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From: Scott Wood <scottwood@freescale.com>
To: Joakim Tjernlund <joakim.tjernlund@transmode.se>
Cc: Wood Scott-B07421 <B07421@freescale.com>,
	Zang Roy-R61911 <r61911@freescale.com>,
	Bob Cochran <ppc@mindchasers.com>,
	"linuxppc-dev@ozlabs.org" <linuxppc-dev@ozlabs.org>,
	Dan Malek <ppc6dev@digitaldans.com>, Support <support@abatron.ch>
Subject: Re: [RFC] [PATCH] powerpc: Add MSR_DE to MSR_KERNEL
Date: Mon, 24 Jun 2013 19:51:00 -0500	[thread overview]
Message-ID: <20130625005100.GA22976@home.buserror.net> (raw)
In-Reply-To: <OF2715F7FE.447A7381-ONC1257A41.002F433E-C1257A41.002F5BFA@transmode.se>

On Fri, Jul 20, 2012 at 10:37:17AM +0200, Joakim Tjernlund wrote:
> Zang Roy-R61911 <r61911@freescale.com> wrote on 2012/07/20 10:27:52:
> >
> >
> >
> > > -----Original Message-----
> > > From: linuxppc-dev-bounces+tie-fei.zang=freescale.com@lists.ozlabs.org
> > > [mailto:linuxppc-dev-bounces+tie-fei.zang=freescale.com@lists.ozlabs.org]
> > > On Behalf Of Joakim Tjernlund
> > > Sent: Friday, June 01, 2012 6:36 AM
> > > To: Wood Scott-B07421
> > > Cc: linuxppc-dev@ozlabs.org; Dan Malek; Bob Cochran; Support
> > > Subject: Re: [RFC] [PATCH] powerpc: Add MSR_DE to MSR_KERNEL
> > >
> > > It just occurred to me that you guys have this already in your Linux SDK so
> > > it can't be that bad.
> > No. MSR_DE is ONLY added when using CW debug in SDK.
> > Roy
> >
> 
> Yes, and I later found that user space debugging is busted if you turn on MSR_DE in
> kernel.

So, how should we handle the CONFIG_BDI_SWITCH patch?  It seems like it
should at least have a warning in the kconfig help text that it breaks
userspace debugging (to the point of causing a kernel oops if it's
tried).  Or maybe it can deselect CONFIG_PPC_ADV_DEBUG_REGS?

It'd also be nice to keep things like this, that are a consequence of how
external debug works on e500, separate from the Abatron-specific stuff.

-Scott

  reply	other threads:[~2013-06-25  0:51 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-05-30  7:43 [RFC] [PATCH] powerpc: Add MSR_DE to MSR_KERNEL Joakim Tjernlund
2012-05-30  7:59 ` Dan Malek
2012-05-30 12:08   ` Re[2]: " Abatron Support
2012-05-31  9:05     ` Joakim Tjernlund
2012-05-31  9:30       ` Re[4]: " Abatron Support
2012-05-31  9:56         ` Joakim Tjernlund
2012-05-31 17:47           ` Scott Wood
2012-05-31 21:38             ` Joakim Tjernlund
2012-05-31 21:43               ` Scott Wood
2012-05-31 22:14                 ` Joakim Tjernlund
2012-05-31 22:16                   ` Scott Wood
2012-05-31 22:33                     ` Joakim Tjernlund
2012-05-31 22:35                     ` Joakim Tjernlund
2012-07-20  8:27                       ` Zang Roy-R61911
2012-07-20  8:37                         ` Joakim Tjernlund
2013-06-25  0:51                           ` Scott Wood [this message]
2013-06-25  6:00                             ` Joakim Tjernlund
2013-06-26 21:42                               ` Scott Wood
2012-06-01  9:12       ` Re[2]: " Benjamin Herrenschmidt
2012-06-01 10:34         ` Joakim Tjernlund
2012-05-30 13:26 ` Bob Cochran
2012-06-01  9:14   ` Benjamin Herrenschmidt
2012-06-01 10:38     ` Joakim Tjernlund
2012-06-01 16:28     ` Scott Wood
2012-06-01 22:30       ` Benjamin Herrenschmidt
2012-06-01 22:42         ` Scott Wood
2012-06-01 23:24           ` Benjamin Herrenschmidt
2012-06-02 18:29             ` Joakim Tjernlund
2012-06-02 21:21               ` Benjamin Herrenschmidt
2012-06-03  9:20                 ` Joakim Tjernlund
2012-06-04  9:06                 ` Joakim Tjernlund
     [not found]                 ` <OF7810EBD9.B191A242-ONC1257A13.0031E9E3-C1257A13.00320D10@LocalDomain>
2012-07-11 14:24                   ` Joakim Tjernlund
2012-07-11 14:45                     ` Kumar Gala

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