From 1ddc96bd42daeeb58f66c9515e506f245ccb00c6 Mon Sep 17 00:00:00 2001 From: Tiezhu Yang Date: Thu, 4 Feb 2021 11:35:22 +0800 Subject: MIPS: kernel: Support extracting off-line stack traces from user-space with perf Add perf_event_mips_regs/perf_reg_value/perf_reg_validate to support features HAVE_PERF_REGS/HAVE_PERF_USER_STACK_DUMP in kernel. [ayan@wavecomp.com: Repick this patch for unwinding userstack backtrace by perf and libunwind on MIPS based CPU.] [ralf@linux-mips.org: Add perf_get_regs_user() which is required after 'commit 88a7c26af8da ("perf: Move task_pt_regs sampling into arch code")'.] [yangtiezhu@loongson.cn: Fix build error about perf_get_regs_user() after commit 76a4efa80900 ("perf/arch: Remove perf_sample_data::regs_user_copy"), and also separate the original patches into two parts (MIPS kernel and perf tools) to merge easily.] The original patches: https://lore.kernel.org/patchwork/patch/1126521/ https://lore.kernel.org/patchwork/patch/1126520/ Signed-off-by: David Daney Signed-off-by: Ralf Baechle Signed-off-by: Archer Yan Signed-off-by: Tiezhu Yang Signed-off-by: Thomas Bogendoerfer --- arch/mips/include/uapi/asm/perf_regs.h | 40 ++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 arch/mips/include/uapi/asm/perf_regs.h (limited to 'arch/mips/include/uapi') diff --git a/arch/mips/include/uapi/asm/perf_regs.h b/arch/mips/include/uapi/asm/perf_regs.h new file mode 100644 index 000000000000..d0f4ecd616cf --- /dev/null +++ b/arch/mips/include/uapi/asm/perf_regs.h @@ -0,0 +1,40 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ +#ifndef _ASM_MIPS_PERF_REGS_H +#define _ASM_MIPS_PERF_REGS_H + +enum perf_event_mips_regs { + PERF_REG_MIPS_PC, + PERF_REG_MIPS_R1, + PERF_REG_MIPS_R2, + PERF_REG_MIPS_R3, + PERF_REG_MIPS_R4, + PERF_REG_MIPS_R5, + PERF_REG_MIPS_R6, + PERF_REG_MIPS_R7, + PERF_REG_MIPS_R8, + PERF_REG_MIPS_R9, + PERF_REG_MIPS_R10, + PERF_REG_MIPS_R11, + PERF_REG_MIPS_R12, + PERF_REG_MIPS_R13, + PERF_REG_MIPS_R14, + PERF_REG_MIPS_R15, + PERF_REG_MIPS_R16, + PERF_REG_MIPS_R17, + PERF_REG_MIPS_R18, + PERF_REG_MIPS_R19, + PERF_REG_MIPS_R20, + PERF_REG_MIPS_R21, + PERF_REG_MIPS_R22, + PERF_REG_MIPS_R23, + PERF_REG_MIPS_R24, + PERF_REG_MIPS_R25, + PERF_REG_MIPS_R26, + PERF_REG_MIPS_R27, + PERF_REG_MIPS_R28, + PERF_REG_MIPS_R29, + PERF_REG_MIPS_R30, + PERF_REG_MIPS_R31, + PERF_REG_MIPS_MAX = PERF_REG_MIPS_R31 + 1, +}; +#endif /* _ASM_MIPS_PERF_REGS_H */ -- cgit v1.2.3