linux-kernel - Re: [PATCH]X86:reboot.c Add some dmi entries to pci_reboot_dmi

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Message-ID: <20100603114627.GA29650@srcf.ucam.org>
Date:	Thu, 3 Jun 2010 12:46:27 +0100
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	"Justin P. Mattock" <justinmattock@...il.com>,
	Robert Hancock <hancockrwd@...il.com>, x86@...nel.org,
	tglx@...utronix.de, linux-kernel@...r.kernel.org
Subject: Re: [PATCH]X86:reboot.c Add some dmi entries to
	pci_reboot_dmi_table.

On Thu, Jun 03, 2010 at 10:54:38AM +0100, Alan Cox wrote:

> At least some PCs you need to issue the reboot outb calls on the boot
> processor so the userspace tests won't be reliable.

The cf9 write is supposed to be handled by the chipset rather than via 
SMM, I believe? The SMM code I've seen for reboots seems to implement 
the actual reboot by hitting that port itself...

-- 
Matthew Garrett | mjg59@...f.ucam.org
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