linux-kernel - [PATCH 2/2] perf: arm_spe: Enable CONTEXT packets if profiling in CPU mode

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]

Date:   Thu, 13 Jan 2022 17:54:17 +0000
From:   German Gomez <german.gomez@....com>
To:     linux-eng@....com
Cc:     james.clark@....com, German Gomez <german.gomez@....com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] perf: arm_spe: Enable CONTEXT packets if profiling in CPU mode

Enable CONTEXT packets in SPE traces if the profiler runs in CPU mode.

Signed-off-by: German Gomez <german.gomez@....com>
---
 drivers/perf/arm_spe_pmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/perf/arm_spe_pmu.c b/drivers/perf/arm_spe_pmu.c
index 8515bf85c..7d9a7fa4f 100644
--- a/drivers/perf/arm_spe_pmu.c
+++ b/drivers/perf/arm_spe_pmu.c
@@ -711,7 +711,7 @@ static int arm_spe_pmu_event_init(struct perf_event *event)
 	    !(spe_pmu->features & SPE_PMU_FEAT_FILT_LAT))
 		return -EOPNOTSUPP;
 
-	spe_pmu->pmscr_cx = perfmon_capable();
+	spe_pmu->pmscr_cx = perfmon_capable() || (event->cpu != -1);
 	reg = arm_spe_event_to_pmscr(event);
 	if (!perfmon_capable() &&
 	    (reg & (BIT(SYS_PMSCR_EL1_PA_SHIFT) |
-- 
2.25.1