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

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Message-ID: <20091101211305.GB2085@ucw.cz>
Date:	Sun, 1 Nov 2009 22:13:06 +0100
From:	Pavel Machek <pavel@....cz>
To:	Borislav Petkov <borislav.petkov@....com>
Cc:	Doug Thompson <norsk5@...oo.com>, 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 2009-10-28 18:28:53, Borislav Petkov wrote:
> 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.

I believe that 15K is reasonable price to pay for not having to
install another 'firmware' file.
								Pavel

-- 
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