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crypto: vmx - Adding enable_kernel_vsx() to access VSX instructions
vmx-crypto driver make use of some VSX instructions which are only available if VSX is enabled. Running in cases where VSX are not enabled vmx-crypto fails in a VSX exception. In order to fix this enable_kernel_vsx() was added to turn on VSX instructions for vmx-crypto. Signed-off-by: Leonidas S. Barbosa <leosilva@linux.vnet.ibm.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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@ -84,6 +84,7 @@ static int p8_aes_setkey(struct crypto_tfm *tfm, const u8 *key,
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preempt_disable();
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pagefault_disable();
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enable_kernel_altivec();
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enable_kernel_vsx();
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ret = aes_p8_set_encrypt_key(key, keylen * 8, &ctx->enc_key);
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ret += aes_p8_set_decrypt_key(key, keylen * 8, &ctx->dec_key);
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pagefault_enable();
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@ -103,6 +104,7 @@ static void p8_aes_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
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preempt_disable();
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pagefault_disable();
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enable_kernel_altivec();
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enable_kernel_vsx();
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aes_p8_encrypt(src, dst, &ctx->enc_key);
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pagefault_enable();
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preempt_enable();
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@ -119,6 +121,7 @@ static void p8_aes_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
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preempt_disable();
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pagefault_disable();
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enable_kernel_altivec();
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enable_kernel_vsx();
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aes_p8_decrypt(src, dst, &ctx->dec_key);
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pagefault_enable();
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preempt_enable();
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@ -85,6 +85,7 @@ static int p8_aes_cbc_setkey(struct crypto_tfm *tfm, const u8 *key,
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preempt_disable();
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pagefault_disable();
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enable_kernel_altivec();
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enable_kernel_vsx();
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ret = aes_p8_set_encrypt_key(key, keylen * 8, &ctx->enc_key);
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ret += aes_p8_set_decrypt_key(key, keylen * 8, &ctx->dec_key);
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pagefault_enable();
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@ -115,6 +116,7 @@ static int p8_aes_cbc_encrypt(struct blkcipher_desc *desc,
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preempt_disable();
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pagefault_disable();
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enable_kernel_altivec();
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enable_kernel_vsx();
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blkcipher_walk_init(&walk, dst, src, nbytes);
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ret = blkcipher_walk_virt(desc, &walk);
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@ -155,6 +157,7 @@ static int p8_aes_cbc_decrypt(struct blkcipher_desc *desc,
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preempt_disable();
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pagefault_disable();
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enable_kernel_altivec();
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enable_kernel_vsx();
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blkcipher_walk_init(&walk, dst, src, nbytes);
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ret = blkcipher_walk_virt(desc, &walk);
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@ -82,6 +82,7 @@ static int p8_aes_ctr_setkey(struct crypto_tfm *tfm, const u8 *key,
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pagefault_disable();
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enable_kernel_altivec();
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enable_kernel_vsx();
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ret = aes_p8_set_encrypt_key(key, keylen * 8, &ctx->enc_key);
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pagefault_enable();
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@ -100,6 +101,7 @@ static void p8_aes_ctr_final(struct p8_aes_ctr_ctx *ctx,
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pagefault_disable();
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enable_kernel_altivec();
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enable_kernel_vsx();
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aes_p8_encrypt(ctrblk, keystream, &ctx->enc_key);
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pagefault_enable();
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@ -131,6 +133,7 @@ static int p8_aes_ctr_crypt(struct blkcipher_desc *desc,
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while ((nbytes = walk.nbytes) >= AES_BLOCK_SIZE) {
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pagefault_disable();
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enable_kernel_altivec();
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enable_kernel_vsx();
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aes_p8_ctr32_encrypt_blocks(walk.src.virt.addr,
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walk.dst.virt.addr,
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(nbytes &
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@ -119,6 +119,7 @@ static int p8_ghash_setkey(struct crypto_shash *tfm, const u8 *key,
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preempt_disable();
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pagefault_disable();
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enable_kernel_altivec();
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enable_kernel_vsx();
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enable_kernel_fp();
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gcm_init_p8(ctx->htable, (const u64 *) key);
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pagefault_enable();
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@ -149,6 +150,7 @@ static int p8_ghash_update(struct shash_desc *desc,
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preempt_disable();
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pagefault_disable();
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enable_kernel_altivec();
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enable_kernel_vsx();
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enable_kernel_fp();
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gcm_ghash_p8(dctx->shash, ctx->htable,
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dctx->buffer, GHASH_DIGEST_SIZE);
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@ -163,6 +165,7 @@ static int p8_ghash_update(struct shash_desc *desc,
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preempt_disable();
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pagefault_disable();
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enable_kernel_altivec();
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enable_kernel_vsx();
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enable_kernel_fp();
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gcm_ghash_p8(dctx->shash, ctx->htable, src, len);
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pagefault_enable();
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@ -193,6 +196,7 @@ static int p8_ghash_final(struct shash_desc *desc, u8 *out)
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preempt_disable();
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pagefault_disable();
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enable_kernel_altivec();
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enable_kernel_vsx();
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enable_kernel_fp();
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gcm_ghash_p8(dctx->shash, ctx->htable,
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dctx->buffer, GHASH_DIGEST_SIZE);
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