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authorDavid Hildenbrand <dahi@linux.vnet.ibm.com>2015-05-11 17:52:18 +0200
committerIngo Molnar <mingo@kernel.org>2015-05-19 08:39:17 +0200
commit5f76eea88dcbe75506d98e0207b9e3bd47941f2d (patch)
treefd90846667602705b9665aa9d8b93d5a5d49ae94 /drivers/crypto/vmx
parent2f09b227eeed4b3a072fe818c82a4c773b778cde (diff)
downloadop-kernel-dev-5f76eea88dcbe75506d98e0207b9e3bd47941f2d.zip
op-kernel-dev-5f76eea88dcbe75506d98e0207b9e3bd47941f2d.tar.gz
sched/preempt, powerpc: Disable preemption in enable_kernel_altivec() explicitly
enable_kernel_altivec() has to be called with disabled preemption. Let's make this explicit, to prepare for pagefault_disable() not touching preemption anymore. Reviewed-and-tested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: David.Laight@ACULAB.COM Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: airlied@linux.ie Cc: akpm@linux-foundation.org Cc: bigeasy@linutronix.de Cc: borntraeger@de.ibm.com Cc: daniel.vetter@intel.com Cc: heiko.carstens@de.ibm.com Cc: herbert@gondor.apana.org.au Cc: hocko@suse.cz Cc: hughd@google.com Cc: mst@redhat.com Cc: paulus@samba.org Cc: ralf@linux-mips.org Cc: schwidefsky@de.ibm.com Cc: yang.shi@windriver.com Link: http://lkml.kernel.org/r/1431359540-32227-14-git-send-email-dahi@linux.vnet.ibm.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/crypto/vmx')
-rw-r--r--drivers/crypto/vmx/aes.c8
-rw-r--r--drivers/crypto/vmx/aes_cbc.c6
-rw-r--r--drivers/crypto/vmx/ghash.c8
3 files changed, 21 insertions, 1 deletions
diff --git a/drivers/crypto/vmx/aes.c b/drivers/crypto/vmx/aes.c
index ab300ea..a9064e3 100644
--- a/drivers/crypto/vmx/aes.c
+++ b/drivers/crypto/vmx/aes.c
@@ -78,12 +78,14 @@ static int p8_aes_setkey(struct crypto_tfm *tfm, const u8 *key,
int ret;
struct p8_aes_ctx *ctx = crypto_tfm_ctx(tfm);
+ preempt_disable();
pagefault_disable();
enable_kernel_altivec();
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();
-
+ preempt_enable();
+
ret += crypto_cipher_setkey(ctx->fallback, key, keylen);
return ret;
}
@@ -95,10 +97,12 @@ static void p8_aes_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
if (in_interrupt()) {
crypto_cipher_encrypt_one(ctx->fallback, dst, src);
} else {
+ preempt_disable();
pagefault_disable();
enable_kernel_altivec();
aes_p8_encrypt(src, dst, &ctx->enc_key);
pagefault_enable();
+ preempt_enable();
}
}
@@ -109,10 +113,12 @@ static void p8_aes_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
if (in_interrupt()) {
crypto_cipher_decrypt_one(ctx->fallback, dst, src);
} else {
+ preempt_disable();
pagefault_disable();
enable_kernel_altivec();
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 1a559b7..477284a 100644
--- a/drivers/crypto/vmx/aes_cbc.c
+++ b/drivers/crypto/vmx/aes_cbc.c
@@ -79,11 +79,13 @@ static int p8_aes_cbc_setkey(struct crypto_tfm *tfm, const u8 *key,
int ret;
struct p8_aes_cbc_ctx *ctx = crypto_tfm_ctx(tfm);
+ preempt_disable();
pagefault_disable();
enable_kernel_altivec();
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();
+ preempt_enable();
ret += crypto_blkcipher_setkey(ctx->fallback, key, keylen);
return ret;
@@ -106,6 +108,7 @@ static int p8_aes_cbc_encrypt(struct blkcipher_desc *desc,
if (in_interrupt()) {
ret = crypto_blkcipher_encrypt(&fallback_desc, dst, src, nbytes);
} else {
+ preempt_disable();
pagefault_disable();
enable_kernel_altivec();
@@ -119,6 +122,7 @@ static int p8_aes_cbc_encrypt(struct blkcipher_desc *desc,
}
pagefault_enable();
+ preempt_enable();
}
return ret;
@@ -141,6 +145,7 @@ static int p8_aes_cbc_decrypt(struct blkcipher_desc *desc,
if (in_interrupt()) {
ret = crypto_blkcipher_decrypt(&fallback_desc, dst, src, nbytes);
} else {
+ preempt_disable();
pagefault_disable();
enable_kernel_altivec();
@@ -154,6 +159,7 @@ static int p8_aes_cbc_decrypt(struct blkcipher_desc *desc,
}
pagefault_enable();
+ preempt_enable();
}
return ret;
diff --git a/drivers/crypto/vmx/ghash.c b/drivers/crypto/vmx/ghash.c
index d0ffe27..f255ec4 100644
--- a/drivers/crypto/vmx/ghash.c
+++ b/drivers/crypto/vmx/ghash.c
@@ -114,11 +114,13 @@ static int p8_ghash_setkey(struct crypto_shash *tfm, const u8 *key,
if (keylen != GHASH_KEY_LEN)
return -EINVAL;
+ preempt_disable();
pagefault_disable();
enable_kernel_altivec();
enable_kernel_fp();
gcm_init_p8(ctx->htable, (const u64 *) key);
pagefault_enable();
+ preempt_enable();
return crypto_shash_setkey(ctx->fallback, key, keylen);
}
@@ -140,23 +142,27 @@ static int p8_ghash_update(struct shash_desc *desc,
}
memcpy(dctx->buffer + dctx->bytes, src,
GHASH_DIGEST_SIZE - dctx->bytes);
+ preempt_disable();
pagefault_disable();
enable_kernel_altivec();
enable_kernel_fp();
gcm_ghash_p8(dctx->shash, ctx->htable, dctx->buffer,
GHASH_DIGEST_SIZE);
pagefault_enable();
+ preempt_enable();
src += GHASH_DIGEST_SIZE - dctx->bytes;
srclen -= GHASH_DIGEST_SIZE - dctx->bytes;
dctx->bytes = 0;
}
len = srclen & ~(GHASH_DIGEST_SIZE - 1);
if (len) {
+ preempt_disable();
pagefault_disable();
enable_kernel_altivec();
enable_kernel_fp();
gcm_ghash_p8(dctx->shash, ctx->htable, src, len);
pagefault_enable();
+ preempt_enable();
src += len;
srclen -= len;
}
@@ -180,12 +186,14 @@ static int p8_ghash_final(struct shash_desc *desc, u8 *out)
if (dctx->bytes) {
for (i = dctx->bytes; i < GHASH_DIGEST_SIZE; i++)
dctx->buffer[i] = 0;
+ preempt_disable();
pagefault_disable();
enable_kernel_altivec();
enable_kernel_fp();
gcm_ghash_p8(dctx->shash, ctx->htable, dctx->buffer,
GHASH_DIGEST_SIZE);
pagefault_enable();
+ preempt_enable();
dctx->bytes = 0;
}
memcpy(out, dctx->shash, GHASH_DIGEST_SIZE);
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