Re: [Xen-devel] [RFC PATCH 9/9] xen: Add use_iommu flag to createdomain domctl

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 15.03.17 at 21:05, <olekstysh@xxxxxxxxx> wrote:
> --- a/xen/include/public/domctl.h
> +++ b/xen/include/public/domctl.h
> @@ -66,6 +66,9 @@ struct xen_domctl_createdomain {
>   /* Is this a xenstore domain? */
>  #define _XEN_DOMCTL_CDF_xs_domain     5
>  #define XEN_DOMCTL_CDF_xs_domain      (1U<<_XEN_DOMCTL_CDF_xs_domain)
> + /* Should IOMMU page tables be populated at the domain creation time? */
> +#define _XEN_DOMCTL_CDF_use_iommu     6
> +#define XEN_DOMCTL_CDF_use_iommu      (1U<<_XEN_DOMCTL_CDF_use_iommu)
>      uint32_t flags;

The need for this to be done via domain creation flag (rather than
as a separate, later step) needs to be well explained. Generally
what to add here should only be things which can't be done later
in a reasonable way.

Jan


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