Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 4.9 28/31] KVM: VMX: Expose SSBD properly to guests, 4.9 supplement | Date | Tue, 12 Jun 2018 18:46:31 +0200 |
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4.9-stable review patch. If anyone has any objections, please let me know.
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From: Ben Hutchings <ben@decadent.org.uk>
Fix an additional misuse of X86_FEATURE_SSBD in guest_cpuid_has_spec_ctrl(). This function was introduced in the backport of SSBD support to 4.9 and is not present upstream, so it was not fixed by commit 43462d908821 "KVM: VMX: Expose SSBD properly to guests."
Fixes: 52817587e706 ("x86/cpufeatures: Disentangle SSBD enumeration") Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: David Woodhouse <dwmw@amazon.co.uk> Cc: kvm@vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- arch/x86/kvm/cpuid.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/kvm/cpuid.h +++ b/arch/x86/kvm/cpuid.h @@ -179,7 +179,7 @@ static inline bool guest_cpuid_has_spec_ if (best && (best->ebx & bit(X86_FEATURE_AMD_IBRS))) return true; best = kvm_find_cpuid_entry(vcpu, 7, 0); - return best && (best->edx & (bit(X86_FEATURE_SPEC_CTRL) | bit(X86_FEATURE_SSBD))); + return best && (best->edx & (bit(X86_FEATURE_SPEC_CTRL) | bit(X86_FEATURE_SPEC_CTRL_SSBD))); } static inline bool guest_cpuid_has_arch_capabilities(struct kvm_vcpu *vcpu)
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