#define PAGE_SIZE 4096
-#define BALLOON_START_HCALL 0xba00 // size in rax
-#define BALLOON_QUERY_HCALL 0xba01 // req_pgs in rcx, alloc_pgs in rdx
struct balloon_config {
uint32_t requested_pages;
};
-static int virtio_free(struct vm_device * dev) {
- return -1;
-}
-static int virtio_reset(struct vm_device * dev) {
- struct virtio_balloon_state * virtio = (struct virtio_balloon_state *)dev->private_data;
+
+static int virtio_reset(struct virtio_balloon_state * virtio) {
memset(virtio->queue, 0, sizeof(struct virtio_queue) * 2);
}
-static int handle_kick(struct vm_device * dev) {
- struct virtio_balloon_state * virtio = (struct virtio_balloon_state *)dev->private_data;
+static int handle_kick(struct guest_info * core, struct virtio_balloon_state * virtio) {
struct virtio_queue * q = virtio->cur_queue;
- PrintDebug("VIRTIO BALLOON KICK: cur_index=%d (mod=%d), avail_index=%d\n",
+ PrintDebug(core->vm_info, core, "VIRTIO BALLOON KICK: cur_index=%d (mod=%d), avail_index=%d\n",
q->cur_avail_idx, q->cur_avail_idx % QUEUE_SIZE, q->avail->index);
while (q->cur_avail_idx < q->avail->index) {
uint32_t req_len = 0;
- PrintDebug("Descriptor Count=%d, index=%d\n", desc_cnt, q->cur_avail_idx % QUEUE_SIZE);
+ PrintDebug(core->vm_info, core, "Descriptor Count=%d, index=%d\n", desc_cnt, q->cur_avail_idx % QUEUE_SIZE);
for (i = 0; i < desc_cnt; i++) {
addr_t page_addr;
tmp_desc = &(q->desc[desc_idx]);
- PrintDebug("Header Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d\n", tmp_desc,
- (void *)(tmp_desc->addr_gpa), tmp_desc->length,
+ PrintDebug(core->vm_info, core, "Header Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d\n",
+ tmp_desc,
+ (void *)(addr_t)(tmp_desc->addr_gpa), tmp_desc->length,
tmp_desc->flags, tmp_desc->next);
- if (guest_pa_to_host_va(dev->vm, tmp_desc->addr_gpa, (addr_t *)&(page_addr)) == -1) {
- PrintError("Could not translate block header address\n");
+ if (v3_gpa_to_hva(core, tmp_desc->addr_gpa, (addr_t *)&(page_addr)) == -1) {
+ PrintError(core->vm_info, core, "Could not translate block header address\n");
return -1;
}
/*
- if (handle_balloon_op(dev, tmp_desc, buf_desc, status_desc) == -1) {
- PrintError("Error handling balloon operation\n");
+ if (handle_balloon_op(virtio, tmp_desc, buf_desc, status_desc) == -1) {
+ PrintError(core->vm_info, core, "Error handling balloon operation\n");
return -1;
}
*/
- PrintDebug("Guest Balloon Currently Ignored\n");
- PrintDebug("\t Requested=%d, Allocated=%d\n",
+ PrintDebug(core->vm_info, core, "Guest Balloon Currently Ignored\n");
+ PrintDebug(core->vm_info, core, "\t Requested=%d, Allocated=%d\n",
virtio->balloon_cfg.requested_pages,
virtio->balloon_cfg.allocated_pages);
}
if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
- PrintDebug("Raising IRQ %d\n", virtio->pci_dev->config_header.intr_line);
- v3_pci_raise_irq(virtio->pci_bus, 0, virtio->pci_dev);
+ PrintDebug(core->vm_info, core, "Raising IRQ %d\n", virtio->pci_dev->config_header.intr_line);
+ v3_pci_raise_irq(virtio->pci_bus, virtio->pci_dev, 0);
virtio->virtio_cfg.pci_isr = VIRTIO_ISR_ACTIVE;
}
return 0;
}
-static int virtio_io_write(uint16_t port, void * src, uint_t length, struct vm_device * dev) {
- struct virtio_balloon_state * virtio = (struct virtio_balloon_state *)dev->private_data;
+static int virtio_io_write(struct guest_info * core, uint16_t port, void * src, uint_t length, void * private_data) {
+ struct virtio_balloon_state * virtio = (struct virtio_balloon_state *)private_data;
int port_idx = port % virtio->io_range_size;
- PrintDebug("VIRTIO BALLOON Write for port %d (index=%d) len=%d, value=%x\n",
+ PrintDebug(core->vm_info, core, "VIRTIO BALLOON Write for port %d (index=%d) len=%d, value=%x\n",
port, port_idx, length, *(uint32_t *)src);
switch (port_idx) {
case GUEST_FEATURES_PORT:
if (length != 4) {
- PrintError("Illegal write length for guest features\n");
+ PrintError(core->vm_info, core, "Illegal write length for guest features\n");
return -1;
}
// round up to next page boundary.
virtio->cur_queue->ring_used_addr = (virtio->cur_queue->ring_used_addr + 0xfff) & ~0xfff;
- if (guest_pa_to_host_va(dev->vm, virtio->cur_queue->ring_desc_addr, (addr_t *)&(virtio->cur_queue->desc)) == -1) {
- PrintError("Could not translate ring descriptor address\n");
+ if (v3_gpa_to_hva(core, virtio->cur_queue->ring_desc_addr, (addr_t *)&(virtio->cur_queue->desc)) == -1) {
+ PrintError(core->vm_info, core, "Could not translate ring descriptor address\n");
return -1;
}
- if (guest_pa_to_host_va(dev->vm, virtio->cur_queue->ring_avail_addr, (addr_t *)&(virtio->cur_queue->avail)) == -1) {
- PrintError("Could not translate ring available address\n");
+ if (v3_gpa_to_hva(core, virtio->cur_queue->ring_avail_addr, (addr_t *)&(virtio->cur_queue->avail)) == -1) {
+ PrintError(core->vm_info, core, "Could not translate ring available address\n");
return -1;
}
- if (guest_pa_to_host_va(dev->vm, virtio->cur_queue->ring_used_addr, (addr_t *)&(virtio->cur_queue->used)) == -1) {
- PrintError("Could not translate ring used address\n");
+ if (v3_gpa_to_hva(core, virtio->cur_queue->ring_used_addr, (addr_t *)&(virtio->cur_queue->used)) == -1) {
+ PrintError(core->vm_info, core, "Could not translate ring used address\n");
return -1;
}
- PrintDebug("RingDesc_addr=%p, Avail_addr=%p, Used_addr=%p\n",
+ PrintDebug(core->vm_info, core, "RingDesc_addr=%p, Avail_addr=%p, Used_addr=%p\n",
(void *)(virtio->cur_queue->ring_desc_addr),
(void *)(virtio->cur_queue->ring_avail_addr),
(void *)(virtio->cur_queue->ring_used_addr));
- PrintDebug("RingDesc=%p, Avail=%p, Used=%p\n",
+ PrintDebug(core->vm_info, core, "RingDesc=%p, Avail=%p, Used=%p\n",
virtio->cur_queue->desc, virtio->cur_queue->avail, virtio->cur_queue->used);
} else {
- PrintError("Illegal write length for page frame number\n");
+ PrintError(core->vm_info, core, "Illegal write length for page frame number\n");
return -1;
}
break;
virtio->virtio_cfg.vring_queue_selector = *(uint16_t *)src;
if (virtio->virtio_cfg.vring_queue_selector > 1) {
- PrintError("Virtio Balloon device only uses 2 queue, selected %d\n",
+ PrintError(core->vm_info, core, "Virtio Balloon device only uses 2 queue, selected %d\n",
virtio->virtio_cfg.vring_queue_selector);
return -1;
}
break;
case VRING_Q_NOTIFY_PORT:
- PrintDebug("Handling Kick\n");
- if (handle_kick(dev) == -1) {
- PrintError("Could not handle Balloon Notification\n");
+ PrintDebug(core->vm_info, core, "Handling Kick\n");
+ if (handle_kick(core, virtio) == -1) {
+ PrintError(core->vm_info, core, "Could not handle Balloon Notification\n");
return -1;
}
break;
virtio->virtio_cfg.status = *(uint8_t *)src;
if (virtio->virtio_cfg.status == 0) {
- PrintDebug("Resetting device\n");
- virtio_reset(dev);
+ PrintDebug(core->vm_info, core, "Resetting device\n");
+ virtio_reset(virtio);
}
break;
}
-static int virtio_io_read(uint16_t port, void * dst, uint_t length, struct vm_device * dev) {
- struct virtio_balloon_state * virtio = (struct virtio_balloon_state *)dev->private_data;
+static int virtio_io_read(struct guest_info * core, uint16_t port, void * dst, uint_t length, void * private_data) {
+ struct virtio_balloon_state * virtio = (struct virtio_balloon_state *)private_data;
int port_idx = port % virtio->io_range_size;
- PrintDebug("VIRTIO BALLOON Read for port %d (index =%d), length=%d\n",
+ PrintDebug(core->vm_info, core, "VIRTIO BALLOON Read for port %d (index =%d), length=%d\n",
port, port_idx, length);
switch (port_idx) {
case HOST_FEATURES_PORT:
if (length != 4) {
- PrintError("Illegal read length for host features\n");
+ PrintError(core->vm_info, core, "Illegal read length for host features\n");
return -1;
}
break;
case VRING_PG_NUM_PORT:
if (length != 4) {
- PrintError("Illegal read length for page frame number\n");
+ PrintError(core->vm_info, core, "Illegal read length for page frame number\n");
return -1;
}
break;
case VRING_SIZE_PORT:
if (length != 2) {
- PrintError("Illegal read length for vring size\n");
+ PrintError(core->vm_info, core, "Illegal read length for vring size\n");
return -1;
}
case VIRTIO_STATUS_PORT:
if (length != 1) {
- PrintError("Illegal read length for status\n");
+ PrintError(core->vm_info, core, "Illegal read length for status\n");
return -1;
}
case VIRTIO_ISR_PORT:
*(uint8_t *)dst = virtio->virtio_cfg.pci_isr;
virtio->virtio_cfg.pci_isr = 0;
- v3_pci_lower_irq(virtio->pci_bus, 0, virtio->pci_dev);
+ v3_pci_lower_irq(virtio->pci_bus, virtio->pci_dev, 0);
break;
default:
memcpy(dst, cfg_ptr + cfg_offset, length);
} else {
- PrintError("Read of Unhandled Virtio Read\n");
+ PrintError(core->vm_info, core, "Read of Unhandled Virtio Read\n");
return -1;
}
}
+static int virtio_free(struct virtio_balloon_state * virtio) {
+
+ // unregister from PCI
+
+ V3_Free(virtio);
+ return 0;
+}
static struct v3_device_ops dev_ops = {
- .free = virtio_free,
- .reset = NULL,
- .start = NULL,
- .stop = NULL,
-};
+ .free = (int (*)(void *))virtio_free,
+};
-static int set_size(struct vm_device * dev, addr_t size) {
- struct virtio_balloon_state * virtio = (struct virtio_balloon_state *)dev->private_data;
+static int set_size(struct virtio_balloon_state * virtio, addr_t size) {
virtio->balloon_cfg.requested_pages = size / PAGE_SIZE; // number of pages
- PrintDebug("Requesting %d pages\n", virtio->balloon_cfg.requested_pages);
+ PrintDebug(VM_NONE, VCORE_NONE, "Requesting %d pages\n", virtio->balloon_cfg.requested_pages);
- v3_pci_raise_irq(virtio->pci_bus, 0, virtio->pci_dev);
+ v3_pci_raise_irq(virtio->pci_bus, virtio->pci_dev, 0);
virtio->virtio_cfg.pci_isr = VIRTIO_ISR_ACTIVE | VIRTIO_ISR_CFG_CHANGED;
return 0;
static int handle_hcall(struct guest_info * info, uint_t hcall_id, void * priv_data) {
- struct vm_device * dev = (struct vm_device *)priv_data;
+ struct virtio_balloon_state * virtio = (struct virtio_balloon_state *)priv_data;
int tgt_size = info->vm_regs.rcx;
- return set_size(dev, tgt_size);
+ return set_size(virtio, tgt_size);
}
static int handle_query_hcall(struct guest_info * info, uint_t hcall_id, void * priv_data) {
- struct vm_device * dev = (struct vm_device *)priv_data;
- struct virtio_balloon_state * virtio = (struct virtio_balloon_state *)dev->private_data;
+ struct virtio_balloon_state * virtio = (struct virtio_balloon_state *)priv_data;
info->vm_regs.rcx = virtio->balloon_cfg.requested_pages;
info->vm_regs.rdx = virtio->balloon_cfg.allocated_pages;
-static int virtio_init(struct guest_info * vm, void * cfg_data) {
- struct vm_device * pci_bus = v3_find_dev(vm, (char *)cfg_data);
+static int virtio_init(struct v3_vm_info * vm, v3_cfg_tree_t * cfg) {
+ struct vm_device * pci_bus = v3_find_dev(vm, v3_cfg_val(cfg, "bus"));
struct virtio_balloon_state * virtio_state = NULL;
struct pci_device * pci_dev = NULL;
+ char * dev_id = v3_cfg_val(cfg, "ID");
- PrintDebug("Initializing VIRTIO Balloon device\n");
+ PrintDebug(vm, VCORE_NONE, "Initializing VIRTIO Balloon device\n");
if (pci_bus == NULL) {
- PrintError("VirtIO devices require a PCI Bus");
+ PrintError(vm, VCORE_NONE, "VirtIO devices require a PCI Bus");
return -1;
}
- virtio_state = (struct virtio_balloon_state *)V3_Malloc(sizeof(struct virtio_balloon_state));
- memset(virtio_state, 0, sizeof(struct virtio_balloon_state));
-
+ virtio_state = (struct virtio_balloon_state *)V3_Malloc(sizeof(struct virtio_balloon_state));
- struct vm_device * dev = v3_allocate_device("LNX_VIRTIO_BALLOON", &dev_ops, virtio_state);
- if (v3_attach_device(vm, dev) == -1) {
- PrintError("Could not attach device %s\n", "LNX_VIRTIO_BALLOON");
+ if (!virtio_state) {
+ PrintError(vm, VCORE_NONE, "Cannot allocate in init\n");
return -1;
}
+ memset(virtio_state, 0, sizeof(struct virtio_balloon_state));
+ struct vm_device * dev = v3_add_device(vm, dev_id, &dev_ops, virtio_state);
+
+ if (dev == NULL) {
+ PrintError(vm, VCORE_NONE, "Could not attach device %s\n", dev_id);
+ V3_Free(virtio_state);
+ return -1;
+ }
// PCI initialization
{
bars[0].io_read = virtio_io_read;
bars[0].io_write = virtio_io_write;
+ bars[0].private_data = virtio_state;
+
pci_dev = v3_pci_register_device(pci_bus, PCI_STD_DEVICE,
0, PCI_AUTO_DEV_NUM, 0,
"LNX_VIRTIO_BALLOON", bars,
- NULL, NULL, NULL, dev);
+ NULL, NULL, NULL, NULL, virtio_state);
if (!pci_dev) {
- PrintError("Could not register PCI Device\n");
+ PrintError(vm, VCORE_NONE, "Could not register PCI Device\n");
+ v3_remove_device(dev);
return -1;
}
virtio_state->pci_bus = pci_bus;
}
- virtio_reset(dev);
+ virtio_reset(virtio_state);
- v3_register_hypercall(vm, BALLOON_START_HCALL, handle_hcall, dev);
- v3_register_hypercall(vm, BALLOON_QUERY_HCALL, handle_query_hcall, dev);
+ v3_register_hypercall(vm, BALLOON_START_HCALL, handle_hcall, virtio_state);
+ v3_register_hypercall(vm, BALLOON_QUERY_HCALL, handle_query_hcall, virtio_state);
return 0;
}
