Commit b37042b2 authored by Huacai Chen's avatar Huacai Chen
Browse files

LoongArch: Add perf events support 



The perf events infrastructure of LoongArch is very similar to old MIPS-
based Loongson, so most of the codes are derived from MIPS.

Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
parent 5f1e001b

arch/loongarch/Kconfig

+2 −0
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@@ -97,6 +97,8 @@ config LOONGARCH 
	select HAVE_NMI

	select HAVE_PCI

	select HAVE_PERF_EVENTS

	select HAVE_PERF_REGS

	select HAVE_PERF_USER_STACK_DUMP

	select HAVE_REGS_AND_STACK_ACCESS_API

	select HAVE_RSEQ

	select HAVE_SETUP_PER_CPU_AREA if NUMA

arch/loongarch/include/asm/perf_event.h

+3 −1
Original line number Diff line number Diff line
@@ -6,5 +6,7 @@ 


#ifndef __LOONGARCH_PERF_EVENT_H__

#define __LOONGARCH_PERF_EVENT_H__

/* Nothing to show here; the file is required by linux/perf_event.h. */



#define perf_arch_bpf_user_pt_regs(regs) (struct user_pt_regs *)regs



#endif /* __LOONGARCH_PERF_EVENT_H__ */

arch/loongarch/include/uapi/asm/perf_regs.h

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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */

#ifndef _ASM_LOONGARCH_PERF_REGS_H

#define _ASM_LOONGARCH_PERF_REGS_H



enum perf_event_loongarch_regs {

	PERF_REG_LOONGARCH_PC,

	PERF_REG_LOONGARCH_R1,

	PERF_REG_LOONGARCH_R2,

	PERF_REG_LOONGARCH_R3,

	PERF_REG_LOONGARCH_R4,

	PERF_REG_LOONGARCH_R5,

	PERF_REG_LOONGARCH_R6,

	PERF_REG_LOONGARCH_R7,

	PERF_REG_LOONGARCH_R8,

	PERF_REG_LOONGARCH_R9,

	PERF_REG_LOONGARCH_R10,

	PERF_REG_LOONGARCH_R11,

	PERF_REG_LOONGARCH_R12,

	PERF_REG_LOONGARCH_R13,

	PERF_REG_LOONGARCH_R14,

	PERF_REG_LOONGARCH_R15,

	PERF_REG_LOONGARCH_R16,

	PERF_REG_LOONGARCH_R17,

	PERF_REG_LOONGARCH_R18,

	PERF_REG_LOONGARCH_R19,

	PERF_REG_LOONGARCH_R20,

	PERF_REG_LOONGARCH_R21,

	PERF_REG_LOONGARCH_R22,

	PERF_REG_LOONGARCH_R23,

	PERF_REG_LOONGARCH_R24,

	PERF_REG_LOONGARCH_R25,

	PERF_REG_LOONGARCH_R26,

	PERF_REG_LOONGARCH_R27,

	PERF_REG_LOONGARCH_R28,

	PERF_REG_LOONGARCH_R29,

	PERF_REG_LOONGARCH_R30,

	PERF_REG_LOONGARCH_R31,

	PERF_REG_LOONGARCH_MAX,

};

#endif /* _ASM_LOONGARCH_PERF_REGS_H */

arch/loongarch/kernel/Makefile

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@@ -26,4 +26,6 @@ obj-$(CONFIG_NUMA) += numa.o 
obj-$(CONFIG_UNWINDER_GUESS)	+= unwind_guess.o

obj-$(CONFIG_UNWINDER_PROLOGUE) += unwind_prologue.o



obj-$(CONFIG_PERF_EVENTS)	+= perf_event.o perf_regs.o



CPPFLAGS_vmlinux.lds		:= $(KBUILD_CFLAGS)

arch/loongarch/kernel/perf_event.c

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