[PATCH v2 03/13] KVM: x86/mmu: use tdp_mmu_free_sp to free roots

Ben Gardon
2021-04-01T23:38:08Z

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>
---
arch/x86/kvm/mmu/tdp_mmu.c | 15 +++++++--------
1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/arch/x86/kvm/mmu/tdp_mmu.c b/arch/x86/kvm/mmu/tdp_mmu.c
index 6f612ac755a0..320cc4454737 100644
--- a/arch/x86/kvm/mmu/tdp_mmu.c
+++ b/arch/x86/kvm/mmu/tdp_mmu.c
@@ -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 @@ hpa_t kvm_tdp_mmu_get_vcpu_root_hpa(struct kvm_vcpu *vcpu)
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
--
2.31.0.208.g409f899ff0-goog