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From: Paolo Bonzini <pbonzini@redhat.com>
To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: seanjc@google.com
Subject: [PATCH 12/22] KVM: x86/mmu: cleanup computation of MMU roles for shadow paging
Date: Thu, 14 Apr 2022 03:39:50 -0400	[thread overview]
Message-ID: <20220414074000.31438-13-pbonzini@redhat.com> (raw)
In-Reply-To: <20220414074000.31438-1-pbonzini@redhat.com>

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 --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);
-- 
2.31.1



  parent reply	other threads:[~2022-04-14  7:42 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-14  7:39 [PATCH v3 00/22] https://www.spinics.net/lists/kvm/msg267878.html Paolo Bonzini
2022-04-14  7:39 ` [PATCH 01/22] KVM: x86/mmu: nested EPT cannot be used in SMM Paolo Bonzini
2022-04-14  7:39 ` [PATCH 02/22] KVM: x86/mmu: constify uses of struct kvm_mmu_role_regs Paolo Bonzini
2022-04-14  7:39 ` [PATCH 03/22] KVM: x86/mmu: pull computation of kvm_mmu_role_regs to kvm_init_mmu Paolo Bonzini
2022-04-14  7:39 ` [PATCH 04/22] KVM: x86/mmu: rephrase unclear comment Paolo Bonzini
2022-04-14  7:39 ` [PATCH 05/22] KVM: x86: Clean up and document nested #PF workaround Paolo Bonzini
2022-04-14  7:39 ` [PATCH 06/22] KVM: x86/mmu: remove "bool base_only" arguments Paolo Bonzini
2022-04-14  7:39 ` [PATCH 07/22] KVM: x86/mmu: split cpu_role from mmu_role Paolo Bonzini
2022-04-15  4:16   ` Like Xu
2022-04-14  7:39 ` [PATCH 08/22] KVM: x86/mmu: do not recompute root level from kvm_mmu_role_regs Paolo Bonzini
2022-04-14  7:39 ` [PATCH 09/22] KVM: x86/mmu: remove ept_ad field Paolo Bonzini
2022-04-14  7:39 ` [PATCH 10/22] KVM: x86/mmu: remove kvm_calc_shadow_root_page_role_common Paolo Bonzini
2022-04-14  7:39 ` [PATCH 11/22] KVM: x86/mmu: cleanup computation of MMU roles for two-dimensional paging Paolo Bonzini
2022-04-14  7:39 ` Paolo Bonzini [this message]
2022-04-14  7:39 ` [PATCH 13/22] KVM: x86/mmu: store shadow EFER.NX in the MMU role Paolo Bonzini
2022-04-14  7:39 ` [PATCH 14/22] KVM: x86/mmu: remove extended bits from mmu_role, rename field Paolo Bonzini
2022-04-14  7:39 ` [PATCH 15/22] KVM: x86/mmu: rename kvm_mmu_role union Paolo Bonzini
2022-04-14  7:39 ` [PATCH 16/22] KVM: x86/mmu: remove redundant bits from extended role Paolo Bonzini
2022-04-14  8:27   ` Paolo Bonzini
2022-05-10  0:20   ` Sean Christopherson
2022-05-11 13:53     ` Paolo Bonzini
2022-05-12 13:59     ` Paolo Bonzini
2022-05-12 14:18       ` Sean Christopherson
2022-05-12 16:09         ` Paolo Bonzini
2022-05-12 21:34           ` Sean Christopherson
2022-04-14  7:39 ` [PATCH 17/22] KVM: x86/mmu: remove valid " Paolo Bonzini
2022-04-14  7:39 ` [PATCH 18/22] KVM: x86/mmu: simplify and/or inline computation of shadow MMU roles Paolo Bonzini
2022-04-14  7:39 ` [PATCH 19/22] KVM: x86/mmu: pull CPU mode computation to kvm_init_mmu Paolo Bonzini
2022-04-14  7:39 ` [PATCH 20/22] KVM: x86/mmu: replace shadow_root_level with root_role.level Paolo Bonzini
2022-04-14  7:39 ` [PATCH 21/22] KVM: x86/mmu: replace root_level with cpu_role.base.level Paolo Bonzini
2022-04-14  7:40 ` [PATCH 22/22] KVM: x86/mmu: replace direct_map with root_role.direct Paolo Bonzini
2022-04-14  7:47 ` [PATCH v3 00/22] https://www.spinics.net/lists/kvm/msg267878.html Paolo Bonzini
2022-04-14 15:02   ` Sean Christopherson
2022-04-14 15:09     ` Paolo Bonzini

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