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Commit 43462d90 authored by Konrad Rzeszutek Wilk's avatar Konrad Rzeszutek Wilk Committed by Greg Kroah-Hartman
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KVM/VMX: Expose SSBD properly to guests 



commit 0aa48468d00959c8a37cd3ac727284f4f7359151 upstream.

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: 52817587e706 ("x86/cpufeatures: Disentangle SSBD enumeration")
Signed-off-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: default avatarThomas 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


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent ec1975ac

arch/x86/kvm/cpuid.c

+1 −1
Original line number Diff line number Diff line
@@ -382,7 +382,7 @@ 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(SPEC_CTRL) | F(SSBD) | F(ARCH_CAPABILITIES);

		F(SPEC_CTRL) | F(SPEC_CTRL_SSBD) | F(ARCH_CAPABILITIES);



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

	get_cpu();