linux-kernel - Re: [PATCH] x86_64: force re setting the mmconf for fam10h if acpi=off

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Date:	Tue, 26 Feb 2008 08:24:52 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Yinghai Lu <Yinghai.Lu@....COM>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Greg KH <greg@...ah.com>, Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH] x86_64: force re setting the mmconf for fam10h if
	acpi=off


* Yinghai Lu <Yinghai.Lu@....COM> wrote:

> some BIOS only let AMD fam 10h handle bus0, and nvidia mcp55/ck804 to 
> handle other buses. at that case MCFG will cover all over them.
> 
> but with acpi=off, we can not use MCFG. this patch will double check 
> the busnbits, and if it is less handling 256 bues, and acpi=off will 
> forcely reset the mmconf in msr, so we still use mmconf in above case.

thanks, applied.

> @@ -720,14 +720,21 @@ static void __cpuinit fam10h_check_enabl

btw., a cleanliness suggestion: wouldnt it be cleaner to separate all 
the extra AMD family 16 code into a separate file? That should make it 
more focused and more isolated as well.

	Ingo
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