linux-kernel - [PATCH] add missing guest clock update removed by e48672fa25e879f7ae21785c7efd187738139593

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Message-ID: <20110307101827.GA1762@pcnci.linuxbox.cz>
Date:	Mon, 7 Mar 2011 11:18:27 +0100
From:	Nikola Ciprich <extmaillist@...uxbox.cz>
To:	KVM list <kvm@...r.kernel.org>,
	Linux kernel list <linux-kernel@...r.kernel.org>
Cc:	nikola.ciprich@...uxbox.cz, Avi Kivity <avi@...hat.com>,
	Zachary Amsden <zamsden@...hat.com>,
	Glauber Costa <glommer@...hat.com>
Subject: [PATCH] add missing guest clock update removed by
	e48672fa25e879f7ae21785c7efd187738139593

e48672fa25e879f7ae21785c7efd187738139593 removed kvm_request_guest_time_update(vcpu);
this breaks 32bit SMP guests using virtio-clock.
thus add unconditional call to kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu) to fix the
problem.

Signed-off-by: Nikola Ciprich <nikola.ciprich@...uxbox.cz>
---
 arch/x86/kvm/x86.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index bcc0efc..4c27144 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -2091,6 +2091,7 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 	}
 
 	kvm_x86_ops->vcpu_load(vcpu, cpu);
+	kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu);
 	if (unlikely(vcpu->cpu != cpu) || check_tsc_unstable()) {
 		/* Make sure TSC doesn't go backwards */
 		s64 tsc_delta = !vcpu->arch.last_host_tsc ? 0 :


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