Commit daed87b8 authored by Paolo Bonzini's avatar Paolo Bonzini
Browse files

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



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: default avatarDavid Matlack <dmatlack@google.com>
Reviewed-by: default avatarSean Christopherson <seanjc@google.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 8b9e74bf

arch/x86/kvm/mmu/mmu.c

+5 −3
Original line number Diff line number Diff line
@@ -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;