perf: RISC-V: Add support for SBI PMU and Sscofpmf

This series improves perf support for RISC-V based system using SBI PMU and Sscofpmf extensions, by adding a new generic RISC-V perf framework along with a pair of drivers: one that usese the new performance-monitoring extensions and one that keeps support for the existing systems that only have the legacy counters. Tested-by: Nikita Shubin <n.shubin@yadro.com> * palmer/riscv-pmu: MAINTAINERS: Add entry for RISC-V PMU drivers Documentation: riscv: Remove the old documentation RISC-V: Add sscofpmf extension support RISC-V: Add perf platform driver based on SBI PMU extension RISC-V: Add RISC-V SBI PMU extension definitions RISC-V: Add a simple platform driver for RISC-V legacy perf RISC-V: Add a perf core library for pmu drivers RISC-V: Add CSR encodings for all HPMCOUNTERS RISC-V: Remove the current perf implementation
2026-10-14 05:55:17 +00:00 · 2022-03-21 16:07:12 -07:00 · 2022-03-21 16:07:12 -07:00 · 6ae1af9ca0
commit 6ae1af9ca0
parent 6b57ac02b4 33363c3365
18 changed files with 1538 additions and 827 deletions
--- a/Documentation/riscv/pmu.rst
+++ b/Documentation/riscv/pmu.rst
--- a/9
+++ b/9
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
--- a/arch/riscv/include/asm/csr.h
+++ b/arch/riscv/include/asm/csr.h
--- a/arch/riscv/include/asm/hwcap.h
+++ b/arch/riscv/include/asm/hwcap.h
--- a/arch/riscv/include/asm/perf_event.h
+++ b/arch/riscv/include/asm/perf_event.h
--- a/arch/riscv/include/asm/sbi.h
+++ b/arch/riscv/include/asm/sbi.h
--- a/arch/riscv/kernel/Makefile
+++ b/arch/riscv/kernel/Makefile
--- a/arch/riscv/kernel/cpu.c
+++ b/arch/riscv/kernel/cpu.c
--- a/arch/riscv/kernel/cpufeature.c
+++ b/arch/riscv/kernel/cpufeature.c
--- a/arch/riscv/kernel/perf_event.c
+++ b/arch/riscv/kernel/perf_event.c
--- a/drivers/perf/Kconfig
+++ b/drivers/perf/Kconfig
--- a/drivers/perf/Makefile
+++ b/drivers/perf/Makefile
--- a/drivers/perf/riscv_pmu.c
+++ b/drivers/perf/riscv_pmu.c
--- a/drivers/perf/riscv_pmu_legacy.c
+++ b/drivers/perf/riscv_pmu_legacy.c
--- a/drivers/perf/riscv_pmu_sbi.c
+++ b/drivers/perf/riscv_pmu_sbi.c
--- a/include/linux/cpuhotplug.h
+++ b/include/linux/cpuhotplug.h
--- a/include/linux/perf/riscv_pmu.h
+++ b/include/linux/perf/riscv_pmu.h