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.
[ 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 ]---
