linux-kernel - [PATCH 34/35] perf intel-pt: Use guest pid/tid etc in guest samples

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20220711093218.10967-35-adrian.hunter@intel.com>
Date:   Mon, 11 Jul 2022 12:32:17 +0300
From:   Adrian Hunter <adrian.hunter@...el.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Jiri Olsa <jolsa@...hat.com>, Namhyung Kim <namhyung@...nel.org>,
        Ian Rogers <irogers@...gle.com>,
        Andi Kleen <ak@...ux.intel.com>, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org
Subject: [PATCH 34/35] perf intel-pt: Use guest pid/tid etc in guest samples

When decoding with guest sideband information, for VMX non-root (NR)
i.e. guest events, replace the host (hypervisor) pid/tid with guest values,
and provide also the new machine_pid and vcpu values.

Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
---
 tools/perf/util/intel-pt.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/tools/perf/util/intel-pt.c b/tools/perf/util/intel-pt.c
index 143a096b567b..d5e9fc8106dd 100644
--- a/tools/perf/util/intel-pt.c
+++ b/tools/perf/util/intel-pt.c
@@ -1657,6 +1657,17 @@ static void intel_pt_prep_a_sample(struct intel_pt_queue *ptq,
 
 	sample->pid = ptq->pid;
 	sample->tid = ptq->tid;
+
+	if (ptq->pt->have_guest_sideband) {
+		if ((ptq->state->from_ip && ptq->state->from_nr) ||
+		    (ptq->state->to_ip && ptq->state->to_nr)) {
+			sample->pid = ptq->guest_pid;
+			sample->tid = ptq->guest_tid;
+			sample->machine_pid = ptq->guest_machine_pid;
+			sample->vcpu = ptq->vcpu;
+		}
+	}
+
 	sample->cpu = ptq->cpu;
 	sample->insn_len = ptq->insn_len;
 	memcpy(sample->insn, ptq->insn, INTEL_PT_INSN_BUF_SZ);
-- 
2.25.1