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From: Gerd Hoffmann <kraxel@redhat.com>
Date: Thu, 13 Nov 2014 09:32:01 +0100
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Subject: Re: [Qemu-devel] [Linaro-acpi] [RFC PATCH 0/7] hw/arm/virt: Dynamic
 ACPI v5.1 table generation
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To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Maydell <peter.maydell@linaro.org>, "Ian.Campbell@citrix.com" <Ian.Campbell@citrix.com>, Arnd Bergmann <arnd@arndb.de>, linaro-acpi@lists.linaro.org, Claudio Fontana <claudio.fontana@huawei.com>, QEMU Developers <qemu-devel@nongnu.org>, "stefano.stabellini@citrix.com" <stefano.stabellini@citrix.com>, "tech@virtualopensystems.com" <tech@virtualopensystems.com>, Parth Dixit <parth.dixit@linaro.org>, Christoffer Dall <christoffer.dall@linaro.org>

  Hi,

> The PowerPC folks are using u-boot as the firmware.  I know Peter
> disagrees, but I don't understand why so I'll throw this up for
> discussion too; it is definitely lighter-weight than UEFI.  Would that
> make sense for ARM?

Played around with that.  Look here:

https://www.kraxel.org/cgit/jenkins/u-boot/tree/
https://www.kraxel.org/repos/jenkins/u-boot/

[ based on fedora uboot package, some vexpress patches on top ]

Problems I ran into:

 * u-boot has no virto support.
 * sdcard emulation is painfully slow on arm kvm.

Oh, and working with u-boot upstream is *ahem* a challenge.  After
trying to get a patch upstream (rpm patch #8) I'm not really surprised
any more that there are so many u-boot forks around.

Making edk2 fly on arm looks more promising to me.  Especially for
aarch64 of course, but also for armv7 + -M virt.

cheers,
  Gerd