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Re: regression in recent pvops kernels, dom0 crashes early
- To: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- From: Olaf Hering <olaf@xxxxxxxxx>
- Date: Thu, 13 May 2021 14:29:38 +0200
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- Delivery-date: Thu, 13 May 2021 12:29:47 +0000
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Am Thu, 13 May 2021 13:11:10 +0100
schrieb Andrew Cooper <andrew.cooper3@xxxxxxxxxx>:
> If I'm counting bits correctly, that is Xen rejecting the use of the NX
> bit, which is suspicious.
I tried 'dom0=pvh,debug':
...
(XEN) mcheck_poll: Machine check polling timer started.
(XEN) Running stub recovery selftests...
(XEN) Fixup #UD[0000]: ffff82d07fffe040 [ffff82d07fffe040] -> ffff82d040394a17
(XEN) Fixup #GP[0000]: ffff82d07fffe041 [ffff82d07fffe041] -> ffff82d040394a17
(XEN) Fixup #SS[0000]: ffff82d07fffe040 [ffff82d07fffe040] -> ffff82d040394a17
(XEN) Fixup #BP[0000]: ffff82d07fffe041 [ffff82d07fffe041] -> ffff82d040394a17
(XEN) HPET: 0 timers usable for broadcast (3 total)
(XEN) Warning: NX (Execute Disable) protection not active
(XEN) Dom0 has maximum 864 PIRQs
(XEN)
(XEN) ****************************************
(XEN) Panic on CPU 0:
(XEN) Presently, iommu must be enabled for PVH hardware domain
(XEN) ****************************************
...
The other logs have:
(XEN) Warning: NX (Execute Disable) protection not active
Olaf
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