xiaomi-sm8450/android_kernel_xiaomi_sm8450
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crypto: vmx - Adding enable_kernel_vsx() to access VSX instructions

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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>
This commit is contained in:
Leonidas Da Silva Barbosa
2015-07-13 13:51:39 -03:00
committed by Herbert Xu
parent 72cd7b44bc
commit 2d6f0600b2
4 changed files with 13 additions and 0 deletions
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3
drivers/crypto/vmx/aes_ctr.c
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@@ -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 &