From 32c258aad47ef9c58c8ae50e160b9c94c43f3829 Mon Sep 17 00:00:00 2001 From: "Borislav Petkov (AMD)" Date: Thu, 16 Oct 2025 00:46:27 -0700 Subject: [PATCH] KVM: x86: Advertise SRSO_USER_KERNEL_NO to userspace [ Upstream commit 716f86b523d8ec3c17015ee0b03135c7aa6f2f08 ] SRSO_USER_KERNEL_NO denotes whether the CPU is affected by SRSO across user/kernel boundaries. Advertise it to guest userspace. Signed-off-by: Borislav Petkov (AMD) Reviewed-by: Nikolay Borisov Link: https://lore.kernel.org/r/20241202120416.6054-3-bp@kernel.org Signed-off-by: Harshit Mogalapalli Signed-off-by: Greg Kroah-Hartman --- 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 8f587c5bb6bc4..a7a1486ce2704 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -816,7 +816,7 @@ void kvm_set_cpu_caps(void) F(NO_NESTED_DATA_BP) | F(LFENCE_RDTSC) | 0 /* SmmPgCfgLock */ | F(VERW_CLEAR) | F(NULL_SEL_CLR_BASE) | F(AUTOIBRS) | 0 /* PrefetchCtlMsr */ | - F(WRMSR_XX_BASE_NS) + F(WRMSR_XX_BASE_NS) | F(SRSO_USER_KERNEL_NO) ); kvm_cpu_cap_check_and_set(X86_FEATURE_SBPB); -- 2.47.3