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kvm: synchronize state from cpu context 

It is not safe to retrieve the KVM internal state of a given cpu
while its potentially modifying it.

Queue the request to run on cpu context, similarly to qemu-kvm.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Jan Kiszka 2010-05-04 09:45:23 -03:00 committed by Marcelo Tosatti
parent e82bcec25f
commit 2705d56a6a
1 changed files with 9 additions and 1 deletions
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kvm-all.c
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@ -796,14 +796,22 @@ void kvm_flush_coalesced_mmio_buffer(void)
#endif
}
void kvm_cpu_synchronize_state(CPUState *env)
static void do_kvm_cpu_synchronize_state(void *_env)
{
CPUState *env = _env;
if (!env->kvm_vcpu_dirty) {
kvm_arch_get_registers(env);
env->kvm_vcpu_dirty = 1;
}
}
void kvm_cpu_synchronize_state(CPUState *env)
{
if (!env->kvm_vcpu_dirty)
run_on_cpu(env, do_kvm_cpu_synchronize_state, env);
}
void kvm_cpu_synchronize_post_reset(CPUState *env)
{
kvm_arch_put_registers(env, KVM_PUT_RESET_STATE);