motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-05 16:53:55 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

kvm: make tsc stable over migration and machine start

Browse source 
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>
This commit is contained in:
Glauber Costa 2011-02-03 14:19:53 -05:00 • committed by Marcelo Tosatti
parent cdea50ede1
commit b8cc45d6a6
2 changed files with 18 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

1
target-i386/cpu.h
View file

@ -734,6 +734,7 @@ typedef struct CPUX86State {
uint32_t sipi_vector;
uint32_t cpuid_kvm_features;
uint32_t cpuid_svm_features;
bool tsc_valid;
/* in order to simplify APIC support, we leave this pointer to the
user */