CoreSight

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[PATCH v3 0/2] Update AMBA driver for enhanced component ID spec.

by Mike Leach

The latest ARM CoreSight specification updates the component identification requirements for all components attached to an AMBA bus. (ARM IHI 0029E) This specification defines bits 15:12 in the ComponentID (CID) value as the device class. Identification requirements now depend on this class. Class 0xF: Traditional components identified by Peripheral ID (PID) only. Class 0x9: CoreSight components may be identified by a Universal Component Identifier (UCI) consisting of the PID plus CoreSight DevType and DevArch values. Current and future ARM CoreSight IP will now use the same PID for components on the same function - e.g. the ETM, CTI, PMU and Debug elements associated with a core. The first core to use this UCI method is the A35, which currently has binding entries in the ETMv4 driver. This patchset prepares for the addition of the upcoming CTI driver, which will need to correctly bind with A35 and future hardware, while overcoming the limitation of binding by PID alone, which cannot now work. The patchset updates the current AMBA Identification mechanism, which was already differentiating between 0xF and 0x9 CIDs, to add additional UCI compliant tests for the for the 0x9 device class. Additional UCI structures are provided and added to the ETMv4 driver as appropriate. Changes since v2: Simplification of amba_cs_uci_id_match(). Fix CID class bitfield comments. Dropped RFC tag on patchset. Mike Leach (2): drivers: amba: Updates to component identification for driver matching. coresight: etmv4: Update ID register table to add UCI support drivers/amba/bus.c | 45 +++++++++++++++---- drivers/hwtracing/coresight/coresight-etm4x.c | 18 +++++++- include/linux/amba/bus.h | 32 +++++++++++++ 3 files changed, 86 insertions(+), 9 deletions(-) -- 2.19.1

7 years

[PATCH 59/75] perf cs-etm: Add support for PTMv1.1 decoding

by Arnaldo Carvalho de Melo

From: Mathieu Poirier <mathieu.poirier(a)linaro.org> This patch is re-using the mechanic set forth by ETMv3 to add support for PTM decoding. Configuration for both encoding protocol is similar but the generated stream itself is very different, hence requiring special handling. Signed-off-by: Mathieu Poirier <mathieu.poirier(a)linaro.org> Cc: Alexander Shishkin <alexander.shishkin(a)linux.intel.com> Cc: Jiri Olsa <jolsa(a)redhat.com> Cc: Namhyung Kim <namhyung(a)kernel.org> Cc: Peter Zijlstra <peterz(a)infradead.org> Cc: coresight(a)lists.linaro.org Cc: linux-arm-kernel(a)lists.infradead.org Link: http://lkml.kernel.org/r/1543955944-10042-4-git-send-email-mathieu.poirier@… Signed-off-by: Arnaldo Carvalho de Melo <acme(a)redhat.com> --- .../perf/util/cs-etm-decoder/cs-etm-decoder.c | 10 ++++++-- .../perf/util/cs-etm-decoder/cs-etm-decoder.h | 1 + tools/perf/util/cs-etm.c | 23 +++++++++++++++++-- 3 files changed, 30 insertions(+), 4 deletions(-) diff --git a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c index 952d1f43f3fa..0b4c8629f578 100644 --- a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c +++ b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c @@ -256,8 +256,11 @@ cs_etm_decoder__create_etm_packet_printer(struct cs_etm_trace_params *t_params, switch (t_params->protocol) { case CS_ETM_PROTO_ETMV3: + case CS_ETM_PROTO_PTM: cs_etm_decoder__gen_etmv3_config(t_params, &config_etmv3); - decoder_name = OCSD_BUILTIN_DCD_ETMV3; + decoder_name = (t_params->protocol == CS_ETM_PROTO_ETMV3) ? + OCSD_BUILTIN_DCD_ETMV3 : + OCSD_BUILTIN_DCD_PTM; trace_config = &config_etmv3; break; case CS_ETM_PROTO_ETMV4i: @@ -453,8 +456,11 @@ static int cs_etm_decoder__create_etm_packet_decoder( switch (t_params->protocol) { case CS_ETM_PROTO_ETMV3: + case CS_ETM_PROTO_PTM: cs_etm_decoder__gen_etmv3_config(t_params, &config_etmv3); - decoder_name = OCSD_BUILTIN_DCD_ETMV3; + decoder_name = (t_params->protocol == CS_ETM_PROTO_ETMV3) ? + OCSD_BUILTIN_DCD_ETMV3 : + OCSD_BUILTIN_DCD_PTM; trace_config = &config_etmv3; break; case CS_ETM_PROTO_ETMV4i: diff --git a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.h b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.h index 6b5525410a43..b295dd2b8292 100644 --- a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.h +++ b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.h @@ -96,6 +96,7 @@ enum { CS_ETM_PROTO_ETMV3 = 1, CS_ETM_PROTO_ETMV4i, CS_ETM_PROTO_ETMV4d, + CS_ETM_PROTO_PTM, }; enum { diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c index 76e509c32a28..23159c33db2a 100644 --- a/tools/perf/util/cs-etm.c +++ b/tools/perf/util/cs-etm.c @@ -83,6 +83,19 @@ static int cs_etm__update_queues(struct cs_etm_auxtrace *etm); static int cs_etm__process_timeless_queues(struct cs_etm_auxtrace *etm, pid_t tid, u64 time_); +/* PTMs ETMIDR [11:8] set to b0011 */ +#define ETMIDR_PTM_VERSION 0x00000300 + +static u32 cs_etm__get_v7_protocol_version(u32 etmidr) +{ + etmidr &= ETMIDR_PTM_VERSION; + + if (etmidr == ETMIDR_PTM_VERSION) + return CS_ETM_PROTO_PTM; + + return CS_ETM_PROTO_ETMV3; +} + static void cs_etm__packet_dump(const char *pkt_string) { const char *color = PERF_COLOR_BLUE; @@ -115,7 +128,10 @@ static void cs_etm__dump_event(struct cs_etm_auxtrace *etm, t_params = zalloc(sizeof(*t_params) * etm->num_cpu); for (i = 0; i < etm->num_cpu; i++) { if (etm->metadata[i][CS_ETM_MAGIC] == __perf_cs_etmv3_magic) { - t_params[i].protocol = CS_ETM_PROTO_ETMV3; + u32 etmidr = etm->metadata[i][CS_ETM_ETMIDR]; + + t_params[i].protocol = + cs_etm__get_v7_protocol_version(etmidr); t_params[i].etmv3.reg_ctrl = etm->metadata[i][CS_ETM_ETMCR]; t_params[i].etmv3.reg_trc_id = @@ -366,7 +382,10 @@ static struct cs_etm_queue *cs_etm__alloc_queue(struct cs_etm_auxtrace *etm, for (i = 0; i < etm->num_cpu; i++) { if (etm->metadata[i][CS_ETM_MAGIC] == __perf_cs_etmv3_magic) { - t_params[i].protocol = CS_ETM_PROTO_ETMV3; + u32 etmidr = etm->metadata[i][CS_ETM_ETMIDR]; + + t_params[i].protocol = + cs_etm__get_v7_protocol_version(etmidr); t_params[i].etmv3.reg_ctrl = etm->metadata[i][CS_ETM_ETMCR]; t_params[i].etmv3.reg_trc_id = -- 2.19.2

7 years

[PATCH 58/75] perf cs-etm: Add support for ETMv3 trace decoding

by Arnaldo Carvalho de Melo

From: Mathieu Poirier <mathieu.poirier(a)linaro.org> Add support for the creation of packet printer and decoder for the ETMv3 trace architecture. That way traces generated by tracers adhering to that trace protocol can be handled properly by the perf infrastructure. Signed-off-by: Mathieu Poirier <mathieu.poirier(a)linaro.org> Cc: Alexander Shishkin <alexander.shishkin(a)linux.intel.com> Cc: Jiri Olsa <jolsa(a)redhat.com> Cc: Namhyung Kim <namhyung(a)kernel.org> Cc: Peter Zijlstra <peterz(a)infradead.org> Cc: coresight(a)lists.linaro.org Cc: linux-arm-kernel(a)lists.infradead.org Link: http://lkml.kernel.org/r/1543955944-10042-3-git-send-email-mathieu.poirier@… Signed-off-by: Arnaldo Carvalho de Melo <acme(a)redhat.com> --- .../perf/util/cs-etm-decoder/cs-etm-decoder.c | 25 +++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c index 5efb616bd609..952d1f43f3fa 100644 --- a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c +++ b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c @@ -116,6 +116,19 @@ int cs_etm_decoder__get_packet(struct cs_etm_decoder *decoder, return 1; } +static int cs_etm_decoder__gen_etmv3_config(struct cs_etm_trace_params *params, + ocsd_etmv3_cfg *config) +{ + config->reg_idr = params->etmv3.reg_idr; + config->reg_ctrl = params->etmv3.reg_ctrl; + config->reg_ccer = params->etmv3.reg_ccer; + config->reg_trc_id = params->etmv3.reg_trc_id; + config->arch_ver = ARCH_V7; + config->core_prof = profile_CortexA; + + return 0; +} + static void cs_etm_decoder__gen_etmv4_config(struct cs_etm_trace_params *params, ocsd_etmv4_cfg *config) { @@ -237,10 +250,16 @@ cs_etm_decoder__create_etm_packet_printer(struct cs_etm_trace_params *t_params, struct cs_etm_decoder *decoder) { const char *decoder_name; + ocsd_etmv3_cfg config_etmv3; ocsd_etmv4_cfg trace_config_etmv4; void *trace_config; switch (t_params->protocol) { + case CS_ETM_PROTO_ETMV3: + cs_etm_decoder__gen_etmv3_config(t_params, &config_etmv3); + decoder_name = OCSD_BUILTIN_DCD_ETMV3; + trace_config = &config_etmv3; + break; case CS_ETM_PROTO_ETMV4i: cs_etm_decoder__gen_etmv4_config(t_params, &trace_config_etmv4); decoder_name = OCSD_BUILTIN_DCD_ETMV4I; @@ -427,11 +446,17 @@ static int cs_etm_decoder__create_etm_packet_decoder( struct cs_etm_decoder *decoder) { const char *decoder_name; + ocsd_etmv3_cfg config_etmv3; ocsd_etmv4_cfg trace_config_etmv4; void *trace_config; u8 csid; switch (t_params->protocol) { + case CS_ETM_PROTO_ETMV3: + cs_etm_decoder__gen_etmv3_config(t_params, &config_etmv3); + decoder_name = OCSD_BUILTIN_DCD_ETMV3; + trace_config = &config_etmv3; + break; case CS_ETM_PROTO_ETMV4i: cs_etm_decoder__gen_etmv4_config(t_params, &trace_config_etmv4); decoder_name = OCSD_BUILTIN_DCD_ETMV4I; -- 2.19.2

7 years

[PATCH 57/75] perf cs-etm: Add configuration for ETMv3 trace protocol

by Arnaldo Carvalho de Melo

From: Mathieu Poirier <mathieu.poirier(a)linaro.org> This patch deals with the proper initialisation of configuration parameters for the ETMv3 trace protocol in order to properly handle packets generated by tracers following this specification. Signed-off-by: Mathieu Poirier <mathieu.poirier(a)linaro.org> Cc: Alexander Shishkin <alexander.shishkin(a)linux.intel.com> Cc: Jiri Olsa <jolsa(a)redhat.com> Cc: Namhyung Kim <namhyung(a)kernel.org> Cc: Peter Zijlstra <peterz(a)infradead.org> Cc: coresight(a)lists.linaro.org Cc: linux-arm-kernel(a)lists.infradead.org Link: http://lkml.kernel.org/r/1543955944-10042-2-git-send-email-mathieu.poirier@… Signed-off-by: Arnaldo Carvalho de Melo <acme(a)redhat.com> --- .../perf/util/cs-etm-decoder/cs-etm-decoder.h | 8 +++ tools/perf/util/cs-etm.c | 54 ++++++++++++++----- 2 files changed, 48 insertions(+), 14 deletions(-) diff --git a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.h b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.h index 9351bd10d864..6b5525410a43 100644 --- a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.h +++ b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.h @@ -53,6 +53,13 @@ struct cs_etm_queue; typedef u32 (*cs_etm_mem_cb_type)(struct cs_etm_queue *, u64, size_t, u8 *); +struct cs_etmv3_trace_params { + u32 reg_ctrl; + u32 reg_trc_id; + u32 reg_ccer; + u32 reg_idr; +}; + struct cs_etmv4_trace_params { u32 reg_idr0; u32 reg_idr1; @@ -65,6 +72,7 @@ struct cs_etmv4_trace_params { struct cs_etm_trace_params { int protocol; union { + struct cs_etmv3_trace_params etmv3; struct cs_etmv4_trace_params etmv4; }; }; diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c index 48ad217bf0df..76e509c32a28 100644 --- a/tools/perf/util/cs-etm.c +++ b/tools/perf/util/cs-etm.c @@ -114,15 +114,28 @@ static void cs_etm__dump_event(struct cs_etm_auxtrace *etm, /* Use metadata to fill in trace parameters for trace decoder */ t_params = zalloc(sizeof(*t_params) * etm->num_cpu); for (i = 0; i < etm->num_cpu; i++) { - t_params[i].protocol = CS_ETM_PROTO_ETMV4i; - t_params[i].etmv4.reg_idr0 = etm->metadata[i][CS_ETMV4_TRCIDR0]; - t_params[i].etmv4.reg_idr1 = etm->metadata[i][CS_ETMV4_TRCIDR1]; - t_params[i].etmv4.reg_idr2 = etm->metadata[i][CS_ETMV4_TRCIDR2]; - t_params[i].etmv4.reg_idr8 = etm->metadata[i][CS_ETMV4_TRCIDR8]; - t_params[i].etmv4.reg_configr = + if (etm->metadata[i][CS_ETM_MAGIC] == __perf_cs_etmv3_magic) { + t_params[i].protocol = CS_ETM_PROTO_ETMV3; + t_params[i].etmv3.reg_ctrl = + etm->metadata[i][CS_ETM_ETMCR]; + t_params[i].etmv3.reg_trc_id = + etm->metadata[i][CS_ETM_ETMTRACEIDR]; + } else if (etm->metadata[i][CS_ETM_MAGIC] == + __perf_cs_etmv4_magic) { + t_params[i].protocol = CS_ETM_PROTO_ETMV4i; + t_params[i].etmv4.reg_idr0 = + etm->metadata[i][CS_ETMV4_TRCIDR0]; + t_params[i].etmv4.reg_idr1 = + etm->metadata[i][CS_ETMV4_TRCIDR1]; + t_params[i].etmv4.reg_idr2 = + etm->metadata[i][CS_ETMV4_TRCIDR2]; + t_params[i].etmv4.reg_idr8 = + etm->metadata[i][CS_ETMV4_TRCIDR8]; + t_params[i].etmv4.reg_configr = etm->metadata[i][CS_ETMV4_TRCCONFIGR]; - t_params[i].etmv4.reg_traceidr = + t_params[i].etmv4.reg_traceidr = etm->metadata[i][CS_ETMV4_TRCTRACEIDR]; + } } /* Set decoder parameters to simply print the trace packets */ @@ -352,15 +365,28 @@ static struct cs_etm_queue *cs_etm__alloc_queue(struct cs_etm_auxtrace *etm, goto out_free; for (i = 0; i < etm->num_cpu; i++) { - t_params[i].protocol = CS_ETM_PROTO_ETMV4i; - t_params[i].etmv4.reg_idr0 = etm->metadata[i][CS_ETMV4_TRCIDR0]; - t_params[i].etmv4.reg_idr1 = etm->metadata[i][CS_ETMV4_TRCIDR1]; - t_params[i].etmv4.reg_idr2 = etm->metadata[i][CS_ETMV4_TRCIDR2]; - t_params[i].etmv4.reg_idr8 = etm->metadata[i][CS_ETMV4_TRCIDR8]; - t_params[i].etmv4.reg_configr = + if (etm->metadata[i][CS_ETM_MAGIC] == __perf_cs_etmv3_magic) { + t_params[i].protocol = CS_ETM_PROTO_ETMV3; + t_params[i].etmv3.reg_ctrl = + etm->metadata[i][CS_ETM_ETMCR]; + t_params[i].etmv3.reg_trc_id = + etm->metadata[i][CS_ETM_ETMTRACEIDR]; + } else if (etm->metadata[i][CS_ETM_MAGIC] == + __perf_cs_etmv4_magic) { + t_params[i].protocol = CS_ETM_PROTO_ETMV4i; + t_params[i].etmv4.reg_idr0 = + etm->metadata[i][CS_ETMV4_TRCIDR0]; + t_params[i].etmv4.reg_idr1 = + etm->metadata[i][CS_ETMV4_TRCIDR1]; + t_params[i].etmv4.reg_idr2 = + etm->metadata[i][CS_ETMV4_TRCIDR2]; + t_params[i].etmv4.reg_idr8 = + etm->metadata[i][CS_ETMV4_TRCIDR8]; + t_params[i].etmv4.reg_configr = etm->metadata[i][CS_ETMV4_TRCCONFIGR]; - t_params[i].etmv4.reg_traceidr = + t_params[i].etmv4.reg_traceidr = etm->metadata[i][CS_ETMV4_TRCTRACEIDR]; + } } /* Set decoder parameters to simply print the trace packets */ -- 2.19.2

7 years

[PATCH 35/75] perf cs-etm: Support for ARM A32/T32 instruction sets in CoreSight trace

by Arnaldo Carvalho de Melo

From: Robert Walker <robert.walker(a)arm.com> This patch adds support for generating instruction samples from trace of AArch32 programs using the A32 and T32 instruction sets. T32 has variable 2 or 4 byte instruction size, so the conversion between addresses and instruction counts requires extra information from the trace decoder, requiring version 0.10.0 of OpenCSD. A check for the OpenCSD library version has been added to the feature check for OpenCSD. Signed-off-by: Robert Walker <robert.walker(a)arm.com> Reviewed-by: Mathieu Poirier <mathieu.poirier(a)linaro.org> Tested-by: Leo Yan <leo.yan(a)linaro.org> Cc: Alexander Shishkin <alexander.shishkin(a)linux.intel.com> Cc: Jiri Olsa <jolsa(a)redhat.com> Cc: Namhyung Kim <namhyung(a)kernel.org> Cc: Peter Zijlstra <peterz(a)infradead.org> Cc: coresight(a)lists.linaro.org Cc: linux-arm-kernel(a)lists.infradead.org Link: http://lkml.kernel.org/r/1543839526-30348-1-git-send-email-robert.walker@ar… Signed-off-by: Arnaldo Carvalho de Melo <acme(a)redhat.com> --- tools/build/feature/test-libopencsd.c | 8 +++ .../perf/util/cs-etm-decoder/cs-etm-decoder.c | 29 ++++++++ .../perf/util/cs-etm-decoder/cs-etm-decoder.h | 10 +++ tools/perf/util/cs-etm.c | 70 ++++++++----------- 4 files changed, 78 insertions(+), 39 deletions(-) diff --git a/tools/build/feature/test-libopencsd.c b/tools/build/feature/test-libopencsd.c index 5ff1246e6194..d68eb4fb40cc 100644 --- a/tools/build/feature/test-libopencsd.c +++ b/tools/build/feature/test-libopencsd.c @@ -1,6 +1,14 @@ // SPDX-License-Identifier: GPL-2.0 #include <opencsd/c_api/opencsd_c_api.h> +/* + * Check OpenCSD library version is sufficient to provide required features + */ +#define OCSD_MIN_VER ((0 << 16) | (10 << 8) | (0)) +#if !defined(OCSD_VER_NUM) || (OCSD_VER_NUM < OCSD_MIN_VER) +#error "OpenCSD >= 0.10.0 is required" +#endif + int main(void) { (void)ocsd_get_version(); diff --git a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c index 938def6d0bb9..5efb616bd609 100644 --- a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c +++ b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c @@ -263,9 +263,12 @@ static void cs_etm_decoder__clear_buffer(struct cs_etm_decoder *decoder) decoder->tail = 0; decoder->packet_count = 0; for (i = 0; i < MAX_BUFFER; i++) { + decoder->packet_buffer[i].isa = CS_ETM_ISA_UNKNOWN; decoder->packet_buffer[i].start_addr = CS_ETM_INVAL_ADDR; decoder->packet_buffer[i].end_addr = CS_ETM_INVAL_ADDR; + decoder->packet_buffer[i].instr_count = 0; decoder->packet_buffer[i].last_instr_taken_branch = false; + decoder->packet_buffer[i].last_instr_size = 0; decoder->packet_buffer[i].exc = false; decoder->packet_buffer[i].exc_ret = false; decoder->packet_buffer[i].cpu = INT_MIN; @@ -294,11 +297,15 @@ cs_etm_decoder__buffer_packet(struct cs_etm_decoder *decoder, decoder->packet_count++; decoder->packet_buffer[et].sample_type = sample_type; + decoder->packet_buffer[et].isa = CS_ETM_ISA_UNKNOWN; decoder->packet_buffer[et].exc = false; decoder->packet_buffer[et].exc_ret = false; decoder->packet_buffer[et].cpu = *((int *)inode->priv); decoder->packet_buffer[et].start_addr = CS_ETM_INVAL_ADDR; decoder->packet_buffer[et].end_addr = CS_ETM_INVAL_ADDR; + decoder->packet_buffer[et].instr_count = 0; + decoder->packet_buffer[et].last_instr_taken_branch = false; + decoder->packet_buffer[et].last_instr_size = 0; if (decoder->packet_count == MAX_BUFFER - 1) return OCSD_RESP_WAIT; @@ -321,8 +328,28 @@ cs_etm_decoder__buffer_range(struct cs_etm_decoder *decoder, packet = &decoder->packet_buffer[decoder->tail]; + switch (elem->isa) { + case ocsd_isa_aarch64: + packet->isa = CS_ETM_ISA_A64; + break; + case ocsd_isa_arm: + packet->isa = CS_ETM_ISA_A32; + break; + case ocsd_isa_thumb2: + packet->isa = CS_ETM_ISA_T32; + break; + case ocsd_isa_tee: + case ocsd_isa_jazelle: + case ocsd_isa_custom: + case ocsd_isa_unknown: + default: + packet->isa = CS_ETM_ISA_UNKNOWN; + } + packet->start_addr = elem->st_addr; packet->end_addr = elem->en_addr; + packet->instr_count = elem->num_instr_range; + switch (elem->last_i_type) { case OCSD_INSTR_BR: case OCSD_INSTR_BR_INDIRECT: @@ -336,6 +363,8 @@ cs_etm_decoder__buffer_range(struct cs_etm_decoder *decoder, break; } + packet->last_instr_size = elem->last_instr_sz; + return ret; } diff --git a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.h b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.h index 612b5755f742..9351bd10d864 100644 --- a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.h +++ b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.h @@ -28,11 +28,21 @@ enum cs_etm_sample_type { CS_ETM_TRACE_ON = 1 << 1, }; +enum cs_etm_isa { + CS_ETM_ISA_UNKNOWN, + CS_ETM_ISA_A64, + CS_ETM_ISA_A32, + CS_ETM_ISA_T32, +}; + struct cs_etm_packet { enum cs_etm_sample_type sample_type; + enum cs_etm_isa isa; u64 start_addr; u64 end_addr; + u32 instr_count; u8 last_instr_taken_branch; + u8 last_instr_size; u8 exc; u8 exc_ret; int cpu; diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c index 73430b73570d..48ad217bf0df 100644 --- a/tools/perf/util/cs-etm.c +++ b/tools/perf/util/cs-etm.c @@ -31,14 +31,6 @@ #define MAX_TIMESTAMP (~0ULL) -/* - * A64 instructions are always 4 bytes - * - * Only A64 is supported, so can use this constant for converting between - * addresses and instruction counts, calculting offsets etc - */ -#define A64_INSTR_SIZE 4 - struct cs_etm_auxtrace { struct auxtrace auxtrace; struct auxtrace_queues queues; @@ -510,21 +502,17 @@ static inline void cs_etm__reset_last_branch_rb(struct cs_etm_queue *etmq) etmq->last_branch_rb->nr = 0; } -static inline u64 cs_etm__last_executed_instr(struct cs_etm_packet *packet) -{ - /* Returns 0 for the CS_ETM_TRACE_ON packet */ - if (packet->sample_type == CS_ETM_TRACE_ON) - return 0; +static inline int cs_etm__t32_instr_size(struct cs_etm_queue *etmq, + u64 addr) { + u8 instrBytes[2]; + cs_etm__mem_access(etmq, addr, ARRAY_SIZE(instrBytes), instrBytes); /* - * The packet records the execution range with an exclusive end address - * - * A64 instructions are constant size, so the last executed - * instruction is A64_INSTR_SIZE before the end address - * Will need to do instruction level decode for T32 instructions as - * they can be variable size (not yet supported). + * T32 instruction size is indicated by bits[15:11] of the first + * 16-bit word of the instruction: 0b11101, 0b11110 and 0b11111 + * denote a 32-bit instruction. */ - return packet->end_addr - A64_INSTR_SIZE; + return ((instrBytes[1] & 0xF8) >= 0xE8) ? 4 : 2; } static inline u64 cs_etm__first_executed_instr(struct cs_etm_packet *packet) @@ -536,27 +524,32 @@ static inline u64 cs_etm__first_executed_instr(struct cs_etm_packet *packet) return packet->start_addr; } -static inline u64 cs_etm__instr_count(const struct cs_etm_packet *packet) +static inline +u64 cs_etm__last_executed_instr(const struct cs_etm_packet *packet) { - /* - * Only A64 instructions are currently supported, so can get - * instruction count by dividing. - * Will need to do instruction level decode for T32 instructions as - * they can be variable size (not yet supported). - */ - return (packet->end_addr - packet->start_addr) / A64_INSTR_SIZE; + /* Returns 0 for the CS_ETM_TRACE_ON packet */ + if (packet->sample_type == CS_ETM_TRACE_ON) + return 0; + + return packet->end_addr - packet->last_instr_size; } -static inline u64 cs_etm__instr_addr(const struct cs_etm_packet *packet, +static inline u64 cs_etm__instr_addr(struct cs_etm_queue *etmq, + const struct cs_etm_packet *packet, u64 offset) { - /* - * Only A64 instructions are currently supported, so can get - * instruction address by muliplying. - * Will need to do instruction level decode for T32 instructions as - * they can be variable size (not yet supported). - */ - return packet->start_addr + offset * A64_INSTR_SIZE; + if (packet->isa == CS_ETM_ISA_T32) { + u64 addr = packet->start_addr; + + while (offset > 0) { + addr += cs_etm__t32_instr_size(etmq, addr); + offset--; + } + return addr; + } + + /* Assume a 4 byte instruction size (A32/A64) */ + return packet->start_addr + offset * 4; } static void cs_etm__update_last_branch_rb(struct cs_etm_queue *etmq) @@ -888,9 +881,8 @@ static int cs_etm__sample(struct cs_etm_queue *etmq) struct cs_etm_auxtrace *etm = etmq->etm; struct cs_etm_packet *tmp; int ret; - u64 instrs_executed; + u64 instrs_executed = etmq->packet->instr_count; - instrs_executed = cs_etm__instr_count(etmq->packet); etmq->period_instructions += instrs_executed; /* @@ -920,7 +912,7 @@ static int cs_etm__sample(struct cs_etm_queue *etmq) * executed, but PC has not advanced to next instruction) */ u64 offset = (instrs_executed - instrs_over - 1); - u64 addr = cs_etm__instr_addr(etmq->packet, offset); + u64 addr = cs_etm__instr_addr(etmq, etmq->packet, offset); ret = cs_etm__synth_instruction_sample( etmq, addr, etm->instructions_sample_period); -- 2.19.2

7 years

[PATCH v1 0/5] perf cs-etm: Correct packets handling

by Leo Yan

perf cs-etm module converts decoder elements to packets and then we have more context crossing packets to generate synthenize samples, finally perf tool can faciliate samples for statistics and report the results. This patch series is to address several issues found related with packets handling and samples generation when worked firstly on branch sample flags support for Arm CoreSight trace data, so this patch series also is dependency for another patch series for sample flags. The first two patches are mainly to fix issues in cs_etm__flush(): Patch 0001 corrects packets swapping in cs_etm__flush() and this can fix the wrong branch sample caused by the missed packets swapping; patch 0002 is to fix the wrong samples generation with stale packets at the end of every trace buffer. Patch 0003 is used to support NO_SYNC packet, otherwise the trace decoding cannot reflect the tracing discontinuity caused by NO_SYNC packet. Patch 0004/0005 has been published in the patch series 'perf cs-etm: Add support for sample flags' before but at this time I move them into this patch series due these two patches are more relative with packets handling. Patch 0004 is used to generate branch sample for exception packets; and patch 0005 is to track the exception number. This patch series is applied on the acme's perf core branch [1] with the latest commit f1d23afaf677 ("perf bpf: Reduce the hardcoded .max_entries for pid_maps") and has one prerequisite from Rob's patch 'perf: Support for Arm A32/T32 instruction sets in CoreSight trace' [2]. With applying the dependency patch, this patch series has been tested for branch samples dumping with below command on Juno board: # perf script -F,-time,+ip,+sym,+dso,+addr,+symoff -k vmlinux [1] https://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git/log/?h=perf/… [2] http://archive.armlinux.org.uk/lurker/message/20181109.091126.9d69489d.en.h… Leo Yan (5): perf cs-etm: Correct packets swapping in cs_etm__flush() perf cs-etm: Avoid stale branch samples when flush packet perf cs-etm: Support for NO_SYNC packet perf cs-etm: Generate branch sample for exception packet perf cs-etm: Track exception number tools/perf/util/cs-etm-decoder/cs-etm-decoder.c | 91 ++++++++++++++++++++++--- tools/perf/util/cs-etm-decoder/cs-etm-decoder.h | 11 +-- tools/perf/util/cs-etm.c | 65 +++++++++++++++--- 3 files changed, 146 insertions(+), 21 deletions(-) -- 2.7.4

7 years

[PATCH v2 0/2] perf cs-etm: Add support for sample flags

by Leo Yan

This patch seris adds support for sample flags so can facilitate perf to print sample flags for branch instruction. The patch 0001 is to set branch instruction flags in packet, this patch has the core code in this series to set flags according to the decoding element type, and also based on the elements including instruction type, subtype and condition flag to help making decision to set flags value. The patch 0002 is to support sample flags by copying the flags value from packet structure to sample structure, and it includes three fixing up for TRACE_ON/TRACE_OFF and exception packets. The patch series is based on OpenCSD v0.10.0 and Rob's patch 'perf: Support for Arm A32/T32 instruction sets in CoreSight trace' also is prerequisite to support A32/T32 ISAs. This patch series is applied on the acme's perf core branch [1] with the latest commit f1d23afaf677 ("perf bpf: Reduce the hardcoded .max_entries for pid_maps") and has two prerequisites: 1) It's dependent on Rob's patch 'perf: Support for Arm A32/T32 instruction sets in CoreSight trace' [2]; 2) It's dependent on another patch series 'perf cs-etm: Correct packets handling' [3]. After applying the dependency patches and this patch series, we can verify sample flags with below command: # perf script -F,-time,+flags,+ip,+sym,+dso,+addr,+symoff -k vmlinux Changes from v1: * Moved exception packets handling patches into patch series 'perf cs-etm: Correct packets handling'. * Added sample flags fixing up for TRACE_OFF packet. * Created a new function which is used to maintain flags fixing up. [1] https://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git/log/?h=perf/… [2] http://archive.armlinux.org.uk/lurker/message/20181109.091126.9d69489d.en.h… [3] http://archive.armlinux.org.uk/lurker/message/20181111.045938.782b378b.en.h… Leo Yan (2): perf cs-etm: Set branch instruction flags in packet perf cs-etm: Add support sample flags tools/perf/util/cs-etm-decoder/cs-etm-decoder.c | 168 ++++++++++++++++++++++++ tools/perf/util/cs-etm-decoder/cs-etm-decoder.h | 1 + tools/perf/util/cs-etm.c | 43 +++++- 3 files changed, 210 insertions(+), 2 deletions(-) -- 2.7.4

7 years

[PATCH RESEND 0/3] perf tools: Add support for ETMv3/PTM1.1 decoding

by Mathieu Poirier

Hi Arnaldo, This is a resend of a set previously published in November [1]. It adds support for ETMv3/PTM1.1 trace decoding. The work has been tested on TC2 and ST-Microelectronics' mp157c-ev1 boards. It also applies cleanly to your perf/core branch [2] and does not affect results yielded by "perf test". If it is already in your set of patches to apply, please disregard and delete. Otherwise I would appreciate if you could consider adding to your next branch for the 4.21 cycle. *** Before this set *** $ perf report --stdio # To display the perf.data header info, please use --header/--header-only options. # DCD_ETMV4_0020 : 0x0003 (OCSD_ERR_NOT_INIT) [Component not initialised.]; No decoder configuration information DCD_ETMV4_0022 : 0x0003 (OCSD_ERR_NOT_INIT) [Component not initialised.]; No decoder configuration information DCD_ETMV4_0024 : 0x0003 (OCSD_ERR_NOT_INIT) [Component not initialised.]; No decoder configuration information DCD_ETMV4_0020 : 0x0003 (OCSD_ERR_NOT_INIT) [Component not initialised.]; No decoder configuration information DCD_ETMV4_0022 : 0x0003 (OCSD_ERR_NOT_INIT) [Component not initialised.]; No decoder configuration information DCD_ETMV4_0024 : 0x0003 (OCSD_ERR_NOT_INIT) [Component not initialised.]; No decoder configuration information Warning: AUX data lost 2 times out of 2! Error: The perf.data file has no samples! *** After this set *** $ perf report --stdio [...] # Samples: 12K of event 'branches' # Event count (approx.): 12049 # # Children Self Command Shared Object Symbol # ........ ........ ....... ................ ....................... # 28.18% 28.18% uname libc-2.19.so [.] strcmp 9.13% 9.13% uname libc-2.19.so [.] strcpy 7.87% 7.87% uname libc-2.19.so [.] strnlen 5.58% 5.58% uname libc-2.19.so [.] strlen 2.24% 2.24% uname libc-2.19.so [.] __rawmemchr 1.91% 1.91% uname ld-2.19.so [.] 0x000000000001156a 1.49% 1.49% uname libc-2.19.so [.] __argz_stringify 1.46% 1.46% uname libc-2.19.so [.] malloc 0.96% 0.96% uname libc-2.19.so [.] 0x0000000000054770 0.91% 0.91% uname libc-2.19.so [.] 0x000000000002430a 0.85% 0.85% uname ld-2.19.so [.] 0x0000000000007244 0.83% 0.83% uname libc-2.19.so [.] __stpcpy [...] Regards, Mathieu [1]. https://lkml.org/lkml/2018/11/16/884 [2]. 34434e3633de tools lib traceevent: traceevent API cleanup Mathieu Poirier (3): perf tools: Add configuration for ETMv3 trace protocol perf tools: Add support for ETMv3 trace decoding perf tools: Add support for PTMv1.1 decoding tools/perf/util/cs-etm-decoder/cs-etm-decoder.c | 31 +++++++++++ tools/perf/util/cs-etm-decoder/cs-etm-decoder.h | 9 +++ tools/perf/util/cs-etm.c | 73 ++++++++++++++++++++----- 3 files changed, 99 insertions(+), 14 deletions(-) -- 2.7.4

7 years

[PATCH v5 RESEND] perf: Support for Arm A32/T32 instruction sets in CoreSight trace

by Robert Walker

This patch adds support for generating instruction samples from trace of AArch32 programs using the A32 and T32 instruction sets. T32 has variable 2 or 4 byte instruction size, so the conversion between addresses and instruction counts requires extra information from the trace decoder, requiring version 0.10.0 of OpenCSD. A check for the OpenCSD library version has been added to the feature check for OpenCSD. Signed-off-by: Robert Walker <robert.walker(a)arm.com> --- Hi Arnaldo, Please add this patch to the queue for 4.21 (originally sent as https://lkml.org/lkml/2018/11/9/965) Mathieu has reviewed it: https://lkml.org/lkml/2018/11/9/1432 Thanks Robert Walker Changes since v4: Formatting of comment block tools/build/feature/test-libopencsd.c | 8 +++ tools/perf/util/cs-etm-decoder/cs-etm-decoder.c | 29 ++++++++++ tools/perf/util/cs-etm-decoder/cs-etm-decoder.h | 10 ++++ tools/perf/util/cs-etm.c | 70 +++++++++++-------------- 4 files changed, 78 insertions(+), 39 deletions(-) diff --git a/tools/build/feature/test-libopencsd.c b/tools/build/feature/test-libopencsd.c index 5ff1246..d68eb4f 100644 --- a/tools/build/feature/test-libopencsd.c +++ b/tools/build/feature/test-libopencsd.c @@ -1,6 +1,14 @@ // SPDX-License-Identifier: GPL-2.0 #include <opencsd/c_api/opencsd_c_api.h> +/* + * Check OpenCSD library version is sufficient to provide required features + */ +#define OCSD_MIN_VER ((0 << 16) | (10 << 8) | (0)) +#if !defined(OCSD_VER_NUM) || (OCSD_VER_NUM < OCSD_MIN_VER) +#error "OpenCSD >= 0.10.0 is required" +#endif + int main(void) { (void)ocsd_get_version(); diff --git a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c index 938def6..5efb616 100644 --- a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c +++ b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c @@ -263,9 +263,12 @@ static void cs_etm_decoder__clear_buffer(struct cs_etm_decoder *decoder) decoder->tail = 0; decoder->packet_count = 0; for (i = 0; i < MAX_BUFFER; i++) { + decoder->packet_buffer[i].isa = CS_ETM_ISA_UNKNOWN; decoder->packet_buffer[i].start_addr = CS_ETM_INVAL_ADDR; decoder->packet_buffer[i].end_addr = CS_ETM_INVAL_ADDR; + decoder->packet_buffer[i].instr_count = 0; decoder->packet_buffer[i].last_instr_taken_branch = false; + decoder->packet_buffer[i].last_instr_size = 0; decoder->packet_buffer[i].exc = false; decoder->packet_buffer[i].exc_ret = false; decoder->packet_buffer[i].cpu = INT_MIN; @@ -294,11 +297,15 @@ cs_etm_decoder__buffer_packet(struct cs_etm_decoder *decoder, decoder->packet_count++; decoder->packet_buffer[et].sample_type = sample_type; + decoder->packet_buffer[et].isa = CS_ETM_ISA_UNKNOWN; decoder->packet_buffer[et].exc = false; decoder->packet_buffer[et].exc_ret = false; decoder->packet_buffer[et].cpu = *((int *)inode->priv); decoder->packet_buffer[et].start_addr = CS_ETM_INVAL_ADDR; decoder->packet_buffer[et].end_addr = CS_ETM_INVAL_ADDR; + decoder->packet_buffer[et].instr_count = 0; + decoder->packet_buffer[et].last_instr_taken_branch = false; + decoder->packet_buffer[et].last_instr_size = 0; if (decoder->packet_count == MAX_BUFFER - 1) return OCSD_RESP_WAIT; @@ -321,8 +328,28 @@ cs_etm_decoder__buffer_range(struct cs_etm_decoder *decoder, packet = &decoder->packet_buffer[decoder->tail]; + switch (elem->isa) { + case ocsd_isa_aarch64: + packet->isa = CS_ETM_ISA_A64; + break; + case ocsd_isa_arm: + packet->isa = CS_ETM_ISA_A32; + break; + case ocsd_isa_thumb2: + packet->isa = CS_ETM_ISA_T32; + break; + case ocsd_isa_tee: + case ocsd_isa_jazelle: + case ocsd_isa_custom: + case ocsd_isa_unknown: + default: + packet->isa = CS_ETM_ISA_UNKNOWN; + } + packet->start_addr = elem->st_addr; packet->end_addr = elem->en_addr; + packet->instr_count = elem->num_instr_range; + switch (elem->last_i_type) { case OCSD_INSTR_BR: case OCSD_INSTR_BR_INDIRECT: @@ -336,6 +363,8 @@ cs_etm_decoder__buffer_range(struct cs_etm_decoder *decoder, break; } + packet->last_instr_size = elem->last_instr_sz; + return ret; } diff --git a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.h b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.h index 612b575..9351bd1 100644 --- a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.h +++ b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.h @@ -28,11 +28,21 @@ enum cs_etm_sample_type { CS_ETM_TRACE_ON = 1 << 1, }; +enum cs_etm_isa { + CS_ETM_ISA_UNKNOWN, + CS_ETM_ISA_A64, + CS_ETM_ISA_A32, + CS_ETM_ISA_T32, +}; + struct cs_etm_packet { enum cs_etm_sample_type sample_type; + enum cs_etm_isa isa; u64 start_addr; u64 end_addr; + u32 instr_count; u8 last_instr_taken_branch; + u8 last_instr_size; u8 exc; u8 exc_ret; int cpu; diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c index 73430b7..48ad217 100644 --- a/tools/perf/util/cs-etm.c +++ b/tools/perf/util/cs-etm.c @@ -31,14 +31,6 @@ #define MAX_TIMESTAMP (~0ULL) -/* - * A64 instructions are always 4 bytes - * - * Only A64 is supported, so can use this constant for converting between - * addresses and instruction counts, calculting offsets etc - */ -#define A64_INSTR_SIZE 4 - struct cs_etm_auxtrace { struct auxtrace auxtrace; struct auxtrace_queues queues; @@ -510,21 +502,17 @@ static inline void cs_etm__reset_last_branch_rb(struct cs_etm_queue *etmq) etmq->last_branch_rb->nr = 0; } -static inline u64 cs_etm__last_executed_instr(struct cs_etm_packet *packet) -{ - /* Returns 0 for the CS_ETM_TRACE_ON packet */ - if (packet->sample_type == CS_ETM_TRACE_ON) - return 0; +static inline int cs_etm__t32_instr_size(struct cs_etm_queue *etmq, + u64 addr) { + u8 instrBytes[2]; + cs_etm__mem_access(etmq, addr, ARRAY_SIZE(instrBytes), instrBytes); /* - * The packet records the execution range with an exclusive end address - * - * A64 instructions are constant size, so the last executed - * instruction is A64_INSTR_SIZE before the end address - * Will need to do instruction level decode for T32 instructions as - * they can be variable size (not yet supported). + * T32 instruction size is indicated by bits[15:11] of the first + * 16-bit word of the instruction: 0b11101, 0b11110 and 0b11111 + * denote a 32-bit instruction. */ - return packet->end_addr - A64_INSTR_SIZE; + return ((instrBytes[1] & 0xF8) >= 0xE8) ? 4 : 2; } static inline u64 cs_etm__first_executed_instr(struct cs_etm_packet *packet) @@ -536,27 +524,32 @@ static inline u64 cs_etm__first_executed_instr(struct cs_etm_packet *packet) return packet->start_addr; } -static inline u64 cs_etm__instr_count(const struct cs_etm_packet *packet) +static inline +u64 cs_etm__last_executed_instr(const struct cs_etm_packet *packet) { - /* - * Only A64 instructions are currently supported, so can get - * instruction count by dividing. - * Will need to do instruction level decode for T32 instructions as - * they can be variable size (not yet supported). - */ - return (packet->end_addr - packet->start_addr) / A64_INSTR_SIZE; + /* Returns 0 for the CS_ETM_TRACE_ON packet */ + if (packet->sample_type == CS_ETM_TRACE_ON) + return 0; + + return packet->end_addr - packet->last_instr_size; } -static inline u64 cs_etm__instr_addr(const struct cs_etm_packet *packet, +static inline u64 cs_etm__instr_addr(struct cs_etm_queue *etmq, + const struct cs_etm_packet *packet, u64 offset) { - /* - * Only A64 instructions are currently supported, so can get - * instruction address by muliplying. - * Will need to do instruction level decode for T32 instructions as - * they can be variable size (not yet supported). - */ - return packet->start_addr + offset * A64_INSTR_SIZE; + if (packet->isa == CS_ETM_ISA_T32) { + u64 addr = packet->start_addr; + + while (offset > 0) { + addr += cs_etm__t32_instr_size(etmq, addr); + offset--; + } + return addr; + } + + /* Assume a 4 byte instruction size (A32/A64) */ + return packet->start_addr + offset * 4; } static void cs_etm__update_last_branch_rb(struct cs_etm_queue *etmq) @@ -888,9 +881,8 @@ static int cs_etm__sample(struct cs_etm_queue *etmq) struct cs_etm_auxtrace *etm = etmq->etm; struct cs_etm_packet *tmp; int ret; - u64 instrs_executed; + u64 instrs_executed = etmq->packet->instr_count; - instrs_executed = cs_etm__instr_count(etmq->packet); etmq->period_instructions += instrs_executed; /* @@ -920,7 +912,7 @@ static int cs_etm__sample(struct cs_etm_queue *etmq) * executed, but PC has not advanced to next instruction) */ u64 offset = (instrs_executed - instrs_over - 1); - u64 addr = cs_etm__instr_addr(etmq->packet, offset); + u64 addr = cs_etm__instr_addr(etmq, etmq->packet, offset); ret = cs_etm__synth_instruction_sample( etmq, addr, etm->instructions_sample_period); -- 2.7.4

7 years

[RFC PATCH v2 0/3] Update AMBA driver for enhanced component ID spec

by Mike Leach

The latest ARM CoreSight specification updates the component identification requirements for all components attached to an AMBA bus. (ARM IHI 0029E) This specification defines bits 11:8 in the ComponentID (CID) value as the device class. Identification requirements now depend on this class. Class 0xF: Traditional components identified by Peripheral ID (PID) only. Class 0x9: CoreSight components may be identified by a Universal Component Identifier (UCI) consisting of the PID plus CoreSight DevType and DevArch values. Current and future ARM CoreSight IP will now use the same PID for components on the same function - e.g. the ETM, CTI, PMU and Debug elements associated with a core. The first core to use this UCI method is the A35, which currently has binding entries in the ETMv4 driver. This patchset prepares for the addition of the upcoming CTI driver, which will need to correctly bind with A35 and future hardware, while overcoming the limitation of binding by PID alone, which cannot now work. The patchset updates the current AMBA Identification mechanism, which was already differentiating between 0xF and 0x9 CIDs, to add additional UCI compliant tests for the for the 0x9 device class. Additional UCI structures are provided and added to the ETMv4 driver as appropriate. An additional test patch is provided to test the mechanism on the DB410C 96boards platform. This is not intended to be upstreamed. Changes since v1: 1) simplification of amba_lookup function & other minor fixes per suzuki suggestions. 2) remove spurious whitespace changes. 3) extended devarch and devarch mask values in etmv4 UCI to include architect. Mike Leach (3): drivers: amba: Updates to component identification for driver matching. coresight: etmv4: Update ID register table to add UCI support amba: coresight: Driver test for new CoreSight UCI matching arch/arm64/boot/dts/qcom/msm8916.dtsi | 9 +++ drivers/amba/bus.c | 60 ++++++++++++++++--- drivers/hwtracing/coresight/coresight-etm4x.c | 21 ++++++- include/linux/amba/bus.h | 32 ++++++++++ 4 files changed, 112 insertions(+), 10 deletions(-) -- 2.19.1

7 years

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