Re: [PATCH 3/3] x86/PCI: Preserve host bridge windows completely covered by E820

[Bjorn Helgaas]

On Fri, Mar 04, 2022 at 04:46:11PM +0100, Hans de Goede wrote:
> On 3/4/22 16:32, Bjorn Helgaas wrote:

> > I think what might add useful information would be to always log the
> > EFI "RUN" entries.  IIUC, currently the "efi: mem47: ..." lines are
> > only emitted when booting with "efi=debug"?
> > 
> > I think the "RUN" lines indicate regions that must be virtually mapped
> > so EFI runtime services can use them, and it seems like it might be
> > more generally useful to always mention them.
> 
> I'm not sure about always logging the EFI memmap I agree it might
> be useful sometimes, but it is easy to enable then and the initial
> boot code of the kernel already is pretty "chatty".

Yeah.  I didn't mean all of the EFI memmap, just the parts that we're
sharing with firmware.  But I guess everybody probably has different
parts of the map they think would be interesting :)