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From: Manuel Bouyer <bouyer@antioche.eu.org>
To: xen-devel@lists.xen.org
Subject: HVM BIOS ROM and modules
Date: Tue, 25 Aug 2020 00:29:18 +0200	[thread overview]
Message-ID: <20200824222918.GA522@antioche.eu.org> (raw)

Hello again,
I'm now facing another issue with qemu-xen, this time on Xen 4.13

Starting a HVM domains with qemu-xen instead of qemu-dm fails with
(d9) Writing SMBIOS tables ...
(d9) Loading SeaBIOS ...
(d9) no BIOS ROM image found
(d9) *** HVMLoader bug at hvmloader.c:394
(d9) *** HVMLoader crashed.

I tracked this down to info->nr_modules being 0 in
hvmloader.c:get_module_entry()

but I failed to see where this is supposed to be initialised.
qemu-system-i386 does read the ROM file (I checked with ktrace) but
I can't see where it would setup info->nr_modules for the guest
(it does for PVH but not for HVM, AFAIK).
Is qemu supposed to setup modules params in info, or should
xl do it ? If the former, where does it happens in qemu-xen sources ?
If the later, how does it know which rom to load ?

thanks,

-- 
Manuel Bouyer <bouyer@antioche.eu.org>
     NetBSD: 26 ans d'experience feront toujours la difference
--


                 reply	other threads:[~2020-08-24 22:29 UTC|newest]

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