Re: [Xen-devel] [PATCH v10] x86/altp2m: support for setting restrictions for an array of pages

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Wed, Dec 13, 2017 at 04:22:20PM +0200, Petre Pircalabu wrote:
>  /** 
>   * Mem paging operations.
> diff --git a/tools/libxc/xc_altp2m.c b/tools/libxc/xc_altp2m.c
> index 07fcd18..0f792b5 100644
> --- a/tools/libxc/xc_altp2m.c
> +++ b/tools/libxc/xc_altp2m.c
> @@ -213,3 +213,44 @@ int xc_altp2m_change_gfn(xc_interface *handle, uint32_t 
> domid,
>      return rc;
>  }
>  
> +int xc_altp2m_set_mem_access_multi(xc_interface *xch, uint32_t domid,
> +                                   uint16_t view_id, uint8_t *access,
> +                                   uint64_t *pages, uint32_t nr)
> +{
> +    int rc;
> +
> +    DECLARE_HYPERCALL_BUFFER(xen_hvm_altp2m_op_t, arg);
> +    DECLARE_HYPERCALL_BOUNCE(access, nr * sizeof(*access),
> +                             XC_HYPERCALL_BUFFER_BOUNCE_IN);
> +    DECLARE_HYPERCALL_BOUNCE(pages, nr * sizeof(*pages),
> +                             XC_HYPERCALL_BUFFER_BOUNCE_IN);
> +
> +    arg = xc_hypercall_buffer_alloc(xch, arg, sizeof(*arg));
> +    if ( arg == NULL )
> +        return -1;
> +
> +    arg->version = HVMOP_ALTP2M_INTERFACE_VERSION;
> +    arg->cmd = HVMOP_altp2m_set_mem_access_multi;
> +    arg->domain = domid;
> +    arg->u.set_mem_access_multi.view = view_id;
> +    arg->u.set_mem_access_multi.nr = nr;
> +
> +    if ( xc_hypercall_bounce_pre(xch, pages) ||
> +         xc_hypercall_bounce_pre(xch, access) )
> +    {
> +        PERROR("Could not bounce memory for 
> HVMOP_altp2m_set_mem_access_multi");
> +        return -1;
> +    }
> +
> +    set_xen_guest_handle(arg->u.set_mem_access_multi.pfn_list, pages);
> +    set_xen_guest_handle(arg->u.set_mem_access_multi.access_list, access);
> +
> +    rc = xencall2(xch->xcall, __HYPERVISOR_hvm_op, HVMOP_altp2m,
> +               HYPERCALL_BUFFER_AS_ARG(arg));

Tabs here.

With this fixed, libxc bits:

Acked-by: Wei Liu <wei.liu2@xxxxxxxxxx>


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