From 65ca2872015c232d6743b497e3c08ff96596b917 Mon Sep 17 00:00:00 2001 From: Yosry Ahmed Date: Fri, 21 Feb 2025 16:33:51 +0000 Subject: [PATCH] KVM: x86: Propagate AMD's IbrsSameMode to the guest If IBRS provides same mode (kernel/user or host/guest) protection on the host, then by definition it also provides same mode protection in the guest. In fact, all different modes from the guest's perspective are the same mode from the host's perspective anyway. Propagate IbrsSameMode to the guests. Signed-off-by: Yosry Ahmed Reviewed-by: Jim Mattson Link: https://lore.kernel.org/r/20250221163352.3818347-3-yosry.ahmed@linux.dev Signed-off-by: Sean Christopherson --- arch/x86/kvm/cpuid.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index e92263fbbad68..f678cbda6ebf5 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -1093,6 +1093,7 @@ void kvm_set_cpu_caps(void) F(AMD_SSB_NO), F(AMD_STIBP), F(AMD_STIBP_ALWAYS_ON), + F(AMD_IBRS_SAME_MODE), F(AMD_PSFD), F(AMD_IBPB_RET), ); -- 2.47.2