From 9202aee816c84d69179f94193c5dd321bb0e8530 Mon Sep 17 00:00:00 2001 From: Sean Christopherson Date: Fri, 15 Jul 2022 22:42:25 +0000 Subject: [PATCH] KVM: x86/mmu: Rename pte_list_{destroy,remove}() to show they zap SPTEs Rename pte_list_remove() and pte_list_destroy() to kvm_zap_one_rmap_spte() and kvm_zap_all_rmap_sptes() respectively to document that (a) they zap SPTEs and (b) to better document how they differ (remove vs. destroy does not exactly scream "one vs. all"). No functional change intended. Signed-off-by: Sean Christopherson Message-Id: <20220715224226.3749507-7-seanjc@google.com> Signed-off-by: Paolo Bonzini --- arch/x86/kvm/mmu/mmu.c | 17 +++++++++-------- 1 file changed, 9 insertions(+), 8 deletions(-) diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index 00be88e0a5f7..282e7e2ab446 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -957,15 +957,16 @@ static void __pte_list_remove(u64 *spte, struct kvm_rmap_head *rmap_head) } } -static void pte_list_remove(struct kvm *kvm, struct kvm_rmap_head *rmap_head, - u64 *sptep) +static void kvm_zap_one_rmap_spte(struct kvm *kvm, + struct kvm_rmap_head *rmap_head, u64 *sptep) { mmu_spte_clear_track_bits(kvm, sptep); __pte_list_remove(sptep, rmap_head); } -/* Return true if rmap existed, false otherwise */ -static bool pte_list_destroy(struct kvm *kvm, struct kvm_rmap_head *rmap_head) +/* Return true if at least one SPTE was zapped, false otherwise */ +static bool kvm_zap_all_rmap_sptes(struct kvm *kvm, + struct kvm_rmap_head *rmap_head) { struct pte_list_desc *desc, *next; int i; @@ -1386,7 +1387,7 @@ static bool kvm_vcpu_write_protect_gfn(struct kvm_vcpu *vcpu, u64 gfn) static bool __kvm_zap_rmap(struct kvm *kvm, struct kvm_rmap_head *rmap_head, const struct kvm_memory_slot *slot) { - return pte_list_destroy(kvm, rmap_head); + return kvm_zap_all_rmap_sptes(kvm, rmap_head); } static bool kvm_zap_rmap(struct kvm *kvm, struct kvm_rmap_head *rmap_head, @@ -1417,7 +1418,7 @@ restart: need_flush = true; if (pte_write(pte)) { - pte_list_remove(kvm, rmap_head, sptep); + kvm_zap_one_rmap_spte(kvm, rmap_head, sptep); goto restart; } else { new_spte = kvm_mmu_changed_pte_notifier_make_spte( @@ -1596,7 +1597,7 @@ static void __rmap_add(struct kvm *kvm, rmap_count = pte_list_add(cache, spte, rmap_head); if (rmap_count > RMAP_RECYCLE_THRESHOLD) { - pte_list_destroy(kvm, rmap_head); + kvm_zap_all_rmap_sptes(kvm, rmap_head); kvm_flush_remote_tlbs_with_address( kvm, sp->gfn, KVM_PAGES_PER_HPAGE(sp->role.level)); } @@ -6406,7 +6407,7 @@ restart: if (sp->role.direct && sp->role.level < kvm_mmu_max_mapping_level(kvm, slot, sp->gfn, pfn, PG_LEVEL_NUM)) { - pte_list_remove(kvm, rmap_head, sptep); + kvm_zap_one_rmap_spte(kvm, rmap_head, sptep); if (kvm_available_flush_tlb_with_range()) kvm_flush_remote_tlbs_with_address(kvm, sp->gfn, -- 2.20.1