KVM: Accelerated apic support

[linux-2.6-omap-h63xx.git] / arch / x86 / kvm / x86.c

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index c2b80884447e881581e786fc8d1bbd93c93ef30a..e7eac27adb7fe525d48900c8477c9d6e1ca81862 100644 (file)
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -1173,6 +1173,19 @@ long kvm_arch_vcpu_ioctl(struct file *filp,
                r = 0;
                break;
        };
+       case KVM_SET_VAPIC_ADDR: {
+               struct kvm_vapic_addr va;
+
+               r = -EINVAL;
+               if (!irqchip_in_kernel(vcpu->kvm))
+                       goto out;
+               r = -EFAULT;
+               if (copy_from_user(&va, argp, sizeof va))
+                       goto out;
+               r = 0;
+               kvm_lapic_set_vapic_addr(vcpu, va.vapic_addr);
+               break;
+       }
        default:
                r = -EINVAL;
        }
@@ -2214,6 +2227,9 @@ int kvm_emulate_hypercall(struct kvm_vcpu *vcpu)
        }
 
        switch (nr) {
+       case KVM_HC_VAPIC_POLL_IRQ:
+               ret = 0;
+               break;
        default:
                ret = -KVM_ENOSYS;
                break;
@@ -2421,6 +2437,29 @@ static void post_kvm_run_save(struct kvm_vcpu *vcpu,
                                         vcpu->arch.irq_summary == 0);
 }
 
+static void vapic_enter(struct kvm_vcpu *vcpu)
+{
+       struct kvm_lapic *apic = vcpu->arch.apic;
+       struct page *page;
+
+       if (!apic || !apic->vapic_addr)
+               return;
+
+       page = gfn_to_page(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT);
+       vcpu->arch.apic->vapic_page = page;
+}
+
+static void vapic_exit(struct kvm_vcpu *vcpu)
+{
+       struct kvm_lapic *apic = vcpu->arch.apic;
+
+       if (!apic || !apic->vapic_addr)
+               return;
+
+       kvm_release_page_dirty(apic->vapic_page);
+       mark_page_dirty(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT);
+}
+
 static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 {
        int r;
@@ -2435,6 +2474,8 @@ static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
                vcpu->arch.mp_state = VCPU_MP_STATE_RUNNABLE;
        }
 
+       vapic_enter(vcpu);
+
 preempted:
        if (vcpu->guest_debug.enabled)
                kvm_x86_ops->guest_debug_pre(vcpu);
@@ -2444,6 +2485,14 @@ again:
        if (unlikely(r))
                goto out;
 
+       if (vcpu->requests)
+               if (test_and_clear_bit(KVM_REQ_REPORT_TPR_ACCESS,
+                                      &vcpu->requests)) {
+                       kvm_run->exit_reason = KVM_EXIT_TPR_ACCESS;
+                       r = 0;
+                       goto out;
+               }
+
        kvm_inject_pending_timer_irqs(vcpu);
 
        preempt_disable();
@@ -2469,6 +2518,8 @@ again:
        else
                kvm_x86_ops->inject_pending_vectors(vcpu, kvm_run);
 
+       kvm_lapic_sync_to_vapic(vcpu);
+
        vcpu->guest_mode = 1;
        kvm_guest_enter();
 
@@ -2506,6 +2557,8 @@ again:
        if (vcpu->arch.exception.pending && kvm_x86_ops->exception_injected(vcpu))
                vcpu->arch.exception.pending = false;
 
+       kvm_lapic_sync_from_vapic(vcpu);
+
        r = kvm_x86_ops->handle_exit(kvm_run, vcpu);
 
        if (r > 0) {
@@ -2527,6 +2580,8 @@ out:
 
        post_kvm_run_save(vcpu, kvm_run);
 
+       vapic_exit(vcpu);
+
        return r;
 }