On Wed, Mar 15, 2023 at 02:30:53PM +1100, Michael Ellerman wrote: > Andrea Righi <andrea.ri...@canonical.com> writes: > > I'm triggering the following bug when booting my qemu powerpc VM: > > I'm not seeing that here :/ > > Can you give a bit more detail? > - qemu version > - qemu command line > - what userspace are you using? > - full dmesg of the failing case
Yeah, ignore this for now, it could be related to another custom patch that I had applied (and forgot about it sorry), this one: https://lore.kernel.org/lkml/20230119155709.20d87e35.g...@garyguo.net/T/ That is causing other issues on ppc64, so I think it might be related to that, I'll do more tests making sure I use a vanilla kernel. Sorry for the noise. -Andrea > > > event-sources: Unable to request interrupt 23 for > > /event-sources/hot-plug-events > > WARNING: CPU: 0 PID: 1 at arch/powerpc/platforms/pseries/event_sources.c:26 > > request_event_sources_irqs+0xbc/0xf0 > > Modules linked in: > > CPU: 0 PID: 1 Comm: swapper/0 Tainted: G W 6.2.2-kc #1 > > Hardware name: IBM pSeries (emulated by qemu) POWER9 (raw) 0x4e1200 > > 0xf000005 of:SLOF,HEAD pSeries > > NIP: c000000002022eec LR: c000000002022ee8 CTR: 0000000000000000 > > REGS: c000000003483910 TRAP: 0700 Tainted: G W (6.2.2-kc) > > MSR: 8000000002029033 <SF,VEC,EE,ME,IR,DR,RI,LE> CR: 24483200 XER: > > 00000000 > > CFAR: c000000000180838 IRQMASK: 0 > > GPR00: c000000002022ee8 c000000003483bb0 c000000001a5ce00 0000000000000050 > > GPR04: c000000002437d78 c000000002437e28 0000000000000001 0000000000000001 > > GPR08: c000000002437d00 0000000000000001 0000000000000000 0000000044483200 > > GPR12: 0000000000000000 c000000002720000 c000000000012758 0000000000000000 > > GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 > > GPR20: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 > > GPR24: 0000000000000000 c0000000020033fc cccccccccccccccd c0000000000e07f0 > > GPR28: c000000000db0520 0000000000000000 c0000000fff92ac0 0000000000000017 > > NIP [c000000002022eec] request_event_sources_irqs+0xbc/0xf0 > > LR [c000000002022ee8] request_event_sources_irqs+0xb8/0xf0 > > Call Trace: > > [c000000003483bb0] [c000000002022ee8] request_event_sources_irqs+0xb8/0xf0 > > (unreliable) > > [c000000003483c40] [c000000002022fa0] > > __machine_initcall_pseries_init_ras_hotplug_IRQ+0x80/0xb0 > > [c000000003483c70] [c0000000000121b8] do_one_initcall+0x98/0x300 > > [c000000003483d50] [c000000002004b28] kernel_init_freeable+0x2ec/0x370 > > [c000000003483df0] [c000000000012780] kernel_init+0x30/0x190 > > [c000000003483e50] [c00000000000cf5c] ret_from_kernel_thread+0x5c/0x64 > > --- interrupt: 0 at 0x0 > > > > I did a bisect it and it seems that the offending commit is: > > baa49d81a94b ("powerpc/pseries: hvcall stack frame overhead") > > > > Reverting that and also dfecd06bc552 ("powerpc: remove > > STACK_FRAME_OVERHEAD"), because we need to re-introduce > > STACK_FRAME_OVERHEAD, seems to fix everything. > > That function doesn't make a hcall, so presumably there was some earlier > problem which we only detect here. > > cheers
