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KVM: nVMX: expose VMX capabilities for nested hypervisors to userspace

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Use the new MSR feature framework to tell userspace which VMX capabilities
are available for nested hypervisors.  Before, these were only accessible
with the KVM_GET_MSR VCPU ioctl, after VCPUs had been created.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
This commit is contained in:
Paolo Bonzini
2018-02-26 13:40:09 +01:00
committed by Radim Krčmář
parent 6677f3dad8
commit 1389309c81
2 changed files with 40 additions and 5 deletions
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19
arch/x86/kvm/x86.c
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@@ -1056,6 +1056,25 @@ static unsigned num_emulated_msrs;
* can be used by a hypervisor to validate requested CPU features.
*/
static u32 msr_based_features[] = {
MSR_IA32_VMX_BASIC,
MSR_IA32_VMX_TRUE_PINBASED_CTLS,
MSR_IA32_VMX_PINBASED_CTLS,
MSR_IA32_VMX_TRUE_PROCBASED_CTLS,
MSR_IA32_VMX_PROCBASED_CTLS,
MSR_IA32_VMX_TRUE_EXIT_CTLS,
MSR_IA32_VMX_EXIT_CTLS,
MSR_IA32_VMX_TRUE_ENTRY_CTLS,
MSR_IA32_VMX_ENTRY_CTLS,
MSR_IA32_VMX_MISC,
MSR_IA32_VMX_CR0_FIXED0,
MSR_IA32_VMX_CR0_FIXED1,
MSR_IA32_VMX_CR4_FIXED0,
MSR_IA32_VMX_CR4_FIXED1,
MSR_IA32_VMX_VMCS_ENUM,
MSR_IA32_VMX_PROCBASED_CTLS2,
MSR_IA32_VMX_EPT_VPID_CAP,
MSR_IA32_VMX_VMFUNC,
MSR_F10H_DECFG,
MSR_IA32_UCODE_REV,
};