Re: [PATCH v3 3/3] x86/hvm: Use white-lists for HVM param guest accessibility checks

[Andrew Cooper <andrew.cooper3@citrix.com>]

On 05/05/15 15:29, Jan Beulich wrote:
>>>> On 05.05.15 at 16:09, <Paul.Durrant@citrix.com> wrote:
>>> From: Andrew Cooper [mailto:andrew.cooper3@citrix.com]
>>> Sent: 05 May 2015 11:54
>>> On 05/05/15 11:25, Paul Durrant wrote:
>>>> @@ -5657,21 +5664,11 @@ static int hvm_allow_set_param(struct domain
>>> *d,
>>>>      case HVM_PARAM_IDENT_PT:
>>>>      case HVM_PARAM_DM_DOMAIN:
>>>>      case HVM_PARAM_ACPI_S_STATE:
>>> I think you can safely elide the above cases into default.  All that
>>> matters in this case is that none of the whitelisted parameters need to
>>> pause the domain.
>>>
>> I think you and Jan differ there, unless I misunderstood Jan.
> Right, I specifically asked for these to be retained. It's just that
> the comment preceding them is not visible from the patch
> context, so that purpose isn't obvious here.

I would question its usefulness as documentation, given that its
position in the code is now removed from the actual implementation.

However, I am not sufficiently fussed to block an otherwise-good change.

~Andrew