Re: [QEMU][PATCH v4 05/10] include/hw/xen/xen_common: return error from xen_create_ioreq_server

[Stefano Stabellini]

On Wed, 25 Jan 2023, Vikram Garhwal wrote:
> From: Stefano Stabellini <stefano.stabellini@amd.com>
> 
> This is done to prepare for enabling xenpv support for ARM architecture.
> On ARM it is possible to have a functioning xenpv machine with only the
> PV backends and no IOREQ server. If the IOREQ server creation fails,
> continue to the PV backends initialization.
> 
> Signed-off-by: Stefano Stabellini <stefano.stabellini@amd.com>
> Signed-off-by: Vikram Garhwal <vikram.garhwal@amd.com>

I know I am co-author of the patch but just for record-keeping to
remember that I also reviewed this patch:

Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>


> ---
>  include/hw/xen/xen_common.h | 13 ++++++++-----
>  1 file changed, 8 insertions(+), 5 deletions(-)
> 
> diff --git a/include/hw/xen/xen_common.h b/include/hw/xen/xen_common.h
> index 9a13a756ae..9ec69582b3 100644
> --- a/include/hw/xen/xen_common.h
> +++ b/include/hw/xen/xen_common.h
> @@ -467,9 +467,10 @@ static inline void xen_unmap_pcidev(domid_t dom,
>  {
>  }
>  
> -static inline void xen_create_ioreq_server(domid_t dom,
> -                                           ioservid_t *ioservid)
> +static inline int xen_create_ioreq_server(domid_t dom,
> +                                          ioservid_t *ioservid)
>  {
> +    return 0;
>  }
>  
>  static inline void xen_destroy_ioreq_server(domid_t dom,
> @@ -600,8 +601,8 @@ static inline void xen_unmap_pcidev(domid_t dom,
>                                                    PCI_FUNC(pci_dev->devfn));
>  }
>  
> -static inline void xen_create_ioreq_server(domid_t dom,
> -                                           ioservid_t *ioservid)
> +static inline int xen_create_ioreq_server(domid_t dom,
> +                                          ioservid_t *ioservid)
>  {
>      int rc = xendevicemodel_create_ioreq_server(xen_dmod, dom,
>                                                  HVM_IOREQSRV_BUFIOREQ_ATOMIC,
> @@ -609,12 +610,14 @@ static inline void xen_create_ioreq_server(domid_t dom,
>  
>      if (rc == 0) {
>          trace_xen_ioreq_server_create(*ioservid);
> -        return;
> +        return rc;
>      }
>  
>      *ioservid = 0;
>      use_default_ioreq_server = true;
>      trace_xen_default_ioreq_server();
> +
> +    return rc;
>  }
>  
>  static inline void xen_destroy_ioreq_server(domid_t dom,
> -- 
> 2.17.0
> 
>