diff options
Diffstat (limited to 'hw/core/qdev-properties-system.c')
| -rw-r--r-- | hw/core/qdev-properties-system.c | 43 |
1 files changed, 38 insertions, 5 deletions
diff --git a/hw/core/qdev-properties-system.c b/hw/core/qdev-properties-system.c index 42e048f190..ba412dd2ca 100644 --- a/hw/core/qdev-properties-system.c +++ b/hw/core/qdev-properties-system.c @@ -69,8 +69,8 @@ static void set_pointer(Object *obj, Visitor *v, Property *prop, /* --- drive --- */ -static void parse_drive(DeviceState *dev, const char *str, void **ptr, - const char *propname, Error **errp) +static void do_parse_drive(DeviceState *dev, const char *str, void **ptr, + const char *propname, bool iothread, Error **errp) { BlockBackend *blk; bool blk_created = false; @@ -80,9 +80,16 @@ static void parse_drive(DeviceState *dev, const char *str, void **ptr, if (!blk) { BlockDriverState *bs = bdrv_lookup_bs(NULL, str, NULL); if (bs) { - /* BlockBackends of devices start in the main context and are only - * later moved into another context if the device supports that. */ - blk = blk_new(qemu_get_aio_context(), 0, BLK_PERM_ALL); + /* + * If the device supports iothreads, it will make sure to move the + * block node to the right AioContext if necessary (or fail if this + * isn't possible because of other users). Devices that are not + * aware of iothreads require their BlockBackends to be in the main + * AioContext. + */ + AioContext *ctx = iothread ? bdrv_get_aio_context(bs) : + qemu_get_aio_context(); + blk = blk_new(ctx, 0, BLK_PERM_ALL); blk_created = true; ret = blk_insert_bs(blk, bs, errp); @@ -120,6 +127,18 @@ fail: } } +static void parse_drive(DeviceState *dev, const char *str, void **ptr, + const char *propname, Error **errp) +{ + do_parse_drive(dev, str, ptr, propname, false, errp); +} + +static void parse_drive_iothread(DeviceState *dev, const char *str, void **ptr, + const char *propname, Error **errp) +{ + do_parse_drive(dev, str, ptr, propname, true, errp); +} + static void release_drive(Object *obj, const char *name, void *opaque) { DeviceState *dev = DEVICE(obj); @@ -162,6 +181,12 @@ static void set_drive(Object *obj, Visitor *v, const char *name, void *opaque, set_pointer(obj, v, opaque, parse_drive, name, errp); } +static void set_drive_iothread(Object *obj, Visitor *v, const char *name, + void *opaque, Error **errp) +{ + set_pointer(obj, v, opaque, parse_drive_iothread, name, errp); +} + const PropertyInfo qdev_prop_drive = { .name = "str", .description = "Node name or ID of a block device to use as a backend", @@ -170,6 +195,14 @@ const PropertyInfo qdev_prop_drive = { .release = release_drive, }; +const PropertyInfo qdev_prop_drive_iothread = { + .name = "str", + .description = "Node name or ID of a block device to use as a backend", + .get = get_drive, + .set = set_drive_iothread, + .release = release_drive, +}; + /* --- character device --- */ static void get_chr(Object *obj, Visitor *v, const char *name, void *opaque, |