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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 29 Aug 2022 10:09:47.6575 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 6c5740cb-54ae-409c-b95d-08da89a69aa7 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CO1PEPF00001A5F.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB2955 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org VNMI feature allows the hypervisor to inject NMI into the guest w/o using Event injection mechanism, The benefit of using VNMI over the event Injection that does not require tracking the Guest's NMI state and intercepting the IRET for the NMI completion. VNMI achieves that by exposing 3 capability bits in VMCB intr_cntrl which helps with virtualizing NMI injection and NMI_Masking. The presence of this feature is indicated via the CPUID function 0x8000000A_EDX[25]. Reviewed-by: Maxim Levitsky Signed-off-by: Santosh Shukla --- 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 ef4775c6db01..33e3603be09e 100644 --- a/arch/x86/include/asm/cpufeatures.h +++ b/arch/x86/include/asm/cpufeatures.h @@ -356,6 +356,7 @@ #define X86_FEATURE_VGIF (15*32+16) /* Virtual GIF */ #define X86_FEATURE_X2AVIC (15*32+18) /* Virtual x2apic */ #define X86_FEATURE_V_SPEC_CTRL (15*32+20) /* Virtual SPEC_CTRL */ +#define X86_FEATURE_V_NMI (15*32+25) /* Virtual NMI */ #define X86_FEATURE_SVME_ADDR_CHK (15*32+28) /* "" SVME addr check */ /* Intel-defined CPU features, CPUID level 0x00000007:0 (ECX), word 16 */ -- 2.25.1