david.hag...@gmail.com wrote: > OK, using 224 as the MPIC interrupt number, and attempting to map it via > irq_create_mapping(0,224) gives me a kernel seg fault:
This should not be correct without initialing MSI for MPIC host. As I comment on another email, please refer to the file, arch/powerpc/sysdev/fsl_msi.c. -Tiejun > > Unable to handle kernel paging request for data at address 0x00000000 > Faulting instruction address: 0xc0016540 > Oops: Kernel access of bad area, sig: 11 [#1] > PREEMPT SMP NR_CPUS=2 EP8641A > Modules linked in: Endpoint_driver(+) > NIP: c0016540 LR: c0050b38 CTR: c00163b8 > REGS: ef8c1ab0 TRAP: 0300 Not tainted (2.6.26.2-ep1.10) > MSR: 00001032 <ME,IR,DR> CR: 24024482 XER: 00000000 > DAR: 00000000, DSISR: 40000000 > TASK = eedec6a0[60] 'insmod' THREAD: ef8c0000 CPU: 1 > GPR00: 00000000 ef8c1b60 eedec6a0 ffffffea 00000000 00000000 c035c17c > 000000e0 > GPR08: 00400000 00000000 c035c020 00000000 24024422 100a7264 00000000 > 00000095 > GPR16: 00000095 00000000 0000000d 00000124 f102fd98 00000000 c004a4fc > f102c000 > GPR24: 0000001a f1038400 00000000 c031e610 fffffffa 00009032 c031e5e0 > 000000e0 > NIP [c0016540] mpic_set_irq_type+0x188/0x1c4 > LR [c0050b38] set_irq_type+0x84/0xc8 > Call Trace: > [ef8c1b60] [c0050b1c] set_irq_type+0x68/0xc8 (unreliable) > [ef8c1b80] [c001572c] mpic_host_map+0xec/0xf4 > [ef8c1b90] [c00064a0] irq_setup_virq+0x60/0x98 > [ef8c1bb0] [c00065dc] irq_create_mapping+0x104/0x114 > [ef8c1bd0] [f1034798] Endpoint_device_ctor+0x258/0x3b8 [Endpoint_driver] > > Reading the source (since these calls don't seem to have any other > documentation), it *looks* like it ought to be valid to call > irq_create_mapping with a null irq_host *host - which is good, since I > can't see anything obvious that would give me some other irq_host (again, > since none of this seems to be documented anywhere). > > I am assuming the default host used by the system would be correct. > > However, then I get this fault. > > > > _______________________________________________ > Linuxppc-dev mailing list > Linuxppc-dev@lists.ozlabs.org > https://lists.ozlabs.org/listinfo/linuxppc-dev > _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
