| author | Jason A. Donenfeld <Jason@zx2c4.com> | 2016-11-07 19:47:09 (GMT) |
|---|---|---|
| committer | Eric Biggers <ebiggers@google.com> | 2018-12-13 17:34:58 (GMT) |
| commit | cbaf13e4494a903ff54e90484d3de2bc9adfa253 (patch) | |
| tree | 89029d9355cc9ccbcd57f04a17a8e1e804e29dcb | |
| parent | d233322489d23b9358c522c24d4d6f15c24b89f0 (diff) | |
| download | common-cbaf13e4494a903ff54e90484d3de2bc9adfa253.zip common-cbaf13e4494a903ff54e90484d3de2bc9adfa253.tar.gz common-cbaf13e4494a903ff54e90484d3de2bc9adfa253.tar.bz2 | |
UPSTREAM: crypto: poly1305 - Use unaligned access where required
By using the unaligned access helpers, we drastically improve
performance on small MIPS routers that have to go through the exception
fix-up handler for these unaligned accesses.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Reviewed-by: Eric Biggers <ebiggers@google.com>
Acked-by: Martin Willi <martin@strongswan.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
(cherry picked from commit 109e23bd10b5688895e61916435834c71a0bd1ed)
Bug: 112008522
Test: As series, see Ic61c13b53facfd2173065be715a7ee5f3af8760b
Change-Id: Ie2b1ba16d0a2c8b402f9a22e612c4baa3a4e8240
Signed-off-by: Eric Biggers <ebiggers@google.com>
| -rw-r--r-- | crypto/poly1305_generic.c | 34 |
1 files changed, 15 insertions, 19 deletions
diff --git a/crypto/poly1305_generic.c b/crypto/poly1305_generic.c index bca9923..ba39eb3 100644 --- a/crypto/poly1305_generic.c +++ b/crypto/poly1305_generic.c @@ -17,6 +17,7 @@ #include <linux/crypto.h> #include <linux/kernel.h> #include <linux/module.h> +#include <asm/unaligned.h> static inline u64 mlt(u64 a, u64 b) { @@ -33,11 +34,6 @@ static inline u32 and(u32 v, u32 mask) return v & mask; } -static inline u32 le32_to_cpuvp(const void *p) -{ - return le32_to_cpup(p); -} - int crypto_poly1305_init(struct shash_desc *desc) { struct poly1305_desc_ctx *dctx = shash_desc_ctx(desc); @@ -54,19 +50,19 @@ EXPORT_SYMBOL_GPL(crypto_poly1305_init); static void poly1305_setrkey(struct poly1305_desc_ctx *dctx, const u8 *key) { /* r &= 0xffffffc0ffffffc0ffffffc0fffffff */ - dctx->r[0] = (le32_to_cpuvp(key + 0) >> 0) & 0x3ffffff; - dctx->r[1] = (le32_to_cpuvp(key + 3) >> 2) & 0x3ffff03; - dctx->r[2] = (le32_to_cpuvp(key + 6) >> 4) & 0x3ffc0ff; - dctx->r[3] = (le32_to_cpuvp(key + 9) >> 6) & 0x3f03fff; - dctx->r[4] = (le32_to_cpuvp(key + 12) >> 8) & 0x00fffff; + dctx->r[0] = (get_unaligned_le32(key + 0) >> 0) & 0x3ffffff; + dctx->r[1] = (get_unaligned_le32(key + 3) >> 2) & 0x3ffff03; + dctx->r[2] = (get_unaligned_le32(key + 6) >> 4) & 0x3ffc0ff; + dctx->r[3] = (get_unaligned_le32(key + 9) >> 6) & 0x3f03fff; + dctx->r[4] = (get_unaligned_le32(key + 12) >> 8) & 0x00fffff; } static void poly1305_setskey(struct poly1305_desc_ctx *dctx, const u8 *key) { - dctx->s[0] = le32_to_cpuvp(key + 0); - dctx->s[1] = le32_to_cpuvp(key + 4); - dctx->s[2] = le32_to_cpuvp(key + 8); - dctx->s[3] = le32_to_cpuvp(key + 12); + dctx->s[0] = get_unaligned_le32(key + 0); + dctx->s[1] = get_unaligned_le32(key + 4); + dctx->s[2] = get_unaligned_le32(key + 8); + dctx->s[3] = get_unaligned_le32(key + 12); } /* @@ -131,11 +127,11 @@ static unsigned int poly1305_blocks(struct poly1305_desc_ctx *dctx, while (likely(srclen >= POLY1305_BLOCK_SIZE)) { /* h += m[i] */ - h0 += (le32_to_cpuvp(src + 0) >> 0) & 0x3ffffff; - h1 += (le32_to_cpuvp(src + 3) >> 2) & 0x3ffffff; - h2 += (le32_to_cpuvp(src + 6) >> 4) & 0x3ffffff; - h3 += (le32_to_cpuvp(src + 9) >> 6) & 0x3ffffff; - h4 += (le32_to_cpuvp(src + 12) >> 8) | hibit; + h0 += (get_unaligned_le32(src + 0) >> 0) & 0x3ffffff; + h1 += (get_unaligned_le32(src + 3) >> 2) & 0x3ffffff; + h2 += (get_unaligned_le32(src + 6) >> 4) & 0x3ffffff; + h3 += (get_unaligned_le32(src + 9) >> 6) & 0x3ffffff; + h4 += (get_unaligned_le32(src + 12) >> 8) | hibit; /* h *= r */ d0 = mlt(h0, r0) + mlt(h1, s4) + mlt(h2, s3) + |