Re: [PATCH v2 4/4] x86: adjustments to guest handle treatment

[Roger Pau Monné <roger.pau@xxxxxxxxxx>]

On Tue, Apr 21, 2020 at 11:13:23AM +0200, Jan Beulich wrote:
> First of all avoid excessive conversions. copy_{from,to}_guest(), for
> example, work fine with all of XEN_GUEST_HANDLE{,_64,_PARAM}().
> 
> Further
> - do_physdev_op_compat() didn't use the param form for its parameter,
> - {hap,shadow}_track_dirty_vram() wrongly used the param form,
> - compat processor Px logic failed to check compatibility of native and
>   compat structures not further converted.
> 
> As this eliminates all users of guest_handle_from_param() and as there's
> no real need to allow for conversions in both directions, drop the
> macros as well.
> 
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
> ---
> --- a/xen/drivers/acpi/pmstat.c
> +++ b/xen/drivers/acpi/pmstat.c
> @@ -492,7 +492,7 @@ int do_pm_op(struct xen_sysctl_pm_op *op
>      return ret;
>  }
>  
> -int acpi_set_pdc_bits(u32 acpi_id, XEN_GUEST_HANDLE_PARAM(uint32) pdc)
> +int acpi_set_pdc_bits(u32 acpi_id, XEN_GUEST_HANDLE(uint32) pdc)

Nit: switch to uint32_t while there?

Reviewed-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>

Thanks, Roger.