linux-kernel - Re: [RFC] amd64_edac: syndromes loading

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Message-ID: <20091028172853.GE625@aftab>
Date:	Wed, 28 Oct 2009 18:28:53 +0100
From:	Borislav Petkov <borislav.petkov@....com>
To:	Doug Thompson <norsk5@...oo.com>
CC:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>, x86 <x86@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [RFC] amd64_edac: syndromes loading

On Wed, Oct 28, 2009 at 10:15:03AM -0700, Doug Thompson wrote:
> Where does the syndrome table/module/firmware live in the file system?
> In with the amd64 module area or elsewhere?

Yeah, I was thinking maybe drivers/edac/amd64_x(4|8).bin or so.

Alternatively, we could make the syndromes builtin thus removing the
requirement to go to userspace for the loading. For that we'll need
two new .c files in drivers/edac/ which represent the x4 and x8 tables
respectively:

unsigned short x8_raw_data[] = {
        0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
        0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
        0x0000, 0x0100, 0x0001, 0x0101, 0x01B8, 0x015C, 0x012E, 0x01C6, 0x0163,
        0x01FD, 0x0189, 0x019D, 0xB801, 0x5C01, 0x2E01, 0xC601, 0x6301, 0xFD01,
        0x8901, 0x9D01, 0x0200, 0x0002, 0x0202, 0x0201, 0x02B8, 0x025C, 0x02FD,
	....

The drawback with these is that they'll always be builtin, enlarging
kernel code by 10-15K although only one of them is in use.

-- 
Regards/Gruss,
Boris.

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