diff options
Diffstat (limited to 'common/recipes-kernel/linux/linux-yocto-4.9.21/0010-x86-cpufeatures-Add-AMD-feature-bits-for-Speculation.patch')
-rw-r--r-- | common/recipes-kernel/linux/linux-yocto-4.9.21/0010-x86-cpufeatures-Add-AMD-feature-bits-for-Speculation.patch | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.9.21/0010-x86-cpufeatures-Add-AMD-feature-bits-for-Speculation.patch b/common/recipes-kernel/linux/linux-yocto-4.9.21/0010-x86-cpufeatures-Add-AMD-feature-bits-for-Speculation.patch new file mode 100644 index 00000000..9417a4ec --- /dev/null +++ b/common/recipes-kernel/linux/linux-yocto-4.9.21/0010-x86-cpufeatures-Add-AMD-feature-bits-for-Speculation.patch @@ -0,0 +1,51 @@ +From 3a855b66f0fb7388b32ed33a536b4f68cd09afc3 Mon Sep 17 00:00:00 2001 +From: David Woodhouse <dwmw@amazon.co.uk> +Date: Thu, 25 Jan 2018 16:14:11 +0000 +Subject: [PATCH 10/42] x86/cpufeatures: Add AMD feature bits for Speculation + Control + +(cherry picked from commit 5d10cbc91d9eb5537998b65608441b592eec65e7) + +AMD exposes the PRED_CMD/SPEC_CTRL MSRs slightly differently to Intel. +See http://lkml.kernel.org/r/2b3e25cc-286d-8bd0-aeaf-9ac4aae39de8@amd.com + +Signed-off-by: David Woodhouse <dwmw@amazon.co.uk> +Signed-off-by: Thomas Gleixner <tglx@linutronix.de> +Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +Cc: Tom Lendacky <thomas.lendacky@amd.com> +Cc: gnomes@lxorguk.ukuu.org.uk +Cc: ak@linux.intel.com +Cc: ashok.raj@intel.com +Cc: dave.hansen@intel.com +Cc: karahmed@amazon.de +Cc: arjan@linux.intel.com +Cc: torvalds@linux-foundation.org +Cc: peterz@infradead.org +Cc: bp@alien8.de +Cc: pbonzini@redhat.com +Cc: tim.c.chen@linux.intel.com +Cc: gregkh@linux-foundation.org +Link: https://lkml.kernel.org/r/1516896855-7642-4-git-send-email-dwmw@amazon.co.uk +Signed-off-by: David Woodhouse <dwmw@amazon.co.uk> +Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +--- + arch/x86/include/asm/cpufeatures.h | 3 +++ + 1 file changed, 3 insertions(+) + +diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h +index 1f03888..c4d03e7 100644 +--- a/arch/x86/include/asm/cpufeatures.h ++++ b/arch/x86/include/asm/cpufeatures.h +@@ -258,6 +258,9 @@ + /* AMD-defined CPU features, CPUID level 0x80000008 (ebx), word 13 */ + #define X86_FEATURE_CLZERO (13*32+0) /* CLZERO instruction */ + #define X86_FEATURE_IRPERF (13*32+1) /* Instructions Retired Count */ ++#define X86_FEATURE_AMD_PRED_CMD (13*32+12) /* Prediction Command MSR (AMD) */ ++#define X86_FEATURE_AMD_SPEC_CTRL (13*32+14) /* Speculation Control MSR only (AMD) */ ++#define X86_FEATURE_AMD_STIBP (13*32+15) /* Single Thread Indirect Branch Predictors (AMD) */ + + /* Thermal and Power Management Leaf, CPUID level 0x00000006 (eax), word 14 */ + #define X86_FEATURE_DTHERM (14*32+ 0) /* Digital Thermal Sensor */ +-- +2.7.4 + |