linux-stable/arch/x86/lib
Linus Torvalds 877934769e - Cache the AMD debug registers in per-CPU variables to avoid MSR writes
where possible, when supporting a debug registers swap feature for
   SEV-ES guests
 
 - Add support for AMD's version of eIBRS called Automatic IBRS which is
   a set-and-forget control of indirect branch restriction speculation
   resources on privilege change
 
 - Add support for a new x86 instruction - LKGS - Load kernel GS which is
   part of the FRED infrastructure
 
 - Reset SPEC_CTRL upon init to accomodate use cases like kexec which
   rediscover
 
 - Other smaller fixes and cleanups
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Merge tag 'x86_cpu_for_v6.3_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 cpuid updates from Borislav Petkov:

 - Cache the AMD debug registers in per-CPU variables to avoid MSR
   writes where possible, when supporting a debug registers swap feature
   for SEV-ES guests

 - Add support for AMD's version of eIBRS called Automatic IBRS which is
   a set-and-forget control of indirect branch restriction speculation
   resources on privilege change

 - Add support for a new x86 instruction - LKGS - Load kernel GS which
   is part of the FRED infrastructure

 - Reset SPEC_CTRL upon init to accomodate use cases like kexec which
   rediscover

 - Other smaller fixes and cleanups

* tag 'x86_cpu_for_v6.3_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/amd: Cache debug register values in percpu variables
  KVM: x86: Propagate the AMD Automatic IBRS feature to the guest
  x86/cpu: Support AMD Automatic IBRS
  x86/cpu, kvm: Add the SMM_CTL MSR not present feature
  x86/cpu, kvm: Add the Null Selector Clears Base feature
  x86/cpu, kvm: Move X86_FEATURE_LFENCE_RDTSC to its native leaf
  x86/cpu, kvm: Add the NO_NESTED_DATA_BP feature
  KVM: x86: Move open-coded CPUID leaf 0x80000021 EAX bit propagation code
  x86/cpu, kvm: Add support for CPUID_80000021_EAX
  x86/gsseg: Add the new <asm/gsseg.h> header to <asm/asm-prototypes.h>
  x86/gsseg: Use the LKGS instruction if available for load_gs_index()
  x86/gsseg: Move load_gs_index() to its own new header file
  x86/gsseg: Make asm_load_gs_index() take an u16
  x86/opcode: Add the LKGS instruction to x86-opcode-map
  x86/cpufeature: Add the CPU feature bit for LKGS
  x86/bugs: Reset speculation control settings on init
  x86/cpu: Remove redundant extern x86_read_arch_cap_msr()
2023-02-21 14:51:40 -08:00
..
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
atomic64_32.c
atomic64_386_32.S x86: Prepare asm files for straight-line-speculation 2021-12-08 12:25:37 +01:00
atomic64_cx8_32.S x86: Prepare asm files for straight-line-speculation 2021-12-08 12:25:37 +01:00
cache-smp.c smp: Remove smp_call_function() and on_each_cpu() return values 2019-06-23 14:26:26 +02:00
checksum_32.S x86/checksum_32: Remove .fixup usage 2021-12-11 09:09:49 +01:00
clear_page_64.S x86/clear_user: Make it faster 2022-08-18 12:36:42 +02:00
cmdline.c x86/lib: Fix compiler and kernel-doc warnings 2023-01-03 18:46:21 +01:00
cmpxchg8b_emu.S x86: Prepare asm files for straight-line-speculation 2021-12-08 12:25:37 +01:00
cmpxchg16b_emu.S x86: Prepare asm files for straight-line-speculation 2021-12-08 12:25:37 +01:00
copy_mc.c x86, libnvdimm/test: Remove COPY_MC_TEST 2020-10-26 18:08:35 +01:00
copy_mc_64.S x86/copy_mc_64: Remove .fixup usage 2021-12-11 09:09:46 +01:00
copy_page_64.S x86: Prepare asm files for straight-line-speculation 2021-12-08 12:25:37 +01:00
copy_user_64.S x86/uaccess: Don't jump between functions 2022-04-19 21:58:53 +02:00
cpu.c x86/lib/cpu: Address missing prototypes warning 2019-08-08 08:25:53 +02:00
csum-copy_64.S x86: Prepare asm files for straight-line-speculation 2021-12-08 12:25:37 +01:00
csum-partial_64.c uml/x86: use x86 load_unaligned_zeropad() 2022-01-30 21:26:39 -05:00
csum-wrappers_64.c net: unexport csum_and_copy_{from,to}_user 2022-04-29 14:37:59 -07:00
delay.c x86/delay: Fix the wrong asm constraint in delay_loop() 2022-04-05 21:21:57 +02:00
error-inject.c x86/error_inject: Align function properly 2022-10-17 16:40:59 +02:00
getuser.S x86: Prepare asm files for straight-line-speculation 2021-12-08 12:25:37 +01:00
hweight.S x86: Prepare asm files for straight-line-speculation 2021-12-08 12:25:37 +01:00
inat.c x86/insn: Add a __ignore_sync_check__ marker 2021-03-15 11:00:57 +01:00
insn-eval.c x86/insn: Avoid namespace clash by separating instruction decoder MMIO type from MMIO trace type 2023-01-03 18:46:06 +01:00
insn.c x86/insn: Use get_unaligned() instead of memcpy() 2021-10-06 11:56:37 +02:00
iomap_copy_64.S x86/asm: Fix an assembler warning with current binutils 2023-01-03 17:55:11 +01:00
iomem.c x86: kmsan: handle open-coded assembly in lib/iomem.c 2022-10-03 14:03:24 -07:00
kaslr.c x86/kaslr: Fix build warning in KASLR code in boot stub 2022-04-11 09:41:12 +02:00
Makefile x86/mem: Move memmove to out of line assembler 2022-11-01 15:44:07 -07:00
memcpy_32.c x86/mem: Move memmove to out of line assembler 2022-11-01 15:44:07 -07:00
memcpy_64.S entry, kasan, x86: Disallow overriding mem*() functions 2023-01-13 11:48:17 +01:00
memmove_32.S x86/mem: Move memmove to out of line assembler 2022-11-01 15:44:07 -07:00
memmove_64.S entry, kasan, x86: Disallow overriding mem*() functions 2023-01-13 11:48:17 +01:00
memset_64.S entry, kasan, x86: Disallow overriding mem*() functions 2023-01-13 11:48:17 +01:00
misc.c x86/lib: Include <asm/misc.h> to fix a missing prototypes warning at build time 2023-01-03 11:11:03 +01:00
msr-reg-export.c
msr-reg.S x86: Prepare asm files for straight-line-speculation 2021-12-08 12:25:37 +01:00
msr-smp.c x86/msr: Fix wr/rdmsr_safe_regs_on_cpu() prototypes 2021-03-22 21:37:03 +01:00
msr.c x86/msr: Make locally used functions static 2021-04-08 11:57:40 +02:00
pc-conf-reg.c x86: Add support for 0x22/0x23 port I/O configuration space 2021-08-10 23:31:43 +02:00
putuser.S x86/putuser: Provide room for padding 2022-10-17 16:41:10 +02:00
retpoline.S x86/calldepth: Add ret/call counting for debug 2022-10-17 16:41:16 +02:00
string_32.c lib/string: Move helper functions out of string.c 2021-09-25 08:20:49 -07:00
strstr_32.c
usercopy.c x86/uaccess: instrument copy_from_user_nmi() 2022-11-08 15:57:24 -08:00
usercopy_32.c x86/usercopy: Remove .fixup usage 2021-12-11 09:09:50 +01:00
usercopy_64.c x86/clear_user: Make it faster 2022-08-18 12:36:42 +02:00
x86-opcode-map.txt x86/opcode: Add the LKGS instruction to x86-opcode-map 2023-01-12 13:06:36 +01:00