From: Matthew Garrett <mjg59-1xO5oi07KQx4cg9Nei1l7Q@public.gmane.org>
To: David Woodhouse <dwmw2-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
Cc: Matt Fleming
<matt.fleming-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
x86-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org,
"H. Peter Anvin" <hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>,
linux-efi <linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: [PATCH] Fix efifb initialisation when the only GOP device implements ConOut.
Date: Mon, 7 Jan 2013 18:43:20 +0000 [thread overview]
Message-ID: <20130107184320.GA1400@srcf.ucam.org> (raw)
In-Reply-To: <1357583795.2844.18.camel-Fexsq3y4057IgHVZqg5X0TlWvGAXklZc@public.gmane.org>
On Mon, Jan 07, 2013 at 06:36:35PM +0000, David Woodhouse wrote:
> On Mon, 2013-01-07 at 17:58 +0000, Matthew Garrett wrote:
> > Ignore this case? You can't run 32-bit kernels on 64-bit EFI, or
> > vice-versa. You'll die on the first call to UEFI services.
>
> The kernel has code to avoid calling UEFI services in that case. Even if
> we don't want to support that (any more?), we should at least fail
> gracefully rather than just jumping to the wrong entry point and having
> RandomShit™ happening.
The kernel does, the EFI boot stub doesn't. There's probably an argument
for having it fail in that case, but it wouldn't even be able to print
an error message without some gymnastics.
--
Matthew Garrett | mjg59-1xO5oi07KQx4cg9Nei1l7Q@public.gmane.org
next prev parent reply other threads:[~2013-01-07 18:43 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1357431222.9270.73.camel@shinybook.infradead.org>
[not found] ` <1357431222.9270.73.camel-Fexsq3y4057IgHVZqg5X0TlWvGAXklZc@public.gmane.org>
2013-01-07 17:08 ` [PATCH] Fix efifb initialisation when the only GOP device implements ConOut Matt Fleming
[not found] ` <1357524250.9270.86.camel@shinybook.infradead.org>
[not found] ` <1357524250.9270.86.camel-Fexsq3y4057IgHVZqg5X0TlWvGAXklZc@public.gmane.org>
2013-01-07 17:15 ` Matt Fleming
[not found] ` <1357578923.8203.72.camel-ZqTwcBeJ+wsBof6jY8KHXm7IUlhRatedral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2013-01-07 17:51 ` David Woodhouse
[not found] ` <1357581080.2844.17.camel-Fexsq3y4057IgHVZqg5X0TlWvGAXklZc@public.gmane.org>
2013-01-07 17:58 ` Matthew Garrett
[not found] ` <20130107175846.GA385-1xO5oi07KQx4cg9Nei1l7Q@public.gmane.org>
2013-01-07 18:36 ` David Woodhouse
[not found] ` <1357583795.2844.18.camel-Fexsq3y4057IgHVZqg5X0TlWvGAXklZc@public.gmane.org>
2013-01-07 18:43 ` Matthew Garrett [this message]
[not found] ` <20130107184320.GA1400-1xO5oi07KQx4cg9Nei1l7Q@public.gmane.org>
2013-01-07 19:12 ` David Woodhouse
[not found] ` <1357585971.2844.22.camel-Fexsq3y4057IgHVZqg5X0TlWvGAXklZc@public.gmane.org>
2013-01-07 19:16 ` Matthew Garrett
[not found] ` <20130107191648.GA2229-1xO5oi07KQx4cg9Nei1l7Q@public.gmane.org>
2013-01-07 19:45 ` David Woodhouse
[not found] ` <1357524456.9270.90.camel@shinybook.infradead.org>
[not found] ` <1357524456.9270.90.camel-Fexsq3y4057IgHVZqg5X0TlWvGAXklZc@public.gmane.org>
2013-01-07 18:58 ` [PATCH] Specify ELF ABI for EFI handover protocol Matt Fleming
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