[PATCH v4 2/3] KVM: x86: Advertise AMD_IBPB_RET to userspace

Jim Mattson posted 3 patches 2 months, 2 weeks ago
There is a newer version of this series
[PATCH v4 2/3] KVM: x86: Advertise AMD_IBPB_RET to userspace
Posted by Jim Mattson 2 months, 2 weeks ago
This is an inherent feature of IA32_PRED_CMD[0], so it is trivially
virtualizable (as long as IA32_PRED_CMD[0] is virtualized).

Suggested-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Jim Mattson <jmattson@google.com>
---
 arch/x86/kvm/cpuid.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index 2617be544480..ec7b2ca3b4d3 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -751,7 +751,7 @@ void kvm_set_cpu_caps(void)
 		F(CLZERO) | F(XSAVEERPTR) |
 		F(WBNOINVD) | F(AMD_IBPB) | F(AMD_IBRS) | F(AMD_SSBD) | F(VIRT_SSBD) |
 		F(AMD_SSB_NO) | F(AMD_STIBP) | F(AMD_STIBP_ALWAYS_ON) |
-		F(AMD_PSFD)
+		F(AMD_PSFD) | F(AMD_IBPB_RET)
 	);
 
 	/*
-- 
2.46.0.662.g92d0881bb0-goog