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Mathieu Poirier
82500a810e
Set the proper bit in the configuration register when contextID tracing has been requested by user space. That way PE_CONTEXT elements are generated by the tracers when a process is installed on a CPU. Signed-off-by: Mathieu Poirier <[email protected]> Reviewed-by: Suzuki K Poulose <[email protected]> Tested-by: Leo Yan <[email protected]> Tested-by: Robert Walker <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
37 lines
989 B
C
37 lines
989 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright(C) 2015 Linaro Limited. All rights reserved.
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* Author: Mathieu Poirier <[email protected]>
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*/
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#ifndef _LINUX_CORESIGHT_PMU_H
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#define _LINUX_CORESIGHT_PMU_H
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#define CORESIGHT_ETM_PMU_NAME "cs_etm"
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#define CORESIGHT_ETM_PMU_SEED 0x10
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/* ETMv3.5/PTM's ETMCR config bit */
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#define ETM_OPT_CYCACC 12
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#define ETM_OPT_CTXTID 14
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#define ETM_OPT_TS 28
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#define ETM_OPT_RETSTK 29
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/* ETMv4 CONFIGR programming bits for the ETM OPTs */
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#define ETM4_CFG_BIT_CYCACC 4
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#define ETM4_CFG_BIT_CTXTID 6
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#define ETM4_CFG_BIT_TS 11
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#define ETM4_CFG_BIT_RETSTK 12
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static inline int coresight_get_trace_id(int cpu)
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{
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/*
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* A trace ID of value 0 is invalid, so let's start at some
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* random value that fits in 7 bits and go from there. Since
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* the common convention is to have data trace IDs be I(N) + 1,
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* set instruction trace IDs as a function of the CPU number.
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*/
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return (CORESIGHT_ETM_PMU_SEED + (cpu * 2));
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}
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#endif
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