@@ -29,6 +29,7 @@
#include "hw/vfio/vfio.h"
#include "exec/address-spaces.h"
#include "exec/memory.h"
+#include "exec/ram_addr.h"
#include "hw/hw.h"
#include "qemu/error-report.h"
#include "qemu/main-loop.h"
@@ -37,6 +38,7 @@
#include "sysemu/reset.h"
#include "trace.h"
#include "qapi/error.h"
+#include "migration/migration.h"
VFIOGroupList vfio_group_list =
QLIST_HEAD_INITIALIZER(vfio_group_list);
@@ -287,6 +289,39 @@ const MemoryRegionOps vfio_region_ops = {
};
/*
+ * Device state interfaces
+ */
+
+static bool vfio_devices_all_stopped_and_saving(VFIOContainer *container)
+{
+ VFIOGroup *group;
+ VFIODevice *vbasedev;
+ MigrationState *ms = migrate_get_current();
+
+ if (!migration_is_setup_or_active(ms->state)) {
+ return false;
+ }
+
+ QLIST_FOREACH(group, &container->group_list, container_next) {
+ QLIST_FOREACH(vbasedev, &group->device_list, next) {
+ VFIOMigration *migration = vbasedev->migration;
+
+ if (!migration) {
+ return false;
+ }
+
+ if ((migration->device_state & VFIO_DEVICE_STATE_SAVING) &&
+ !(migration->device_state & VFIO_DEVICE_STATE_RUNNING)) {
+ continue;
+ } else {
+ return false;
+ }
+ }
+ }
+ return true;
+}
+
+/*
* DMA - Mapping and unmapping for the "type1" IOMMU interface used on x86
*/
static int vfio_dma_unmap(VFIOContainer *container,
@@ -812,9 +847,90 @@ static void vfio_listener_region_del(MemoryListener *listener,
}
}
+static int vfio_get_dirty_bitmap(VFIOContainer *container, uint64_t iova,
+ uint64_t size, ram_addr_t ram_addr)
+{
+ struct vfio_iommu_type1_dirty_bitmap *dbitmap;
+ struct vfio_iommu_type1_dirty_bitmap_get *range;
+ uint64_t pages;
+ int ret;
+
+ dbitmap = g_malloc0(sizeof(*dbitmap) + sizeof(*range));
+
+ dbitmap->argsz = sizeof(*dbitmap) + sizeof(*range);
+ dbitmap->flags = VFIO_IOMMU_DIRTY_PAGES_FLAG_GET_BITMAP;
+ range = (struct vfio_iommu_type1_dirty_bitmap_get *)&dbitmap->data;
+ range->iova = iova;
+ range->size = size;
+
+ /*
+ * cpu_physical_memory_set_dirty_lebitmap() expects pages in bitmap of
+ * TARGET_PAGE_SIZE to mark those dirty. Hence set bitmap's pgsize to
+ * TARGET_PAGE_SIZE.
+ */
+ range->bitmap.pgsize = TARGET_PAGE_SIZE;
+
+ pages = TARGET_PAGE_ALIGN(range->size) >> TARGET_PAGE_BITS;
+ range->bitmap.size = ROUND_UP(pages, sizeof(__u64) * BITS_PER_BYTE) /
+ BITS_PER_BYTE;
+ range->bitmap.data = g_try_malloc0(range->bitmap.size);
+ if (!range->bitmap.data) {
+ ret = -ENOMEM;
+ goto err_out;
+ }
+
+ ret = ioctl(container->fd, VFIO_IOMMU_DIRTY_PAGES, dbitmap);
+ if (ret) {
+ error_report("Failed to get dirty bitmap for iova: 0x%llx "
+ "size: 0x%llx err: %d",
+ range->iova, range->size, errno);
+ goto err_out;
+ }
+
+ cpu_physical_memory_set_dirty_lebitmap((uint64_t *)range->bitmap.data,
+ ram_addr, pages);
+
+ trace_vfio_get_dirty_bitmap(container->fd, range->iova, range->size,
+ range->bitmap.size, ram_addr);
+err_out:
+ g_free(range->bitmap.data);
+ g_free(dbitmap);
+
+ return ret;
+}
+
+static int vfio_sync_dirty_bitmap(VFIOContainer *container,
+ MemoryRegionSection *section)
+{
+ ram_addr_t ram_addr;
+
+ ram_addr = memory_region_get_ram_addr(section->mr) +
+ section->offset_within_region;
+
+ return vfio_get_dirty_bitmap(container,
+ TARGET_PAGE_ALIGN(section->offset_within_address_space),
+ int128_get64(section->size), ram_addr);
+}
+
+static void vfio_listerner_log_sync(MemoryListener *listener,
+ MemoryRegionSection *section)
+{
+ VFIOContainer *container = container_of(listener, VFIOContainer, listener);
+
+ if (vfio_listener_skipped_section(section) ||
+ !container->dirty_pages_supported) {
+ return;
+ }
+
+ if (vfio_devices_all_stopped_and_saving(container)) {
+ vfio_sync_dirty_bitmap(container, section);
+ }
+}
+
static const MemoryListener vfio_memory_listener = {
.region_add = vfio_listener_region_add,
.region_del = vfio_listener_region_del,
+ .log_sync = vfio_listerner_log_sync,
};
static void vfio_listener_release(VFIOContainer *container)
@@ -163,3 +163,4 @@ vfio_load_device_config_state(const char *name) " (%s)"
vfio_load_state(const char *name, uint64_t data) " (%s) data 0x%"PRIx64
vfio_load_state_device_data(const char *name, uint64_t data_offset, uint64_t data_size) " (%s) Offset 0x%"PRIx64" size 0x%"PRIx64
vfio_load_cleanup(const char *name) " (%s)"
+vfio_get_dirty_bitmap(int fd, uint64_t iova, uint64_t size, uint64_t bitmap_size, uint64_t start) "container fd=%d, iova=0x%"PRIx64" size= 0x%"PRIx64" bitmap_size=0x%"PRIx64" start=0x%"PRIx64