[PATCH 1/1] x86: add "udb" opcode (permanent official #UD in 64-bit mode)

[Jan Beulich]

On 12.08.2025 05:01, Jiang, Haochen wrote:
>> From: H. Peter Anvin <hpa@zytor.com>
>> Sent: Tuesday, August 12, 2025 10:27 AM
>>>>>
>>>>> This will be documented in the next version of the Intel Software
>>>>> Developer's Manual; in the meantime I DO speak officially for Intel on
>>>
>>> If you do think we need to hurry this patch in before next SDM published,
>>> which should happen at the end of September, please make sure you add
>>> this into the patch note since it is not released yet.
>>>
>>>>> this issue.
>>>>>
>>>>> The x86 Advisory Council has ratified this decision, and so it is
>>>>> expected to be honored across vendors, but I obviously cannot make any
>>>>> official statement on any other vendor's behalf.
>>>>>
>>>>> I am covered by the Intel-FSF copyright assignment for binutils.
>>>>>
>>>>> Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
>>
>> Didn't I do exactly that?
> 
> It is just a reminder in case we change something in the patch afterwards :) if
> we decide to commit the patch now. (while I still prefer commit the patch after
> the documentation publish in September unless there is anyone else need that
> in a hurry since we typically will wait for documentation when Binutils feature
> freeze window is still quite far away, waiting Jan for his opinion.)

I'd be happy to see this go in right away. What's said in the description is
certainly enough of an assurance, imo.

Jan