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authorRusty Russell <rusty@rustcorp.com.au>2008-12-08 20:26:24 +1030
committerAvi Kivity <avi@redhat.com>2008-12-31 16:55:45 +0200
commit498468961ed6f62a306eb90c49125776c526fa40 (patch)
treeace5ccb27e61124040aa0add338bf4bb480275dd /virt
parent3d3aab1b973b01bd2a1aa46307e94a1380b1d802 (diff)
downloadlinux-498468961ed6f62a306eb90c49125776c526fa40.tar.gz
KVM: Extract core of kvm_flush_remote_tlbs/kvm_reload_remote_mmus
Avi said: > Wow, code duplication from Rusty. Things must be bad. Something about glass houses comes to mind. But instead, a patch. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/kvm_main.c44
1 files changed, 15 insertions, 29 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 484c903544f..ba4275d06fb 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -552,10 +552,11 @@ static void ack_flush(void *_completed)
{
}
-void kvm_flush_remote_tlbs(struct kvm *kvm)
+static bool make_all_cpus_request(struct kvm *kvm, unsigned int req)
{
int i, cpu, me;
cpumask_t cpus;
+ bool called = false;
struct kvm_vcpu *vcpu;
me = get_cpu();
@@ -564,45 +565,30 @@ void kvm_flush_remote_tlbs(struct kvm *kvm)
vcpu = kvm->vcpus[i];
if (!vcpu)
continue;
- if (test_and_set_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests))
+ if (test_and_set_bit(req, &vcpu->requests))
continue;
cpu = vcpu->cpu;
if (cpu != -1 && cpu != me)
cpu_set(cpu, cpus);
}
- if (cpus_empty(cpus))
- goto out;
- ++kvm->stat.remote_tlb_flush;
- smp_call_function_mask(cpus, ack_flush, NULL, 1);
-out:
+ if (!cpus_empty(cpus)) {
+ smp_call_function_mask(cpus, ack_flush, NULL, 1);
+ called = true;
+ }
put_cpu();
+ return called;
}
-void kvm_reload_remote_mmus(struct kvm *kvm)
+void kvm_flush_remote_tlbs(struct kvm *kvm)
{
- int i, cpu, me;
- cpumask_t cpus;
- struct kvm_vcpu *vcpu;
-
- me = get_cpu();
- cpus_clear(cpus);
- for (i = 0; i < KVM_MAX_VCPUS; ++i) {
- vcpu = kvm->vcpus[i];
- if (!vcpu)
- continue;
- if (test_and_set_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests))
- continue;
- cpu = vcpu->cpu;
- if (cpu != -1 && cpu != me)
- cpu_set(cpu, cpus);
- }
- if (cpus_empty(cpus))
- goto out;
- smp_call_function_mask(cpus, ack_flush, NULL, 1);
-out:
- put_cpu();
+ if (make_all_cpus_request(kvm, KVM_REQ_TLB_FLUSH))
+ ++kvm->stat.remote_tlb_flush;
}
+void kvm_reload_remote_mmus(struct kvm *kvm)
+{
+ make_all_cpus_request(kvm, KVM_REQ_MMU_RELOAD);
+}
int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id)
{