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KVM: x86/mmu: use tdp_mmu_free_sp to free roots

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Minor cleanup to deduplicate the code used to free a struct kvm_mmu_page
in the TDP MMU.

No functional change intended.

Signed-off-by: Ben Gardon <bgardon@google.com>
Message-Id: <20210401233736.638171-4-bgardon@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Ben Gardon 2021-04-01 16:37:26 -07:00 committed by Paolo Bonzini
parent 76eb54e7e7
commit 4bba36d72b
1 changed files with 7 additions and 8 deletions
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15
arch/x86/kvm/mmu/tdp_mmu.c
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@ -92,6 +92,12 @@ static inline struct kvm_mmu_page *tdp_mmu_next_root(struct kvm *kvm,
static bool zap_gfn_range(struct kvm *kvm, struct kvm_mmu_page *root,
gfn_t start, gfn_t end, bool can_yield, bool flush);
static void tdp_mmu_free_sp(struct kvm_mmu_page *sp)
{
free_page((unsigned long)sp->spt);
kmem_cache_free(mmu_page_header_cache, sp);
}
void kvm_tdp_mmu_free_root(struct kvm *kvm, struct kvm_mmu_page *root)
{
gfn_t max_gfn = 1ULL << (shadow_phys_bits - PAGE_SHIFT);
@ -105,8 +111,7 @@ void kvm_tdp_mmu_free_root(struct kvm *kvm, struct kvm_mmu_page *root)
zap_gfn_range(kvm, root, 0, max_gfn, false, false);
free_page((unsigned long)root->spt);
kmem_cache_free(mmu_page_header_cache, root);
tdp_mmu_free_sp(root);
}
static union kvm_mmu_page_role page_role_for_level(struct kvm_vcpu *vcpu,
@ -168,12 +173,6 @@ out:
return __pa(root->spt);
}
static void tdp_mmu_free_sp(struct kvm_mmu_page *sp)
{
free_page((unsigned long)sp->spt);
kmem_cache_free(mmu_page_header_cache, sp);
}
/*
* This is called through call_rcu in order to free TDP page table memory
* safely with respect to other kernel threads that may be operating on