From f333374e108e7e4cd104591035c9e24ba050706d Mon Sep 17 00:00:00 2001 From: Babu Moger Date: Thu, 28 Jan 2021 18:43:22 -0600 Subject: [PATCH] x86/cpufeatures: Add the Virtual SPEC_CTRL feature Newer AMD processors have a feature to virtualize the use of the SPEC_CTRL MSR. Presence of this feature is indicated via CPUID function 0x8000000A_EDX[20]: GuestSpecCtrl. When present, the SPEC_CTRL MSR is automatically virtualized. Signed-off-by: Babu Moger Acked-by: Borislav Petkov Message-Id: <161188100272.28787.4097272856384825024.stgit@bmoger-ubuntu> Signed-off-by: Paolo Bonzini --- arch/x86/include/asm/cpufeatures.h | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h index cc96e26d69f7..12c4a13b22d8 100644 --- a/arch/x86/include/asm/cpufeatures.h +++ b/arch/x86/include/asm/cpufeatures.h @@ -336,6 +336,7 @@ #define X86_FEATURE_AVIC (15*32+13) /* Virtual Interrupt Controller */ #define X86_FEATURE_V_VMSAVE_VMLOAD (15*32+15) /* Virtual VMSAVE VMLOAD */ #define X86_FEATURE_VGIF (15*32+16) /* Virtual GIF */ +#define X86_FEATURE_V_SPEC_CTRL (15*32+20) /* Virtual SPEC_CTRL */ #define X86_FEATURE_SVME_ADDR_CHK (15*32+28) /* "" SVME addr check */ /* Intel-defined CPU features, CPUID level 0x00000007:0 (ECX), word 16 */ -- 2.11.0