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Re: [PATCH 01/24] XSM: reduce redundancy in hook machinery
- To: "Daniel P. Smith" <dpsmith@xxxxxxxxxxxxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Fri, 31 Jul 2026 10:03:51 +0200
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- Cc: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Fri, 31 Jul 2026 08:04:12 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 30.07.2026 20:21, Daniel P. Smith wrote:
> On 7/30/26 11:18 AM, Jan Beulich wrote:
>> On 30.07.2026 17:05, Daniel P. Smith wrote:
>>> On 7/28/26 9:13 AM, Jan Beulich wrote:
>>>> Hooks not taking xsm_default_t as first argument could of course be
>>>> adjusted to take one, at which point they could be covered here as well.
>>>> Question is why there is this difference in the first place.
>>>
>>> I have a theory but I am not confident to write it down. I can see if I
>>> can confirm with DDG if you really care that much to know the why.
>>> Personally having a consistent hook interface convention would provide a
>>> simpler pattern for people to follow if they are having to introdcue a
>>> new hook.
>>
>> Well, I don't really need to know the reason. If you agree that making
>> things uniform is a good move, I can simply stick a few more patches at
>> the end of this series.
>
> Correct me if I am wrong, but we would be introducing an unused
> parameter in exchange for uniform interfaces that can be generated with
> machinery reducing hook maintenance overhead. IMHO I feel from a
> security standpoint this would be a win. Would you disagree?
Definitely not. What I'm unsure is whether I'd call this a security related
win. To me it's more a win in maintainability in general. Which of course
(typically) also helps security of the resulting code.
Jan
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