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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Am Wed, May 29, 2024 at 04:47:40PM +0100 schrieb Will Deacon: > On Thu, May 23, 2024 at 10:16:56AM +0200, Alexander Wilhelm wrote: > > Hello ARM64 developers, > > > > I have a kernel panic problem on my ARM64 architecture board but I'm not sure if > > it's a problem in kernel or otherwise. Maybe one could help me. > > > > My problem is the following: I'm using the NXP TQ board with ARM64 architecture > > to run OpenWRT operating system with linux kernel v5.15. The current > > revision of the board (TQMLS1046A-CB.0203) has now a 4GiB RAM instead of 2GiB. > > Therefore I adapted the U-Boot to use the entire memory. But now it leads to > > kernel crash. Interesting is that if I only use 2GiB the problem doesn't occur. > > The memory is splitted up in two different banks. > > > > While analyzing my problem I tried to narrow down the source of my problem. But > > with each new "print message" that should me help to trace the problem I get > > another one. It seems like the error happens unpredictable like due to race > > condition or memory access. Then I tried different RAM sizes something > > in-between like 3GiB. I could boot successfully but then I got errors from > > "swiotlb" if my wireless driver tried to allocate memory from my CMA pool. I > > understand that the error description is vary vague but I give my best to > > explain my problem. Please refer to my log of the current kernel panic state: > > > > Starting kernel ... > > [ 0.000000] Booting Linux on physical CPU 0x0000000000 [0x410fd082] > > [ 0.000000] Linux version 5.15.158 (########@##############) (aarch64-openwrt-linux-gnu-gcc (OpenWrt GCC 12.3.0 r23630-842932a63d) 12.3.0, GNU ld (GNU Binutils) 2.37) #0 SMP Wed May 22 13:15:09 2024 > > [ 0.000000] Machine model: ######### > > [ 0.000000] earlycon: uart8250 at MMIO 0x00000000021c0500 (options '') > > [ 0.000000] printk: bootconsole [uart8250] enabled > > [ 0.000000] Reserved memory: created DMA memory pool at 0x00000008ff800000, size 8 MiB > > [ 0.000000] OF: reserved mem: initialized node qman-fqd, compatible id shared-dma-pool > > [ 0.000000] Reserved memory: created DMA memory pool at 0x00000008fc000000, size 32 MiB > > [ 0.000000] OF: reserved mem: initialized node qman-pfdr, compatible id shared-dma-pool > > [ 0.000000] Reserved memory: created DMA memory pool at 0x00000008fe000000, size 16 MiB > > [ 0.000000] OF: reserved mem: initialized node bman-fbpr, compatible id shared-dma-pool > > [ 0.000000] Zone ranges: > > [ 0.000000] DMA [mem 0x0000000080000000-0x00000000ffffffff] > > [ 0.000000] DMA32 empty > > [ 0.000000] Normal [mem 0x0000000100000000-0x00000008ffffffff] > > [ 0.000000] Movable zone start for each node > > [ 0.000000] Early memory node ranges > > [ 0.000000] node 0: [mem 0x0000000080000000-0x00000000fbdfffff] > > [ 0.000000] node 0: [mem 0x0000000880000000-0x00000008fbffffff] > > [ 0.000000] node 0: [mem 0x00000008fc000000-0x00000008feffffff] > > [ 0.000000] node 0: [mem 0x00000008ff000000-0x00000008ff7fffff] > > [ 0.000000] node 0: [mem 0x00000008ff800000-0x00000008ffffffff] > > [ 0.000000] Initmem setup node 0 [mem 0x0000000080000000-0x00000008ffffffff] > > [ 0.000000] On node 0, zone Normal: 16896 pages in unavailable ranges > > [ 0.000000] cma: Reserved 192 MiB at 0x00000000ee800000 > > [ 0.000000] Failed to find device node for boot cpu > > [ 0.000000] /cpus/cpu@0: missing reg property > > [ 0.000000] /cpus/cpu@1: missing reg property > > [ 0.000000] /cpus/cpu@2: missing reg property > > [ 0.000000] /cpus/cpu@3: missing reg property > > [ 0.000000] Number of cores (5) exceeds configured maximum of 2 - clipping > > [ 0.000000] missing boot CPU MPIDR, not enabling secondaries > > I'd start by fixing this bit ^^^ If the secondary CPUs are spinning > somewhere in memory, maybe that gets allocated by Linux and you end up > with them executing random instructions? > > Will It sounds very much like it. I already suspected that the CPUs were getting in each other's way. Unfortunately I could not reduce the CPUs to 1 in my kernel configuration. For some reason, 2 is the minimum number. If you could give me some tips on how to narrow down the problem, I would appreciate it. Best regards Alexander Wilhelm _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel