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KVM: x86: remove nested_mmu from mmu_is_nested()

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nested_mmu is always stored into vcpu->arch.walk_mmu at the same time as
guest_mmu is stored into vcpu->arch.mmu.  But nested_mmu is not even
a proper MMU, it is only used for page walking; plus the fact that
walk_mmu has to be switched at all is just an implementation detail.

In the end what matters here is whether the guest is using nested
page tables; vmx/nested.c and svm/nested.c check it to see if they
are in nEPT or nNPT context respectively.  So switch to checking
root_mmu vs. guest_mmu, which is a more cogent test.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-ID: <20260511150648.685374-2-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-ID: <20260530165545.25599-2-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2026-05-30 12:55:41 -04:00
parent 9fb628b4cd
commit 8503953e26
1 changed files with 1 additions and 1 deletions
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2
arch/x86/kvm/x86.h
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@ -290,7 +290,7 @@ static inline bool x86_exception_has_error_code(unsigned int vector)
static inline bool mmu_is_nested(struct kvm_vcpu *vcpu)
{
return vcpu->arch.walk_mmu == &vcpu->arch.nested_mmu;
return vcpu->arch.mmu == &vcpu->arch.guest_mmu;
}
static inline bool is_pae(struct kvm_vcpu *vcpu)