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authorArd Biesheuvel <ard.biesheuvel@linaro.org>2018-08-22 10:51:44 +0200
committerHerbert Xu <herbert@gondor.apana.org.au>2018-09-04 11:37:04 +0800
commitab8085c130edd65be0d95cc95c28b51c4c6faf9d (patch)
tree7c73b7bb77e36f184cae8609576276aeeec85d44 /crypto/Kconfig
parent820684cc269f8295f13c890491dcbe07fdc647af (diff)
downloadlinux-ab8085c130edd65be0d95cc95c28b51c4c6faf9d.tar.bz2
crypto: x86 - remove SHA multibuffer routines and mcryptd
As it turns out, the AVX2 multibuffer SHA routines are currently broken [0], in a way that would have likely been noticed if this code were in wide use. Since the code is too complicated to be maintained by anyone except the original authors, and since the performance benefits for real-world use cases are debatable to begin with, it is better to drop it entirely for the moment. [0] https://marc.info/?l=linux-crypto-vger&m=153476243825350&w=2 Suggested-by: Eric Biggers <ebiggers@google.com> Cc: Megha Dey <megha.dey@linux.intel.com> Cc: Tim Chen <tim.c.chen@linux.intel.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/Kconfig')
-rw-r--r--crypto/Kconfig62
1 files changed, 0 insertions, 62 deletions
diff --git a/crypto/Kconfig b/crypto/Kconfig
index 59e32623a7ce..90f2811fac5f 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -213,20 +213,6 @@ config CRYPTO_CRYPTD
converts an arbitrary synchronous software crypto algorithm
into an asynchronous algorithm that executes in a kernel thread.
-config CRYPTO_MCRYPTD
- tristate "Software async multi-buffer crypto daemon"
- select CRYPTO_BLKCIPHER
- select CRYPTO_HASH
- select CRYPTO_MANAGER
- select CRYPTO_WORKQUEUE
- help
- This is a generic software asynchronous crypto daemon that
- provides the kernel thread to assist multi-buffer crypto
- algorithms for submitting jobs and flushing jobs in multi-buffer
- crypto algorithms. Multi-buffer crypto algorithms are executed
- in the context of this kernel thread and drivers can post
- their crypto request asynchronously to be processed by this daemon.
-
config CRYPTO_AUTHENC
tristate "Authenc support"
select CRYPTO_AEAD
@@ -848,54 +834,6 @@ config CRYPTO_SHA1_PPC_SPE
SHA-1 secure hash standard (DFIPS 180-4) implemented
using powerpc SPE SIMD instruction set.
-config CRYPTO_SHA1_MB
- tristate "SHA1 digest algorithm (x86_64 Multi-Buffer, Experimental)"
- depends on X86 && 64BIT
- select CRYPTO_SHA1
- select CRYPTO_HASH
- select CRYPTO_MCRYPTD
- help
- SHA-1 secure hash standard (FIPS 180-1/DFIPS 180-2) implemented
- using multi-buffer technique. This algorithm computes on
- multiple data lanes concurrently with SIMD instructions for
- better throughput. It should not be enabled by default but
- used when there is significant amount of work to keep the keep
- the data lanes filled to get performance benefit. If the data
- lanes remain unfilled, a flush operation will be initiated to
- process the crypto jobs, adding a slight latency.
-
-config CRYPTO_SHA256_MB
- tristate "SHA256 digest algorithm (x86_64 Multi-Buffer, Experimental)"
- depends on X86 && 64BIT
- select CRYPTO_SHA256
- select CRYPTO_HASH
- select CRYPTO_MCRYPTD
- help
- SHA-256 secure hash standard (FIPS 180-1/DFIPS 180-2) implemented
- using multi-buffer technique. This algorithm computes on
- multiple data lanes concurrently with SIMD instructions for
- better throughput. It should not be enabled by default but
- used when there is significant amount of work to keep the keep
- the data lanes filled to get performance benefit. If the data
- lanes remain unfilled, a flush operation will be initiated to
- process the crypto jobs, adding a slight latency.
-
-config CRYPTO_SHA512_MB
- tristate "SHA512 digest algorithm (x86_64 Multi-Buffer, Experimental)"
- depends on X86 && 64BIT
- select CRYPTO_SHA512
- select CRYPTO_HASH
- select CRYPTO_MCRYPTD
- help
- SHA-512 secure hash standard (FIPS 180-1/DFIPS 180-2) implemented
- using multi-buffer technique. This algorithm computes on
- multiple data lanes concurrently with SIMD instructions for
- better throughput. It should not be enabled by default but
- used when there is significant amount of work to keep the keep
- the data lanes filled to get performance benefit. If the data
- lanes remain unfilled, a flush operation will be initiated to
- process the crypto jobs, adding a slight latency.
-
config CRYPTO_SHA256
tristate "SHA224 and SHA256 digest algorithm"
select CRYPTO_HASH