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author | Horia Geantă <horia.geanta@nxp.com> | 2019-06-04 12:57:20 +0300 |
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committer | Daniel Thompson <daniel@redfelineninja.org.uk> | 2019-09-17 16:03:04 +0100 |
commit | 492ac1b512d62fe7efc315711bfdeadc5b7a0bc4 (patch) | |
tree | 1d95c6138d6f3cc23c7b3a2669206b3fe00dabbb /.get_maintainer.ignore | |
parent | 92dd2ca4e41bf20bd6b68c535c7cf9f037400390 (diff) |
crypto: caam - fix concurrency issue in givencrypt descriptor
IV transfer from ofifo to class2 (set up at [29][30]) is not guaranteed
to be scheduled before the data transfer from ofifo to external memory
(set up at [38]:
[29] 10FA0004 ld: ind-nfifo (len=4) imm
[30] 81F00010 <nfifo_entry: ofifo->class2 type=msg len=16>
[31] 14820004 ld: ccb2-datasz len=4 offs=0 imm
[32] 00000010 data:0x00000010
[33] 8210010D operation: cls1-op aes cbc init-final enc
[34] A8080B04 math: (seqin + math0)->vseqout len=4
[35] 28000010 seqfifold: skip len=16
[36] A8080A04 math: (seqin + math0)->vseqin len=4
[37] 2F1E0000 seqfifold: both msg1->2-last2-last1 len=vseqinsz
[38] 69300000 seqfifostr: msg len=vseqoutsz
[39] 5C20000C seqstr: ccb2 ctx len=12 offs=0
If ofifo -> external memory transfer happens first, DECO will hang
(issuing a Watchdog Timeout error, if WDOG is enabled) waiting for
data availability in ofifo for the ofifo -> c2 ififo transfer.
Make sure IV transfer happens first by waiting for all CAAM internal
transfers to end before running [38].
New descriptor with jump command inserted at [38]:
[..]
[37] 2F1E0000 seqfifold: both msg1->2-last2-last1 len=vseqinsz
[38] A1000401 jump: jsl1 all-match[!nfifopend] offset=[01] local->[39]
[39] 69300000 seqfifostr: msg len=vseqoutsz
[40] 5C20000C seqstr: ccb2 ctx len=12 offs=0
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Diffstat (limited to '.get_maintainer.ignore')
0 files changed, 0 insertions, 0 deletions