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kvmclock: Ensure proper env->tsc value for kvmclock_current_nsec calculation 

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>
This commit is contained in:
Marcelo Tosatti 2014-09-05 10:52:47 -03:00 committed by Paolo Bonzini
parent de9d61e83d
commit 317b0a6d8b
1 changed files with 4 additions and 0 deletions
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4
hw/i386/kvm/clock.c
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@ -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));