x86/cpufeatures: Add X86_FEATURE_RDS
authorKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Sat, 28 Apr 2018 20:34:17 +0000 (22:34 +0200)
committerThomas Gleixner <tglx@linutronix.de>
Thu, 3 May 2018 11:55:48 +0000 (13:55 +0200)
Add the CPU feature bit CPUID.7.0.EDX[31] which indicates whether the CPU
supports Reduced Data Speculation.

[ tglx: Split it out from a later patch ]

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
arch/x86/include/asm/cpufeatures.h

index 3493b58ef2cc7ee6df9ec2d4fa4f8befe4d04e85..48305a1ddfd6b0ec121af8b2583b5464e41cf1b8 100644 (file)
 #define X86_FEATURE_SPEC_CTRL          (18*32+26) /* "" Speculation Control (IBRS + IBPB) */
 #define X86_FEATURE_INTEL_STIBP                (18*32+27) /* "" Single Thread Indirect Branch Predictors */
 #define X86_FEATURE_ARCH_CAPABILITIES  (18*32+29) /* IA32_ARCH_CAPABILITIES MSR (Intel) */
+#define X86_FEATURE_RDS                        (18*32+31) /* Reduced Data Speculation */
 
 /*
  * BUG word(s)