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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


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

On 23/09/20 18:33, Sean Christopherson wrote:
> 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;
>  
> 

Queued, thanks.

Paolo


^ permalink raw reply	[flat|nested] 2+ messages in thread
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