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 19:16:49 +0000 [thread overview]
Message-ID: <20130107191648.GA2229@srcf.ucam.org> (raw)
In-Reply-To: <1357585971.2844.22.camel-Fexsq3y4057IgHVZqg5X0TlWvGAXklZc@public.gmane.org>
On Mon, Jan 07, 2013 at 07:12:51PM +0000, David Woodhouse wrote:
> On Mon, 2013-01-07 at 18:43 +0000, Matthew Garrett wrote:
> > 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.
>
> Printing an error message is simple enough from assembler; you just need
> to call sys_table->con_out->output_string.
I don't think that's guaranteed to do something unless we've set a
console mode first, but sure, that ought to be an improvement.
> "Sorry, this kernel cannot boot in " (32|64) "-bit mode this way. Your
> bootloader should have ignored the shiny new EFI handover protocol and
> booted it the old way. It would have worked then, albeit without EFI
> runtime services. Which you probably wouldn't have missed."
"(32|64) bit kernels cannot be booted via the EFI handover
protocol on (64|32) bit firmware"?
--
Matthew Garrett | mjg59-1xO5oi07KQx4cg9Nei1l7Q@public.gmane.org
next prev parent reply other threads:[~2013-01-07 19:16 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
[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 [this message]
[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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