[vfio-users] VM doesn't book with kernel 4.2.3-1-vfio

Mon Oct 26 16:06:26 UTC 2015

I'm quirking a root PCIE port for it's downstream PLX chip.

+        /* Z97-WS X16 PLX */
+        0x0c01,

On 24 Oct 2015, at 22:16, Dan Ziemba wrote:

> Does your setup require the ACS patch or are you running a unmodified
> kernel?
> On Oct 25, 2015 1:05 AM, <globalgorrilla at fastmail.fm> wrote:
>
>> qemu and EDK2/OVMF from git have me running again on 4.2.4 and 
>> 4.3.0-rc6.
>>
>> Performance seems quite a bit down with 4.3.0-rc6. Performance in 
>> 4.2.4
>> seems much closer to that with 4.1.
>>
>> On 20 Oct 2015, at 21:54, globalgorrilla at fastmail.fm wrote:
>>
>> It appears it may have been blind luck that I got anything to boot at 
>> all.
>>> Seems all the work required for the fix is not done yet...:
>>>
>>> https://www.mail-archive.com/kvm@vger.kernel.org/msg121381.html
>>>
>>> On 10/20/2015 03:03 PM, globalgorrilla at fastmail.fm wrote:
>>>
>>>> Sry, short reference should be 529a5a8:
>>>>
>>>>
>>>> https://github.com/tianocore/edk2/commit/529a5a860996b5e83941bab50a7b8604139264a1
>>>>
>>>>
>>>> I'm also using qemu 2.4.0.1.
>>>>
>>>> I'm seeing high CPU load on boot the (TianoCore/EDK/OVMF bit) but
>>>> eventually things settle down once Windows is running.
>>>>
>>>> Thanks to Janusz and others who have driven and are driving the 
>>>> issue
>>>> with the EDK team.
>>>>
>>>> On 20 Oct 2015, at 10:05, francesco dicarlo wrote:
>>>>
>>>> can you link the commit on github? can't seem to find it...
>>>>>
>>>>> 2015-10-20 18:49 GMT+02:00 <globalgorrilla at fastmail.fm>:
>>>>>
>>>>> I'm now able to boot my VM again with OVMF and 4.3.0-rc6. I think
>>>>>> this is
>>>>>> the fix for OVMF:
>>>>>>
>>>>>> edk2 git commit 39264a1
>>>>>> ...
>>>>>> 1) Swap PTE init order for QEMU compatibility.
>>>>>> Current PTE initialization algorithm works on HW but breaks QEMU
>>>>>> emulator.  Update the PTE initialization order to be compatible
>>>>>> with both.
>>>>>> ...
>>>>>>
>>>>>> I haven't yet discovered if any MTRR fixes went into 4.3.0-rc6 
>>>>>> for
>>>>>> this to
>>>>>> happen or if this fixes for 4.2 as well.
>>>>>>
>>>>>>
>>>>>> On 19 Oct 2015, at 23:53, Okky Hendriansyah wrote:
>>>>>>
>>>>>> Yes, the maintainer made the LTS version because of the issue on 
>>>>>> the
>>>>>> 4.2.x
>>>>>>
>>>>>>> kernel.
>>>>>>>
>>>>>>> --
>>>>>>> Okky Hendriansyah
>>>>>>>
>>>>>>> On October 20, 2015 at 13:50:58, Alexander Petrenz
>>>>>>> (petrenz.a at gmail.com)
>>>>>>> wrote:
>>>>>>>
>>>>>>> Oh there is an lts version? Thanks! I wasn´t aware of that.
>>>>>>>
>>>>>>> Regards
>>>>>>> Alex
>>>>>>>
>>>>>>> On Tue, Oct 20, 2015 at 8:39 AM, Okky Hendriansyah
>>>>>>> <okky at nostratech.com>
>>>>>>> wrote:
>>>>>>> Hi,
>>>>>>>
>>>>>>> The GLib warning is because of the upgrade on GLib which makes
>>>>>>> existing
>>>>>>> QEMU throw this warning. I remove the warning by applying the 
>>>>>>> patch
>>>>>>> from
>>>>>>> https://lists.gnu.org/archive/html/qemu-devel/2015-09/msg04438.html
>>>>>>>
>>>>>>> You might want to try linux-vfio-lts, the package maintainer of
>>>>>>> linux-vfio made an LTS version which is based on 4.1.10 kernel (
>>>>>>> https://aur.archlinux.org/packages/linux-vfio-lts/).
>>>>>>>
>>>>>>> Thanks.
>>>>>>> --
>>>>>>> Okky Hendriansyah
>>>>>>>
>>>>>>> On October 20, 2015 at 13:19:47, Alexander Petrenz
>>>>>>> (petrenz.a at gmail.com)
>>>>>>> wrote:
>>>>>>>
>>>>>>> Since I´m unable to fix this issue and there doesn´t seem to 
>>>>>>> be much
>>>>>>> information about it... is there an archive where I can get an 
>>>>>>> older
>>>>>>> pkgbuild for a 4.1 vfio kernel?
>>>>>>>
>>>>>>> Regards
>>>>>>> Alex
>>>>>>>
>>>>>>> On Sun, Oct 18, 2015 at 10:45 PM, Alexander Petrenz
>>>>>>> <petrenz.a at gmail.com>
>>>>>>> wrote:
>>>>>>> OK I got rid of the GLib-Warning, but the KVM error is still 
>>>>>>> there.
>>>>>>>
>>>>>>> On Sun, Oct 18, 2015 at 10:14 PM, Alexander Petrenz
>>>>>>> <petrenz.a at gmail.com>
>>>>>>> wrote:
>>>>>>> Thanks for the Hint. I try the short patch vor OVMF
>>>>>>>
>>>>>>> On Sun, Oct 18, 2015 at 10:06 PM, Janusz <januszmk6 at gmail.com> 
>>>>>>> wrote:
>>>>>>> W dniu 18.10.2015 o 21:18, Alexander Petrenz pisze:
>>>>>>>
>>>>>>> Hi,
>>>>>>>>
>>>>>>>> yesterday I compiled the recent version of the vfio kernel 
>>>>>>>> version in
>>>>>>>> AUR. Now my VM doesn't start at all.
>>>>>>>> I'm getting a reproducable error message
>>>>>>>> (http://pastebin.com/YsNBX4Yj)
>>>>>>>> There are no other messages in dmesg, but those I posted 
>>>>>>>> yesterday.
>>>>>>>> Same goes for hardware configuration
>>>>>>>> According to lsmod the KVM module is loaded.
>>>>>>>>
>>>>>>>> Is there some configuration I need to change?
>>>>>>>>
>>>>>>>> Regards
>>>>>>>> Alex
>>>>>>>>
>>>>>>>> Are you using OVMF?
>>>>>>>>
>>>>>>> I don't know if this is the same because you also getting
>>>>>>> "(process:3267): GLib-WARNING **: gmem.c:482: custom memory 
>>>>>>> allocation
>>>>>>> vtable not supported" but there is a known bug in ovmf, since 
>>>>>>> kernel
>>>>>>> 4.2
>>>>>>> because of changes in kvm, you wont be able to start properly VM 
>>>>>>> with
>>>>>>> more than one core,
>>>>>>> http://www.mail-archive.com/kvm@vger.kernel.org/msg121088.html
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
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>>>>>>>
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