KVM: Use new smp_call_function_mask() in kvm_flush_remote_tlbs()
In kvm_flush_remote_tlbs(), replace a loop using smp_call_function_single() by a single call to smp_call_function_mask() (which is new for x86_64). Signed-off-by: Laurent Vivier <Laurent.Vivier@bull.net> Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
parent
83d87d1673
commit
49d3bd7e2b
|
@ -198,21 +198,15 @@ static void vcpu_put(struct kvm_vcpu *vcpu)
|
|||
|
||||
static void ack_flush(void *_completed)
|
||||
{
|
||||
atomic_t *completed = _completed;
|
||||
|
||||
atomic_inc(completed);
|
||||
}
|
||||
|
||||
void kvm_flush_remote_tlbs(struct kvm *kvm)
|
||||
{
|
||||
int i, cpu, needed;
|
||||
int i, cpu;
|
||||
cpumask_t cpus;
|
||||
struct kvm_vcpu *vcpu;
|
||||
atomic_t completed;
|
||||
|
||||
atomic_set(&completed, 0);
|
||||
cpus_clear(cpus);
|
||||
needed = 0;
|
||||
for (i = 0; i < KVM_MAX_VCPUS; ++i) {
|
||||
vcpu = kvm->vcpus[i];
|
||||
if (!vcpu)
|
||||
|
@ -221,23 +215,9 @@ void kvm_flush_remote_tlbs(struct kvm *kvm)
|
|||
continue;
|
||||
cpu = vcpu->cpu;
|
||||
if (cpu != -1 && cpu != raw_smp_processor_id())
|
||||
if (!cpu_isset(cpu, cpus)) {
|
||||
cpu_set(cpu, cpus);
|
||||
++needed;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* We really want smp_call_function_mask() here. But that's not
|
||||
* available, so ipi all cpus in parallel and wait for them
|
||||
* to complete.
|
||||
*/
|
||||
for (cpu = first_cpu(cpus); cpu != NR_CPUS; cpu = next_cpu(cpu, cpus))
|
||||
smp_call_function_single(cpu, ack_flush, &completed, 1, 0);
|
||||
while (atomic_read(&completed) != needed) {
|
||||
cpu_relax();
|
||||
barrier();
|
||||
cpu_set(cpu, cpus);
|
||||
}
|
||||
smp_call_function_mask(cpus, ack_flush, NULL, 1);
|
||||
}
|
||||
|
||||
int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id)
|
||||
|
|
Loading…
Reference in New Issue