*/
#include <linux/kvm_host.h>
+
+#include <asm/msidef.h>
+
#include "irq.h"
#include "ioapic.h"
-static void kvm_set_pic_irq(struct kvm_kernel_irq_routing_entry *e,
- struct kvm *kvm, int level)
+static int kvm_set_pic_irq(struct kvm_kernel_irq_routing_entry *e,
+ struct kvm *kvm, int level)
{
#ifdef CONFIG_X86
- kvm_pic_set_irq(pic_irqchip(kvm), e->irqchip.pin, level);
+ return kvm_pic_set_irq(pic_irqchip(kvm), e->irqchip.pin, level);
+#else
+ return -1;
#endif
}
-static void kvm_set_ioapic_irq(struct kvm_kernel_irq_routing_entry *e,
- struct kvm *kvm, int level)
+static int kvm_set_ioapic_irq(struct kvm_kernel_irq_routing_entry *e,
+ struct kvm *kvm, int level)
+{
+ return kvm_ioapic_set_irq(kvm->arch.vioapic, e->irqchip.pin, level);
+}
+
+static int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e,
+ struct kvm *kvm, int level)
{
- kvm_ioapic_set_irq(kvm->arch.vioapic, e->irqchip.pin, level);
+ int vcpu_id, r = -1;
+ struct kvm_vcpu *vcpu;
+ struct kvm_ioapic *ioapic = ioapic_irqchip(kvm);
+ int dest_id = (e->msi.address_lo & MSI_ADDR_DEST_ID_MASK)
+ >> MSI_ADDR_DEST_ID_SHIFT;
+ int vector = (e->msi.data & MSI_DATA_VECTOR_MASK)
+ >> MSI_DATA_VECTOR_SHIFT;
+ int dest_mode = test_bit(MSI_ADDR_DEST_MODE_SHIFT,
+ (unsigned long *)&e->msi.address_lo);
+ int trig_mode = test_bit(MSI_DATA_TRIGGER_SHIFT,
+ (unsigned long *)&e->msi.data);
+ int delivery_mode = test_bit(MSI_DATA_DELIVERY_MODE_SHIFT,
+ (unsigned long *)&e->msi.data);
+ u32 deliver_bitmask;
+
+ BUG_ON(!ioapic);
+
+ deliver_bitmask = kvm_ioapic_get_delivery_bitmask(ioapic,
+ dest_id, dest_mode);
+ /* IOAPIC delivery mode value is the same as MSI here */
+ switch (delivery_mode) {
+ case IOAPIC_LOWEST_PRIORITY:
+ vcpu = kvm_get_lowest_prio_vcpu(ioapic->kvm, vector,
+ deliver_bitmask);
+ if (vcpu != NULL)
+ r = kvm_apic_set_irq(vcpu, vector, trig_mode);
+ else
+ printk(KERN_INFO "kvm: null lowest priority vcpu!\n");
+ break;
+ case IOAPIC_FIXED:
+ for (vcpu_id = 0; deliver_bitmask != 0; vcpu_id++) {
+ if (!(deliver_bitmask & (1 << vcpu_id)))
+ continue;
+ deliver_bitmask &= ~(1 << vcpu_id);
+ vcpu = ioapic->kvm->vcpus[vcpu_id];
+ if (vcpu) {
+ if (r < 0)
+ r = 0;
+ r += kvm_apic_set_irq(vcpu, vector, trig_mode);
+ }
+ }
+ break;
+ default:
+ break;
+ }
+ return r;
}
-/* This should be called with the kvm->lock mutex held */
-void kvm_set_irq(struct kvm *kvm, int irq_source_id, int irq, int level)
+/* This should be called with the kvm->lock mutex held
+ * Return value:
+ * < 0 Interrupt was ignored (masked or not delivered for other reasons)
+ * = 0 Interrupt was coalesced (previous irq is still pending)
+ * > 0 Number of CPUs interrupt was delivered to
+ */
+int kvm_set_irq(struct kvm *kvm, int irq_source_id, int irq, int level)
{
struct kvm_kernel_irq_routing_entry *e;
- unsigned long *irq_state = (unsigned long *)&kvm->arch.irq_states[irq];
+ unsigned long *irq_state, sig_level;
+ int ret = -1;
+
+ if (irq < KVM_IOAPIC_NUM_PINS) {
+ irq_state = (unsigned long *)&kvm->arch.irq_states[irq];
- /* Logical OR for level trig interrupt */
- if (level)
- set_bit(irq_source_id, irq_state);
- else
- clear_bit(irq_source_id, irq_state);
+ /* Logical OR for level trig interrupt */
+ if (level)
+ set_bit(irq_source_id, irq_state);
+ else
+ clear_bit(irq_source_id, irq_state);
+ sig_level = !!(*irq_state);
+ } else /* Deal with MSI/MSI-X */
+ sig_level = 1;
/* Not possible to detect if the guest uses the PIC or the
* IOAPIC. So set the bit in both. The guest will ignore
* writes to the unused one.
*/
list_for_each_entry(e, &kvm->irq_routing, link)
- if (e->gsi == irq)
- e->set(e, kvm, !!(*irq_state));
+ if (e->gsi == irq) {
+ int r = e->set(e, kvm, sig_level);
+ if (r < 0)
+ continue;
+
+ ret = r + ((ret < 0) ? 0 : ret);
+ }
+ return ret;
}
-void kvm_notify_acked_irq(struct kvm *kvm, unsigned gsi)
+void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin)
{
+ struct kvm_kernel_irq_routing_entry *e;
struct kvm_irq_ack_notifier *kian;
struct hlist_node *n;
+ unsigned gsi = pin;
+
+ list_for_each_entry(e, &kvm->irq_routing, link)
+ if (e->irqchip.irqchip == irqchip &&
+ e->irqchip.pin == pin) {
+ gsi = e->gsi;
+ break;
+ }
hlist_for_each_entry(kian, n, &kvm->arch.irq_ack_notifier_list, link)
if (kian->gsi == gsi)
__kvm_free_irq_routing(&kvm->irq_routing);
}
-int setup_routing_entry(struct kvm_kernel_irq_routing_entry *e,
- const struct kvm_irq_routing_entry *ue)
+static int setup_routing_entry(struct kvm_kernel_irq_routing_entry *e,
+ const struct kvm_irq_routing_entry *ue)
{
int r = -EINVAL;
int delta;
e->set = kvm_set_pic_irq;
break;
case KVM_IRQCHIP_PIC_SLAVE:
- e->set = kvm_set_pic_irq;
+ e->set = kvm_set_pic_irq;
delta = 8;
break;
case KVM_IRQCHIP_IOAPIC:
e->irqchip.irqchip = ue->u.irqchip.irqchip;
e->irqchip.pin = ue->u.irqchip.pin + delta;
break;
+ case KVM_IRQ_ROUTING_MSI:
+ e->set = kvm_set_msi;
+ e->msi.address_lo = ue->u.msi.address_lo;
+ e->msi.address_hi = ue->u.msi.address_hi;
+ e->msi.data = ue->u.msi.data;
+ break;
default:
goto out;
}
#define ROUTING_ENTRY1(irq) IOAPIC_ROUTING_ENTRY(irq)
#ifdef CONFIG_X86
-#define SELECT_PIC(irq) \
- ((irq) < 8 ? KVM_IRQCHIP_PIC_MASTER : KVM_IRQCHIP_PIC_SLAVE)
# define PIC_ROUTING_ENTRY(irq) \
{ .gsi = irq, .type = KVM_IRQ_ROUTING_IRQCHIP, \
.u.irqchip.irqchip = SELECT_PIC(irq), .u.irqchip.pin = (irq) % 8 }
projects / linux-2.6-omap-h63xx.git / blobdiff