/mm/pae: Get rid of set_64bit() 2022-12-15 10:37:27 -08:00
cmpxchg_64.h x86_64: Remove pointless set_64bit() usage 2022-12-15 10:37:27 -08:00
coco.h x86/coco: Add API to handle encryption mask 2022-02-23 19:14:29 +01:00
compat.h RISC-V Patches for the 5.19 Merge Window, Part 1 2022-05-31 14:10:54 -07:00
cpu.h x86/microcode/intel: Add hdr_type to intel_microcode_sanity_check() 2022-11-18 22:08:19 +01:00
cpu_device_id.h x86/cpu: Add a X86_MATCH_INTEL_FAM6_MODEL_STEPPINGS() macro 2020-05-07 13:48:05 +02:00
cpu_entry_area.h x86/mm: Randomize per-cpu entry area 2022-12-15 10:37:26 -08:00
cpufeature.h x86/cpu, kvm: Add support for CPUID_80000021_EAX 2023-01-25 12:33:06 +01:00
cpufeatures.h ARM: 2023-02-25 11:30:21 -08:00
cpuid.h x86/cpuid: Carve out all CPUID functionality 2022-11-29 20:41:24 +01:00
cpuidle_haltpoll.h cpuidle-haltpoll: vcpu hotplug support 2019-09-03 09:36:36 +02:00
cpumask.h cpumask: Add a x86-specific cpumask_clear_cpu() helper 2022-02-12 18:20:05 +01:00
crash.h x86/crash: Remove crash_reserve_low_1M() 2021-06-07 12:14:45 +02:00
current.h x86/retbleed: Add SKL return thunk 2022-10-17 16:41:15 +02:00
debugreg.h - Cache the AMD debug registers in per-CPU variables to avoid MSR writes 2023-02-21 14:51:40 -08:00
delay.h x86/delay: Introduce TPAUSE delay 2020-05-07 16:06:20 +02:00
desc.h Merge branch 'akpm' (patches from Andrew) 2021-07-02 12:08:10 -07:00
desc_defs.h x86/idt: Make IDT init functions static inlines 2020-09-07 22:44:43 +02:00
device.h x86: Remove dev->archdata.iommu pointer 2020-06-30 11:59:48 +02:00
disabled-features.h x86/cpu, kvm: Add support for CPUID_80000021_EAX 2023-01-25 12:33:06 +01:00
div64.h sched/cputime: Improve cputime_adjust() 2020-06-15 14:10:00 +02:00
dma-mapping.h dma-mapping: no need to pass a bus_type into get_arch_dma_ops() 2023-02-15 12:35:20 +01:00
dma.h PCI: Move isa_dma_bridge_buggy out of asm/dma.h 2022-07-22 17:24:47 -05:00
dmi.h x86: Don't include linux/irq.h from asm/hardirq.h 2018-08-05 09:53:13 +02:00
doublefault.h x86/32: Remove CONFIG_DOUBLEFAULT 2020-04-14 14:24:05 +02:00
dwarf2.h x86: remove always-defined CONFIG_AS_CFI_SECTIONS 2020-04-09 00:01:59 +09:00
edac.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
efi.h efi: Add mixed-mode thunk recipe for GetMemoryAttributes 2023-02-10 15:20:55 +01:00
elf.h Unification of regset and non-regset sides of ELF coredump 2022-12-12 18:18:34 -08:00
elfcore-compat.h [amd64] clean PRSTATUS_SIZE/SET_PR_FPVALID up properly 2021-01-06 08:40:56 -05:00
emergency-restart.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
emulate_prefix.h x86: xen: kvm: Gather the definition of emulate prefixes 2019-10-17 21:31:57 +02:00
enclu.h x86/vdso: Implement a vDSO for Intel SGX enclave call 2020-11-18 18:02:50 +01:00
entry-common.h x86/cpu: Remove unneeded 64-bit dependency in arch_enter_from_user_mode() 2022-11-22 16:11:57 +01:00
espfix.h init: Invoke init_espfix_bsp() from mm_init() 2017-12-22 20:13:05 +01:00
exec.h
extable.h x86/extable: Annotate ex_handler_msr_mce() as a dead end 2022-05-27 12:34:45 +02:00
extable_fixup_types.h x86: simplify load_unaligned_zeropad() implementation 2022-08-16 11:03:38 -07:00
fb.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
fixmap.h x86/platform/intel-mid: Remove unused leftovers (vRTC) 2021-02-09 15:28:37 +01:00
floppy.h floppy: remove redundant assignment to variable st 2021-04-20 08:59:03 -06:00
frame.h x86/unwind/fp: Fix FP unwinding in ret_from_fork 2020-09-18 09:59:40 +02:00
fsgsbase.h x86/fsgsbase: Replace static_cpu_has() with boot_cpu_has() 2020-08-24 18:18:32 +02:00
ftrace.h ftrace: abstract DYNAMIC_FTRACE_WITH_ARGS accesses 2022-11-18 13:56:41 +00:00
futex.h x86/futex: Remove .fixup usage 2021-12-11 09:09:47 +01:00
gart.h x86: remove the IOMMU table infrastructure 2022-04-18 07:21:10 +02:00
GEN-for-each-reg.h x86/asm: Fix register order 2021-10-28 23:25:26 +02:00
genapic.h
geode.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
gsseg.h x86/gsseg: Use the LKGS instruction if available for load_gs_index() 2023-01-13 10:07:27 +01:00
hardirq.h x86/softirq: Move softirq pending next to current task 2022-10-17 16:41:05 +02:00
highmem.h mm/usercopy: Check kmap addresses properly 2022-04-13 12:15:50 -07:00
hpet.h x86/hpet: Move MSI support into hpet.c 2020-10-28 20:26:25 +01:00
hugetlb.h mm/hugetlb: define a generic fallback for arch_clear_hugepage_flags() 2020-06-03 20:09:46 -07:00
hw_breakpoint.h perf/hw_breakpoint: Optimize constant number of breakpoint slots 2022-08-30 10:56:22 +02:00
hw_irq.h iommu/amd: Fix IOMMU interrupt generation in X2APIC mode 2020-11-18 20:55:59 +01:00
hyperv-tlfs.h ARM: 2023-02-25 11:30:21 -08:00
hyperv_timer.h clocksource/drivers/hyper-v: Include asm/hyperv-tlfs.h not asm/mshyperv.h 2022-11-17 13:58:32 +01:00
hypervisor.h x86/paravirt: Remove const mark from x86_hyper_xen_hvm variable 2019-07-17 08:09:59 +02:00
i8259.h x86: Avoid magic number with ELCR register accesses 2021-08-10 23:31:43 +02:00
ia32.h x86: Fix misspelled Kconfig symbols 2021-10-05 21:48:30 +02:00
ia32_unistd.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ibt.h efi: x86: Wire up IBT annotation in memory attributes table 2023-02-09 19:30:54 +01:00
idtentry.h x86/entry: KVM: Use dedicated VMX NMI entry for 32-bit kernels too 2023-01-24 10:36:40 -08:00
imr.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441 2019-06-05 17:37:17 +02:00
inat.h x86/insn: Add a __ignore_sync_check__ marker 2021-03-15 11:00:57 +01:00
inat_types.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
init.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
insn-eval.h x86/insn: Avoid namespace clash by separating instruction decoder MMIO type from MMIO trace type 2023-01-03 18:46:06 +01:00
insn.h x86/insn: Add AVX512-FP16 instructions to the x86 instruction decoder 2022-01-23 20:38:01 +01:00
inst.h x86/asm: Drop unused RDPID macro 2020-11-26 12:58:56 +01:00
intel-family.h x86/cpu: Add Lunar Lake M 2023-02-08 12:04:35 -08:00
intel-mid.h x86/platform/intel-mid: Update Copyright year and drop file names 2021-02-15 20:10:30 +01:00
intel_ds.h perf/x86/intel: Enable PEBS format 5 2022-02-02 13:11:43 +01:00
intel_pconfig.h x86: Fix various typos in comments 2021-03-18 15:31:53 +01:00
intel_pt.h perf/x86/intel/pt: Add a capability and config bit for disabling TNTs 2022-02-15 17:47:11 +01:00
intel_punit_ipc.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
intel_scu_ipc.h x86/platform/intel-mid: Get rid of intel_scu_ipc_legacy.h 2021-02-15 20:10:30 +01:00
intel_telemetry.h platform/x86: intel_pmc_ipc: Convert to MFD 2020-04-24 11:18:44 +01:00
invpcid.h x86/cpu: Use INVPCID mnemonic in invpcid.h 2020-05-12 16:05:30 +02:00
io.h arch/*/: remove CONFIG_VIRT_TO_BUS 2022-06-28 13:20:21 +02:00
io_apic.h x86/ioapic: Handle Extended Destination ID field in RTE 2020-10-28 20:26:28 +01:00
io_bitmap.h x86/ioperm: Fix io bitmap invalidation on Xen PV 2020-07-18 12:31:49 +02:00
iomap.h io-mapping: Cleanup atomic iomap 2020-11-06 23:14:58 +01:00
iommu.h iommu/vt-d: Allow NVS regions in arch_rmrr_sanity_check() 2022-10-21 10:49:35 +02:00
iosf_mbi.h media: atomisp: move CCK endpoint address to generic header 2020-07-18 07:17:16 +02:00
irq.h Rework of the X86 irq stack handling: 2021-02-24 16:32:23 -08:00
irq_remapping.h x86/apic/msi: Remove arch_create_remap_msi_irq_domain() 2022-12-05 22:22:33 +01:00
irq_stack.h x86/percpu: Move irq_stack variables next to current_task 2022-10-17 16:41:05 +02:00
irq_vectors.h x86/irq: Add and use NR_EXTERNAL_VECTORS and NR_SYSTEM_VECTORS 2021-05-21 12:36:44 +02:00
irq_work.h x86/entry: Convert various system vectors 2020-06-11 15:15:14 +02:00
irqdomain.h x86/apic: Remove X86_IRQ_ALLOC_CONTIGUOUS_VECTORS 2022-11-17 15:15:22 +01:00
irqflags.h objtool/idle: Validate __cpuidle code as noinstr 2023-01-13 11:48:15 +01:00
ist.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 118 2019-05-24 17:39:02 +02:00
jailhouse_para.h x86/jailhouse: Fix incorrect SPDX identifier 2018-04-23 10:17:28 +02:00
jump_label.h objtool: Make jump label hack optional 2022-04-22 12:32:04 +02:00
kasan.h x86/kasan: Map shadow for percpu pages on demand 2022-12-15 10:37:26 -08:00
kaslr.h x86/mm: simplify init_trampoline() and surrounding logic 2020-06-09 09:39:13 -07:00
kbdleds.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Kbuild x86/syscalls: Switch to generic syscalltbl.sh 2021-05-20 15:03:58 +02:00
kdebug.h x86/dumpstack: Add log_lvl to __show_regs() 2020-07-22 23:56:53 +02:00
kexec-bzimage64.h kexec_file,x86,powerpc: factor out kexec_file_ops functions 2018-04-13 17:10:27 -07:00
kexec.h kexec: drop weak attribute from functions 2022-07-15 12:21:16 -04:00
kfence.h kfence, x86: only define helpers if !MODULE 2021-07-30 17:09:01 +02:00
kgdb.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
kmsan.h x86: kmsan: handle CPU entry area 2022-10-03 14:03:26 -07:00
kprobes.h x86/kprobes: Remove unused arch_kprobe_override_function() declaration 2022-09-26 13:20:52 -04:00
kvm-x86-ops.h Merge branch 'kvm-lapic-fix-and-cleanup' into HEAD 2023-01-24 06:08:01 -05:00
kvm-x86-pmu-ops.h KVM: x86/pmu: Drop amd_event_mapping[] in the KVM context 2022-06-08 04:49:06 -04:00
kvm_host.h KVM/arm64 updates for 6.3 2023-02-20 06:12:42 -05:00
kvm_page_track.h KVM: x86/mmu: Propagate memslot const qualifier 2021-12-08 04:24:43 -05:00
kvm_para.h x86/tdx: Wire up KVM hypercalls 2022-04-07 08:27:52 -07:00
kvm_types.h KVM: Move x86's version of struct kvm_mmu_memory_cache to common code 2020-07-09 13:29:42 -04:00
kvm_vcpu_regs.h KVM: x86: Explicitly #define the VCPU_REGS_* indices 2019-02-20 22:47:38 +01:00
kvmclock.h sched/clock/x86: Mark sched_clock() noinstr 2023-01-31 15:01:47 +01:00
linkage.h x86/ibt: Implement FineIBT 2022-11-01 13:44:10 +01:00
local.h x86/asm: 'Simplify' GEN_*_RMWcc() macros 2018-10-16 17:33:54 +02:00
mach_timer.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mach_traps.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
math_emu.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mc146818rtc.h x86/rtc: Rename mach_set_rtc_mmss() to mach_set_cmos_time() 2022-08-14 11:24:29 +02:00
mce.h x86/mce: Mask out non-address bits from machine check bank 2023-01-10 11:47:07 +01:00
mem_encrypt.h x86/mm: move protection_map[] inside the platform 2022-07-17 17:14:38 -07:00
memtype.h x86: Decouple PAT and MTRR handling 2022-11-10 13:12:45 +01:00
microcode.h x86/microcode/AMD: Add a @cpu parameter to the reloading functions 2023-02-06 12:14:20 +01:00
microcode_amd.h x86/microcode/AMD: Add a @cpu parameter to the reloading functions 2023-02-06 12:14:20 +01:00
microcode_intel.h platform/x86/intel/ifs: Use generic microcode headers and functions 2022-11-19 11:12:06 +01:00
misc.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mmconfig.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mmu.h x86/mm: Convert mmu context ia32_compat into a proper flags field 2020-10-26 13:46:47 +01:00
mmu_context.h x86/gsseg: Move load_gs_index() to its own new header file 2023-01-12 13:06:36 +01:00
mmzone.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mmzone_32.h x86/mm: Drop deprecated DISCONTIGMEM support for 32-bit 2020-05-28 18:34:30 +02:00
mmzone_64.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
module.h arch: split MODULE_ARCH_VERMAGIC definitions out to <asm/vermagic.h> 2020-04-23 10:50:26 +09:00
mpspec.h x86/init: Remove unused init ops 2020-09-16 16:52:28 +02:00
mpspec_def.h x86: Introduce and use MP IRQ trigger and polarity defines 2018-01-14 21:11:54 +01:00
mshyperv.h x86/hyperv: Fix hv_get/set_register for nested bringup 2023-02-16 14:32:37 +00:00
msi.h x86/apic/msi: Enable MSI_FLAG_PCI_MSIX_ALLOC_DYN 2022-12-05 22:22:34 +01:00
msr-index.h - Cache the AMD debug registers in per-CPU variables to avoid MSR writes 2023-02-21 14:51:40 -08:00
msr-trace.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
msr.h x86/boot: Introduce helpers for MSR reads/writes 2022-04-06 12:59:17 +02:00
mtrr.h x86/mtrr: Add a stop_machine() handler calling only cache_cpu_init() 2022-11-10 13:12:45 +01:00
mwait.h cpuidle, mwait: Make the mwait code noinstr clean 2023-01-13 11:48:16 +01:00
nmi.h x86/nmi: Make register_nmi_handler() more robust 2022-05-17 09:25:25 +02:00
nops.h x86/asm: Use _ASM_BYTES() in <asm/nops.h> 2021-05-10 12:33:28 +02:00
nospec-branch.h x86: Fix FILL_RETURN_BUFFER 2023-02-23 09:21:37 +01:00
numa.h ACPI updates for 5.10-rc1 2020-10-14 11:42:04 -07:00
numa_32.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
olpc.h Platform: OLPC: Move EC-specific functionality out from x86 2019-05-20 17:27:08 +03:00
olpc_ofw.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
orc_lookup.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13 2019-05-21 11:28:45 +02:00
orc_types.h x86/unwind/orc: Add 'signal' field to ORC metadata 2023-02-11 12:37:51 +01:00
page.h mm: add vma_alloc_zeroed_movable_folio() 2023-02-02 22:33:18 -08:00
page_32.h mm, arch: add generic implementation of pfn_valid() for FLATMEM 2023-02-09 16:51:41 -08:00
page_32_types.h x86/build: Fix vmlinux size check on 64-bit 2020-10-29 21:54:35 +01:00
page_64.h mm, arch: add generic implementation of pfn_valid() for FLATMEM 2023-02-09 16:51:41 -08:00
page_64_types.h x86: Increase exception stack sizes 2021-09-21 13:57:43 +02:00
page_types.h x86/mm: Remove P*D_PAGE_MASK and P*D_PAGE_SIZE macros 2022-12-15 10:37:27 -08:00
paravirt.h sched/clock/x86: Mark sched_clock() noinstr 2023-01-31 15:01:47 +01:00
paravirt_api_clock.h sched/headers: Add initial new headers as identity mappings 2022-02-23 10:58:28 +01:00
paravirt_types.h x86/paravirt: Remove clobber bitmask from .parainstructions 2022-11-24 13:53:54 +01:00
parport.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pc-conf-reg.h x86: Add support for 0x22/0x23 port I/O configuration space 2021-08-10 23:31:43 +02:00
pci-direct.h PCI: Make early dump functionality generic 2018-06-29 20:06:07 -05:00
pci-functions.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pci.h x86/apic/vector: Provide MSI parent domain 2022-12-05 22:22:33 +01:00
pci_x86.h x86/PCI: Revert "x86/PCI: Clip only host bridge windows for E820 regions" 2022-06-17 14:24:14 -05:00
percpu.h x86/percpu: Remove volatile from arch_raw_cpu_ptr(). 2022-04-05 09:59:38 +02:00
perf_event.h Scheduler updates in this cycle are: 2023-02-20 17:41:08 -08:00
perf_event_p4.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pgalloc.h mm/thp: define default pmd_pgtable() 2021-07-01 11:06:03 -07:00
pgtable-2level.h x86/mm: support __HAVE_ARCH_PTE_SWP_EXCLUSIVE also on 32bit 2023-02-02 22:33:10 -08:00
pgtable-2level_types.h x86/mm/32: implement arch_sync_kernel_mappings() 2020-06-02 10:59:11 -07:00
pgtable-3level.h x86/mm: support __HAVE_ARCH_PTE_SWP_EXCLUSIVE also on 32bit 2023-02-02 22:33:10 -08:00
pgtable-3level_types.h x86/mm/pae: Make pmd_t similar to pte_t 2022-12-15 10:37:27 -08:00
pgtable-invert.h x86/speculation/l1tf: Exempt zeroed PTEs from inversion 2018-08-17 10:27:36 -07:00
pgtable.h mm: remove __HAVE_ARCH_PTE_SWP_EXCLUSIVE 2023-02-02 22:33:11 -08:00
pgtable_32.h mm: remove kern_addr_valid() completely 2022-11-08 17:37:18 -08:00
pgtable_32_areas.h mm, x86/mm: Untangle address space layout definitions from basic pgtable type definitions 2019-12-10 10:12:55 +01:00
pgtable_32_types.h mm, x86/mm: Untangle address space layout definitions from basic pgtable type definitions 2019-12-10 10:12:55 +01:00
pgtable_64.h mm: remove kern_addr_valid() completely 2022-11-08 17:37:18 -08:00
pgtable_64_types.h x86/mm/pae: Make pmd_t similar to pte_t 2022-12-15 10:37:27 -08:00
pgtable_areas.h x86/mm: Randomize per-cpu entry area 2022-12-15 10:37:26 -08:00
pgtable_types.h x86/mm/pae: Make pmd_t similar to pte_t 2022-12-15 10:37:27 -08:00
pkeys.h x86/pkeys: Remove __arch_set_user_pkey_access() declaration 2022-04-04 15:58:24 -07:00
pkru.h x86/pkey: Fix undefined behaviour with PKRU_WD_BIT 2021-12-19 22:44:34 +01:00
platform_sst_audio.h sfi: Remove framework for deprecated firmware 2021-02-15 20:09:46 +01:00
pm-trace.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
posix_types.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
preempt.h x86/percpu: Move preempt_count next to current_task 2022-10-17 16:41:04 +02:00
probe_roms.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
processor-cyrix.h x86: Add support for 0x22/0x23 port I/O configuration space 2021-08-10 23:31:43 +02:00
processor-flags.h x86/mm: Fix CR3_ADDR_MASK 2022-12-15 10:37:28 -08:00
processor.h - Add getcpu support for the 32-bit version of the vDSO 2023-02-21 08:54:41 -08:00
prom.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
proto.h - Serious sanitization and cleanup of the whole APERF/MPERF and 2022-05-23 18:17:09 -07:00
pti.h x86: Use the correct SPDX License Identifier in headers 2019-10-01 20:31:35 +02:00
ptrace.h x86/sev: Mark the code returning to user space as syscall gap 2022-05-19 10:56:46 +02:00
purgatory.h x86/kdump: Remove the backup region handling 2019-11-14 18:24:43 +01:00
pvclock-abi.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pvclock.h sched/clock/x86: Mark sched_clock() noinstr 2023-01-31 15:01:47 +01:00
qrwlock.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
qspinlock.h x86/qspinlock, kcsan: Instrument barrier of pv_queued_spin_unlock() 2021-12-09 16:42:28 -08:00
qspinlock_paravirt.h x86/paravirt: Use common macro for creating simple asm paravirt functions 2022-11-24 13:56:44 +01:00
realmode.h x86/boot: Skip realmode init code when running as Xen PV guest 2022-11-25 12:05:22 +01:00
reboot.h x86/crash: Disable virt in core NMI crash handler to avoid double shootdown 2023-01-24 10:05:21 -08:00
reboot_fixups.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
required-features.h x86/cpu, kvm: Add support for CPUID_80000021_EAX 2023-01-25 12:33:06 +01:00
resctrl.h x86/resctl: fix scheduler confusion with 'current' 2023-03-08 11:48:11 -08:00
rmwcc.h asm goto: eradicate CC_HAS_ASM_GOTO 2022-08-21 10:06:28 -07:00
seccomp.h x86: Enable seccomp architecture tracking 2020-11-20 11:16:34 -08:00
sections.h x86/setup: Fix static memory detection 2020-03-19 11:58:13 +01:00
segment.h x86/cpu: Provide the full setup for getcpu() on x86-32 2023-02-06 15:48:54 +01:00
serial.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
set_memory.h x86/mm: Implement native set_memory_rox() 2022-12-15 10:37:27 -08:00
setup.h x86/xen: Use clear_bss() for Xen PV guests 2022-07-01 10:57:52 +02:00
setup_arch.h
sev-common.h x86/sev: Provide support for SNP guest request NAEs 2022-04-07 16:47:12 +02:00
sev.h x86/sev: Mark snp_abort() noreturn 2022-08-25 15:54:03 +02:00
sgx.h x86/sgx: Allow enclaves to use Asynchrounous Exit Notification 2022-11-04 15:33:30 -07:00
shmparam.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sigcontext.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sigframe.h x86/signal: Introduce helpers to get the maximum signal frame size 2021-05-19 11:46:27 +02:00
sighandling.h x86/signal: Add ABI prefixes to frame setup functions 2022-10-19 09:58:49 +02:00
signal.h x86/signal: Remove sigset_t parameter from frame setup functions 2022-10-19 09:58:48 +02:00
simd.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
smap.h x86/cpu: Remove CONFIG_X86_SMAP and "nosmap" 2022-04-04 10:16:57 +02:00
smp.h x86/percpu: Move cpu_number next to current_task 2022-10-17 16:41:04 +02:00
softirq_stack.h x86/softirq/64: Inline do_softirq_own_stack() 2021-02-10 23:34:17 +01:00
sparsemem.h x86: add missing include to sparsemem.h 2022-10-03 14:03:17 -07:00
spec-ctrl.h x86, KVM: remove unnecessary argument to x86_virt_spec_ctrl and callers 2022-11-09 12:26:51 -05:00
special_insns.h - Cache the AMD debug registers in per-CPU variables to avoid MSR writes 2023-02-21 14:51:40 -08:00
spinlock.h Merge branch 'linus' into locking/core, to resolve conflicts 2017-11-07 10:32:44 +01:00
spinlock_types.h x86/spinlock: Remove obsolete ticket spinlock macros and types 2020-05-28 21:18:40 +02:00
sta2x11.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
stackprotector.h stackprotector: actually use get_random_canary() 2022-11-18 02:18:10 +01:00
stacktrace.h x86/mm/64: Improve stack overflow warnings 2021-09-21 13:57:43 +02:00
static_call.h x86/retbleed: Add fine grained Kconfig knobs 2022-06-29 17:43:41 +02:00
string.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
string_32.h x86/mmx_32: Remove X86_USE_3DNOW 2021-12-11 09:09:45 +01:00
string_64.h kasan, x86: don't rename memintrinsics in uninstrumented files 2023-03-02 21:54:22 -08:00
suspend.h x86, hibernate: Rename temp_level4_pgt to temp_pgt 2018-10-03 11:56:34 +02:00
suspend_32.h x86/pm: Fix false positive kmemleak report in msr_build_context() 2022-04-27 13:55:19 +02:00
suspend_64.h x86/pm: Fix false positive kmemleak report in msr_build_context() 2022-04-27 13:55:19 +02:00
svm.h x86/hyperv: KVM: Rename "hv_enlightenments" to "hv_vmcb_enlightenments" 2022-11-18 12:58:59 -05:00
switch_to.h x86/cpu: Drop 32-bit Xen PV guest code in update_task_stack() 2022-11-22 16:14:15 +01:00
sync_bitops.h x86/asm: Modernize sync_bitops.h 2019-04-10 09:53:31 +02:00
sync_core.h x86/membarrier: Get rid of a dubious optimization 2020-12-09 09:37:42 +01:00
syscall.h arch: remove unused function syscall_set_arguments() 2021-09-14 16:06:20 +02:00
syscall_wrapper.h x86/syscall: Include asm/ptrace.h in syscall_wrapper header 2022-10-24 17:57:28 +02:00
syscalls.h x86: Remove unneeded includes 2020-03-21 16:03:25 +01:00
tdx.h x86/tdx: Add a wrapper to get TDREPORT0 from the TDX Module 2022-11-17 11:03:09 -08:00
text-patching.h x86/alternatives: Introduce int3_emulate_jcc() 2023-01-31 15:05:30 +01:00
thermal.h x86/thermal: Fix LVT thermal setup for SMI delivery mode 2021-05-31 22:32:26 +02:00
thread_info.h x86: Suppress KMSAN reports in arch_within_stack_frames() 2023-01-27 09:00:56 -08:00
time.h clocksource: Verify HPET and PMTMR when TSC unverified 2023-02-02 14:23:02 -08:00
timer.h Merge branch 'x86-timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-11-13 19:07:38 -08:00
timex.h x86/tsc: Use fallback for random_get_entropy() instead of zero 2022-05-13 23:59:23 +02:00
tlb.h mmu_gather: Remove per arch tlb_{start,end}_vma() 2022-07-21 10:50:13 -07:00
tlbbatch.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tlbflush.h - Rename a PKRU macro to make more sense when reading the code 2022-08-01 09:34:39 -07:00
topology.h x86/aperfperf: Make it correct on 32bit and UP kernels 2022-05-02 09:19:05 +02:00
trace_clock.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
trap_pf.h x86/mm: Signal SIGSEGV with PF_SGX 2020-11-17 14:36:13 +01:00
trapnr.h x86/boot/compressed/64: Add stage1 #VC handler 2020-09-07 19:45:25 +02:00
traps.h x86/traps: Use pt_regs directly in fixup_bad_iret() 2022-05-03 11:18:59 +02:00
tsc.h x86/tsc: Use fallback for random_get_entropy() instead of zero 2022-05-13 23:59:23 +02:00
uaccess.h x86: asm: make sure __put_user_size() evaluates pointer once 2022-10-28 13:37:23 -07:00
uaccess_32.h x86: get rid of small constant size cases in raw_copy_{to,from}_user() 2020-03-18 15:53:25 -04:00
uaccess_64.h x86/clear_user: Make it faster 2022-08-18 12:36:42 +02:00
umip.h x86/Kconfig: Rename UMIP config parameter 2019-11-07 11:07:29 +01:00
unistd.h fs: stat: compat: Add __ARCH_WANT_COMPAT_STAT 2022-04-26 13:35:45 -07:00
unwind.h x86,rethook,kprobes: Replace kretprobe with rethook on x86 2022-03-28 19:38:51 -07:00
unwind_hints.h x86/unwind/orc: Add 'signal' field to ORC metadata 2023-02-11 12:37:51 +01:00
uprobes.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
user.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
user32.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
user_32.h asm/user.h: killed unused macros 2022-01-30 21:17:00 -05:00
user_64.h asm/user.h: killed unused macros 2022-01-30 21:17:00 -05:00
vdso.h x86/vdso: Move VDSO image init to vdso2c generated code 2023-01-25 12:33:40 +01:00
vermagic.h arch: split MODULE_ARCH_VERMAGIC definitions out to <asm/vermagic.h> 2020-04-23 10:50:26 +09:00
vga.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
vgtod.h um: Fix header inclusion 2020-03-23 18:45:14 +01:00
virtext.h x86/virt: Force GIF=1 prior to disabling SVM (for reboot flows) 2023-01-24 10:05:21 -08:00
vm86.h x86/vm86/32: Remove VM86_SCREEN_BITMAP support 2021-01-21 20:08:53 +01:00
vmalloc.h mm/vmalloc: provide fallback arch huge vmap support functions 2021-04-30 11:20:40 -07:00
vmware.h x86/cpu/vmware: Fix platform detection VMWARE_PORT macro 2019-10-22 00:51:44 +02:00
vmx.h kvm: vmx: keep constant definition format consistent 2022-09-30 07:11:17 -04:00
vmxfeatures.h KVM: VMX: Enable Notify VM exit 2022-06-08 05:56:24 -04:00
vsyscall.h x86/vsyscall: Show something useful on a read fault 2019-06-28 00:04:39 +02:00
vvar.h x86/vdso: Add time napespace page 2020-01-14 12:20:58 +01:00
word-at-a-time.h x86: simplify load_unaligned_zeropad() implementation 2022-08-16 11:03:38 -07:00
x86_init.h x86/boot: Skip realmode init code when running as Xen PV guest 2022-11-25 12:05:22 +01:00
xor.h lib/xor: make xor prototypes more friendly to compiler vectorization 2022-02-11 20:39:39 +11:00
xor_32.h lib/xor: make xor prototypes more friendly to compiler vectorization 2022-02-11 20:39:39 +11:00
xor_64.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
xor_avx.h lib/xor: make xor prototypes more friendly to compiler vectorization 2022-02-11 20:39:39 +11:00