On 6/8/2016 03:48AM, Christophe Leroy <christophe.le...@c-s.fr> wrote :
> -----Original Message----- > From: Christophe Leroy [mailto:christophe.le...@c-s.fr] > Sent: Saturday, August 06, 2016 12:59 AM > To: Zhao Qiang <qiang.z...@freescale.com>; lau...@codeaurora.org > Cc: catalin.mari...@arm.com; linux-kernel@vger.kernel.org; Scott Wood > <o...@buserror.net>; o...@lixom.net; a...@linux-foundation.org; linuxppc- > d...@lists.ozlabs.org; x....@freescale.com > Subject: Re: [PATCH v13 3/6] CPM/QE: use genalloc to manage CPM/QE muram > > > > Le 30/11/2015 à 03:48, Zhao Qiang a écrit : > > Use genalloc to manage CPM/QE muram instead of rheap. > > > > Signed-off-by: Zhao Qiang <qiang.z...@freescale.com> > > --- > > Changes for v9: > > - splitted from patch 3/5, modify cpm muram management functions. > > Changes for v10: > > - modify cpm muram first, then move to qe_common > > - modify commit. > > Changes for v11: > > - factor out the common alloc code > > - modify min_alloc_order to zero for cpm_muram_alloc_fixed. > > Changes for v12: > > - Nil > > Changes for v13: > > - rebase > > > > arch/powerpc/include/asm/cpm.h | 3 + > > arch/powerpc/platforms/Kconfig | 4 +- > > arch/powerpc/sysdev/cpm_common.c | 126 > +++++++++++++++++++++++++++------------ > > lib/genalloc.c | 2 +- > > 4 files changed, 94 insertions(+), 41 deletions(-) > > > > With that patch applied, I get the following Oops on a 8xx (Which has a CPM1). > > cpm_muram_init() is called from setup_arch() > > It seems that gen_pool_add() tries to kmalloc() memory but the SLAB is not > available yet. > Thank you for your comments, I can't find a 8xx board, would you like to test the patch Attached on your board? > [ 0.000000] Unable to handle kernel paging request for data at > address 0x00000008 > [ 0.000000] Faulting instruction address: 0xc01acce0 > [ 0.000000] Oops: Kernel access of bad area, sig: 11 [#1] > [ 0.000000] PREEMPT CMPC885 > [ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted > 4.4.14-s3k-dev-g0886ed8-svn #5 > [ 0.000000] task: c05183e0 ti: c0536000 task.ti: c0536000 > [ 0.000000] NIP: c01acce0 LR: c0011068 CTR: 00000000 > [ 0.000000] REGS: c0537e50 TRAP: 0300 Not tainted > (4.4.14-s3k-dev-g0886ed8-svn) > [ 0.000000] MSR: 00001032 <ME,IR,DR,RI> CR: 28044428 XER: 00000000 > [ 0.000000] DAR: 00000008 DSISR: c0000000 > GPR00: c0011068 c0537f00 c05183e0 00000000 00009000 ffffffff 00000bc0 ffffffff > GPR08: ff003000 ff00b000 ff003bbf 00000000 22044422 100d43a8 00000000 > 07ff94e8 > GPR16: 00000000 07bb5d70 00000000 07ff81f4 07ff81f4 07ff81f4 00000000 > 00000000 > GPR24: 07ffb3a0 07fe7628 c0550000 c7ffa190 c0540000 ff003bbf 00000000 > 00000001 > [ 0.000000] NIP [c01acce0] gen_pool_add_virt+0x14/0xdc > [ 0.000000] LR [c0011068] cpm_muram_init+0xd4/0x18c > [ 0.000000] Call Trace: > [ 0.000000] [c0537f00] [00000200] 0x200 (unreliable) > [ 0.000000] [c0537f20] [c0011068] cpm_muram_init+0xd4/0x18c > [ 0.000000] [c0537f70] [c0494684] cpm_reset+0xb4/0xc8 > [ 0.000000] [c0537f90] [c0494c64] cmpc885_setup_arch+0x10/0x30 > [ 0.000000] [c0537fa0] [c0493cd4] setup_arch+0x130/0x168 > [ 0.000000] [c0537fb0] [c04906bc] start_kernel+0x88/0x380 > [ 0.000000] [c0537ff0] [c0002224] start_here+0x38/0x98 > [ 0.000000] Instruction dump: > [ 0.000000] 91430010 91430014 80010014 83e1000c 7c0803a6 38210010 > 4e800020 7c0802a6 > [ 0.000000] 9421ffe0 bf61000c 90010024 7c7e1b78 <80630008> 7c9c2378 > 7cc31c30 3863001f > [ 0.000000] ---[ end trace dc8fa200cb88537f ]---
0001-CPM1-use-subsys_initcall-to-init-cpm1.patch
Description: 0001-CPM1-use-subsys_initcall-to-init-cpm1.patch
