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perf intel-pt: pkt-decoder: Add CFE and EVD packets
commit 2750af50a3
upstream.
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.
Committer notes:
I got the "Intel® 64 and IA-32 architectures software developer’s manual
combined volumes: 1, 2A, 2B, 2C, 2D, 3A, 3B, 3C, 3D, and 4" PDF at:
https://cdrdv2.intel.com/v1/dl/getContent/671200
And these new packets are described in page 3951:
<quote>
32.2.4
Event Trace is a capability that exposes details about the asynchronous
events, when they are generated, and when their corresponding software
event handler completes execution. These include:
o Interrupts, including NMI and SMI, including the interrupt vector when
defined.
o Faults, exceptions including the fault vector.
— Page faults additionally include the page fault address, when in context.
o Event handler returns, including IRET and RSM.
o VM exits and VM entries.¹
— VM exits include the values written to the “exit reason” and “exit qualification” VMCS fields.
INIT and SIPI events.
o TSX aborts, including the abort status returned for the RTM instructions.
o Shutdown.
Additionally, it provides indication of the status of the Interrupt Flag
(IF), to indicate when interrupts are masked.
</quote>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: https://lore.kernel.org/r/20220124084201.2699795-4-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Vegard Nossum <vegard.nossum@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
6f9734512d
commit
7cd87b198b
4 changed files with 83 additions and 0 deletions
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@ -166,6 +166,14 @@ struct test_data {
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{2, {0x02, 0xb3}, INTEL_PT_BLK_4_CTX, {INTEL_PT_BEP_IP, 0, 0}, 0, 0 },
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{2, {0x02, 0x33}, INTEL_PT_BLK_8_CTX, {INTEL_PT_BEP, 0, 0}, 0, 0 },
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{2, {0x02, 0xb3}, INTEL_PT_BLK_8_CTX, {INTEL_PT_BEP_IP, 0, 0}, 0, 0 },
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/* Control Flow Event Packet */
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{4, {0x02, 0x13, 0x01, 0x03}, 0, {INTEL_PT_CFE, 1, 3}, 0, 0 },
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{4, {0x02, 0x13, 0x81, 0x03}, 0, {INTEL_PT_CFE_IP, 1, 3}, 0, 0 },
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{4, {0x02, 0x13, 0x1f, 0x00}, 0, {INTEL_PT_CFE, 0x1f, 0}, 0, 0 },
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{4, {0x02, 0x13, 0x9f, 0xff}, 0, {INTEL_PT_CFE_IP, 0x1f, 0xff}, 0, 0 },
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/* */
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{11, {0x02, 0x53, 0x09, 1, 2, 3, 4, 5, 6, 7}, 0, {INTEL_PT_EVD, 0x09, 0x7060504030201}, 0, 0 },
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{11, {0x02, 0x53, 0x3f, 2, 3, 4, 5, 6, 7, 8}, 0, {INTEL_PT_EVD, 0x3f, 0x8070605040302}, 0, 0 },
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/* Terminator */
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{0, {0}, 0, {0, 0, 0}, 0, 0 },
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};
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@ -823,6 +823,9 @@ static int intel_pt_calc_cyc_cb(struct intel_pt_pkt_info *pkt_info)
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case INTEL_PT_BIP:
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case INTEL_PT_BEP:
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case INTEL_PT_BEP_IP:
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case INTEL_PT_CFE:
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case INTEL_PT_CFE_IP:
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case INTEL_PT_EVD:
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return 0;
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case INTEL_PT_MTC:
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@ -1967,6 +1970,9 @@ static int intel_pt_walk_psbend(struct intel_pt_decoder *decoder)
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case INTEL_PT_BIP:
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case INTEL_PT_BEP:
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case INTEL_PT_BEP_IP:
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case INTEL_PT_CFE:
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case INTEL_PT_CFE_IP:
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case INTEL_PT_EVD:
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decoder->have_tma = false;
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intel_pt_log("ERROR: Unexpected packet\n");
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err = -EAGAIN;
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@ -2069,6 +2075,9 @@ static int intel_pt_walk_fup_tip(struct intel_pt_decoder *decoder)
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case INTEL_PT_BIP:
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case INTEL_PT_BEP:
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case INTEL_PT_BEP_IP:
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case INTEL_PT_CFE:
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case INTEL_PT_CFE_IP:
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case INTEL_PT_EVD:
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intel_pt_log("ERROR: Missing TIP after FUP\n");
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decoder->pkt_state = INTEL_PT_STATE_ERR3;
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decoder->pkt_step = 0;
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@ -2228,6 +2237,9 @@ static int intel_pt_vm_psb_lookahead_cb(struct intel_pt_pkt_info *pkt_info)
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case INTEL_PT_TIP:
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case INTEL_PT_PSB:
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case INTEL_PT_TRACESTOP:
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case INTEL_PT_CFE:
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case INTEL_PT_CFE_IP:
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case INTEL_PT_EVD:
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default:
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return 1;
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}
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@ -2747,6 +2759,9 @@ static int intel_pt_vm_time_correlation(struct intel_pt_decoder *decoder)
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decoder->blk_type = 0;
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break;
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case INTEL_PT_CFE:
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case INTEL_PT_CFE_IP:
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case INTEL_PT_EVD:
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case INTEL_PT_MODE_EXEC:
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case INTEL_PT_MODE_TSX:
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case INTEL_PT_MNT:
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@ -2883,6 +2898,9 @@ static int intel_pt_hop_trace(struct intel_pt_decoder *decoder, bool *no_tip, in
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case INTEL_PT_BIP:
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case INTEL_PT_BEP:
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case INTEL_PT_BEP_IP:
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case INTEL_PT_CFE:
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case INTEL_PT_CFE_IP:
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case INTEL_PT_EVD:
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default:
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return HOP_PROCESS;
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}
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@ -2951,6 +2969,9 @@ static int intel_pt_psb_lookahead_cb(struct intel_pt_pkt_info *pkt_info)
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case INTEL_PT_BIP:
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case INTEL_PT_BEP:
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case INTEL_PT_BEP_IP:
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case INTEL_PT_CFE:
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case INTEL_PT_CFE_IP:
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case INTEL_PT_EVD:
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if (data->after_psbend) {
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data->after_psbend -= 1;
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if (!data->after_psbend)
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@ -3317,6 +3338,11 @@ next:
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}
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goto next;
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case INTEL_PT_CFE:
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case INTEL_PT_CFE_IP:
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case INTEL_PT_EVD:
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break;
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default:
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return intel_pt_bug(decoder);
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}
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@ -3359,6 +3385,9 @@ static int intel_pt_walk_psb(struct intel_pt_decoder *decoder)
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case INTEL_PT_BIP:
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case INTEL_PT_BEP:
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case INTEL_PT_BEP_IP:
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case INTEL_PT_CFE:
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case INTEL_PT_CFE_IP:
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case INTEL_PT_EVD:
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intel_pt_log("ERROR: Unexpected packet\n");
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err = -ENOENT;
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goto out;
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@ -3570,6 +3599,9 @@ static int intel_pt_walk_to_ip(struct intel_pt_decoder *decoder)
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case INTEL_PT_BIP:
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case INTEL_PT_BEP:
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case INTEL_PT_BEP_IP:
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case INTEL_PT_CFE:
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case INTEL_PT_CFE_IP:
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case INTEL_PT_EVD:
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default:
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break;
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}
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@ -64,6 +64,9 @@ static const char * const packet_name[] = {
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[INTEL_PT_BIP] = "BIP",
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[INTEL_PT_BEP] = "BEP",
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[INTEL_PT_BEP_IP] = "BEP",
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[INTEL_PT_CFE] = "CFE",
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[INTEL_PT_CFE_IP] = "CFE",
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[INTEL_PT_EVD] = "EVD",
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};
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const char *intel_pt_pkt_name(enum intel_pt_pkt_type type)
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@ -329,6 +332,29 @@ static int intel_pt_get_bep_ip(size_t len, struct intel_pt_pkt *packet)
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return 2;
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}
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static int intel_pt_get_cfe(const unsigned char *buf, size_t len,
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struct intel_pt_pkt *packet)
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{
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if (len < 4)
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return INTEL_PT_NEED_MORE_BYTES;
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packet->type = buf[2] & 0x80 ? INTEL_PT_CFE_IP : INTEL_PT_CFE;
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packet->count = buf[2] & 0x1f;
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packet->payload = buf[3];
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return 4;
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}
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static int intel_pt_get_evd(const unsigned char *buf, size_t len,
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struct intel_pt_pkt *packet)
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{
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if (len < 11)
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return INTEL_PT_NEED_MORE_BYTES;
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packet->type = INTEL_PT_EVD;
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packet->count = buf[2] & 0x3f;
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packet->payload = buf[3];
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memcpy_le64(&packet->payload, buf + 3, 8);
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return 11;
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}
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static int intel_pt_get_ext(const unsigned char *buf, size_t len,
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struct intel_pt_pkt *packet)
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{
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@ -375,6 +401,10 @@ static int intel_pt_get_ext(const unsigned char *buf, size_t len,
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return intel_pt_get_bep(len, packet);
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case 0xb3: /* BEP with IP */
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return intel_pt_get_bep_ip(len, packet);
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case 0x13: /* CFE */
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return intel_pt_get_cfe(buf, len, packet);
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case 0x53: /* EVD */
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return intel_pt_get_evd(buf, len, packet);
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default:
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return INTEL_PT_BAD_PACKET;
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}
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@ -624,6 +654,9 @@ void intel_pt_upd_pkt_ctx(const struct intel_pt_pkt *packet,
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case INTEL_PT_MWAIT:
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case INTEL_PT_BEP:
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case INTEL_PT_BEP_IP:
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case INTEL_PT_CFE:
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case INTEL_PT_CFE_IP:
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case INTEL_PT_EVD:
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*ctx = INTEL_PT_NO_CTX;
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break;
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case INTEL_PT_BBP:
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@ -751,6 +784,13 @@ int intel_pt_pkt_desc(const struct intel_pt_pkt *packet, char *buf,
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case INTEL_PT_BIP:
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return snprintf(buf, buf_len, "%s ID 0x%02x Value 0x%llx",
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name, packet->count, payload);
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case INTEL_PT_CFE:
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case INTEL_PT_CFE_IP:
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return snprintf(buf, buf_len, "%s IP:%d Type 0x%02x Vector 0x%llx",
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name, packet->type == INTEL_PT_CFE_IP, packet->count, payload);
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case INTEL_PT_EVD:
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return snprintf(buf, buf_len, "%s Type 0x%02x Payload 0x%llx",
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name, packet->count, payload);
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default:
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break;
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}
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@ -56,6 +56,9 @@ enum intel_pt_pkt_type {
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INTEL_PT_BIP,
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INTEL_PT_BEP,
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INTEL_PT_BEP_IP,
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INTEL_PT_CFE,
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INTEL_PT_CFE_IP,
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INTEL_PT_EVD,
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};
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struct intel_pt_pkt {
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