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Commit f43addd4 authored by Joerg Roedel's avatar Joerg Roedel Committed by Avi Kivity
Browse files

KVM: MMU: Make set_cr3 a function pointer in kvm_mmu 



This is necessary to implement Nested Nested Paging. As a
side effect this allows some cleanups in the SVM nested
paging code.

Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
parent c5a78f2b

arch/x86/include/asm/kvm_host.h

+1 −0
Original line number Diff line number Diff line
@@ -236,6 +236,7 @@ struct kvm_pio_request { 
 */

struct kvm_mmu {

	void (*new_cr3)(struct kvm_vcpu *vcpu);

	void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long root);

	int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);

	void (*free)(struct kvm_vcpu *vcpu);

	gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva, u32 access,

arch/x86/kvm/mmu.c

+4 −2
Original line number Diff line number Diff line
@@ -2714,6 +2714,7 @@ static int init_kvm_tdp_mmu(struct kvm_vcpu *vcpu) 
	context->shadow_root_level = kvm_x86_ops->get_tdp_level();

	context->root_hpa = INVALID_PAGE;

	context->direct_map = true;

	context->set_cr3 = kvm_x86_ops->set_cr3;



	if (!is_paging(vcpu)) {

		context->gva_to_gpa = nonpaging_gva_to_gpa;
@@ -2753,6 +2754,7 @@ static int init_kvm_softmmu(struct kvm_vcpu *vcpu) 


	vcpu->arch.mmu.base_role.cr4_pae = !!is_pae(vcpu);

	vcpu->arch.mmu.base_role.cr0_wp  = is_write_protection(vcpu);

	vcpu->arch.mmu.set_cr3           = kvm_x86_ops->set_cr3;



	return r;

}
@@ -2796,7 +2798,7 @@ int kvm_mmu_load(struct kvm_vcpu *vcpu) 
	if (r)

		goto out;

	/* set_cr3() should ensure TLB has been flushed */

	kvm_x86_ops->set_cr3(vcpu, vcpu->arch.mmu.root_hpa);

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

out:

	return r;

}