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

[Michael Roth]

From: Marcelo Tosatti <mtosa...@redhat.com>

Ensure proper env->tsc value for kvmclock_current_nsec calculation.

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

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));
-- 
1.9.1