PAGE TABLE INDEX UTILITIES (CONSTANTS)(9)

🌸 Page table index utilities 🌸

okay bestie, you're reading the Kernel API Manual page for Page table index utilities — manual name (constants)(9). It's a constants page, and it's lowkey carrying the whole address-space vibe ✨💅.

🎀 PVR_PAGE_TABLE_ADDR_SPACE_SIZE 🎀

This one is the size of the device-virtual address space that can be represented in the page table structure. 🫶

This value is checked at runtime against pvr_device_features.virtual_address_space_bits by pvr_vm_create_context, which will return an error if the feature value does not match this constant. 🚨

🛠️ Future work 🛠️

It should be possible to support other values of pvr_device_features.virtual_address_space_bits, but so far no hardware has been created which advertises an unsupported value. That's the whole "one day, maybe" corner 🌈.

⭐ PVR_PAGE_TABLE_ADDR_BITS ⭐

Number of bits needed to represent any value less than PVR_PAGE_TABLE_ADDR_SPACE_SIZE exactly. Math girlie behavior, fr fr 🧮✨.

🦋 PVR_PAGE_TABLE_ADDR_MASK 🦋

Bitmask of device-virtual addresses which are valid in the page table structure. 🎯

This value is derived from PVR_PAGE_TABLE_ADDR_SPACE_SIZE, so the same notes on that constant apply here. iykyk 💜

👀 SEE ALSO 👀

• Kernel file ./drivers/gpu/drm/imagination/pvr_mmu.h
• Public API (constants)(9)

xoxo, your kernel bestie 💅 — source/version: ./drivers/gpu/drm/imagination, dated October 2026, with the footer label Page table i... (constants)(9). slay and read your headers 🫶🎀