KVM: x86: Restrict writeback of VCPU state

Do not write nmi_pending, sipi_vector, and mpstate unless we at least go
through a reset. And TSC as well as KVM wallclocks should only be
written on full sync, otherwise we risk to drop some time on during
state read-modify-write.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/kvm.h b/kvm.h
index 874506b3b..afc7ee023 100644
--- a/kvm.h
+++ b/kvm.h
@@ -44,7 +44,7 @@ int kvm_log_stop(target_phys_addr_t phys_addr, ram_addr_t size);
 int kvm_has_sync_mmu(void);
 int kvm_has_vcpu_events(void);
 int kvm_has_robust_singlestep(void);
-int kvm_put_vcpu_events(CPUState *env);
+int kvm_put_vcpu_events(CPUState *env, int level);
 int kvm_get_vcpu_events(CPUState *env);
 
 void kvm_cpu_register_phys_memory_client(void);