From patchwork Mon Nov 30 18:26:05 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiao Guangrong X-Patchwork-Id: 7729131 Return-Path: X-Original-To: patchwork-kvm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id DC20E9F1C0 for ; Mon, 30 Nov 2015 18:36:12 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 1D18620591 for ; Mon, 30 Nov 2015 18:36:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 451512058A for ; Mon, 30 Nov 2015 18:36:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754815AbbK3Sfw (ORCPT ); Mon, 30 Nov 2015 13:35:52 -0500 Received: from mga03.intel.com ([134.134.136.65]:23995 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754634AbbK3Scd (ORCPT ); Mon, 30 Nov 2015 13:32:33 -0500 Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga103.jf.intel.com with ESMTP; 30 Nov 2015 10:32:32 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.20,365,1444719600"; d="scan'208";a="610094001" Received: from xiaoreal1.sh.intel.com (HELO xiaoreal1.sh.intel.com.sh.intel.com) ([10.239.48.79]) by FMSMGA003.fm.intel.com with ESMTP; 30 Nov 2015 10:32:31 -0800 From: Xiao Guangrong To: pbonzini@redhat.com Cc: gleb@kernel.org, mtosatti@redhat.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Xiao Guangrong Subject: [PATCH 03/11] KVM: MMU: introduce kvm_mmu_slot_gfn_write_protect Date: Tue, 1 Dec 2015 02:26:05 +0800 Message-Id: <1448907973-36066-4-git-send-email-guangrong.xiao@linux.intel.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1448907973-36066-1-git-send-email-guangrong.xiao@linux.intel.com> References: <1448907973-36066-1-git-send-email-guangrong.xiao@linux.intel.com> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Split rmap_write_protect() and introduce the function to abstract the write protection based on the slot This function will be used in the later patch Signed-off-by: Xiao Guangrong --- arch/x86/kvm/mmu.c | 16 +++++++++++----- arch/x86/kvm/mmu.h | 2 ++ 2 files changed, 13 insertions(+), 5 deletions(-) diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 4b04d13..39809b8 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -1336,23 +1336,29 @@ void kvm_arch_mmu_enable_log_dirty_pt_masked(struct kvm *kvm, kvm_mmu_write_protect_pt_masked(kvm, slot, gfn_offset, mask); } -static bool rmap_write_protect(struct kvm_vcpu *vcpu, u64 gfn) +bool kvm_mmu_slot_gfn_write_protect(struct kvm *kvm, + struct kvm_memory_slot *slot, u64 gfn) { - struct kvm_memory_slot *slot; struct kvm_rmap_head *rmap_head; int i; bool write_protected = false; - slot = kvm_vcpu_gfn_to_memslot(vcpu, gfn); - for (i = PT_PAGE_TABLE_LEVEL; i <= PT_MAX_HUGEPAGE_LEVEL; ++i) { rmap_head = __gfn_to_rmap(gfn, i, slot); - write_protected |= __rmap_write_protect(vcpu->kvm, rmap_head, true); + write_protected |= __rmap_write_protect(kvm, rmap_head, true); } return write_protected; } +static bool rmap_write_protect(struct kvm_vcpu *vcpu, u64 gfn) +{ + struct kvm_memory_slot *slot; + + slot = kvm_vcpu_gfn_to_memslot(vcpu, gfn); + return kvm_mmu_slot_gfn_write_protect(vcpu->kvm, slot, gfn); +} + static bool kvm_zap_rmapp(struct kvm *kvm, struct kvm_rmap_head *rmap_head) { u64 *sptep; diff --git a/arch/x86/kvm/mmu.h b/arch/x86/kvm/mmu.h index de92bed..58fe98a 100644 --- a/arch/x86/kvm/mmu.h +++ b/arch/x86/kvm/mmu.h @@ -177,4 +177,6 @@ void kvm_zap_gfn_range(struct kvm *kvm, gfn_t gfn_start, gfn_t gfn_end); void kvm_mmu_gfn_disallow_lpage(struct kvm_memory_slot *slot, gfn_t gfn); void kvm_mmu_gfn_allow_lpage(struct kvm_memory_slot *slot, gfn_t gfn); +bool kvm_mmu_slot_gfn_write_protect(struct kvm *kvm, + struct kvm_memory_slot *slot, u64 gfn); #endif