Commit 2d6f0600 authored by Leonidas Da Silva Barbosa's avatar Leonidas Da Silva Barbosa Committed by Herbert Xu
Browse files

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: default avatarLeonidas S. Barbosa <leosilva@linux.vnet.ibm.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 72cd7b44

drivers/crypto/vmx/aes.c

+3 −0
Original line number Diff line number Diff line
@@ -84,6 +84,7 @@ static int p8_aes_setkey(struct crypto_tfm *tfm, const u8 *key, 
	preempt_disable();

	pagefault_disable();

	enable_kernel_altivec();

	enable_kernel_vsx();

	ret = aes_p8_set_encrypt_key(key, keylen * 8, &ctx->enc_key);

	ret += aes_p8_set_decrypt_key(key, keylen * 8, &ctx->dec_key);

	pagefault_enable();
@@ -103,6 +104,7 @@ static void p8_aes_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) 
		preempt_disable();

		pagefault_disable();

		enable_kernel_altivec();

		enable_kernel_vsx();

		aes_p8_encrypt(src, dst, &ctx->enc_key);

		pagefault_enable();

		preempt_enable();
@@ -119,6 +121,7 @@ static void p8_aes_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) 
		preempt_disable();

		pagefault_disable();

		enable_kernel_altivec();

		enable_kernel_vsx();

		aes_p8_decrypt(src, dst, &ctx->dec_key);

		pagefault_enable();

		preempt_enable();

drivers/crypto/vmx/aes_cbc.c

+3 −0
Original line number Diff line number Diff line
@@ -85,6 +85,7 @@ static int p8_aes_cbc_setkey(struct crypto_tfm *tfm, const u8 *key, 
	preempt_disable();

	pagefault_disable();

	enable_kernel_altivec();

	enable_kernel_vsx();

	ret = aes_p8_set_encrypt_key(key, keylen * 8, &ctx->enc_key);

	ret += aes_p8_set_decrypt_key(key, keylen * 8, &ctx->dec_key);

	pagefault_enable();
@@ -115,6 +116,7 @@ static int p8_aes_cbc_encrypt(struct blkcipher_desc *desc, 
		preempt_disable();

		pagefault_disable();

		enable_kernel_altivec();

		enable_kernel_vsx();



		blkcipher_walk_init(&walk, dst, src, nbytes);

		ret = blkcipher_walk_virt(desc, &walk);
@@ -155,6 +157,7 @@ static int p8_aes_cbc_decrypt(struct blkcipher_desc *desc, 
		preempt_disable();

		pagefault_disable();

		enable_kernel_altivec();

		enable_kernel_vsx();



		blkcipher_walk_init(&walk, dst, src, nbytes);

		ret = blkcipher_walk_virt(desc, &walk);

drivers/crypto/vmx/aes_ctr.c

+3 −0
Original line number Diff line number Diff line
@@ -82,6 +82,7 @@ static int p8_aes_ctr_setkey(struct crypto_tfm *tfm, const u8 *key, 


	pagefault_disable();

	enable_kernel_altivec();

	enable_kernel_vsx();

	ret = aes_p8_set_encrypt_key(key, keylen * 8, &ctx->enc_key);

	pagefault_enable();
@@ -100,6 +101,7 @@ static void p8_aes_ctr_final(struct p8_aes_ctr_ctx *ctx, 


	pagefault_disable();

	enable_kernel_altivec();

	enable_kernel_vsx();

	aes_p8_encrypt(ctrblk, keystream, &ctx->enc_key);

	pagefault_enable();
@@ -131,6 +133,7 @@ static int p8_aes_ctr_crypt(struct blkcipher_desc *desc, 
		while ((nbytes = walk.nbytes) >= AES_BLOCK_SIZE) {

			pagefault_disable();

			enable_kernel_altivec();

			enable_kernel_vsx();

			aes_p8_ctr32_encrypt_blocks(walk.src.virt.addr,

						    walk.dst.virt.addr,

						    (nbytes &

drivers/crypto/vmx/ghash.c

+4 −0
Original line number Diff line number Diff line
@@ -119,6 +119,7 @@ static int p8_ghash_setkey(struct crypto_shash *tfm, const u8 *key, 
	preempt_disable();

	pagefault_disable();

	enable_kernel_altivec();

	enable_kernel_vsx();

	enable_kernel_fp();

	gcm_init_p8(ctx->htable, (const u64 *) key);

	pagefault_enable();
@@ -149,6 +150,7 @@ static int p8_ghash_update(struct shash_desc *desc, 
			preempt_disable();

			pagefault_disable();

			enable_kernel_altivec();

			enable_kernel_vsx();

			enable_kernel_fp();

			gcm_ghash_p8(dctx->shash, ctx->htable,

				     dctx->buffer, GHASH_DIGEST_SIZE);
@@ -163,6 +165,7 @@ static int p8_ghash_update(struct shash_desc *desc, 
			preempt_disable();

			pagefault_disable();

			enable_kernel_altivec();

			enable_kernel_vsx();

			enable_kernel_fp();

			gcm_ghash_p8(dctx->shash, ctx->htable, src, len);

			pagefault_enable();
@@ -193,6 +196,7 @@ static int p8_ghash_final(struct shash_desc *desc, u8 *out) 
			preempt_disable();

			pagefault_disable();

			enable_kernel_altivec();

			enable_kernel_vsx();

			enable_kernel_fp();

			gcm_ghash_p8(dctx->shash, ctx->htable,

				     dctx->buffer, GHASH_DIGEST_SIZE);

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