linux.git/drivers/crypto/vmx/aes_ctr.c, branch v4.4.69

crypto: vmx - IV size failing on skcipher API

2016-09-15T06:27:48+00:00

[ Upstream commit 0d3d054b43719ef33232677ba27ba6097afdafbc ]

IV size was zero on CBC and CTR modes,
causing a bug triggered by skcipher.

Fixing this  adding a correct size.

Signed-off-by: Leonidas Da Silva Barbosa 
Signed-off-by: Paulo Smorigo 
Signed-off-by: Herbert Xu 
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman

crypto: vmx - Increase priority of aes-cbc cipher

2016-07-11T16:31:12+00:00

commit 12d3f49e1ffbbf8cbbb60acae5a21103c5c841ac upstream.

All of the VMX AES ciphers (AES, AES-CBC and AES-CTR) are set at
priority 1000. Unfortunately this means we never use AES-CBC and
AES-CTR, because the base AES-CBC cipher that is implemented on
top of AES inherits its priority.

To fix this, AES-CBC and AES-CTR have to be a higher priority. Set
them to 2000.

Testing on a POWER8 with:

cryptsetup benchmark --cipher aes --key-size 256

Shows decryption speed increase from 402.4 MB/s to 3069.2 MB/s,
over 7x faster. Thanks to Mike Strosaker for helping me debug
this issue.

Fixes: 8c755ace357c ("crypto: vmx - Adding CBC routines for VMX module")
Signed-off-by: Anton Blanchard 
Signed-off-by: Herbert Xu 
Signed-off-by: Greg Kroah-Hartman

crypto: vmx - Fixing AES-CTR counter bug

2015-08-18T02:30:35+00:00

AES-CTR is using a counter 8bytes-8bytes what miss match with
kernel specs.

In the previous code a vadduwm was done to increment counter.
Replacing this for a vadduqm now considering both cases counter
8-8 bytes and full 16bytes.

Cc: stable@vger.kernel.org
Signed-off-by: Leonidas S Barbosa 
Signed-off-by: Herbert Xu

crypto: vmx - Adding enable_kernel_vsx() to access VSX instructions

2015-07-14T06:56:48+00:00

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 
Signed-off-by: Herbert Xu

crypto: vmx - Reindent to kernel style

2015-06-16T06:35:02+00:00

This patch reidents the vmx code-base to the kernel coding style.

Signed-off-by: Herbert Xu

crypto: vmx - Adding CTR routines for VMX module

2015-02-28T10:13:45+00:00

This patch adds AES CTR routines to VMX module in order to
make use of VMX cryptographic acceleration instructions
on Power 8 CPU.

Signed-off-by: Leonidas S. Barbosa 
Signed-off-by: Herbert Xu