linux-kernel - [PATCH v2 0/2] perf: arm_spe: Fix trace disabling for invalid limits

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Message-Id: <20251110-arm_spe_fix_truncated_flag-v2-0-a629740985cc@arm.com>
Date: Mon, 10 Nov 2025 16:28:30 +0000
From: Leo Yan <leo.yan@....com>
To: Will Deacon <will@...nel.org>, Mark Rutland <mark.rutland@....com>, 
 Alexandru Elisei <alexandru.elisei@....com>, 
 James Clark <james.clark@...aro.org>
Cc: linux-arm-kernel@...ts.infradead.org, linux-perf-users@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Leo Yan <leo.yan@....com>
Subject: [PATCH v2 0/2] perf: arm_spe: Fix trace disabling for invalid
 limits

This series fixes trace disabling issues that occur when failed to
calculate a valid limit (E.g., due to buffer overflow or insufficient
space during padding).

The first patch improves arm_spe_perf_aux_output_begin() for failure
handling, ensuring that all failure cases set the PERF_HES_STOPPED
flag.

The second patch applies the profiling buffer disable flow in the
interrupt handler when the PERF_HES_STOPPED flag has been set.

This series has been verified on Orion6 board.

Signed-off-by: Leo Yan <leo.yan@....com>
---
Changes in v2:
- Added the patch 01.
- Did not rely on irq work for disabling as the disable callback will
  skip operations after PERF_HES_STOPPED flag has been set.
- Link to v1: https://lore.kernel.org/r/20251015-arm_spe_fix_truncated_flag-v1-1-555e328cba05@arm.com

---
Leo Yan (2):
      perf: arm_spe: Correct setting the PERF_HES_STOPPED flag
      perf: arm_spe: Ensure profiling buffer is properly disabled

 drivers/perf/arm_spe_pmu.c | 23 ++++++++++++++++++++---
 1 file changed, 20 insertions(+), 3 deletions(-)
---
base-commit: e9a6fb0bcdd7609be6969112f3fbfcce3b1d4a7c
change-id: 20251015-arm_spe_fix_truncated_flag-1a5b3620a3ab

Best regards,
-- 
Leo Yan <leo.yan@....com>