diff options
| author | Jan Kiszka <jan.kiszka@siemens.com> | 2011-01-21 21:48:14 +0100 |
|---|---|---|
| committer | Marcelo Tosatti <mtosatti@redhat.com> | 2011-01-23 02:27:21 -0200 |
| commit | ff5c186b8b6169bf25a6f30670a75fb9d4c945e3 (patch) | |
| tree | 89dab1f74ae6d2b095991c9d24e19ae7d5724568 /target-i386 | |
| parent | c3a3a7d356c4df2fe145037172ae52cba5f545a5 (diff) | |
kvm: x86: Reset paravirtual MSRs
Make sure to write the cleared MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK,
and MSR_KVM_ASYNC_PF_EN to the kernel state so that a freshly booted
guest cannot be disturbed by old values.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
CC: Glauber Costa <glommer@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'target-i386')
| -rw-r--r-- | target-i386/kvm.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/target-i386/kvm.c b/target-i386/kvm.c index 454ddb182..825af428d 100644 --- a/target-i386/kvm.c +++ b/target-i386/kvm.c @@ -845,6 +845,13 @@ static int kvm_put_msrs(CPUState *env, int level) if (smp_cpus == 1 || env->tsc != 0) { kvm_msr_entry_set(&msrs[n++], MSR_IA32_TSC, env->tsc); } + } + /* + * The following paravirtual MSRs have side effects on the guest or are + * too heavy for normal writeback. Limit them to reset or full state + * updates. + */ + if (level >= KVM_PUT_RESET_STATE) { kvm_msr_entry_set(&msrs[n++], MSR_KVM_SYSTEM_TIME, env->system_time_msr); kvm_msr_entry_set(&msrs[n++], MSR_KVM_WALL_CLOCK, env->wall_clock_msr); |