pvr_mmu_flush_exec(9)

📦 version 7.3.1, in nixpkgs unstable

💖 pvr_mmu_flush_exec(9) 💖

okay bestie, welcome to the Kernel API Manual page for pvr_mmu_flush_exec(9) — yes that's the whole title, no she did NOT come to play with the long name, and honestly? iconic.

✨ NAME ✨

pvr_mmu_flush_exec — actually go out there and execute a flush of every MMU cache you've been out here requesting. like, all of them. the ones you asked for earlier. those. 🫶

✨ SYNOPSIS ✨

int pvr_mmu_flush_exec (struct pvr_device *pvr_dev , bool wait );

🌸 ARGUMENTS 🌸

  • pvr_dev — the PowerVR device you're targeting. your main character, literally.
  • wait — if true, do not come back until the flush is fully completed. no sneaking off early, bestie. 💅

🦋 DESCRIPTION 🦋

okay so here's the tea: you must call this function before you submit any new GPU job. the flush finishes up before the jobs get scheduled, so lowkey you can just call it once after a whole series of maps — slay, batch it, be efficient. ✨

but — and this is the part where you pay attention — a single unmap should always be immediately followed by a flush, and you should explicitly wait on it by setting wait. no exceptions, fr fr. 🙈

now for the dramatic part: failing to flush the MMU caches could risk memory corruption. so if the flush fails (which implies the firmware is straight-up not responding, like it's ghosting you 💀), the GPU device gets marked as lost. that's the whole vibe check failed. periodt.

⭐ RETURN ⭐

  • 0 on success when wait is true, or
  • -EIO if the device is unavailable, or
  • any error encountered while submitting the flush command via the KCCB.

🎀 SEE ALSO 🎀

the kernel file in question, chef's kiss:

  • ./drivers/gpu/drm/imagination/pvr_mmu.c

and now the whole friend group — everyone's here, nobody got left out 💜:

⚠️ reminder bestie: never skip the flush after a single unmap. set wait, hold the line, protect the memory. your future self will thank you. 🧚

and that's the page!! brought to you by the lovely humans at ./drivers/gpu/drm/imagination, dated October 2026, in the Kernel API Manual. go forth and flush responsibly 💜✨

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