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[12/22] KVM: x86/mmu: cleanup computation of MMU roles for shadow paging

Message ID 20220414074000.31438-13-pbonzini@redhat.com (mailing list archive)
State New, archived
Headers show
Series https://www.spinics.net/lists/kvm/msg267878.html | expand

Commit Message

Paolo Bonzini April 14, 2022, 7:39 a.m. UTC 
Pass the already-computed CPU role, instead of redoing it.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 arch/x86/kvm/mmu/mmu.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)
diff mbox series

Patch

diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index 6c0287d60781..92dade92462c 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -4803,15 +4803,14 @@  static void init_kvm_tdp_mmu(struct kvm_vcpu *vcpu,
 
 static union kvm_mmu_role
 kvm_calc_shadow_mmu_root_page_role(struct kvm_vcpu *vcpu,
-				   const struct kvm_mmu_role_regs *regs)
+				   union kvm_mmu_role cpu_role)
 {
-	union kvm_mmu_role cpu_role = kvm_calc_cpu_role(vcpu, regs);
 	union kvm_mmu_role role;
 
 	role = cpu_role;
-	if (!____is_efer_lma(regs))
+	if (!cpu_role.ext.efer_lma)
 		role.base.level = PT32E_ROOT_LEVEL;
-	else if (____is_cr4_la57(regs))
+	else if (cpu_role.ext.cr4_la57)
 		role.base.level = PT64_ROOT_5LEVEL;
 	else
 		role.base.level = PT64_ROOT_4LEVEL;
@@ -4850,16 +4849,15 @@  static void kvm_init_shadow_mmu(struct kvm_vcpu *vcpu,
 	struct kvm_mmu *context = &vcpu->arch.root_mmu;
 	union kvm_mmu_role cpu_role = kvm_calc_cpu_role(vcpu, regs);
 	union kvm_mmu_role mmu_role =
-		kvm_calc_shadow_mmu_root_page_role(vcpu, regs);
+		kvm_calc_shadow_mmu_root_page_role(vcpu, cpu_role);
 
 	shadow_mmu_init_context(vcpu, context, cpu_role, mmu_role);
 }
 
 static union kvm_mmu_role
 kvm_calc_shadow_npt_root_page_role(struct kvm_vcpu *vcpu,
-				   const struct kvm_mmu_role_regs *regs)
+				   union kvm_mmu_role cpu_role)
 {
-	union kvm_mmu_role cpu_role = kvm_calc_cpu_role(vcpu, regs);
 	union kvm_mmu_role role;
 
 	WARN_ON_ONCE(cpu_role.base.direct);
@@ -4879,7 +4877,7 @@  void kvm_init_shadow_npt_mmu(struct kvm_vcpu *vcpu, unsigned long cr0,
 		.efer = efer,
 	};
 	union kvm_mmu_role cpu_role = kvm_calc_cpu_role(vcpu, &regs);
-	union kvm_mmu_role mmu_role = kvm_calc_shadow_npt_root_page_role(vcpu, &regs);;
+	union kvm_mmu_role mmu_role = kvm_calc_shadow_npt_root_page_role(vcpu, cpu_role);
 
 	shadow_mmu_init_context(vcpu, context, cpu_role, mmu_role);
 	kvm_mmu_new_pgd(vcpu, nested_cr3);