Re: [Xen-devel] HVM crash system on AMD APU A8-6600K

[Sander Eikelenboom <linux@xxxxxxxxxxxxxx>]

Tuesday, April 8, 2014, 2:53:34 PM, you wrote:

>> Another thing to check is whether with the IOMMU turned off
>> entirely you also see the problem.

> I've tried with IOMMU disabled through bios and got same problem with hvm.

Hmm from the logs you seem to have a serial console attached,
perhaps wise to also add a "noreboot" to the xen line in grub so it doesn't 
automatically
reboot on crash. There is a small chance it will print something usefull then.

Another thing to check could be if you are running the latest bios, since the 
logs
do report problems with setting up CPU's (APIC and MTRR warnings).

>> - the logs seem to indicate multiple VM starts ("AMD-Vi: Share p2m
>>   table with iommu: p2m table = 0x..."), but that's hard to tell
>>   without guest_loglvl=all

> This lines produced by automatic restarts of empty hvm machine. It
> waits 60 seconds and trying to boot again but with no medium. After
> some reboots it cause host reboot. With medium present it starts once
> but cause reboot in 10 second to 5 minutes.

medium == a disk specified in the config file with "disk=" ?

The automatic restarts are by a script by you ?
From http://wiki.xen.org/wiki/Xen_Configuration_File_Options#HVM:
on_crash
    Behavior when a domain exits with reason 'crash' 

on_crash (Default=None; 
Value='destroy|restart|preserve|rename-restart|coredump-destroy|coredump-restart)

I would say a guest with an (almost) empty config file shouldn't restart 
automatically on crash

> Will try now to build xen with edited xen/include/asm-x86/hvm/support.h




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