From: Simon Horman <horms@verge.net.au>
To: dinhngoc.tu@irit.fr
Cc: kexec@lists.infradead.org
Subject: Re: [PATCH] kexec-tools: multiboot2: Correct BASIC_MEMINFO memory units
Date: Wed, 20 Oct 2021 12:01:51 +0200 [thread overview]
Message-ID: <20211020100151.GA19898@vergenet.net> (raw)
In-Reply-To: <001601d7b9c9$4c8be2c0$e5a3a840$@irit.fr>
On Tue, Oct 05, 2021 at 11:13:45AM +0200, dinhngoc.tu@irit.fr wrote:
> > Thanks,
> >
> > I'm curious to know how the current code could have worked.
> > Do we have some testing to verify this change?
>
> Hi,
>
> The current code is not actually used very often when loading Xen (which is
> one of the few things that actually support Multiboot2), as Xen uses the
> EBDA instead of the MB2 memory information on the MB2 boot path.
> However this blows up on EFI systems without CSM (as EBDA is no longer
> available).
>
> I tested the loading of KVM->Xen and Xen->Xen with this patch and a patched
> version of Xen that trusts the MB2 information, on a laptop and a server.
>
> The Multiboot2 documentation at
> https://www.gnu.org/software/grub/manual/multiboot2/multiboot.html#Basic-mem
> ory-information also supports the change.
Thanks, and sorry for the delay.
Applied.
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prev parent reply other threads:[~2021-10-20 10:02 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-24 17:03 [PATCH] kexec-tools: multiboot2: Correct BASIC_MEMINFO memory units dinhngoc.tu
2021-10-05 8:18 ` Simon Horman
2021-10-05 9:13 ` dinhngoc.tu
2021-10-20 10:01 ` Simon Horman [this message]
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