linux-kernel - Re: [RFC] Best place/method to determine BIOS version?

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Message-ID: <20140611085548.GB26290@console-pimps.org>
Date:	Wed, 11 Jun 2014 09:55:48 +0100
From:	Matt Fleming <matt@...sole-pimps.org>
To:	Alex Thorlton <athorlton@....com>
Cc:	Linux EFI <linux-efi@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Borislav Petkov <bp@...e.de>, Russ Anderson <rja@....com>
Subject: Re: [RFC] Best place/method to determine BIOS version?

On Mon, 09 Jun, at 03:00:17PM, Alex Thorlton wrote:
> 
> I think the problem is that I really need to be doing this at a point
> where I can directly use physical addressing (the function pointer that
> we have stored in efi.uv_systab contains the physical address of our
> function) - at least that's the idea I get from our BIOS guys, but I
> really don't know what I'm talking about here :)

Can't you use either early_ioremap() or ioremap() (depending on when you
want to access the physical address), perhaps coupled with
efi_call_phys()?

-- 
Matt Fleming, Intel Open Source Technology Center
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