Re: [Bug Report] Linux v6.15-rc7 boot failure on Xen-4.17

[Andrew Cooper <andrew.cooper3@citrix.com>]

On 27/05/2025 8:21 pm, Xin Li wrote:
>> On May 27, 2025, at 11:36 AM, Jürgen Groß <jgross@suse.com> wrote:
>>
>> On 27.05.25 19:54, Xin Li wrote:
>>> On 5/27/2025 10:46 AM, Pawan Gupta wrote:
>>>>> Attached is the serial console log and my kernel config.
>>>> Serial logs aren't telling much. I do not have a Xen setup to test, without
>>>> Xen the config that you provided is booting a KVM guest just fine.
>>> Yeah, as I replied to Juergen, the same kernel binary boots fine as
>>> "native".
>>> Unfortunately when booting as dom0 on Xen, it keeps rebooting w/o
>>> helpful log.
>> What about booting Xen on bare metal, i.e. no KVM being involved?
> The same exact problem happens on Intel Simics.  And I got to see it’s a NX page fault in dom0 kernel during apply alternatives.

In which case it's likely that there's an opencoded PTE update, rather
than using the hooks (which are suitably paravirt'd).

> It takes a while for me to set it up on bare metal so it won’t happen so soon.
>
> A more serious question in my mind right now is that who are acutely testing latest vanilla Linux on xen?

Only upstream Xen, and we're looking to try and change this.

~Andrew