diff options
| author | Minwoo Im <minwoo.im.dev@gmail.com> | 2021-01-24 11:54:45 +0900 |
|---|---|---|
| committer | Klaus Jensen <k.jensen@samsung.com> | 2021-03-09 11:00:55 +0100 |
| commit | eb2e89747eca57fb0028001b28b3c4e0c1540e3a (patch) | |
| tree | 5202cd538a6cfebc5a506cb4895ecb5036ad9e51 /hw/block/nvme.c | |
| parent | 229a834518b950d56fd1bc94923276504d0ee9d4 (diff) | |
hw/block/nvme: introduce nvme-subsys device
To support multi-path in QEMU NVMe device model, We need to have NVMe
subsystem hierarchy to map controllers and namespaces to a NVMe
subsystem.
This patch introduced a simple nvme-subsys device model. The subsystem
will be prepared with subsystem NQN with <subsys_id> provided in
nvme-subsys device:
ex) -device nvme-subsys,id=subsys0: nqn.2019-08.org.qemu:subsys0
Signed-off-by: Minwoo Im <minwoo.im.dev@gmail.com>
Tested-by: Klaus Jensen <k.jensen@samsung.com>
Reviewed-by: Klaus Jensen <k.jensen@samsung.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
[k.jensen: added 'nqn' device parameter per request]
Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
Diffstat (limited to 'hw/block/nvme.c')
| -rw-r--r-- | hw/block/nvme.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/hw/block/nvme.c b/hw/block/nvme.c index fb83636abd..98bd987abc 100644 --- a/hw/block/nvme.c +++ b/hw/block/nvme.c @@ -17,6 +17,7 @@ /** * Usage: add options: * -drive file=<file>,if=none,id=<drive_id> + * -device nvme-subsys,id=<subsys_id>,nqn=<nqn_id> * -device nvme,serial=<serial>,id=<bus_name>, \ * cmb_size_mb=<cmb_size_mb[optional]>, \ * [pmrdev=<mem_backend_file_id>,] \ @@ -38,6 +39,17 @@ * * The PMR will use BAR 4/5 exclusively. * + * To place controller(s) and namespace(s) to a subsystem, then provide + * nvme-subsys device as above. + * + * nvme subsystem device parameters + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * - `nqn` + * This parameter provides the `<nqn_id>` part of the string + * `nqn.2019-08.org.qemu:<nqn_id>` which will be reported in the SUBNQN field + * of subsystem controllers. Note that `<nqn_id>` should be unique per + * subsystem, but this is not enforced by QEMU. If not specified, it will + * default to the value of the `id` parameter (`<subsys_id>`). * * nvme device parameters * ~~~~~~~~~~~~~~~~~~~~~~ |