i915_perf_enable_locked(9)

💖 i915_perf_enable_locked(9) — Kernel API Manual 💖

okay bestie, welcome to the glow-up of i915_perf_enable_locked(9), straight out of your fave Kernel API Manual ✨ this one's short but she's important, so let's get into it 🫶

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🌸 NAME 🌸

i915_perf_enable_locked — the function that handles the I915_PERF_IOCTL_ENABLE ioctl 💅

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🦋 SYNOPSIS 🦋

void i915_perf_enable_locked (struct i915_perf_stream *stream );

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🎀 ARGUMENTS 🎀

• stream — a disabled i915 perf stream 👀 yeah, she's gotta be off before you turn her on, that's the whole vibe.

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✨ DESCRIPTION ✨

So what does she do? She [re]enables the capture of data for this stream 💖 that's it, that's the function. Lowkey iconic for how simple she is.

⚠️ warning bestie: if a stream was previously enabled, there's currently no intention to provide userspace any guarantee about the preservation of previously buffered data 😭 fr fr, don't count on your old buffered data surviving — that's not a promise this code makes, no cap.

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🌈 SEE ALSO 🌈

the whole friend group, and yes you do need to know all of them 🧚 the kernel file ./drivers/gpu/drm/i915/i915_perf.c is the main character here, plus:

• i915 Perf Overview(9)
• i915 Perf History and Comparison with Core Perf(9)
• OA Tail Pointer Race(9)
• struct perf_open_properties(9)
• oa_buffer_check_unlocked(9)
• append_oa_status(9)
• append_oa_sample(9)
• gen8_append_oa_reports(9)
• gen8_oa_read(9)
• gen7_append_oa_reports(9)
• gen7_oa_read(9)
• i915_oa_wait_unlocked(9)
• i915_oa_poll_wait(9)
• i915_oa_read(9)
• oa_get_render_ctx_id(9)
• oa_put_render_ctx_id(9)
• i915_oa_stream_enable(9)
• i915_oa_stream_disable(9)
• i915_oa_stream_init(9)
• i915_perf_read(9)
• i915_perf_poll_locked(9)
• i915_perf_poll(9)
• i915_perf_disable_locked(9)
• i915_perf_ioctl_locked(9)
• i915_perf_ioctl(9)
• i915_perf_destroy_locked(9)
• i915_perf_release(9)
• i915_perf_open_ioctl_locked(9)
• read_properties_unlocked(9)
• i915_perf_open_ioctl(9)
• i915_perf_register(9)
• i915_perf_unregister(9)
• i915_perf_add_config_ioctl(9)
• i915_perf_remove_config_ioctl(9)
• i915_perf_init(9)
• i915_perf_fini(9)
• i915_perf_ioctl_version(9)

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✨💜 that's the whole page, bestie! 💜✨

and now the cute sign-off 🎀 this one comes from the source ./drivers/gpu/drm/i915, dated October 2026 — go drink some water and go touch some grass, you earned it after reading all those SEE ALSOs 🌸🦋💖