Commit d1035d97 authored by Thomas Gleixner's avatar Thomas Gleixner

x86/cpufeatures: Add FEATURE_ZEN

Add a ZEN feature bit so family-dependent static_cpu_has() optimizations
can be built for ZEN.
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Reviewed-by: default avatarBorislav Petkov <bp@suse.de>
Reviewed-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
parent 52817587
...@@ -218,6 +218,7 @@ ...@@ -218,6 +218,7 @@
#define X86_FEATURE_IBRS ( 7*32+25) /* Indirect Branch Restricted Speculation */ #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_IBPB ( 7*32+26) /* Indirect Branch Prediction Barrier */
#define X86_FEATURE_STIBP ( 7*32+27) /* Single Thread Indirect Branch Predictors */ #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 */ /* Virtualization flags: Linux defined, word 8 */
#define X86_FEATURE_TPR_SHADOW ( 8*32+ 0) /* Intel TPR Shadow */ #define X86_FEATURE_TPR_SHADOW ( 8*32+ 0) /* Intel TPR Shadow */
......
...@@ -812,6 +812,7 @@ static void init_amd_bd(struct cpuinfo_x86 *c) ...@@ -812,6 +812,7 @@ static void init_amd_bd(struct cpuinfo_x86 *c)
static void init_amd_zn(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 * Fix erratum 1076: CPB feature bit not being set in CPUID. It affects
* all up to and including B1. * all up to and including B1.
......
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