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2015-12-01powerpc: Create disable_kernel_{fp,altivec,vsx,spe}()Anton Blanchard3-0/+3
The enable_kernel_*() functions leave the relevant MSR bits enabled until we exit the kernel sometime later. Create disable versions that wrap the kernel use of FP, Altivec VSX or SPE. While we don't want to disable it normally for performance reasons (MSR writes are slow), it will be used for a debug boot option that does this and catches bad uses in other areas of the kernel. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2015-05-18crypto: powerpc/md5 - use md5 IV MD5_HX instead of their raw valueLABBE Corentin1-4/+4
Since MD5 IV are now available in crypto/md5.h, use them. Signed-off-by: LABBE Corentin <clabbe.montjoie@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2015-03-09crypto: powerpc - move files to fix build errorKim Phillips6-4/+513
The current cryptodev-2.6 tree commits: d9850fc529ef ("crypto: powerpc/sha1 - kernel config") 50ba29aaa7b0 ("crypto: powerpc/sha1 - glue") failed to properly place files under arch/powerpc/crypto, which leads to build errors: make[1]: *** No rule to make target 'arch/powerpc/crypto/sha1-spe-asm.o', needed by 'arch/powerpc/crypto/sha1-ppc-spe.o'. Stop. make[1]: *** No rule to make target 'arch/powerpc/crypto/sha1_spe_glue.o', needed by 'arch/powerpc/crypto/sha1-ppc-spe.o'. Stop. Makefile:947: recipe for target 'arch/powerpc/crypto' failed Move the two sha1 spe files under crypto/, and whilst there, rename other powerpc crypto files with underscores to use dashes for consistency. Cc: Markus Stockhausen <stockhausen@collogia.de> Signed-off-by: Kim Phillips <kim.phillips@freescale.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2015-03-04crypto: powerpc/md5 - kernel configMarkus Stockhausen1-0/+2
Integrate the module into the kernel config tree. Signed-off-by: Markus Stockhausen <stockhausen@collogia.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2015-03-04crypto: powerpc/md5 - glueMarkus Stockhausen1-0/+165
Glue code for crypto infrastructure. Call the assembler code where required. Take a little care about small input data. Kick out early for input chunks < 64 bytes and replace memset for context cleanup with simple loop. Signed-off-by: Markus Stockhausen <stockhausen@collogia.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2015-03-04crypto: powerpc/md5 - assemblerMarkus Stockhausen1-0/+243
This is the assembler code for the MD5 implementation. Handling of algorithm constants has been slightly changed to reduce register usage and make better use of cores with multiple ALUs. Thus they are stored as delta values. Signed-off-by: Markus Stockhausen <stockhausen@collogia.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2015-03-02crypto: powerpc/sha1 - kernel configMarkus Stockhausen1-0/+2
Integrate the module into the kernel config tree. Signed-off-by: Markus Stockhausen <stockhausen@collogia.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2015-03-01crypto: powerpc/aes - kernel configMarkus Stockhausen1-0/+2
Integrate the module into the kernel configuration Signed-off-by: Markus Stockhausen <stockhausen@collogia.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2015-03-01cyprot: powerpc/aes - glue codeMarkus Stockhausen1-0/+512
Integrate the assembler modules into the kernel crypto framework. Take care to avoid long intervals of disabled preemption. Signed-off-by: Markus Stockhausen <stockhausen@collogia.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2015-03-01crypto: powerpc/aes - ECB/CBC/CTR/XTS modesMarkus Stockhausen1-0/+630
The assembler block cipher module that controls the core AES functions. Signed-off-by: Markus Stockhausen <stockhausen@collogia.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2015-03-01crypto: powerpc/aes - key handlingMarkus Stockhausen1-0/+283
Key generation for big endian core routines. Signed-off-by: Markus Stockhausen <stockhausen@collogia.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2015-03-01crypto: powerpc/aes - assembler coreMarkus Stockhausen1-0/+351
The assembler AES encryption and decryption core routines. Implemented & optimized for big endian. Nevertheless they work on little endian too. For most efficient reuse in (higher level) block cipher routines they are implemented as "fast" call modules without any stack handling or register saving. The caller must take care of that part. Signed-off-by: Markus Stockhausen <stockhausen@collogia.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2015-03-01crypto: powerpc/aes - aes tablesMarkus Stockhausen1-0/+331
4K AES tables for big endian. To reduce the possiblity of timing attacks, the size has been cut to 8KB + 256 bytes in contrast to 16KB in the generic implementation. That is not perfect but at least a good tradeoff for CPU limited router devices. Signed-off-by: Markus Stockhausen <stockhausen@collogia.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2015-03-01crypto: powerpc/aes - register definesMarkus Stockhausen1-0/+42
Define some register aliases for better readability. Signed-off-by: Markus Stockhausen <stockhausen@collogia.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2015-02-27crypto: ppc/sha256 - kernel configMarkus Stockhausen1-0/+2
Integrate the module into the kernel config tree. Signed-off-by: Markus Stockhausen <stockhausen@collogia.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2015-02-27crypto: ppc/sha256 - glueMarkus Stockhausen1-0/+275
Glue code for crypto infrastructure. Call the assembler code where required. Disable preemption during calculation and enable SPE instructions in the kernel prior to the call. Avoid to disable preemption for too long. Take a little care about small input data. Kick out early for input chunks < 64 bytes and replace memset for context cleanup with simple loop. Signed-off-by: Markus Stockhausen <stockhausen@collogia.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2015-02-27crypto: ppc/sha256 - assemblerMarkus Stockhausen1-0/+323
This is the assembler code for SHA256 implementation with the SIMD SPE instruction set. Although being only a 32 bit architecture GPRs are extended to 64 bit presenting two 32 bit values. With the enhanced instruction set we can operate on them in parallel. That helps reducing the time to calculate W16-W64. For increasing performance even more the assembler function can compute hashes for more than one 64 byte input block. That saves a lot of register saving/restoring The state of the used SPE registers is preserved via the stack so we can run from interrupt context. There might be the case that we interrupt ourselves and push sensitive data from another context onto our stack. Clear this area in the stack afterwards to avoid information leakage. The code is endian independant. Signed-off-by: Markus Stockhausen <stockhausen@collogia.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2015-01-13crypto: add missing crypto module aliasesMathias Krause1-0/+1
Commit 5d26a105b5a7 ("crypto: prefix module autoloading with "crypto-"") changed the automatic module loading when requesting crypto algorithms to prefix all module requests with "crypto-". This requires all crypto modules to have a crypto specific module alias even if their file name would otherwise match the requested crypto algorithm. Even though commit 5d26a105b5a7 added those aliases for a vast amount of modules, it was missing a few. Add the required MODULE_ALIAS_CRYPTO annotations to those files to make them get loaded automatically, again. This fixes, e.g., requesting 'ecb(blowfish-generic)', which used to work with kernels v3.18 and below. Also change MODULE_ALIAS() lines to MODULE_ALIAS_CRYPTO(). The former won't work for crypto modules any more. Fixes: 5d26a105b5a7 ("crypto: prefix module autoloading with "crypto-"") Cc: Kees Cook <keescook@chromium.org> Signed-off-by: Mathias Krause <minipli@googlemail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2014-12-02crypto: powerpc - replace memset by memzero_explicitJulia Lawall1-1/+1
Memset on a local variable may be removed when it is called just before the variable goes out of scope. Using memzero_explicit defeats this optimization. A simplified version of the semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ identifier x; type T; @@ { ... when any T x[...]; ... when any when exists - memset + memzero_explicit (x, -0, ...) ... when != x when strict } // </smpl> This change was suggested by Daniel Borkmann <dborkman@redhat.com> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Acked-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2014-11-24crypto: prefix module autoloading with "crypto-"Kees Cook1-1/+1
This prefixes all crypto module loading with "crypto-" so we never run the risk of exposing module auto-loading to userspace via a crypto API, as demonstrated by Mathias Krause: https://lkml.org/lkml/2013/3/4/70 Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2013-03-05powerpc: Fix compile of sha1-powerpc-asm.S on 32-bitTony Breeds1-2/+2
When building with CRYPTO_SHA1_PPC enabled we fail with: powerpc/crypto/sha1-powerpc-asm.S: Assembler messages: powerpc/crypto/sha1-powerpc-asm.S:116: Error: can't resolve `0' {*ABS* section} - `STACKFRAMESIZE' {*UND* section} powerpc/crypto/sha1-powerpc-asm.S:116: Error: expression too complex powerpc/crypto/sha1-powerpc-asm.S:178: Error: unsupported relocation against STACKFRAMESIZE Use INT_FRAME_SIZE instead of STACKFRAMESIZE. Signed-off-by: Tony Breeds <tony@bakeyournoodle.com> Tested-by: Christian Kujau <lists@nerdbynature.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-01-10powerpc: Add a powerpc implementation of SHA-1Michael Ellerman3-0/+345
This patch adds a crypto driver which provides a powerpc accelerated implementation of SHA-1, accelerated in that it is written in asm. Original patch by Paul, minor fixups for upstream by moi. Lightly tested on 64-bit with the test program here: http://michael.ellerman.id.au/files/junkcode/sha1test.c Seems to work, and is "not slower" than the generic version. Needs testing on 32-bit. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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