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Re: regression in recent pvops kernels, dom0 crashes early
- To: Olaf Hering <olaf@xxxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Thu, 13 May 2021 14:09:53 +0100
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On 13/05/2021 14:00, Olaf Hering wrote:
> Am Thu, 13 May 2021 13:29:32 +0100
> schrieb Andrew Cooper <andrew.cooper3@xxxxxxxxxx>:
>
>> Warning: NX (Execute Disable) protection not active
> There was a knob in the BIOS, it was set to "Disabled" for some reason.
> Once enabled, the flag is seen and the dom0 starts fine.
>
> If Xen is booted with 'cpuid=no-nx', the dom0 crashes again.
>
> Thanks for the help, Andrew.
Well - I wouldn't say we're quite done yet.
Clearly between sle12sp3 and sle12sp4 you've picked up a regression
where Linux decides to use NX despite its absence.
If NX is a mandatory feature now, then dom0 ought to error out cleanly
stating this fact.
~Andrew
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