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[06/88] kvmclock: Ensure proper env->tsc value for kvmclock_current_nsec calculation

Message ID 1420738472-23267-7-git-send-email-mdroth@linux.vnet.ibm.com
State New
Headers show

Commit Message

Michael Roth Jan. 8, 2015, 5:33 p.m. UTC 
From: Marcelo Tosatti <mtosatti@redhat.com>

Ensure proper env->tsc value for kvmclock_current_nsec calculation.

Reported-by: Marcin Gibuła <m.gibula@beyond.pl>
Analyzed-by: Marcin Gibuła <m.gibula@beyond.pl>
Cc: qemu-stable@nongnu.org
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit 317b0a6d8ba44e9bf8f9c3dbd776c4536843d82c)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
---
 hw/i386/kvm/clock.c | 4 ++++
 1 file changed, 4 insertions(+)
diff mbox

Patch

diff --git a/hw/i386/kvm/clock.c b/hw/i386/kvm/clock.c
index 07b9c0e..9d65766 100644
--- a/hw/i386/kvm/clock.c
+++ b/hw/i386/kvm/clock.c
@@ -16,6 +16,7 @@ 
 #include "qemu-common.h"
 #include "sysemu/sysemu.h"
 #include "sysemu/kvm.h"
+#include "sysemu/cpus.h"
 #include "hw/sysbus.h"
 #include "hw/kvm/clock.h"
 
@@ -75,6 +76,9 @@  static void kvmclock_vm_state_change(void *opaque, int running,
         if (s->clock_valid) {
             return;
         }
+
+        cpu_synchronize_all_states();
+        cpu_clean_all_dirty();
         ret = kvm_vm_ioctl(kvm_state, KVM_GET_CLOCK, &data);
         if (ret < 0) {
             fprintf(stderr, "KVM_GET_CLOCK failed: %s\n", strerror(ret));