platform/kernel/linux-exynos.git
6 years agocrypto: arm64/aes - avoid expanded lookup tables in the final round
Ard Biesheuvel [Mon, 24 Jul 2017 10:28:20 +0000 (11:28 +0100)]
crypto: arm64/aes - avoid expanded lookup tables in the final round

For the final round, avoid the expanded and padded lookup tables
exported by the generic AES driver. Instead, for encryption, we can
perform byte loads from the same table we used for the inner rounds,
which will still be hot in the caches. For decryption, use the inverse
AES Sbox directly, which is 4x smaller than the inverse lookup table
exported by the generic driver.

This should significantly reduce the Dcache footprint of our code,
which makes the code more robust against timing attacks. It does not
introduce any additional module dependencies, given that we already
rely on the core AES module for the shared key expansion routines.
It also frees up register x18, which is not available as a scratch
register on all platforms, which and so avoiding it improves
shareability of this code.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: arm/aes - avoid expanded lookup tables in the final round
Ard Biesheuvel [Mon, 24 Jul 2017 10:28:19 +0000 (11:28 +0100)]
crypto: arm/aes - avoid expanded lookup tables in the final round

For the final round, avoid the expanded and padded lookup tables
exported by the generic AES driver. Instead, for encryption, we can
perform byte loads from the same table we used for the inner rounds,
which will still be hot in the caches. For decryption, use the inverse
AES Sbox directly, which is 4x smaller than the inverse lookup table
exported by the generic driver.

This should significantly reduce the Dcache footprint of our code,
which makes the code more robust against timing attacks. It does not
introduce any additional module dependencies, given that we already
rely on the core AES module for the shared key expansion routines.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: arm64/ghash - add NEON accelerated fallback for 64-bit PMULL
Ard Biesheuvel [Mon, 24 Jul 2017 10:28:18 +0000 (11:28 +0100)]
crypto: arm64/ghash - add NEON accelerated fallback for 64-bit PMULL

Implement a NEON fallback for systems that do support NEON but have
no support for the optional 64x64->128 polynomial multiplication
instruction that is part of the ARMv8 Crypto Extensions. It is based
on the paper "Fast Software Polynomial Multiplication on ARM Processors
Using the NEON Engine" by Danilo Camara, Conrado Gouvea, Julio Lopez and
Ricardo Dahab (https://hal.inria.fr/hal-01506572), but has been reworked
extensively for the AArch64 ISA.

On a low-end core such as the Cortex-A53 found in the Raspberry Pi3, the
NEON based implementation is 4x faster than the table based one, and
is time invariant as well, making it less vulnerable to timing attacks.
When combined with the bit-sliced NEON implementation of AES-CTR, the
AES-GCM performance increases by 2x (from 58 to 29 cycles per byte).

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: arm/ghash - add NEON accelerated fallback for vmull.p64
Ard Biesheuvel [Mon, 24 Jul 2017 10:28:17 +0000 (11:28 +0100)]
crypto: arm/ghash - add NEON accelerated fallback for vmull.p64

Implement a NEON fallback for systems that do support NEON but have
no support for the optional 64x64->128 polynomial multiplication
instruction that is part of the ARMv8 Crypto Extensions. It is based
on the paper "Fast Software Polynomial Multiplication on ARM Processors
Using the NEON Engine" by Danilo Camara, Conrado Gouvea, Julio Lopez and
Ricardo Dahab (https://hal.inria.fr/hal-01506572)

On a 32-bit guest executing under KVM on a Cortex-A57, the new code is
not only 4x faster than the generic table based GHASH driver, it is also
time invariant. (Note that the existing vmull.p64 code is 16x faster on
this core).

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: arm64/gcm - implement native driver using v8 Crypto Extensions
Ard Biesheuvel [Mon, 24 Jul 2017 10:28:16 +0000 (11:28 +0100)]
crypto: arm64/gcm - implement native driver using v8 Crypto Extensions

Currently, the AES-GCM implementation for arm64 systems that support the
ARMv8 Crypto Extensions is based on the generic GCM module, which combines
the AES-CTR implementation using AES instructions with the PMULL based
GHASH driver. This is suboptimal, given the fact that the input data needs
to be loaded twice, once for the encryption and again for the MAC
calculation.

On Cortex-A57 (r1p2) and other recent cores that implement micro-op fusing
for the AES instructions, AES executes at less than 1 cycle per byte, which
means that any cycles wasted on loading the data twice hurt even more.

So implement a new GCM driver that combines the AES and PMULL instructions
at the block level. This improves performance on Cortex-A57 by ~37% (from
3.5 cpb to 2.6 cpb)

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: arm64/aes-bs - implement non-SIMD fallback for AES-CTR
Ard Biesheuvel [Mon, 24 Jul 2017 10:28:15 +0000 (11:28 +0100)]
crypto: arm64/aes-bs - implement non-SIMD fallback for AES-CTR

Of the various chaining modes implemented by the bit sliced AES driver,
only CTR is exposed as a synchronous cipher, and requires a fallback in
order to remain usable once we update the kernel mode NEON handling logic
to disallow nested use. So wire up the existing CTR fallback C code.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: arm64/chacha20 - take may_use_simd() into account
Ard Biesheuvel [Mon, 24 Jul 2017 10:28:14 +0000 (11:28 +0100)]
crypto: arm64/chacha20 - take may_use_simd() into account

To accommodate systems that disallow the use of kernel mode NEON in
some circumstances, take the return value of may_use_simd into
account when deciding whether to invoke the C fallback routine.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: arm64/aes-blk - add a non-SIMD fallback for synchronous CTR
Ard Biesheuvel [Mon, 24 Jul 2017 10:28:13 +0000 (11:28 +0100)]
crypto: arm64/aes-blk - add a non-SIMD fallback for synchronous CTR

To accommodate systems that may disallow use of the NEON in kernel mode
in some circumstances, introduce a C fallback for synchronous AES in CTR
mode, and use it if may_use_simd() returns false.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: arm64/aes-ce-ccm: add non-SIMD generic fallback
Ard Biesheuvel [Mon, 24 Jul 2017 10:28:12 +0000 (11:28 +0100)]
crypto: arm64/aes-ce-ccm: add non-SIMD generic fallback

The arm64 kernel will shortly disallow nested kernel mode NEON.

So honour this in the ARMv8 Crypto Extensions implementation of
CCM-AES, and fall back to a scalar implementation using the generic
crypto helpers for AES, XOR and incrementing the CTR counter.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: arm64/aes-ce-cipher: add non-SIMD generic fallback
Ard Biesheuvel [Mon, 24 Jul 2017 10:28:11 +0000 (11:28 +0100)]
crypto: arm64/aes-ce-cipher: add non-SIMD generic fallback

The arm64 kernel will shortly disallow nested kernel mode NEON, so
add a fallback to scalar code that can be invoked in that case.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: arm64/aes-ce-cipher - match round key endianness with generic code
Ard Biesheuvel [Mon, 24 Jul 2017 10:28:10 +0000 (11:28 +0100)]
crypto: arm64/aes-ce-cipher - match round key endianness with generic code

In order to be able to reuse the generic AES code as a fallback for
situations where the NEON may not be used, update the key handling
to match the byte order of the generic code: it stores round keys
as sequences of 32-bit quantities rather than streams of bytes, and
so our code needs to be updated to reflect that.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: arm64/sha2-ce - add non-SIMD scalar fallback
Ard Biesheuvel [Mon, 24 Jul 2017 10:28:09 +0000 (11:28 +0100)]
crypto: arm64/sha2-ce - add non-SIMD scalar fallback

The arm64 kernel will shortly disallow nested kernel mode NEON, so
add a fallback to scalar code that can be invoked in that case.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: arm64/sha1-ce - add non-SIMD generic fallback
Ard Biesheuvel [Mon, 24 Jul 2017 10:28:08 +0000 (11:28 +0100)]
crypto: arm64/sha1-ce - add non-SIMD generic fallback

The arm64 kernel will shortly disallow nested kernel mode NEON, so
add a fallback to scalar C code that can be invoked in that case.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: arm64/crc32 - add non-SIMD scalar fallback
Ard Biesheuvel [Mon, 24 Jul 2017 10:28:07 +0000 (11:28 +0100)]
crypto: arm64/crc32 - add non-SIMD scalar fallback

The arm64 kernel will shortly disallow nested kernel mode NEON, so
add a fallback to scalar C code that can be invoked in that case.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: arm64/crct10dif - add non-SIMD generic fallback
Ard Biesheuvel [Mon, 24 Jul 2017 10:28:06 +0000 (11:28 +0100)]
crypto: arm64/crct10dif - add non-SIMD generic fallback

The arm64 kernel will shortly disallow nested kernel mode NEON, so
add a fallback to scalar C code that can be invoked in that case.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: arm64/ghash-ce - add non-SIMD scalar fallback
Ard Biesheuvel [Mon, 24 Jul 2017 10:28:05 +0000 (11:28 +0100)]
crypto: arm64/ghash-ce - add non-SIMD scalar fallback

The arm64 kernel will shortly disallow nested kernel mode NEON, so
add a fallback to scalar C code that can be invoked in that case.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: algapi - make crypto_xor() take separate dst and src arguments
Ard Biesheuvel [Mon, 24 Jul 2017 10:28:04 +0000 (11:28 +0100)]
crypto: algapi - make crypto_xor() take separate dst and src arguments

There are quite a number of occurrences in the kernel of the pattern

  if (dst != src)
          memcpy(dst, src, walk.total % AES_BLOCK_SIZE);
  crypto_xor(dst, final, walk.total % AES_BLOCK_SIZE);

or

  crypto_xor(keystream, src, nbytes);
  memcpy(dst, keystream, nbytes);

where crypto_xor() is preceded or followed by a memcpy() invocation
that is only there because crypto_xor() uses its output parameter as
one of the inputs. To avoid having to add new instances of this pattern
in the arm64 code, which will be refactored to implement non-SIMD
fallbacks, add an alternative implementation called crypto_xor_cpy(),
taking separate input and output arguments. This removes the need for
the separate memcpy().

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: algapi - use separate dst and src operands for __crypto_xor()
Ard Biesheuvel [Mon, 24 Jul 2017 10:28:03 +0000 (11:28 +0100)]
crypto: algapi - use separate dst and src operands for __crypto_xor()

In preparation of introducing crypto_xor_cpy(), which will use separate
operands for input and output, modify the __crypto_xor() implementation,
which it will share with the existing crypto_xor(), which provides the
actual functionality when not using the inline version.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: rockchip - return the err code when unable dequeue the crypto request
Zain Wang [Mon, 24 Jul 2017 01:23:14 +0000 (09:23 +0800)]
crypto: rockchip - return the err code when unable dequeue the crypto request

Sometime we would unable to dequeue the crypto request, in this case,
we should finish crypto and return the err code.

Signed-off-by: zain wang <wzz@rock-chips.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: rockchip - move the crypto completion from interrupt context
Zain Wang [Mon, 24 Jul 2017 01:23:13 +0000 (09:23 +0800)]
crypto: rockchip - move the crypto completion from interrupt context

It's illegal to call the completion function from hardirq context,
it will cause runtime tests to fail. Let's build a new task (done_task)
for moving update operation from hardirq context.

Signed-off-by: zain wang <wzz@rock-chips.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agohwrng: mx-rngc - add a driver for Freescale RNGC
Martin Kaiser [Sun, 23 Jul 2017 17:49:06 +0000 (19:49 +0200)]
hwrng: mx-rngc - add a driver for Freescale RNGC

The driver is ported from Freescale's Linux git and can be
found in the

vendor/freescale/imx_2.6.35_maintain

branch.

The driver supports both RNG version C that's part of some Freescale
i.MX3 SoCs and version B that is available on i.MX2x chipsets.

Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Reviewed-by: PrasannaKumar Muralidharan <prasannatsmkumar@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agoDocumentation: devicetree: add Freescale RNGC binding
Steffen Trumtrar [Sun, 23 Jul 2017 17:49:04 +0000 (19:49 +0200)]
Documentation: devicetree: add Freescale RNGC binding

Add binding documentation for the Freescale RNGC found on
some i.MX2/3 SoCs.

Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agohwrng: Kconfig - Correct help text about feeding entropy pool
PrasannaKumar Muralidharan [Fri, 21 Jul 2017 17:25:56 +0000 (22:55 +0530)]
hwrng: Kconfig - Correct help text about feeding entropy pool

Modify Kconfig help text to reflect the fact that random data from hwrng
is fed into kernel random number generator's entropy pool.

Signed-off-by: PrasannaKumar Muralidharan <prasannatsmkumar@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: scompress - defer allocation of scratch buffer to first use
Ard Biesheuvel [Fri, 21 Jul 2017 15:42:38 +0000 (16:42 +0100)]
crypto: scompress - defer allocation of scratch buffer to first use

The scompress code allocates 2 x 128 KB of scratch buffers for each CPU,
so that clients of the async API can use synchronous implementations
even from atomic context. However, on systems such as Cavium Thunderx
(which has 96 cores), this adds up to a non-negligible 24 MB. Also,
32-bit systems may prefer to use their precious vmalloc space for other
things,especially since there don't appear to be any clients for the
async compression API yet.

So let's defer allocation of the scratch buffers until the first time
we allocate an acompress cipher based on an scompress implementation.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: scompress - free partially allocated scratch buffers on failure
Ard Biesheuvel [Fri, 21 Jul 2017 15:42:37 +0000 (16:42 +0100)]
crypto: scompress - free partially allocated scratch buffers on failure

When allocating the per-CPU scratch buffers, we allocate the source
and destination buffers separately, but bail immediately if the second
allocation fails, without freeing the first one. Fix that.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: scompress - don't sleep with preemption disabled
Ard Biesheuvel [Fri, 21 Jul 2017 15:42:36 +0000 (16:42 +0100)]
crypto: scompress - don't sleep with preemption disabled

Due to the use of per-CPU buffers, scomp_acomp_comp_decomp() executes
with preemption disabled, and so whether the CRYPTO_TFM_REQ_MAY_SLEEP
flag is set is irrelevant, since we cannot sleep anyway. So disregard
the flag, and use GFP_ATOMIC unconditionally.

Cc: <stable@vger.kernel.org> # v4.10+
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: brcm - Support more FlexRM rings than SPU engines.
raveendra padasalagi [Fri, 21 Jul 2017 05:47:39 +0000 (11:17 +0530)]
crypto: brcm - Support more FlexRM rings than SPU engines.

Enhance code to generically support cases where DMA rings
are greater than or equal to number of SPU engines.
New hardware has underlying DMA engine-FlexRM with 32 rings
which can be used to communicate to any of the available
10 SPU engines.

Signed-off-by: Raveendra Padasalagi <raveendra.padasalagi@broadcom.com>
Reviewed-by: Scott Branden <scott.branden@broadcom.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: atmel-ecc - fix signed integer to u8 assignment
Tudor-Dan Ambarus [Thu, 20 Jul 2017 13:35:49 +0000 (16:35 +0300)]
crypto: atmel-ecc - fix signed integer to u8 assignment

static checker warning:
        drivers/crypto/atmel-ecc.c:281 atmel_ecdh_done()
        warn: assigning (-22) to unsigned variable 'status'

Similar warning can be raised in atmel_ecc_work_handler()
when atmel_ecc_send_receive() returns an error. Fix this too.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: ecdh - fix concurrency on shared secret and pubkey
Tudor-Dan Ambarus [Thu, 20 Jul 2017 07:37:39 +0000 (10:37 +0300)]
crypto: ecdh - fix concurrency on shared secret and pubkey

ecdh_ctx contained static allocated data for the shared secret
and public key.

The shared secret and the public key were doomed to concurrency
issues because they could be shared by multiple crypto requests.

The concurrency is fixed by replacing per-tfm shared secret and
public key with per-request dynamically allocated shared secret
and public key.

Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: ccp - remove duplicate module version and author entry
Brijesh Singh [Thu, 20 Jul 2017 03:29:08 +0000 (22:29 -0500)]
crypto: ccp - remove duplicate module version and author entry

commit 720419f01832 ("crypto: ccp - Introduce the AMD Secure Processor device")
moved the module registeration from ccp-dev.c to sp-dev.c but patch missed
removing the module version and author entry from ccp-dev.c.

It causes the below warning during boot when CONFIG_CRYPTO_DEV_SP_CCP=y
and CONFIG_CRYPTO_DEV_CCP_CRYPTO=y is set.

[ 0.187825] sysfs: cannot create duplicate filename '/module/ccp/version'
[ 0.187825] sysfs: cannot create duplicate filename '/module/ccp/version'

Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Gary R Hook <gary.hook@amd.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: tcrypt - remove AES-XTS-192 speed tests
Horia Geantă [Wed, 19 Jul 2017 16:40:32 +0000 (19:40 +0300)]
crypto: tcrypt - remove AES-XTS-192 speed tests

Remove xts(aes) speed tests with 2 x 192-bit keys, since implementations
adhering strictly to IEEE 1619-2007 standard cannot cope with key sizes
other than 2 x 128, 2 x 256 bits - i.e. AES-XTS-{128,256}:
[...]
tcrypt: test 5 (384 bit key, 16 byte blocks):
caam_jr 8020000.jr: key size mismatch
tcrypt: setkey() failed flags=200000
[...]

Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agoCrypto: atmel-ecc: Make a couple of local functions static
Colin Ian King [Wed, 19 Jul 2017 09:24:15 +0000 (10:24 +0100)]
Crypto: atmel-ecc: Make a couple of local functions static

Functions atmel_ecc_i2c_client_alloc and atmel_ecc_i2c_client_free are
local to the source and no not need to be in the global scope. Make
them static.

Cleans up sparse warnings:
symbol 'atmel_ecc_i2c_client_alloc' was not declared. Should it be static?
symbol 'atmel_ecc_i2c_client_free' was not declared. Should it be static?

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: img-hash - remove unnecessary static in img_hash_remove()
Gustavo A. R. Silva [Tue, 18 Jul 2017 23:07:12 +0000 (18:07 -0500)]
crypto: img-hash - remove unnecessary static in img_hash_remove()

Remove unnecessary static on local variable hdev. Such variable
is initialized before being used, on every execution path throughout
the function. The static has no benefit and, removing it reduces the
object file size.

This issue was detected using Coccinelle and the following semantic patch:
https://github.com/GustavoARSilva/coccinelle/blob/master/static/static_unused.cocci

In the following log you can see a significant difference in the object
file size. This log is the output of the size command, before and after
the code change:

before:
   text    data     bss     dec     hex filename
  14842    6464     128   21434    53ba drivers/crypto/img-hash.o

after:
   text    data     bss     dec     hex filename
  14789    6376      64   21229    52ed drivers/crypto/img-hash.o

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: atmel-tdes - remove unnecessary static in atmel_tdes_remove()
Gustavo A. R. Silva [Tue, 18 Jul 2017 23:05:50 +0000 (18:05 -0500)]
crypto: atmel-tdes - remove unnecessary static in atmel_tdes_remove()

Remove unnecessary static on local variable tdes_dd. Such variable
is initialized before being used, on every execution path throughout
the function. The static has no benefit and, removing it reduces the
object file size.

This issue was detected using Coccinelle and the following semantic patch:
https://github.com/GustavoARSilva/coccinelle/blob/master/static/static_unused.cocci

In the following log you can see a significant difference in the object
file size. This log is the output of the size command, before and after
the code change:

before:
   text    data     bss     dec     hex filename
  17079    8704     128   25911    6537 drivers/crypto/atmel-tdes.o

after:
   text    data     bss     dec     hex filename
  17039    8616      64   25719    6477 drivers/crypto/atmel-tdes.o

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: atmel-sha - remove unnecessary static in atmel_sha_remove()
Gustavo A. R. Silva [Tue, 18 Jul 2017 23:04:45 +0000 (18:04 -0500)]
crypto: atmel-sha - remove unnecessary static in atmel_sha_remove()

Remove unnecessary static on local variable sha_dd. Such variable
is initialized before being used, on every execution path throughout
the function. The static has no benefit and, removing it reduces the
object file size.

This issue was detected using Coccinelle and the following semantic patch:
https://github.com/GustavoARSilva/coccinelle/blob/master/static/static_unused.cocci

In the following log you can see a significant difference in the object
file size. This log is the output of the size command, before and after
the code change:

before:
   text    data     bss     dec     hex filename
  30005   10264     128   40397    9dcd drivers/crypto/atmel-sha.o

after:
   text    data     bss     dec     hex filename
  29934   10208      64   40206    9d0e drivers/crypto/atmel-sha.o

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: omap-sham - remove unnecessary static in omap_sham_remove()
Gustavo A. R. Silva [Tue, 18 Jul 2017 23:03:11 +0000 (18:03 -0500)]
crypto: omap-sham - remove unnecessary static in omap_sham_remove()

Remove unnecessary static on local variable dd. Such variable
is initialized before being used, on every execution path throughout
the function. The static has no benefit and, removing it reduces the
object file size.

This issue was detected using Coccinelle and the following semantic patch:
https://github.com/GustavoARSilva/coccinelle/blob/master/static/static_unused.cocci

In the following log you can see a difference in the object file size.
This log is the output of the size command, before and after the code
change:

before:
   text    data     bss     dec     hex filename
  26135   11944     128   38207    953f drivers/crypto/omap-sham.o

after:
   text    data     bss     dec     hex filename
  26084   11856      64   38004    9474 drivers/crypto/omap-sham.o

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: n2 - Convert to using %pOF instead of full_name
Rob Herring [Tue, 18 Jul 2017 21:42:56 +0000 (16:42 -0500)]
crypto: n2 - Convert to using %pOF instead of full_name

Now that we have a custom printf format specifier, convert users of
full_name to use %pOF instead. This is preparation to remove storing
of the full path string for each node.

Signed-off-by: Rob Herring <robh@kernel.org>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: linux-crypto@vger.kernel.org
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: caam/jr - add support for DPAA2 parts
Horia Geantă [Tue, 18 Jul 2017 15:30:47 +0000 (18:30 +0300)]
crypto: caam/jr - add support for DPAA2 parts

Add support for using the caam/jr backend on DPAA2-based SoCs.
These have some particularities we have to account for:
-HW S/G format is different
-Management Complex (MC) firmware initializes / manages (partially)
the CAAM block: MCFGR, QI enablement in QICTL, RNG

Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocsrypto: ccp - Expand RSA support for a v5 ccp
Gary R Hook [Mon, 17 Jul 2017 20:16:42 +0000 (15:16 -0500)]
csrypto: ccp - Expand RSA support for a v5 ccp

A version 5 CCP can handle an RSA modulus up to 16k bits.

Signed-off-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: ccp - Add support for RSA on the CCP
Gary R Hook [Mon, 17 Jul 2017 20:16:32 +0000 (15:16 -0500)]
crypto: ccp - Add support for RSA on the CCP

Wire up the CCP as an RSA cipher provider.

Signed-off-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: Add akcipher_set_reqsize() function
Gary R Hook [Mon, 17 Jul 2017 20:16:21 +0000 (15:16 -0500)]
crypto: Add akcipher_set_reqsize() function

Signed-off-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: ccp - Fix base RSA function for version 5 CCPs
Gary R Hook [Mon, 17 Jul 2017 20:16:13 +0000 (15:16 -0500)]
crypto: ccp - Fix base RSA function for version 5 CCPs

Version 5 devices have requirements for buffer lengths, as well as
parameter format (e.g. bits vs. bytes). Fix the base CCP driver
code to meet requirements all supported versions.

Signed-off-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: ccp - Update copyright dates for 2017.
Gary R Hook [Mon, 17 Jul 2017 20:00:49 +0000 (15:00 -0500)]
crypto: ccp - Update copyright dates for 2017.

Some updates this year have not had copyright dates changed in modified
files. Correct this for 2017.

Signed-off-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: rng - ensure that the RNG is ready before using
Jason A. Donenfeld [Sun, 16 Jul 2017 17:22:06 +0000 (19:22 +0200)]
crypto: rng - ensure that the RNG is ready before using

Otherwise, we might be seeding the RNG using bad randomness, which is
dangerous. The one use of this function from within the kernel -- not
from userspace -- is being removed (keys/big_key), so that call site
isn't relevant in assessing this.

Cc: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: stm32 - Support for STM32 HASH module
lionel.debieve@st.com [Thu, 13 Jul 2017 13:32:27 +0000 (15:32 +0200)]
crypto: stm32 - Support for STM32 HASH module

This module register a HASH module that support multiples
algorithms: MD5, SHA1, SHA224, SHA256.

It includes the support of HMAC hardware processing corresponding
to the supported algorithms. DMA or IRQ mode are used depending
on data length.

Signed-off-by: Lionel Debieve <lionel.debieve@st.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agodt-bindings: Document STM32 HASH bindings
lionel.debieve@st.com [Thu, 13 Jul 2017 13:32:26 +0000 (15:32 +0200)]
dt-bindings: Document STM32 HASH bindings

This adds documentation of device tree bindings for the STM32
HASH controller.

Signed-off-by: Lionel Debieve <lionel.debieve@st.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: stm32 - Rename module to use generic crypto
lionel.debieve@st.com [Thu, 13 Jul 2017 13:06:33 +0000 (15:06 +0200)]
crypto: stm32 - Rename module to use generic crypto

The complete stm32 module is rename as crypto
in order to use generic naming

Signed-off-by: Lionel Debieve <lionel.debieve@st.com>
Reviewed-by: Fabien Dessenne <fabien.dessenne@st.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: stm32 - solve crc issue during unbind
lionel.debieve@st.com [Thu, 13 Jul 2017 13:06:32 +0000 (15:06 +0200)]
crypto: stm32 - solve crc issue during unbind

Use the correct unregister_shashes function to
to remove the registered algo

Signed-off-by: Lionel Debieve <lionel.debieve@st.com>
Reviewed-by: Fabien Dessenne <fabien.dessenne@st.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: stm32 - CRC use relaxed function
lionel.debieve@st.com [Thu, 13 Jul 2017 13:06:31 +0000 (15:06 +0200)]
crypto: stm32 - CRC use relaxed function

In case of arm soc support, readl and writel will
be optimized using relaxed functions

Signed-off-by: Lionel Debieve <lionel.debieve@st.com>
Reviewed-by: Fabien Dessenne <fabien.dessenne@st.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: caam - free qman_fq after kill_fq
Xulin Sun [Thu, 13 Jul 2017 09:21:01 +0000 (05:21 -0400)]
crypto: caam - free qman_fq after kill_fq

kill_fq removes a complete frame queue, it needs to free the qman_fq
in the last. Else kmemleak will report the below warning:

unreferenced object 0xffff800073085c80 (size 128):
  comm "cryptomgr_test", pid 199, jiffies 4294937850 (age 67.840s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 a0 80 7e 00 00 80 ff ff
    00 00 00 00 00 00 00 00 04 00 04 00 5c 01 00 00
  backtrace:
    [<ffff8000001e5760>] create_object+0xf8/0x258
    [<ffff800000994e38>] kmemleak_alloc+0x58/0xa0
    [<ffff8000001d5f18>] kmem_cache_alloc_trace+0x2c8/0x358
    [<ffff8000007e8410>] create_caam_req_fq+0x40/0x170
    [<ffff8000007e870c>] caam_drv_ctx_update+0x54/0x248
    [<ffff8000007fca54>] aead_setkey+0x154/0x300
    [<ffff800000452120>] setkey+0x50/0xf0
    [<ffff80000045b144>] __test_aead+0x5ec/0x1028
    [<ffff80000045c28c>] test_aead+0x44/0xc8
    [<ffff80000045c368>] alg_test_aead+0x58/0xd0
    [<ffff80000045bdb4>] alg_test+0x14c/0x308
    [<ffff8000004588e8>] cryptomgr_test+0x50/0x58
    [<ffff8000000c3b2c>] kthread+0xdc/0xf0
    [<ffff800000083c00>] ret_from_fork+0x10/0x50

And check where the function kill_fq() is called to remove
the additional kfree to qman_fq and avoid re-calling the released qman_fq.

Signed-off-by: Xulin Sun <xulin.sun@windriver.com>
Acked-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: algif_aead - overhaul memory management
Stephan Mueller [Sun, 25 Jun 2017 15:12:59 +0000 (17:12 +0200)]
crypto: algif_aead - overhaul memory management

The updated memory management is described in the top part of the code.
As one benefit of the changed memory management, the AIO and synchronous
operation is now implemented in one common function. The AF_ALG
operation uses the async kernel crypto API interface for each cipher
operation. Thus, the only difference between the AIO and sync operation
types visible from user space is:

1. the callback function to be invoked when the asynchronous operation
   is completed

2. whether to wait for the completion of the kernel crypto API operation
   or not

The change includes the overhaul of the TX and RX SGL handling. The TX
SGL holding the data sent from user space to the kernel is now dynamic
similar to algif_skcipher. This dynamic nature allows a continuous
operation of a thread sending data and a second thread receiving the
data. These threads do not need to synchronize as the kernel processes
as much data from the TX SGL to fill the RX SGL.

The caller reading the data from the kernel defines the amount of data
to be processed. Considering that the interface covers AEAD
authenticating ciphers, the reader must provide the buffer in the
correct size. Thus the reader defines the encryption size.

Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
6 years agocrypto: algif_skcipher - overhaul memory management
Stephan Mueller [Sun, 25 Jun 2017 15:12:39 +0000 (17:12 +0200)]
crypto: algif_skcipher - overhaul memory management

The updated memory management is described in the top part of the code.
As one benefit of the changed memory management, the AIO and synchronous
operation is now implemented in one common function. The AF_ALG
operation uses the async kernel crypto API interface for each cipher
operation. Thus, the only difference between the AIO and sync operation
types visible from user space is:

1. the callback function to be invoked when the asynchronous operation
   is completed

2. whether to wait for the completion of the kernel crypto API operation
   or not

In addition, the code structure is adjusted to match the structure of
algif_aead for easier code assessment.

The user space interface changed slightly as follows: the old AIO
operation returned zero upon success and < 0 in case of an error to user
space. As all other AF_ALG interfaces (including the sync skcipher
interface) returned the number of processed bytes upon success and < 0
in case of an error, the new skcipher interface (regardless of AIO or
sync) returns the number of processed bytes in case of success.

Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agohwrng: remember rng chosen by user
Harald Freudenberger [Tue, 11 Jul 2017 07:36:23 +0000 (09:36 +0200)]
hwrng: remember rng chosen by user

When a user chooses a rng source via sysfs attribute
this rng should be sticky, even when other sources
with better quality to register. This patch introduces
a simple way to remember the user's choice. This is
reflected by a new sysfs attribute file 'rng_selected'
which shows if the current rng has been chosen by
userspace. The new attribute file shows '1' for user
selected rng and '0' otherwise.

Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com>
Reviewed-by: PrasannaKumar Muralidharan <prasannatsmkumar@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agohwrng: use rng source with best quality
Harald Freudenberger [Tue, 11 Jul 2017 07:36:22 +0000 (09:36 +0200)]
hwrng: use rng source with best quality

This patch rewoks the hwrng to always use the
rng source with best entropy quality.

On registation and unregistration the hwrng now
tries to choose the best (= highest quality value)
rng source. The handling of the internal list
of registered rng sources is now always sorted
by quality and the top most rng chosen.

Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com>
Reviewed-by: PrasannaKumar Muralidharan <prasannatsmkumar@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: caam - fix condition for the jump over key(s) command
Tudor Ambarus [Mon, 10 Jul 2017 05:40:39 +0000 (08:40 +0300)]
crypto: caam - fix condition for the jump over key(s) command

SELF condition has no meaning for the SERIAL sharing since the jobs
are executed in the same DECO.

Signed-off-by: Tudor Ambarus <tudor-dan.ambarus@nxp.com>
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: caam - clean-up in caam_init_rng()
Horia Geantă [Mon, 10 Jul 2017 05:40:38 +0000 (08:40 +0300)]
crypto: caam - clean-up in caam_init_rng()

Clean up the code, as indicated by Coccinelle.

Cc: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: caam - remove unused variables in caam_drv_private
Tudor Ambarus [Mon, 10 Jul 2017 05:40:37 +0000 (08:40 +0300)]
crypto: caam - remove unused variables in caam_drv_private

Signed-off-by: Tudor Ambarus <tudor-dan.ambarus@nxp.com>
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: caam - remove unused sg_to_sec4_sg_len()
Horia Geantă [Mon, 10 Jul 2017 05:40:36 +0000 (08:40 +0300)]
crypto: caam - remove unused sg_to_sec4_sg_len()

sg_to_sec4_sg_len() is no longer used since
commit 479bcc7c5b9e ("crypto: caam - Convert authenc to new AEAD interface")

Its functionality has been superseded by the usage of sg_nents_for_len()
returning the number of S/G entries corresponding to the provided length.

Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: caam/qi - lower driver verbosity
Horia Geantă [Mon, 10 Jul 2017 05:40:35 +0000 (08:40 +0300)]
crypto: caam/qi - lower driver verbosity

Change log level for some prints from dev_info() to dev_dbg(), low-level
details are needed only when debugging.

Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: caam/qi - remove unused header sg_sw_sec4.h
Horia Geantă [Mon, 10 Jul 2017 05:40:34 +0000 (08:40 +0300)]
crypto: caam/qi - remove unused header sg_sw_sec4.h

sg_sw_sec4.h header is not used by caam/qi, thus remove its inclusion.

Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: caam/qi - explicitly set dma_ops
Horia Geantă [Mon, 10 Jul 2017 05:40:33 +0000 (08:40 +0300)]
crypto: caam/qi - explicitly set dma_ops

Since ARM64 commit 1dccb598df549 ("arm64: simplify dma_get_ops"),
dma_ops no longer default to swiotlb_dma_ops, but to dummy_dma_ops.

dma_ops have to be explicitly set in the driver - at least for ARM64.

Fixes: 67c2315def06 ("crypto: caam - add Queue Interface (QI) backend support")
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: caam/qi - fix AD length endianness in S/G entry
Horia Geantă [Mon, 10 Jul 2017 05:40:32 +0000 (08:40 +0300)]
crypto: caam/qi - fix AD length endianness in S/G entry

Associated data (AD) length is read by CAAM from an S/G entry
that is initially filled by the GPP.
Accordingly, AD length has to be stored in CAAM endianness.

Fixes: b189817cf789 ("crypto: caam/qi - add ablkcipher and authenc algorithms")
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: caam/qi - handle large number of S/Gs case
Horia Geantă [Mon, 10 Jul 2017 05:40:31 +0000 (08:40 +0300)]
crypto: caam/qi - handle large number of S/Gs case

For more than 16 S/G entries, driver currently corrupts memory
on ARMv8, see below KASAN log.
Note: this does not reproduce on PowerPC due to different (smaller)
cache line size - 64 bytes on PPC vs. 128 bytes on ARMv8.

One such use case is one of the cbc(aes) test vectors - with 8 S/G
entries and src != dst. Driver needs 1 (IV) + 2 x 8 = 17 entries,
which goes over the 16 S/G entries limit:
(CAAM_QI_MEMCACHE_SIZE - offsetof(struct ablkcipher_edesc, sgt)) /
sizeof(struct qm_sg_entry) = 256 / 16 = 16 S/Gs

Fix this by:
-increasing object size in caamqicache pool from 512 to 768; this means
the maximum number of S/G entries grows from (at least) 16 to 32
(again, for ARMv8 case of 128-byte cache line)
-add checks in the driver to fail gracefully (ENOMEM) in case the 32 S/G
entries limit is exceeded

==================================================================
BUG: KASAN: slab-out-of-bounds in ablkcipher_edesc_alloc+0x4ec/0xf60
Write of size 1 at addr ffff800021cb6003 by task cryptomgr_test/1394

CPU: 3 PID: 1394 Comm: cryptomgr_test Not tainted 4.12.0-rc7-next-20170703-00023-g72badbcc1ea7-dirty #26
Hardware name: LS1046A RDB Board (DT)
Call trace:
[<ffff20000808ac6c>] dump_backtrace+0x0/0x290
[<ffff20000808b014>] show_stack+0x14/0x1c
[<ffff200008d62c00>] dump_stack+0xa4/0xc8
[<ffff200008264e40>] print_address_description+0x110/0x26c
[<ffff200008265224>] kasan_report+0x1d0/0x2fc
[<ffff2000082637b8>] __asan_store1+0x4c/0x54
[<ffff200008b4884c>] ablkcipher_edesc_alloc+0x4ec/0xf60
[<ffff200008b49304>] ablkcipher_encrypt+0x44/0xcc
[<ffff20000848a61c>] skcipher_encrypt_ablkcipher+0x120/0x138
[<ffff200008495014>] __test_skcipher+0xaec/0xe30
[<ffff200008497088>] test_skcipher+0x6c/0xd8
[<ffff200008497154>] alg_test_skcipher+0x60/0xe4
[<ffff2000084974c4>] alg_test.part.13+0x130/0x304
[<ffff2000084976d4>] alg_test+0x3c/0x68
[<ffff2000084938ac>] cryptomgr_test+0x54/0x5c
[<ffff20000810276c>] kthread+0x188/0x1c8
[<ffff2000080836c0>] ret_from_fork+0x10/0x50

Allocated by task 1394:
 save_stack_trace_tsk+0x0/0x1ac
 save_stack_trace+0x18/0x20
 kasan_kmalloc.part.5+0x48/0x110
 kasan_kmalloc+0x84/0xa0
 kasan_slab_alloc+0x14/0x1c
 kmem_cache_alloc+0x124/0x1e8
 qi_cache_alloc+0x28/0x58
 ablkcipher_edesc_alloc+0x244/0xf60
 ablkcipher_encrypt+0x44/0xcc
 skcipher_encrypt_ablkcipher+0x120/0x138
 __test_skcipher+0xaec/0xe30
 test_skcipher+0x6c/0xd8
 alg_test_skcipher+0x60/0xe4
 alg_test.part.13+0x130/0x304
 alg_test+0x3c/0x68
 cryptomgr_test+0x54/0x5c
 kthread+0x188/0x1c8
 ret_from_fork+0x10/0x50

Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff800021cb5e00
 which belongs to the cache caamqicache of size 512
The buggy address is located 3 bytes to the right of
 512-byte region [ffff800021cb5e00ffff800021cb6000)
The buggy address belongs to the page:
page:ffff7e0000872d00 count:1 mapcount:0 mapping:          (null)
index:0x0 compound_mapcount: 0
flags: 0xfffc00000008100(slab|head)
raw: 0fffc00000008100 0000000000000000 0000000000000000 0000000180190019
raw: dead000000000100 dead000000000200 ffff800931268200 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff800021cb5f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff800021cb5f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff800021cb6000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                   ^
 ffff800021cb6080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff800021cb6100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================

Fixes: b189817cf789 ("crypto: caam/qi - add ablkcipher and authenc algorithms")
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: caam/qi - properly set IV after {en,de}crypt
Horia Geantă [Mon, 10 Jul 2017 05:40:30 +0000 (08:40 +0300)]
crypto: caam/qi - properly set IV after {en,de}crypt

caam/qi needs a fix similar to what was done for caam/jr in
commit "crypto: caam/qi - properly set IV after {en,de}crypt",
to allow for ablkcipher/skcipher chunking/streaming.

Cc: <stable@vger.kernel.org>
Fixes: b189817cf789 ("crypto: caam/qi - add ablkcipher and authenc algorithms")
Suggested-by: David Gstir <david@sigma-star.at>
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: caam/qi - fix compilation with CONFIG_DEBUG_FORCE_WEAK_PER_CPU=y
Horia Geantă [Mon, 10 Jul 2017 05:40:29 +0000 (08:40 +0300)]
crypto: caam/qi - fix compilation with CONFIG_DEBUG_FORCE_WEAK_PER_CPU=y

caam/qi driver fails to compile when CONFIG_DEBUG_FORCE_WEAK_PER_CPU=y.
Fix it by making the offending local per_cpu variable global.

Cc: <stable@vger.kernel.org>
Fixes: 67c2315def06c ("crypto: caam - add Queue Interface (QI) backend support")
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: caam/qi - fix compilation with DEBUG enabled
Horia Geantă [Mon, 10 Jul 2017 05:40:28 +0000 (08:40 +0300)]
crypto: caam/qi - fix compilation with DEBUG enabled

caam/qi driver does not compile when DEBUG is enabled
(CRYPTO_DEV_FSL_CAAM_DEBUG=y):

drivers/crypto/caam/caamalg_qi.c: In function 'ablkcipher_done':
drivers/crypto/caam/caamalg_qi.c:794:2: error: implicit declaration of function 'dbg_dump_sg' [-Werror=implicit-function-declaration]
  dbg_dump_sg(KERN_ERR, "dst    @" __stringify(__LINE__)": ",

Since dbg_dump_sg() is shared between caam/jr and caam/qi, move it
in a shared location and export it.

At the same time:
-reduce ifdeferry by providing a no-op implementation for !DEBUG case
-rename it to caam_dump_sg() to be consistent in terms of
exported symbols namespace (caam_*)

Cc: <stable@vger.kernel.org>
Fixes: b189817cf789 ("crypto: caam/qi - add ablkcipher and authenc algorithms")
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: caam/qi - fix typo in authenc alg driver name
Horia Geantă [Mon, 10 Jul 2017 05:40:27 +0000 (08:40 +0300)]
crypto: caam/qi - fix typo in authenc alg driver name

s/desi/des for echainiv(authenc(hmac(sha256),cbc(des))) alg.

Cc: <stable@vger.kernel.org>
Fixes: b189817cf7894 ("crypto: caam/qi - add ablkcipher and authenc algorithms")
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: brcm - add NULL check on of_match_device() return value
Gustavo A. R. Silva [Fri, 7 Jul 2017 06:33:33 +0000 (01:33 -0500)]
crypto: brcm - add NULL check on of_match_device() return value

Check return value from call to of_match_device()
in order to prevent a NULL pointer dereference.

In case of NULL print error message and return -ENODEV

Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: geode-aes - fixed coding style warnings and error
Chris Gorman [Thu, 6 Jul 2017 18:44:56 +0000 (14:44 -0400)]
crypto: geode-aes - fixed coding style warnings and error

fixed WARNING: Block comments should align the * on each line
fixed WARNINGs: Missing a blank line after declarations
fixed ERROR: space prohibited before that ',' (ctx:WxE)

Signed-off-by: Chris Gorman <chrisjohgorman@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: ccp - remove ccp_present() check from device initialize
Brijesh Singh [Thu, 6 Jul 2017 14:59:17 +0000 (09:59 -0500)]
crypto: ccp - remove ccp_present() check from device initialize

Since SP device driver supports multiples devices (e.g CCP, PSP), we
should not fail the driver init just because CCP device is not found.

Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Acked-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: ccp - rename ccp driver initialize files as sp device
Brijesh Singh [Thu, 6 Jul 2017 14:59:16 +0000 (09:59 -0500)]
crypto: ccp - rename ccp driver initialize files as sp device

CCP device initializes is now integerated into higher level SP device,
to avoid the confusion lets rename the ccp driver initialization files
(ccp-platform.c->sp-platform.c, ccp-pci.c->sp-pci.c). The patch does not
make any functional changes other than renaming file and structures

Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Acked-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: ccp - Abstract interrupt registeration
Brijesh Singh [Thu, 6 Jul 2017 14:59:15 +0000 (09:59 -0500)]
crypto: ccp - Abstract interrupt registeration

The CCP and PSP devices part of AMD Secure Procesor may share the same
interrupt. Hence we expand the SP device to register a common interrupt
handler and provide functions to CCP and PSP devices to register their
interrupt callback which will be invoked upon interrupt.

Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Acked-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: ccp - Introduce the AMD Secure Processor device
Brijesh Singh [Thu, 6 Jul 2017 14:59:14 +0000 (09:59 -0500)]
crypto: ccp - Introduce the AMD Secure Processor device

The CCP device is part of the AMD Secure Processor. In order to expand
the usage of the AMD Secure Processor, create a framework that allows
functional components of the AMD Secure Processor to be initialized and
handled appropriately.

Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Acked-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: ccp - Use devres interface to allocate PCI/iomap and cleanup
Brijesh Singh [Thu, 6 Jul 2017 14:59:13 +0000 (09:59 -0500)]
crypto: ccp - Use devres interface to allocate PCI/iomap and cleanup

Update pci and platform files to use devres interface to allocate the PCI
and iomap resources. Also add helper functions to consolicate module init,
exit and power mangagement code duplication.

Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Acked-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agoMAINTAINERS: add a maintainer for Microchip / Atmel ECC driver
Tudor-Dan Ambarus [Wed, 5 Jul 2017 10:08:00 +0000 (13:08 +0300)]
MAINTAINERS: add a maintainer for Microchip / Atmel ECC driver

A new cryptographic engine driver was added in
drivers/crypto/atmel-ecc.*.
Add myself as a maintainer for this driver.

Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: atmel-ecc - introduce Microchip / Atmel ECC driver
Tudor-Dan Ambarus [Wed, 5 Jul 2017 10:07:59 +0000 (13:07 +0300)]
crypto: atmel-ecc - introduce Microchip / Atmel ECC driver

Add ECDH support for ATECC508A (I2C) device.

The device features hardware acceleration for the NIST standard
P256 prime curve and supports the complete key life cycle from
private key generation to ECDH key agreement.

Random private key generation is supported internally within
the device to ensure that the private key can never be known
outside of the device. If the user wants to use its own private
keys, the driver will fallback to the ecdh software implementation.

Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: kpp - add get/set_flags helpers
Tudor-Dan Ambarus [Wed, 5 Jul 2017 10:07:58 +0000 (13:07 +0300)]
crypto: kpp - add get/set_flags helpers

These helpers will be used for fallbacks to kpp software
implementations.

Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: sun4i-ss - support the Security System PRNG
Corentin LABBE [Mon, 3 Jul 2017 18:48:48 +0000 (20:48 +0200)]
crypto: sun4i-ss - support the Security System PRNG

The Security System has a PRNG, this patch adds support for it via
crypto_rng.

Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: omap-des - fix error return code in omap_des_probe()
Gustavo A. R. Silva [Fri, 30 Jun 2017 07:07:04 +0000 (02:07 -0500)]
crypto: omap-des - fix error return code in omap_des_probe()

Print and propagate the return value of platform_get_irq on failure.

Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: omap-aes - fix error return code in omap_aes_probe()
Gustavo A. R. Silva [Fri, 30 Jun 2017 07:00:54 +0000 (02:00 -0500)]
crypto: omap-aes - fix error return code in omap_aes_probe()

Propagate the return value of platform_get_irq on failure.

Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: mxs-dcp - print error message on platform_get_irq failure
Gustavo A. R. Silva [Fri, 30 Jun 2017 06:54:16 +0000 (01:54 -0500)]
crypto: mxs-dcp - print error message on platform_get_irq failure

Print error message on platform_get_irq failure before return.

Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: mxc-scc - fix error code in mxc_scc_probe()
Gustavo A. R. Silva [Fri, 30 Jun 2017 06:42:12 +0000 (01:42 -0500)]
crypto: mxc-scc - fix error code in mxc_scc_probe()

Print and propagate the return value of platform_get_irq on failure.

Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: mediatek - fix error return code in mtk_crypto_probe()
Gustavo A. R. Silva [Fri, 30 Jun 2017 06:24:54 +0000 (01:24 -0500)]
crypto: mediatek - fix error return code in mtk_crypto_probe()

Propagate the return value of platform_get_irq on failure.

Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: ccp - print error message on platform_get_irq failure
Gustavo A. R. Silva [Fri, 30 Jun 2017 05:59:52 +0000 (00:59 -0500)]
crypto: ccp - print error message on platform_get_irq failure

Print error message on platform_get_irq failure before return.

Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: ccp - Provide an error path for debugfs setup failure
Gary R Hook [Wed, 28 Jun 2017 16:56:47 +0000 (11:56 -0500)]
crypto: ccp - Provide an error path for debugfs setup failure

Changes since v2:
  - On failure remove only the DebugFS heirarchy for this device
Changes since v1:
  - Remove unneeded local variable

Signed-off-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: ccp - Change all references to use the JOB ID macro
Gary R Hook [Tue, 27 Jun 2017 13:58:16 +0000 (08:58 -0500)]
crypto: ccp - Change all references to use the JOB ID macro

Use the CCP_NEW_JOBID() macro when assigning an identifier

Signed-off-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: ccp - Fix some line spacing
Gary R Hook [Tue, 27 Jun 2017 13:58:04 +0000 (08:58 -0500)]
crypto: ccp - Fix some line spacing

Add/remove blank lines as appropriate.

Signed-off-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: sahara - make of_device_ids const
Arvind Yadav [Tue, 27 Jun 2017 11:41:23 +0000 (17:11 +0530)]
crypto: sahara - make of_device_ids const

of_device_ids are not supposed to change at runtime. All functions
working with of_device_ids provided by <linux/of.h> work with const
of_device_ids. So mark the non-const structs as const.

File size before:
   text    data     bss     dec     hex filename
   9759    2736       8   12503    30d7 drivers/crypto/sahara.o

File size after constify:
   text    data     bss     dec     hex filename
  10367    2128       8   12503    30d7 drivers/crypto/sahara.o

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: qat - fix spelling mistake: "runing" -> "running"
Colin Ian King [Mon, 26 Jun 2017 19:41:03 +0000 (20:41 +0100)]
crypto: qat - fix spelling mistake: "runing" -> "running"

trivial fix to spelling mistake in dev_info message

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: virtio - Refacotor virtio_crypto driver for new virito crypto services
Zeng, Xin [Fri, 23 Jun 2017 15:31:19 +0000 (11:31 -0400)]
crypto: virtio - Refacotor virtio_crypto driver for new virito crypto services

In current virtio crypto device driver, some common data structures and
implementations that should be used by other virtio crypto algorithms
(e.g. asymmetric crypto algorithms) introduce symmetric crypto algorithms
specific implementations.
This patch refactors these pieces of code so that they can be reused by
other virtio crypto algorithms.

Acked-by: Gonglei <arei.gonglei@huawei.com>
Signed-off-by: Xin Zeng <xin.zeng@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: authencesn - Fix digest_null crash
Herbert Xu [Mon, 17 Jul 2017 07:32:30 +0000 (15:32 +0800)]
crypto: authencesn - Fix digest_null crash

When authencesn is used together with digest_null a crash will
occur on the decrypt path.  This is because normally we perform
a special setup to preserve the ESN, but this is skipped if there
is no authentication.  However, on the post-authentication path
it always expects the preservation to be in place, thus causing
a crash when digest_null is used.

This patch fixes this by also skipping the post-processing when
there is no authentication.

Fixes: 104880a6b470 ("crypto: authencesn - Convert to new AEAD...")
Cc: <stable@vger.kernel.org>
Reported-by: Jan Tluka <jtluka@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: brcm - remove BCM_PDC_MBOX dependency in Kconfig
raveendra padasalagi [Tue, 11 Jul 2017 10:20:06 +0000 (15:50 +0530)]
crypto: brcm - remove BCM_PDC_MBOX dependency in Kconfig

SPU driver is dependent on generic MAILBOX API's to
communicate with underlying DMA engine driver.

So this patch removes BCM_PDC_MBOX "depends on" for SPU driver
in Kconfig and adds MAILBOX as dependent module.

Fixes: 9d12ba86f818 ("crypto: brcm - Add Broadcom SPU driver")
Signed-off-by: Raveendra Padasalagi <raveendra.padasalagi@broadcom.com>
Reviewed-by: Ray Jui <ray.jui@broadcom.com>
Reviewed-by: Scott Branden <scott.branden@broadcom.com>
Cc: stable@vger.kernel.org
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agoDocumentation/bindings: crypto: remove the dma-mask property
Antoine Ténart [Fri, 23 Jun 2017 14:52:18 +0000 (16:52 +0200)]
Documentation/bindings: crypto: remove the dma-mask property

The dma-mask property is broken and was removed in the device trees
having a safexcel-eip197 node and in the safexcel cryptographic
driver. This patch removes the dma-mask property from the documentation
as well.

Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: inside-secure - do not parse the dma mask from dt
Antoine Ténart [Fri, 23 Jun 2017 14:05:25 +0000 (16:05 +0200)]
crypto: inside-secure - do not parse the dma mask from dt

Remove the dma mask parsing from dt as this should not be encoded into
the engine device tree node. Keep the fallback value for now, which
should work for the boards already supported upstream.

Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: cavium/nitrox - Change in firmware path.
Srikanth Jampala [Fri, 23 Jun 2017 10:33:51 +0000 (16:03 +0530)]
crypto: cavium/nitrox - Change in firmware path.

Moved the firmware to "cavium" subdirectory as suggested by
Kyle McMartin.

Signed-off-by: Srikanth Jampala <Jampala.Srikanth@cavium.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agocrypto: brcm - Fix SHA3-512 algorithm failure
raveendra padasalagi [Fri, 23 Jun 2017 09:04:08 +0000 (14:34 +0530)]
crypto: brcm - Fix SHA3-512 algorithm failure

In Broadcom SPU driver, due to missing break statement
in spu2_hash_xlate() while mapping SPU2 equivalent
SHA3-512 value, -EINVAL is chosen and hence leading to
failure of SHA3-512 algorithm. This patch fixes the same.

Fixes: 9d12ba86f818 ("crypto: brcm - Add Broadcom SPU driver")
Signed-off-by: Raveendra Padasalagi <raveendra.padasalagi@broadcom.com>
Reviewed-by: Ray Jui <ray.jui@broadcom.com>
Reviewed-by: Scott Branden <scott.branden@broadcom.com>
Cc: stable@vger.kernel.org
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
7 years agoLinux v4.13-rc1 v4.13-rc1
Linus Torvalds [Sat, 15 Jul 2017 22:22:10 +0000 (15:22 -0700)]
Linux v4.13-rc1

7 years agoMerge tag 'standardize-docs' of git://git.lwn.net/linux
Linus Torvalds [Sat, 15 Jul 2017 19:58:58 +0000 (12:58 -0700)]
Merge tag 'standardize-docs' of git://git.lwn.net/linux

Pull documentation format standardization from Jonathan Corbet:
 "This series converts a number of top-level documents to the RST format
  without incorporating them into the Sphinx tree. The hope is to bring
  some uniformity to kernel documentation and, perhaps more importantly,
  have our existing docs serve as an example of the desired formatting
  for those that will be added later.

  Mauro has gone through and fixed up a lot of top-level documentation
  files to make them conform to the RST format, but without moving or
  renaming them in any way. This will help when we incorporate the ones
  we want to keep into the Sphinx doctree, but the real purpose is to
  bring a bit of uniformity to our documentation and let the top-level
  docs serve as examples for those writing new ones"

* tag 'standardize-docs' of git://git.lwn.net/linux: (84 commits)
  docs: kprobes.txt: Fix whitespacing
  tee.txt: standardize document format
  cgroup-v2.txt: standardize document format
  dell_rbu.txt: standardize document format
  zorro.txt: standardize document format
  xz.txt: standardize document format
  xillybus.txt: standardize document format
  vfio.txt: standardize document format
  vfio-mediated-device.txt: standardize document format
  unaligned-memory-access.txt: standardize document format
  this_cpu_ops.txt: standardize document format
  svga.txt: standardize document format
  static-keys.txt: standardize document format
  smsc_ece1099.txt: standardize document format
  SM501.txt: standardize document format
  siphash.txt: standardize document format
  sgi-ioc4.txt: standardize document format
  SAK.txt: standardize document format
  rpmsg.txt: standardize document format
  robust-futexes.txt: standardize document format
  ...

7 years agoMerge tag 'random_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso...
Linus Torvalds [Sat, 15 Jul 2017 19:44:02 +0000 (12:44 -0700)]
Merge tag 'random_for_linus' of git://git./linux/kernel/git/tytso/random

Pull random updates from Ted Ts'o:
 "Add wait_for_random_bytes() and get_random_*_wait() functions so that
  callers can more safely get random bytes if they can block until the
  CRNG is initialized.

  Also print a warning if get_random_*() is called before the CRNG is
  initialized. By default, only one single-line warning will be printed
  per boot. If CONFIG_WARN_ALL_UNSEEDED_RANDOM is defined, then a
  warning will be printed for each function which tries to get random
  bytes before the CRNG is initialized. This can get spammy for certain
  architecture types, so it is not enabled by default"

* tag 'random_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random:
  random: reorder READ_ONCE() in get_random_uXX
  random: suppress spammy warnings about unseeded randomness
  random: warn when kernel uses unseeded randomness
  net/route: use get_random_int for random counter
  net/neighbor: use get_random_u32 for 32-bit hash random
  rhashtable: use get_random_u32 for hash_rnd
  ceph: ensure RNG is seeded before using
  iscsi: ensure RNG is seeded before use
  cifs: use get_random_u32 for 32-bit lock random
  random: add get_random_{bytes,u32,u64,int,long,once}_wait family
  random: add wait_for_random_bytes() API

7 years agoMerge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Linus Torvalds [Sat, 15 Jul 2017 19:00:42 +0000 (12:00 -0700)]
Merge branch 'work.mount' of git://git./linux/kernel/git/viro/vfs

Pull ->s_options removal from Al Viro:
 "Preparations for fsmount/fsopen stuff (coming next cycle). Everything
  gets moved to explicit ->show_options(), killing ->s_options off +
  some cosmetic bits around fs/namespace.c and friends. Basically, the
  stuff needed to work with fsmount series with minimum of conflicts
  with other work.

  It's not strictly required for this merge window, but it would reduce
  the PITA during the coming cycle, so it would be nice to have those
  bits and pieces out of the way"

* 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  isofs: Fix isofs_show_options()
  VFS: Kill off s_options and helpers
  orangefs: Implement show_options
  9p: Implement show_options
  isofs: Implement show_options
  afs: Implement show_options
  affs: Implement show_options
  befs: Implement show_options
  spufs: Implement show_options
  bpf: Implement show_options
  ramfs: Implement show_options
  pstore: Implement show_options
  omfs: Implement show_options
  hugetlbfs: Implement show_options
  VFS: Don't use save/replace_mount_options if not using generic_show_options
  VFS: Provide empty name qstr
  VFS: Make get_filesystem() return the affected filesystem
  VFS: Clean up whitespace in fs/namespace.c and fs/super.c
  Provide a function to create a NUL-terminated string from unterminated data