imrcpan/erofs-linux
1
0 Fork 0
mirror of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git synced 2026-10-31 06:14:39 +01:00
Code Issues Packages Projects Releases Wiki Activity

x86/cpufeatures: Add the Virtual SPEC_CTRL feature

Browse Source 
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 <[email protected]>
Acked-by: Borislav Petkov <[email protected]>
Message-Id: <161188100272.28787.4097272856384825024.stgit@bmoger-ubuntu>
Signed-off-by: Paolo Bonzini <[email protected]>
This commit is contained in:
Babu Moger authored and Paolo Bonzini committed 2021-03-15 04:43:25 -04:00
1 parent cc3ed80ae6
commit f333374e10
1 file changed
+1
Download Patch File Download Diff File Expand all files Collapse all files
arch/x86/include/asm/cpufeatures.h
+1
View File
@@ -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 */