From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: [PATCH 06/40] KVM: MMU: Simplify kvm_mmu_zap_page() Date: Tue, 23 Sep 2008 16:46:20 +0300 Message-ID: <1222177614-26669-7-git-send-email-avi@redhat.com> References: <1222177614-26669-1-git-send-email-avi@redhat.com> Cc: kvm@vger.kernel.org, Avi Kivity To: linux-kernel@vger.kernel.org Return-path: Received: from mx2.redhat.com ([66.187.237.31]:52354 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752466AbYIWNrL (ORCPT ); Tue, 23 Sep 2008 09:47:11 -0400 In-Reply-To: <1222177614-26669-1-git-send-email-avi@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: From: Avi Kivity The twisty maze of conditionals can be reduced. [joerg: fix tlb flushing] Signed-off-by: Joerg Roedel Signed-off-by: Avi Kivity --- arch/x86/kvm/mmu.c | 14 +++++--------- 1 files changed, 5 insertions(+), 9 deletions(-) diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 81016a3..c3afbfe 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -955,7 +955,6 @@ static void kvm_mmu_page_unlink_children(struct kvm *kvm, rmap_remove(kvm, &pt[i]); pt[i] = shadow_trap_nonpresent_pte; } - kvm_flush_remote_tlbs(kvm); return; } @@ -974,7 +973,6 @@ static void kvm_mmu_page_unlink_children(struct kvm *kvm, } pt[i] = shadow_trap_nonpresent_pte; } - kvm_flush_remote_tlbs(kvm); } static void kvm_mmu_put_page(struct kvm_mmu_page *sp, u64 *parent_pte) @@ -1016,18 +1014,16 @@ static void kvm_mmu_zap_page(struct kvm *kvm, struct kvm_mmu_page *sp) ++kvm->stat.mmu_shadow_zapped; kvm_mmu_page_unlink_children(kvm, sp); kvm_mmu_unlink_parents(kvm, sp); + kvm_flush_remote_tlbs(kvm); + if (!sp->role.invalid && !sp->role.metaphysical) + unaccount_shadowed(kvm, sp->gfn); if (!sp->root_count) { - if (!sp->role.metaphysical && !sp->role.invalid) - unaccount_shadowed(kvm, sp->gfn); hlist_del(&sp->hash_link); kvm_mmu_free_page(kvm, sp); } else { - int invalid = sp->role.invalid; - list_move(&sp->link, &kvm->arch.active_mmu_pages); sp->role.invalid = 1; + list_move(&sp->link, &kvm->arch.active_mmu_pages); kvm_reload_remote_mmus(kvm); - if (!sp->role.metaphysical && !invalid) - unaccount_shadowed(kvm, sp->gfn); } kvm_mmu_reset_last_pte_updated(kvm); } @@ -1842,7 +1838,7 @@ void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa, index = kvm_page_table_hashfn(gfn); bucket = &vcpu->kvm->arch.mmu_page_hash[index]; hlist_for_each_entry_safe(sp, node, n, bucket, hash_link) { - if (sp->gfn != gfn || sp->role.metaphysical) + if (sp->gfn != gfn || sp->role.metaphysical || sp->role.invalid) continue; pte_size = sp->role.glevels == PT32_ROOT_LEVEL ? 4 : 8; misaligned = (offset ^ (offset + bytes - 1)) & ~(pte_size - 1); -- 1.6.0.1