From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ozlabs.org (ozlabs.org [IPv6:2401:3900:2:1::2]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 897541A0163 for ; Tue, 8 Sep 2015 20:51:37 +1000 (AEST) Received: from e38.co.us.ibm.com (e38.co.us.ibm.com [32.97.110.159]) (using TLSv1 with cipher CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id AB5D71401AF for ; Tue, 8 Sep 2015 20:51:36 +1000 (AEST) Received: from /spool/local by e38.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 8 Sep 2015 04:51:34 -0600 Received: from b03cxnp08026.gho.boulder.ibm.com (b03cxnp08026.gho.boulder.ibm.com [9.17.130.18]) by d03dlp02.boulder.ibm.com (Postfix) with ESMTP id 2BA373E4003F for ; Tue, 8 Sep 2015 04:51:32 -0600 (MDT) Received: from d03av03.boulder.ibm.com (d03av03.boulder.ibm.com [9.17.195.169]) by b03cxnp08026.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id t88AoiUS41549848 for ; Tue, 8 Sep 2015 03:50:44 -0700 Received: from d03av03.boulder.ibm.com (localhost [127.0.0.1]) by d03av03.boulder.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id t88ApV6N005910 for ; Tue, 8 Sep 2015 04:51:31 -0600 Date: Tue, 8 Sep 2015 16:21:27 +0530 From: Ananth N Mavinakayanahalli To: Michael Ellerman Cc: Scott Wood , linuxppc-dev@ozlabs.org, Paul Mackerras , ego@linux.vnet.ibm.com, mingo@kernel.org Subject: Re: powerpc: Add user-return-notifier support Message-ID: <20150908105127.GB12028@in.ibm.com> Reply-To: ananth@in.ibm.com References: <20150825054110.GD3815@in.ibm.com> <20150831103517.96D1A1401E7@ozlabs.org> <20150901064113.GA1196@in.ibm.com> <1441152192.4966.103.camel@freescale.com> <20150902023713.GB1196@in.ibm.com> <1441164552.4966.153.camel@freescale.com> <20150902050958.GC1196@in.ibm.com> <1441704279.7601.6.camel@ellerman.id.au> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <1441704279.7601.6.camel@ellerman.id.au> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Tue, Sep 08, 2015 at 07:24:39PM +1000, Michael Ellerman wrote: > On Wed, 2015-09-02 at 10:39 +0530, Ananth N Mavinakayanahalli wrote: > > On Tue, Sep 01, 2015 at 10:29:12PM -0500, Scott Wood wrote: > > > > > Why is this selected by KVM on PPC if KVM on PPC doesn't use it? What is the > > > user you're trying to enable? > > > > I copied Paul and Gautham to get their thoughts on whether it is > > something they could use on Power. At this time, apart from enabling the > > feature, I do not have a specific usecase for it. We can park this patch > > pending a real user on powerpc. > > OK, thanks for hashing that out guys. I think parking it is the best solution > for now, we could merge it and disable it somehow, but that would be ugly and > prone to breaking. > > Do we want to do something like this? Yes. This looks fine -- folks who want it down the line know where to look. Thanks, Ananth > > cheers > > diff --git a/Documentation/features/arch-support.txt b/Documentation/features/arch-support.txt > index d22a1095e661..3e2cf6161cf4 100644 > --- a/Documentation/features/arch-support.txt > +++ b/Documentation/features/arch-support.txt > @@ -8,4 +8,5 @@ The meaning of entries in the tables is: > | ok | # feature supported by the architecture > |TODO| # feature not yet supported by the architecture > | .. | # feature cannot be supported by the hardware > + |n/a | # feature is not needed/wanted/meaningful for the architecture > > diff --git a/Documentation/features/debug/user-ret-profiler/arch-support.txt b/Documentation/features/debug/user-ret-profiler/arch-support.txt > index 44cc1ff3f603..669813180dc5 100644 > --- a/Documentation/features/debug/user-ret-profiler/arch-support.txt > +++ b/Documentation/features/debug/user-ret-profiler/arch-support.txt > @@ -27,7 +27,7 @@ > | nios2: | TODO | > | openrisc: | TODO | > | parisc: | TODO | > - | powerpc: | TODO | > + | powerpc: | n/a | # http://lkml.kernel.org/r/20150825054110.GD3815@in.ibm.com > | s390: | TODO | > | score: | TODO | > | sh: | TODO | > >