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doc: describe QEMU virtio block device

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Enhance the description of QEMU block devices

* Describe how to attach a virtio-blk device.
* Sort the command lines for MMC to match the other devices.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Heinrich Schuchardt 2023-07-30 19:39:00 +02:00
parent 7fe3901f67
commit ba187bd38e
1 changed files with 12 additions and 2 deletions
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14
doc/board/emulation/blkdev.rst
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@ -11,8 +11,8 @@ the qemu-system-<arch> command line:
.. code-block:: bash
-device sdhci-pci,sd-spec-version=3 \
-device sd-card,drive=MMC1 \
-drive if=none,file=disk.img,format=raw,id=MMC1
-drive if=none,file=disk.img,format=raw,id=MMC1 \
-device sd-card,drive=MMC1
* NVMe
@ -36,3 +36,13 @@ the qemu-system-<arch> command line:
-device qemu-xhci \
-drive if=none,file=disk.img,format=raw,id=USB1 \
-device usb-storage,drive=USB1
* Virtio
.. code-block:: bash
-drive if=none,file=disk.img,format=raw,id=VIRTIO1 \
-device virtio-blk,drive=VIRTIO1
.. note::
As of v2023.07 U-Boot does not have a driver for virtio-scsi-pci.