The basic scheme of the block mode assembler is that we start by
enabling the FPU, loading the key into the floating point registers,
then iterate calling the encrypt/decrypt routine for each block.
For the 256-bit key cases, we run short on registers in the unrolled
loops.
So the {ENCRYPT,DECRYPT}_256_2() macros reload the key registers that
get clobbered.
The unrolled macros, {ENCRYPT,DECRYPT}_256(), are not mindful of this.
So if we have a mix of multi-block and single-block calls, the
single-block unrolled 256-bit encrypt/decrypt can run with some
of the key registers clobbered.
Handle this by always explicitly loading those registers before using
the non-unrolled 256-bit macro.
This was discovered thanks to all of the new test cases added by
Jussi Kivilinna.
Signed-off-by: David S. Miller <davem@davemloft.net>
Some dm-crypt testing revealed several bugs in the 256-bit unrolled
loops.
The DECRYPT_256_2() macro had two errors:
1) Missing reload of KEY registers %f60 and %f62
2) Missing "\" in penultimate line of definition.
In aes_sparc64_ecb_decrypt_256, we were storing the second half of the
encryption result from the wrong source registers.
In aes_sparc64_ctr_crypt_256 we have to be careful when we fall out of
the 32-byte-at-a-time loop and handle a trailing 16-byte chunk. In
that case we've clobbered the final key holding registers and have to
restore them before executing the ENCRYPT_256() macro. Inside of the
32-byte-at-a-time loop things are OK, because we do this key register
restoring during the first few rounds of the ENCRYPT_256_2() macro.
Signed-off-by: David S. Miller <davem@davemloft.net>
Before:
testing speed of ctr(aes) encryption
test 0 (128 bit key, 16 byte blocks): 1 operation in 206 cycles (16 bytes)
test 1 (128 bit key, 64 byte blocks): 1 operation in 244 cycles (64 bytes)
test 2 (128 bit key, 256 byte blocks): 1 operation in 360 cycles (256 bytes)
test 3 (128 bit key, 1024 byte blocks): 1 operation in 814 cycles (1024 bytes)
test 4 (128 bit key, 8192 byte blocks): 1 operation in 5021 cycles (8192 bytes)
test 5 (192 bit key, 16 byte blocks): 1 operation in 206 cycles (16 bytes)
test 6 (192 bit key, 64 byte blocks): 1 operation in 240 cycles (64 bytes)
test 7 (192 bit key, 256 byte blocks): 1 operation in 378 cycles (256 bytes)
test 8 (192 bit key, 1024 byte blocks): 1 operation in 939 cycles (1024 bytes)
test 9 (192 bit key, 8192 byte blocks): 1 operation in 6395 cycles (8192 bytes)
test 10 (256 bit key, 16 byte blocks): 1 operation in 209 cycles (16 bytes)
test 11 (256 bit key, 64 byte blocks): 1 operation in 249 cycles (64 bytes)
test 12 (256 bit key, 256 byte blocks): 1 operation in 414 cycles (256 bytes)
test 13 (256 bit key, 1024 byte blocks): 1 operation in 1073 cycles (1024 bytes)
test 14 (256 bit key, 8192 byte blocks): 1 operation in 7110 cycles (8192 bytes)
testing speed of ctr(aes) decryption
test 0 (128 bit key, 16 byte blocks): 1 operation in 225 cycles (16 bytes)
test 1 (128 bit key, 64 byte blocks): 1 operation in 233 cycles (64 bytes)
test 2 (128 bit key, 256 byte blocks): 1 operation in 344 cycles (256 bytes)
test 3 (128 bit key, 1024 byte blocks): 1 operation in 810 cycles (1024 bytes)
test 4 (128 bit key, 8192 byte blocks): 1 operation in 5021 cycles (8192 bytes)
test 5 (192 bit key, 16 byte blocks): 1 operation in 206 cycles (16 bytes)
test 6 (192 bit key, 64 byte blocks): 1 operation in 240 cycles (64 bytes)
test 7 (192 bit key, 256 byte blocks): 1 operation in 376 cycles (256 bytes)
test 8 (192 bit key, 1024 byte blocks): 1 operation in 938 cycles (1024 bytes)
test 9 (192 bit key, 8192 byte blocks): 1 operation in 6380 cycles (8192 bytes)
test 10 (256 bit key, 16 byte blocks): 1 operation in 214 cycles (16 bytes)
test 11 (256 bit key, 64 byte blocks): 1 operation in 251 cycles (64 bytes)
test 12 (256 bit key, 256 byte blocks): 1 operation in 411 cycles (256 bytes)
test 13 (256 bit key, 1024 byte blocks): 1 operation in 1070 cycles (1024 bytes)
test 14 (256 bit key, 8192 byte blocks): 1 operation in 7114 cycles (8192 bytes)
After:
testing speed of ctr(aes) encryption
test 0 (128 bit key, 16 byte blocks): 1 operation in 211 cycles (16 bytes)
test 1 (128 bit key, 64 byte blocks): 1 operation in 246 cycles (64 bytes)
test 2 (128 bit key, 256 byte blocks): 1 operation in 344 cycles (256 bytes)
test 3 (128 bit key, 1024 byte blocks): 1 operation in 799 cycles (1024 bytes)
test 4 (128 bit key, 8192 byte blocks): 1 operation in 4975 cycles (8192 bytes)
test 5 (192 bit key, 16 byte blocks): 1 operation in 210 cycles (16 bytes)
test 6 (192 bit key, 64 byte blocks): 1 operation in 236 cycles (64 bytes)
test 7 (192 bit key, 256 byte blocks): 1 operation in 365 cycles (256 bytes)
test 8 (192 bit key, 1024 byte blocks): 1 operation in 888 cycles (1024 bytes)
test 9 (192 bit key, 8192 byte blocks): 1 operation in 6055 cycles (8192 bytes)
test 10 (256 bit key, 16 byte blocks): 1 operation in 209 cycles (16 bytes)
test 11 (256 bit key, 64 byte blocks): 1 operation in 255 cycles (64 bytes)
test 12 (256 bit key, 256 byte blocks): 1 operation in 404 cycles (256 bytes)
test 13 (256 bit key, 1024 byte blocks): 1 operation in 1010 cycles (1024 bytes)
test 14 (256 bit key, 8192 byte blocks): 1 operation in 6669 cycles (8192 bytes)
testing speed of ctr(aes) decryption
test 0 (128 bit key, 16 byte blocks): 1 operation in 210 cycles (16 bytes)
test 1 (128 bit key, 64 byte blocks): 1 operation in 233 cycles (64 bytes)
test 2 (128 bit key, 256 byte blocks): 1 operation in 340 cycles (256 bytes)
test 3 (128 bit key, 1024 byte blocks): 1 operation in 818 cycles (1024 bytes)
test 4 (128 bit key, 8192 byte blocks): 1 operation in 4956 cycles (8192 bytes)
test 5 (192 bit key, 16 byte blocks): 1 operation in 206 cycles (16 bytes)
test 6 (192 bit key, 64 byte blocks): 1 operation in 239 cycles (64 bytes)
test 7 (192 bit key, 256 byte blocks): 1 operation in 361 cycles (256 bytes)
test 8 (192 bit key, 1024 byte blocks): 1 operation in 888 cycles (1024 bytes)
test 9 (192 bit key, 8192 byte blocks): 1 operation in 5996 cycles (8192 bytes)
test 10 (256 bit key, 16 byte blocks): 1 operation in 214 cycles (16 bytes)
test 11 (256 bit key, 64 byte blocks): 1 operation in 248 cycles (64 bytes)
test 12 (256 bit key, 256 byte blocks): 1 operation in 395 cycles (256 bytes)
test 13 (256 bit key, 1024 byte blocks): 1 operation in 1010 cycles (1024 bytes)
test 14 (256 bit key, 8192 byte blocks): 1 operation in 6664 cycles (8192 bytes)
Signed-off-by: David S. Miller <davem@davemloft.net>
Before:
testing speed of ecb(aes) decryption
test 0 (128 bit key, 16 byte blocks): 1 operation in 223 cycles (16 bytes)
test 1 (128 bit key, 64 byte blocks): 1 operation in 230 cycles (64 bytes)
test 2 (128 bit key, 256 byte blocks): 1 operation in 325 cycles (256 bytes)
test 3 (128 bit key, 1024 byte blocks): 1 operation in 719 cycles (1024 bytes)
test 4 (128 bit key, 8192 byte blocks): 1 operation in 4266 cycles (8192 bytes)
test 5 (192 bit key, 16 byte blocks): 1 operation in 211 cycles (16 bytes)
test 6 (192 bit key, 64 byte blocks): 1 operation in 234 cycles (64 bytes)
test 7 (192 bit key, 256 byte blocks): 1 operation in 353 cycles (256 bytes)
test 8 (192 bit key, 1024 byte blocks): 1 operation in 808 cycles (1024 bytes)
test 9 (192 bit key, 8192 byte blocks): 1 operation in 5344 cycles (8192 bytes)
test 10 (256 bit key, 16 byte blocks): 1 operation in 214 cycles (16 bytes)
test 11 (256 bit key, 64 byte blocks): 1 operation in 243 cycles (64 bytes)
test 12 (256 bit key, 256 byte blocks): 1 operation in 393 cycles (256 bytes)
test 13 (256 bit key, 1024 byte blocks): 1 operation in 939 cycles (1024 bytes)
test 14 (256 bit key, 8192 byte blocks): 1 operation in 6039 cycles (8192 bytes)
After:
testing speed of ecb(aes) decryption
test 0 (128 bit key, 16 byte blocks): 1 operation in 226 cycles (16 bytes)
test 1 (128 bit key, 64 byte blocks): 1 operation in 231 cycles (64 bytes)
test 2 (128 bit key, 256 byte blocks): 1 operation in 313 cycles (256 bytes)
test 3 (128 bit key, 1024 byte blocks): 1 operation in 681 cycles (1024 bytes)
test 4 (128 bit key, 8192 byte blocks): 1 operation in 3964 cycles (8192 bytes)
test 5 (192 bit key, 16 byte blocks): 1 operation in 205 cycles (16 bytes)
test 6 (192 bit key, 64 byte blocks): 1 operation in 240 cycles (64 bytes)
test 7 (192 bit key, 256 byte blocks): 1 operation in 341 cycles (256 bytes)
test 8 (192 bit key, 1024 byte blocks): 1 operation in 770 cycles (1024 bytes)
test 9 (192 bit key, 8192 byte blocks): 1 operation in 5050 cycles (8192 bytes)
test 10 (256 bit key, 16 byte blocks): 1 operation in 216 cycles (16 bytes)
test 11 (256 bit key, 64 byte blocks): 1 operation in 250 cycles (64 bytes)
test 12 (256 bit key, 256 byte blocks): 1 operation in 371 cycles (256 bytes)
test 13 (256 bit key, 1024 byte blocks): 1 operation in 869 cycles (1024 bytes)
test 14 (256 bit key, 8192 byte blocks): 1 operation in 5494 cycles (8192 bytes)
Signed-off-by: David S. Miller <davem@davemloft.net>
The AES opcodes have a 3 cycle latency, so by doing 32-bytes at a
time we avoid a pipeline bubble in between every round.
For the 256-bit key case, it looks like we're doing more work in
order to reload the KEY registers during the loop to make space
for scarce temporaries. But the load dual issues with the AES
operations so we get the KEY reloads essentially for free.
Before:
testing speed of ecb(aes) encryption
test 0 (128 bit key, 16 byte blocks): 1 operation in 264 cycles (16 bytes)
test 1 (128 bit key, 64 byte blocks): 1 operation in 231 cycles (64 bytes)
test 2 (128 bit key, 256 byte blocks): 1 operation in 329 cycles (256 bytes)
test 3 (128 bit key, 1024 byte blocks): 1 operation in 715 cycles (1024 bytes)
test 4 (128 bit key, 8192 byte blocks): 1 operation in 4248 cycles (8192 bytes)
test 5 (192 bit key, 16 byte blocks): 1 operation in 221 cycles (16 bytes)
test 6 (192 bit key, 64 byte blocks): 1 operation in 234 cycles (64 bytes)
test 7 (192 bit key, 256 byte blocks): 1 operation in 359 cycles (256 bytes)
test 8 (192 bit key, 1024 byte blocks): 1 operation in 803 cycles (1024 bytes)
test 9 (192 bit key, 8192 byte blocks): 1 operation in 5366 cycles (8192 bytes)
test 10 (256 bit key, 16 byte blocks): 1 operation in 209 cycles (16 bytes)
test 11 (256 bit key, 64 byte blocks): 1 operation in 255 cycles (64 bytes)
test 12 (256 bit key, 256 byte blocks): 1 operation in 379 cycles (256 bytes)
test 13 (256 bit key, 1024 byte blocks): 1 operation in 938 cycles (1024 bytes)
test 14 (256 bit key, 8192 byte blocks): 1 operation in 6041 cycles (8192 bytes)
After:
testing speed of ecb(aes) encryption
test 0 (128 bit key, 16 byte blocks): 1 operation in 266 cycles (16 bytes)
test 1 (128 bit key, 64 byte blocks): 1 operation in 256 cycles (64 bytes)
test 2 (128 bit key, 256 byte blocks): 1 operation in 305 cycles (256 bytes)
test 3 (128 bit key, 1024 byte blocks): 1 operation in 676 cycles (1024 bytes)
test 4 (128 bit key, 8192 byte blocks): 1 operation in 3981 cycles (8192 bytes)
test 5 (192 bit key, 16 byte blocks): 1 operation in 210 cycles (16 bytes)
test 6 (192 bit key, 64 byte blocks): 1 operation in 233 cycles (64 bytes)
test 7 (192 bit key, 256 byte blocks): 1 operation in 340 cycles (256 bytes)
test 8 (192 bit key, 1024 byte blocks): 1 operation in 766 cycles (1024 bytes)
test 9 (192 bit key, 8192 byte blocks): 1 operation in 5136 cycles (8192 bytes)
test 10 (256 bit key, 16 byte blocks): 1 operation in 206 cycles (16 bytes)
test 11 (256 bit key, 64 byte blocks): 1 operation in 268 cycles (64 bytes)
test 12 (256 bit key, 256 byte blocks): 1 operation in 368 cycles (256 bytes)
test 13 (256 bit key, 1024 byte blocks): 1 operation in 890 cycles (1024 bytes)
test 14 (256 bit key, 8192 byte blocks): 1 operation in 5718 cycles (8192 bytes)
Signed-off-by: David S. Miller <davem@davemloft.net>
Instead of testing and branching off of the key size on every
encrypt/decrypt call, use method ops assigned at key set time.
Reverse the order of float registers used for decryption to make
future changes easier.
Align all assembler routines on a 32-byte boundary.
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller