Commit 0aa48468 authored May 21, 2018 by Konrad Rzeszutek Wilk Committed by Thomas Gleixner May 23, 2018

KVM/VMX: Expose SSBD properly to guests



The X86_FEATURE_SSBD is an synthetic CPU feature - that is
it bit location has no relevance to the real CPUID 0x7.EBX[31]
bit position. For that we need the new CPU feature name.

Fixes: 52817587 ("x86/cpufeatures: Disentangle SSBD enumeration")
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: kvm@vger.kernel.org
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: stable@vger.kernel.org
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Link: https://lkml.kernel.org/r/20180521215449.26423-2-konrad.wilk@oracle.com

parent 3b78ce4a

arch/x86/kvm/cpuid.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -407,8 +407,8 @@ static inline int __do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,

		/* cpuid 7.0.edx*/
		const u32 kvm_cpuid_7_0_edx_x86_features =
		F(AVX512_4VNNIW) \| F(AVX512_4FMAPS) \| F(SPEC_CTRL) \| F(SSBD) \|
		F(ARCH_CAPABILITIES);
		F(AVX512_4VNNIW) \| F(AVX512_4FMAPS) \| F(SPEC_CTRL) \|
		F(SPEC_CTRL_SSBD) \| F(ARCH_CAPABILITIES);

		/* all calls to cpuid_count() should be made on the same cpu */
		get_cpu();

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