linux-kernel - Re: [PATCH 3/4] sparc: fix accurate exception reporting in copy_{from_to}

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Message-ID: <129fc4699cb74035813b199651282e741c8838cc.camel@physik.fu-berlin.de>
Date: Fri, 05 Sep 2025 11:02:07 +0200
From: John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>
To: Andreas Larsson <andreas@...sler.com>, Rene Rebe <rene@...ctcode.com>, 
	kernel@...rcher.dialup.fu-berlin.de
Cc: linux-kernel@...r.kernel.org, sparclinux@...r.kernel.org, 
	anthony.yznaga@...cle.com
Subject: Re: [PATCH 3/4] sparc: fix accurate exception reporting in
 copy_{from_to}_user for Niagara

Hi,

On Fri, 2025-09-05 at 10:04 +0200, Andreas Larsson wrote:
> On 2025-09-02 18:47, John Paul Adrian Glaubitz wrote:
> > On Tue, 2025-09-02 at 18:40 +0200, Rene Rebe wrote:
> > > From: Michael Karcher <kernel@...rcher.dialup.fu-berlin.de>
> > > 
> > > > Fixes: 7ae3aaf53f16 ("sparc64: Convert NGcopy_{from,to}_user to accurate exception reporting.")
> > > > Signed-off-by: Michael Karcher <kernel@...rcher.dialup.fu-berlin.de>
> > > 
> > > Tested-by: René Rebe <rene@...ctcode.com> # UltraSparc T4 SPARC T4-1 Server
> > 
> > Thanks for the testing! However, this actually needs to be tested on a SPARC T1
> > as both T2 and T4 have their own implementation that is being used. Testing on a
> > T4 will therefore not invoke this particular code unless you modify the kernel in
> > head_64.S to employ the Niagara 1 code on Niagara 4.
> 
> Did you have the fourth patch, that is for Niagara 4, applied as well
> when you did this testing? If so, we could add your Tested-by to that
> patch instead.

I just talked to Rene in person and he confirmed that he applied all patches and
tested on SPARC T4. Thus, please add his Tested-by to the Niagara 4 patch as:

Tested-by: René Rebe <rene@...ctcode.com> # on Oracle SPARC T4-1

(also, to be consistent with my tag, we tested on the same model).

Adrian

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer
`. `'   Physicist
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