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Re: [PATCH v2 2/6] x86/gnttab: do not implement GNTTABOP_cache_flush
- To: Roger Pau Monné <roger.pau@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Fri, 16 May 2025 12:38:02 +0200
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- Cc: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>, Community Manager <community.manager@xxxxxxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Fri, 16 May 2025 10:38:21 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 16.05.2025 12:31, Roger Pau Monné wrote:
> On Fri, May 16, 2025 at 11:48:48AM +0200, Jan Beulich wrote:
>> On 16.05.2025 11:45, Roger Pau Monne wrote:
>>> --- a/xen/common/Kconfig
>>> +++ b/xen/common/Kconfig
>>> @@ -35,6 +35,11 @@ config GRANT_TABLE
>>>
>>> If unsure, say Y.
>>>
>>> +config HAS_GRANT_CACHE_FLUSH
>>> + bool
>>> + depends on GRANT_TABLE
>>> + default ARM
>>
>> To keep arch stuff out of common file as much as possible, I think this
>> instead
>> wants to be a "select ..." from ARM. Then:
>> Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
>
> My first attempt was to do it as you suggest, but then if the users
> disables GRANT_TABLE you get the following warning:
>
> WARNING: unmet direct dependencies detected for HAS_GRANT_CACHE_FLUSH
> Depends on [n]: GRANT_TABLE [=n]
> Selected by [y]:
> - ARM [=y]
> configuration written to .config
Right, it needs to be
select HAS_GRANT_CACHE_FLUSH if GRANT_TABLE
(and the "depends on" on the new HAS_* can also go away; HAS_* imo shouldn't
normally have any dependencies).
Jan
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