linux-kernel - Re: [PATCH v5 2/2] arch/x86: remove pci uart early console from early

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Message-ID: <alpine.DEB.2.11.1506031854570.31424@nanos>
Date:	Wed, 3 Jun 2015 18:55:50 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Bin Gao <bin.gao@...ux.intel.com>
cc:	Ingo Molnar <mingo@...nel.org>, Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>,
	Peter Hurley <peter@...leysoftware.com>,
	Jiri Slaby <jslaby@...e.cz>, Borislav Petkov <bp@...e.de>,
	"Stuart R. Anderson" <stuart.r.anderson@...el.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 2/2] arch/x86: remove pci uart early console from
 early_prink.c

On Tue, 2 Jun 2015, Bin Gao wrote:

> On Tue, Jun 02, 2015 at 11:07:39PM +0200, Thomas Gleixner wrote:
> > What about the memory mapped uarts which have been source of trouble
> > in the past?
> > 
> > Thanks,
> > 
> > 	tglx
> 
> Not sure which specific early console you are referring to.
> Currently we have serial, ttyS, vga, dbgp, xen, efi and pciserial in
> arch/x86/kernel/early_printk.c, and only pciserial is memory mapped
> (but it's being removed).

Removed? So you kill the only way to get early serial output on
certain machines?
 
Thanks,

	tglx
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