linux-kernel - Re: Live patching for powerpc

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Message-ID: <1460714506.22415.0.camel@ellerman.id.au>
Date:	Fri, 15 Apr 2016 20:01:46 +1000
From:	Michael Ellerman <mpe@...erman.id.au>
To:	Miroslav Benes <mbenes@...e.cz>, Jessica Yu <jeyu@...hat.com>
Cc:	linuxppc-dev@...abs.org, bsingharora@...il.com, duwe@....de,
	linux-kernel@...r.kernel.org, rostedt@...dmis.org,
	kamalesh@...ux.vnet.ibm.com, pmladek@...e.com, jikos@...nel.org,
	live-patching@...r.kernel.org
Subject: Re: Live patching for powerpc

On Fri, 2016-04-15 at 10:28 +0200, Miroslav Benes wrote:
> On Thu, 14 Apr 2016, Jessica Yu wrote:
> > For the 32-bit module code, I don't believe we would need to preserve
> > the .init.plt section for livepatch's call to apply_relocate_add(),
> > since relocations to init sections should've been applied during
> > module initialization, and we don't patch those types of functions.
> > Please correct me if my understanding is off.
> 
> I think you are right, but I also think we don't have to worry about 
> 32-bit powerpc anyway. This patch set supports ppc64le only so we can 
> leave it for now.

Yep. Who ever wants to do 32-bit live patch support can cross that bridge when
they come to it.

cheers