From: Glauber Costa <gcosta@redhat.com>
To: kvm-devel@lists.sourceforge.net
Cc: chrisw@sous-sol.org, avi@qumranet.com, Glauber Costa <gcosta@redhat.com>
Subject: [PATCH 1/4] [PATCH] kvmclock: release time_page if msr is rewritten
Date: Wed, 5 Mar 2008 15:41:29 -0300 [thread overview]
Message-ID: <1204742492-20738-2-git-send-email-gcosta@redhat.com> (raw)
In-Reply-To: <1204742492-20738-1-git-send-email-gcosta@redhat.com>
If the calling cpu rewrites the system clock msr for any reason,
release the page we allocated in the last time
Signed-off-by: Glauber Costa <gcosta@redhat.com>
---
arch/x86/kvm/x86.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index e65a9d6..6abd784 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -588,6 +588,9 @@ int kvm_set_msr_common(struct kvm_vcpu *
kvm_write_wall_clock(vcpu->kvm, data);
break;
case MSR_KVM_SYSTEM_TIME: {
+ if (vcpu->arch.time_page)
+ kvm_release_page_dirty(vcpu->arch.time_page);
+
vcpu->arch.time = data & PAGE_MASK;
vcpu->arch.time_offset = data & ~PAGE_MASK;
--
1.4.2
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next prev parent reply other threads:[~2008-03-05 18:41 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-05 18:41 [PATCH 0/4] kvmclock fixes Glauber Costa
2008-03-05 18:41 ` Glauber Costa [this message]
2008-03-05 18:41 ` [PATCH 2/4] [PATCH] cacheline-align kvmclock structures Glauber Costa
2008-03-05 18:41 ` [PATCH 3/4] [PATCH] kvmclock: allow it to be turned off Glauber Costa
2008-03-05 18:41 ` [PATCH 4/4] [PATCH] cleanup leftovers Glauber Costa
2008-03-06 6:49 ` Avi Kivity
2008-03-06 6:47 ` [PATCH 3/4] [PATCH] kvmclock: allow it to be turned off Avi Kivity
2008-03-06 12:01 ` Glauber Costa
2008-03-06 12:11 ` Avi Kivity
2008-03-06 12:15 ` Glauber Costa
2008-03-06 6:45 ` [PATCH 2/4] [PATCH] cacheline-align kvmclock structures Avi Kivity
2008-03-06 6:42 ` [PATCH 1/4] [PATCH] kvmclock: release time_page if msr is rewritten Avi Kivity
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