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| author | Lai Jiangshan <laijs@linux.alibaba.com> | 2021-11-08 15:44:02 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-12-08 12:25:02 +0300 |
| commit | 3883bc9d28ed348d419d2e405d11f0924783f721 (patch) | |
| tree | 4e0a33f5253d8d2888131cf012d4b328cf3497c4 /arch/x86/kvm/vmx/nested.c | |
| parent | aec9c2402f74b898ad637a97360bfc001fb711e6 (diff) | |
| download | linux-3883bc9d28ed348d419d2e405d11f0924783f721.tar.xz | |
KVM: X86: Mark CR3 dirty when vcpu->arch.cr3 is changed
When vcpu->arch.cr3 is changed, it should be marked dirty unless it
is being updated to the value of the architecture guest CR3 (i.e.
VMX.GUEST_CR3 or vmcb->save.cr3 when tdp is enabled).
This patch has no functionality changed because
kvm_register_mark_dirty(vcpu, VCPU_EXREG_CR3) is superset of
kvm_register_mark_available(vcpu, VCPU_EXREG_CR3) with additional
change to vcpu->arch.regs_dirty, but no code uses regs_dirty for
VCPU_EXREG_CR3. (vmx_load_mmu_pgd() uses vcpu->arch.regs_avail instead
to test if VCPU_EXREG_CR3 dirty which means current code (ab)uses
regs_avail for VCPU_EXREG_CR3 dirty information.)
Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com>
Message-Id: <20211108124407.12187-11-jiangshanlai@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/vmx/nested.c')
| -rw-r--r-- | arch/x86/kvm/vmx/nested.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c index e885f557fcbe..b240776151c6 100644 --- a/arch/x86/kvm/vmx/nested.c +++ b/arch/x86/kvm/vmx/nested.c @@ -1104,7 +1104,7 @@ static int nested_vmx_load_cr3(struct kvm_vcpu *vcpu, unsigned long cr3, kvm_mmu_new_pgd(vcpu, cr3); vcpu->arch.cr3 = cr3; - kvm_register_mark_available(vcpu, VCPU_EXREG_CR3); + kvm_register_mark_dirty(vcpu, VCPU_EXREG_CR3); /* Re-initialize the MMU, e.g. to pick up CR4 MMU role changes. */ kvm_init_mmu(vcpu); |