4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Ben Hutchings <b...@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 <b...@decadent.org.uk>
Cc: Konrad Rzeszutek Wilk <konrad.w...@oracle.com>
Cc: Thomas Gleixner <t...@linutronix.de>
Cc: David Woodhouse <d...@amazon.co.uk>
Cc: k...@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gre...@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)
