From: Joao Martins Date: Tue, 7 Mar 2023 12:54:49 +0000 (+0000) Subject: vfio/migration: Query device dirty page tracking support X-Git-Tag: v8.0.0-rc0~16^2~3 X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=95b29658b60786a4b0631d82698e13483b2c2b94;p=users%2Fdwmw2%2Fqemu.git vfio/migration: Query device dirty page tracking support Now that everything has been set up for device dirty page tracking, query the device for device dirty page tracking support. Signed-off-by: Avihai Horon Signed-off-by: Joao Martins Reviewed-by: Cédric Le Goater Link: https://lore.kernel.org/r/20230307125450.62409-15-joao.m.martins@oracle.com Signed-off-by: Alex Williamson --- diff --git a/hw/vfio/migration.c b/hw/vfio/migration.c index 776fd2d7cd..5d1e66f691 100644 --- a/hw/vfio/migration.c +++ b/hw/vfio/migration.c @@ -555,6 +555,19 @@ static int vfio_migration_query_flags(VFIODevice *vbasedev, uint64_t *mig_flags) return 0; } +static bool vfio_dma_logging_supported(VFIODevice *vbasedev) +{ + uint64_t buf[DIV_ROUND_UP(sizeof(struct vfio_device_feature), + sizeof(uint64_t))] = {}; + struct vfio_device_feature *feature = (struct vfio_device_feature *)buf; + + feature->argsz = sizeof(buf); + feature->flags = VFIO_DEVICE_FEATURE_PROBE | + VFIO_DEVICE_FEATURE_DMA_LOGGING_START; + + return !ioctl(vbasedev->fd, VFIO_DEVICE_FEATURE, feature); +} + static int vfio_migration_init(VFIODevice *vbasedev) { int ret; @@ -589,6 +602,8 @@ static int vfio_migration_init(VFIODevice *vbasedev) migration->device_state = VFIO_DEVICE_STATE_RUNNING; migration->data_fd = -1; + vbasedev->dirty_pages_supported = vfio_dma_logging_supported(vbasedev); + oid = vmstate_if_get_id(VMSTATE_IF(DEVICE(obj))); if (oid) { path = g_strdup_printf("%s/vfio", oid);