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virtio_bt: Fix alignment in configuration struct

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The current version of the configuration structure has unaligned
16-bit fields, but according to the specification [1], access to
the configuration space must be aligned.

Add a second, aligned  version of the configuration structure
and a new feature bit indicating that this version is being used.

[1] https://docs.oasis-open.org/virtio/virtio/v1.1/virtio-v1.1.pdf

Signed-off-by: Igor Skalkin <Igor.Skalkin@opensynergy.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
This commit is contained in:
Igor Skalkin 2022-10-24 15:40:33 +02:00 • committed by Luiz Augusto von Dentz
parent 3b1c7c00b8
commit 47c50853bb
2 changed files with 21 additions and 3 deletions
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8
include/uapi/linux/virtio_bt.h
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@ -9,6 +9,7 @@
#define VIRTIO_BT_F_VND_HCI 0 /* Indicates vendor command support */
#define VIRTIO_BT_F_MSFT_EXT 1 /* Indicates MSFT vendor support */
#define VIRTIO_BT_F_AOSP_EXT 2 /* Indicates AOSP vendor support */
#define VIRTIO_BT_F_CONFIG_V2 3 /* Use second version configuration */
enum virtio_bt_config_type {
VIRTIO_BT_CONFIG_TYPE_PRIMARY = 0,
@ -28,4 +29,11 @@ struct virtio_bt_config {
__u16 msft_opcode;
} __attribute__((packed));
struct virtio_bt_config_v2 {
__u8 type;
__u8 alignment;
__u16 vendor;
__u16 msft_opcode;
};
#endif /* _UAPI_LINUX_VIRTIO_BT_H */