linux-kernel - Re: [git pull request] ACPI patches for 2.6.34-rc6

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Message-ID: <20100511182253.GB19264@srcf.ucam.org>
Date:	Tue, 11 May 2010 19:22:53 +0100
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Len Brown <lenb@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-acpi@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [git pull request] ACPI patches for 2.6.34-rc6

On Tue, May 11, 2010 at 11:17:34AM -0700, Linus Torvalds wrote:
> 
> 
> On Tue, 11 May 2010, Matthew Garrett wrote:
> > 
> > I see Windows write the SCI_EN bit without reading it first and without 
> > calling the ACPI enable SMM function.
> 
> Hmm. So presumably Windows doesn't even do them bit-by-bit, but simply 
> does a "restore PM1 Control register value" on resume.

Yup.

> And I guess it probably does the same for the PM1_ENABLE register and the 
> PM2 control registers too?

Haven't checked those, but could do so easily enough.

(I say easily enough. Turns out that getting Windows to do S3 under qemu 
is a fair amount of work)
-- 
Matthew Garrett | mjg59@...f.ucam.org
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