tree 6c48088104c0a82dafed244598b8154613447302
parent cdea50ede1b8a2efe989fafc57260053b180219f
author Glauber Costa <glommer@redhat.com> 1296760793 -0500
committer Marcelo Tosatti <mtosatti@redhat.com> 1297694386 -0200

kvm: make tsc stable over migration and machine start

If the machine is stopped, we should not record two different tsc values
upon a save operation. The same problem happens with kvmclock.

But kvmclock is taking a different diretion, being now seen as a separate
device. Since this is unlikely to happen with the tsc, I am taking the
approach here of simply registering a handler for state change, and
using a per-CPUState variable that prevents double updates for the TSC.

Signed-off-by: Glauber Costa <glommer@redhat.com>
CC: Jan Kiszka <jan.kiszka@web.de>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>