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| author | Rusty Russell <rusty@rustcorp.com.au> | 2008-12-08 20:26:24 +1030 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2008-12-31 16:55:45 +0200 |
| commit | 498468961ed6f62a306eb90c49125776c526fa40 (patch) | |
| tree | ace5ccb27e61124040aa0add338bf4bb480275dd /virt | |
| parent | 3d3aab1b973b01bd2a1aa46307e94a1380b1d802 (diff) | |
| download | kernel_samsung_tuna-498468961ed6f62a306eb90c49125776c526fa40.zip kernel_samsung_tuna-498468961ed6f62a306eb90c49125776c526fa40.tar.gz kernel_samsung_tuna-498468961ed6f62a306eb90c49125776c526fa40.tar.bz2 | |
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.c | 44 |
1 files changed, 15 insertions, 29 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 484c903..ba4275d 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) { |