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Date: Sat, 26 Sep 2015 13:54:46 -0700
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org,
"Leonidas S. Barbosa" <leosilva@...ux.vnet.ibm.com>,
Herbert Xu <herbert@...dor.apana.org.au>,
Michael Ellerman <mpe@...erman.id.au>
Subject: [PATCH 4.1 040/159] crypto: vmx - Adding enable_kernel_vsx() to access VSX instructions
4.1-stable review patch. If anyone has any objections, please let me know.
------------------
From: Leonidas Da Silva Barbosa <leosilva@...ux.vnet.ibm.com>
commit 2d6f0600b2cd755959527230ef5a6fba97bb762a upstream.
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@...ux.vnet.ibm.com>
Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>
Signed-off-by: Michael Ellerman <mpe@...erman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/crypto/vmx/aes.c | 3 +++
drivers/crypto/vmx/aes_cbc.c | 3 +++
drivers/crypto/vmx/aes_ctr.c | 3 +++
drivers/crypto/vmx/ghash.c | 4 ++++
4 files changed, 13 insertions(+)
--- a/drivers/crypto/vmx/aes.c
+++ b/drivers/crypto/vmx/aes.c
@@ -80,6 +80,7 @@ static int p8_aes_setkey(struct crypto_t
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();
@@ -97,6 +98,7 @@ static void p8_aes_encrypt(struct crypto
} else {
pagefault_disable();
enable_kernel_altivec();
+ enable_kernel_vsx();
aes_p8_encrypt(src, dst, &ctx->enc_key);
pagefault_enable();
}
@@ -111,6 +113,7 @@ static void p8_aes_decrypt(struct crypto
} else {
pagefault_disable();
enable_kernel_altivec();
+ enable_kernel_vsx();
aes_p8_decrypt(src, dst, &ctx->dec_key);
pagefault_enable();
}
--- a/drivers/crypto/vmx/aes_cbc.c
+++ b/drivers/crypto/vmx/aes_cbc.c
@@ -81,6 +81,7 @@ static int p8_aes_cbc_setkey(struct cryp
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();
@@ -108,6 +109,7 @@ static int p8_aes_cbc_encrypt(struct blk
} else {
pagefault_disable();
enable_kernel_altivec();
+ enable_kernel_vsx();
blkcipher_walk_init(&walk, dst, src, nbytes);
ret = blkcipher_walk_virt(desc, &walk);
@@ -143,6 +145,7 @@ static int p8_aes_cbc_decrypt(struct blk
} else {
pagefault_disable();
enable_kernel_altivec();
+ enable_kernel_vsx();
blkcipher_walk_init(&walk, dst, src, nbytes);
ret = blkcipher_walk_virt(desc, &walk);
--- a/drivers/crypto/vmx/aes_ctr.c
+++ b/drivers/crypto/vmx/aes_ctr.c
@@ -79,6 +79,7 @@ static int p8_aes_ctr_setkey(struct cryp
pagefault_disable();
enable_kernel_altivec();
+ enable_kernel_vsx();
ret = aes_p8_set_encrypt_key(key, keylen * 8, &ctx->enc_key);
pagefault_enable();
@@ -97,6 +98,7 @@ static void p8_aes_ctr_final(struct p8_a
pagefault_disable();
enable_kernel_altivec();
+ enable_kernel_vsx();
aes_p8_encrypt(ctrblk, keystream, &ctx->enc_key);
pagefault_enable();
@@ -127,6 +129,7 @@ static int p8_aes_ctr_crypt(struct blkci
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 & AES_BLOCK_MASK)/AES_BLOCK_SIZE, &ctx->enc_key, walk.iv);
pagefault_enable();
--- a/drivers/crypto/vmx/ghash.c
+++ b/drivers/crypto/vmx/ghash.c
@@ -116,6 +116,7 @@ static int p8_ghash_setkey(struct crypto
pagefault_disable();
enable_kernel_altivec();
+ enable_kernel_vsx();
enable_kernel_fp();
gcm_init_p8(ctx->htable, (const u64 *) key);
pagefault_enable();
@@ -142,6 +143,7 @@ static int p8_ghash_update(struct shash_
GHASH_DIGEST_SIZE - dctx->bytes);
pagefault_disable();
enable_kernel_altivec();
+ enable_kernel_vsx();
enable_kernel_fp();
gcm_ghash_p8(dctx->shash, ctx->htable, dctx->buffer,
GHASH_DIGEST_SIZE);
@@ -154,6 +156,7 @@ static int p8_ghash_update(struct shash_
if (len) {
pagefault_disable();
enable_kernel_altivec();
+ enable_kernel_vsx();
enable_kernel_fp();
gcm_ghash_p8(dctx->shash, ctx->htable, src, len);
pagefault_enable();
@@ -182,6 +185,7 @@ static int p8_ghash_final(struct shash_d
dctx->buffer[i] = 0;
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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