| commit | 3283fc3f6160baf63bec24fbaa24e094e9ff6daf | [log] [tgz] |
|---|---|---|
| author | Mark Ryan <markdryan@rivosinc.com> | Wed Aug 14 15:24:42 2024 +0200 |
| committer | Joel Sing <joel@sing.id.au> | Fri Aug 23 10:43:34 2024 +0000 |
| tree | 35efa1cca0e5d44e37f50aced60a31020b7e7b69 | |
| parent | 29e55b2fd3f55c5c24c36d1995a5242f1ee34014 [diff] |
cpu: add support for detecting RISC-V extensions Add a RISCV64 variable to cpu that indicates both the presence of RISC-V extensions and performance information about the underlying RISC-V cores. The variable is only populated with non false values on Linux. The detection code first attempts to use the riscv_hwprobe syscall introduced in Linux 6.4, falling back to HWCAP if riscv_hwprobe is not supported. The patch can detect the C, V, Zba, Zbb and Zbs extensions. V, Zba, Zbb and Zbs can only be detected on a 6.5 kernel or later (without backports). Updates golang/go#61416 Change-Id: I40f92724ee3d337c06bdc559ff0b18a8f6bfda9f Reviewed-on: https://go-review.googlesource.com/c/sys/+/605815 Reviewed-by: Cherry Mui <cherryyz@google.com> Reviewed-by: Dmitri Shuralyov <dmitshur@google.com> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Joel Sing <joel@sing.id.au> Reviewed-by: Meng Zhuo <mengzhuo1203@gmail.com>
This repository holds supplemental Go packages for low-level interactions with the operating system.
The easiest way to install is to run go get -u golang.org/x/sys. You can also manually git clone the repository to $GOPATH/src/golang.org/x/sys.
This repository uses Gerrit for code changes. To learn how to submit changes to this repository, see https://golang.org/doc/contribute.html.
The main issue tracker for the sys repository is located at https://github.com/golang/go/issues. Prefix your issue with “x/sys:” in the subject line, so it is easy to find.