Re: [Xen-devel] [PATCH v16 4/9] x86: add multiboot2 protocol support for EFI platforms

[Doug Goldstein <cardoe@xxxxxxxxxx>]

On 3/7/17 9:44 PM, Konrad Rzeszutek Wilk wrote:
> On Tue, Mar 07, 2017 at 12:39:04AM +0100, Daniel Kiper wrote:
>> On Wed, Feb 22, 2017 at 09:04:17AM -0800, Doug Goldstein wrote:
>>
>> [...]
>>
>>> I'm currently at ELC and then on vacation so I don't have access to any
>>> of the machines currently myself. However the machine I most use to test
>>> is a NUC5i5MYHE and a NUC5i3MYHE if you want to ask around if someone
>>> has one internally. But that's why I gave QEMU as an example.
>>>
>>> I was using qemu master from a few weeks ago. I'll have to find the
>>> revision for you. But the command line I use is:
>>>
>>> -enable-kvm -M pc-q35-2.8 -device intel-iommu -cpu host -m 2048 -smp 2
>>> -drive if=pflash,format=raw,file=/tmp/tmp.EiR6ixmYzV -global
>>> isa-debugcon.iobase=0x402 -debugcon file:/tmp/tmp.nuvEXUWfnA -monitor
>>> stdio -chardev socket,host=127.0.0.1,port=25914,id=S0,server,nowait
>>> -device isa-serial,chardev=S0 -device piix3-usb-uhci -device usb-tablet
>>> -netdev id=net0,type=tap -device
>>> virtio-net-pci,netdev=net0,mac=52:54:00:12:34:56 -boot order=n -device
>>> qxl-vga -gdb tcp::14952
>>
>> Sadly, my colleagues and I are not able to reproduce the problem on any of
>> machines available for us (available on the market and some development
>> stuff in our labs). I did tests with QEMU (I am not able to run it with
>> "-device intel-iommu" on my machine; I have to investigate this). Everything
>> works. Joao did some tests on Intel NUC D34010WYK second generation.
>> Everything works. So, Konrad ordered Intel NUC NUC5i3MYHE for me. I am
>> waiting for delivery. Doug, could you tell me what distro, Xen, etc. you
>> have installed on that NUC? I would like to test same config as yours on
>> this machine.
> 
> I had a chat with Doug on IRC and:
>  - I had tested earlier on AMD, while he has only Intel boxes,
>  - He was wondering if this was an IOMMU issue.
> 
> So to double-check that, I installed Ubuntu 16.10 on my X11SAE
> SuperMicro, which has an Haswell E3-1245 v5 and with IOMMU enabled.
> 
> I tested the 'origin/staging' xen.gz build with the upstream grub2
> (I just used the 'master' branch) first and also just booting xen.efi.
> 
> Both worked fine.

Well if this was really the IOMMU issue then there's already a patch in
staging which noops out part of the memory allocator from the first part
of the series that was causing problems.

> 
> Then I used v16 of Daniel's patches (this thread). They are also
> now on        git://xenbits.xen.org/people/konradwilk/xen.git mb2.v16
> also the same way - as xen.efi and then using grub.efi and booting it
> (see below)
> 
> All worked fine.

<snip>

> 
> konrad-Super-Server login: [  188.181526] reboot: Restarting system
> (XEN) Hardware Dom0 shutdown: rebooting machine
> (XEN) APIC error on CPU0: 40(00)
> 
> ... reboot.

So as I've mentioned you have to run 'xl info' and look at nr_cpus to
see the issue.

<snip>

>          Starting Notify bootloader 
> tha[^G^G^G^G^G^G^G^G^G^G^G^G^G^G^G^G^G^G^G^G^G^G  OK  ] Started 
> Notify bootloader that boot was successful.
> 
> Ubuntu 16.10 konrad-Super-Server hvc0
> 
> konrad-Super-Server login: 
> 

Still missing 'xl info'.


-- 
Doug Goldstein

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