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 <kvm@vger.kernel.org>
Subject: [PATCH v2 1/6] KVM: MMU: fix forgot flush vcpu tlbs
Date: Wed, 17 Nov 2010 12:10:08 +0800 [thread overview]
Message-ID: <4CE355A0.6020907@cn.fujitsu.com> (raw)
Some paths forgot to flush vcpu tlbs after remove rmap, this
patch fix it.
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
---
arch/x86/kvm/mmu.c | 14 +++++++++++---
arch/x86/kvm/paging_tmpl.h | 1 +
2 files changed, 12 insertions(+), 3 deletions(-)
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index bdb9fa9..e008ae7 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -736,10 +736,16 @@ static int set_spte_track_bits(u64 *sptep, u64 new_spte)
return 1;
}
-static void drop_spte(struct kvm *kvm, u64 *sptep, u64 new_spte)
+static bool drop_spte(struct kvm *kvm, u64 *sptep, u64 new_spte)
{
- if (set_spte_track_bits(sptep, new_spte))
+ bool ret = false;
+
+ if (set_spte_track_bits(sptep, new_spte)) {
rmap_remove(kvm, sptep);
+ ret = true;
+ }
+
+ return ret;
}
static u64 *rmap_next(struct kvm *kvm, unsigned long *rmapp, u64 *spte)
@@ -1997,7 +2003,9 @@ static int set_spte(struct kvm_vcpu *vcpu, u64 *sptep,
if (level > PT_PAGE_TABLE_LEVEL &&
has_wrprotected_page(vcpu->kvm, gfn, level)) {
ret = 1;
- drop_spte(vcpu->kvm, sptep, shadow_trap_nonpresent_pte);
+ if (drop_spte(vcpu->kvm, sptep,
+ shadow_trap_nonpresent_pte))
+ kvm_flush_remote_tlbs(vcpu->kvm);
goto done;
}
diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h
index ba00eef..58b4d9a 100644
--- a/arch/x86/kvm/paging_tmpl.h
+++ b/arch/x86/kvm/paging_tmpl.h
@@ -781,6 +781,7 @@ static int FNAME(sync_page)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp,
else
nonpresent = shadow_notrap_nonpresent_pte;
drop_spte(vcpu->kvm, &sp->spt[i], nonpresent);
+ kvm_flush_remote_tlbs(vcpu->kvm);
continue;
}
--
1.7.0.4
next reply other threads:[~2010-11-17 4:05 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-17 4:10 Xiao Guangrong [this message]
2010-11-17 4:10 ` [PATCH v2 2/6] KVM: MMU: don't drop spte if overwrite it from W to RO Xiao Guangrong
2010-11-17 15:42 ` Marcelo Tosatti
2010-11-17 15:57 ` Avi Kivity
2010-11-18 7:12 ` Xiao Guangrong
2010-11-18 15:32 ` Marcelo Tosatti
2010-11-18 16:41 ` Avi Kivity
2010-11-17 4:11 ` [PATCH v2 3/6] KVM: MMU: don't mark spte notrap if reserved bit set Xiao Guangrong
2010-11-17 15:56 ` Marcelo Tosatti
2010-11-17 4:12 ` [PATCH v2 4/6] KVM: MMU: rename 'reset_host_protection' to 'host_writable' Xiao Guangrong
2010-11-17 15:58 ` Marcelo Tosatti
2010-11-17 4:13 ` [PATCH v2 5/6] KVM: MMU: remove 'clear_unsync' parameter Xiao Guangrong
2010-11-17 16:49 ` Marcelo Tosatti
2010-11-18 7:42 ` Xiao Guangrong
2010-11-18 15:43 ` Marcelo Tosatti
2010-11-17 4:13 ` [PATCH v2 6/6] KVM: MMU: cleanup update_pte, pte_prefetch and sync_page functions Xiao Guangrong
2010-11-17 16:55 ` Marcelo Tosatti
2010-11-17 15:29 ` [PATCH v2 1/6] KVM: MMU: fix forgot flush vcpu tlbs Marcelo Tosatti
2010-11-17 16:26 ` Avi Kivity
2010-11-17 17:36 ` Marcelo Tosatti
2010-11-18 7:17 ` Xiao Guangrong
2010-11-18 9:32 ` Avi Kivity
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