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: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Borislav Petkov <bp@suse.de> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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@ -218,6 +218,7 @@
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#define X86_FEATURE_IBRS ( 7*32+25) /* Indirect Branch Restricted Speculation */
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#define X86_FEATURE_IBPB ( 7*32+26) /* Indirect Branch Prediction Barrier */
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#define X86_FEATURE_STIBP ( 7*32+27) /* Single Thread Indirect Branch Predictors */
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#define X86_FEATURE_ZEN ( 7*32+28) /* "" CPU is AMD family 0x17 (Zen) */
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/* Virtualization flags: Linux defined, word 8 */
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#define X86_FEATURE_TPR_SHADOW ( 8*32+ 0) /* Intel TPR Shadow */
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@ -812,6 +812,7 @@ static void init_amd_bd(struct cpuinfo_x86 *c)
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static void init_amd_zn(struct cpuinfo_x86 *c)
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{
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set_cpu_cap(c, X86_FEATURE_ZEN);
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/*
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* Fix erratum 1076: CPB feature bit not being set in CPUID. It affects
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* all up to and including B1.
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