crypto: tcrypt - avoid mapping from module image addresses
The output buffer in test_ahash_speed will point to an address located
within the tcrypt module image.
This causes problems when trying to DMA map the buffer.
For e.g. on ARM-based LS1021A, a page fault occurs within the
DMA API when trying to access the struct page returned by
virt_to_page(output):
insmod tcrypt.ko mode=403
testing speed of async sha1 (sha1-caam)
test 0 ( 16 byte blocks, 16 bytes per update, 1 updates):
Unable to handle kernel paging request at virtual address
f07e9080
pgd =
e58d0e00
[
f07e9080] *pgd=
80000080007003, *pmd=
00000000
Internal error: Oops: 206 [#1] SMP THUMB2
Modules linked in: tcrypt(+)
CPU: 1 PID: 1119 Comm: insmod Not tainted 4.2.0-rc1-256134-gbf433416e675 #1
Hardware name: Freescale LS1021A
task:
ea063900 ti:
e5a34000 task.ti:
e5a34000
PC is at dma_cache_maint_page+0x38/0xd0
LR is at __dma_page_cpu_to_dev+0x15/0x64
pc : [<
800155a0>] lr : [<
8001564d>] psr:
000f0033
sp :
e5a35ca0 ip :
8063df00 fp :
f07e9080
r10:
00000cd0 r9 :
8063df00 r8 :
805a2f04
r7 :
0017f804 r6 :
00000002 r5 :
ee7f9000 r4 :
00000014
r3 :
80612d40 r2 :
01ff0080 r1 :
00000380 r0 :
ee7f9000
Flags: nzcv IRQs on FIQs on Mode SVC_32 ISA Thumb Segment user
Control:
70c5387d Table:
e58d0e00 DAC:
9b7ede70
Process insmod (pid: 1119, stack limit = 0xe5a34210)
Stack: (0xe5a35ca0 to 0xe5a36000)
[...]
[<
800155a0>] (dma_cache_maint_page) from [<
8001564d>] (__dma_page_cpu_to_dev+0x15/0x64)
[<
8001564d>] (__dma_page_cpu_to_dev) from [<
800156eb>] (arm_dma_map_page+0x1f/0x44)
[<
800156eb>] (arm_dma_map_page) from [<
802935e3>] (ahash_digest+0x35f/0x510)
[<
802935e3>] (ahash_digest) from [<
7f800d03>] (test_ahash_speed.constprop.6+0x24a/0x4e4 [tcrypt])
[<
7f800d03>] (test_ahash_speed.constprop.6 [tcrypt]) from [<
7f802fd5>] (do_test+0x1898/0x2058 [tcrypt])
[<
7f802fd5>] (do_test [tcrypt]) from [<
7f80802f>] (tcrypt_mod_init+0x2e/0x63 [tcrypt])
[<
7f80802f>] (tcrypt_mod_init [tcrypt]) from [<
80009517>] (do_one_initcall+0xb3/0x134)
[<
80009517>] (do_one_initcall) from [<
80351ec7>] (do_init_module+0x3b/0x13c)
[<
80351ec7>] (do_init_module) from [<
8005cc3f>] (load_module+0x97b/0x9dc)
[<
8005cc3f>] (load_module) from [<
8005cd8d>] (SyS_finit_module+0x35/0x3e)
[<
8005cd8d>] (SyS_finit_module) from [<
8000d101>] (ret_fast_syscall+0x1/0x4c)
Code: 1aba 0152 eb00 0b02 (5882) 0f92
addr2line -f -i -e vmlinux
800155a0
page_zonenum
include/linux/mm.h:728
page_zone
include/linux/mm.h:881
dma_cache_maint_page
arch/arm/mm/dma-mapping.c:822
Signed-off-by: Horia Geant? <horia.geanta@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>