diff options
Diffstat (limited to 'common/recipes-kernel/linux/linux-yocto-4.9.21/0067-x86-cpufeatures-Add-FEATURE_ZEN.patch')
| -rw-r--r-- | common/recipes-kernel/linux/linux-yocto-4.9.21/0067-x86-cpufeatures-Add-FEATURE_ZEN.patch | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.9.21/0067-x86-cpufeatures-Add-FEATURE_ZEN.patch b/common/recipes-kernel/linux/linux-yocto-4.9.21/0067-x86-cpufeatures-Add-FEATURE_ZEN.patch new file mode 100644 index 00000000..4dc85820 --- /dev/null +++ b/common/recipes-kernel/linux/linux-yocto-4.9.21/0067-x86-cpufeatures-Add-FEATURE_ZEN.patch @@ -0,0 +1,48 @@ +From c9b69035094a1cadce0c634ad76ded5a4a033ff6 Mon Sep 17 00:00:00 2001 +From: Thomas Gleixner <tglx@linutronix.de> +Date: Thu, 10 May 2018 16:26:00 +0200 +Subject: [PATCH 67/93] x86/cpufeatures: Add FEATURE_ZEN + +commit d1035d971829dcf80e8686ccde26f94b0a069472 upstream + +Add a ZEN feature bit so family-dependent static_cpu_has() optimizations +can be built for ZEN. + +Signed-off-by: Thomas Gleixner <tglx@linutronix.de> +Reviewed-by: Borislav Petkov <bp@suse.de> +Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> +Signed-off-by: David Woodhouse <dwmw@amazon.co.uk> +Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +--- + arch/x86/include/asm/cpufeatures.h | 2 ++ + arch/x86/kernel/cpu/amd.c | 1 + + 2 files changed, 3 insertions(+) + +diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h +index d071767..ec87b8c 100644 +--- a/arch/x86/include/asm/cpufeatures.h ++++ b/arch/x86/include/asm/cpufeatures.h +@@ -212,6 +212,8 @@ + #define X86_FEATURE_IBRS ( 7*32+25) /* Indirect Branch Restricted Speculation */ + #define X86_FEATURE_IBPB ( 7*32+26) /* Indirect Branch Prediction Barrier */ + #define X86_FEATURE_STIBP ( 7*32+27) /* Single Thread Indirect Branch Predictors */ ++#define X86_FEATURE_ZEN ( 7*32+28) /* "" CPU is AMD family 0x17 (Zen) */ ++ + + /* Virtualization flags: Linux defined, word 8 */ + #define X86_FEATURE_TPR_SHADOW ( 8*32+ 0) /* Intel TPR Shadow */ +diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c +index 21367b5..4c2be99 100644 +--- a/arch/x86/kernel/cpu/amd.c ++++ b/arch/x86/kernel/cpu/amd.c +@@ -751,6 +751,7 @@ static void init_amd_bd(struct cpuinfo_x86 *c) + + static void init_amd_zn(struct cpuinfo_x86 *c) + { ++ set_cpu_cap(c, X86_FEATURE_ZEN); + /* + * Fix erratum 1076: CPB feature bit not being set in CPUID. It affects + * all up to and including B1. +-- +2.7.4 + |