| commit | 1e15682f1a4bb64c48b84884976a2b5c4201e878 | [log] [tgz] |
|---|---|---|
| author | David Benjamin <davidben@google.com> | Mon Dec 27 13:27:22 2021 -0500 |
| committer | Boringssl LUCI CQ <boringssl-scoped@luci-project-accounts.iam.gserviceaccount.com> | Wed Jan 05 19:59:15 2022 +0000 |
| tree | e2f58ca6a2ef2f01c9c3ddc6d7a6e19e8108a108 | |
| parent | af561c221d3af70bd0aa48024db4f1fcf1988eef [diff] |
Enable SHA-512 ARM acceleration when available. This imports the changes to sha512-armv8.pl from upstream's af0fcf7b4668218b24d9250b95e0b96939ccb4d1. Tweaks needed: - Add an explicit .text because we put .LK$BITS in .rodata for XOM - .LK$bits and code are in separate sections, so use adrp/add instead of plain adr - Where glibc needs feature flags to *enable* pthread_rwlock, Apple interprets _XOPEN_SOURCE as a request to *disable* Apple extensions. Tighten the condition on the _XOPEN_SOURCE check. Added support for macOS and Linux, tested manually on an ARM Mac and a VM, respectively. Fuchsia and Windows do not currently have APIs to expose this bit, so I've left in TODOs. Benchmarks from an Apple M1 Max: Before: Did 4647000 SHA-512 (16 bytes) operations in 1000103us (74.3 MB/sec) Did 1614000 SHA-512 (256 bytes) operations in 1000379us (413.0 MB/sec) Did 439000 SHA-512 (1350 bytes) operations in 1001694us (591.6 MB/sec) Did 76000 SHA-512 (8192 bytes) operations in 1011821us (615.3 MB/sec) Did 39000 SHA-512 (16384 bytes) operations in 1024311us (623.8 MB/sec) After: Did 10369000 SHA-512 (16 bytes) operations in 1000088us (165.9 MB/sec) [+123.1%] Did 3650000 SHA-512 (256 bytes) operations in 1000079us (934.3 MB/sec) [+126.2%] Did 1029000 SHA-512 (1350 bytes) operations in 1000521us (1388.4 MB/sec) [+134.7%] Did 175000 SHA-512 (8192 bytes) operations in 1001874us (1430.9 MB/sec) [+132.5%] Did 89000 SHA-512 (16384 bytes) operations in 1010314us (1443.3 MB/sec) [+131.4%] (This doesn't seem to change the overall SHA-256 vs SHA-512 performance question on ARM, when hashing perf matters. SHA-256 on the same chip gets up to 2454.6 MB/s.) In terms of build coverage, for now, we'll have build coverage everywhere and test coverage on Chromium, which runs this code on macOS CI. We should request a macOS ARM64 bot for our standalone CI. Longer term, we need a QEMU-based builder to test various features. QEMU seems to have pretty good coverage of all this, which will at least give us Linux. I haven't added an OPENSSL_STATIC_ARMCAP_SHA512 for now. Instead, we just look at the standard __ARM_FEATURE_SHA512 define. Strangely, the corresponding -march tag is not sha512. Neither GCC and nor Clang have -march=armv8-a+sha512. Instead, -march=armv8-a+sha3 implies both __ARM_FEATURE_SHA3 and __ARM_FEATURE_SHA512! Yet everything else seems to describe the SHA512 extension as separate from SHA3. https://developer.arm.com/architectures/system-architectures/software-standards/acle Update-Note: Consumers with a different build setup may need to limit -D_XOPEN_SOURCE=700 to Linux or non-Apple platforms. Otherwise, <sys/types.h> won't define some typedef needed by <sys/sysctl.h>. If you see a build error about u_char, etc., being undefined in some system header, that is probably the cause. Change-Id: Ia213d3796b84c71b7966bb68e0aec92e5d7d26f0 Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/50807 Reviewed-by: Adam Langley <agl@google.com> Commit-Queue: David Benjamin <davidben@google.com>
BoringSSL is a fork of OpenSSL that is designed to meet Google's needs.
Although BoringSSL is an open source project, it is not intended for general use, as OpenSSL is. We don't recommend that third parties depend upon it. Doing so is likely to be frustrating because there are no guarantees of API or ABI stability.
Programs ship their own copies of BoringSSL when they use it and we update everything as needed when deciding to make API changes. This allows us to mostly avoid compromises in the name of compatibility. It works for us, but it may not work for you.
BoringSSL arose because Google used OpenSSL for many years in various ways and, over time, built up a large number of patches that were maintained while tracking upstream OpenSSL. As Google's product portfolio became more complex, more copies of OpenSSL sprung up and the effort involved in maintaining all these patches in multiple places was growing steadily.
Currently BoringSSL is the SSL library in Chrome/Chromium, Android (but it's not part of the NDK) and a number of other apps/programs.
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