The ACPI PM timer is sometimes broken on live migration.
Since vcpu->arch.hvm_vcpu.guest_time is zero in most cases.
Without this patch, the clock of windows server 2012R2 without HPET
might leap forward several minutes on live migration.
Signed-off-by: Kouya Shimura <ko...@jp.fujitsu.com>
---
xen/arch/x86/hvm/pmtimer.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/xen/arch/x86/hvm/pmtimer.c b/xen/arch/x86/hvm/pmtimer.c
index 07594e1..282efd0 100644
--- a/xen/arch/x86/hvm/pmtimer.c
+++ b/xen/arch/x86/hvm/pmtimer.c
@@ -252,7 +252,7 @@ static int pmtimer_save(struct domain *d,
hvm_domain_context_t *h)
/* Update the counter to the guest's current time. We always save
* with the domain paused, so the saved time should be after the
* last_gtime, but just in case, make sure we only go forwards */
- x = ((s->vcpu->arch.hvm_vcpu.guest_time - s->last_gtime) * s->scale) >> 32;
+ x = ((hvm_get_guest_time(s->vcpu) - s->last_gtime) * s->scale) >> 32;
if ( x < 1UL<<31 )
s->pm.tmr_val += x;
if ( (s->pm.tmr_val & TMR_VAL_MSB) != msb )
--
1.9.1
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xen.org
http://lists.xen.org/xen-devel
