sparc64: Add SHA1 driver making use of the 'sha1' instruction.
Signed-off-by: David S. Miller <davem@davemloft.net> Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
David S. Miller
parent
bab96bda44
commit
4ff28d4ca9
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@ -6,3 +6,4 @@ obj-y += kernel/
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obj-y += mm/
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obj-y += math-emu/
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obj-y += net/
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obj-y += crypto/
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@ -0,0 +1,7 @@
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#
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# Arch-specific CryptoAPI modules.
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#
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obj-$(CONFIG_CRYPTO_SHA1_SPARC64) += sha1-sparc64.o
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sha1-sparc64-y := sha1_asm.o sha1_glue.o
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@ -0,0 +1,72 @@
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#include <linux/linkage.h>
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#include <asm/visasm.h>
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ENTRY(sha1_sparc64_transform)
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/* %o0 = digest, %o1 = data, %o2 = rounds */
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VISEntryHalf
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ld [%o0 + 0x00], %f0
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ld [%o0 + 0x04], %f1
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ld [%o0 + 0x08], %f2
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andcc %o1, 0x7, %g0
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ld [%o0 + 0x0c], %f3
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bne,pn %xcc, 10f
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ld [%o0 + 0x10], %f4
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1:
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ldd [%o1 + 0x00], %f8
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ldd [%o1 + 0x08], %f10
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ldd [%o1 + 0x10], %f12
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ldd [%o1 + 0x18], %f14
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ldd [%o1 + 0x20], %f16
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ldd [%o1 + 0x28], %f18
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ldd [%o1 + 0x30], %f20
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ldd [%o1 + 0x38], %f22
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/* sha1 */
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.word 0x81b02820
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subcc %o2, 1, %o2
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bne,pt %xcc, 1b
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add %o1, 0x40, %o1
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5:
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st %f0, [%o0 + 0x00]
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st %f1, [%o0 + 0x04]
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st %f2, [%o0 + 0x08]
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st %f3, [%o0 + 0x0c]
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st %f4, [%o0 + 0x10]
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retl
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VISExitHalf
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10:
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alignaddr %o1, %g0, %o1
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ldd [%o1 + 0x00], %f10
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1:
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ldd [%o1 + 0x08], %f12
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ldd [%o1 + 0x10], %f14
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ldd [%o1 + 0x18], %f16
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ldd [%o1 + 0x20], %f18
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ldd [%o1 + 0x28], %f20
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ldd [%o1 + 0x30], %f22
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ldd [%o1 + 0x38], %f24
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ldd [%o1 + 0x40], %f26
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faligndata %f10, %f12, %f8
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faligndata %f12, %f14, %f10
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faligndata %f14, %f16, %f12
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faligndata %f16, %f18, %f14
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faligndata %f18, %f20, %f16
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faligndata %f20, %f22, %f18
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faligndata %f22, %f24, %f20
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faligndata %f24, %f26, %f22
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/* sha1 */
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.word 0x81b02820
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subcc %o2, 1, %o2
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fsrc1 %f26, %f10
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bne,pt %xcc, 1b
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add %o1, 0x40, %o1
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ba,a,pt %xcc, 5b
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ENDPROC(sha1_sparc64_transform)
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@ -0,0 +1,181 @@
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/* Glue code for SHA1 hashing optimized for sparc64 crypto opcodes.
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*
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* This is based largely upon arch/x86/crypto/sha1_ssse3_glue.c
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*
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* Copyright (c) Alan Smithee.
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* Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
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* Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
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* Copyright (c) Mathias Krause <minipli@googlemail.com>
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <crypto/internal/hash.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/mm.h>
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#include <linux/cryptohash.h>
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#include <linux/types.h>
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#include <crypto/sha.h>
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#include <asm/pstate.h>
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#include <asm/elf.h>
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asmlinkage void sha1_sparc64_transform(u32 *digest, const char *data,
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unsigned int rounds);
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static int sha1_sparc64_init(struct shash_desc *desc)
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{
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struct sha1_state *sctx = shash_desc_ctx(desc);
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*sctx = (struct sha1_state){
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.state = { SHA1_H0, SHA1_H1, SHA1_H2, SHA1_H3, SHA1_H4 },
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};
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return 0;
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}
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static void __sha1_sparc64_update(struct sha1_state *sctx, const u8 *data,
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unsigned int len, unsigned int partial)
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{
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unsigned int done = 0;
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sctx->count += len;
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if (partial) {
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done = SHA1_BLOCK_SIZE - partial;
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memcpy(sctx->buffer + partial, data, done);
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sha1_sparc64_transform(sctx->state, sctx->buffer, 1);
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}
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if (len - done >= SHA1_BLOCK_SIZE) {
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const unsigned int rounds = (len - done) / SHA1_BLOCK_SIZE;
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sha1_sparc64_transform(sctx->state, data + done, rounds);
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done += rounds * SHA1_BLOCK_SIZE;
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}
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memcpy(sctx->buffer, data + done, len - done);
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}
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static int sha1_sparc64_update(struct shash_desc *desc, const u8 *data,
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unsigned int len)
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{
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struct sha1_state *sctx = shash_desc_ctx(desc);
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unsigned int partial = sctx->count % SHA1_BLOCK_SIZE;
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/* Handle the fast case right here */
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if (partial + len < SHA1_BLOCK_SIZE) {
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sctx->count += len;
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memcpy(sctx->buffer + partial, data, len);
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} else
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__sha1_sparc64_update(sctx, data, len, partial);
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return 0;
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}
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/* Add padding and return the message digest. */
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static int sha1_sparc64_final(struct shash_desc *desc, u8 *out)
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{
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struct sha1_state *sctx = shash_desc_ctx(desc);
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unsigned int i, index, padlen;
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__be32 *dst = (__be32 *)out;
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__be64 bits;
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static const u8 padding[SHA1_BLOCK_SIZE] = { 0x80, };
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bits = cpu_to_be64(sctx->count << 3);
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/* Pad out to 56 mod 64 and append length */
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index = sctx->count % SHA1_BLOCK_SIZE;
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padlen = (index < 56) ? (56 - index) : ((SHA1_BLOCK_SIZE+56) - index);
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/* We need to fill a whole block for __sha1_sparc64_update() */
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if (padlen <= 56) {
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sctx->count += padlen;
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memcpy(sctx->buffer + index, padding, padlen);
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} else {
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__sha1_sparc64_update(sctx, padding, padlen, index);
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}
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__sha1_sparc64_update(sctx, (const u8 *)&bits, sizeof(bits), 56);
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/* Store state in digest */
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for (i = 0; i < 5; i++)
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dst[i] = cpu_to_be32(sctx->state[i]);
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/* Wipe context */
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memset(sctx, 0, sizeof(*sctx));
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return 0;
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}
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static int sha1_sparc64_export(struct shash_desc *desc, void *out)
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{
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struct sha1_state *sctx = shash_desc_ctx(desc);
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memcpy(out, sctx, sizeof(*sctx));
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return 0;
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}
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static int sha1_sparc64_import(struct shash_desc *desc, const void *in)
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{
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struct sha1_state *sctx = shash_desc_ctx(desc);
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memcpy(sctx, in, sizeof(*sctx));
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return 0;
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}
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static struct shash_alg alg = {
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.digestsize = SHA1_DIGEST_SIZE,
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.init = sha1_sparc64_init,
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.update = sha1_sparc64_update,
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.final = sha1_sparc64_final,
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.export = sha1_sparc64_export,
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.import = sha1_sparc64_import,
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.descsize = sizeof(struct sha1_state),
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.statesize = sizeof(struct sha1_state),
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.base = {
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.cra_name = "sha1",
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.cra_driver_name= "sha1-sparc64",
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.cra_priority = 150,
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.cra_flags = CRYPTO_ALG_TYPE_SHASH,
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.cra_blocksize = SHA1_BLOCK_SIZE,
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.cra_module = THIS_MODULE,
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}
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};
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static bool __init sparc64_has_sha1_opcode(void)
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{
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unsigned long cfr;
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if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))
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return false;
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__asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
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if (!(cfr & CFR_SHA1))
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return false;
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return true;
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}
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static int __init sha1_sparc64_mod_init(void)
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{
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if (sparc64_has_sha1_opcode()) {
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pr_info("Using sparc64 sha1 opcode optimized SHA-1 implementation\n");
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return crypto_register_shash(&alg);
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}
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pr_info("sparc64 sha1 opcode not available.\n");
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return -ENODEV;
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}
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static void __exit sha1_sparc64_mod_fini(void)
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{
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crypto_unregister_shash(&alg);
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}
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module_init(sha1_sparc64_mod_init);
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module_exit(sha1_sparc64_mod_fini);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm, sparc64 sha1 opcode accelerated");
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MODULE_ALIAS("sha1");
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@ -134,6 +134,10 @@ EXPORT_SYMBOL(copy_user_page);
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void VISenter(void);
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EXPORT_SYMBOL(VISenter);
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/* CRYPTO code needs this */
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void VISenterhalf(void);
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EXPORT_SYMBOL(VISenterhalf);
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extern void xor_vis_2(unsigned long, unsigned long *, unsigned long *);
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extern void xor_vis_3(unsigned long, unsigned long *, unsigned long *,
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unsigned long *);
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@ -433,6 +433,15 @@ config CRYPTO_SHA1_SSSE3
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using Supplemental SSE3 (SSSE3) instructions or Advanced Vector
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Extensions (AVX), when available.
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config CRYPTO_SHA1_SPARC64
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tristate "SHA1 digest algorithm (SPARC64)"
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depends on SPARC64
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select CRYPTO_SHA1
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select CRYPTO_HASH
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help
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SHA-1 secure hash standard (FIPS 180-1/DFIPS 180-2) implemented
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using sparc64 crypto instructions, when available.
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config CRYPTO_SHA256
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tristate "SHA224 and SHA256 digest algorithm"
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select CRYPTO_HASH
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