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| author | Huang Ying <ying.huang@intel.com> | 2009-06-18 19:41:27 +0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2009-06-18 19:41:27 +0800 |
| commit | 9251b64fb2d2326d28f0e0646a9e4fb8bbb51d8e (patch) | |
| tree | 2ef7e20387ee2646679c587abef236100684a7d6 /arch | |
| parent | e6efaa025384f86a18814a6b9f4e5d54484ab9ff (diff) | |
| download | linux-9251b64fb2d2326d28f0e0646a9e4fb8bbb51d8e.tar.gz linux-9251b64fb2d2326d28f0e0646a9e4fb8bbb51d8e.tar.bz2 linux-9251b64fb2d2326d28f0e0646a9e4fb8bbb51d8e.zip | |
crypto: aes-ni - Do not sleep when using the FPU
Because AES-NI instructions will touch XMM state, corresponding code
must be enclosed within kernel_fpu_begin/end, which used
preempt_disable/enable. So sleep should be prevented between
kernel_fpu_begin/end.
Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/crypto/aesni-intel_glue.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/crypto/aesni-intel_glue.c b/arch/x86/crypto/aesni-intel_glue.c index 4e663398f77f..c580c5ec1cad 100644 --- a/arch/x86/crypto/aesni-intel_glue.c +++ b/arch/x86/crypto/aesni-intel_glue.c @@ -198,6 +198,7 @@ static int ecb_encrypt(struct blkcipher_desc *desc, blkcipher_walk_init(&walk, dst, src, nbytes); err = blkcipher_walk_virt(desc, &walk); + desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; kernel_fpu_begin(); while ((nbytes = walk.nbytes)) { @@ -221,6 +222,7 @@ static int ecb_decrypt(struct blkcipher_desc *desc, blkcipher_walk_init(&walk, dst, src, nbytes); err = blkcipher_walk_virt(desc, &walk); + desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; kernel_fpu_begin(); while ((nbytes = walk.nbytes)) { @@ -266,6 +268,7 @@ static int cbc_encrypt(struct blkcipher_desc *desc, blkcipher_walk_init(&walk, dst, src, nbytes); err = blkcipher_walk_virt(desc, &walk); + desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; kernel_fpu_begin(); while ((nbytes = walk.nbytes)) { @@ -289,6 +292,7 @@ static int cbc_decrypt(struct blkcipher_desc *desc, blkcipher_walk_init(&walk, dst, src, nbytes); err = blkcipher_walk_virt(desc, &walk); + desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; kernel_fpu_begin(); while ((nbytes = walk.nbytes)) { |