kernel: support RISC-V PMU

Add RISC-V PMU config symbols and enable them for riscv64.

Signed-off-by: Qingfang Deng <[email protected]>

config/Config-kernel.in

@@ -50,6 +50,15 @@ config KERNEL_ARM_PMU
 	default y if TARGET_armsr_armv8
 	depends on (arm || aarch64)
 
+config KERNEL_RISCV_PMU
+	bool
+	select KERNEL_RISCV_PMU_SBI
+	depends on riscv64
+
+config KERNEL_RISCV_PMU_SBI
+	bool
+	depends on riscv64
+
 config KERNEL_X86_VSYSCALL_EMULATION
 	bool "Enable vsyscall emulation"
 	depends on x86_64
@@ -70,6 +79,7 @@ config KERNEL_X86_VSYSCALL_EMULATION
 config KERNEL_PERF_EVENTS
 	bool "Compile the kernel with performance events and counters"
 	select KERNEL_ARM_PMU if (arm || aarch64)
+	select KERNEL_RISCV_PMU if riscv64
 
 config KERNEL_PROFILING
 	bool "Compile the kernel with profiling enabled"

target/linux/generic/config-6.1

@@ -5304,6 +5304,9 @@ CONFIG_RFKILL=y
 # CONFIG_RING_BUFFER_BENCHMARK is not set
 # CONFIG_RING_BUFFER_STARTUP_TEST is not set
 # CONFIG_RING_BUFFER_VALIDATE_TIME_DELTAS is not set
+# CONFIG_RISCV_PMU is not set
+# CONFIG_RISCV_PMU_LEGACY is not set
+# CONFIG_RISCV_PMU_SBI is not set
 # CONFIG_RMI4_CORE is not set
 # CONFIG_RMNET is not set
 # CONFIG_ROCKCHIP_PHY is not set

target/linux/generic/config-6.6

@@ -5426,6 +5426,9 @@ CONFIG_RFKILL=y
 # CONFIG_RING_BUFFER_BENCHMARK is not set
 # CONFIG_RING_BUFFER_STARTUP_TEST is not set
 # CONFIG_RING_BUFFER_VALIDATE_TIME_DELTAS is not set
+# CONFIG_RISCV_PMU is not set
+# CONFIG_RISCV_PMU_LEGACY is not set
+# CONFIG_RISCV_PMU_SBI is not set
 # CONFIG_RMI4_CORE is not set
 # CONFIG_RMNET is not set
 # CONFIG_ROCKCHIP_ERRATUM_3588001 is not set