From: Matthew Garrett <mjg59@srcf.ucam.org>
To: Matt Fleming <matt@console-pimps.org>
Cc: Vasco Dias <rafa.vasco@gmail.com>,
linux-kernel@vger.kernel.org, mikew@google.com
Subject: Re: Problem with efibootmgr on asus 1215b
Date: Mon, 12 Mar 2012 14:38:06 +0000 [thread overview]
Message-ID: <20120312143806.GB12382@srcf.ucam.org> (raw)
In-Reply-To: <1327060106.3618.53.camel@mfleming-mobl1.ger.corp.intel.com>
Somewhat late to this I know, but:
On Fri, Jan 20, 2012 at 11:48:26AM +0000, Matt Fleming wrote:
> [ 441.370854] BUG: unable to handle kernel paging request at 00000000ffe1fbc8
So it's attempting a direct access to 00000000ffe1fbc8, which, if I had
to guess, is probably where the flash is located. That makes sense from
the perspective of it being used in efivars. The obvious sadness here is
that it's doing this with a physical address rather than a virtual one.
It's possible that the machine is too broken to live - does Windows
succeed in performing a UEFI install? If it does then I think we need to
just accept that life is ugly and map the UEFI runtime areas with a 1:1
mapping as well as into virtual address space. That would also fix the
problem we see right now where the reboot call often uses a physical
address rather than a virtual one.
--
Matthew Garrett | mjg59@srcf.ucam.org
next prev parent reply other threads:[~2012-03-12 14:38 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-01 6:20 Problem with efibootmgr on asus 1215b Vasco Dias
2012-01-01 6:27 ` Vasco Dias
2012-01-20 11:48 ` Matt Fleming
2012-01-20 20:19 ` Mike Waychison
2012-01-21 3:26 ` Vasco Dias
2012-03-12 14:38 ` Matthew Garrett [this message]
2012-03-15 1:29 ` Motiejus Jakštys
2012-03-15 2:27 ` Vasco Dias
2012-03-15 3:06 ` Motiejus Jakštys
2012-03-15 4:23 ` Vasco Dias
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