The ordering of the checks in the existing code can lead to holding preemption not being considered as privileged op.
Signed-off-by: Lionel Landwerlin <[email protected]> Fixes: 9cd20ef7803c ("drm/i915/perf: allow holding preemption on filtered ctx") --- drivers/gpu/drm/i915/i915_perf.c | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_perf.c b/drivers/gpu/drm/i915/i915_perf.c index a8c2318d3d5e..00317ea19a4a 100644 --- a/drivers/gpu/drm/i915/i915_perf.c +++ b/drivers/gpu/drm/i915/i915_perf.c @@ -3307,15 +3307,6 @@ i915_perf_open_ioctl_locked(struct i915_perf *perf, } } - if (props->hold_preemption) { - if (!props->single_context) { - DRM_DEBUG("preemption disable with no context\n"); - ret = -EINVAL; - goto err; - } - privileged_op = true; - } - /* * On Haswell the OA unit supports clock gating off for a specific * context and in this mode there's no visibility of metrics for the @@ -3335,12 +3326,21 @@ i915_perf_open_ioctl_locked(struct i915_perf *perf, * doesn't request global stream access (i.e. query based sampling * using MI_RECORD_PERF_COUNT. */ - if (IS_HASWELL(perf->i915) && specific_ctx && !props->hold_preemption) + if (IS_HASWELL(perf->i915) && specific_ctx) privileged_op = false; else if (IS_GEN(perf->i915, 12) && specific_ctx && (props->sample_flags & SAMPLE_OA_REPORT) == 0) privileged_op = false; + if (props->hold_preemption) { + if (!props->single_context) { + DRM_DEBUG("preemption disable with no context\n"); + ret = -EINVAL; + goto err; + } + privileged_op = true; + } + /* Similar to perf's kernel.perf_paranoid_cpu sysctl option * we check a dev.i915.perf_stream_paranoid sysctl option * to determine if it's ok to access system wide OA counters -- 2.24.0 _______________________________________________ Intel-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/intel-gfx
