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Re: PATCH: Increase System Firmware Max Size

From: Laszlo Ersek
Subject: Re: PATCH: Increase System Firmware Max Size
Date: Fri, 11 Sep 2020 18:06:27 +0200

On 09/11/20 17:23, Daniel P. Berrangé wrote:

> I don't see why we should have this as a hard coded
> limit that is not runtime configurable.
> IOW, why can't we keep our current default and provide a machine type
> property "firmware_max_size" which users can opt-in to setting if
> their particular firmware exceeds normal defaults. That won't impact
> us for migration compat in any way, and lets users have flexibility t
> do what they want.

Technically, this is fine, in my opinion.

My concerns (in distilled form, this time):

- The change increases maintenance burden.

- The change does not benefit most users of QEMU, as the intended guest
payload will not available to most of them at all (regardless of
licensing terms).

- The existence of the property may entice OVMF users to ask us to
enlarge the *current* OVMF firmware platform and to pack more stuff in
it. That is not OK. My counter-proposal ("please contribute a new
platform DSC/FDF under OvmfPkg, and assume co-reviewership for it")
would almost certainly not be acted upon.

That's all.


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