Re: [Xen-devel] [for-4.7 v2 1/2] xen: XENMEM_add_to_physmap_batch: Mark 'foreign_id' as reserved for dev_mmio

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 25.05.16 at 17:56, <julien.grall@xxxxxxx> wrote:
> --- a/xen/common/compat/memory.c
> +++ b/xen/common/compat/memory.c
> @@ -253,6 +253,8 @@ int compat_memory_op(unsigned int cmd, 
> XEN_GUEST_HANDLE_PARAM(void) compat)
>              unsigned int size = cmp.atpb.size;
>              xen_ulong_t *idxs = (void *)(nat.atpb + 1);
>              xen_pfn_t *gpfns = (void *)(idxs + limit);
> +            enum XLAT_add_to_physmap_batch_u u =
> +                XLAT_add_to_physmap_batch_u_res0;

Here you're cheating, and to help future readers understand you are
you should say why this is okay in a comment. Or alternatively handle
things properly.

> --- a/xen/include/public/memory.h
> +++ b/xen/include/public/memory.h
> @@ -259,7 +259,15 @@ struct xen_add_to_physmap_batch {
>  
>      /* Number of pages to go through */
>      uint16_t size;
> -    domid_t foreign_domid; /* IFF gmfn_foreign */
> +
> +#if __XEN_INTERFACE_VERSION__ < 0x00040700
> +    domid_t foreign_domid; /* IFF gmfn_foreign. Should be 0 for other 
> spaces. */
> +#else
> +    union add_to_physmap_batch_extra {

This lacks a xen_ prefix.

Jan


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