diff options
Diffstat (limited to 'meta-amd-bsp/recipes-kernel/linux/linux-yocto-5.15/0059-x86-cpufeatures-Add-AMD-Fam19h-Branch-Sampling-featu.patch')
| -rw-r--r-- | meta-amd-bsp/recipes-kernel/linux/linux-yocto-5.15/0059-x86-cpufeatures-Add-AMD-Fam19h-Branch-Sampling-featu.patch | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-5.15/0059-x86-cpufeatures-Add-AMD-Fam19h-Branch-Sampling-featu.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-5.15/0059-x86-cpufeatures-Add-AMD-Fam19h-Branch-Sampling-featu.patch new file mode 100644 index 00000000..335d75e5 --- /dev/null +++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-5.15/0059-x86-cpufeatures-Add-AMD-Fam19h-Branch-Sampling-featu.patch @@ -0,0 +1,33 @@ +From 3078e3a38ac059945f1ea3f318c47e3760256548 Mon Sep 17 00:00:00 2001 +From: Stephane Eranian <eranian@google.com> +Date: Tue, 22 Mar 2022 15:15:06 -0700 +Subject: [PATCH 59/86] x86/cpufeatures: Add AMD Fam19h Branch Sampling feature + +commit a77d41ac3a0f41c80120ec5b8b08ab284fec950a upstream + +Add a cpu feature for AMD Fam19h Branch Sampling feature as bit +31 of EBX on CPUID leaf function 0x80000008. + +Signed-off-by: Stephane Eranian <eranian@google.com> +Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> +Link: https://lore.kernel.org/r/20220322221517.2510440-3-eranian@google.com +Signed-off-by: Zhaolong Zhang <zhaolong.zhang@windriver.com> +--- + arch/x86/include/asm/cpufeatures.h | 1 + + 1 file changed, 1 insertion(+) + +diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h +index ebe6666bbc71..4ae869607697 100644 +--- a/arch/x86/include/asm/cpufeatures.h ++++ b/arch/x86/include/asm/cpufeatures.h +@@ -323,6 +323,7 @@ + #define X86_FEATURE_AMD_SSB_NO (13*32+26) /* "" Speculative Store Bypass is fixed in hardware. */ + #define X86_FEATURE_CPPC (13*32+27) /* Collaborative Processor Performance Control */ + #define X86_FEATURE_BTC_NO (13*32+29) /* "" Not vulnerable to Branch Type Confusion */ ++#define X86_FEATURE_BRS (13*32+31) /* Branch Sampling available */ + + /* Thermal and Power Management Leaf, CPUID level 0x00000006 (EAX), word 14 */ + #define X86_FEATURE_DTHERM (14*32+ 0) /* Digital Thermal Sensor */ +-- +2.37.3 + |