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| author | Lai Jiangshan <laijs@linux.alibaba.com> | 2021-11-08 20:43:55 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-12-08 04:24:59 -0500 |
| commit | 40e49c4f5fb0699b4b5b5b1ee0a1bc88b4fec00d (patch) | |
| tree | ee3b25ad6be5ffa7f97bcd493f671c7b13011c47 /arch/x86/kvm/svm | |
| parent | c0d6956e43054e397f4f661d0a62d490278ddef9 (diff) | |
| download | linux-40e49c4f5fb0699b4b5b5b1ee0a1bc88b4fec00d.tar.gz | |
KVM: SVM: Track dirtiness of PDPTRs even if NPT is disabled
Use the same logic to handle the availability of VCPU_EXREG_PDPTR as VMX, also removing a branch in svm_vcpu_run(). Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com> Message-Id: <20211108124407.12187-4-jiangshanlai@gmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/svm')
| -rw-r--r-- | arch/x86/kvm/svm/svm.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c index 64a10cdb2356..9b6386282198 100644 --- a/arch/x86/kvm/svm/svm.c +++ b/arch/x86/kvm/svm/svm.c @@ -1598,10 +1598,16 @@ static void svm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) static void svm_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg) { + kvm_register_mark_available(vcpu, reg); + switch (reg) { case VCPU_EXREG_PDPTR: - BUG_ON(!npt_enabled); - load_pdptrs(vcpu, vcpu->arch.walk_mmu, kvm_read_cr3(vcpu)); + /* + * When !npt_enabled, mmu->pdptrs[] is already available since + * it is always updated per SDM when moving to CRs. + */ + if (npt_enabled) + load_pdptrs(vcpu, vcpu->arch.walk_mmu, kvm_read_cr3(vcpu)); break; default: KVM_BUG_ON(1, vcpu->kvm); @@ -3974,8 +3980,7 @@ static __no_kcsan fastpath_t svm_vcpu_run(struct kvm_vcpu *vcpu) vcpu->arch.apf.host_apf_flags = kvm_read_and_reset_apf_flags(); - if (npt_enabled) - kvm_register_clear_available(vcpu, VCPU_EXREG_PDPTR); + kvm_register_clear_available(vcpu, VCPU_EXREG_PDPTR); /* * We need to handle MC intercepts here before the vcpu has a chance to |