1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright(C) 2015 Linaro Limited. All rights reserved. 4 * Author: Mathieu Poirier <mathieu.poirier@linaro.org> 5 */ 6 7 #ifndef _LINUX_CORESIGHT_PMU_H 8 #define _LINUX_CORESIGHT_PMU_H 9 10 #include <linux/bits.h> 11 12 #define CORESIGHT_ETM_PMU_NAME "cs_etm" 13 14 /* 15 * The legacy Trace ID system based on fixed calculation from the cpu 16 * number. This has been replaced by drivers using a dynamic allocation 17 * system - but need to retain the legacy algorithm for backward comparibility 18 * in certain situations:- 19 * a) new perf running on older systems that generate the legacy mapping 20 * b) older tools that may not update at the same time as the kernel. 21 */ 22 #define CORESIGHT_LEGACY_CPU_TRACE_ID(cpu) (0x10 + (cpu * 2)) 23 24 /* 25 * Interpretation of the PERF_RECORD_AUX_OUTPUT_HW_ID payload. 26 * Used to associate a CPU with the CoreSight Trace ID. 27 * [07:00] - Trace ID - uses 8 bits to make value easy to read in file. 28 * [39:08] - Sink ID - as reported in /sys/bus/event_source/devices/cs_etm/sinks/ 29 * Added in minor version 1. 30 * [55:40] - Unused (SBZ) 31 * [59:56] - Minor Version - previously existing fields are compatible with 32 * all minor versions. 33 * [63:60] - Major Version - previously existing fields mean different things 34 * in new major versions. 35 */ 36 #define CS_AUX_HW_ID_TRACE_ID_MASK GENMASK_ULL(7, 0) 37 #define CS_AUX_HW_ID_SINK_ID_MASK GENMASK_ULL(39, 8) 38 39 #define CS_AUX_HW_ID_MINOR_VERSION_MASK GENMASK_ULL(59, 56) 40 #define CS_AUX_HW_ID_MAJOR_VERSION_MASK GENMASK_ULL(63, 60) 41 42 #define CS_AUX_HW_ID_MAJOR_VERSION 0 43 #define CS_AUX_HW_ID_MINOR_VERSION 1 44 45 #endif 46