[Xen-devel] Latest development (master) Xen fails to boot on HP ProLiant DL20 GEN10

[Roman Shaposhnik <roman@xxxxxxxxxx>]

Hi!

I'm a bit at a loss of what's happening here, but it seems that
the latest Xen from master fails to boot on HP ProLiant DL20
GEN10 server (same Xen boots fine on every other piece of
hardware in my lab).

There are absolutely no signs of what's going wrong with it.
It just stops at

(XEN) HVM: ASIDs enabled.
(XEN) HVM: VMX enabled
(XEN) HVM: Hardware Assisted Paging (HAP) detected
(XEN) HVM: HAP page sizes: 4kb, 2MB, 1GB
...
(XEN) Adding cpu 1 to runqueue 0
(XEN) mwait-idle: max C-state count of 8 reached
(XEN) Adding cpu 2 to runqueue 0
(XEN) mwait-idle: max C-state count of 8 reached

I guess the only clue is that your typical line of:

(XEN) Brought up X CPUs

never gets printed -- so perhaps there's something wonky
going on with CPU initialization.

Any advice on how to diagnose this further will be greatly appreciated.

Thanks,
Roman.

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