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

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>

1 files changed, 9 insertions, 0 deletions

diff --git a/hw/core/qdev-properties-system.c b/hw/core/qdev-properties-system.c
index 89f954f569..a91551a5ee 100644
--- a/hw/core/qdev-properties-system.c
+++ b/hw/core/qdev-properties-system.c
@@ -1294,3 +1294,12 @@ const PropertyInfo qdev_prop_endian_mode = {
     .set = qdev_propinfo_set_enum,
     .set_default_value = qdev_propinfo_set_default_value_enum,
 };
+
+const PropertyInfo qdev_prop_vmapple_virtio_blk_variant = {
+    .name  = "VMAppleVirtioBlkVariant",
+    .description = "unspecified/root/aux",
+    .enum_table  = &VMAppleVirtioBlkVariant_lookup,
+    .get   = qdev_propinfo_get_enum,
+    .set   = qdev_propinfo_set_enum,
+    .set_default_value = qdev_propinfo_set_default_value_enum,
+};