#include <asm/processor.h>
#include <asm/page.h>
#include <asm/current.h>
+#include <trace/events/kvm.h>
#include "ioapic.h"
#include "lapic.h"
if (injected && pent->fields.trig_mode == IOAPIC_LEVEL_TRIG)
pent->fields.remote_irr = 1;
}
- if (!pent->fields.trig_mode)
- ioapic->irr &= ~(1 << idx);
return injected;
}
{
unsigned index;
bool mask_before, mask_after;
+ union kvm_ioapic_redirect_entry *e;
switch (ioapic->ioregsel) {
case IOAPIC_REG_VERSION:
ioapic_debug("change redir index %x val %x\n", index, val);
if (index >= IOAPIC_NUM_PINS)
return;
- mask_before = ioapic->redirtbl[index].fields.mask;
+ e = &ioapic->redirtbl[index];
+ mask_before = e->fields.mask;
if (ioapic->ioregsel & 1) {
- ioapic->redirtbl[index].bits &= 0xffffffff;
- ioapic->redirtbl[index].bits |= (u64) val << 32;
+ e->bits &= 0xffffffff;
+ e->bits |= (u64) val << 32;
} else {
- ioapic->redirtbl[index].bits &= ~0xffffffffULL;
- ioapic->redirtbl[index].bits |= (u32) val;
- ioapic->redirtbl[index].fields.remote_irr = 0;
+ e->bits &= ~0xffffffffULL;
+ e->bits |= (u32) val;
+ e->fields.remote_irr = 0;
}
- mask_after = ioapic->redirtbl[index].fields.mask;
+ mask_after = e->fields.mask;
if (mask_before != mask_after)
kvm_fire_mask_notifiers(ioapic->kvm, index, mask_after);
- if (ioapic->irr & (1 << index))
+ if (e->fields.trig_mode == IOAPIC_LEVEL_TRIG
+ && ioapic->irr & (1 << index))
ioapic_service(ioapic, index);
break;
}
}
-int ioapic_deliver_entry(struct kvm *kvm, union kvm_ioapic_redirect_entry *e)
-{
- DECLARE_BITMAP(deliver_bitmask, KVM_MAX_VCPUS);
- int i, r = -1;
-
- kvm_get_intr_delivery_bitmask(kvm, NULL, e->fields.dest_id,
- e->fields.dest_mode,
- e->fields.delivery_mode == IOAPIC_LOWEST_PRIORITY,
- 0, deliver_bitmask);
-
- if (find_first_bit(deliver_bitmask, KVM_MAX_VCPUS) >= KVM_MAX_VCPUS) {
- ioapic_debug("no target on destination\n");
- return r;
- }
-
- while ((i = find_first_bit(deliver_bitmask, KVM_MAX_VCPUS))
- < KVM_MAX_VCPUS) {
- struct kvm_vcpu *vcpu = kvm->vcpus[i];
- __clear_bit(i, deliver_bitmask);
- if (vcpu) {
- if (r < 0)
- r = 0;
- r += kvm_apic_set_irq(vcpu, e->fields.vector,
- e->fields.delivery_mode,
- e->fields.trig_mode);
- } else
- ioapic_debug("null destination vcpu: "
- "mask=%x vector=%x delivery_mode=%x\n",
- e->fields.deliver_bitmask,
- e->fields.vector, e->fields.delivery_mode);
- }
- return r;
-}
-
static int ioapic_deliver(struct kvm_ioapic *ioapic, int irq)
{
- union kvm_ioapic_redirect_entry entry = ioapic->redirtbl[irq];
+ union kvm_ioapic_redirect_entry *entry = &ioapic->redirtbl[irq];
+ struct kvm_lapic_irq irqe;
ioapic_debug("dest=%x dest_mode=%x delivery_mode=%x "
"vector=%x trig_mode=%x\n",
- entry.fields.dest, entry.fields.dest_mode,
- entry.fields.delivery_mode, entry.fields.vector,
- entry.fields.trig_mode);
+ entry->fields.dest, entry->fields.dest_mode,
+ entry->fields.delivery_mode, entry->fields.vector,
+ entry->fields.trig_mode);
+
+ irqe.dest_id = entry->fields.dest_id;
+ irqe.vector = entry->fields.vector;
+ irqe.dest_mode = entry->fields.dest_mode;
+ irqe.trig_mode = entry->fields.trig_mode;
+ irqe.delivery_mode = entry->fields.delivery_mode << 8;
+ irqe.level = 1;
+ irqe.shorthand = 0;
#ifdef CONFIG_X86
/* Always delivery PIT interrupt to vcpu 0 */
if (irq == 0) {
- entry.fields.dest_mode = 0; /* Physical mode. */
- entry.fields.dest_id = ioapic->kvm->vcpus[0]->vcpu_id;
+ irqe.dest_mode = 0; /* Physical mode. */
+ /* need to read apic_id from apic regiest since
+ * it can be rewritten */
+ irqe.dest_id = ioapic->kvm->bsp_vcpu->vcpu_id;
}
#endif
- return ioapic_deliver_entry(ioapic->kvm, &entry);
+ return kvm_irq_delivery_to_apic(ioapic->kvm, NULL, &irqe);
}
int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int level)
if (!level)
ioapic->irr &= ~mask;
else {
+ int edge = (entry.fields.trig_mode == IOAPIC_EDGE_TRIG);
ioapic->irr |= mask;
- if ((!entry.fields.trig_mode && old_irr != ioapic->irr)
- || !entry.fields.remote_irr)
+ if ((edge && old_irr != ioapic->irr) ||
+ (!edge && !entry.fields.remote_irr))
ret = ioapic_service(ioapic, irq);
+ else
+ ret = 0; /* report coalesced interrupt */
}
+ trace_kvm_ioapic_set_irq(entry.bits, irq, ret == 0);
}
return ret;
}
__kvm_ioapic_update_eoi(ioapic, i, trigger_mode);
}
-static int ioapic_in_range(struct kvm_io_device *this, gpa_t addr,
- int len, int is_write)
+static inline struct kvm_ioapic *to_ioapic(struct kvm_io_device *dev)
{
- struct kvm_ioapic *ioapic = (struct kvm_ioapic *)this->private;
+ return container_of(dev, struct kvm_ioapic, dev);
+}
+static inline int ioapic_in_range(struct kvm_ioapic *ioapic, gpa_t addr)
+{
return ((addr >= ioapic->base_address &&
(addr < ioapic->base_address + IOAPIC_MEM_LENGTH)));
}
-static void ioapic_mmio_read(struct kvm_io_device *this, gpa_t addr, int len,
- void *val)
+static int ioapic_mmio_read(struct kvm_io_device *this, gpa_t addr, int len,
+ void *val)
{
- struct kvm_ioapic *ioapic = (struct kvm_ioapic *)this->private;
+ struct kvm_ioapic *ioapic = to_ioapic(this);
u32 result;
+ if (!ioapic_in_range(ioapic, addr))
+ return -EOPNOTSUPP;
ioapic_debug("addr %lx\n", (unsigned long)addr);
ASSERT(!(addr & 0xf)); /* check alignment */
+ mutex_lock(&ioapic->kvm->irq_lock);
addr &= 0xff;
switch (addr) {
case IOAPIC_REG_SELECT:
default:
printk(KERN_WARNING "ioapic: wrong length %d\n", len);
}
+ mutex_unlock(&ioapic->kvm->irq_lock);
+ return 0;
}
-static void ioapic_mmio_write(struct kvm_io_device *this, gpa_t addr, int len,
- const void *val)
+static int ioapic_mmio_write(struct kvm_io_device *this, gpa_t addr, int len,
+ const void *val)
{
- struct kvm_ioapic *ioapic = (struct kvm_ioapic *)this->private;
+ struct kvm_ioapic *ioapic = to_ioapic(this);
u32 data;
+ if (!ioapic_in_range(ioapic, addr))
+ return -EOPNOTSUPP;
ioapic_debug("ioapic_mmio_write addr=%p len=%d val=%p\n",
(void*)addr, len, val);
ASSERT(!(addr & 0xf)); /* check alignment */
+
+ mutex_lock(&ioapic->kvm->irq_lock);
if (len == 4 || len == 8)
data = *(u32 *) val;
else {
printk(KERN_WARNING "ioapic: Unsupported size %d\n", len);
- return;
+ goto unlock;
}
addr &= 0xff;
default:
break;
}
+unlock:
+ mutex_unlock(&ioapic->kvm->irq_lock);
+ return 0;
}
void kvm_ioapic_reset(struct kvm_ioapic *ioapic)
ioapic->id = 0;
}
+static const struct kvm_io_device_ops ioapic_mmio_ops = {
+ .read = ioapic_mmio_read,
+ .write = ioapic_mmio_write,
+};
+
int kvm_ioapic_init(struct kvm *kvm)
{
struct kvm_ioapic *ioapic;
+ int ret;
ioapic = kzalloc(sizeof(struct kvm_ioapic), GFP_KERNEL);
if (!ioapic)
return -ENOMEM;
kvm->arch.vioapic = ioapic;
kvm_ioapic_reset(ioapic);
- ioapic->dev.read = ioapic_mmio_read;
- ioapic->dev.write = ioapic_mmio_write;
- ioapic->dev.in_range = ioapic_in_range;
- ioapic->dev.private = ioapic;
+ kvm_iodevice_init(&ioapic->dev, &ioapic_mmio_ops);
ioapic->kvm = kvm;
- kvm_io_bus_register_dev(&kvm->mmio_bus, &ioapic->dev);
- return 0;
+ ret = kvm_io_bus_register_dev(kvm, &kvm->mmio_bus, &ioapic->dev);
+ if (ret < 0)
+ kfree(ioapic);
+
+ return ret;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff