Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Cryptographic API. |
| 3 | * |
| 4 | * Support for VIA PadLock hardware crypto engine. |
| 5 | * |
| 6 | * Copyright (c) 2004 Michal Ludvig <michal@logix.cz> |
| 7 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | */ |
| 9 | |
Herbert Xu | 28ce728 | 2006-08-21 21:38:42 +1000 | [diff] [blame] | 10 | #include <crypto/algapi.h> |
Sebastian Siewior | 89e1265 | 2007-10-17 23:18:57 +0800 | [diff] [blame] | 11 | #include <crypto/aes.h> |
Herbert Xu | 2149308 | 2011-01-07 14:52:00 +1100 | [diff] [blame] | 12 | #include <crypto/padlock.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #include <linux/module.h> |
| 14 | #include <linux/init.h> |
| 15 | #include <linux/types.h> |
| 16 | #include <linux/errno.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/interrupt.h> |
Herbert Xu | 6789b2d | 2005-07-06 13:52:27 -0700 | [diff] [blame] | 18 | #include <linux/kernel.h> |
Herbert Xu | 420a4b2 | 2008-08-31 15:58:45 +1000 | [diff] [blame] | 19 | #include <linux/percpu.h> |
| 20 | #include <linux/smp.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 21 | #include <linux/slab.h> |
Andi Kleen | 3bd391f | 2012-01-26 00:09:06 +0100 | [diff] [blame] | 22 | #include <asm/cpu_device_id.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #include <asm/byteorder.h> |
Chuck Ebbert | a76c1c2 | 2009-06-18 19:24:10 +0800 | [diff] [blame] | 24 | #include <asm/processor.h> |
Suresh Siddha | e491401 | 2008-08-13 22:02:26 +1000 | [diff] [blame] | 25 | #include <asm/i387.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | |
Chuck Ebbert | 8d8409f | 2009-06-18 19:31:09 +0800 | [diff] [blame] | 27 | /* |
| 28 | * Number of data blocks actually fetched for each xcrypt insn. |
| 29 | * Processors with prefetch errata will fetch extra blocks. |
| 30 | */ |
Chuck Ebbert | a76c1c2 | 2009-06-18 19:24:10 +0800 | [diff] [blame] | 31 | static unsigned int ecb_fetch_blocks = 2; |
Chuck Ebbert | 8d8409f | 2009-06-18 19:31:09 +0800 | [diff] [blame] | 32 | #define MAX_ECB_FETCH_BLOCKS (8) |
Chuck Ebbert | a76c1c2 | 2009-06-18 19:24:10 +0800 | [diff] [blame] | 33 | #define ecb_fetch_bytes (ecb_fetch_blocks * AES_BLOCK_SIZE) |
Chuck Ebbert | 8d8409f | 2009-06-18 19:31:09 +0800 | [diff] [blame] | 34 | |
| 35 | static unsigned int cbc_fetch_blocks = 1; |
| 36 | #define MAX_CBC_FETCH_BLOCKS (4) |
Chuck Ebbert | a76c1c2 | 2009-06-18 19:24:10 +0800 | [diff] [blame] | 37 | #define cbc_fetch_bytes (cbc_fetch_blocks * AES_BLOCK_SIZE) |
| 38 | |
Michal Ludvig | ccc17c3 | 2006-07-15 10:23:49 +1000 | [diff] [blame] | 39 | /* Control word. */ |
| 40 | struct cword { |
| 41 | unsigned int __attribute__ ((__packed__)) |
| 42 | rounds:4, |
| 43 | algo:3, |
| 44 | keygen:1, |
| 45 | interm:1, |
| 46 | encdec:1, |
| 47 | ksize:2; |
| 48 | } __attribute__ ((__aligned__(PADLOCK_ALIGNMENT))); |
| 49 | |
Michal Ludvig | cc08632 | 2006-07-15 11:08:50 +1000 | [diff] [blame] | 50 | /* Whenever making any changes to the following |
| 51 | * structure *make sure* you keep E, d_data |
Sebastian Siewior | 7dc748e | 2008-04-01 21:24:50 +0800 | [diff] [blame] | 52 | * and cword aligned on 16 Bytes boundaries and |
| 53 | * the Hardware can access 16 * 16 bytes of E and d_data |
| 54 | * (only the first 15 * 16 bytes matter but the HW reads |
| 55 | * more). |
| 56 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | struct aes_ctx { |
Sebastian Siewior | 7dc748e | 2008-04-01 21:24:50 +0800 | [diff] [blame] | 58 | u32 E[AES_MAX_KEYLENGTH_U32] |
| 59 | __attribute__ ((__aligned__(PADLOCK_ALIGNMENT))); |
| 60 | u32 d_data[AES_MAX_KEYLENGTH_U32] |
| 61 | __attribute__ ((__aligned__(PADLOCK_ALIGNMENT))); |
Herbert Xu | 6789b2d | 2005-07-06 13:52:27 -0700 | [diff] [blame] | 62 | struct { |
| 63 | struct cword encrypt; |
| 64 | struct cword decrypt; |
| 65 | } cword; |
Herbert Xu | 82062c7 | 2006-05-16 22:20:34 +1000 | [diff] [blame] | 66 | u32 *D; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | }; |
| 68 | |
Tejun Heo | 390dfd9 | 2009-10-29 22:34:14 +0900 | [diff] [blame] | 69 | static DEFINE_PER_CPU(struct cword *, paes_last_cword); |
Herbert Xu | 420a4b2 | 2008-08-31 15:58:45 +1000 | [diff] [blame] | 70 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | /* Tells whether the ACE is capable to generate |
| 72 | the extended key for a given key_len. */ |
| 73 | static inline int |
| 74 | aes_hw_extkey_available(uint8_t key_len) |
| 75 | { |
| 76 | /* TODO: We should check the actual CPU model/stepping |
| 77 | as it's possible that the capability will be |
| 78 | added in the next CPU revisions. */ |
| 79 | if (key_len == 16) |
| 80 | return 1; |
| 81 | return 0; |
| 82 | } |
| 83 | |
Herbert Xu | 28ce728 | 2006-08-21 21:38:42 +1000 | [diff] [blame] | 84 | static inline struct aes_ctx *aes_ctx_common(void *ctx) |
Herbert Xu | 6789b2d | 2005-07-06 13:52:27 -0700 | [diff] [blame] | 85 | { |
Herbert Xu | 28ce728 | 2006-08-21 21:38:42 +1000 | [diff] [blame] | 86 | unsigned long addr = (unsigned long)ctx; |
Herbert Xu | f10b789 | 2006-01-25 22:34:01 +1100 | [diff] [blame] | 87 | unsigned long align = PADLOCK_ALIGNMENT; |
| 88 | |
| 89 | if (align <= crypto_tfm_ctx_alignment()) |
| 90 | align = 1; |
Herbert Xu | 6c2bb98 | 2006-05-16 22:09:29 +1000 | [diff] [blame] | 91 | return (struct aes_ctx *)ALIGN(addr, align); |
Herbert Xu | 6789b2d | 2005-07-06 13:52:27 -0700 | [diff] [blame] | 92 | } |
| 93 | |
Herbert Xu | 28ce728 | 2006-08-21 21:38:42 +1000 | [diff] [blame] | 94 | static inline struct aes_ctx *aes_ctx(struct crypto_tfm *tfm) |
| 95 | { |
| 96 | return aes_ctx_common(crypto_tfm_ctx(tfm)); |
| 97 | } |
| 98 | |
| 99 | static inline struct aes_ctx *blk_aes_ctx(struct crypto_blkcipher *tfm) |
| 100 | { |
| 101 | return aes_ctx_common(crypto_blkcipher_ctx(tfm)); |
| 102 | } |
| 103 | |
Herbert Xu | 6c2bb98 | 2006-05-16 22:09:29 +1000 | [diff] [blame] | 104 | static int aes_set_key(struct crypto_tfm *tfm, const u8 *in_key, |
Herbert Xu | 560c06a | 2006-08-13 14:16:39 +1000 | [diff] [blame] | 105 | unsigned int key_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | { |
Herbert Xu | 6c2bb98 | 2006-05-16 22:09:29 +1000 | [diff] [blame] | 107 | struct aes_ctx *ctx = aes_ctx(tfm); |
Herbert Xu | 06ace7a | 2005-10-30 21:25:15 +1100 | [diff] [blame] | 108 | const __le32 *key = (const __le32 *)in_key; |
Herbert Xu | 560c06a | 2006-08-13 14:16:39 +1000 | [diff] [blame] | 109 | u32 *flags = &tfm->crt_flags; |
Sebastian Siewior | 7dc748e | 2008-04-01 21:24:50 +0800 | [diff] [blame] | 110 | struct crypto_aes_ctx gen_aes; |
Herbert Xu | 420a4b2 | 2008-08-31 15:58:45 +1000 | [diff] [blame] | 111 | int cpu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | |
Herbert Xu | 560c06a | 2006-08-13 14:16:39 +1000 | [diff] [blame] | 113 | if (key_len % 8) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN; |
| 115 | return -EINVAL; |
| 116 | } |
| 117 | |
Herbert Xu | 6789b2d | 2005-07-06 13:52:27 -0700 | [diff] [blame] | 118 | /* |
| 119 | * If the hardware is capable of generating the extended key |
| 120 | * itself we must supply the plain key for both encryption |
| 121 | * and decryption. |
| 122 | */ |
Herbert Xu | 82062c7 | 2006-05-16 22:20:34 +1000 | [diff] [blame] | 123 | ctx->D = ctx->E; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | |
Sebastian Siewior | 7dc748e | 2008-04-01 21:24:50 +0800 | [diff] [blame] | 125 | ctx->E[0] = le32_to_cpu(key[0]); |
| 126 | ctx->E[1] = le32_to_cpu(key[1]); |
| 127 | ctx->E[2] = le32_to_cpu(key[2]); |
| 128 | ctx->E[3] = le32_to_cpu(key[3]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | |
Herbert Xu | 6789b2d | 2005-07-06 13:52:27 -0700 | [diff] [blame] | 130 | /* Prepare control words. */ |
| 131 | memset(&ctx->cword, 0, sizeof(ctx->cword)); |
| 132 | |
| 133 | ctx->cword.decrypt.encdec = 1; |
| 134 | ctx->cword.encrypt.rounds = 10 + (key_len - 16) / 4; |
| 135 | ctx->cword.decrypt.rounds = ctx->cword.encrypt.rounds; |
| 136 | ctx->cword.encrypt.ksize = (key_len - 16) / 8; |
| 137 | ctx->cword.decrypt.ksize = ctx->cword.encrypt.ksize; |
| 138 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | /* Don't generate extended keys if the hardware can do it. */ |
| 140 | if (aes_hw_extkey_available(key_len)) |
Herbert Xu | 420a4b2 | 2008-08-31 15:58:45 +1000 | [diff] [blame] | 141 | goto ok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | |
Herbert Xu | 6789b2d | 2005-07-06 13:52:27 -0700 | [diff] [blame] | 143 | ctx->D = ctx->d_data; |
| 144 | ctx->cword.encrypt.keygen = 1; |
| 145 | ctx->cword.decrypt.keygen = 1; |
| 146 | |
Sebastian Siewior | 7dc748e | 2008-04-01 21:24:50 +0800 | [diff] [blame] | 147 | if (crypto_aes_expand_key(&gen_aes, in_key, key_len)) { |
| 148 | *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN; |
| 149 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | } |
| 151 | |
Sebastian Siewior | 7dc748e | 2008-04-01 21:24:50 +0800 | [diff] [blame] | 152 | memcpy(ctx->E, gen_aes.key_enc, AES_MAX_KEYLENGTH); |
| 153 | memcpy(ctx->D, gen_aes.key_dec, AES_MAX_KEYLENGTH); |
Herbert Xu | 420a4b2 | 2008-08-31 15:58:45 +1000 | [diff] [blame] | 154 | |
| 155 | ok: |
| 156 | for_each_online_cpu(cpu) |
Tejun Heo | 390dfd9 | 2009-10-29 22:34:14 +0900 | [diff] [blame] | 157 | if (&ctx->cword.encrypt == per_cpu(paes_last_cword, cpu) || |
| 158 | &ctx->cword.decrypt == per_cpu(paes_last_cword, cpu)) |
| 159 | per_cpu(paes_last_cword, cpu) = NULL; |
Herbert Xu | 420a4b2 | 2008-08-31 15:58:45 +1000 | [diff] [blame] | 160 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | return 0; |
| 162 | } |
| 163 | |
| 164 | /* ====== Encryption/decryption routines ====== */ |
| 165 | |
Herbert Xu | 28e8c3a | 2005-07-06 13:52:43 -0700 | [diff] [blame] | 166 | /* These are the real call to PadLock. */ |
Herbert Xu | 420a4b2 | 2008-08-31 15:58:45 +1000 | [diff] [blame] | 167 | static inline void padlock_reset_key(struct cword *cword) |
Herbert Xu | 866cd90 | 2007-12-27 00:04:44 +1100 | [diff] [blame] | 168 | { |
Herbert Xu | 420a4b2 | 2008-08-31 15:58:45 +1000 | [diff] [blame] | 169 | int cpu = raw_smp_processor_id(); |
| 170 | |
Tejun Heo | 390dfd9 | 2009-10-29 22:34:14 +0900 | [diff] [blame] | 171 | if (cword != per_cpu(paes_last_cword, cpu)) |
Sebastian Andrzej Siewior | d1c8b0a | 2009-04-21 14:14:37 +0800 | [diff] [blame] | 172 | #ifndef CONFIG_X86_64 |
Herbert Xu | 420a4b2 | 2008-08-31 15:58:45 +1000 | [diff] [blame] | 173 | asm volatile ("pushfl; popfl"); |
Sebastian Andrzej Siewior | d1c8b0a | 2009-04-21 14:14:37 +0800 | [diff] [blame] | 174 | #else |
| 175 | asm volatile ("pushfq; popfq"); |
| 176 | #endif |
Herbert Xu | 420a4b2 | 2008-08-31 15:58:45 +1000 | [diff] [blame] | 177 | } |
| 178 | |
| 179 | static inline void padlock_store_cword(struct cword *cword) |
| 180 | { |
Tejun Heo | 390dfd9 | 2009-10-29 22:34:14 +0900 | [diff] [blame] | 181 | per_cpu(paes_last_cword, raw_smp_processor_id()) = cword; |
Herbert Xu | 866cd90 | 2007-12-27 00:04:44 +1100 | [diff] [blame] | 182 | } |
| 183 | |
Suresh Siddha | e491401 | 2008-08-13 22:02:26 +1000 | [diff] [blame] | 184 | /* |
| 185 | * While the padlock instructions don't use FP/SSE registers, they |
| 186 | * generate a spurious DNA fault when cr0.ts is '1'. These instructions |
| 187 | * should be used only inside the irq_ts_save/restore() context |
| 188 | */ |
| 189 | |
Chuck Ebbert | 8d8409f | 2009-06-18 19:31:09 +0800 | [diff] [blame] | 190 | static inline void rep_xcrypt_ecb(const u8 *input, u8 *output, void *key, |
Chuck Ebbert | a76c1c2 | 2009-06-18 19:24:10 +0800 | [diff] [blame] | 191 | struct cword *control_word, int count) |
Herbert Xu | d4a7dd8 | 2007-12-28 11:05:46 +1100 | [diff] [blame] | 192 | { |
| 193 | asm volatile (".byte 0xf3,0x0f,0xa7,0xc8" /* rep xcryptecb */ |
| 194 | : "+S"(input), "+D"(output) |
Chuck Ebbert | a76c1c2 | 2009-06-18 19:24:10 +0800 | [diff] [blame] | 195 | : "d"(control_word), "b"(key), "c"(count)); |
Herbert Xu | d4a7dd8 | 2007-12-28 11:05:46 +1100 | [diff] [blame] | 196 | } |
| 197 | |
Chuck Ebbert | 8d8409f | 2009-06-18 19:31:09 +0800 | [diff] [blame] | 198 | static inline u8 *rep_xcrypt_cbc(const u8 *input, u8 *output, void *key, |
| 199 | u8 *iv, struct cword *control_word, int count) |
| 200 | { |
| 201 | asm volatile (".byte 0xf3,0x0f,0xa7,0xd0" /* rep xcryptcbc */ |
| 202 | : "+S" (input), "+D" (output), "+a" (iv) |
| 203 | : "d" (control_word), "b" (key), "c" (count)); |
| 204 | return iv; |
| 205 | } |
| 206 | |
| 207 | static void ecb_crypt_copy(const u8 *in, u8 *out, u32 *key, |
Chuck Ebbert | a76c1c2 | 2009-06-18 19:24:10 +0800 | [diff] [blame] | 208 | struct cword *cword, int count) |
Herbert Xu | d4a7dd8 | 2007-12-28 11:05:46 +1100 | [diff] [blame] | 209 | { |
Chuck Ebbert | a76c1c2 | 2009-06-18 19:24:10 +0800 | [diff] [blame] | 210 | /* |
| 211 | * Padlock prefetches extra data so we must provide mapped input buffers. |
| 212 | * Assume there are at least 16 bytes of stack already in use. |
| 213 | */ |
Chuck Ebbert | 8d8409f | 2009-06-18 19:31:09 +0800 | [diff] [blame] | 214 | u8 buf[AES_BLOCK_SIZE * (MAX_ECB_FETCH_BLOCKS - 1) + PADLOCK_ALIGNMENT - 1]; |
Herbert Xu | 490fe3f | 2008-01-11 08:09:35 +1100 | [diff] [blame] | 215 | u8 *tmp = PTR_ALIGN(&buf[0], PADLOCK_ALIGNMENT); |
Herbert Xu | d4a7dd8 | 2007-12-28 11:05:46 +1100 | [diff] [blame] | 216 | |
Chuck Ebbert | a76c1c2 | 2009-06-18 19:24:10 +0800 | [diff] [blame] | 217 | memcpy(tmp, in, count * AES_BLOCK_SIZE); |
Chuck Ebbert | 8d8409f | 2009-06-18 19:31:09 +0800 | [diff] [blame] | 218 | rep_xcrypt_ecb(tmp, out, key, cword, count); |
Herbert Xu | d4a7dd8 | 2007-12-28 11:05:46 +1100 | [diff] [blame] | 219 | } |
| 220 | |
Chuck Ebbert | 8d8409f | 2009-06-18 19:31:09 +0800 | [diff] [blame] | 221 | static u8 *cbc_crypt_copy(const u8 *in, u8 *out, u32 *key, |
| 222 | u8 *iv, struct cword *cword, int count) |
| 223 | { |
| 224 | /* |
| 225 | * Padlock prefetches extra data so we must provide mapped input buffers. |
| 226 | * Assume there are at least 16 bytes of stack already in use. |
| 227 | */ |
| 228 | u8 buf[AES_BLOCK_SIZE * (MAX_CBC_FETCH_BLOCKS - 1) + PADLOCK_ALIGNMENT - 1]; |
| 229 | u8 *tmp = PTR_ALIGN(&buf[0], PADLOCK_ALIGNMENT); |
| 230 | |
| 231 | memcpy(tmp, in, count * AES_BLOCK_SIZE); |
| 232 | return rep_xcrypt_cbc(tmp, out, key, iv, cword, count); |
| 233 | } |
| 234 | |
| 235 | static inline void ecb_crypt(const u8 *in, u8 *out, u32 *key, |
Chuck Ebbert | a76c1c2 | 2009-06-18 19:24:10 +0800 | [diff] [blame] | 236 | struct cword *cword, int count) |
Herbert Xu | d4a7dd8 | 2007-12-28 11:05:46 +1100 | [diff] [blame] | 237 | { |
Chuck Ebbert | a76c1c2 | 2009-06-18 19:24:10 +0800 | [diff] [blame] | 238 | /* Padlock in ECB mode fetches at least ecb_fetch_bytes of data. |
| 239 | * We could avoid some copying here but it's probably not worth it. |
| 240 | */ |
Chuck Ebbert | e8edb3c | 2009-11-03 10:32:03 -0500 | [diff] [blame] | 241 | if (unlikely(((unsigned long)in & ~PAGE_MASK) + ecb_fetch_bytes > PAGE_SIZE)) { |
Chuck Ebbert | 8d8409f | 2009-06-18 19:31:09 +0800 | [diff] [blame] | 242 | ecb_crypt_copy(in, out, key, cword, count); |
Herbert Xu | d4a7dd8 | 2007-12-28 11:05:46 +1100 | [diff] [blame] | 243 | return; |
| 244 | } |
| 245 | |
Chuck Ebbert | 8d8409f | 2009-06-18 19:31:09 +0800 | [diff] [blame] | 246 | rep_xcrypt_ecb(in, out, key, cword, count); |
| 247 | } |
| 248 | |
| 249 | static inline u8 *cbc_crypt(const u8 *in, u8 *out, u32 *key, |
| 250 | u8 *iv, struct cword *cword, int count) |
| 251 | { |
| 252 | /* Padlock in CBC mode fetches at least cbc_fetch_bytes of data. */ |
Chuck Ebbert | e8edb3c | 2009-11-03 10:32:03 -0500 | [diff] [blame] | 253 | if (unlikely(((unsigned long)in & ~PAGE_MASK) + cbc_fetch_bytes > PAGE_SIZE)) |
Chuck Ebbert | 8d8409f | 2009-06-18 19:31:09 +0800 | [diff] [blame] | 254 | return cbc_crypt_copy(in, out, key, iv, cword, count); |
| 255 | |
| 256 | return rep_xcrypt_cbc(in, out, key, iv, cword, count); |
Herbert Xu | d4a7dd8 | 2007-12-28 11:05:46 +1100 | [diff] [blame] | 257 | } |
| 258 | |
Herbert Xu | 6789b2d | 2005-07-06 13:52:27 -0700 | [diff] [blame] | 259 | static inline void padlock_xcrypt_ecb(const u8 *input, u8 *output, void *key, |
| 260 | void *control_word, u32 count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | { |
Chuck Ebbert | a76c1c2 | 2009-06-18 19:24:10 +0800 | [diff] [blame] | 262 | u32 initial = count & (ecb_fetch_blocks - 1); |
| 263 | |
| 264 | if (count < ecb_fetch_blocks) { |
Chuck Ebbert | 8d8409f | 2009-06-18 19:31:09 +0800 | [diff] [blame] | 265 | ecb_crypt(input, output, key, control_word, count); |
Herbert Xu | d4a7dd8 | 2007-12-28 11:05:46 +1100 | [diff] [blame] | 266 | return; |
| 267 | } |
| 268 | |
Chuck Ebbert | a76c1c2 | 2009-06-18 19:24:10 +0800 | [diff] [blame] | 269 | if (initial) |
| 270 | asm volatile (".byte 0xf3,0x0f,0xa7,0xc8" /* rep xcryptecb */ |
| 271 | : "+S"(input), "+D"(output) |
| 272 | : "d"(control_word), "b"(key), "c"(initial)); |
| 273 | |
| 274 | asm volatile (".byte 0xf3,0x0f,0xa7,0xc8" /* rep xcryptecb */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | : "+S"(input), "+D"(output) |
Chuck Ebbert | a76c1c2 | 2009-06-18 19:24:10 +0800 | [diff] [blame] | 276 | : "d"(control_word), "b"(key), "c"(count - initial)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | } |
| 278 | |
Herbert Xu | 476df25 | 2005-07-06 13:54:09 -0700 | [diff] [blame] | 279 | static inline u8 *padlock_xcrypt_cbc(const u8 *input, u8 *output, void *key, |
| 280 | u8 *iv, void *control_word, u32 count) |
Herbert Xu | 28e8c3a | 2005-07-06 13:52:43 -0700 | [diff] [blame] | 281 | { |
Chuck Ebbert | 8d8409f | 2009-06-18 19:31:09 +0800 | [diff] [blame] | 282 | u32 initial = count & (cbc_fetch_blocks - 1); |
| 283 | |
| 284 | if (count < cbc_fetch_blocks) |
| 285 | return cbc_crypt(input, output, key, iv, control_word, count); |
| 286 | |
| 287 | if (initial) |
| 288 | asm volatile (".byte 0xf3,0x0f,0xa7,0xd0" /* rep xcryptcbc */ |
| 289 | : "+S" (input), "+D" (output), "+a" (iv) |
Herbert Xu | c054a07 | 2010-11-04 14:38:39 -0400 | [diff] [blame] | 290 | : "d" (control_word), "b" (key), "c" (initial)); |
Chuck Ebbert | 8d8409f | 2009-06-18 19:31:09 +0800 | [diff] [blame] | 291 | |
| 292 | asm volatile (".byte 0xf3,0x0f,0xa7,0xd0" /* rep xcryptcbc */ |
Herbert Xu | 28e8c3a | 2005-07-06 13:52:43 -0700 | [diff] [blame] | 293 | : "+S" (input), "+D" (output), "+a" (iv) |
Chuck Ebbert | 8d8409f | 2009-06-18 19:31:09 +0800 | [diff] [blame] | 294 | : "d" (control_word), "b" (key), "c" (count-initial)); |
Herbert Xu | 476df25 | 2005-07-06 13:54:09 -0700 | [diff] [blame] | 295 | return iv; |
Herbert Xu | 28e8c3a | 2005-07-06 13:52:43 -0700 | [diff] [blame] | 296 | } |
| 297 | |
Herbert Xu | 6c2bb98 | 2006-05-16 22:09:29 +1000 | [diff] [blame] | 298 | static void aes_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | { |
Herbert Xu | 6c2bb98 | 2006-05-16 22:09:29 +1000 | [diff] [blame] | 300 | struct aes_ctx *ctx = aes_ctx(tfm); |
Suresh Siddha | e491401 | 2008-08-13 22:02:26 +1000 | [diff] [blame] | 301 | int ts_state; |
Suresh Siddha | e491401 | 2008-08-13 22:02:26 +1000 | [diff] [blame] | 302 | |
Herbert Xu | 420a4b2 | 2008-08-31 15:58:45 +1000 | [diff] [blame] | 303 | padlock_reset_key(&ctx->cword.encrypt); |
Suresh Siddha | e491401 | 2008-08-13 22:02:26 +1000 | [diff] [blame] | 304 | ts_state = irq_ts_save(); |
Chuck Ebbert | 8d8409f | 2009-06-18 19:31:09 +0800 | [diff] [blame] | 305 | ecb_crypt(in, out, ctx->E, &ctx->cword.encrypt, 1); |
Suresh Siddha | e491401 | 2008-08-13 22:02:26 +1000 | [diff] [blame] | 306 | irq_ts_restore(ts_state); |
Herbert Xu | 420a4b2 | 2008-08-31 15:58:45 +1000 | [diff] [blame] | 307 | padlock_store_cword(&ctx->cword.encrypt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | } |
| 309 | |
Herbert Xu | 6c2bb98 | 2006-05-16 22:09:29 +1000 | [diff] [blame] | 310 | static void aes_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | { |
Herbert Xu | 6c2bb98 | 2006-05-16 22:09:29 +1000 | [diff] [blame] | 312 | struct aes_ctx *ctx = aes_ctx(tfm); |
Suresh Siddha | e491401 | 2008-08-13 22:02:26 +1000 | [diff] [blame] | 313 | int ts_state; |
Suresh Siddha | e491401 | 2008-08-13 22:02:26 +1000 | [diff] [blame] | 314 | |
Herbert Xu | 420a4b2 | 2008-08-31 15:58:45 +1000 | [diff] [blame] | 315 | padlock_reset_key(&ctx->cword.encrypt); |
Suresh Siddha | e491401 | 2008-08-13 22:02:26 +1000 | [diff] [blame] | 316 | ts_state = irq_ts_save(); |
Chuck Ebbert | 8d8409f | 2009-06-18 19:31:09 +0800 | [diff] [blame] | 317 | ecb_crypt(in, out, ctx->D, &ctx->cword.decrypt, 1); |
Suresh Siddha | e491401 | 2008-08-13 22:02:26 +1000 | [diff] [blame] | 318 | irq_ts_restore(ts_state); |
Herbert Xu | 420a4b2 | 2008-08-31 15:58:45 +1000 | [diff] [blame] | 319 | padlock_store_cword(&ctx->cword.encrypt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | } |
| 321 | |
| 322 | static struct crypto_alg aes_alg = { |
| 323 | .cra_name = "aes", |
Herbert Xu | c8a19c9 | 2005-11-05 18:06:26 +1100 | [diff] [blame] | 324 | .cra_driver_name = "aes-padlock", |
Michal Ludvig | ccc17c3 | 2006-07-15 10:23:49 +1000 | [diff] [blame] | 325 | .cra_priority = PADLOCK_CRA_PRIORITY, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | .cra_flags = CRYPTO_ALG_TYPE_CIPHER, |
| 327 | .cra_blocksize = AES_BLOCK_SIZE, |
Herbert Xu | fbdae9f | 2005-07-06 13:53:29 -0700 | [diff] [blame] | 328 | .cra_ctxsize = sizeof(struct aes_ctx), |
Herbert Xu | 6789b2d | 2005-07-06 13:52:27 -0700 | [diff] [blame] | 329 | .cra_alignmask = PADLOCK_ALIGNMENT - 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | .cra_module = THIS_MODULE, |
| 331 | .cra_list = LIST_HEAD_INIT(aes_alg.cra_list), |
| 332 | .cra_u = { |
| 333 | .cipher = { |
| 334 | .cia_min_keysize = AES_MIN_KEY_SIZE, |
| 335 | .cia_max_keysize = AES_MAX_KEY_SIZE, |
| 336 | .cia_setkey = aes_set_key, |
| 337 | .cia_encrypt = aes_encrypt, |
Herbert Xu | 28e8c3a | 2005-07-06 13:52:43 -0700 | [diff] [blame] | 338 | .cia_decrypt = aes_decrypt, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | } |
| 340 | } |
| 341 | }; |
| 342 | |
Herbert Xu | 28ce728 | 2006-08-21 21:38:42 +1000 | [diff] [blame] | 343 | static int ecb_aes_encrypt(struct blkcipher_desc *desc, |
| 344 | struct scatterlist *dst, struct scatterlist *src, |
| 345 | unsigned int nbytes) |
| 346 | { |
| 347 | struct aes_ctx *ctx = blk_aes_ctx(desc->tfm); |
| 348 | struct blkcipher_walk walk; |
| 349 | int err; |
Suresh Siddha | e491401 | 2008-08-13 22:02:26 +1000 | [diff] [blame] | 350 | int ts_state; |
Herbert Xu | 28ce728 | 2006-08-21 21:38:42 +1000 | [diff] [blame] | 351 | |
Herbert Xu | 420a4b2 | 2008-08-31 15:58:45 +1000 | [diff] [blame] | 352 | padlock_reset_key(&ctx->cword.encrypt); |
Herbert Xu | 866cd90 | 2007-12-27 00:04:44 +1100 | [diff] [blame] | 353 | |
Herbert Xu | 28ce728 | 2006-08-21 21:38:42 +1000 | [diff] [blame] | 354 | blkcipher_walk_init(&walk, dst, src, nbytes); |
| 355 | err = blkcipher_walk_virt(desc, &walk); |
| 356 | |
Suresh Siddha | e491401 | 2008-08-13 22:02:26 +1000 | [diff] [blame] | 357 | ts_state = irq_ts_save(); |
Herbert Xu | 28ce728 | 2006-08-21 21:38:42 +1000 | [diff] [blame] | 358 | while ((nbytes = walk.nbytes)) { |
| 359 | padlock_xcrypt_ecb(walk.src.virt.addr, walk.dst.virt.addr, |
| 360 | ctx->E, &ctx->cword.encrypt, |
| 361 | nbytes / AES_BLOCK_SIZE); |
| 362 | nbytes &= AES_BLOCK_SIZE - 1; |
| 363 | err = blkcipher_walk_done(desc, &walk, nbytes); |
| 364 | } |
Suresh Siddha | e491401 | 2008-08-13 22:02:26 +1000 | [diff] [blame] | 365 | irq_ts_restore(ts_state); |
Herbert Xu | 28ce728 | 2006-08-21 21:38:42 +1000 | [diff] [blame] | 366 | |
Herbert Xu | 420a4b2 | 2008-08-31 15:58:45 +1000 | [diff] [blame] | 367 | padlock_store_cword(&ctx->cword.encrypt); |
| 368 | |
Herbert Xu | 28ce728 | 2006-08-21 21:38:42 +1000 | [diff] [blame] | 369 | return err; |
| 370 | } |
| 371 | |
| 372 | static int ecb_aes_decrypt(struct blkcipher_desc *desc, |
| 373 | struct scatterlist *dst, struct scatterlist *src, |
| 374 | unsigned int nbytes) |
| 375 | { |
| 376 | struct aes_ctx *ctx = blk_aes_ctx(desc->tfm); |
| 377 | struct blkcipher_walk walk; |
| 378 | int err; |
Suresh Siddha | e491401 | 2008-08-13 22:02:26 +1000 | [diff] [blame] | 379 | int ts_state; |
Herbert Xu | 28ce728 | 2006-08-21 21:38:42 +1000 | [diff] [blame] | 380 | |
Herbert Xu | 420a4b2 | 2008-08-31 15:58:45 +1000 | [diff] [blame] | 381 | padlock_reset_key(&ctx->cword.decrypt); |
Herbert Xu | 866cd90 | 2007-12-27 00:04:44 +1100 | [diff] [blame] | 382 | |
Herbert Xu | 28ce728 | 2006-08-21 21:38:42 +1000 | [diff] [blame] | 383 | blkcipher_walk_init(&walk, dst, src, nbytes); |
| 384 | err = blkcipher_walk_virt(desc, &walk); |
| 385 | |
Suresh Siddha | e491401 | 2008-08-13 22:02:26 +1000 | [diff] [blame] | 386 | ts_state = irq_ts_save(); |
Herbert Xu | 28ce728 | 2006-08-21 21:38:42 +1000 | [diff] [blame] | 387 | while ((nbytes = walk.nbytes)) { |
| 388 | padlock_xcrypt_ecb(walk.src.virt.addr, walk.dst.virt.addr, |
| 389 | ctx->D, &ctx->cword.decrypt, |
| 390 | nbytes / AES_BLOCK_SIZE); |
| 391 | nbytes &= AES_BLOCK_SIZE - 1; |
| 392 | err = blkcipher_walk_done(desc, &walk, nbytes); |
| 393 | } |
Suresh Siddha | e491401 | 2008-08-13 22:02:26 +1000 | [diff] [blame] | 394 | irq_ts_restore(ts_state); |
Herbert Xu | 420a4b2 | 2008-08-31 15:58:45 +1000 | [diff] [blame] | 395 | |
| 396 | padlock_store_cword(&ctx->cword.encrypt); |
| 397 | |
Herbert Xu | 28ce728 | 2006-08-21 21:38:42 +1000 | [diff] [blame] | 398 | return err; |
| 399 | } |
| 400 | |
| 401 | static struct crypto_alg ecb_aes_alg = { |
| 402 | .cra_name = "ecb(aes)", |
| 403 | .cra_driver_name = "ecb-aes-padlock", |
| 404 | .cra_priority = PADLOCK_COMPOSITE_PRIORITY, |
| 405 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, |
| 406 | .cra_blocksize = AES_BLOCK_SIZE, |
| 407 | .cra_ctxsize = sizeof(struct aes_ctx), |
| 408 | .cra_alignmask = PADLOCK_ALIGNMENT - 1, |
| 409 | .cra_type = &crypto_blkcipher_type, |
| 410 | .cra_module = THIS_MODULE, |
| 411 | .cra_list = LIST_HEAD_INIT(ecb_aes_alg.cra_list), |
| 412 | .cra_u = { |
| 413 | .blkcipher = { |
| 414 | .min_keysize = AES_MIN_KEY_SIZE, |
| 415 | .max_keysize = AES_MAX_KEY_SIZE, |
| 416 | .setkey = aes_set_key, |
| 417 | .encrypt = ecb_aes_encrypt, |
| 418 | .decrypt = ecb_aes_decrypt, |
| 419 | } |
| 420 | } |
| 421 | }; |
| 422 | |
| 423 | static int cbc_aes_encrypt(struct blkcipher_desc *desc, |
| 424 | struct scatterlist *dst, struct scatterlist *src, |
| 425 | unsigned int nbytes) |
| 426 | { |
| 427 | struct aes_ctx *ctx = blk_aes_ctx(desc->tfm); |
| 428 | struct blkcipher_walk walk; |
| 429 | int err; |
Suresh Siddha | e491401 | 2008-08-13 22:02:26 +1000 | [diff] [blame] | 430 | int ts_state; |
Herbert Xu | 28ce728 | 2006-08-21 21:38:42 +1000 | [diff] [blame] | 431 | |
Herbert Xu | 420a4b2 | 2008-08-31 15:58:45 +1000 | [diff] [blame] | 432 | padlock_reset_key(&ctx->cword.encrypt); |
Herbert Xu | 866cd90 | 2007-12-27 00:04:44 +1100 | [diff] [blame] | 433 | |
Herbert Xu | 28ce728 | 2006-08-21 21:38:42 +1000 | [diff] [blame] | 434 | blkcipher_walk_init(&walk, dst, src, nbytes); |
| 435 | err = blkcipher_walk_virt(desc, &walk); |
| 436 | |
Suresh Siddha | e491401 | 2008-08-13 22:02:26 +1000 | [diff] [blame] | 437 | ts_state = irq_ts_save(); |
Herbert Xu | 28ce728 | 2006-08-21 21:38:42 +1000 | [diff] [blame] | 438 | while ((nbytes = walk.nbytes)) { |
| 439 | u8 *iv = padlock_xcrypt_cbc(walk.src.virt.addr, |
| 440 | walk.dst.virt.addr, ctx->E, |
| 441 | walk.iv, &ctx->cword.encrypt, |
| 442 | nbytes / AES_BLOCK_SIZE); |
| 443 | memcpy(walk.iv, iv, AES_BLOCK_SIZE); |
| 444 | nbytes &= AES_BLOCK_SIZE - 1; |
| 445 | err = blkcipher_walk_done(desc, &walk, nbytes); |
| 446 | } |
Suresh Siddha | e491401 | 2008-08-13 22:02:26 +1000 | [diff] [blame] | 447 | irq_ts_restore(ts_state); |
Herbert Xu | 28ce728 | 2006-08-21 21:38:42 +1000 | [diff] [blame] | 448 | |
Herbert Xu | 420a4b2 | 2008-08-31 15:58:45 +1000 | [diff] [blame] | 449 | padlock_store_cword(&ctx->cword.decrypt); |
| 450 | |
Herbert Xu | 28ce728 | 2006-08-21 21:38:42 +1000 | [diff] [blame] | 451 | return err; |
| 452 | } |
| 453 | |
| 454 | static int cbc_aes_decrypt(struct blkcipher_desc *desc, |
| 455 | struct scatterlist *dst, struct scatterlist *src, |
| 456 | unsigned int nbytes) |
| 457 | { |
| 458 | struct aes_ctx *ctx = blk_aes_ctx(desc->tfm); |
| 459 | struct blkcipher_walk walk; |
| 460 | int err; |
Suresh Siddha | e491401 | 2008-08-13 22:02:26 +1000 | [diff] [blame] | 461 | int ts_state; |
Herbert Xu | 28ce728 | 2006-08-21 21:38:42 +1000 | [diff] [blame] | 462 | |
Herbert Xu | 420a4b2 | 2008-08-31 15:58:45 +1000 | [diff] [blame] | 463 | padlock_reset_key(&ctx->cword.encrypt); |
Herbert Xu | 866cd90 | 2007-12-27 00:04:44 +1100 | [diff] [blame] | 464 | |
Herbert Xu | 28ce728 | 2006-08-21 21:38:42 +1000 | [diff] [blame] | 465 | blkcipher_walk_init(&walk, dst, src, nbytes); |
| 466 | err = blkcipher_walk_virt(desc, &walk); |
| 467 | |
Suresh Siddha | e491401 | 2008-08-13 22:02:26 +1000 | [diff] [blame] | 468 | ts_state = irq_ts_save(); |
Herbert Xu | 28ce728 | 2006-08-21 21:38:42 +1000 | [diff] [blame] | 469 | while ((nbytes = walk.nbytes)) { |
| 470 | padlock_xcrypt_cbc(walk.src.virt.addr, walk.dst.virt.addr, |
| 471 | ctx->D, walk.iv, &ctx->cword.decrypt, |
| 472 | nbytes / AES_BLOCK_SIZE); |
| 473 | nbytes &= AES_BLOCK_SIZE - 1; |
| 474 | err = blkcipher_walk_done(desc, &walk, nbytes); |
| 475 | } |
| 476 | |
Suresh Siddha | e491401 | 2008-08-13 22:02:26 +1000 | [diff] [blame] | 477 | irq_ts_restore(ts_state); |
Herbert Xu | 420a4b2 | 2008-08-31 15:58:45 +1000 | [diff] [blame] | 478 | |
| 479 | padlock_store_cword(&ctx->cword.encrypt); |
| 480 | |
Herbert Xu | 28ce728 | 2006-08-21 21:38:42 +1000 | [diff] [blame] | 481 | return err; |
| 482 | } |
| 483 | |
| 484 | static struct crypto_alg cbc_aes_alg = { |
| 485 | .cra_name = "cbc(aes)", |
| 486 | .cra_driver_name = "cbc-aes-padlock", |
| 487 | .cra_priority = PADLOCK_COMPOSITE_PRIORITY, |
| 488 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, |
| 489 | .cra_blocksize = AES_BLOCK_SIZE, |
| 490 | .cra_ctxsize = sizeof(struct aes_ctx), |
| 491 | .cra_alignmask = PADLOCK_ALIGNMENT - 1, |
| 492 | .cra_type = &crypto_blkcipher_type, |
| 493 | .cra_module = THIS_MODULE, |
| 494 | .cra_list = LIST_HEAD_INIT(cbc_aes_alg.cra_list), |
| 495 | .cra_u = { |
| 496 | .blkcipher = { |
| 497 | .min_keysize = AES_MIN_KEY_SIZE, |
| 498 | .max_keysize = AES_MAX_KEY_SIZE, |
| 499 | .ivsize = AES_BLOCK_SIZE, |
| 500 | .setkey = aes_set_key, |
| 501 | .encrypt = cbc_aes_encrypt, |
| 502 | .decrypt = cbc_aes_decrypt, |
| 503 | } |
| 504 | } |
| 505 | }; |
| 506 | |
Andi Kleen | 3bd391f | 2012-01-26 00:09:06 +0100 | [diff] [blame] | 507 | static struct x86_cpu_id padlock_cpu_id[] = { |
| 508 | X86_FEATURE_MATCH(X86_FEATURE_XCRYPT), |
| 509 | {} |
| 510 | }; |
| 511 | MODULE_DEVICE_TABLE(x86cpu, padlock_cpu_id); |
| 512 | |
Michal Ludvig | 1191f0a | 2006-08-06 22:46:20 +1000 | [diff] [blame] | 513 | static int __init padlock_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | { |
Michal Ludvig | 1191f0a | 2006-08-06 22:46:20 +1000 | [diff] [blame] | 515 | int ret; |
Chuck Ebbert | a76c1c2 | 2009-06-18 19:24:10 +0800 | [diff] [blame] | 516 | struct cpuinfo_x86 *c = &cpu_data(0); |
Michal Ludvig | 1191f0a | 2006-08-06 22:46:20 +1000 | [diff] [blame] | 517 | |
Andi Kleen | 3bd391f | 2012-01-26 00:09:06 +0100 | [diff] [blame] | 518 | if (!x86_match_cpu(padlock_cpu_id)) |
Michal Ludvig | 1191f0a | 2006-08-06 22:46:20 +1000 | [diff] [blame] | 519 | return -ENODEV; |
Michal Ludvig | 1191f0a | 2006-08-06 22:46:20 +1000 | [diff] [blame] | 520 | |
| 521 | if (!cpu_has_xcrypt_enabled) { |
Jeremy Katz | b43e726 | 2008-07-03 19:03:31 +0800 | [diff] [blame] | 522 | printk(KERN_NOTICE PFX "VIA PadLock detected, but not enabled. Hmm, strange...\n"); |
Michal Ludvig | 1191f0a | 2006-08-06 22:46:20 +1000 | [diff] [blame] | 523 | return -ENODEV; |
| 524 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | |
Herbert Xu | 28ce728 | 2006-08-21 21:38:42 +1000 | [diff] [blame] | 526 | if ((ret = crypto_register_alg(&aes_alg))) |
| 527 | goto aes_err; |
| 528 | |
| 529 | if ((ret = crypto_register_alg(&ecb_aes_alg))) |
| 530 | goto ecb_aes_err; |
| 531 | |
| 532 | if ((ret = crypto_register_alg(&cbc_aes_alg))) |
| 533 | goto cbc_aes_err; |
Michal Ludvig | 1191f0a | 2006-08-06 22:46:20 +1000 | [diff] [blame] | 534 | |
| 535 | printk(KERN_NOTICE PFX "Using VIA PadLock ACE for AES algorithm.\n"); |
| 536 | |
Chuck Ebbert | a76c1c2 | 2009-06-18 19:24:10 +0800 | [diff] [blame] | 537 | if (c->x86 == 6 && c->x86_model == 15 && c->x86_mask == 2) { |
Chuck Ebbert | 8d8409f | 2009-06-18 19:31:09 +0800 | [diff] [blame] | 538 | ecb_fetch_blocks = MAX_ECB_FETCH_BLOCKS; |
| 539 | cbc_fetch_blocks = MAX_CBC_FETCH_BLOCKS; |
Chuck Ebbert | a76c1c2 | 2009-06-18 19:24:10 +0800 | [diff] [blame] | 540 | printk(KERN_NOTICE PFX "VIA Nano stepping 2 detected: enabling workaround.\n"); |
| 541 | } |
| 542 | |
Herbert Xu | 28ce728 | 2006-08-21 21:38:42 +1000 | [diff] [blame] | 543 | out: |
Michal Ludvig | 1191f0a | 2006-08-06 22:46:20 +1000 | [diff] [blame] | 544 | return ret; |
Herbert Xu | 28ce728 | 2006-08-21 21:38:42 +1000 | [diff] [blame] | 545 | |
| 546 | cbc_aes_err: |
| 547 | crypto_unregister_alg(&ecb_aes_alg); |
| 548 | ecb_aes_err: |
| 549 | crypto_unregister_alg(&aes_alg); |
| 550 | aes_err: |
| 551 | printk(KERN_ERR PFX "VIA PadLock AES initialization failed.\n"); |
| 552 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | } |
| 554 | |
Michal Ludvig | 1191f0a | 2006-08-06 22:46:20 +1000 | [diff] [blame] | 555 | static void __exit padlock_fini(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | { |
Herbert Xu | 28ce728 | 2006-08-21 21:38:42 +1000 | [diff] [blame] | 557 | crypto_unregister_alg(&cbc_aes_alg); |
| 558 | crypto_unregister_alg(&ecb_aes_alg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | crypto_unregister_alg(&aes_alg); |
| 560 | } |
Michal Ludvig | 1191f0a | 2006-08-06 22:46:20 +1000 | [diff] [blame] | 561 | |
| 562 | module_init(padlock_init); |
| 563 | module_exit(padlock_fini); |
| 564 | |
| 565 | MODULE_DESCRIPTION("VIA PadLock AES algorithm support"); |
| 566 | MODULE_LICENSE("GPL"); |
| 567 | MODULE_AUTHOR("Michal Ludvig"); |
| 568 | |
Herbert Xu | acd246b | 2009-04-21 13:55:20 +0800 | [diff] [blame] | 569 | MODULE_ALIAS("aes"); |