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hw/vmapple/virtio-blk: Add support for apple virtio-blk

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Apple has its own virtio-blk PCI device ID where it deviates from the
official virtio-pci spec slightly: It puts a new "apple type"
field at a static offset in config space and introduces a new barrier
command.

This patch first creates a mechanism for virtio-blk downstream classes to
handle unknown commands. It then creates such a downstream class and a new
vmapple-virtio-blk-pci class which support the additional apple type config
identifier as well as the barrier command.

The 'aux' or 'root' device type are selected using the 'variant' property.

Signed-off-by: Alexander Graf <graf@amazon.com>
Signed-off-by: Phil Dennis-Jordan <phil@philjordan.eu>
Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Tested-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-ID: <20241223221645.29911-13-phil@philjordan.eu>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
This commit is contained in:
Alexander Graf 2023-06-14 22:56:22 +00:00 • committed by Philippe Mathieu-Daudé
parent 33b5446206
commit ee241d79bb
10 changed files with 264 additions and 4 deletions
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14
qapi/virtio.json
View file

@ -992,3 +992,17 @@
##
{ 'enum': 'GranuleMode',
'data': [ '4k', '8k', '16k', '64k', 'host' ] }
##
# @VMAppleVirtioBlkVariant:
#
# @unspecified: The default, not a valid setting.
#
# @root: Block device holding the root volume
#
# @aux: Block device holding auxiliary data required for boot
#
# Since: 9.2
##
{ 'enum': 'VMAppleVirtioBlkVariant',
'data': [ 'unspecified', 'root', 'aux' ] }