pvr_gem_obj...ags_validate(9)

🌸 pvr_gem_object_flags_validate(9) 🌸

okay so bestie, welcome to section 9 of the Kernel API Manual — yes we're in the kernel API manual today, we're fancy like that 🎀. The star of this page is pvr_gem_object_flags_validate, and ngl it's one of those little functions that keeps your whole PowerVR GEM world from falling apart. Let's get into it 💅

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✨ NAME ✨

pvr_gem_object_flags_validate — the vibe-check function that verifies a collection of PowerVR GEM mapping and/or creation flags form a valid combination 💖

Like, it literally just looks at your flags and goes "bestie... is this legal?" and tells you yes or no. That's the whole job. Iconic behaviour, no notes.

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✨ SYNOPSIS ✨

bool pvr_gem_object_flags_validate (u64 flags );

She takes a u64 and hands you back a bool. Simple as that. 🦋

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✨ ARGUMENTS ✨

• flags — the PowerVR GEM mapping/creation flags you want validated. This is the one and only thing you pass in, so make it count 🫶

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✨ DESCRIPTION ✨

So here's the tea ☕ — this function explicitly allows kernel-only flags. Yes, kernel-only. On purpose. It's not a bug, it's a feature, she's just built that way 💜

But — and this is the important part, bestie, don't skip it — all ioctl entrypoints should do their own validation as well as relying on this function. Like, this function is not your bodyguard, she's your backup bodyguard. Every ioctl entrypoint needs to validate on its own too. Don't make her carry the whole team, it's giving main character energy in the worst way 😭

fr fr, do your own validation at the ioctl entrypoints. Relying on this alone is not the move 🙈

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✨ RETURN ✨

• true — if flags contains valid mapping and/or creation flags 🎉 (slay, you're good)
• false — otherwise 💀 (nope, try again)

That's it. That's the whole return. Lowkey the cleanest API contract ever ⭐

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✨ SEE ALSO ✨

Kernel file: ./drivers/gpu/drm/imagination/pvr_gem.c — go read her, she's right there 👑

And the whole friend group:

• pvr_gem_object_into_handle(9)
• pvr_gem_object_from_handle(9)
• pvr_gem_object_vmap(9)
• pvr_gem_object_vunmap(9)
• pvr_gem_object_zero(9)
• pvr_gem_create_object(9)
• pvr_gem_object_create(9)
• pvr_gem_get_dma_addr(9)

iykyk 🧚

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aaaand that's the page!! 🍓 brought to you from ./drivers/gpu/drm/imagination in October 2026 — mark your calendars bestie, that's when this girl dropped 💖✨🌈