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Wed, 10 Dec 2025 11:57:17 +0000 (GMT) Date: Wed, 10 Dec 2025 17:27:10 +0530 From: Gautam Menghani To: Christian Zigotzky Cc: linuxppc-dev , "R.T.Dickinson" , mad skateman , Christian Zigotzky Subject: Re: [PPC] [e5500] Boot issues after the PowerPC updates 6.19-1 Message-ID: References: X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-TM-AS-GCONF: 00 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMjA2MDAyMCBTYWx0ZWRfX1seq6BPjjnOk XtqxmPqzzDReAQSCZ9vUZBE+VpO/vJhXtuuDkbm+5v8jCrsUAclJLR7VsDWQq77kpUDAH88oCr9 3Fo0xXNbV+jbyB0FC40FrIRyYx9W6PLREyJjUPu7aalW0U12Dz6Uff/KmKhaEqu69vass9jgewW OHxbKWT6sVwqTG00Ywgk/VzhSWjhteo88KhzR6wiFraWndWbri1t8EOfVMKGmPPve6WlVPPd31O WYVlipmQzfV2MyGtzazEIt9P3TEGSwTrZs8DnJhZioTfqR/WOqkVj/wuKn+SLglW791kah52ib2 AzWrlcIWzLiQbRCi4GaKnC8GCYvtHshpyQEEWB/0clvUEwFXnbxfxUcrwAqLCQNhH69y7H4TazS 16bibDCuVZX+tEvu89npmGyI6Udj/g== X-Authority-Analysis: v=2.4 cv=S/DUAYsP c=1 sm=1 tr=0 ts=69396021 cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17 a=IkcTkHD0fZMA:10 a=wP3pNCr1ah4A:10 a=VkNPw1HP01LnGYTKEx00:22 a=VnNF1IyMAAAA:8 a=jhone-cy8azpxuG5v6IA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 X-Proofpoint-ORIG-GUID: hsCeQXNyWKgHmXZX5S_vRVPlUi0HULZg X-Proofpoint-GUID: 4F5emLI9DMBR_WljzMrFS_TNtKNbbFGo X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-12-09_05,2025-12-09_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 phishscore=0 clxscore=1015 impostorscore=0 suspectscore=0 lowpriorityscore=0 adultscore=0 spamscore=0 bulkscore=0 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2510240000 definitions=main-2512060020 On Tue, Dec 09, 2025 at 09:34:11AM +0100, Christian Zigotzky wrote: > > > > On 09 December 2025 at 07:01 am, Gautam Menghani wrote: > > > > On Mon, Dec 08, 2025 at 07:06:14AM +0100, Christian Zigotzky wrote: > >> > >>>> On 08 December 2025 at 06:51 am, Gautam Menghani wrote: > >>> > >>> Hi Christian, > >>> > >>> Thanks for the report. Can you also please share the QEMU command line > >>> you were using? That would be helpful. > >>> > >>> Thanks, > >>> Gautam > >> > >> Hi Gautam, > >> > >> Here is the command line: > >> > >> qemu-system-ppc64 -M ppce500 -cpu e5500 -m 1024 -kernel uImage -drive format=raw,file=void-live-powerpc-20230317.img,index=0,if=virtio -netdev user,id=mynet0 -device virtio-net,netdev=mynet0 -append "rw root=/dev/vda" -device virtio-gpu-pci -device virtio-mouse-pci -device virtio-keyboard-pci -device pci-ohci,id=newusb -audiodev id=sndbe,driver=pa,server=/run/user/1000/pulse/native -device usb-audio,bus=newusb.0 -enable-kvm -smp 4 -fsdev local,security_model=passthrough,id=fsdev0,path=/home/amigaone/Music -device virtio-9p-pci,id=fs0,fsdev=fsdev0,mount_tag=hostshare -display gtk > > > > > > Were you running a KVM guest? Did you see the problem with the latest > > kernel installed in the guest? > > Yes, the latest git kernel doesn’t boot. > > But the final kernel 6.18.0 boots without any problems. I tried booting a TCG ppce500 guest with your config and I can see that the commit 2997876c4a1a5 causes a boot failure. Reverting it works fine. Command line used: qemu-system-ppc64 -M ppce500 -cpu e5500 -smp 1 -m 4G \ -display none -serial stdio \ -kernel /home/gautam/src/linux/arch/powerpc/boot/uImage \ -drive file=/home/gautam/src/qemu-ppc-boot/buildroot/qemu_ppc64_e5500-latest/rootfs.ext2,if=virtio,format=raw \ -append "console=ttyS0 rootwait root=/dev/vda" \ But I was not able to boot a KVM guest on top of this TCG guest. I even went back all the way to 5.15 ./qemu-system-ppc64 \ -M ppce500 -cpu e5500 \ --enable-kvm \ -m 1024 -kernel uImage \ -drive file=/tmp/rootfs.ext2,if=virtio,format=raw \ -append "console=ttyS0 rootwait root=/dev/vda" -serial mon:stdio -nographic Bad kernel stack pointer fffff8 at 0 Oops: Bad kernel stack pointer, sig: 6 [#1] BE PAGE_SIZE=4K SMP NR_CPUS=4 QEMU e500 Modules linked in: CPU: 0 UID: 0 PID: 1508 Comm: qemu-system-ppc Not tainted 6.18.0-a4-powerpc64-smp #45 VOLUNTARY Hardware name: QEMU ppce500 e5500 0x80240020 QEMU e500 NIP: 0000000000000000 LR: 0000000000000000 CTR: 0000000000000000 REGS: c00000003fffbd20 TRAP: 0400 Not tainted (6.18.0-a4-powerpc64-smp) MSR: 0000000010000000 <> CR: 00000000 XER: 00000000 IRQMASK: 0 GPR00: 0000000000000000 0000000000fffff8 0000000000000000 0000000002c00000 GPR04: 0000000000000000 0000000000000000 0000000045504150 0000000004000000 GPR08: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 GPR12: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 GPR20: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 GPR24: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 GPR28: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 NIP [0000000000000000] 0x0 LR [0000000000000000] 0x0 Call Trace: Code: XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX ---[ end trace 0000000000000000 ]--- note: qemu-system-ppc[1508] exited with irqs disabled Thanks, Gautam