vdpa: move memory listener to vhost_vdpa_shared
Next patches will register the vhost_vdpa memory listener while the VM
is migrating at the destination, so we can map the memory to the device
before stopping the VM at the source. The main goal is to reduce the
downtime.
However, the destination QEMU is unaware of which vhost_vdpa device will
register its memory_listener. If the source guest has CVQ enabled, it
will be the CVQ device. Otherwise, it will be the first one.
Move the memory listener to a common place rather than always in the
first / last vhost_vdpa.
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20231221174322.3130442-14-eperezma@redhat.com>
Tested-by: Lei Yang <leiyang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c
index e6276fb..ddae494 100644
--- a/hw/virtio/vhost-vdpa.c
+++ b/hw/virtio/vhost-vdpa.c
@@ -170,28 +170,28 @@
static void vhost_vdpa_listener_commit(MemoryListener *listener)
{
- struct vhost_vdpa *v = container_of(listener, struct vhost_vdpa, listener);
+ VhostVDPAShared *s = container_of(listener, VhostVDPAShared, listener);
struct vhost_msg_v2 msg = {};
- int fd = v->shared->device_fd;
+ int fd = s->device_fd;
- if (!(v->shared->backend_cap & (0x1ULL << VHOST_BACKEND_F_IOTLB_BATCH))) {
+ if (!(s->backend_cap & (0x1ULL << VHOST_BACKEND_F_IOTLB_BATCH))) {
return;
}
- if (!v->shared->iotlb_batch_begin_sent) {
+ if (!s->iotlb_batch_begin_sent) {
return;
}
msg.type = VHOST_IOTLB_MSG_V2;
msg.iotlb.type = VHOST_IOTLB_BATCH_END;
- trace_vhost_vdpa_listener_commit(v->shared, fd, msg.type, msg.iotlb.type);
+ trace_vhost_vdpa_listener_commit(s, fd, msg.type, msg.iotlb.type);
if (write(fd, &msg, sizeof(msg)) != sizeof(msg)) {
error_report("failed to write, fd=%d, errno=%d (%s)",
fd, errno, strerror(errno));
}
- v->shared->iotlb_batch_begin_sent = false;
+ s->iotlb_batch_begin_sent = false;
}
static void vhost_vdpa_iommu_map_notify(IOMMUNotifier *n, IOMMUTLBEntry *iotlb)
@@ -246,7 +246,7 @@
static void vhost_vdpa_iommu_region_add(MemoryListener *listener,
MemoryRegionSection *section)
{
- struct vhost_vdpa *v = container_of(listener, struct vhost_vdpa, listener);
+ VhostVDPAShared *s = container_of(listener, VhostVDPAShared, listener);
struct vdpa_iommu *iommu;
Int128 end;
@@ -270,7 +270,7 @@
iommu_idx);
iommu->iommu_offset = section->offset_within_address_space -
section->offset_within_region;
- iommu->dev_shared = v->shared;
+ iommu->dev_shared = s;
ret = memory_region_register_iommu_notifier(section->mr, &iommu->n, NULL);
if (ret) {
@@ -278,7 +278,7 @@
return;
}
- QLIST_INSERT_HEAD(&v->shared->iommu_list, iommu, iommu_next);
+ QLIST_INSERT_HEAD(&s->iommu_list, iommu, iommu_next);
memory_region_iommu_replay(iommu->iommu_mr, &iommu->n);
return;
@@ -287,11 +287,11 @@
static void vhost_vdpa_iommu_region_del(MemoryListener *listener,
MemoryRegionSection *section)
{
- struct vhost_vdpa *v = container_of(listener, struct vhost_vdpa, listener);
+ VhostVDPAShared *s = container_of(listener, VhostVDPAShared, listener);
struct vdpa_iommu *iommu;
- QLIST_FOREACH(iommu, &v->shared->iommu_list, iommu_next)
+ QLIST_FOREACH(iommu, &s->iommu_list, iommu_next)
{
if (MEMORY_REGION(iommu->iommu_mr) == section->mr &&
iommu->n.start == section->offset_within_region) {
@@ -307,7 +307,7 @@
MemoryRegionSection *section)
{
DMAMap mem_region = {};
- struct vhost_vdpa *v = container_of(listener, struct vhost_vdpa, listener);
+ VhostVDPAShared *s = container_of(listener, VhostVDPAShared, listener);
hwaddr iova;
Int128 llend, llsize;
void *vaddr;
@@ -315,10 +315,8 @@
int page_size = qemu_target_page_size();
int page_mask = -page_size;
- if (vhost_vdpa_listener_skipped_section(section,
- v->shared->iova_range.first,
- v->shared->iova_range.last,
- page_mask)) {
+ if (vhost_vdpa_listener_skipped_section(section, s->iova_range.first,
+ s->iova_range.last, page_mask)) {
return;
}
if (memory_region_is_iommu(section->mr)) {
@@ -328,8 +326,7 @@
if (unlikely((section->offset_within_address_space & ~page_mask) !=
(section->offset_within_region & ~page_mask))) {
- trace_vhost_vdpa_listener_region_add_unaligned(v->shared,
- section->mr->name,
+ trace_vhost_vdpa_listener_region_add_unaligned(s, section->mr->name,
section->offset_within_address_space & ~page_mask,
section->offset_within_region & ~page_mask);
return;
@@ -349,18 +346,18 @@
section->offset_within_region +
(iova - section->offset_within_address_space);
- trace_vhost_vdpa_listener_region_add(v->shared, iova, int128_get64(llend),
+ trace_vhost_vdpa_listener_region_add(s, iova, int128_get64(llend),
vaddr, section->readonly);
llsize = int128_sub(llend, int128_make64(iova));
- if (v->shared->shadow_data) {
+ if (s->shadow_data) {
int r;
mem_region.translated_addr = (hwaddr)(uintptr_t)vaddr,
mem_region.size = int128_get64(llsize) - 1,
mem_region.perm = IOMMU_ACCESS_FLAG(true, section->readonly),
- r = vhost_iova_tree_map_alloc(v->shared->iova_tree, &mem_region);
+ r = vhost_iova_tree_map_alloc(s->iova_tree, &mem_region);
if (unlikely(r != IOVA_OK)) {
error_report("Can't allocate a mapping (%d)", r);
goto fail;
@@ -369,8 +366,8 @@
iova = mem_region.iova;
}
- vhost_vdpa_iotlb_batch_begin_once(v->shared);
- ret = vhost_vdpa_dma_map(v->shared, VHOST_VDPA_GUEST_PA_ASID, iova,
+ vhost_vdpa_iotlb_batch_begin_once(s);
+ ret = vhost_vdpa_dma_map(s, VHOST_VDPA_GUEST_PA_ASID, iova,
int128_get64(llsize), vaddr, section->readonly);
if (ret) {
error_report("vhost vdpa map fail!");
@@ -380,8 +377,8 @@
return;
fail_map:
- if (v->shared->shadow_data) {
- vhost_iova_tree_remove(v->shared->iova_tree, mem_region);
+ if (s->shadow_data) {
+ vhost_iova_tree_remove(s->iova_tree, mem_region);
}
fail:
@@ -398,17 +395,15 @@
static void vhost_vdpa_listener_region_del(MemoryListener *listener,
MemoryRegionSection *section)
{
- struct vhost_vdpa *v = container_of(listener, struct vhost_vdpa, listener);
+ VhostVDPAShared *s = container_of(listener, VhostVDPAShared, listener);
hwaddr iova;
Int128 llend, llsize;
int ret;
int page_size = qemu_target_page_size();
int page_mask = -page_size;
- if (vhost_vdpa_listener_skipped_section(section,
- v->shared->iova_range.first,
- v->shared->iova_range.last,
- page_mask)) {
+ if (vhost_vdpa_listener_skipped_section(section, s->iova_range.first,
+ s->iova_range.last, page_mask)) {
return;
}
if (memory_region_is_iommu(section->mr)) {
@@ -417,8 +412,7 @@
if (unlikely((section->offset_within_address_space & ~page_mask) !=
(section->offset_within_region & ~page_mask))) {
- trace_vhost_vdpa_listener_region_del_unaligned(v->shared,
- section->mr->name,
+ trace_vhost_vdpa_listener_region_del_unaligned(s, section->mr->name,
section->offset_within_address_space & ~page_mask,
section->offset_within_region & ~page_mask);
return;
@@ -427,7 +421,7 @@
iova = ROUND_UP(section->offset_within_address_space, page_size);
llend = vhost_vdpa_section_end(section, page_mask);
- trace_vhost_vdpa_listener_region_del(v->shared, iova,
+ trace_vhost_vdpa_listener_region_del(s, iova,
int128_get64(int128_sub(llend, int128_one())));
if (int128_ge(int128_make64(iova), llend)) {
@@ -436,7 +430,7 @@
llsize = int128_sub(llend, int128_make64(iova));
- if (v->shared->shadow_data) {
+ if (s->shadow_data) {
const DMAMap *result;
const void *vaddr = memory_region_get_ram_ptr(section->mr) +
section->offset_within_region +
@@ -446,37 +440,37 @@
.size = int128_get64(llsize) - 1,
};
- result = vhost_iova_tree_find_iova(v->shared->iova_tree, &mem_region);
+ result = vhost_iova_tree_find_iova(s->iova_tree, &mem_region);
if (!result) {
/* The memory listener map wasn't mapped */
return;
}
iova = result->iova;
- vhost_iova_tree_remove(v->shared->iova_tree, *result);
+ vhost_iova_tree_remove(s->iova_tree, *result);
}
- vhost_vdpa_iotlb_batch_begin_once(v->shared);
+ vhost_vdpa_iotlb_batch_begin_once(s);
/*
* The unmap ioctl doesn't accept a full 64-bit. need to check it
*/
if (int128_eq(llsize, int128_2_64())) {
llsize = int128_rshift(llsize, 1);
- ret = vhost_vdpa_dma_unmap(v->shared, VHOST_VDPA_GUEST_PA_ASID, iova,
+ ret = vhost_vdpa_dma_unmap(s, VHOST_VDPA_GUEST_PA_ASID, iova,
int128_get64(llsize));
if (ret) {
error_report("vhost_vdpa_dma_unmap(%p, 0x%" HWADDR_PRIx ", "
"0x%" HWADDR_PRIx ") = %d (%m)",
- v, iova, int128_get64(llsize), ret);
+ s, iova, int128_get64(llsize), ret);
}
iova += int128_get64(llsize);
}
- ret = vhost_vdpa_dma_unmap(v->shared, VHOST_VDPA_GUEST_PA_ASID, iova,
+ ret = vhost_vdpa_dma_unmap(s, VHOST_VDPA_GUEST_PA_ASID, iova,
int128_get64(llsize));
if (ret) {
error_report("vhost_vdpa_dma_unmap(%p, 0x%" HWADDR_PRIx ", "
"0x%" HWADDR_PRIx ") = %d (%m)",
- v, iova, int128_get64(llsize), ret);
+ s, iova, int128_get64(llsize), ret);
}
memory_region_unref(section->mr);
@@ -595,7 +589,7 @@
v->dev = dev;
dev->opaque = opaque ;
- v->listener = vhost_vdpa_memory_listener;
+ v->shared->listener = vhost_vdpa_memory_listener;
vhost_vdpa_init_svq(dev, v);
error_propagate(&dev->migration_blocker, v->migration_blocker);
@@ -755,10 +749,10 @@
trace_vhost_vdpa_cleanup(dev, v);
if (vhost_vdpa_first_dev(dev)) {
ram_block_discard_disable(false);
+ memory_listener_unregister(&v->shared->listener);
}
vhost_vdpa_host_notifiers_uninit(dev, dev->nvqs);
- memory_listener_unregister(&v->listener);
vhost_vdpa_svq_cleanup(dev);
dev->opaque = NULL;
@@ -1331,7 +1325,7 @@
"IOMMU and try again");
return -1;
}
- memory_listener_register(&v->listener, dev->vdev->dma_as);
+ memory_listener_register(&v->shared->listener, dev->vdev->dma_as);
return vhost_vdpa_add_status(dev, VIRTIO_CONFIG_S_DRIVER_OK);
}
@@ -1350,7 +1344,7 @@
vhost_vdpa_reset_device(dev);
vhost_vdpa_add_status(dev, VIRTIO_CONFIG_S_ACKNOWLEDGE |
VIRTIO_CONFIG_S_DRIVER);
- memory_listener_unregister(&v->listener);
+ memory_listener_unregister(&v->shared->listener);
}
static int vhost_vdpa_set_log_base(struct vhost_dev *dev, uint64_t base,
diff --git a/include/hw/virtio/vhost-vdpa.h b/include/hw/virtio/vhost-vdpa.h
index 2abee21..8f54e5e 100644
--- a/include/hw/virtio/vhost-vdpa.h
+++ b/include/hw/virtio/vhost-vdpa.h
@@ -33,6 +33,7 @@
/* Info shared by all vhost_vdpa device models */
typedef struct vhost_vdpa_shared {
int device_fd;
+ MemoryListener listener;
struct vhost_vdpa_iova_range iova_range;
QLIST_HEAD(, vdpa_iommu) iommu_list;
@@ -51,7 +52,6 @@
typedef struct vhost_vdpa {
int index;
uint32_t address_space_id;
- MemoryListener listener;
uint64_t acked_features;
bool shadow_vqs_enabled;
/* Device suspended successfully */
