From: Borislav Petkov (AMD) Date: Wed, 15 Oct 2025 10:35:48 +0000 (+0200) Subject: x86/cpufeatures: Correct LKGS feature flag description X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=47955b58cf9b97fe4dc2b0d622b8ea3a2656bbf9;p=thirdparty%2Flinux.git x86/cpufeatures: Correct LKGS feature flag description Quotation marks in cpufeatures.h comments are special and when the comment begins with a quoted string, that string lands in /proc/cpuinfo, turning it into a user-visible one. The LKGS comment doesn't begin with a quoted string but just in case drop the quoted "kernel" in there to avoid confusion. And while at it, simply change the description into what the LKGS instruction does for more clarity. No functional changes. Reviewed-by: Xin Li (Intel) Signed-off-by: Borislav Petkov (AMD) Link: https://lore.kernel.org/r/20251015103548.10194-1-bp@kernel.org --- diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h index 4091a776e37aa..245cf6b3ec57d 100644 --- a/arch/x86/include/asm/cpufeatures.h +++ b/arch/x86/include/asm/cpufeatures.h @@ -320,7 +320,7 @@ #define X86_FEATURE_FSRS (12*32+11) /* Fast short REP STOSB */ #define X86_FEATURE_FSRC (12*32+12) /* Fast short REP {CMPSB,SCASB} */ #define X86_FEATURE_FRED (12*32+17) /* "fred" Flexible Return and Event Delivery */ -#define X86_FEATURE_LKGS (12*32+18) /* Load "kernel" (userspace) GS */ +#define X86_FEATURE_LKGS (12*32+18) /* Like MOV_GS except MSR_KERNEL_GS_BASE = GS.base */ #define X86_FEATURE_WRMSRNS (12*32+19) /* Non-serializing WRMSR */ #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 */ diff --git a/tools/arch/x86/include/asm/cpufeatures.h b/tools/arch/x86/include/asm/cpufeatures.h index 06fc0479a23f0..f61802f29d5f1 100644 --- a/tools/arch/x86/include/asm/cpufeatures.h +++ b/tools/arch/x86/include/asm/cpufeatures.h @@ -320,7 +320,7 @@ #define X86_FEATURE_FSRS (12*32+11) /* Fast short REP STOSB */ #define X86_FEATURE_FSRC (12*32+12) /* Fast short REP {CMPSB,SCASB} */ #define X86_FEATURE_FRED (12*32+17) /* "fred" Flexible Return and Event Delivery */ -#define X86_FEATURE_LKGS (12*32+18) /* Load "kernel" (userspace) GS */ +#define X86_FEATURE_LKGS (12*32+18) /* Like MOV_GS except MSR_KERNEL_GS_BASE = GS.base */ #define X86_FEATURE_WRMSRNS (12*32+19) /* Non-serializing WRMSR */ #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 */