From: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
To: Avi Kivity <avi@redhat.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>,
LKML <linux-kernel@vger.kernel.org>,
KVM list <kvm@vger.kernel.org>
Subject: [PATCH 4/7] KVM: MMU: don't mark pte notrap if it's just sync transient
Date: Fri, 11 Jun 2010 21:31:38 +0800 [thread overview]
Message-ID: <4C123ABA.3000601@cn.fujitsu.com> (raw)
In-Reply-To: <4C1239EE.3090904@cn.fujitsu.com>
If the sync-sp just sync transient, don't mark its pte notrap
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
---
arch/x86/include/asm/kvm_host.h | 2 +-
arch/x86/kvm/mmu.c | 11 ++++-------
arch/x86/kvm/paging_tmpl.h | 5 +++--
3 files changed, 8 insertions(+), 10 deletions(-)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 91631b8..fb72bd7 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -241,7 +241,7 @@ struct kvm_mmu {
void (*prefetch_page)(struct kvm_vcpu *vcpu,
struct kvm_mmu_page *page);
int (*sync_page)(struct kvm_vcpu *vcpu,
- struct kvm_mmu_page *sp);
+ struct kvm_mmu_page *sp, bool clear_unsync);
void (*invlpg)(struct kvm_vcpu *vcpu, gva_t gva);
hpa_t root_hpa;
int root_level;
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 2ffd673..18c14c5 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -1103,7 +1103,7 @@ static void nonpaging_prefetch_page(struct kvm_vcpu *vcpu,
}
static int nonpaging_sync_page(struct kvm_vcpu *vcpu,
- struct kvm_mmu_page *sp)
+ struct kvm_mmu_page *sp, bool clear_unsync)
{
return 1;
}
@@ -1228,7 +1228,7 @@ static int __kvm_sync_page(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp,
if (clear_unsync)
kvm_unlink_unsync_page(vcpu->kvm, sp);
- if (vcpu->arch.mmu.sync_page(vcpu, sp)) {
+ if (vcpu->arch.mmu.sync_page(vcpu, sp, clear_unsync)) {
kvm_mmu_prepare_zap_page(vcpu->kvm, sp, invalid_list);
return 1;
}
@@ -1237,7 +1237,6 @@ 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)
{
@@ -1245,9 +1244,7 @@ static int kvm_sync_page_transient(struct kvm_vcpu *vcpu,
int ret;
ret = __kvm_sync_page(vcpu, sp, &invalid_list, false);
- if (!ret)
- mmu_convert_notrap(sp);
- else
+ if (ret)
kvm_mmu_commit_zap_page(vcpu->kvm, &invalid_list);
return ret;
@@ -1273,7 +1270,7 @@ static void kvm_sync_pages(struct kvm_vcpu *vcpu, gfn_t gfn)
WARN_ON(s->role.level != PT_PAGE_TABLE_LEVEL);
if ((s->role.cr4_pae != !!is_pae(vcpu)) ||
- (vcpu->arch.mmu.sync_page(vcpu, s))) {
+ (vcpu->arch.mmu.sync_page(vcpu, s, true))) {
kvm_mmu_prepare_zap_page(vcpu->kvm, s, &invalid_list);
continue;
}
diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h
index 876e705..3ebc5a0 100644
--- a/arch/x86/kvm/paging_tmpl.h
+++ b/arch/x86/kvm/paging_tmpl.h
@@ -577,7 +577,8 @@ static void FNAME(prefetch_page)(struct kvm_vcpu *vcpu,
* can't change unless all sptes pointing to it are nuked first.
* - Alias changes zap the entire shadow cache.
*/
-static int FNAME(sync_page)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp)
+static int FNAME(sync_page)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp,
+ bool clear_unsync)
{
int i, offset, nr_present;
bool reset_host_protection;
@@ -614,7 +615,7 @@ static int FNAME(sync_page)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp)
u64 nonpresent;
rmap_remove(vcpu->kvm, &sp->spt[i]);
- if (is_present_gpte(gpte))
+ if (is_present_gpte(gpte) || !clear_unsync)
nonpresent = shadow_trap_nonpresent_pte;
else
nonpresent = shadow_notrap_nonpresent_pte;
--
1.6.1.2
next prev parent reply other threads:[~2010-06-11 13:35 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-11 13:28 [PATCH 1/7] KVM: MMU: rename 'page' and 'shadow_page' to 'sp' Xiao Guangrong
2010-06-11 13:29 ` [PATCH 2/7] KVM: MMU: cleanup for dirty page judgment Xiao Guangrong
2010-06-11 13:30 ` [PATCH 3/7] KVM: MMU: avoid double write protected in sync page path Xiao Guangrong
2010-06-11 13:31 ` Xiao Guangrong [this message]
2010-06-11 13:32 ` [PATCH 5/7] KVM: MMU: cleanup for __mmu_unsync_walk() Xiao Guangrong
2010-06-11 13:34 ` [PATCH 6/7] KVM: MMU: clear unsync_child_bitmap completely Xiao Guangrong
2010-06-11 20:14 ` [PATCH 4/7] KVM: MMU: don't mark pte notrap if it's just sync transient Marcelo Tosatti
2010-06-12 2:38 ` Xiao Guangrong
2010-06-11 13:35 ` [PATCH 7/7] KVM: MMU: don't walk every parent pages while mark unsync Xiao Guangrong
2010-06-11 13:43 ` Xiao Guangrong
2010-06-14 22:07 ` Marcelo Tosatti
2010-06-15 1:32 ` Xiao Guangrong
2010-06-15 20:06 ` Marcelo Tosatti
2010-06-15 20:09 ` Marcelo Tosatti
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