From: Fernando Luis Vázquez Cao <fernando...@lab.ntt.co.jp>
Newer kernels are capable of synchronizing TSC values of multiple VCPUs
on writeback, but we were excluding the power up case, which is not needed
anymore.
Signed-off-by: Fernando Luis Vazquez Cao <ferna...@oss.ntt.co.jp>
Signed-off-by: Paolo Bonzini <pbonz...@redhat.com>
Signed-off-by: Fernando Luis Vázquez Cao <fernando...@lab.ntt.co.jp>
---
target-i386/kvm.c | 10 +---------
1 file changed, 1 insertion(+), 9 deletions(-)
diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index 01ebca2..312a46b 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -1151,15 +1151,7 @@ static int kvm_put_msrs(X86CPU *cpu, int level)
}
#endif
if (level == KVM_PUT_FULL_STATE) {
- /*
- * KVM is yet unable to synchronize TSC values of multiple VCPUs on
- * writeback. Until this is fixed, we only write the offset to SMP
- * guests after migration, desynchronizing the VCPUs, but avoiding
- * huge jump-backs that would occur without any writeback at all.
- */
- if (smp_cpus == 1 || env->tsc != 0) {
- kvm_msr_entry_set(&msrs[n++], MSR_IA32_TSC, env->tsc);
- }
+ kvm_msr_entry_set(&msrs[n++], MSR_IA32_TSC, env->tsc);
}
/*
* The following MSRs have side effects on the guest or are too heavy
--
1.8.3.1
