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@xxxxxxxxxxxxx> --- arch/sparc/crypto/aes_asm.S | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/arch/sparc/crypto/aes_asm.S b/arch/sparc/crypto/aes_asm.S index 2086088..23f6cbb 100644 --- a/arch/sparc/crypto/aes_asm.S +++ b/arch/sparc/crypto/aes_asm.S @@ -188,6 +188,8 @@ ldd [%o0 + 0x18], %f56; \ ldd [%o0 + 0x10], %f58; \ DECRYPT_256_TWO_ROUNDS_2(KEY_BASE + 8, I0, I1, I2, I3, KEY_BASE + 0) \ + ldd [%o0 + 0x08], %f60; \ + ldd [%o0 + 0x00], %f62; \ DECRYPT_256_TWO_ROUNDS_2(KEY_BASE + 16, I0, I1, I2, I3, KEY_BASE + 0) \ DECRYPT_256_TWO_ROUNDS_2(KEY_BASE + 24, I0, I1, I2, I3, KEY_BASE + 0) \ DECRYPT_256_TWO_ROUNDS_2(KEY_BASE + 32, I0, I1, I2, I3, KEY_BASE + 0) \ @@ -201,7 +203,7 @@ ldd [%o0 + 0xd8], %f8; \ ldd [%o0 + 0xd0], %f10; \ AES_DROUND23_L(KEY_BASE + 52, KEY_BASE + 4, KEY_BASE + 6, I3) \ - AES_DROUND01_L(KEY_BASE + 54, KEY_BASE + 4, KEY_BASE + 6, I2) + AES_DROUND01_L(KEY_BASE + 54, KEY_BASE + 4, KEY_BASE + 6, I2) \ ldd [%o0 + 0xc8], %f12; \ ldd [%o0 + 0xc0], %f14; @@ -1144,8 +1146,8 @@ ENTRY(aes_sparc64_ecb_decrypt_256) DECRYPT_256_2(8, 4, 6, 0, 2) std %f4, [%o2 + 0x00] std %f6, [%o2 + 0x08] - std %f60, [%o2 + 0x10] - std %f62, [%o2 + 0x18] + std %f0, [%o2 + 0x10] + std %f2, [%o2 + 0x18] sub %o3, 0x20, %o3 add %o1, 0x20, %o1 brgz,pt %o3, 1b @@ -1509,6 +1511,10 @@ ENTRY(aes_sparc64_ctr_crypt_256) add %o2, 0x20, %o2 brlz,pt %o3, 11f nop + ldd [%o0 + 0xd0], %f56 + ldd [%o0 + 0xd8], %f58 + ldd [%o0 + 0xe0], %f60 + ldd [%o0 + 0xe8], %f62 10: xor %g1, %g3, %o5 MOVXTOD_O5_F0 xor %g2, %g7, %o5 -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
