Commit c9470a2e authored by Junaid Shahid's avatar Junaid Shahid Committed by Paolo Bonzini
Browse files

kvm: x86: Propagate guest PCIDs to host PCIDs 



When using shadow paging mode, propagate the guest's PCID value to
the shadow CR3 in the host instead of always using PCID 0.

Signed-off-by: default avatarJunaid Shahid <junaids@google.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent afe828d1

arch/x86/kvm/mmu.h

+16 −1
Original line number Diff line number Diff line
@@ -86,10 +86,25 @@ static inline int kvm_mmu_reload(struct kvm_vcpu *vcpu) 
	return kvm_mmu_load(vcpu);

}



static inline unsigned long kvm_get_pcid(struct kvm_vcpu *vcpu, gpa_t cr3)

{

	BUILD_BUG_ON((X86_CR3_PCID_MASK & PAGE_MASK) != 0);



	return kvm_read_cr4_bits(vcpu, X86_CR4_PCIDE)

	       ? cr3 & X86_CR3_PCID_MASK

	       : 0;

}



static inline unsigned long kvm_get_active_pcid(struct kvm_vcpu *vcpu)

{

	return kvm_get_pcid(vcpu, kvm_read_cr3(vcpu));

}



static inline void kvm_mmu_load_cr3(struct kvm_vcpu *vcpu)

{

	if (VALID_PAGE(vcpu->arch.mmu.root_hpa))

		vcpu->arch.mmu.set_cr3(vcpu, vcpu->arch.mmu.root_hpa);

		vcpu->arch.mmu.set_cr3(vcpu, vcpu->arch.mmu.root_hpa |

					     kvm_get_active_pcid(vcpu));

}



/*