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From e055a194315471312ae2a1d8da4b69c3a5e545a5 Mon Sep 17 00:00:00 2001
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From: "Dr. David Alan Gilbert (git)" <dgilbert@redhat.com>
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Date: Wed, 22 Oct 2014 09:46:36 +0200
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Subject: [PATCH 5/6] kvmclock: Ensure proper env->tsc value for
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kvmclock_current_nsec calculation
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Message-id: <1413971197-4624-5-git-send-email-dgilbert@redhat.com>
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Patchwork-id: 61790
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O-Subject: [RHEL-7.1 qemu-kvm PATCH 4/5] kvmclock: Ensure proper env->tsc value for kvmclock_current_nsec calculation
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Bugzilla: 1098602 1130428
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RH-Acked-by: Marcelo Tosatti <mtosatti@redhat.com>
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RH-Acked-by: Eduardo Habkost <ehabkost@redhat.com>
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RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
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From: Marcelo Tosatti <mtosatti@redhat.com>
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Ensure proper env->tsc value for kvmclock_current_nsec calculation.
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Reported-by: Marcin Gibuła <m.gibula@beyond.pl>
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Analyzed-by: Marcin Gibuła <m.gibula@beyond.pl>
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Cc: qemu-stable@nongnu.org
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Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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(cherry picked from commit 317b0a6d8ba44e9bf8f9c3dbd776c4536843d82c)
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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hw/i386/kvm/clock.c | 4 ++++
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1 file changed, 4 insertions(+)
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diff --git a/hw/i386/kvm/clock.c b/hw/i386/kvm/clock.c
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index 6d6f3a7..53056d4 100644
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--- a/hw/i386/kvm/clock.c
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+++ b/hw/i386/kvm/clock.c
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@@ -16,6 +16,7 @@
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#include "qemu-common.h"
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#include "sysemu/sysemu.h"
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#include "sysemu/kvm.h"
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+#include "sysemu/cpus.h"
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#include "hw/sysbus.h"
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#include "hw/kvm/clock.h"
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@@ -69,6 +70,9 @@ static void kvmclock_vm_state_change(void *opaque, int running,
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if (s->clock_valid) {
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return;
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}
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+
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+ cpu_synchronize_all_states();
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+ cpu_clean_all_dirty();
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ret = kvm_vm_ioctl(kvm_state, KVM_GET_CLOCK, &data);
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if (ret < 0) {
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fprintf(stderr, "KVM_GET_CLOCK failed: %s\n", strerror(ret));
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--
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1.8.3.1
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