diff options
| author |   Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2023-03-12 14:25:58 +0300 |
|---|---|---|
| committer |   Dave Hansen <dave.hansen@linux.intel.com> | 2023-03-16 13:08:39 -0700 |
| commit | 6449dcb0cac738219d13c618af7fd8664735f99d (patch) | |
| tree | 246add8daa2a0ee4ab493b3a91c81bb0a4063ebd /arch/x86/include/asm/cpufeatures.h | |
| parent | x86: Allow atomic MM_CONTEXT flags setting (diff) | |
| download | wireguard-linux-6449dcb0cac738219d13c618af7fd8664735f99d.tar.xz wireguard-linux-6449dcb0cac738219d13c618af7fd8664735f99d.zip | |
x86: CPUID and CR3/CR4 flags for Linear Address Masking
Enumerate Linear Address Masking and provide defines for CR3 and CR4
flags.
The new CONFIG_ADDRESS_MASKING option enables the feature support in
kernel.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Alexander Potapenko <glider@google.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Alexander Potapenko <glider@google.com>
Link: https://lore.kernel.org/all/20230312112612.31869-4-kirill.shutemov%40linux.intel.com
Diffstat (limited to 'arch/x86/include/asm/cpufeatures.h')
| -rw-r--r-- | arch/x86/include/asm/cpufeatures.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h index 73c9672c123b..353b054812de 100644 --- a/arch/x86/include/asm/cpufeatures.h +++ b/arch/x86/include/asm/cpufeatures.h @@ -321,6 +321,7 @@ #define X86_FEATURE_LKGS (12*32+18) /* "" Load "kernel" (userspace) GS */ #define X86_FEATURE_AMX_FP16 (12*32+21) /* "" AMX fp16 Support */ #define X86_FEATURE_AVX_IFMA (12*32+23) /* "" Support for VPMADD52[H,L]UQ */ +#define X86_FEATURE_LAM (12*32+26) /* Linear Address Masking */ /* AMD-defined CPU features, CPUID level 0x80000008 (EBX), word 13 */ #define X86_FEATURE_CLZERO (13*32+ 0) /* CLZERO instruction */ |