Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-08 05:01:48 +00:00
Code Issues Packages Projects Releases Wiki Activity
c27581ed32
linux/arch/arm/include/asm/perf_event.h

32 lines
840 B
C
Raw Normal View History

ARM: 5900/2: arm: enable support for software perf events The perf events subsystem allows counting of both hardware and software events. This patch implements the bare minimum for software performance events. Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Jamie Iles <jamie.iles@picochip.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-02-02 19:24:58 +00:00
/*
* linux/arch/arm/include/asm/perf_event.h
*
* Copyright (C) 2009 picoChip Designs Ltd, Jamie Iles
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#ifndef __ARM_PERF_EVENT_H__
#define __ARM_PERF_EVENT_H__
ARM: perf: prepare for moving CPU PMU code into separate file The CPU PMU code is tightly coupled with generic ARM PMU handling code. This makes it cumbersome when trying to add support for other ARM PMUs (e.g. interconnect, L2 cache controller, bus) as the generic parts of the code are not readily reusable. This patch cleans up perf_event.c so that reusable code is exposed via header files to other potential PMU drivers. The CPU code is consistently named to identify it as such and also to prepare for moving it into a separate file. Signed-off-by: Will Deacon <will.deacon@arm.com>
2012-07-29 11:36:28 +00:00
/*
* The ARMv7 CPU PMU supports up to 32 event counters.
*/
#define ARMPMU_MAX_HWEVENTS 32
#define HW_OP_UNSUPPORTED 0xFFFF
#define C(_x) PERF_COUNT_HW_CACHE_##_x
#define CACHE_OP_UNSUPPORTED 0xFFFF
ARM: 6069/1: perf-events: use numeric ID to identify PMU The ARM perf-events framework provides support for a number of different PMUs using struct arm_pmu. The char *name field of this struct can be used to identify the PMU, but this is cumbersome if used outside of perf. This patch replaces the name string for a PMU with an enum, which holds a unique ID for the PMU being represented. This ID can be used to index an array of names within perf, so no functionality is lost. The presence of the ID field, allows other kernel subsystems [currently oprofile] to use their own mappings for the PMU name. Cc: Jean Pihet <jpihet@mvista.com> Acked-by: Jamie Iles <jamie.iles@picochip.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-04-30 10:32:44 +00:00
ARM: 7584/1: perf: fix link error when CONFIG_HW_PERF_EVENTS is not selected Commit e50c541 (ARM: perf: add guest vs host discrimination) broken the link as perf_instruction_pointer and perf_misc_flags are not defined when CONFIG_HW_PERF_EVENTS is not selected. As it make little sense to try and profile a guest without any HW event, just fallback to the original code when this config option is not selected. Reported-by: Russell King <linux@arm.linux.org.uk> Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-11-22 12:05:55 +00:00
#ifdef CONFIG_HW_PERF_EVENTS
ARM: perf: add guest vs host discrimination Add minimal guest support to perf, so it can distinguish whether the PMU interrupt was in the host or the guest, as well as collecting some very basic information (guest PC, user vs kernel mode). This is not feature complete though, as it doesn't support backtracing in the guest. Based on the x86 implementation, tested with KVM/ARM. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2012-09-13 15:40:46 +00:00
struct pt_regs;
extern unsigned long perf_instruction_pointer(struct pt_regs *regs);
extern unsigned long perf_misc_flags(struct pt_regs *regs);
#define perf_misc_flags(regs) perf_misc_flags(regs)
ARM: 7584/1: perf: fix link error when CONFIG_HW_PERF_EVENTS is not selected Commit e50c541 (ARM: perf: add guest vs host discrimination) broken the link as perf_instruction_pointer and perf_misc_flags are not defined when CONFIG_HW_PERF_EVENTS is not selected. As it make little sense to try and profile a guest without any HW event, just fallback to the original code when this config option is not selected. Reported-by: Russell King <linux@arm.linux.org.uk> Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-11-22 12:05:55 +00:00
#endif
ARM: perf: add guest vs host discrimination Add minimal guest support to perf, so it can distinguish whether the PMU interrupt was in the host or the guest, as well as collecting some very basic information (guest PC, user vs kernel mode). This is not feature complete though, as it doesn't support backtracing in the guest. Based on the x86 implementation, tested with KVM/ARM. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2012-09-13 15:40:46 +00:00
ARM: 5900/2: arm: enable support for software perf events The perf events subsystem allows counting of both hardware and software events. This patch implements the bare minimum for software performance events. Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Jamie Iles <jamie.iles@picochip.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-02-02 19:24:58 +00:00
#endif /* __ARM_PERF_EVENT_H__ */
Reference in New Issue Copy Permalink