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Wed, 13 May 2026 07:08:48 +0000 (GMT) Received: from [9.39.28.204] (unknown [9.39.28.204]) by smtpav02.dal12v.mail.ibm.com (Postfix) with ESMTP; Wed, 13 May 2026 07:08:47 +0000 (GMT) Message-ID: <59787cfc-c08f-465b-b66c-1a4537307bf3@linux.ibm.com> Date: Wed, 13 May 2026 12:38:36 +0530 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 0/3] MCE robustness fixes and LKDTM powerpc enhancements From: Sayali Patil To: linuxppc-dev@lists.ozlabs.org, maddy@linux.ibm.com, "Ritesh Harjani (IBM)" , sshegde@linux.ibm.com Cc: linux-kernel@vger.kernel.org, Mahesh Salgaonkar , chleroy@kernel.org References: Content-Language: en-IN In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Authority-Analysis: v=2.4 cv=Us1T8ewB c=1 sm=1 tr=0 ts=6a042386 cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17 a=IkcTkHD0fZMA:10 a=NGcC8JguVDcA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=Y2IxJ9c9Rs8Kov3niI8_:22 a=c92rfblmAAAA:8 a=VnNF1IyMAAAA:8 a=FSmv8dLCCGc-WVpy0bEA:9 a=QEXdDO2ut3YA:10 a=GvGzcOZaWPEFPQC_NcjD:22 X-Proofpoint-GUID: tNgME0BuTSbqN9nByqr2SIgXhjpX6yAf X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTEzMDA3MSBTYWx0ZWRfX6XBwRuiPax7v bWleYpKGWeKkxhoCm7E61DjUXKoPKpjf7MQiZ+6n9dLInZO5r2lhk5Mxl6qDsQ8I2cv6O9RhnHh IubO7eH6KvCyhybWW45wxjTI5Qidz07jVRidDwbZf2D3fFHoyLXgNbIe15Ps8D6ryduK3nwZ/oS Mhwl3LT7wIKdYvNtZEiB1+S84UDWeROVuQ8ZG+H6AFg3u9Gi7DSc+psRFFraD3XYQeNZm66mr76 qvmMpjT+N7Ei2RffV1ZEFV961x3nLyg74I6OP5qnGDDUe5Zd2ktKL8k+vY7rxkwMz9HzZfLLndR BaAF9d5PwP8KDw+JLkUJvyE9JYb07GM01+3nx8N8n2pbHhWa2xSNqNe/prkj4dDWRi7Og5/YHWz D2GGJyOlfjevOaM9EHU4qhjQL9ssMZ/FNcUx21iJiIWiKzb3AWR2Y4xPt6EroJ7uHENhFCF0aeP OrngOpNDZppMKCXalQA== X-Proofpoint-ORIG-GUID: z_vBTsT7t_k4R8xwTkJMKK7D30Yi8H-0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-05-11_05,2026-05-08_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 priorityscore=1501 impostorscore=0 lowpriorityscore=0 bulkscore=0 suspectscore=0 spamscore=0 malwarescore=0 clxscore=1015 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2605050000 definitions=main-2605130071 On 06/05/26 14:36, Sayali Patil wrote: > Hi all, > > This series fixes a panic observed while handling machine check exceptions > (MCEs) from real mode. It also improves the reliability of the > PPC_SLB_MULTIHIT test by adding isync instructions after slbmte operations, > and introduces a new LKDTM trigger (PPC_RADIX_TLBIEL) to validate MCE > behavior on radix MMU. > > Please review the patches and provide any feedback or suggestions > for improvement. > > Thanks, > Sayali > > Sayali Patil (3): > powerpc/time: remove preempt_disable/enable from arch_irq_work_raise() > lkdtm/powerpc: add isync after slbmte to enforce SLB update ordering > lkdtm/powerpc: add PPC_RADIX_TLBIEL test for radix MCE validation > > arch/powerpc/kernel/time.c | 2 -- > drivers/misc/lkdtm/Makefile | 2 +- > drivers/misc/lkdtm/powerpc.c | 44 +++++++++++++++++++++++++ > tools/testing/selftests/lkdtm/tests.txt | 1 + > 4 files changed, 46 insertions(+), 3 deletions(-) > Sashiko has provided some comments (https://sashiko.dev/#/patchset/cover.1778057685.git.sayalip%40linux.ibm.com), so I am planning to split this into two patch series. I will send v2 part 1 today with the proposed change for "powerpc/time: Remove preempt_disable/enable from arch_irq_work_raise()", and v2 part 2 with the remaining two patches later. Thanks for the review, Ritesh and Shrikanth. Regards, Sayali