Re: [Xen-devel] Xen-unstable + dom0 linux-4.14-rc6: bisected pci-passthrough problem to HVM

[Sander Eikelenboom <linux@xxxxxxxxxxxxxx>]

On 25/10/17 22:34, Boris Ostrovsky wrote:
> On 10/25/2017 04:05 PM, Sander Eikelenboom wrote:
>> Hi Juergen and Boris,
>>
>> While testing out linux 4.14-rc6 i found some trouble with one of my devices 
>> for which I use pci-passthrough. 
>> It fails to start a HVM when configured to use pci-passthrough on this 
>> particular device (see below for lspci output)
>> Using other pci devices for passthrough still works ok, it seems only this 
>> particular device is affected on my system.
>>
>> libxl: error: libxl_qmp.c:457:qmp_next: Domain 3:Socket read error: 
>> Connection reset by peer
>> libxl: error: libxl_pci.c:1295:libxl__add_pcidevs: Domain 
>> 3:libxl_device_pci_add failed: -3
>> libxl: error: libxl_create.c:1495:domcreate_attach_devices: Domain 3:unable 
>> to add pci devices
>> libxl: error: libxl_domain.c:1000:libxl__destroy_domid: Domain 
>> 3:Non-existant domain
>> libxl: error: libxl_domain.c:959:domain_destroy_callback: Domain 3:Unable to 
>> destroy guest
>> libxl: error: libxl_domain.c:886:domain_destroy_cb: Domain 3:Destruction of 
>> domain failed
>>
>> I bisected the dom0 kernel and found:
>>     ce56a86e2ade45d052b3228cdfebe913a1ae7381 is the first bad commit
>>     commit ce56a86e2ade45d052b3228cdfebe913a1ae7381
>>     Author: Craig Bergstrom <craigb@xxxxxxxxxx>
>>     Date:   Thu Oct 19 13:28:56 2017 -0600
>>
>>     x86/mm: Limit mmap() of /dev/mem to valid physical addresses
> 
> Consider yourself lucky, at least you didn't crash ;-)

*lol*

> 
> https://lkml.org/lkml/2017/10/23/652

Can't beat the 0-day-bot ;)
At least nothing Xen specific then, thx for the pointer !

> 
> -boris
> 
--
Sander

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