From: Matt Fleming <matt.fleming@intel.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Shea Levy <shea@shealevy.com>, "H. Peter Anvin" <hpa@zytor.com>,
linux-kernel@vger.kernel.org
Subject: Re: EFI Boot Stub Early Console
Date: Mon, 19 Mar 2012 16:03:09 +0000 [thread overview]
Message-ID: <1332172989.4041.52.camel@mfleming-mobl1.ger.corp.intel.com> (raw)
In-Reply-To: <20120319155639.7cff5df6@pyx>
On Mon, 2012-03-19 at 15:56 +0000, Alan Cox wrote:
> > > any bootloader (including the bootstub) will call ExitBootServices()
> > > before any printk'ing actually happens?? Or am I misunderstanding the
> > > spec somehow? I suppose I could just try it and see what happens...
> >
> > Oops. Good point, that isn't going to work.
>
> Surely it works fine if you are using bootstub directly from EFI ?
Yeah, up until the point you call ExitBootServices(), which is very
early in the boot process. After that you can't rely on the validity of
the console pointers in the system table.
next prev parent reply other threads:[~2012-03-19 16:03 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-12 18:56 Shea Levy
2012-03-12 19:00 ` Shea Levy
2012-03-12 22:11 ` H. Peter Anvin
2012-03-12 22:18 ` Shea Levy
2012-03-12 22:23 ` H. Peter Anvin
2012-03-12 22:28 ` Shea Levy
2012-03-17 13:12 ` Shea Levy
2012-03-18 11:21 ` Matt Fleming
2012-03-18 12:10 ` Shea Levy
2012-03-19 8:47 ` Matt Fleming
2012-03-19 15:56 ` Alan Cox
2012-03-19 16:02 ` Shea Levy
2012-03-19 16:03 ` Matt Fleming [this message]
2012-03-20 15:45 ` Maarten Lankhorst
2012-03-20 16:43 ` H. Peter Anvin
[not found] ` <CAOhV88Om7hKHeaGNp-PtFkn=y0T9EBQCbPSBE58vOYQ2+Genew@mail.gmail.com>
2012-03-18 4:29 ` Shea Levy
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