Re: [Xen-devel] [PATCH v4 5/5] fix: add multiboot2 protocol support for EFI platforms

[Daniel Kiper <daniel.kiper@xxxxxxxxxx>]

On Thu, Jan 19, 2017 at 09:25:08AM -0500, Doug Goldstein wrote:
> On 1/19/17 6:56 AM, Daniel Kiper wrote:
> >> Can you tell me what were the fixes to the relocation code?
> >
> > Unfortunately I have not received any details from you. Just vague
> > statements that it does not work. So, I am not able to say anything
> > about that. If you provide more details I am happy to help.
>
> We discussed this on your original v11 thread. It fails on Intel NUCs,
> Lenovo T430, Dell PowerEdge something (I'm on vacation so I can't see
> the model number), HP Proliant ML10, QEMU (with OVMF) and some other

Do you use QEMU with KVM enabled? I was hit twice by an issue (I do not
remember the detail right now) when OVMF was running in KVM. When I disabled
KVM then everything worked without any issue. It does not happen often but...

> broads that I don't remember the model number off of my head. Its about
> a dozen machines all together. They fail in two different ways:
>
> - the other CPUs are reported as stuck and the machine boots but 'xl
> info' reports 1 available CPU.
> - when the non-CPUs are brought up it dies when setting paging back into
> cr0.
>
> Every single machine fails in one of these two ways.

Hmmm... I have not seen that anywhere. And nobody except you reported such
issue. Is it happening with GRUB2 and/or iPXE?

Anyway, I have just released v12. It contains various fixes including
yours. I hope that I have not missed anything. Please take a look.

In the meantime I will try to find one of machines mentioned above and
reproduce this issue there.

Daniel

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