linux-kernel - Re: Confusions with reserve_early, reserve_bootmem, e820, efi, ... on x86

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Message-ID: <86802c440806121506o8628227he7522c35d906664b@mail.gmail.com>
Date:	Thu, 12 Jun 2008 15:06:32 -0700
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	"Paul Jackson" <pj@....com>
Cc:	"H. Peter Anvin" <hpa@...or.com>, andi@...stfloor.org,
	mingo@...e.hu, bwalle@...e.de, hannes@...urebad.de,
	ying.huang@...el.com, linux-kernel@...r.kernel.org, steiner@....com
Subject: Re: Confusions with reserve_early, reserve_bootmem, e820, efi, ... on x86_64

On Thu, Jun 12, 2008 at 2:52 PM, Paul Jackson <pj@....com> wrote:
> hpa writes:
>> It's probably safer to reserve the EBDA even with EFI; it's only a page
>> or so so it doesn't matter much.
>
> Reserving EBDA with EFI is fine by what little I know.
>
> But the current code doesn't like it -- if the EFI memmap range is inside
> the EBDA range, then the reserve_early() routine panics with:
>
>    "Overlapping early reservations"
>
> Something needs tweaking here somehow ... and I'm not the one to know what.

what is addr that the EFI memmap should be according to spec?

YH
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