diff options
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/vfio/common.c | 116 | ||||
| -rw-r--r-- | hw/vfio/trace-events | 1 |
2 files changed, 117 insertions, 0 deletions
diff --git a/hw/vfio/common.c b/hw/vfio/common.c index d4959c036d..0a97fbfefb 100644 --- a/hw/vfio/common.c +++ b/hw/vfio/common.c @@ -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%"PRIx64 + " size: 0x%"PRIx64" err: %d", (uint64_t)range->iova, + (uint64_t)range->size, errno); + goto err_out; + } + + cpu_physical_memory_set_dirty_lebitmap((unsigned long *)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) diff --git a/hw/vfio/trace-events b/hw/vfio/trace-events index a75b520881..dd991bd8f2 100644 --- a/hw/vfio/trace-events +++ b/hw/vfio/trace-events @@ -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 |