kernel/arch/arm/crypto/Makefile, branch linux-4.15.y

crypto: arm,arm64 - Fix random regeneration of S_shipped

2018-04-08T12:27:39Z

commit 6aaf49b495b446ff6eec0ac983f781ca0dc56a73 upstream. The decision to rebuild .S_shipped is made based on the relative timestamps of .S_shipped and .pl files but git makes this essentially random. This means that the perl script might run anyway (usually at most once per checkout), defeating the whole purpose of _shipped. Fix by skipping the rule unless explicit make variables are provided: REGENERATE_ARM_CRYPTO or REGENERATE_ARM64_CRYPTO. This can produce nasty occasional build failures downstream, for example for toolchains with broken perl. The solution is minimally intrusive to make it easier to push into stable. Another report on a similar issue here: https://lkml.org/lkml/2018/3/8/1379 Signed-off-by: Leonard Crestez Cc: Reviewed-by: Masahiro Yamada Acked-by: Ard Biesheuvel Signed-off-by: Herbert Xu Signed-off-by: Greg Kroah-Hartman

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02T10:10:55Z

Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart Reviewed-by: Philippe Ombredanne Reviewed-by: Thomas Gleixner Signed-off-by: Greg Kroah-Hartman

crypto: arm/crc32 - add build time test for CRC instruction support

2017-03-01T11:47:53Z

The accelerated CRC32 module for ARM may use either the scalar CRC32 instructions, the NEON 64x64 to 128 bit polynomial multiplication (vmull.p64) instruction, or both, depending on what the current CPU supports. However, this also requires support in binutils, and as it turns out, versions of binutils exist that support the vmull.p64 instruction but not the crc32 instructions. So refactor the Makefile logic so that this module only gets built if binutils has support for both. Signed-off-by: Ard Biesheuvel Acked-by: Jon Hunter Tested-by: Jon Hunter Signed-off-by: Herbert Xu

crypto: arm/aes - replace bit-sliced OpenSSL NEON code

2017-01-13T10:27:31Z

This replaces the unwieldy generated implementation of bit-sliced AES in CBC/CTR/XTS modes that originated in the OpenSSL project with a new version that is heavily based on the OpenSSL implementation, but has a number of advantages over the old version: - it does not rely on the scalar AES cipher that also originated in the OpenSSL project and contains redundant lookup tables and key schedule generation routines (which we already have in crypto/aes_generic.) - it uses the same expanded key schedule for encryption and decryption, reducing the size of the per-key data structure by 1696 bytes - it adds an implementation of AES in ECB mode, which can be wrapped by other generic chaining mode implementations - it moves the handling of corner cases that are non critical to performance to the glue layer written in C - it was written directly in assembler rather than generated from a Perl script Signed-off-by: Ard Biesheuvel Signed-off-by: Herbert Xu

crypto: arm/aes - replace scalar AES cipher

2017-01-12T16:26:50Z

This replaces the scalar AES cipher that originates in the OpenSSL project with a new implementation that is ~15% (*) faster (on modern cores), and reuses the lookup tables and the key schedule generation routines from the generic C implementation (which is usually compiled in anyway due to networking and other subsystems depending on it). Note that the bit sliced NEON code for AES still depends on the scalar cipher that this patch replaces, so it is not removed entirely yet. * On Cortex-A57, the performance increases from 17.0 to 14.9 cycles per byte for 128-bit keys. Signed-off-by: Ard Biesheuvel Signed-off-by: Herbert Xu

crypto: arm/chacha20 - implement NEON version based on SSE3 code

2017-01-12T16:26:48Z

This is a straight port to ARM/NEON of the x86 SSE3 implementation of the ChaCha20 stream cipher. It uses the new skcipher walksize attribute to process the input in strides of 4x the block size. Signed-off-by: Ard Biesheuvel Signed-off-by: Herbert Xu

Revert "crypto: arm64/ARM: NEON accelerated ChaCha20"

2016-12-28T09:39:26Z

This patch reverts the following commits: 8621caa0d45e731f2e9f5889ff5bb384fcd6e059 8096667273477e735b0072b11a6d617ccee45e5f I should not have applied them because they had already been obsoleted by a subsequent patch series. They also cause a build failure because of the subsequent commit 9ae433bc79f9. Fixes: 9ae433bc79f ("crypto: chacha20 - convert generic and...") Signed-off-by: Herbert Xu

crypto: arm/chacha20 - implement NEON version based on SSE3 code

2016-12-27T09:47:29Z

This is a straight port to ARM/NEON of the x86 SSE3 implementation of the ChaCha20 stream cipher. Signed-off-by: Ard Biesheuvel Signed-off-by: Herbert Xu

crypto: arm/crc32 - accelerated support based on x86 SSE implementation

2016-12-07T12:01:24Z

This is a combination of the the Intel algorithm implemented using SSE and PCLMULQDQ instructions from arch/x86/crypto/crc32-pclmul_asm.S, and the new CRC32 extensions introduced for both 32-bit and 64-bit ARM in version 8 of the architecture. Two versions of the above combo are provided, one for CRC32 and one for CRC32C. The PMULL/NEON algorithm is faster, but operates on blocks of at least 64 bytes, and on multiples of 16 bytes only. For the remaining input, or for all input on systems that lack the PMULL 64x64->128 instructions, the CRC32 instructions will be used. Signed-off-by: Ard Biesheuvel Signed-off-by: Herbert Xu

crypto: arm/crct10dif - port x86 SSE implementation to ARM

2016-12-07T12:01:21Z

This is a transliteration of the Intel algorithm implemented using SSE and PCLMULQDQ instructions that resides in the file arch/x86/crypto/crct10dif-pcl-asm_64.S, but simplified to only operate on buffers that are 16 byte aligned (but of any size) Signed-off-by: Ard Biesheuvel Signed-off-by: Herbert Xu