[coreboot] Discussion about dynamic PCI MMIO size on x86

[ron minnich]

On Mon, Jun 6, 2016 at 12:52 PM Patrick Rudolph <siro at das-labor.org> wrote:

> To summarize:
> The easy way is to use 2G.
> The preferred way would be to mimic mrc behaviour and reboot after
> finding the correct size.
>
>
>
I'm not sure it's "easy vs. preferred" so much as
- simple that has no known failure cases (yet).
- best that requires that we have another variable we have to store in flash

At least to me, it's not as cut and dried as easy vs. preferred. The
preferred way adds a lot of moving runtime parts, and we'll need to cover
for the case that the stored variable gets damaged somehow. The easy way is
a runtime constant, which I kind of like.

If the "easy" way always works, i.e. we never find a case where it causes a
problem, then it seems superior to me.

ron
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