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Re: [PATCH v2] xen/x86: restrict XENFEAT_pae_pgdir_above_4gb setting to PV guests
- To: Roger Pau Monné <roger@xxxxxxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Thu, 1 Oct 2026 17:05:13 +0200
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- Cc: 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: Thu, 01 Oct 2026 15:05:39 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 01.10.2026 16:05, Roger Pau Monné wrote:
> On Thu, Oct 01, 2026 at 01:05:39PM +0200, Jan Beulich wrote:
>> On 01.10.2026 11:19, Roger Pau Monne wrote:
>>> XENFEAT_pae_pgdir_above_4gb is only used by 32bit PV guests, hence limit
>>> its setting in XENVER_get_features to the is_pv_domain() guarded section,
>>> with the rest of the PV specific features.
>>>
>>> No functional change intended.
>>>
>>> Signed-off-by: Roger Pau Monné <roger@xxxxxxxxxxxxxx>
>>> ---
>>> Changes since v1:
>>> - Just move the conditional but don't merge it.
>>
>> And still no CONFIG_PV32 dependency?
>
> Andrew specifically asked for this form, or at least that was my
> understanding.
Well, Misra-wise you've added unreachable code this way.
Jan
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