* [PATCH 4.9 28/31] KVM: VMX: Expose SSBD properly to guests, 4.9 supplement
[not found] <20180612164620.797338191@linuxfoundation.org>
@ 2018-06-12 16:46 ` Greg Kroah-Hartman
0 siblings, 0 replies; only message in thread
From: Greg Kroah-Hartman @ 2018-06-12 16:46 UTC (permalink / raw)
To: linux-kernel
Cc: Greg Kroah-Hartman, stable, Ben Hutchings, Konrad Rzeszutek Wilk,
Thomas Gleixner, David Woodhouse, kvm
4.9-stable review patch. If anyone has any objections, please let me know.
------------------
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)
^ permalink raw reply [flat|nested] only message in thread