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KVM: x86/mmu: nested EPT cannot be used in SMM

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The role.base.smm flag is always zero when setting up shadow EPT,
do not bother copying it over from vcpu->arch.root_mmu.

Reviewed-by: David Matlack <dmatlack@google.com>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2022-02-10 07:30:08 -05:00
parent 8b9e74bfbf
commit daed87b876
1 changed files with 5 additions and 3 deletions
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8
arch/x86/kvm/mmu/mmu.c
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@ -4953,9 +4953,11 @@ kvm_calc_shadow_ept_root_page_role(struct kvm_vcpu *vcpu, bool accessed_dirty,
{
union kvm_mmu_role role = {0};
/* SMM flag is inherited from root_mmu */
role.base.smm = vcpu->arch.root_mmu.mmu_role.base.smm;
/*
* KVM does not support SMM transfer monitors, and consequently does not
* support the "entry to SMM" control either. role.base.smm is always 0.
*/
WARN_ON_ONCE(is_smm(vcpu));
role.base.level = level;
role.base.has_4_byte_gpte = false;
role.base.direct = false;