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Re: [PATCH v4 22/24] xen/domctl: domctl_lock synchronization only when MGMT_HYPERCALLS=y
- To: Penny Zheng <Penny.Zheng@xxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Wed, 26 Nov 2025 10:36:40 +0100
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- Cc: ray.huang@xxxxxxx, grygorii_strashko@xxxxxxxx, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Wed, 26 Nov 2025 09:36:50 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 26.11.2025 10:20, Jan Beulich wrote:
> On 21.11.2025 11:57, Penny Zheng wrote:
>> Helper domctl_lock_{acquire,release} is domctl_lock, which HVM_PARAM_IDENT_PT
>> uses to ensure synchronization on potential domctl-op altering guest state.
>> So it is only needed when MGMT_HYPERCALLS=y.
>>
>> Suggested-by: Jan Beulich <jbeulich@xxxxxxxx>
>> Signed-off-by: Penny Zheng <Penny.Zheng@xxxxxxx>
>
> Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
>
> I'd like to note though that ...
>
>> ---
>> v3 -> v4:
>> - new commit
>> ---
>> xen/arch/x86/hvm/hvm.c | 5 +++--
>> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> ... with this diffstat the subject prefix is pretty misleading once again. I
> may
> take the liberty and convert it to x86/hvm: (and then also add parentheses to
> domctl_lock()).
Actually, the series looks to be in need of a full re-submission anyway. I.e. I
can't sensibly cherry-pick parts to put in early.
Jan
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