From patchwork Thu Jun 30 08:22:20 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiao Guangrong X-Patchwork-Id: 932032 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter1.kernel.org (8.14.4/8.14.4) with ESMTP id p5U8Kp8l025657 for ; Thu, 30 Jun 2011 08:20:51 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758716Ab1F3IU3 (ORCPT ); Thu, 30 Jun 2011 04:20:29 -0400 Received: from cn.fujitsu.com ([222.73.24.84]:59365 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1752682Ab1F3IU1 (ORCPT ); Thu, 30 Jun 2011 04:20:27 -0400 Received: from tang.cn.fujitsu.com (tang.cn.fujitsu.com [10.167.250.3]) by song.cn.fujitsu.com (Postfix) with ESMTP id 10E25170080; Thu, 30 Jun 2011 16:20:25 +0800 (CST) Received: from mailserver.fnst.cn.fujitsu.com (tang.cn.fujitsu.com [127.0.0.1]) by tang.cn.fujitsu.com (8.14.3/8.13.1) with ESMTP id p5U8KNQc010136; Thu, 30 Jun 2011 16:20:23 +0800 Received: from localhost.localdomain ([10.167.225.99]) by mailserver.fnst.cn.fujitsu.com (Lotus Domino Release 8.5.1FP4) with ESMTP id 2011063016195175-711214 ; Thu, 30 Jun 2011 16:19:51 +0800 Message-ID: <4E0C323C.7080008@cn.fujitsu.com> Date: Thu, 30 Jun 2011 16:22:20 +0800 From: Xiao Guangrong User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.17) Gecko/20110428 Fedora/3.1.10-1.fc15 Thunderbird/3.1.10 MIME-Version: 1.0 To: Avi Kivity CC: Marcelo Tosatti , LKML , KVM Subject: [PATCH v3 07/19] KVM: MMU: rename 'pt_write' to 'emulate' References: <4E0C3178.2080603@cn.fujitsu.com> In-Reply-To: <4E0C3178.2080603@cn.fujitsu.com> X-MIMETrack: Itemize by SMTP Server on mailserver/fnst(Release 8.5.1FP4|July 25, 2010) at 2011-06-30 16:19:51, Serialize by Router on mailserver/fnst(Release 8.5.1FP4|July 25, 2010) at 2011-06-30 16:19:53, Serialize complete at 2011-06-30 16:19:53 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter1.kernel.org [140.211.167.41]); Thu, 30 Jun 2011 08:20:51 +0000 (UTC) If 'pt_write' is true, we need to emulate the fault. And in later patch, we need to emulate the fault even though it is not a pt_write event, so rename it to better fit the meaning Signed-off-by: Xiao Guangrong --- arch/x86/kvm/mmu.c | 10 +++++----- arch/x86/kvm/paging_tmpl.h | 16 ++++++++-------- 2 files changed, 13 insertions(+), 13 deletions(-) diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 98812c2..a62ba46 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -2023,7 +2023,7 @@ done: static void mmu_set_spte(struct kvm_vcpu *vcpu, u64 *sptep, unsigned pt_access, unsigned pte_access, int user_fault, int write_fault, - int *ptwrite, int level, gfn_t gfn, + int *emulate, int level, gfn_t gfn, pfn_t pfn, bool speculative, bool host_writable) { @@ -2061,7 +2061,7 @@ static void mmu_set_spte(struct kvm_vcpu *vcpu, u64 *sptep, level, gfn, pfn, speculative, true, host_writable)) { if (write_fault) - *ptwrite = 1; + *emulate = 1; kvm_mmu_flush_tlb(vcpu); } @@ -2184,7 +2184,7 @@ static int __direct_map(struct kvm_vcpu *vcpu, gpa_t v, int write, { struct kvm_shadow_walk_iterator iterator; struct kvm_mmu_page *sp; - int pt_write = 0; + int emulate = 0; gfn_t pseudo_gfn; for_each_shadow_entry(vcpu, (u64)gfn << PAGE_SHIFT, iterator) { @@ -2192,7 +2192,7 @@ static int __direct_map(struct kvm_vcpu *vcpu, gpa_t v, int write, unsigned pte_access = ACC_ALL; mmu_set_spte(vcpu, iterator.sptep, ACC_ALL, pte_access, - 0, write, &pt_write, + 0, write, &emulate, level, gfn, pfn, prefault, map_writable); direct_pte_prefetch(vcpu, iterator.sptep); ++vcpu->stat.pf_fixed; @@ -2220,7 +2220,7 @@ static int __direct_map(struct kvm_vcpu *vcpu, gpa_t v, int write, | shadow_accessed_mask); } } - return pt_write; + return emulate; } static void kvm_send_hwpoison_signal(unsigned long address, struct task_struct *tsk) diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h index e9ee473..1e534e0 100644 --- a/arch/x86/kvm/paging_tmpl.h +++ b/arch/x86/kvm/paging_tmpl.h @@ -473,7 +473,7 @@ static void FNAME(pte_prefetch)(struct kvm_vcpu *vcpu, struct guest_walker *gw, static u64 *FNAME(fetch)(struct kvm_vcpu *vcpu, gva_t addr, struct guest_walker *gw, int user_fault, int write_fault, int hlevel, - int *ptwrite, pfn_t pfn, bool map_writable, + int *emulate, pfn_t pfn, bool map_writable, bool prefault) { unsigned access = gw->pt_access; @@ -544,7 +544,7 @@ static u64 *FNAME(fetch)(struct kvm_vcpu *vcpu, gva_t addr, } mmu_set_spte(vcpu, it.sptep, access, gw->pte_access, - user_fault, write_fault, ptwrite, it.level, + user_fault, write_fault, emulate, it.level, gw->gfn, pfn, prefault, map_writable); FNAME(pte_prefetch)(vcpu, gw, it.sptep); @@ -578,7 +578,7 @@ static int FNAME(page_fault)(struct kvm_vcpu *vcpu, gva_t addr, u32 error_code, int user_fault = error_code & PFERR_USER_MASK; struct guest_walker walker; u64 *sptep; - int write_pt = 0; + int emulate = 0; int r; pfn_t pfn; int level = PT_PAGE_TABLE_LEVEL; @@ -639,19 +639,19 @@ static int FNAME(page_fault)(struct kvm_vcpu *vcpu, gva_t addr, u32 error_code, if (!force_pt_level) transparent_hugepage_adjust(vcpu, &walker.gfn, &pfn, &level); sptep = FNAME(fetch)(vcpu, addr, &walker, user_fault, write_fault, - level, &write_pt, pfn, map_writable, prefault); + level, &emulate, pfn, map_writable, prefault); (void)sptep; - pgprintk("%s: shadow pte %p %llx ptwrite %d\n", __func__, - sptep, *sptep, write_pt); + pgprintk("%s: shadow pte %p %llx emulate %d\n", __func__, + sptep, *sptep, emulate); - if (!write_pt) + if (!emulate) vcpu->arch.last_pt_write_count = 0; /* reset fork detector */ ++vcpu->stat.pf_fixed; trace_kvm_mmu_audit(vcpu, AUDIT_POST_PAGE_FAULT); spin_unlock(&vcpu->kvm->mmu_lock); - return write_pt; + return emulate; out_unlock: spin_unlock(&vcpu->kvm->mmu_lock);