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Date: Mon, 24 Jan 2022 10:41:39 +0200
From: Adrian Hunter <adrian.hunter@...el.com>
To: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: Jiri Olsa <jolsa@...hat.com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Andi Kleen <ak@...ux.intel.com>, linux-kernel@...r.kernel.org
Subject: [PATCH 03/25] perf intel-pt: pkt-decoder: Add CFE and EVD packets
As of Intel SDM (https://www.intel.com/sdm) version 076, there is a new
Intel PT feature called Event Trace which requires 2 new packets CFE and
EVD. Add them to the packet decoder and packet decoder test.
Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
---
.../x86/tests/intel-pt-pkt-decoder-test.c | 8 ++++
.../util/intel-pt-decoder/intel-pt-decoder.c | 32 +++++++++++++++
.../intel-pt-decoder/intel-pt-pkt-decoder.c | 40 +++++++++++++++++++
.../intel-pt-decoder/intel-pt-pkt-decoder.h | 3 ++
4 files changed, 83 insertions(+)
diff --git a/tools/perf/arch/x86/tests/intel-pt-pkt-decoder-test.c b/tools/perf/arch/x86/tests/intel-pt-pkt-decoder-test.c
index 395de4471840..0155215c1d41 100644
--- a/tools/perf/arch/x86/tests/intel-pt-pkt-decoder-test.c
+++ b/tools/perf/arch/x86/tests/intel-pt-pkt-decoder-test.c
@@ -166,6 +166,14 @@ static struct test_data {
{2, {0x02, 0xb3}, INTEL_PT_BLK_4_CTX, {INTEL_PT_BEP_IP, 0, 0}, 0, 0 },
{2, {0x02, 0x33}, INTEL_PT_BLK_8_CTX, {INTEL_PT_BEP, 0, 0}, 0, 0 },
{2, {0x02, 0xb3}, INTEL_PT_BLK_8_CTX, {INTEL_PT_BEP_IP, 0, 0}, 0, 0 },
+ /* Control Flow Event Packet */
+ {4, {0x02, 0x13, 0x01, 0x03}, 0, {INTEL_PT_CFE, 1, 3}, 0, 0 },
+ {4, {0x02, 0x13, 0x81, 0x03}, 0, {INTEL_PT_CFE_IP, 1, 3}, 0, 0 },
+ {4, {0x02, 0x13, 0x1f, 0x00}, 0, {INTEL_PT_CFE, 0x1f, 0}, 0, 0 },
+ {4, {0x02, 0x13, 0x9f, 0xff}, 0, {INTEL_PT_CFE_IP, 0x1f, 0xff}, 0, 0 },
+ /* */
+ {11, {0x02, 0x53, 0x09, 1, 2, 3, 4, 5, 6, 7}, 0, {INTEL_PT_EVD, 0x09, 0x7060504030201}, 0, 0 },
+ {11, {0x02, 0x53, 0x3f, 2, 3, 4, 5, 6, 7, 8}, 0, {INTEL_PT_EVD, 0x3f, 0x8070605040302}, 0, 0 },
/* Terminator */
{0, {0}, 0, {0, 0, 0}, 0, 0 },
};
diff --git a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
index 0e013c2d9eb4..3980ee2080ae 100644
--- a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
+++ b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
@@ -820,6 +820,9 @@ static int intel_pt_calc_cyc_cb(struct intel_pt_pkt_info *pkt_info)
case INTEL_PT_BIP:
case INTEL_PT_BEP:
case INTEL_PT_BEP_IP:
+ case INTEL_PT_CFE:
+ case INTEL_PT_CFE_IP:
+ case INTEL_PT_EVD:
return 0;
case INTEL_PT_MTC:
@@ -1873,6 +1876,9 @@ static int intel_pt_walk_psbend(struct intel_pt_decoder *decoder)
case INTEL_PT_BIP:
case INTEL_PT_BEP:
case INTEL_PT_BEP_IP:
+ case INTEL_PT_CFE:
+ case INTEL_PT_CFE_IP:
+ case INTEL_PT_EVD:
decoder->have_tma = false;
intel_pt_log("ERROR: Unexpected packet\n");
err = -EAGAIN;
@@ -1975,6 +1981,9 @@ static int intel_pt_walk_fup_tip(struct intel_pt_decoder *decoder)
case INTEL_PT_BIP:
case INTEL_PT_BEP:
case INTEL_PT_BEP_IP:
+ case INTEL_PT_CFE:
+ case INTEL_PT_CFE_IP:
+ case INTEL_PT_EVD:
intel_pt_log("ERROR: Missing TIP after FUP\n");
decoder->pkt_state = INTEL_PT_STATE_ERR3;
decoder->pkt_step = 0;
@@ -2134,6 +2143,9 @@ static int intel_pt_vm_psb_lookahead_cb(struct intel_pt_pkt_info *pkt_info)
case INTEL_PT_TIP:
case INTEL_PT_PSB:
case INTEL_PT_TRACESTOP:
+ case INTEL_PT_CFE:
+ case INTEL_PT_CFE_IP:
+ case INTEL_PT_EVD:
default:
return 1;
}
@@ -2653,6 +2665,9 @@ static int intel_pt_vm_time_correlation(struct intel_pt_decoder *decoder)
decoder->blk_type = 0;
break;
+ case INTEL_PT_CFE:
+ case INTEL_PT_CFE_IP:
+ case INTEL_PT_EVD:
case INTEL_PT_MODE_EXEC:
case INTEL_PT_MODE_TSX:
case INTEL_PT_MNT:
@@ -2789,6 +2804,9 @@ static int intel_pt_hop_trace(struct intel_pt_decoder *decoder, bool *no_tip, in
case INTEL_PT_BIP:
case INTEL_PT_BEP:
case INTEL_PT_BEP_IP:
+ case INTEL_PT_CFE:
+ case INTEL_PT_CFE_IP:
+ case INTEL_PT_EVD:
default:
return HOP_PROCESS;
}
@@ -2857,6 +2875,9 @@ static int intel_pt_psb_lookahead_cb(struct intel_pt_pkt_info *pkt_info)
case INTEL_PT_BIP:
case INTEL_PT_BEP:
case INTEL_PT_BEP_IP:
+ case INTEL_PT_CFE:
+ case INTEL_PT_CFE_IP:
+ case INTEL_PT_EVD:
if (data->after_psbend) {
data->after_psbend -= 1;
if (!data->after_psbend)
@@ -3223,6 +3244,11 @@ static int intel_pt_walk_trace(struct intel_pt_decoder *decoder)
}
goto next;
+ case INTEL_PT_CFE:
+ case INTEL_PT_CFE_IP:
+ case INTEL_PT_EVD:
+ break;
+
default:
return intel_pt_bug(decoder);
}
@@ -3265,6 +3291,9 @@ static int intel_pt_walk_psb(struct intel_pt_decoder *decoder)
case INTEL_PT_BIP:
case INTEL_PT_BEP:
case INTEL_PT_BEP_IP:
+ case INTEL_PT_CFE:
+ case INTEL_PT_CFE_IP:
+ case INTEL_PT_EVD:
intel_pt_log("ERROR: Unexpected packet\n");
err = -ENOENT;
goto out;
@@ -3476,6 +3505,9 @@ static int intel_pt_walk_to_ip(struct intel_pt_decoder *decoder)
case INTEL_PT_BIP:
case INTEL_PT_BEP:
case INTEL_PT_BEP_IP:
+ case INTEL_PT_CFE:
+ case INTEL_PT_CFE_IP:
+ case INTEL_PT_EVD:
default:
break;
}
diff --git a/tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.c b/tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.c
index fada96746705..885174964c27 100644
--- a/tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.c
+++ b/tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.c
@@ -64,6 +64,9 @@ static const char * const packet_name[] = {
[INTEL_PT_BIP] = "BIP",
[INTEL_PT_BEP] = "BEP",
[INTEL_PT_BEP_IP] = "BEP",
+ [INTEL_PT_CFE] = "CFE",
+ [INTEL_PT_CFE_IP] = "CFE",
+ [INTEL_PT_EVD] = "EVD",
};
const char *intel_pt_pkt_name(enum intel_pt_pkt_type type)
@@ -328,6 +331,29 @@ static int intel_pt_get_bep_ip(size_t len, struct intel_pt_pkt *packet)
return 2;
}
+static int intel_pt_get_cfe(const unsigned char *buf, size_t len,
+ struct intel_pt_pkt *packet)
+{
+ if (len < 4)
+ return INTEL_PT_NEED_MORE_BYTES;
+ packet->type = buf[2] & 0x80 ? INTEL_PT_CFE_IP : INTEL_PT_CFE;
+ packet->count = buf[2] & 0x1f;
+ packet->payload = buf[3];
+ return 4;
+}
+
+static int intel_pt_get_evd(const unsigned char *buf, size_t len,
+ struct intel_pt_pkt *packet)
+{
+ if (len < 11)
+ return INTEL_PT_NEED_MORE_BYTES;
+ packet->type = INTEL_PT_EVD;
+ packet->count = buf[2] & 0x3f;
+ packet->payload = buf[3];
+ memcpy_le64(&packet->payload, buf + 3, 8);
+ return 11;
+}
+
static int intel_pt_get_ext(const unsigned char *buf, size_t len,
struct intel_pt_pkt *packet)
{
@@ -374,6 +400,10 @@ static int intel_pt_get_ext(const unsigned char *buf, size_t len,
return intel_pt_get_bep(len, packet);
case 0xb3: /* BEP with IP */
return intel_pt_get_bep_ip(len, packet);
+ case 0x13: /* CFE */
+ return intel_pt_get_cfe(buf, len, packet);
+ case 0x53: /* EVD */
+ return intel_pt_get_evd(buf, len, packet);
default:
return INTEL_PT_BAD_PACKET;
}
@@ -623,6 +653,9 @@ void intel_pt_upd_pkt_ctx(const struct intel_pt_pkt *packet,
case INTEL_PT_MWAIT:
case INTEL_PT_BEP:
case INTEL_PT_BEP_IP:
+ case INTEL_PT_CFE:
+ case INTEL_PT_CFE_IP:
+ case INTEL_PT_EVD:
*ctx = INTEL_PT_NO_CTX;
break;
case INTEL_PT_BBP:
@@ -750,6 +783,13 @@ int intel_pt_pkt_desc(const struct intel_pt_pkt *packet, char *buf,
case INTEL_PT_BIP:
return snprintf(buf, buf_len, "%s ID 0x%02x Value 0x%llx",
name, packet->count, payload);
+ case INTEL_PT_CFE:
+ case INTEL_PT_CFE_IP:
+ return snprintf(buf, buf_len, "%s IP:%d Type 0x%02x Vector 0x%llx",
+ name, packet->type == INTEL_PT_CFE_IP, packet->count, payload);
+ case INTEL_PT_EVD:
+ return snprintf(buf, buf_len, "%s Type 0x%02x Payload 0x%llx",
+ name, packet->count, payload);
default:
break;
}
diff --git a/tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.h b/tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.h
index 996090cb84f6..496ba4be875c 100644
--- a/tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.h
+++ b/tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.h
@@ -56,6 +56,9 @@ enum intel_pt_pkt_type {
INTEL_PT_BIP,
INTEL_PT_BEP,
INTEL_PT_BEP_IP,
+ INTEL_PT_CFE,
+ INTEL_PT_CFE_IP,
+ INTEL_PT_EVD,
};
struct intel_pt_pkt {
--
2.25.1
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