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Re: [Qemu-devel] [PATCH v5 2/2] mach-virt: Provide sample configuration


From: Andrea Bolognani
Subject: Re: [Qemu-devel] [PATCH v5 2/2] mach-virt: Provide sample configuration files
Date: Wed, 08 Feb 2017 19:49:16 +0100

On Wed, 2017-02-08 at 19:11 +0100, Laszlo Ersek wrote:
> How about:
> 
>   For any new guest, its permanent, private variable store should
>   initially be copied from the template file provided as part of the
>   ArmVirtQemu firmware platform (which is occasionally distributed
>   under the AAVMF package).

The naming is confusing enough as it is, no need to drag
ArmVirtQemu into this I think ;)

> > +# Fedora:
> > +#   /usr/share/edk2/aarch64/QEMU_EFI.fd
> > +#   /usr/share/edk2/aarch64/QEMU_VARS.fd
> 
> Please annotate each as firmware binary & variable store template.

I had such annotations at some points, I got rid of them
because they seemed a bit redundant. Added them back in.

> Also, I can't verify the exact pathnames for Fedora.

https://koji.fedoraproject.org/koji/rpminfo?rpmID=8491933 ;)

[...]
> > +# RHEL:
> > +#   /usr/share/AAVMF/AAVMF_CODE.fd
> > +#   /usr/share/AAVMF/AAVMF_VARS.fd
> 
> Looks legit. (Might want to call "RHEL" "RHELSA" though, in this context
> -- no clue. Ask Drew :))

Yeah, you're probably right.

[...]
> Please expand the comment:
> 
>   CHANGE ME TO THE NAME OF THE FILE THAT YOU CREATED AS A COPY of THE
>   VARSTORE TEMPLATE

Nope. The line would get waaay too long, and I trust the
user to understand the basic idea after having gone through
the paragraphs above.

Here's an updated version, what do you think about it?


# Firmware configuration
# =========================================================
#
# There are two parts to the firmware: a read-only image
# containing the executable code, which is shared between
# guests, and a read/write variable store that is owned
# by one specific guest, exclusively, and is used to record
# information such as the UEFI boot order.
#
# For any new guest, its permanent, private variable store
# should initially be copied from the template file
# provided along with the firmware binary.
#
# Depending on the OS distribution you're using on the
# host, the name of the package containing the firmware
# binary and variable store, as well as the paths to the
# files themselves, will be different. Some examples:
#
# Fedora:
#   edk2-aarch64                          (package)
#   /usr/share/edk2/aarch64/QEMU_EFI.fd   (binary)
#   /usr/share/edk2/aarch64/QEMU_VARS.fd  (template)
#
# RHELSA:
#   AAVMF                                 (package)
#   /usr/share/AAVMF/AAVMF_CODE.fd        (binary)
#   /usr/share/AAVMF/AAVMF_VARS.fd        (varstore)

-- 
Andrea Bolognani / Red Hat / Virtualization



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