static void ivshmem_receive(void *opaque, const uint8_t *buf, int size)
{
IVShmemState *s = opaque;
ivshmem_IntrStatus_write(s, *buf);
IVSHMEM_DPRINTF("ivshmem_receive 0x%02x\n", *buf);
}
static void ivshmem_io_writel(void *opaque, target_phys_addr_t addr,
uint32_t val)
{
IVShmemState *s = opaque;
uint64_t write_one = 1;
uint16_t dest = val >> 16;
uint16_t vector = val & 0xff;
addr &= 0xfc;
IVSHMEM_DPRINTF("writing to addr " TARGET_FMT_plx "\n", addr);
switch (addr)
{
case INTRMASK:
ivshmem_IntrMask_write(s, val);
break;
case INTRSTATUS:
ivshmem_IntrStatus_write(s, val);
break;
case DOORBELL:
/* check that dest VM ID is reasonable */
if ((dest < 0) || (dest > s->max_peer)) {
IVSHMEM_DPRINTF("Invalid destination VM ID (%d)\n", dest);
break;
}
/* check doorbell range */
if ((vector >= 0) && (vector < s->peers[dest].nb_eventfds)) {
IVSHMEM_DPRINTF("Writing %" PRId64 " to VM %d on vector %d\n",
write_one, dest, vector);
if (write(s->peers[dest].eventfds[vector],
&(write_one), 8) != 8) {
IVSHMEM_DPRINTF("error writing to eventfd\n");
}
}
break;
default:
IVSHMEM_DPRINTF("Invalid VM Doorbell VM %d\n", dest);
}
}
static void ivshmem_vector_notify(void *opaque)
{
MSIVector *entry = opaque;
PCIDevice *pdev = entry->pdev;
IVShmemState *s = IVSHMEM(pdev);
int vector = entry - s->msi_vectors;
EventNotifier *n = &s->peers[s->vm_id].eventfds[vector];
if (!event_notifier_test_and_clear(n)) {
return;
}
IVSHMEM_DPRINTF("interrupt on vector %p %d\n", pdev, vector);
if (ivshmem_has_feature(s, IVSHMEM_MSI)) {
msix_notify(pdev, vector);
} else {
ivshmem_IntrStatus_write(s, 1);
}
}
static void ivshmem_io_write(void *opaque, hwaddr addr,
uint64_t val, unsigned size)
{
IVShmemState *s = opaque;
uint16_t dest = val >> 16;
uint16_t vector = val & 0xff;
addr &= 0xfc;
IVSHMEM_DPRINTF("writing to addr " TARGET_FMT_plx "\n", addr);
switch (addr)
{
case INTRMASK:
ivshmem_IntrMask_write(s, val);
break;
case INTRSTATUS:
ivshmem_IntrStatus_write(s, val);
break;
case DOORBELL:
/* check that dest VM ID is reasonable */
if (dest >= s->nb_peers) {
IVSHMEM_DPRINTF("Invalid destination VM ID (%d)\n", dest);
break;
}
/* check doorbell range */
if (vector < s->peers[dest].nb_eventfds) {
IVSHMEM_DPRINTF("Notifying VM %d on vector %d\n", dest, vector);
event_notifier_set(&s->peers[dest].eventfds[vector]);
} else {
IVSHMEM_DPRINTF("Invalid destination vector %d on VM %d\n",
vector, dest);
}
break;
default:
IVSHMEM_DPRINTF("Unhandled write " TARGET_FMT_plx "\n", addr);
}
}
