sparc64: Add SHA1 driver making use of the 'sha1' instruction. (4ff28d4c) · Commits · e / devices / android_kernel_oneplus_sm8150

arch/sparc/Kbuild

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		@@ -6,3 +6,4 @@ obj-y += kernel/
		obj-y += mm/
		obj-y += math-emu/
		obj-y += net/
		obj-y += crypto/

arch/sparc/crypto/Makefile

0 → 100644

+7 −0

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		#
		# Arch-specific CryptoAPI modules.
		#

		obj-$(CONFIG_CRYPTO_SHA1_SPARC64) += sha1-sparc64.o

		sha1-sparc64-y := sha1_asm.o sha1_glue.o

arch/sparc/crypto/sha1_asm.S

0 → 100644

+72 −0

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		#include <linux/linkage.h>
		#include <asm/visasm.h>

		ENTRY(sha1_sparc64_transform)
		/* %o0 = digest, %o1 = data, %o2 = rounds */
		VISEntryHalf
		ld [%o0 + 0x00], %f0
		ld [%o0 + 0x04], %f1
		ld [%o0 + 0x08], %f2
		andcc %o1, 0x7, %g0
		ld [%o0 + 0x0c], %f3
		bne,pn %xcc, 10f
		ld [%o0 + 0x10], %f4

		1:
		ldd [%o1 + 0x00], %f8
		ldd [%o1 + 0x08], %f10
		ldd [%o1 + 0x10], %f12
		ldd [%o1 + 0x18], %f14
		ldd [%o1 + 0x20], %f16
		ldd [%o1 + 0x28], %f18
		ldd [%o1 + 0x30], %f20
		ldd [%o1 + 0x38], %f22

		/* sha1 */
		.word 0x81b02820

		subcc %o2, 1, %o2
		bne,pt %xcc, 1b
		add %o1, 0x40, %o1

		5:
		st %f0, [%o0 + 0x00]
		st %f1, [%o0 + 0x04]
		st %f2, [%o0 + 0x08]
		st %f3, [%o0 + 0x0c]
		st %f4, [%o0 + 0x10]
		retl
		VISExitHalf
		10:
		alignaddr %o1, %g0, %o1

		ldd [%o1 + 0x00], %f10
		1:
		ldd [%o1 + 0x08], %f12
		ldd [%o1 + 0x10], %f14
		ldd [%o1 + 0x18], %f16
		ldd [%o1 + 0x20], %f18
		ldd [%o1 + 0x28], %f20
		ldd [%o1 + 0x30], %f22
		ldd [%o1 + 0x38], %f24
		ldd [%o1 + 0x40], %f26

		faligndata %f10, %f12, %f8
		faligndata %f12, %f14, %f10
		faligndata %f14, %f16, %f12
		faligndata %f16, %f18, %f14
		faligndata %f18, %f20, %f16
		faligndata %f20, %f22, %f18
		faligndata %f22, %f24, %f20
		faligndata %f24, %f26, %f22

		/* sha1 */
		.word 0x81b02820

		subcc %o2, 1, %o2
		fsrc1 %f26, %f10
		bne,pt %xcc, 1b
		add %o1, 0x40, %o1

		ba,a,pt %xcc, 5b
		ENDPROC(sha1_sparc64_transform)

arch/sparc/crypto/sha1_glue.c

0 → 100644

+181 −0

Original line number	Diff line number	Diff line
		/* Glue code for SHA1 hashing optimized for sparc64 crypto opcodes.
		*
		* This is based largely upon arch/x86/crypto/sha1_ssse3_glue.c
		*
		* Copyright (c) Alan Smithee.
		* Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
		* Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
		* Copyright (c) Mathias Krause <minipli@googlemail.com>
		*/

		#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

		#include <crypto/internal/hash.h>
		#include <linux/init.h>
		#include <linux/module.h>
		#include <linux/mm.h>
		#include <linux/cryptohash.h>
		#include <linux/types.h>
		#include <crypto/sha.h>

		#include <asm/pstate.h>
		#include <asm/elf.h>

		asmlinkage void sha1_sparc64_transform(u32 digest, const char data,
		unsigned int rounds);

		static int sha1_sparc64_init(struct shash_desc *desc)
		{
		struct sha1_state *sctx = shash_desc_ctx(desc);

		*sctx = (struct sha1_state){
		.state = { SHA1_H0, SHA1_H1, SHA1_H2, SHA1_H3, SHA1_H4 },
		};

		return 0;
		}

		static void __sha1_sparc64_update(struct sha1_state sctx, const u8 data,
		unsigned int len, unsigned int partial)
		{
		unsigned int done = 0;

		sctx->count += len;
		if (partial) {
		done = SHA1_BLOCK_SIZE - partial;
		memcpy(sctx->buffer + partial, data, done);
		sha1_sparc64_transform(sctx->state, sctx->buffer, 1);
		}
		if (len - done >= SHA1_BLOCK_SIZE) {
		const unsigned int rounds = (len - done) / SHA1_BLOCK_SIZE;

		sha1_sparc64_transform(sctx->state, data + done, rounds);
		done += rounds * SHA1_BLOCK_SIZE;
		}

		memcpy(sctx->buffer, data + done, len - done);
		}

		static int sha1_sparc64_update(struct shash_desc desc, const u8 data,
		unsigned int len)
		{
		struct sha1_state *sctx = shash_desc_ctx(desc);
		unsigned int partial = sctx->count % SHA1_BLOCK_SIZE;

		/* Handle the fast case right here */
		if (partial + len < SHA1_BLOCK_SIZE) {
		sctx->count += len;
		memcpy(sctx->buffer + partial, data, len);
		} else
		__sha1_sparc64_update(sctx, data, len, partial);

		return 0;
		}

		/* Add padding and return the message digest. */
		static int sha1_sparc64_final(struct shash_desc desc, u8 out)
		{
		struct sha1_state *sctx = shash_desc_ctx(desc);
		unsigned int i, index, padlen;
		__be32 dst = (__be32 )out;
		__be64 bits;
		static const u8 padding[SHA1_BLOCK_SIZE] = { 0x80, };

		bits = cpu_to_be64(sctx->count << 3);

		/* Pad out to 56 mod 64 and append length */
		index = sctx->count % SHA1_BLOCK_SIZE;
		padlen = (index < 56) ? (56 - index) : ((SHA1_BLOCK_SIZE+56) - index);

		/* We need to fill a whole block for __sha1_sparc64_update() */
		if (padlen <= 56) {
		sctx->count += padlen;
		memcpy(sctx->buffer + index, padding, padlen);
		} else {
		__sha1_sparc64_update(sctx, padding, padlen, index);
		}
		__sha1_sparc64_update(sctx, (const u8 *)&bits, sizeof(bits), 56);

		/* Store state in digest */
		for (i = 0; i < 5; i++)
		dst[i] = cpu_to_be32(sctx->state[i]);

		/* Wipe context */
		memset(sctx, 0, sizeof(*sctx));

		return 0;
		}

		static int sha1_sparc64_export(struct shash_desc desc, void out)
		{
		struct sha1_state *sctx = shash_desc_ctx(desc);

		memcpy(out, sctx, sizeof(*sctx));

		return 0;
		}

		static int sha1_sparc64_import(struct shash_desc desc, const void in)
		{
		struct sha1_state *sctx = shash_desc_ctx(desc);

		memcpy(sctx, in, sizeof(*sctx));

		return 0;
		}

		static struct shash_alg alg = {
		.digestsize = SHA1_DIGEST_SIZE,
		.init = sha1_sparc64_init,
		.update = sha1_sparc64_update,
		.final = sha1_sparc64_final,
		.export = sha1_sparc64_export,
		.import = sha1_sparc64_import,
		.descsize = sizeof(struct sha1_state),
		.statesize = sizeof(struct sha1_state),
		.base = {
		.cra_name = "sha1",
		.cra_driver_name= "sha1-sparc64",
		.cra_priority = 150,
		.cra_flags = CRYPTO_ALG_TYPE_SHASH,
		.cra_blocksize = SHA1_BLOCK_SIZE,
		.cra_module = THIS_MODULE,
		}
		};

		static bool __init sparc64_has_sha1_opcode(void)
		{
		unsigned long cfr;

		if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))
		return false;

		__asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
		if (!(cfr & CFR_SHA1))
		return false;

		return true;
		}

		static int __init sha1_sparc64_mod_init(void)
		{
		if (sparc64_has_sha1_opcode()) {
		pr_info("Using sparc64 sha1 opcode optimized SHA-1 implementation\n");
		return crypto_register_shash(&alg);
		}
		pr_info("sparc64 sha1 opcode not available.\n");
		return -ENODEV;
		}

		static void __exit sha1_sparc64_mod_fini(void)
		{
		crypto_unregister_shash(&alg);
		}

		module_init(sha1_sparc64_mod_init);
		module_exit(sha1_sparc64_mod_fini);

		MODULE_LICENSE("GPL");
		MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm, sparc64 sha1 opcode accelerated");

		MODULE_ALIAS("sha1");

arch/sparc/lib/ksyms.c

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Original line number	Diff line number	Diff line
		@@ -134,6 +134,10 @@ EXPORT_SYMBOL(copy_user_page);
		void VISenter(void);
		EXPORT_SYMBOL(VISenter);

		/* CRYPTO code needs this */
		void VISenterhalf(void);
		EXPORT_SYMBOL(VISenterhalf);

		extern void xor_vis_2(unsigned long, unsigned long , unsigned long );
		extern void xor_vis_3(unsigned long, unsigned long , unsigned long ,
		unsigned long *);