Linux Kernel to Grant Limited Non-Root Access to Intel Speed Select Tool
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A important update to the intel-speed-select tool, residing within the Linux kernel, will soon allow users without root privileges to access certain functionalities, marking a step toward greater system accessibility. The change, submitted as a pull request to the x86 platform driver maintainers ahead of the Linux 6.20-7.0 kernel cycle, focuses on enabling read-only access for non-root users.
The primary benefit of this update lies in increased convenience for users who wish to monitor system performance without requiring administrative rights. Previously, the tool would promptly halt execution upon detecting a non-root user. Now,the intel-speed-select tool will verify if the current user has permission to open the /dev/isst_interface device. If access is granted, the tool will run, allowing for the execution of read-only commands.
“This change is particularly useful for those wanting to query various attributes via intel-speed-select without having to launch the program as root,” a senior developer explained. While non-root users will remain unable to modify Intel Speed Select Technology (SST) settings, the ability to gather facts without elevated privileges represents a notable improvement.
Understanding Intel Speed Select Technology
Intel Speed Select Technology (SST) is a framework designed to provide enhanced control over clock frequencies and performance behavior within Intel processors. The intel-speed-select tool serves as the interface for interacting with this technology, allowing administrators to fine-tune system performance based on specific workloads. The tool’s location within the Linux kernel source tree underscores its importance as a core component of the operating system’s power management capabilities.
/dev/isst_interface device file. Its existence indicates SST is available on your hardware.
Implications for Linux Users
This update streamlines the process for users interested in monitoring their system’s performance characteristics.Previously, obtaining this information required logging in as root or utilizing sudo, which can be cumbersome and potentially introduce security risks.The new functionality offers a more secure and user-friendly alternative.
The update is expected to be integrated into the next Linux kernel merge window in February, barring any unforeseen complications. This timeline suggests that the enhanced functionality will be available to a wide range of Linux users in the coming months.
This development highlights the ongoing effort to balance system security with user accessibility within the Linux ecosystem. By carefully granting limited privileges, developers are expanding the capabilities of the operating system while maintaining a robust security posture.
Why: The update aims to improve user convenience and security by allowing non-root users to access read-only information from the intel-speed-select tool. Previously, any access required root privileges.
Who: The change was submitted by a senior developer to the x86 platform driver maintainers and will impact Linux users with Intel processors.
What: The update grants non-root users read-only access to the intel-speed-select tool, enabling them to query system performance attributes without needing administrative rights. Modification of SST settings still requires root access.
How did it end?: The update was submitted as a pull request and is expected to be integrated into the Linux kernel merge window in February, making the functionality available to users in the coming months, pending no complications.
