Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755403Ab0D1D6i (ORCPT ); Tue, 27 Apr 2010 23:58:38 -0400 Received: from cn.fujitsu.com ([222.73.24.84]:60003 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1754792Ab0D1D6f (ORCPT ); Tue, 27 Apr 2010 23:58:35 -0400 Message-ID: <4BD7B1AD.3040700@cn.fujitsu.com> Date: Wed, 28 Apr 2010 11:55:25 +0800 From: Xiao Guangrong User-Agent: Thunderbird 2.0.0.24 (Windows/20100228) MIME-Version: 1.0 To: Avi Kivity CC: Marcelo Tosatti , KVM list , LKML Subject: [PATCH v3 5/10] KVM MMU: split kvm_sync_page() function References: <4BD7AE34.5000408@cn.fujitsu.com> In-Reply-To: <4BD7AE34.5000408@cn.fujitsu.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2258 Lines: 73 Split kvm_sync_page() into kvm_sync_page() and kvm_sync_page_transient() to clarify the code address Avi's suggestion kvm_sync_page_transient() function only update shadow page but not mark it sync and not write protect sp->gfn. it will be used by later patch Signed-off-by: Xiao Guangrong --- arch/x86/kvm/mmu.c | 28 ++++++++++++++++++++++++---- 1 files changed, 24 insertions(+), 4 deletions(-) diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index e1ac325..ec283c3 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -1196,16 +1196,20 @@ static void kvm_unlink_unsync_page(struct kvm *kvm, struct kvm_mmu_page *sp) static int kvm_mmu_zap_page(struct kvm *kvm, struct kvm_mmu_page *sp); -static int kvm_sync_page(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp) +static int __kvm_sync_page(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp, + bool clear_unsync) { if (sp->role.cr4_pae != !!is_pae(vcpu)) { kvm_mmu_zap_page(vcpu->kvm, sp); return 1; } - if (rmap_write_protect(vcpu->kvm, sp->gfn)) - kvm_flush_remote_tlbs(vcpu->kvm); - kvm_unlink_unsync_page(vcpu->kvm, sp); + if (clear_unsync) { + if (rmap_write_protect(vcpu->kvm, sp->gfn)) + kvm_flush_remote_tlbs(vcpu->kvm); + kvm_unlink_unsync_page(vcpu->kvm, sp); + } + if (vcpu->arch.mmu.sync_page(vcpu, sp)) { kvm_mmu_zap_page(vcpu->kvm, sp); return 1; @@ -1215,6 +1219,22 @@ static int kvm_sync_page(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp) return 0; } +static void mmu_convert_notrap(struct kvm_mmu_page *sp); +static int kvm_sync_page_transient(struct kvm_vcpu *vcpu, + struct kvm_mmu_page *sp) +{ + int ret; + + ret = __kvm_sync_page(vcpu, sp, false); + mmu_convert_notrap(sp); + return ret; +} + +static int kvm_sync_page(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp) +{ + return __kvm_sync_page(vcpu, sp, true); +} + struct mmu_page_path { struct kvm_mmu_page *parent[PT64_ROOT_LEVEL-1]; unsigned int idx[PT64_ROOT_LEVEL-1]; -- 1.6.1.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/