linux-kernel - Re: x86-32: Early microcode loading stumbles over disabled DYNAMIC

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Message-ID: <20130831050737.GB12617@x1.alien8.de>
Date:	Sat, 31 Aug 2013 07:07:37 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	Jan Kiszka <jan.kiszka@...mens.com>,
	Fenghua Yu <fenghua.yu@...el.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	x86 <x86@...nel.org>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: x86-32: Early microcode loading stumbles over disabled
 DYNAMIC_FTRACE

On Fri, Aug 30, 2013 at 08:17:41PM -0400, Steven Rostedt wrote:
> On Fri, 30 Aug 2013 13:48:55 -0700
> "H. Peter Anvin" <hpa@...or.com> wrote:
> 
> > >> You *could* bail out of the calling address is < PAGE_OFFSET.
> > 
> > Anyway... can we add this to the static tracing code?  It is two
> > instructions and is only needed on x86-32.  For performance, use dynamic.
> 
> Sure, do you want to add it ?

Another, simpler option could be to make static tracing depend on
!MICROCODE until the first has been removed.

-- 
Regards/Gruss,
Boris.
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