KVM: x86/mmu: Rename kvm_mmu->get_cr3() to ->get_guest_pgd()

Rename kvm_mmu->get_cr3() to call out that it is retrieving a guest
value, as opposed to kvm_mmu->set_cr3(), which sets a host value, and to
note that it will return something other than CR3 when nested EPT is in
use.  Hopefully the new name will also make it more obvious that L1's
nested_cr3 is returned in SVM's nested NPT case.

No functional change intended.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

6 files changed, 10 insertions, 10 deletions

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 327cfce91185..316ec6cf532b 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -385,7 +385,7 @@ struct kvm_mmu_root_info {
  */
 struct kvm_mmu {
 	void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long root);
-	unsigned long (*get_cr3)(struct kvm_vcpu *vcpu);
+	unsigned long (*get_guest_pgd)(struct kvm_vcpu *vcpu);
 	u64 (*get_pdptr)(struct kvm_vcpu *vcpu, int index);
 	int (*page_fault)(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa, u32 err,
 			  bool prefault);
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index a214e103af07..a1f4e325420e 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -3733,7 +3733,7 @@ static int mmu_alloc_shadow_roots(struct kvm_vcpu *vcpu)
 	gfn_t root_gfn, root_cr3;
 	int i;
 
-	root_cr3 = vcpu->arch.mmu->get_cr3(vcpu);
+	root_cr3 = vcpu->arch.mmu->get_guest_pgd(vcpu);
 	root_gfn = root_cr3 >> PAGE_SHIFT;
 
 	if (mmu_check_root(vcpu, root_gfn))
@@ -4070,7 +4070,7 @@ static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa,
 	arch.token = (vcpu->arch.apf.id++ << 12) | vcpu->vcpu_id;
 	arch.gfn = gfn;
 	arch.direct_map = vcpu->arch.mmu->direct_map;
-	arch.cr3 = vcpu->arch.mmu->get_cr3(vcpu);
+	arch.cr3 = vcpu->arch.mmu->get_guest_pgd(vcpu);
 
 	return kvm_setup_async_pf(vcpu, cr2_or_gpa,
 				  kvm_vcpu_gfn_to_hva(vcpu, gfn), &arch);
@@ -4929,7 +4929,7 @@ static void init_kvm_tdp_mmu(struct kvm_vcpu *vcpu)
 	context->shadow_root_level = kvm_x86_ops->get_tdp_level(vcpu);
 	context->direct_map = true;
 	context->set_cr3 = kvm_x86_ops->set_tdp_cr3;
-	context->get_cr3 = get_cr3;
+	context->get_guest_pgd = get_cr3;
 	context->get_pdptr = kvm_pdptr_read;
 	context->inject_page_fault = kvm_inject_page_fault;
 
@@ -5076,7 +5076,7 @@ static void init_kvm_softmmu(struct kvm_vcpu *vcpu)
 
 	kvm_init_shadow_mmu(vcpu);
 	context->set_cr3           = kvm_x86_ops->set_cr3;
-	context->get_cr3           = get_cr3;
+	context->get_guest_pgd     = get_cr3;
 	context->get_pdptr         = kvm_pdptr_read;
 	context->inject_page_fault = kvm_inject_page_fault;
 }
@@ -5090,7 +5090,7 @@ static void init_kvm_nested_mmu(struct kvm_vcpu *vcpu)
 		return;
 
 	g_context->mmu_role.as_u64 = new_role.as_u64;
-	g_context->get_cr3           = get_cr3;
+	g_context->get_guest_pgd     = get_cr3;
 	g_context->get_pdptr         = kvm_pdptr_read;
 	g_context->inject_page_fault = kvm_inject_page_fault;
 
diff --git a/arch/x86/kvm/mmu/paging_tmpl.h b/arch/x86/kvm/mmu/paging_tmpl.h
index 6b15b58f3ecc..1ddbfff64ccc 100644
--- a/arch/x86/kvm/mmu/paging_tmpl.h
+++ b/arch/x86/kvm/mmu/paging_tmpl.h
@@ -333,7 +333,7 @@ static int FNAME(walk_addr_generic)(struct guest_walker *walker,
 	trace_kvm_mmu_pagetable_walk(addr, access);
 retry_walk:
 	walker->level = mmu->root_level;
-	pte           = mmu->get_cr3(vcpu);
+	pte           = mmu->get_guest_pgd(vcpu);
 	have_ad       = PT_HAVE_ACCESSED_DIRTY(mmu);
 
 #if PTTYPE == 64
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 0d417276653b..48c9390011d0 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -3012,7 +3012,7 @@ static void nested_svm_init_mmu_context(struct kvm_vcpu *vcpu)
 	vcpu->arch.mmu = &vcpu->arch.guest_mmu;
 	kvm_init_shadow_mmu(vcpu);
 	vcpu->arch.mmu->set_cr3           = nested_svm_set_tdp_cr3;
-	vcpu->arch.mmu->get_cr3           = nested_svm_get_tdp_cr3;
+	vcpu->arch.mmu->get_guest_pgd     = nested_svm_get_tdp_cr3;
 	vcpu->arch.mmu->get_pdptr         = nested_svm_get_tdp_pdptr;
 	vcpu->arch.mmu->inject_page_fault = nested_svm_inject_npf_exit;
 	vcpu->arch.mmu->shadow_root_level = get_npt_level(vcpu);
diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index c1eae446d5da..b6719d7f4a34 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -355,7 +355,7 @@ static void nested_ept_init_mmu_context(struct kvm_vcpu *vcpu)
 			nested_ept_ad_enabled(vcpu),
 			nested_ept_get_eptp(vcpu));
 	vcpu->arch.mmu->set_cr3           = vmx_set_cr3;
-	vcpu->arch.mmu->get_cr3           = nested_ept_get_eptp;
+	vcpu->arch.mmu->get_guest_pgd     = nested_ept_get_eptp;
 	vcpu->arch.mmu->inject_page_fault = nested_ept_inject_page_fault;
 	vcpu->arch.mmu->get_pdptr         = kvm_pdptr_read;
 
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index b15092c9593d..ba4d476b79ad 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -10165,7 +10165,7 @@ void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, struct kvm_async_pf *work)
 		return;
 
 	if (!vcpu->arch.mmu->direct_map &&
-	      work->arch.cr3 != vcpu->arch.mmu->get_cr3(vcpu))
+	      work->arch.cr3 != vcpu->arch.mmu->get_guest_pgd(vcpu))
 		return;
 
 	kvm_mmu_do_page_fault(vcpu, work->cr2_or_gpa, 0, true);