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Tue, 23 Sep 2025 07:40:56 +0000 (GMT) Message-ID: <7188cc7c-4388-488d-b9ed-4ca9be4159cf@linux.ibm.com> Date: Tue, 23 Sep 2025 13:10:54 +0530 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v7 0/2] Deprecate Power8E and Power8NVL To: Aditya Gupta , qemu-ppc@nongnu.org, qemu-devel@nongnu.org Cc: Harsh Prateek Bora , Mahesh J Salgaonkar , Madhavan Srinivasan , =?UTF-8?Q?Philippe_Mathieu-Daud=C3=A9?= , =?UTF-8?Q?C=C3=A9dric_Le_Goater?= , Daniel Henrique Barboza , Nicholas Piggin , anushree.mathur@linux.ibm.com References: <20250607110412.2342511-1-adityag@linux.ibm.com> Content-Language: en-US From: Anushree Mathur In-Reply-To: <20250607110412.2342511-1-adityag@linux.ibm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Authority-Analysis: v=2.4 cv=FrEF/3rq c=1 sm=1 tr=0 ts=68d24f12 cx=c_pps a=5BHTudwdYE3Te8bg5FgnPg==:117 a=5BHTudwdYE3Te8bg5FgnPg==:17 a=IkcTkHD0fZMA:10 a=yJojWOMRYYMA:10 a=VwQbUJbxAAAA:8 a=VnNF1IyMAAAA:8 a=JhCwfkVEemZAe76ZZ40A:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 X-Proofpoint-ORIG-GUID: NiqPC1_LDM84FE_XhjirPoz124jGIoNJ X-Proofpoint-GUID: r_g_sv4UTnDW_G9OsQ1o86EDBwlkqJ8q X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwOTE5MDIyNCBTYWx0ZWRfX7PnnoebKW4I+ APwuz/piRmGIFXLbinRmYvTG2z05AWE5HIQXL69CYO4ybg8uBbsyz1deXo92NcFZ3Z9Kv1+mP/Q Rrv0JBMNFikHS3EAsK2h83x2OIDLLF/UzmbSkmFCukjxSmENWAa7aawnFHuZvJp0JhjzoM+oEEi owez3zF8Gg7sWHAV2Y6yfSsFhldeZGraOPGTx6sy7WvaRSYEus/cljnwR5B5giUWLda6eHFcP5z 5SFBT/1yo4nDJY0H0xne5RBzt9rc3CAcV3DDuIeBcHYzxrWcJbpC2hw0xH1dtET9begXg2EXCyC gZYsuhKfUawAHalF0MiizDL06sTuuynhmK9fKN8xBq2ECIP6JHDFZ+uR/GTV+CvRqmM5GyfJA0c BarCgUU6 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1117,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-09-23_01,2025-09-22_05,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 phishscore=0 priorityscore=1501 malwarescore=0 adultscore=0 clxscore=1011 impostorscore=0 spamscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2507300000 definitions=main-2509190224 Received-SPF: pass client-ip=148.163.158.5; envelope-from=anushree.mathur@linux.ibm.com; helo=mx0b-001b2d01.pphosted.com X-Spam_score_int: -26 X-Spam_score: -2.7 X-Spam_bar: -- X-Spam_report: (-2.7 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On 07/06/25 4:34 PM, Aditya Gupta wrote: > Note: No changes, only change compared to v6 is rebased to upstream > > Power8E and Power8NVL are not maintained, and not useful to qemu, and > upstream skiboot also has removed support till Power8 DD1. > Power8NVL CPU doesn't boot since skiboot v7.0, or following skiboot commit > to be exact: > > commit c5424f683ee3 ("Remove support for POWER8 DD1") > > No direct way to deprecate the pnv chips, a field like deprecation_note > could be added, but felt not needed as the chip will only get used if > the user requests corresponding 8E / 8NVL CPU, which will print > deprecation warning. > > Also, no separate pnv machine for 8E and 8NVL, user has to pass --cpu, > which will throw the deprecation warning. So just deprecating CPUs should > be enough. > > Changelog > ========= > v7: > + rebased to upstream > v6: > + change qemu version from 10.0 to 10.1 in doc > v5 (https://lore.kernel.org/qemu-devel/20250422043843.26115-1-adityag@linux.ibm.com/): > + split into 2 patches, defining macro, and deprecating 8e & 8nvl > v4 (https://lore.kernel.org/qemu-devel/20250330211012.2932258-1-adityag@linux.ibm.com/): > + remove unnecessary 'if' > v3: > + add 'deprecation_note' argument to the POWERPC_DEPRECATED_CPU macro > v2: > + add mention to docs/about/deprecated.rst > + add '(deprecated)' in output of qemu-system-ppc64 --cpu help > > Base Commit: 96215036f47403438c7c7869b7cd419bd7a11f82 > > Aditya Gupta (2): > target/ppc: Introduce macro for deprecating PowerPC CPUs > target/ppc: Deprecate Power8E and Power8NVL > > docs/about/deprecated.rst | 9 +++++++++ > target/ppc/cpu-models.c | 20 +++++++++++++++----- > target/ppc/cpu_init.c | 7 ++++++- > 3 files changed, 30 insertions(+), 6 deletions(-) > > Hi Aditya, I have tested this patch, it is giving proper mention as deprecated for the CPU model Power8E and Power8NVL and  here is my observation: Without the patch it is not showing any cpu-model as deprecated # qemu-system-ppc64 --cpu help | grep power8   power8e_v2.1     PVR 004b0201   power8e          (alias for power8e_v2.1)   power8nvl_v1.0   PVR 004c0100   power8nvl        (alias for power8nvl_v1.0)   power8_v2.0      PVR 004d0200   power8           (alias for power8_v2.0) # qemu-system-ppc64 --cpu help | grep deprecated No output for this After applying the patch # ./qemu-system-ppc64 --cpu help | grep deprecated  power8e_v2.1   PVR 004b0201 (deprecated)  power8nvl_v1.0  PVR 004c0100 (deprecated) # ./qemu-system-ppc64 --cpu help | grep power8   power8e_v2.1     PVR 004b0201 (deprecated)   power8e          (alias for power8e_v2.1)   power8nvl_v1.0   PVR 004c0100 (deprecated)   power8nvl        (alias for power8nvl_v1.0)   power8_v2.0      PVR 004d0200   power8           (alias for power8_v2.0) Tested-by: Anushree Mathur