"Michael S. Tsirkin" <mst@xxxxxxxxxx> writes:
> Fix issues observed with the new layout code, seen
> when implementing device in qemu:
> - use of uXX in uapi header
> - incorrect readonly tag on one field
> - unconditional warning breaks builds with -Werr
>
> Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
Hmm, this means if we ever *do* remove those defines, qemu will break.
But perhaps that's OK, because we'll probably remove legacy support at
the same time as we break the header.
Applied, thanks!
Rusty.
> This patch is on top of rusty/virtio-pci-new-layout.
>
> include/uapi/linux/virtio_pci.h | 12 +++++++-----
> 1 file changed, 7 insertions(+), 5 deletions(-)
>
> diff --git a/include/uapi/linux/virtio_pci.h b/include/uapi/linux/virtio_pci.h
> index 3e61d55..cda688f 100644
> --- a/include/uapi/linux/virtio_pci.h
> +++ b/include/uapi/linux/virtio_pci.h
> @@ -86,8 +86,10 @@
> #define VIRTIO_PCI_LEGACY_VRING_ALIGN 4096
>
> #ifndef VIRTIO_PCI_NO_LEGACY
> +#ifndef VIRTIO_PCI_LEGACY_COMPAT_NAMES
> /* Don't break compile of old userspace code. These will go away. */
> #warning "Please support virtio_pci non-legacy mode!"
> +#endif
> #define VIRTIO_PCI_HOST_FEATURES VIRTIO_PCI_LEGACY_HOST_FEATURES
> #define VIRTIO_PCI_GUEST_FEATURES VIRTIO_PCI_LEGACY_GUEST_FEATURES
> #define VIRTIO_PCI_QUEUE_PFN VIRTIO_PCI_LEGACY_QUEUE_PFN
> @@ -125,10 +127,10 @@
>
> /* This is the PCI capability header: */
> struct virtio_pci_cap {
> - u8 cap_vndr; /* Generic PCI field: PCI_CAP_ID_VNDR */
> - u8 cap_next; /* Generic PCI field: next ptr. */
> - u8 cfg_type; /* One of the VIRTIO_PCI_CAP_*_CFG. */
> - u8 bar; /* Where to find it. */
> + __u8 cap_vndr; /* Generic PCI field: PCI_CAP_ID_VNDR */
> + __u8 cap_next; /* Generic PCI field: next ptr. */
> + __u8 cfg_type; /* One of the VIRTIO_PCI_CAP_*_CFG. */
> + __u8 bar; /* Where to find it. */
> __le32 offset; /* Offset within bar. */
> __le32 length; /* Length. */
> };
> @@ -144,7 +146,7 @@ struct virtio_pci_common_cfg {
> __le32 device_feature_select; /* read-write */
> __le32 device_feature; /* read-only */
> __le32 guest_feature_select; /* read-write */
> - __le32 guest_feature; /* read-only */
> + __le32 guest_feature; /* read-write */
> __le16 msix_config; /* read-write */
> __le16 num_queues; /* read-only */
> __u8 device_status; /* read-write */
> --
> MST
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