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authorLeonidas Da Silva Barbosa <leosilva@linux.vnet.ibm.com>2015-07-13 13:51:39 -0300
committerHerbert Xu <herbert@gondor.apana.org.au>2015-07-14 14:56:48 +0800
commit2d6f0600b2cd755959527230ef5a6fba97bb762a (patch)
treedaecab27712eeca306e75969d9d0ef988feda758 /drivers/crypto/vmx
parent72cd7b44bc99376b3f3c93cedcd052663fcdf705 (diff)
downloadlinux-2d6f0600b2cd755959527230ef5a6fba97bb762a.tar.gz
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>
Diffstat (limited to 'drivers/crypto/vmx')
-rw-r--r--drivers/crypto/vmx/aes.c3
-rw-r--r--drivers/crypto/vmx/aes_cbc.c3
-rw-r--r--drivers/crypto/vmx/aes_ctr.c3
-rw-r--r--drivers/crypto/vmx/ghash.c4
4 files changed, 13 insertions, 0 deletions
diff --git a/drivers/crypto/vmx/aes.c b/drivers/crypto/vmx/aes.c
index e79e567e43aa..263af709e536 100644
--- a/drivers/crypto/vmx/aes.c
+++ b/drivers/crypto/vmx/aes.c
@@ -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();
diff --git a/drivers/crypto/vmx/aes_cbc.c b/drivers/crypto/vmx/aes_cbc.c
index 7299995c78ec..0b8fe2ec5315 100644
--- a/drivers/crypto/vmx/aes_cbc.c
+++ b/drivers/crypto/vmx/aes_cbc.c
@@ -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);
diff --git a/drivers/crypto/vmx/aes_ctr.c b/drivers/crypto/vmx/aes_ctr.c
index 7adae42a7b79..1e754ae4e850 100644
--- a/drivers/crypto/vmx/aes_ctr.c
+++ b/drivers/crypto/vmx/aes_ctr.c
@@ -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 &
diff --git a/drivers/crypto/vmx/ghash.c b/drivers/crypto/vmx/ghash.c
index b5e29002b666..2183a2e77641 100644
--- a/drivers/crypto/vmx/ghash.c
+++ b/drivers/crypto/vmx/ghash.c
@@ -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);