Commit a8071417 authored Apr 28, 2018 by Konrad Rzeszutek Wilk Committed by Greg Kroah-Hartman May 22, 2018

x86/cpufeatures: Add X86_FEATURE_RDS



commit 0cc5fa00b0a88dad140b4e5c2cead9951ad36822 upstream

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>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 24e4dd97

arch/x86/include/asm/cpufeatures.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -306,6 +306,7 @@
		#define X86_FEATURE_SPEC_CTRL (1832+26) / "" Speculation Control (IBRS + IBPB) */
		#define X86_FEATURE_INTEL_STIBP (1832+27) / "" Single Thread Indirect Branch Predictors */
		#define X86_FEATURE_ARCH_CAPABILITIES (1832+29) / IA32_ARCH_CAPABILITIES MSR (Intel) */
		#define X86_FEATURE_RDS (1832+31) / Reduced Data Speculation */

		/*
		* BUG word(s)