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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.patch51
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
+