Adding upstream version 110.0.1.upstream/110.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

12 files changed, 929 insertions, 0 deletions

diff --git a/third_party/rust/cpufeatures/.cargo-checksum.json b/third_party/rust/cpufeatures/.cargo-checksum.json
new file mode 100644
index 0000000000..9e4f2df3a4
--- /dev/null
+++ b/third_party/rust/cpufeatures/.cargo-checksum.json
@@ -0,0 +1 @@
+{"files":{"CHANGELOG.md":"b451593f0440f2bbc63cd2e98535614151e9ab12f877dd8bd9f60dd3ca2b9a36","Cargo.toml":"2b7510bf73cf20e993411333b2301574d72dd6d6ce3a1c558b5c458b12d8cd33","LICENSE-APACHE":"a9040321c3712d8fd0b09cf52b17445de04a23a10165049ae187cd39e5c86be5","LICENSE-MIT":"904801faf3f1850328af8e1aa1047b9190cc22ed40df5c87f2d93d17f847ef67","README.md":"c991281c8d1525279b90dffd452bd731116eebc456ee3a23b9c997df402e8bf7","src/aarch64.rs":"697e8048929cbee0248657da956e8cc627d59ee3fc96729068fec6e7b089b7b6","src/lib.rs":"5b2e7c89dab1d2bed08a4fe09aaf9c5f17ccaa8316d31d5af545b86e7d6a6947","src/miri.rs":"acf1a7e7ae31a1de07941084c6b589a2d4c6ea5f87012c811592c865d04c02cb","src/x86.rs":"380575e3383ece930fea661c6f54201b04c23e4753154dab96031290f398709b","tests/aarch64.rs":"bdabbe67316c128b57003ba5faa07707b5f339b1f3e984da4bc383cc93c2bedd","tests/x86.rs":"fcf476ca6ebd0845ab547cea4fe40c2ba2a2324c024264d9a86f666586f3a480"},"package":"28d997bd5e24a5928dd43e46dc529867e207907fe0b239c3477d924f7f2ca320"}
\ No newline at end of file
diff --git a/third_party/rust/cpufeatures/CHANGELOG.md b/third_party/rust/cpufeatures/CHANGELOG.md
new file mode 100644
index 0000000000..dae3dd11a3
--- /dev/null
+++ b/third_party/rust/cpufeatures/CHANGELOG.md
@@ -0,0 +1,93 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## 0.2.5 (2022-09-04)
+### Fixed
+- Add workaround for [CPUID bug] in `std` ([#800])
+
+[CPUID bug]: https://github.com/rust-lang/rust/issues/101346
+[#800]: https://github.com/RustCrypto/utils/pull/800
+
+## 0.2.4 (2022-08-22)
+- Re-release v0.2.3 without any changes to fix [#795] ([#796])
+
+[#795]: https://github.com/RustCrypto/utils/issues/795
+[#796]: https://github.com/RustCrypto/utils/pull/796
+
+## 0.2.3 (2022-08-18)
+### Changed
+- Update `libc` version to v0.2.95 ([#789])
+- Disable all target features under MIRI ([#779])
+- Check AVX availability when detecting AVX2 and FMA ([#792])
+
+[#779]: https://github.com/RustCrypto/utils/pull/779
+[#789]: https://github.com/RustCrypto/utils/pull/789
+[#792]: https://github.com/RustCrypto/utils/pull/792
+
+## 0.2.2 (2022-03-18)
+### Added
+- Support for Android on `aarch64` ([#752])
+
+### Removed
+- Vestigial code around `crypto` target feature ([#600])
+
+[#600]: https://github.com/RustCrypto/utils/pull/600
+[#752]: https://github.com/RustCrypto/utils/pull/752
+
+## 0.2.1 (2021-08-26)
+### Changed
+- Revert [#583] "Use from_bytes_with_nul for string check" ([#597])
+
+[#583]: https://github.com/RustCrypto/utils/pull/583
+[#597]: https://github.com/RustCrypto/utils/pull/597
+
+## 0.2.0 (2021-08-26) [YANKED]
+### Removed
+- AArch64 `crypto` target feature ([#594])
+
+[#594]: https://github.com/RustCrypto/utils/pull/594
+
+## 0.1.5 (2021-06-21)
+### Added
+- iOS support ([#435], [#501])
+
+### Changed
+- Map `aarch64` HWCAPs to target features; add `crypto` ([#456])
+
+[#435]: https://github.com/RustCrypto/utils/pull/435
+[#456]: https://github.com/RustCrypto/utils/pull/456
+[#501]: https://github.com/RustCrypto/utils/pull/501
+
+## 0.1.4 (2021-05-14)
+### Added
+- Support compiling on non-Linux/macOS aarch64 targets ([#408])
+
+[#408]: https://github.com/RustCrypto/utils/pull/408
+
+## 0.1.3 (2021-05-13)
+### Removed
+- `neon` on `aarch64` targets: already enabled by default ([#406])
+
+[#406]: https://github.com/RustCrypto/utils/pull/406
+
+## 0.1.2 (2021-05-13) [YANKED]
+### Added
+- `neon` feature detection on `aarch64` targets ([#403])
+
+### Fixed
+- Support for `musl`-based targets ([#403])
+
+[#403]: https://github.com/RustCrypto/utils/pull/403
+
+## 0.1.1 (2021-05-06)
+### Added
+- `aarch64` support for Linux and macOS/M4 targets ([#393])
+
+[#393]: https://github.com/RustCrypto/utils/pull/393
+
+## 0.1.0 (2021-04-29)
+- Initial release
diff --git a/third_party/rust/cpufeatures/Cargo.toml b/third_party/rust/cpufeatures/Cargo.toml
new file mode 100644
index 0000000000..f9fea81359
--- /dev/null
+++ b/third_party/rust/cpufeatures/Cargo.toml
@@ -0,0 +1,38 @@
+# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
+#
+# When uploading crates to the registry Cargo will automatically
+# "normalize" Cargo.toml files for maximal compatibility
+# with all versions of Cargo and also rewrite `path` dependencies
+# to registry (e.g., crates.io) dependencies.
+#
+# If you are reading this file be aware that the original Cargo.toml
+# will likely look very different (and much more reasonable).
+# See Cargo.toml.orig for the original contents.
+
+[package]
+edition = "2018"
+name = "cpufeatures"
+version = "0.2.5"
+authors = ["RustCrypto Developers"]
+description = """
+Lightweight runtime CPU feature detection for x86/x86_64 and aarch64 with
+no_std support and support for mobile targets including Android and iOS
+"""
+documentation = "https://docs.rs/cpufeatures"
+readme = "README.md"
+keywords = [
+    "cpuid",
+    "target-feature",
+]
+categories = ["no-std"]
+license = "MIT OR Apache-2.0"
+repository = "https://github.com/RustCrypto/utils"
+
+[target.aarch64-apple-darwin.dependencies.libc]
+version = "0.2.95"
+
+[target.aarch64-linux-android.dependencies.libc]
+version = "0.2.95"
+
+[target."cfg(all(target_arch = \"aarch64\", target_os = \"linux\"))".dependencies.libc]
+version = "0.2.95"
diff --git a/third_party/rust/cpufeatures/LICENSE-APACHE b/third_party/rust/cpufeatures/LICENSE-APACHE
new file mode 100644
index 0000000000..78173fa2e7
--- /dev/null
+++ b/third_party/rust/cpufeatures/LICENSE-APACHE
@@ -0,0 +1,201 @@
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diff --git a/third_party/rust/cpufeatures/LICENSE-MIT b/third_party/rust/cpufeatures/LICENSE-MIT
new file mode 100644
index 0000000000..2726e14a40
--- /dev/null
+++ b/third_party/rust/cpufeatures/LICENSE-MIT
@@ -0,0 +1,25 @@
+Copyright (c) 2020 The RustCrypto Project Developers
+
+Permission is hereby granted, free of charge, to any
+person obtaining a copy of this software and associated
+documentation files (the "Software"), to deal in the
+Software without restriction, including without
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+the Software, and to permit persons to whom the Software
+is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice
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+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
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+TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.
diff --git a/third_party/rust/cpufeatures/README.md b/third_party/rust/cpufeatures/README.md
new file mode 100644
index 0000000000..5a5bb40632
--- /dev/null
+++ b/third_party/rust/cpufeatures/README.md
@@ -0,0 +1,90 @@
+# [RustCrypto]: CPU Feature Detection
+
+[![crate][crate-image]][crate-link]
+[![Docs][docs-image]][docs-link]
+![Apache2/MIT licensed][license-image]
+![Rust Version][rustc-image]
+[![Project Chat][chat-image]][chat-link]
+[![Build Status][build-image]][build-link]
+
+Lightweight and efficient runtime CPU feature detection for `aarch64` and
+`x86`/`x86_64` targets.
+
+Supports `no_std` as well as mobile targets including iOS and Android,
+providing an alternative to the `std`-dependent `is_x86_feature_detected!`
+macro.
+
+[Documentation][docs-link]
+
+## Supported architectures
+
+### `aarch64`: Android, iOS, Linux, and macOS/M4 only
+
+Note: ARM64 does not support OS-independent feature detection, so support must
+be implemented on an OS-by-OS basis.
+
+Target features:
+
+- `aes`
+- `sha2`
+- `sha3`
+
+Note: please open a GitHub Issue to request support for additional features.
+
+### `x86`/`x86_64`: OS independent and `no_std`-friendly
+
+Target features:
+
+- `adx`
+- `aes`
+- `avx`
+- `avx2`
+- `bmi1`
+- `bmi2`
+- `fma`
+- `mmx`
+- `pclmulqdq`
+- `popcnt`
+- `rdrand`
+- `rdseed`
+- `sgx`
+- `sha`
+- `sse`
+- `sse2`
+- `sse3`
+- `sse4.1`
+- `sse4.2`
+- `ssse3`
+
+## License
+
+Licensed under either of:
+
+ * [Apache License, Version 2.0](http://www.apache.org/licenses/LICENSE-2.0)
+ * [MIT license](http://opensource.org/licenses/MIT)
+
+at your option.
+
+### Contribution
+
+Unless you explicitly state otherwise, any contribution intentionally submitted
+for inclusion in the work by you, as defined in the Apache-2.0 license, shall be
+dual licensed as above, without any additional terms or conditions.
+
+[//]: # (badges)
+
+[crate-image]: https://img.shields.io/crates/v/cpufeatures.svg
+[crate-link]: https://crates.io/crates/cpufeatures
+[docs-image]: https://docs.rs/cpufeatures/badge.svg
+[docs-link]: https://docs.rs/cpufeatures/
+[license-image]: https://img.shields.io/badge/license-Apache2.0/MIT-blue.svg
+[rustc-image]: https://img.shields.io/badge/rustc-1.40+-blue.svg
+[chat-image]: https://img.shields.io/badge/zulip-join_chat-blue.svg
+[chat-link]: https://rustcrypto.zulipchat.com/#narrow/stream/260052-utils
+[build-image]: https://github.com/RustCrypto/utils/workflows/cpufeatures/badge.svg?branch=master&event=push
+[build-link]: https://github.com/RustCrypto/utils/actions/workflows/cpufeatures.yml
+
+[//]: # (general links)
+
+[RustCrypto]: https://github.com/rustcrypto
+[RustCrypto/utils#378]: https://github.com/RustCrypto/utils/issues/378
diff --git a/third_party/rust/cpufeatures/src/aarch64.rs b/third_party/rust/cpufeatures/src/aarch64.rs
new file mode 100644
index 0000000000..6efdde1af4
--- /dev/null
+++ b/third_party/rust/cpufeatures/src/aarch64.rs
@@ -0,0 +1,182 @@
+//! ARM64 CPU feature detection support.
+//!
+//! Unfortunately ARM instructions to detect CPU features cannot be called from
+//! unprivileged userspace code, so this implementation relies on OS-specific
+//! APIs for feature detection.
+
+// Evaluate the given `$body` expression any of the supplied target features
+// are not enabled. Otherwise returns true.
+#[macro_export]
+#[doc(hidden)]
+macro_rules! __unless_target_features {
+    ($($tf:tt),+ => $body:expr ) => {
+        {
+            #[cfg(not(all($(target_feature=$tf,)*)))]
+            $body
+
+            #[cfg(all($(target_feature=$tf,)*))]
+            true
+        }
+    };
+}
+
+// Linux runtime detection of target CPU features using `getauxval`.
+#[cfg(any(target_os = "linux", target_os = "android"))]
+#[macro_export]
+#[doc(hidden)]
+macro_rules! __detect_target_features {
+    ($($tf:tt),+) => {{
+        let hwcaps = $crate::aarch64::getauxval_hwcap();
+        $($crate::check!(hwcaps, $tf) & )+ true
+    }};
+}
+
+/// Linux helper function for calling `getauxval` to get `AT_HWCAP`.
+#[cfg(any(target_os = "linux", target_os = "android"))]
+pub fn getauxval_hwcap() -> u64 {
+    unsafe { libc::getauxval(libc::AT_HWCAP) }
+}
+
+// MacOS runtime detection of target CPU features using `sysctlbyname`.
+#[cfg(target_os = "macos")]
+#[macro_export]
+#[doc(hidden)]
+macro_rules! __detect_target_features {
+    ($($tf:tt),+) => {{
+        $($crate::check!($tf) & )+ true
+    }};
+}
+
+// Linux `expand_check_macro`
+#[cfg(any(target_os = "linux", target_os = "android"))]
+macro_rules! __expand_check_macro {
+    ($(($name:tt, $hwcap:ident)),* $(,)?) => {
+        #[macro_export]
+        #[doc(hidden)]
+        macro_rules! check {
+            $(
+                ($hwcaps:expr, $name) => {
+                    (($hwcaps & $crate::aarch64::hwcaps::$hwcap) != 0)
+                };
+            )*
+        }
+    };
+}
+
+// Linux `expand_check_macro`
+#[cfg(any(target_os = "linux", target_os = "android"))]
+__expand_check_macro! {
+    ("aes",    AES),    // Enable AES support.
+    ("sha2",   SHA2),   // Enable SHA1 and SHA256 support.
+    ("sha3",   SHA3),   // Enable SHA512 and SHA3 support.
+}
+
+/// Linux hardware capabilities mapped to target features.
+///
+/// Note that LLVM target features are coarser grained than what Linux supports
+/// and imply more capabilities under each feature. This module attempts to
+/// provide that mapping accordingly.
+///
+/// See this issue for more info: <https://github.com/RustCrypto/utils/issues/395>
+#[cfg(any(target_os = "linux", target_os = "android"))]
+pub mod hwcaps {
+    use libc::c_ulong;
+
+    pub const AES: c_ulong = libc::HWCAP_AES | libc::HWCAP_PMULL;
+    pub const SHA2: c_ulong = libc::HWCAP_SHA2;
+    pub const SHA3: c_ulong = libc::HWCAP_SHA3 | libc::HWCAP_SHA512;
+}
+
+// macOS `check!` macro.
+//
+// NOTE: several of these instructions (e.g. `aes`, `sha2`) can be assumed to
+// be present on all Apple ARM64 hardware.
+//
+// Newer CPU instructions now have nodes within sysctl's `hw.optional`
+// namespace, however the ones that do not can safely be assumed to be
+// present on all Apple ARM64 devices, now and for the foreseeable future.
+//
+// See discussion on this issue for more information:
+// <https://github.com/RustCrypto/utils/issues/378>
+#[cfg(target_os = "macos")]
+#[macro_export]
+#[doc(hidden)]
+macro_rules! check {
+    ("aes") => {
+        true
+    };
+    ("sha2") => {
+        true
+    };
+    ("sha3") => {
+        unsafe {
+            // `sha3` target feature implies SHA-512 as well
+            $crate::aarch64::sysctlbyname(b"hw.optional.armv8_2_sha512\0")
+                && $crate::aarch64::sysctlbyname(b"hw.optional.armv8_2_sha3\0")
+        }
+    };
+}
+
+/// macOS helper function for calling `sysctlbyname`.
+#[cfg(target_os = "macos")]
+pub unsafe fn sysctlbyname(name: &[u8]) -> bool {
+    assert_eq!(
+        name.last().cloned(),
+        Some(0),
+        "name is not NUL terminated: {:?}",
+        name
+    );
+
+    let mut value: u32 = 0;
+    let mut size = core::mem::size_of::<u32>();
+
+    let rc = libc::sysctlbyname(
+        name.as_ptr() as *const i8,
+        &mut value as *mut _ as *mut libc::c_void,
+        &mut size,
+        core::ptr::null_mut(),
+        0,
+    );
+
+    assert_eq!(size, 4, "unexpected sysctlbyname(3) result size");
+    assert_eq!(rc, 0, "sysctlbyname returned error code: {}", rc);
+    value != 0
+}
+
+// iOS `check!` macro.
+//
+// Unfortunately iOS does not provide access to the `sysctl(3)` API which means
+// we can only return static values for CPU features which  can be assumed to
+// be present on all Apple ARM64 hardware.
+//
+// See discussion on this issue for more information:
+// <https://github.com/RustCrypto/utils/issues/378>
+#[cfg(target_os = "ios")]
+#[macro_export]
+#[doc(hidden)]
+macro_rules! check {
+    ("aes") => {
+        true
+    };
+    ("sha2") => {
+        true
+    };
+    ("sha3") => {
+        false
+    };
+}
+
+// On other targets, runtime CPU feature detection is unavailable
+#[cfg(not(any(
+    target_os = "ios",
+    target_os = "linux",
+    target_os = "android",
+    target_os = "macos"
+)))]
+#[macro_export]
+#[doc(hidden)]
+macro_rules! __detect_target_features {
+    ($($tf:tt),+) => {
+        false
+    };
+}
diff --git a/third_party/rust/cpufeatures/src/lib.rs b/third_party/rust/cpufeatures/src/lib.rs
new file mode 100644
index 0000000000..b6c7c10b24
--- /dev/null
+++ b/third_party/rust/cpufeatures/src/lib.rs
@@ -0,0 +1,140 @@
+//! This crate provides macros for runtime CPU feature detection. It's intended
+//! as a stopgap until Rust [RFC 2725] adding first-class target feature detection
+//! macros to `libcore` is implemented.
+//!
+//! Supported target architectures:
+//! - `aarch64`: Linux and macOS/M4 only (ARM64 does not support OS-independent feature detection)
+//!   - Target features: `aes`, `sha2`, `sha3`
+//! - `x86`/`x86_64`: OS independent and `no_std`-friendly
+//!   - Target features: `adx`, `aes`, `avx`, `avx2`, `bmi1`, `bmi2`, `fma`,
+//!     `mmx`, `pclmulqdq`, `popcnt`, `rdrand`, `rdseed`, `sgx`, `sha`, `sse`,
+//!     `sse2`, `sse3`, `sse4.1`, `sse4.2`, `ssse3`
+//!
+//! If you would like detection support for a target feature which is not on
+//! this list, please [open a GitHub issue][gh].
+//!
+//! # Example
+//! ```
+//! # #[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
+//! # {
+//! // This macro creates `cpuid_aes_sha` module
+//! cpufeatures::new!(cpuid_aes_sha, "aes", "sha");
+//!
+//! // `token` is a Zero Sized Type (ZST) value, which guarantees
+//! // that underlying static storage got properly initialized,
+//! // which allows to omit initialization branch
+//! let token: cpuid_aes_sha::InitToken = cpuid_aes_sha::init();
+//!
+//! if token.get() {
+//!     println!("CPU supports both SHA and AES extensions");
+//! } else {
+//!     println!("SHA and AES extensions are not supported");
+//! }
+//!
+//! // If stored value needed only once you can get stored value
+//! // omitting the token
+//! let val = cpuid_aes_sha::get();
+//! assert_eq!(val, token.get());
+//!
+//! // Additionally you can get both token and value
+//! let (token, val) = cpuid_aes_sha::init_get();
+//! assert_eq!(val, token.get());
+//! # }
+//! ```
+//!
+//! Note that if all tested target features are enabled via compiler options
+//! (e.g. by using `RUSTFLAGS`), the `get` method will always return `true`
+//! and `init` will not use CPUID instruction. Such behavior allows
+//! compiler to completely eliminate fallback code.
+//!
+//! After first call macro caches result and returns it in subsequent
+//! calls, thus runtime overhead for them is minimal.
+//!
+//! [RFC 2725]: https://github.com/rust-lang/rfcs/pull/2725
+//! [gh]: https://github.com/RustCrypto/utils/issues/new?title=cpufeatures:%20requesting%20support%20for%20CHANGEME%20target%20feature
+
+#![no_std]
+#![doc(
+    html_logo_url = "https://raw.githubusercontent.com/RustCrypto/media/6ee8e381/logo.svg",
+    html_favicon_url = "https://raw.githubusercontent.com/RustCrypto/media/6ee8e381/logo.svg"
+)]
+
+#[cfg(not(miri))]
+#[cfg(all(target_arch = "aarch64"))]
+#[doc(hidden)]
+pub mod aarch64;
+
+#[cfg(not(miri))]
+#[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
+mod x86;
+
+#[cfg(miri)]
+mod miri;
+
+#[cfg(not(any(target_arch = "aarch64", target_arch = "x86", target_arch = "x86_64")))]
+compile_error!("This crate works only on `aarch64`, `x86`, and `x86-64` targets.");
+
+/// Create module with CPU feature detection code.
+#[macro_export]
+macro_rules! new {
+    ($mod_name:ident, $($tf:tt),+ $(,)?) => {
+        mod $mod_name {
+            use core::sync::atomic::{AtomicU8, Ordering::Relaxed};
+
+            const UNINIT: u8 = u8::max_value();
+            static STORAGE: AtomicU8 = AtomicU8::new(UNINIT);
+
+            /// Initialization token
+            #[derive(Copy, Clone, Debug)]
+            pub struct InitToken(());
+
+            impl InitToken {
+                /// Get initialized value
+                #[inline(always)]
+                pub fn get(&self) -> bool {
+                    $crate::__unless_target_features! {
+                        $($tf),+ => {
+                            STORAGE.load(Relaxed) == 1
+                        }
+                    }
+                }
+            }
+
+            /// Initialize underlying storage if needed and get
+            /// stored value and initialization token.
+            #[inline]
+            pub fn init_get() -> (InitToken, bool) {
+                let res = $crate::__unless_target_features! {
+                    $($tf),+ => {
+                        // Relaxed ordering is fine, as we only have a single atomic variable.
+                        let val = STORAGE.load(Relaxed);
+
+                        if val == UNINIT {
+                            let res = $crate::__detect_target_features!($($tf),+);
+                            STORAGE.store(res as u8, Relaxed);
+                            res
+                        } else {
+                            val == 1
+                        }
+                    }
+                };
+
+                (InitToken(()), res)
+            }
+
+            /// Initialize underlying storage if needed and get
+            /// initialization token.
+            #[inline]
+            pub fn init() -> InitToken {
+                init_get().0
+            }
+
+            /// Initialize underlying storage if needed and get
+            /// stored value.
+            #[inline]
+            pub fn get() -> bool {
+                init_get().1
+            }
+        }
+    };
+}
diff --git a/third_party/rust/cpufeatures/src/miri.rs b/third_party/rust/cpufeatures/src/miri.rs
new file mode 100644
index 0000000000..8dff21c13e
--- /dev/null
+++ b/third_party/rust/cpufeatures/src/miri.rs
@@ -0,0 +1,20 @@
+//! Minimal miri support.
+//!
+//! Miri is an interpreter, and though it tries to emulate the target CPU
+//! it does not support any target features.
+
+#[macro_export]
+#[doc(hidden)]
+macro_rules! __unless_target_features {
+    ($($tf:tt),+ => $body:expr ) => {
+        false
+    };
+}
+
+#[macro_export]
+#[doc(hidden)]
+macro_rules! __detect_target_features {
+    ($($tf:tt),+) => {
+        false
+    };
+}
diff --git a/third_party/rust/cpufeatures/src/x86.rs b/third_party/rust/cpufeatures/src/x86.rs
new file mode 100644
index 0000000000..c973b7446b
--- /dev/null
+++ b/third_party/rust/cpufeatures/src/x86.rs
@@ -0,0 +1,105 @@
+//! x86/x86-64 CPU feature detection support.
+//!
+//! Portable, `no_std`-friendly implementation that relies on the x86 `CPUID`
+//! instruction for feature detection.
+
+// Evaluate the given `$body` expression any of the supplied target features
+// are not enabled. Otherwise returns true.
+//
+// The `$body` expression is not evaluated on SGX targets, and returns false
+// on these targets unless *all* supplied target features are enabled.
+#[macro_export]
+#[doc(hidden)]
+macro_rules! __unless_target_features {
+    ($($tf:tt),+ => $body:expr ) => {{
+        #[cfg(not(all($(target_feature=$tf,)*)))]
+        {
+            #[cfg(not(target_env = "sgx"))]
+            $body
+
+            // CPUID is not available on SGX targets
+            #[cfg(target_env = "sgx")]
+            false
+        }
+
+        #[cfg(all($(target_feature=$tf,)*))]
+        true
+    }};
+}
+
+// Use CPUID to detect the presence of all supplied target features.
+#[macro_export]
+#[doc(hidden)]
+macro_rules! __detect_target_features {
+    ($($tf:tt),+) => {{
+        #[cfg(target_arch = "x86")]
+        use core::arch::x86::{__cpuid, __cpuid_count, CpuidResult};
+        #[cfg(target_arch = "x86_64")]
+        use core::arch::x86_64::{__cpuid, __cpuid_count, CpuidResult};
+
+        // These wrappers are workarounds around
+        // https://github.com/rust-lang/rust/issues/101346
+        //
+        // DO NOT remove it until MSRV is bumped to a version
+        // with the issue fix (at least 1.64).
+        #[inline(never)]
+        unsafe fn cpuid(leaf: u32) -> CpuidResult {
+            __cpuid(leaf)
+        }
+
+        #[inline(never)]
+        unsafe fn cpuid_count(leaf: u32, sub_leaf: u32) -> CpuidResult {
+            __cpuid_count(leaf, sub_leaf)
+        }
+
+        let cr = unsafe {
+            [cpuid(1), cpuid_count(7, 0)]
+        };
+
+        $($crate::check!(cr, $tf) & )+ true
+    }};
+}
+
+macro_rules! __expand_check_macro {
+    ($(($name:tt $(, $i:expr, $reg:ident, $offset:expr)*)),* $(,)?) => {
+        #[macro_export]
+        #[doc(hidden)]
+        macro_rules! check {
+            $(
+                ($cr:expr, $name) => {
+                    true
+                    $(
+                        & ($cr[$i].$reg & (1 << $offset) != 0)
+                    )*
+                };
+            )*
+        }
+    };
+}
+
+// Note that according to the [Intel manual][0] AVX2 and FMA require
+// that we check availability of AVX before using them.
+//
+// [0]: https://www.intel.com/content/dam/develop/external/us/en/documents/36945
+__expand_check_macro! {
+    ("mmx", 0, edx, 23),
+    ("sse", 0, edx, 25),
+    ("sse2", 0, edx, 26),
+    ("sse3", 0, ecx, 0),
+    ("pclmulqdq", 0, ecx, 1),
+    ("ssse3", 0, ecx, 9),
+    ("fma", 0, ecx, 28, 0, ecx, 12),
+    ("sse4.1", 0, ecx, 19),
+    ("sse4.2", 0, ecx, 20),
+    ("popcnt", 0, ecx, 23),
+    ("aes", 0, ecx, 25),
+    ("avx", 0, ecx, 28),
+    ("rdrand", 0, ecx, 30),
+    ("sgx", 1, ebx, 2),
+    ("bmi1", 1, ebx, 3),
+    ("avx2", 0, ecx, 28, 1, ebx, 5),
+    ("bmi2", 1, ebx, 8),
+    ("rdseed", 1, ebx, 18),
+    ("adx", 1, ebx, 19),
+    ("sha", 1, ebx, 29),
+}
diff --git a/third_party/rust/cpufeatures/tests/aarch64.rs b/third_party/rust/cpufeatures/tests/aarch64.rs
new file mode 100644
index 0000000000..949669bed0
--- /dev/null
+++ b/third_party/rust/cpufeatures/tests/aarch64.rs
@@ -0,0 +1,17 @@
+//! ARM64 tests
+
+#![cfg(target_arch = "aarch64")]
+
+cpufeatures::new!(armcaps, "aes", "sha2", "sha3");
+
+#[test]
+fn init() {
+    let token: armcaps::InitToken = armcaps::init();
+    assert_eq!(token.get(), armcaps::get());
+}
+
+#[test]
+fn init_get() {
+    let (token, val) = armcaps::init_get();
+    assert_eq!(val, token.get());
+}
diff --git a/third_party/rust/cpufeatures/tests/x86.rs b/third_party/rust/cpufeatures/tests/x86.rs
new file mode 100644
index 0000000000..0d81242389
--- /dev/null
+++ b/third_party/rust/cpufeatures/tests/x86.rs
@@ -0,0 +1,17 @@
+//! x86/x86_64 tests
+
+#![cfg(any(target_arch = "x86", target_arch = "x86_64"))]
+
+cpufeatures::new!(cpuid, "aes", "sha");
+
+#[test]
+fn init() {
+    let token: cpuid::InitToken = cpuid::init();
+    assert_eq!(token.get(), cpuid::get());
+}
+
+#[test]
+fn init_get() {
+    let (token, val) = cpuid::init_get();
+    assert_eq!(val, token.get());
+}