On Mon, Aug 29, 2022 at 3:09 AM Santosh Shukla <santosh.shukla@xxxxxxx> wrote: > > 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 <mlevitsk@xxxxxxxxxx> > Signed-off-by: Santosh Shukla <santosh.shukla@xxxxxxx> > --- > 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 */ Why is it "V_NMI," but "VGIF"? Reviewed-by: Jim Mattson <jmattson@xxxxxxxxxx>
