95c6fe970a
If packet processing wants to know the packet is bound with which ETM version, it needs to access metadata to decide that based on metadata magic number; but we cannot simply to use CPU logic ID number as index to access metadata sequential array, especially when system have hotplugged off CPUs, the metadata array are only allocated for online CPUs but not offline CPUs, so the CPU logic number doesn't match with its index in the array. This patch is to change tuple from traceID-CPU# to traceID-metadata, thus it can use the tuple to retrieve metadata pointer according to traceID. For safe accessing metadata fields, this patch provides helper function cs_etm__get_cpu() which is used to return CPU number according to traceID; cs_etm_decoder__buffer_packet() is the first consumer for this helper function. Signed-off-by: Leo Yan <leo.yan@linaro.org> Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Leach <mike.leach@linaro.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Robert Walker <robert.walker@arm.com> Cc: Suzuki K Poulouse <suzuki.poulose@arm.com> Cc: coresight ml <coresight@lists.linaro.org> Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/20190129122842.32041-6-leo.yan@linaro.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
89 lines
2.1 KiB
C
89 lines
2.1 KiB
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 <mathieu.poirier@linaro.org>
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*/
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#ifndef INCLUDE__UTIL_PERF_CS_ETM_H__
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#define INCLUDE__UTIL_PERF_CS_ETM_H__
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#include "util/event.h"
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#include "util/session.h"
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/* Versionning header in case things need tro change in the future. That way
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* decoding of old snapshot is still possible.
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*/
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enum {
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/* Starting with 0x0 */
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CS_HEADER_VERSION_0,
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/* PMU->type (32 bit), total # of CPUs (32 bit) */
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CS_PMU_TYPE_CPUS,
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CS_ETM_SNAPSHOT,
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CS_HEADER_VERSION_0_MAX,
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};
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/* Beginning of header common to both ETMv3 and V4 */
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enum {
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CS_ETM_MAGIC,
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CS_ETM_CPU,
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};
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/* ETMv3/PTM metadata */
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enum {
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/* Dynamic, configurable parameters */
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CS_ETM_ETMCR = CS_ETM_CPU + 1,
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CS_ETM_ETMTRACEIDR,
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/* RO, taken from sysFS */
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CS_ETM_ETMCCER,
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CS_ETM_ETMIDR,
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CS_ETM_PRIV_MAX,
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};
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/* ETMv4 metadata */
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enum {
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/* Dynamic, configurable parameters */
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CS_ETMV4_TRCCONFIGR = CS_ETM_CPU + 1,
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CS_ETMV4_TRCTRACEIDR,
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/* RO, taken from sysFS */
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CS_ETMV4_TRCIDR0,
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CS_ETMV4_TRCIDR1,
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CS_ETMV4_TRCIDR2,
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CS_ETMV4_TRCIDR8,
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CS_ETMV4_TRCAUTHSTATUS,
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CS_ETMV4_PRIV_MAX,
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};
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/* RB tree for quick conversion between traceID and metadata pointers */
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struct intlist *traceid_list;
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#define KiB(x) ((x) * 1024)
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#define MiB(x) ((x) * 1024 * 1024)
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#define CS_ETM_HEADER_SIZE (CS_HEADER_VERSION_0_MAX * sizeof(u64))
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static const u64 __perf_cs_etmv3_magic = 0x3030303030303030ULL;
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static const u64 __perf_cs_etmv4_magic = 0x4040404040404040ULL;
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#define CS_ETMV3_PRIV_SIZE (CS_ETM_PRIV_MAX * sizeof(u64))
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#define CS_ETMV4_PRIV_SIZE (CS_ETMV4_PRIV_MAX * sizeof(u64))
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#ifdef HAVE_CSTRACE_SUPPORT
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int cs_etm__process_auxtrace_info(union perf_event *event,
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struct perf_session *session);
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int cs_etm__get_cpu(u8 trace_chan_id, int *cpu);
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#else
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static inline int
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cs_etm__process_auxtrace_info(union perf_event *event __maybe_unused,
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struct perf_session *session __maybe_unused)
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{
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return -1;
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}
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static inline int cs_etm__get_cpu(u8 trace_chan_id __maybe_unused,
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int *cpu __maybe_unused)
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{
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return -1;
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}
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#endif
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#endif
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