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| author | Paolo Bonzini <pbonzini@redhat.com> | 2020-05-18 19:02:15 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-06-01 10:26:03 +0200 |
| commit | ca46d739e3caf44dcd3db9eb8da30d0ff3aa9180 (patch) | |
| tree | e6c9bd92b758d9da8cdbd944984444f0fbbddcea /arch/x86/kvm/svm | |
| parent | KVM: nSVM: remove HF_HIF_MASK (diff) | |
| download | linux-ca46d739e3caf44dcd3db9eb8da30d0ff3aa9180.tar.xz linux-ca46d739e3caf44dcd3db9eb8da30d0ff3aa9180.zip | |
KVM: nSVM: split nested_vmcb_check_controls
The authoritative state does not come from the VMCB once in guest mode,
but KVM_SET_NESTED_STATE can still perform checks on L1's provided SVM
controls because we get them from userspace.
Therefore, split out a function to do them.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/svm')
| -rw-r--r-- | arch/x86/kvm/svm/nested.c | 23 |
1 files changed, 14 insertions, 9 deletions
diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c index 65ecc8586f75..bd3a89cd4070 100644 --- a/arch/x86/kvm/svm/nested.c +++ b/arch/x86/kvm/svm/nested.c @@ -203,26 +203,31 @@ static bool nested_svm_vmrun_msrpm(struct vcpu_svm *svm) return true; } -static bool nested_vmcb_checks(struct vmcb *vmcb) +static bool nested_vmcb_check_controls(struct vmcb_control_area *control) { - if ((vmcb->save.efer & EFER_SVME) == 0) + if ((control->intercept & (1ULL << INTERCEPT_VMRUN)) == 0) return false; - if (((vmcb->save.cr0 & X86_CR0_CD) == 0) && - (vmcb->save.cr0 & X86_CR0_NW)) + if (control->asid == 0) return false; - if ((vmcb->control.intercept & (1ULL << INTERCEPT_VMRUN)) == 0) + if ((control->nested_ctl & SVM_NESTED_CTL_NP_ENABLE) && + !npt_enabled) return false; - if (vmcb->control.asid == 0) + return true; +} + +static bool nested_vmcb_checks(struct vmcb *vmcb) +{ + if ((vmcb->save.efer & EFER_SVME) == 0) return false; - if ((vmcb->control.nested_ctl & SVM_NESTED_CTL_NP_ENABLE) && - !npt_enabled) + if (((vmcb->save.cr0 & X86_CR0_CD) == 0) && + (vmcb->save.cr0 & X86_CR0_NW)) return false; - return true; + return nested_vmcb_check_controls(&vmcb->control); } static void load_nested_vmcb_control(struct vcpu_svm *svm, |