riscv_zicntr_zihpm

Extension: Zicntr and Zihpm

• Branch: riscv-zicntr-zihpm
• Tracking PR: #102 (view Pull Request and Diff)
• Mailing List:
  • RFC PATCH v1 (2023-08-08)
  • PATCH v1 (2023-10-21)
  • PATCH v2 (2023-10-21)

Feature Description

This patch adds support for two extensions, split from the RISC-V Unprivileged ISA version 2.2:

1. Zicntr
   Basic hardware performance counters
2. Zihpm
   Platform-specific configurable hardware performance counters

but the compatibility is vital. This patch set tries to deal with the compatibility issues as possible.