Re: [Xen-devel] [Qemu-devel] [PATCH 8/8] xen/9pfs: build and register Xen 9pfs backend

[Greg Kurz <groug@xxxxxxxx>]

On Mon,  6 Mar 2017 18:12:48 -0800
Stefano Stabellini <sstabellini@xxxxxxxxxx> wrote:

> Signed-off-by: Stefano Stabellini <stefano@xxxxxxxxxxx>
> CC: anthony.perard@xxxxxxxxxx
> CC: jgross@xxxxxxxx
> CC: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
> CC: Greg Kurz <groug@xxxxxxxx>
> ---
>  hw/9pfs/Makefile.objs        | 1 +
>  hw/xen/xen_backend.c         | 1 +
>  include/hw/xen/xen_backend.h | 1 +
>  3 files changed, 3 insertions(+)
> 
> diff --git a/hw/9pfs/Makefile.objs b/hw/9pfs/Makefile.objs
> index da0ae0c..76a81c3 100644
> --- a/hw/9pfs/Makefile.objs
> +++ b/hw/9pfs/Makefile.objs
> @@ -7,3 +7,4 @@ common-obj-$(CONFIG_OPEN_BY_HANDLE) +=  9p-handle.o
>  common-obj-y += 9p-proxy.o
>  
>  obj-y += virtio-9p-device.o
> +obj-y += xen-9p-backend.o

The xen-9p-backend.c file seems to be target agnostic: it can be built
only once. Also, it should only be built if QEMU was configured with
Xen support. Hence:

obj-common-$(CONFIG_XEN_BACKEND) += xen-9p-backend.o

> diff --git a/hw/xen/xen_backend.c b/hw/xen/xen_backend.c
> index 6c21c37..7aa347d 100644
> --- a/hw/xen/xen_backend.c
> +++ b/hw/xen/xen_backend.c
> @@ -585,6 +585,7 @@ void xen_be_register_common(void)
>      xen_be_register("console", &xen_console_ops);
>      xen_be_register("vkbd", &xen_kbdmouse_ops);
>      xen_be_register("qdisk", &xen_blkdev_ops);

#ifdef CONFIG_VIRTFS

> +    xen_be_register("9pfs", &xen_9pfs_ops);

#endif

>  #ifdef CONFIG_USB_LIBUSB
>      xen_be_register("qusb", &xen_usb_ops);
>  #endif
> diff --git a/include/hw/xen/xen_backend.h b/include/hw/xen/xen_backend.h
> index 4f4799a..84e686c 100644
> --- a/include/hw/xen/xen_backend.h
> +++ b/include/hw/xen/xen_backend.h
> @@ -49,6 +49,7 @@ extern struct XenDevOps xen_console_ops;      /* 
> xen_console.c     */
>  extern struct XenDevOps xen_kbdmouse_ops;     /* xen_framebuffer.c */
>  extern struct XenDevOps xen_framebuffer_ops;  /* xen_framebuffer.c */
>  extern struct XenDevOps xen_blkdev_ops;       /* xen_disk.c        */
> +extern struct XenDevOps xen_9pfs_ops;       /* xen-9p-backend.c        */

ditto

>  extern struct XenDevOps xen_netdev_ops;       /* xen_nic.c         */
>  #ifdef CONFIG_USB_LIBUSB
>  extern struct XenDevOps xen_usb_ops;          /* xen-usb.c         */

With the above fixes.

Reviewed-by: Greg Kurz <groug@xxxxxxxx>

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