Re: [Xen-devel] REGRESSION: Xen 4.13 RC5 fails to bootstrap Dom0 on ARM

[Julien Grall <julien@xxxxxxx>]

Hi,

On 18/12/2019 07:36, Roman Shaposhnik wrote:
> On Tue, Dec 17, 2019 at 6:56 PM Roman Shaposhnik <roman@xxxxxxxxxx> wrote:
> > Exactly! That's the other surprising bit -- I noticed that too -- its not like
> > Xen doesn't see any of the memory above 1G -- it just doesn't see enough of it.
> >
> > So the question is -- what is Linux doing that Xen doesn't?
> By the way, speaking of running Xen under ARM/qemu -- here's an interesting
> observation: when I run qemu-system-aarch64 with -m 4096 option it seems
> that, again, Linux kernel is perfectly content with having access to 4G of RAM,
> while Xen only sees about 2G.
Linux and Xen should see close to the same amount as memory as long as 
you are using the same bootloader...
> This may actually have something to do with UEFI I guess.
...  could you confirm whether you are booting Linux using UEFI or not?

Cheers,

--
Julien Grall

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