regression in recent pvops kernels, dom0 crashes early

[Olaf Hering <olaf@xxxxxxxxx>]

Recent pvops dom0 kernels fail to boot on this particular ProLiant BL465c G5 
box.
It happens to work with every Xen and a 4.4 based sle12sp3 kernel, but fails 
with every Xen and a 4.12 based sle12sp4 (and every newer) kernel.

Any idea what is going on?

....
(XEN) Freed 256kB init memory.
(XEN) mm.c:1758:d0 Bad L1 flags 800000
(XEN) traps.c:458:d0 Unhandled invalid opcode fault/trap [#6] on VCPU 0 
[ec=0000]
(XEN) domain_crash_sync called from entry.S: fault at ffff82d08022a2a0 
create_bounce_frame+0x133/0x143
(XEN) Domain 0 (vcpu#0) crashed on cpu#0:
(XEN) ----[ Xen-4.4.20170405T152638.6bf0560e12-9.xen44  x86_64  debug=y  Not 
tainted ]----
....

....
(XEN) Freed 656kB init memory
(XEN) mm.c:2165:d0v0 Bad L1 flags 800000
(XEN) d0v0 Unhandled invalid opcode fault/trap [#6, ec=ffffffff]
(XEN) domain_crash_sync called from entry.S: fault at ffff82d04031a016 
x86_64/entry.S#create_bounce_frame+0x15d/0x177
(XEN) Domain 0 (vcpu#0) crashed on cpu#5:
(XEN) ----[ Xen-4.15.20210504T145803.280d472f4f-6.xen415  x86_64  debug=y  Not 
tainted ]----
....

I can probably cycle through all kernels between 4.4 and 4.12 to see where it 
broke.


Olaf

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Attachment: xen_415.tw.txt.gz
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