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* [PATCH] KVM: x86/mmu: Move individual kvm_mmu initialization into common helper
@ 2020-09-23 16:33 Sean Christopherson
  2020-09-23 17:02 ` Paolo Bonzini
  0 siblings, 1 reply; 2+ messages in thread
From: Sean Christopherson @ 2020-09-23 16:33 UTC (permalink / raw)
  To: Paolo Bonzini
  Cc: Sean Christopherson, Vitaly Kuznetsov, Wanpeng Li, Jim Mattson,
	Joerg Roedel, kvm, linux-kernel

Move initialization of 'struct kvm_mmu' fields into alloc_mmu_pages() to
consolidate code, and rename the helper to __kvm_mmu_create().

No functional change intended.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
 arch/x86/kvm/mmu/mmu.c | 25 +++++++++----------------
 1 file changed, 9 insertions(+), 16 deletions(-)

diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index 76c5826e29a2..a2c4c71ce5f2 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -5682,11 +5682,17 @@ static void free_mmu_pages(struct kvm_mmu *mmu)
 	free_page((unsigned long)mmu->lm_root);
 }
 
-static int alloc_mmu_pages(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu)
+static int __kvm_mmu_create(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu)
 {
 	struct page *page;
 	int i;
 
+	mmu->root_hpa = INVALID_PAGE;
+	mmu->root_pgd = 0;
+	mmu->translate_gpa = translate_gpa;
+	for (i = 0; i < KVM_MMU_NUM_PREV_ROOTS; i++)
+		mmu->prev_roots[i] = KVM_MMU_ROOT_INFO_INVALID;
+
 	/*
 	 * When using PAE paging, the four PDPTEs are treated as 'root' pages,
 	 * while the PDP table is a per-vCPU construct that's allocated at MMU
@@ -5712,7 +5718,6 @@ static int alloc_mmu_pages(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu)
 
 int kvm_mmu_create(struct kvm_vcpu *vcpu)
 {
-	uint i;
 	int ret;
 
 	vcpu->arch.mmu_pte_list_desc_cache.kmem_cache = pte_list_desc_cache;
@@ -5726,25 +5731,13 @@ int kvm_mmu_create(struct kvm_vcpu *vcpu)
 	vcpu->arch.mmu = &vcpu->arch.root_mmu;
 	vcpu->arch.walk_mmu = &vcpu->arch.root_mmu;
 
-	vcpu->arch.root_mmu.root_hpa = INVALID_PAGE;
-	vcpu->arch.root_mmu.root_pgd = 0;
-	vcpu->arch.root_mmu.translate_gpa = translate_gpa;
-	for (i = 0; i < KVM_MMU_NUM_PREV_ROOTS; i++)
-		vcpu->arch.root_mmu.prev_roots[i] = KVM_MMU_ROOT_INFO_INVALID;
-
-	vcpu->arch.guest_mmu.root_hpa = INVALID_PAGE;
-	vcpu->arch.guest_mmu.root_pgd = 0;
-	vcpu->arch.guest_mmu.translate_gpa = translate_gpa;
-	for (i = 0; i < KVM_MMU_NUM_PREV_ROOTS; i++)
-		vcpu->arch.guest_mmu.prev_roots[i] = KVM_MMU_ROOT_INFO_INVALID;
-
 	vcpu->arch.nested_mmu.translate_gpa = translate_nested_gpa;
 
-	ret = alloc_mmu_pages(vcpu, &vcpu->arch.guest_mmu);
+	ret = __kvm_mmu_create(vcpu, &vcpu->arch.guest_mmu);
 	if (ret)
 		return ret;
 
-	ret = alloc_mmu_pages(vcpu, &vcpu->arch.root_mmu);
+	ret = __kvm_mmu_create(vcpu, &vcpu->arch.root_mmu);
 	if (ret)
 		goto fail_allocate_root;
 
-- 
2.28.0


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2020-09-23 16:33 [PATCH] KVM: x86/mmu: Move individual kvm_mmu initialization into common helper Sean Christopherson
2020-09-23 17:02 ` Paolo Bonzini

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