linux-kernel - Re: [patch] x86: Introduce BOOT_EFI and BOOT

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Message-ID: <20140302022334.GA1131@srcf.ucam.org>
Date:	Sun, 2 Mar 2014 02:23:34 +0000
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	"Li, Aubrey" <aubrey.li@...ux.intel.com>,
	"H. Peter Anvin" <hpa@...ux.intel.com>,
	"alan@...ux.intel.com" <alan@...ux.intel.com>,
	linux-kernel@...r.kernel.org, Len.Brown@...el.com,
	Adam Williamson <awilliam@...hat.com>
Subject: Re: [patch] x86: Introduce BOOT_EFI and BOOT_CF9 into the reboot
 sequence loop

On Sat, Mar 01, 2014 at 06:07:18PM -0800, H. Peter Anvin wrote:

> We obviously have been over this a number of times, and the sad thing is
> that we have very limited information.  It is more complex than that,
> even... I believe in some cases KBD works but it is slow, and so takes a
> while.

And we still have the problem that the keyboard controller sometimes 
triggers SMM and that then hangs when it hits a piece of hardware in a 
state it doesn't expect. Sometimes reboot=b or reboot=p is just working 
around some assumptions that we could fix more convincingly.

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