static int vhost_client_migration_log(CPUPhysMemoryClient *client,
int enable)
{
struct vhost_dev *dev = container_of(client, struct vhost_dev, client);
int r;
if (!!enable == dev->log_enabled) {
return 0;
}
if (!dev->started) {
dev->log_enabled = enable;
return 0;
}
if (!enable) {
r = vhost_dev_set_log(dev, false);
if (r < 0) {
return r;
}
if (dev->log) {
qemu_free(dev->log);
}
dev->log = NULL;
dev->log_size = 0;
} else {
vhost_dev_log_resize(dev, vhost_get_log_size(dev));
r = vhost_dev_set_log(dev, true);
if (r < 0) {
return r;
}
}
dev->log_enabled = enable;
return 0;
}
static int vhost_migration_log(MemoryListener *listener, int enable)
{
struct vhost_dev *dev = container_of(listener, struct vhost_dev,
memory_listener);
int r;
if (!!enable == dev->log_enabled) {
return 0;
}
if (!dev->started) {
dev->log_enabled = enable;
return 0;
}
if (!enable) {
r = vhost_dev_set_log(dev, false);
if (r < 0) {
return r;
}
if (dev->log) {
g_free(dev->log);
}
dev->log = NULL;
dev->log_size = 0;
} else {
vhost_dev_log_resize(dev, vhost_get_log_size(dev));
r = vhost_dev_set_log(dev, true);
if (r < 0) {
return r;
}
}
dev->log_enabled = enable;
return 0;
}
static void vhost_client_set_memory(CPUPhysMemoryClient *client,
target_phys_addr_t start_addr,
ram_addr_t size,
ram_addr_t phys_offset)
{
struct vhost_dev *dev = container_of(client, struct vhost_dev, client);
ram_addr_t flags = phys_offset & ~TARGET_PAGE_MASK;
int s = offsetof(struct vhost_memory, regions) +
(dev->mem->nregions + 1) * sizeof dev->mem->regions[0];
uint64_t log_size;
int r;
dev->mem = qemu_realloc(dev->mem, s);
assert(size);
vhost_dev_unassign_memory(dev, start_addr, size);
if (flags == IO_MEM_RAM) {
/* Add given mapping, merging adjacent regions if any */
vhost_dev_assign_memory(dev, start_addr, size,
(uintptr_t)qemu_get_ram_ptr(phys_offset));
} else {
/* Remove old mapping for this memory, if any. */
vhost_dev_unassign_memory(dev, start_addr, size);
}
if (!dev->started) {
return;
}
if (dev->started) {
r = vhost_verify_ring_mappings(dev, start_addr, size);
assert(r >= 0);
}
if (!dev->log_enabled) {
r = ioctl(dev->control, VHOST_SET_MEM_TABLE, dev->mem);
assert(r >= 0);
return;
}
log_size = vhost_get_log_size(dev);
/* We allocate an extra 4K bytes to log,
* to reduce the * number of reallocations. */
#define VHOST_LOG_BUFFER (0x1000 / sizeof *dev->log)
/* To log more, must increase log size before table update. */
if (dev->log_size < log_size) {
vhost_dev_log_resize(dev, log_size + VHOST_LOG_BUFFER);
}
r = ioctl(dev->control, VHOST_SET_MEM_TABLE, dev->mem);
assert(r >= 0);
/* To log less, can only decrease log size after table update. */
if (dev->log_size > log_size + VHOST_LOG_BUFFER) {
vhost_dev_log_resize(dev, log_size);
}
}
int vhost_dev_start(struct vhost_dev *hdev, VirtIODevice *vdev)
{
int i, r;
r = vhost_dev_set_features(hdev, hdev->log_enabled);
if (r < 0) {
goto fail;
}
r = ioctl(hdev->control, VHOST_SET_MEM_TABLE, hdev->mem);
if (r < 0) {
r = -errno;
goto fail;
}
if (hdev->log_enabled) {
hdev->log_size = vhost_get_log_size(hdev);
hdev->log = hdev->log_size ?
qemu_mallocz(hdev->log_size * sizeof *hdev->log) : NULL;
r = ioctl(hdev->control, VHOST_SET_LOG_BASE,
(uint64_t)(unsigned long)hdev->log);
if (r < 0) {
r = -errno;
goto fail;
}
}
for (i = 0; i < hdev->nvqs; ++i) {
r = vhost_virtqueue_init(hdev,
vdev,
hdev->vqs + i,
i);
if (r < 0) {
goto fail_vq;
}
}
hdev->started = true;
return 0;
fail_vq:
while (--i >= 0) {
vhost_virtqueue_cleanup(hdev,
vdev,
hdev->vqs + i,
i);
}
fail:
return r;
}
int vhost_dev_start(struct vhost_dev *hdev, VirtIODevice *vdev)
{
int i, r;
if (!vdev->binding->set_guest_notifiers) {
fprintf(stderr, "binding does not support guest notifiers\n");
r = -ENOSYS;
goto fail;
}
r = vdev->binding->set_guest_notifiers(vdev->binding_opaque, true);
if (r < 0) {
fprintf(stderr, "Error binding guest notifier: %d\n", -r);
goto fail_notifiers;
}
r = vhost_dev_set_features(hdev, hdev->log_enabled);
if (r < 0) {
goto fail_features;
}
r = ioctl(hdev->control, VHOST_SET_MEM_TABLE, hdev->mem);
if (r < 0) {
r = -errno;
goto fail_mem;
}
for (i = 0; i < hdev->nvqs; ++i) {
r = vhost_virtqueue_init(hdev,
vdev,
hdev->vqs + i,
i);
if (r < 0) {
goto fail_vq;
}
}
if (hdev->log_enabled) {
hdev->log_size = vhost_get_log_size(hdev);
hdev->log = hdev->log_size ?
qemu_mallocz(hdev->log_size * sizeof *hdev->log) : NULL;
r = ioctl(hdev->control, VHOST_SET_LOG_BASE,
(uint64_t)(unsigned long)hdev->log);
if (r < 0) {
r = -errno;
goto fail_log;
}
}
hdev->started = true;
return 0;
fail_log:
fail_vq:
while (--i >= 0) {
vhost_virtqueue_cleanup(hdev,
vdev,
hdev->vqs + i,
i);
}
fail_mem:
fail_features:
vdev->binding->set_guest_notifiers(vdev->binding_opaque, false);
fail_notifiers:
fail:
return r;
}
static void vhost_client_set_memory(CPUPhysMemoryClient *client,
target_phys_addr_t start_addr,
ram_addr_t size,
ram_addr_t phys_offset)
{
struct vhost_dev *dev = container_of(client, struct vhost_dev, client);
ram_addr_t flags = phys_offset & ~TARGET_PAGE_MASK;
int s = offsetof(struct vhost_memory, regions) +
(dev->mem->nregions + 1) * sizeof dev->mem->regions[0];
uint64_t log_size;
int r;
/* TODO: this is a hack.
* At least one vga card (cirrus) changes the gpa to hva
* memory maps on data path, which slows us down.
* Since we should never need to DMA into VGA memory
* anyway, lets just skip these regions. */
if (ranges_overlap(start_addr, size, 0xa0000, 0x10000)) {
return;
}
dev->mem = qemu_realloc(dev->mem, s);
assert(size);
vhost_mem_unassign_memory(dev->mem, start_addr, size);
if (flags == IO_MEM_RAM) {
/* Add given mapping, merging adjacent regions if any */
vhost_mem_assign_memory(dev->mem, start_addr, size,
(uintptr_t)qemu_get_ram_ptr(phys_offset));
} else {
/* Remove old mapping for this memory, if any. */
vhost_mem_unassign_memory(dev->mem, start_addr, size);
}
if (!dev->started) {
return;
}
if (dev->started) {
r = vhost_verify_ring_mappings(dev, start_addr, size);
assert(r >= 0);
}
if (!dev->log_enabled) {
r = ioctl(dev->control, VHOST_SET_MEM_TABLE, dev->mem);
assert(r >= 0);
return;
}
log_size = vhost_get_log_size(dev);
/* We allocate an extra 4K bytes to log,
* to reduce the * number of reallocations. */
#define VHOST_LOG_BUFFER (0x1000 / sizeof *dev->log)
/* To log more, must increase log size before table update. */
if (dev->log_size < log_size) {
vhost_dev_log_resize(dev, log_size + VHOST_LOG_BUFFER);
}
r = ioctl(dev->control, VHOST_SET_MEM_TABLE, dev->mem);
assert(r >= 0);
/* To log less, can only decrease log size after table update. */
if (dev->log_size > log_size + VHOST_LOG_BUFFER) {
vhost_dev_log_resize(dev, log_size);
}
}
static void vhost_set_memory(MemoryListener *listener,
MemoryRegionSection *section,
bool add)
{
struct vhost_dev *dev = container_of(listener, struct vhost_dev,
memory_listener);
target_phys_addr_t start_addr = section->offset_within_address_space;
ram_addr_t size = section->size;
bool log_dirty = memory_region_is_logging(section->mr);
int s = offsetof(struct vhost_memory, regions) +
(dev->mem->nregions + 1) * sizeof dev->mem->regions[0];
uint64_t log_size;
int r;
void *ram;
dev->mem = g_realloc(dev->mem, s);
if (log_dirty) {
add = false;
}
assert(size);
/* Optimize no-change case. At least cirrus_vga does this a lot at this time. */
ram = memory_region_get_ram_ptr(section->mr) + section->offset_within_region;
if (add) {
if (!vhost_dev_cmp_memory(dev, start_addr, size, (uintptr_t)ram)) {
/* Region exists with same address. Nothing to do. */
return;
}
} else {
if (!vhost_dev_find_reg(dev, start_addr, size)) {
/* Removing region that we don't access. Nothing to do. */
return;
}
}
vhost_dev_unassign_memory(dev, start_addr, size);
if (add) {
/* Add given mapping, merging adjacent regions if any */
vhost_dev_assign_memory(dev, start_addr, size, (uintptr_t)ram);
} else {
/* Remove old mapping for this memory, if any. */
vhost_dev_unassign_memory(dev, start_addr, size);
}
if (!dev->started) {
return;
}
if (dev->started) {
r = vhost_verify_ring_mappings(dev, start_addr, size);
assert(r >= 0);
}
if (!dev->log_enabled) {
r = ioctl(dev->control, VHOST_SET_MEM_TABLE, dev->mem);
assert(r >= 0);
return;
}
log_size = vhost_get_log_size(dev);
/* We allocate an extra 4K bytes to log,
* to reduce the * number of reallocations. */
#define VHOST_LOG_BUFFER (0x1000 / sizeof *dev->log)
/* To log more, must increase log size before table update. */
if (dev->log_size < log_size) {
vhost_dev_log_resize(dev, log_size + VHOST_LOG_BUFFER);
}
r = ioctl(dev->control, VHOST_SET_MEM_TABLE, dev->mem);
assert(r >= 0);
/* To log less, can only decrease log size after table update. */
if (dev->log_size > log_size + VHOST_LOG_BUFFER) {
vhost_dev_log_resize(dev, log_size);
}
}