From: Hou Wenlong Date: Mon, 10 Oct 2022 12:19:14 +0000 (+0800) Subject: KVM: x86/mmu: Reduce gfn range of tlb flushing in tdp_mmu_map_handle_target_level() X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=1e203847aa9245bd782d6dc904ece124ca1b89cb;p=linux.git KVM: x86/mmu: Reduce gfn range of tlb flushing in tdp_mmu_map_handle_target_level() Since the children SP is zapped, the gfn range of tlb flushing should be the range covered by children SP not parent SP. Replace sp->gfn which is the base gfn of parent SP with iter->gfn and use the correct size of gfn range for children SP to reduce tlb flushing range. Fixes: bb95dfb9e2df ("KVM: x86/mmu: Defer TLB flush to caller when freeing TDP MMU shadow pages") Signed-off-by: Hou Wenlong Reviewed-by: David Matlack Link: https://lore.kernel.org/r/528ab9c784a486e9ce05f61462ad9260796a8732.1665214747.git.houwenlong.hwl@antgroup.com Signed-off-by: Sean Christopherson --- diff --git a/arch/x86/kvm/mmu/tdp_mmu.c b/arch/x86/kvm/mmu/tdp_mmu.c index bba33aea0fb00..ce2f86f8a3a5f 100644 --- a/arch/x86/kvm/mmu/tdp_mmu.c +++ b/arch/x86/kvm/mmu/tdp_mmu.c @@ -1080,8 +1080,7 @@ static int tdp_mmu_map_handle_target_level(struct kvm_vcpu *vcpu, return RET_PF_RETRY; else if (is_shadow_present_pte(iter->old_spte) && !is_last_spte(iter->old_spte, iter->level)) - kvm_flush_remote_tlbs_with_address(vcpu->kvm, sp->gfn, - KVM_PAGES_PER_HPAGE(iter->level + 1)); + kvm_flush_remote_tlbs_gfn(vcpu->kvm, iter->gfn, iter->level); /* * If the page fault was caused by a write but the page is write