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-rw-r--r--arch/x86/kvm/irq.c98
1 files changed, 98 insertions, 0 deletions
diff --git a/arch/x86/kvm/irq.c b/arch/x86/kvm/irq.c
new file mode 100644
index 00000000000..07a09aad4fd
--- /dev/null
+++ b/arch/x86/kvm/irq.c
@@ -0,0 +1,98 @@
+/*
+ * irq.c: API for in kernel interrupt controller
+ * Copyright (c) 2007, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ * Authors:
+ * Yaozu (Eddie) Dong <Eddie.dong@intel.com>
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/kvm_host.h>
+
+#include "irq.h"
+
+/*
+ * check if there is pending interrupt without
+ * intack.
+ */
+int kvm_cpu_has_interrupt(struct kvm_vcpu *v)
+{
+ struct kvm_pic *s;
+
+ if (kvm_apic_has_interrupt(v) == -1) { /* LAPIC */
+ if (kvm_apic_accept_pic_intr(v)) {
+ s = pic_irqchip(v->kvm); /* PIC */
+ return s->output;
+ } else
+ return 0;
+ }
+ return 1;
+}
+EXPORT_SYMBOL_GPL(kvm_cpu_has_interrupt);
+
+/*
+ * Read pending interrupt vector and intack.
+ */
+int kvm_cpu_get_interrupt(struct kvm_vcpu *v)
+{
+ struct kvm_pic *s;
+ int vector;
+
+ vector = kvm_get_apic_interrupt(v); /* APIC */
+ if (vector == -1) {
+ if (kvm_apic_accept_pic_intr(v)) {
+ s = pic_irqchip(v->kvm);
+ s->output = 0; /* PIC */
+ vector = kvm_pic_read_irq(s);
+ }
+ }
+ return vector;
+}
+EXPORT_SYMBOL_GPL(kvm_cpu_get_interrupt);
+
+static void vcpu_kick_intr(void *info)
+{
+#ifdef DEBUG
+ struct kvm_vcpu *vcpu = (struct kvm_vcpu *)info;
+ printk(KERN_DEBUG "vcpu_kick_intr %p \n", vcpu);
+#endif
+}
+
+void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
+{
+ int ipi_pcpu = vcpu->cpu;
+
+ if (waitqueue_active(&vcpu->wq)) {
+ wake_up_interruptible(&vcpu->wq);
+ ++vcpu->stat.halt_wakeup;
+ }
+ if (vcpu->guest_mode)
+ smp_call_function_single(ipi_pcpu, vcpu_kick_intr, vcpu, 0, 0);
+}
+
+void kvm_inject_pending_timer_irqs(struct kvm_vcpu *vcpu)
+{
+ kvm_inject_apic_timer_irqs(vcpu);
+ /* TODO: PIT, RTC etc. */
+}
+EXPORT_SYMBOL_GPL(kvm_inject_pending_timer_irqs);
+
+void kvm_timer_intr_post(struct kvm_vcpu *vcpu, int vec)
+{
+ kvm_apic_timer_intr_post(vcpu, vec);
+ /* TODO: PIT, RTC etc. */
+}
+EXPORT_SYMBOL_GPL(kvm_timer_intr_post);