Hi, Le Mon, 11 Dec 2017 20:35:34 +0100, Corentin Labbe <clabbe.montjoie@xxxxxxxxx> a écrit : > On Mon, Dec 11, 2017 at 08:49:57AM +0100, Mylène Josserand wrote: > > Hello everyone, > > > > This series adds SMP support for Allwinner Sun8i-a83t > > with MCPM (Multi-Cluster Power Management). > > Series information: > > - Based on last linux-next (next-20171211) > > - Had dependencies on Chen Yu's patch that add MCPM > > support: > > https://patchwork.kernel.org/patch/6402801/ > > > > Patch 01: Convert the mcpm driver (initially for A80) to be able > > to use it for A83T. This SoC has a bit flip that needs to be > > handled. Patch 02: Add registers nodes (prcm, cpucfg and r_cpucfg) > > needed for MCPM. > > Patch 03: Add CCI-400 node for a83t. > > Patch 04: Fix the use of virtual timers that hangs the kernel in > > case of SMP support. > > > > If you have any remarks/questions, let me know. > > Thank you in advance, > > Mylène > > > > Hello > > As we discussed in private, Chen Yu's patch should be added in your > series. > > Furthermore, MCPM is not automaticaly selected via imply. > > With all patchs I hit a bug: > [ 0.898668] BUG: sleeping function called from invalid context at > kernel/locking/mutex.c:238 [ 0.911162] in_atomic(): 1, > irqs_disabled(): 0, pid: 1, name: swapper/0 [ 0.917776] CPU: 0 > PID: 1 Comm: swapper/0 Not tainted 4.15.0-rc2-next-20171211+ #73 > [ 0.925418] Hardware name: Allwinner sun8i Family [ 0.930118] > Backtrace: [ 0.932596] [<c010cc50>] (dump_backtrace) from > [<c010cf0c>] (show_stack+0x18/0x1c) [ 0.940158] r7:c0b261e4 > r6:60000013 r5:00000000 r4:c0b51958 [ 0.945820] [<c010cef4>] > (show_stack) from [<c06baccc>] (dump_stack+0x8c/0xa0) [ 0.953045] > [<c06bac40>] (dump_stack) from [<c0149d40>] > (___might_sleep+0x150/0x170) [ 0.960779] r7:c0b261e4 r6:00000000 > r5:000000ee r4:ee844000 [ 0.966437] [<c0149bf0>] (___might_sleep) > from [<c0149dc8>] (__might_sleep+0x68/0xa0) [ 0.974253] > r4:c0861690 [ 0.976796] [<c0149d60>] (__might_sleep) from > [<c06d2918>] (mutex_lock+0x24/0x68) [ 0.984269] r6:c0892f6c > r5:ffffffff r4:c0b1bb24 [ 0.988891] [<c06d28f4>] (mutex_lock) from > [<c01ccb6c>] (perf_pmu_register+0x24/0x3e4) [ 0.996795] > r5:ffffffff r4:ee98b014 [ 1.000375] [<c01ccb48>] > (perf_pmu_register) from [<c03efabc>] (cci_pmu_probe+0x340/0x484) > [ 1.008631] r10:c0892f6c r9:c0bfd5f0 r8:eea19010 r7:c0b261e4 > r6:c0b26240 r5:eea19000 [ 1.016447] r4:ee98b010 [ 1.018989] > [<c03ef77c>] (cci_pmu_probe) from [<c045e21c>] > (platform_drv_probe+0x58/0xb8) [ 1.027158] r10:00000000 > r9:c0b2610c r8:00000000 r7:fffffdfb r6:c0b2610c r5:ffffffed > [ 1.034974] r4:eea19010 [ 1.037511] [<c045e1c4>] > (platform_drv_probe) from [<c045c984>] > (driver_probe_device+0x254/0x330) [ 1.046371] r7:00000000 > r6:c0bff498 r5:c0bff494 r4:eea19010 [ 1.052026] [<c045c730>] > (driver_probe_device) from [<c045cbc4>] > (__device_attach_driver+0xa0/0xd4) [ 1.061062] r10:00000000 > r9:c0bff470 r8:00000000 r7:00000001 r6:eea19010 r5:ee845ac0 > [ 1.068879] r4:c0b2610c r3:00000000 [ 1.072454] [<c045cb24>] > (__device_attach_driver) from [<c045ad68>] > (bus_for_each_drv+0x68/0x9c) [ 1.081228] r7:00000001 r6:c045cb24 > r5:ee845ac0 r4:00000000 [ 1.086883] [<c045ad00>] > (bus_for_each_drv) from [<c045c60c>] (__device_attach+0xb8/0x11c) > [ 1.095135] r6:c0b3e848 r5:eea19044 r4:eea19010 [ 1.099750] > [<c045c554>] (__device_attach) from [<c045cc44>] > (device_initial_probe+0x14/0x18) [ 1.108263] r7:c0b0a4c8 > r6:c0b3e848 r5:eea19010 r4:eea19018 [ 1.113919] [<c045cc30>] > (device_initial_probe) from [<c045bb58>] (bus_probe_device+0x8c/0x94) > [ 1.122523] [<c045bacc>] (bus_probe_device) from [<c0459db8>] > (device_add+0x40c/0x5a0) [ 1.130429] r7:c0b0a4c8 r6:eea19010 > r5:eea18a10 r4:eea19018 [ 1.136089] [<c04599ac>] (device_add) from > [<c0582a58>] (of_device_add+0x3c/0x44) [ 1.143564] r10:00000000 > r9:00000000 r8:00000000 r7:eedf21a4 r6:eea18a10 r5:00000000 > [ 1.151380] r4:eea19000 [ 1.153915] [<c0582a1c>] > (of_device_add) from [<c0582f80>] > (of_platform_device_create_pdata+0x7c/0xac) [ 1.163210] > [<c0582f04>] (of_platform_device_create_pdata) from [<c0583100>] > (of_platform_bus_create+0xf4/0x1f0) [ 1.173372] r9:00000000 > r8:00000000 r7:00000001 r6:00000000 r5:eedf2154 r4:00000000 > [ 1.181107] [<c058300c>] (of_platform_bus_create) from > [<c0583374>] (of_platform_populate+0x74/0xd4) [ 1.190229] > r10:00000001 r9:eea18a10 r8:00000000 r7:00000000 r6:00000000 > r5:eedf1d04 [ 1.198045] r4:eedf2154 [ 1.200580] [<c0583300>] > (of_platform_populate) from [<c03ef2a8>] > (cci_platform_probe+0x3c/0x54) [ 1.209356] r10:00000000 > r9:c0b26168 r8:00000000 r7:fffffdfb r6:c0b26168 r5:ffffffed > [ 1.217172] r4:eea18a00 [ 1.219708] [<c03ef26c>] > (cci_platform_probe) from [<c045e21c>] (platform_drv_probe+0x58/0xb8) > [ 1.228306] r5:ffffffed r4:eea18a10 [ 1.231881] [<c045e1c4>] > (platform_drv_probe) from [<c045c984>] > (driver_probe_device+0x254/0x330) [ 1.240742] r7:00000000 > r6:c0bff498 r5:c0bff494 r4:eea18a10 [ 1.246397] [<c045c730>] > (driver_probe_device) from [<c045cbc4>] > (__device_attach_driver+0xa0/0xd4) [ 1.255433] r10:00000000 > r9:c0bff470 r8:00000000 r7:00000001 r6:eea18a10 r5:ee845ce8 > [ 1.263250] r4:c0b26168 r3:00000000 [ 1.266825] [<c045cb24>] > (__device_attach_driver) from [<c045ad68>] > (bus_for_each_drv+0x68/0x9c) [ 1.275598] r7:00000001 r6:c045cb24 > r5:ee845ce8 r4:00000000 [ 1.281253] [<c045ad00>] > (bus_for_each_drv) from [<c045c60c>] (__device_attach+0xb8/0x11c) > [ 1.289506] r6:c0b3e848 r5:eea18a44 r4:eea18a10 [ 1.294120] > [<c045c554>] (__device_attach) from [<c045cc44>] > (device_initial_probe+0x14/0x18) [ 1.302633] r7:c0b0a4c8 > r6:c0b3e848 r5:eea18a10 r4:eea18a18 [ 1.308288] [<c045cc30>] > (device_initial_probe) from [<c045bb58>] (bus_probe_device+0x8c/0x94) > [ 1.316890] [<c045bacc>] (bus_probe_device) from [<c0459db8>] > (device_add+0x40c/0x5a0) [ 1.324796] r7:c0b0a4c8 r6:eea18a10 > r5:ee993810 r4:eea18a18 [ 1.330450] [<c04599ac>] (device_add) from > [<c0582a58>] (of_device_add+0x3c/0x44) [ 1.337926] r10:00000000 > r9:c07759d8 r8:00000000 r7:eedf1d54 r6:ee993810 r5:00000000 > [ 1.345743] r4:eea18a00 [ 1.348277] [<c0582a1c>] > (of_device_add) from [<c0582f80>] > (of_platform_device_create_pdata+0x7c/0xac) [ 1.357572] > [<c0582f04>] (of_platform_device_create_pdata) from [<c0583100>] > (of_platform_bus_create+0xf4/0x1f0) [ 1.367734] r9:c07759d8 > r8:00000000 r7:00000001 r6:00000000 r5:eedf1d04 r4:00000000 > [ 1.375469] [<c058300c>] (of_platform_bus_create) from > [<c058315c>] (of_platform_bus_create+0x150/0x1f0) [ 1.384938] > r10:ee993810 r9:c07759d8 r8:00000000 r7:00000001 r6:00000000 > r5:eedefe1c [ 1.392754] r4:eedf1d04 [ 1.395289] [<c058300c>] > (of_platform_bus_create) from [<c0583374>] > (of_platform_populate+0x74/0xd4) [ 1.404411] r10:00000001 > r9:00000000 r8:00000000 r7:c07759d8 r6:00000000 r5:eedee844 > [ 1.412228] r4:eedefe1c [ 1.414769] [<c0583300>] > (of_platform_populate) from [<c0a25ee8>] > (of_platform_default_populate_init+0x80/0x94) [ 1.424844] > r10:c0a37848 r9:00000000 r8:c0b59680 r7:c0a37834 r6:ffffe000 > r5:c0775ce8 [ 1.432661] r4:00000000 [ 1.435200] [<c0a25e68>] > (of_platform_default_populate_init) from [<c0102794>] > (do_one_initcall+0x5c/0x194) [ 1.444925] r5:c0a25e68 r4:c0b0a4c8 > [ 1.448506] [<c0102738>] (do_one_initcall) from [<c0a00f88>] > (kernel_init_freeable+0x1d4/0x268) [ 1.457195] r9:00000004 > r8:c0b59680 r7:c0a37834 r6:c0b59680 r5:c0a47308 r4:c090cfb8 > [ 1.464932] [<c0a00db4>] (kernel_init_freeable) from [<c06cf3b0>] > (kernel_init+0x10/0x118) [ 1.473187] r10:00000000 r9:00000000 > r8:00000000 r7:00000000 r6:00000000 r5:c06cf3a0 [ 1.481004] > r4:00000000 [ 1.483540] [<c06cf3a0>] (kernel_init) from > [<c01010e8>] (ret_from_fork+0x14/0x2c) [ 1.491098] Exception > stack(0xee845fb0 to 0xee845ff8) [ 1.496146] > 5fa0: 00000000 00000000 00000000 > 00000000 [ 1.504313] 5fc0: 00000000 00000000 00000000 00000000 > 00000000 00000000 00000000 00000000 [ 1.512480] 5fe0: 00000000 > 00000000 00000000 00000000 00000013 00000000 [ 1.519084] > r5:c06cf3a0 r4:00000000 [ 1.522737] ARM CCI_400_r1 PMU driver > probed I have done further tests. I booted a previous kernel that I know it was working fine (kernel v4.13) then, I booted the kernel with this series and it worked just fine. Only after a power cycle, I am able to reproduce the error, otherwise, it is working well. See the boot log of this two tests: http://code.bulix.org/7kr0e0-239697?raw So I really tested this series but I did not do any power-cycle between my tests (only reboots). I will investigate on it. Best regards, -- Mylène Josserand, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
