Re: [PATCH RESEND v2 2/2] xen/arm: Enlarge identity map space to 127TiB

[Leo Yan <leo.yan@xxxxxxxxxx>]

Hi Henry,

On Tue, Sep 12, 2023 at 03:01:30AM +0000, Henry Wang wrote:

[...]

> At Arm we also test Xen on AVA in our CI, but our setup is based on Yocto
> meta-adlink-ampere layer [1].

Thanks for sharing the info.  Yes, we (Linaro) also work with Yocto
based on EWAOL [1] or TRS [2].

> >> Also, in v1, the problem was also depending on the firmware version. Do you
> >> know if it fails booting on a new or old firmware?
> > 
> > My colleague Alexey (CCed) and I both tested Xen hypervisor on own AVA
> > machine, Alexey produced this issue on his machine with the old
> > firmware, I upgraded to the new firmware so I cannot see the issue
> > anymore.
> > 
> >>>   (XEN) MODULE[0]: 00000807f6df0000 - 00000807f6f3e000 Xen
> >>>   (XEN) MODULE[1]: 00000807f8054000 - 00000807f8056000 Device Tree
> >>>   (XEN) MODULE[2]: 00000000fa834000 - 00000000fc5de1d5 Ramdisk
> >>>   (XEN) MODULE[3]: 00000000fc5df000 - 00000000ffb3f810 Kernel
> 
> I tried to dig a bit more about Xen log printed by our AVA setup, and [2] is 
> our
> RAM and MODULES setup, just FYI and hopefully it helps.

Yeah, the log shows the high address space is above 8TB:

  (XEN) RAM: 0000080000000000 - 000008007fffffff
  (XEN) RAM: 0000080100000000 - 000008039bffffff
  (XEN) RAM: 000008039c000000 - 00000803ffffffff

Appreciate for the log and it's helpful!

Leo

> [1] https://github.com/ADLINK/meta-adlink-ampere
> [2] https://pastebin.com/raw/0DQpmJP1
> 
> Kind regards,
> Henry
> 
>