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Fri, 3 May 2024 03:15:58 +0000 (GMT) Received: from jarvis.ozlabs.ibm.com (unknown [9.36.16.46]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.au.ibm.com (Postfix) with ESMTPSA id 9BF5D6013D; Fri, 3 May 2024 13:15:52 +1000 (AEST) Message-ID: <33cf08b4fe751af156b1a7c17f69a0ca37dc5eed.camel@linux.ibm.com> Subject: Re: [PATCH 2/2] MAINTAINERS: Make cxl obsolete From: Andrew Donnellan To: Michael Ellerman , linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org Date: Fri, 03 May 2024 13:15:42 +1000 In-Reply-To: <87bk6jb17s.fsf@mail.lhotse> References: <20240409031027.41587-1-ajd@linux.ibm.com> <20240409031027.41587-2-ajd@linux.ibm.com> <87bk6jb17s.fsf@mail.lhotse> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.52.1 (3.52.1-1.fc40) MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: rQH_kHX4eTTFmHxf5Hj-M8yOj7YKSTE3 X-Proofpoint-ORIG-GUID: rQH_kHX4eTTFmHxf5Hj-M8yOj7YKSTE3 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1011,Hydra:6.0.650,FMLib:17.11.176.26 definitions=2024-05-03_01,2024-05-02_03,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 clxscore=1011 phishscore=0 malwarescore=0 suspectscore=0 adultscore=0 mlxscore=0 impostorscore=0 spamscore=0 bulkscore=0 lowpriorityscore=0 mlxlogscore=768 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2404010000 definitions=main-2405030021 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: fbarrat@linux.ibm.com, ukrishn@linux.ibm.com, manoj@linux.ibm.com Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Tue, 2024-04-09 at 14:37 +1000, Michael Ellerman wrote: >=20 > Something like the patch below. Anyone who has an existing config and > runs oldconfig will get a prompt, eg: >=20 > =C2=A0 Deprecated support for IBM Coherent Accelerators (CXL) > (DEPRECATED_CXL) [N/m/y/?] (NEW) >=20 > Folks who just use defconfig etc. won't notice any change which is a > pity. We could also change the default to n, but that risks breaking > someone's machine. Maybe we do that in a another releases time. >=20 > cheers >=20 > diff --git a/drivers/misc/cxl/Kconfig b/drivers/misc/cxl/Kconfig > index 5efc4151bf58..e3fd3fcaf62a 100644 > --- a/drivers/misc/cxl/Kconfig > +++ b/drivers/misc/cxl/Kconfig > @@ -9,11 +9,18 @@ config CXL_BASE > =C2=A0 select PPC_64S_HASH_MMU > =C2=A0 > =C2=A0config CXL > - tristate "Support for IBM Coherent Accelerators (CXL)" > + def_bool y > + depends on DEPRECATED_CXL > + > +config DEPRECATED_CXL > + tristate "Deprecated support for IBM Coherent Accelerators > (CXL)" This doesn't seem quite right to me, I don't think we can just redefine CONFIG_CXL as a bool, but I'll do something like this. Probably won't bother for CXLFLASH since they'll see it for CXL anyway, but I might add a warning message on probe to both drivers. > =C2=A0 depends on PPC_POWERNV && PCI_MSI && EEH > =C2=A0 select CXL_BASE > =C2=A0 default m > =C2=A0 help > + =C2=A0 The cxl driver is no longer actively maintained and we > intend to > + =C2=A0 remove it in a future kernel release. > + > =C2=A0 =C2=A0 Select this option to enable driver support for IBM > Coherent > =C2=A0 =C2=A0 Accelerators (CXL).=C2=A0 CXL is otherwise known as Coheren= t > Accelerator > =C2=A0 =C2=A0 Processor Interface (CAPI).=C2=A0 CAPI allows accelerators = in > FPGAs to be --=20 Andrew Donnellan OzLabs, ADL Canberra ajd@linux.ibm.com IBM Australia Limited