diff options
| author | Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> | 2022-05-19 13:26:55 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-06-24 19:44:54 +0300 |
| commit | 4bdec12aa8d6d0fd7f1ac6740c456bf726e53c0b (patch) | |
| tree | 575b704109e9b67a85d2251c58ee2b75527264fb /arch/x86/include/asm/svm.h | |
| parent | bf348f667ed36c0799dd6d10adb7be9cdfea48c3 (diff) | |
| download | linux-4bdec12aa8d6d0fd7f1ac6740c456bf726e53c0b.tar.xz | |
KVM: SVM: Detect X2APIC virtualization (x2AVIC) support
Add CPUID check for the x2APIC virtualization (x2AVIC) feature.
If available, the SVM driver can support both AVIC and x2AVIC modes
when load the kvm_amd driver with avic=1. The operating mode will be
determined at runtime depending on the guest APIC mode.
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Reviewed-by: Pankaj Gupta <pankaj.gupta@amd.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Message-Id: <20220519102709.24125-4-suravee.suthikulpanit@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/include/asm/svm.h')
| -rw-r--r-- | arch/x86/include/asm/svm.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/include/asm/svm.h b/arch/x86/include/asm/svm.h index 1b07fba11704..1d4d30cd84c2 100644 --- a/arch/x86/include/asm/svm.h +++ b/arch/x86/include/asm/svm.h @@ -195,6 +195,9 @@ struct __attribute__ ((__packed__)) vmcb_control_area { #define AVIC_ENABLE_SHIFT 31 #define AVIC_ENABLE_MASK (1 << AVIC_ENABLE_SHIFT) +#define X2APIC_MODE_SHIFT 30 +#define X2APIC_MODE_MASK (1 << X2APIC_MODE_SHIFT) + #define LBR_CTL_ENABLE_MASK BIT_ULL(0) #define VIRTUAL_VMLOAD_VMSAVE_ENABLE_MASK BIT_ULL(1) |