CPUID scanning and checking

What is it?

A utility to identify a cpu and features present. It uses the CPUID instruction and on platforms that support it, feature MSRs

What is required to build it?

Rust build tools. How you get them depends on platform.

Centos

The build tools are provided in the distro simply run the following

sudo dnf install cargo rustfmt clippy

Debian/Ubuntu/Pop-OS

The build tools are provided in the distro simply run the following

sudo apt install cargo

Generic Linux/MacOS/Windows

See instructions here They will walk you through installing cargo and any prerequisites.

How is it built?

Simple

cargo build

How can I run it?

Cargo will also run it. If you didn't build it, it will also do that.

cargo run -- --help

Cargo will place the executable depending on if it was built as a release or debug build.

./target/debug/cpuinfo --help ./target/release/cpuinfo --help

What about CI?

This is currently a todo item. Until we set it up, cargo clippy is used to lint the code.

How is code formatted?

Simple rustfmt

cargo fmt

What needs work?

Probably many things ... 2 that come to mind worth mentioning are:

1. CPU Features - The current list was added to make the framework ... work and we need more.
2. Documentation - cargo doc generating a reasonable set from what is there would be nice.

Ideally, this section will grow some github issues or something.

Where can cpu information be found?

The locations of the manuals do change so, no links here as they maybe broken.

1. Intel - look for "Intel® 64 and IA-32 Architectures Software Developer’s Manual"

• "Volume 2" contains the CPUID instruction return information
• "Volume 3" contains the VMX Features
• "Volume 4" contains information on MSRs

2. AMD - "AMD64 Architecture Programmer’s Manual"

• "Volume 3" Appendix D Contains CPUID information