uma/carveout(9)

🦋 uma/carveout 🦋

okay bestie, welcome to the uma/carveout(9) era — she’s a whole kernel API moment, no cap 💅. This file is both readable and writable, because she contains multitudes.

When read, it shows the index of the current setting. Writing a valid index to this file allows users to change the UMA carveout size to the selected option on the next boot. That’s the whole vibe: valid index in, selected option on next boot, periodt ✨.

The available options and their corresponding indices can be read from the uma/carveout_options file. iykyk 🎀.

💖 SEE ALSO 💖

okay this SEE ALSO list is literally a whole friend group, and every single one is invited 🫶:

• Kernel file ./drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
• pcie_replay_count(9)
• board_info(9)
• uma/carveout_options(9)
• amdgpu_device_supports_px(9)
• amdgpu_device_supports_boco(9)
• amdgpu_device_supports_baco(9)
• amdgpu_device_supports_smart_shift(9)
• amdgpu_device_mm_access(9)
• amdgpu_device_aper_access(9)
• amdgpu_device_vram_access(9)
• amdgpu_device_get_rev_id(9)
• amdgpu_device_asic_init(9)
• amdgpu_device_mem_scratch_init(9)
• amdgpu_device_mem_scratch_fini(9)
• amdgpu_device_program_register_sequence(9)
• amdgpu_device_pci_config_reset(9)
• amdgpu_device_pci_reset(9)
• amdgpu_device_resize_fb_bar(9)
• amdgpu_device_need_post(9)
• amdgpu_device_should_use_aspm(9)
• amdgpu_device_vga_set_decode(9)
• amdgpu_device_check_block_size(9)
• amdgpu_device_check_vm_size(9)
• amdgpu_device_check_arguments(9)
• amdgpu_switcheroo_set_state(9)
• amdgpu_switcheroo_can_switch(9)
• amdgpu_device_enable_virtual_display(9)
• amdgpu_device_parse_gpu_info_fw(9)
• amdgpu_device_ip_early_init(9)
• amdgpu_device_ip_init(9)
• amdgpu_device_fill_reset_magic(9)
• amdgpu_device_check_vram_lost(9)
• amdgpu_device_set_cg_state(9)
• amdgpu_device_ip_late_init(9)
• amdgpu_device_smu_fini_early(9)
• amdgpu_device_ip_fini(9)
• amdgpu_device_delayed_init_work_handler(9)
• amdgpu_device_ip_suspend_phase1(9)
• amdgpu_device_ip_suspend_phase2(9)
• amdgpu_device_ip_suspend(9)
• amdgpu_device_ip_resume_phase1(9)
• amdgpu_device_ip_resume_phase2(9)
• amdgpu_device_ip_resume_phase3(9)
• amdgpu_device_ip_resume(9)
• amdgpu_device_detect_sriov_bios(9)
• amdgpu_device_asic_has_dc_support(9)
• amdgpu_device_has_dc_support(9)
• amdgpu_device_check_iommu_direct_map(9)
• amdgpu_device_check_iommu_remap(9)
• amdgpu_device_init(9)
• amdgpu_device_fini_hw(9)
• amdgpu_device_evict_resources(9)
• amdgpu_device_pm_notifier(9)
• amdgpu_device_prepare(9)
• amdgpu_device_complete(9)
• amdgpu_device_suspend(9)
• amdgpu_device_resume(9)
• amdgpu_device_reset_sriov(9)
• amdgpu_device_has_job_running(9)
• amdgpu_device_should_recover_gpu(9)
• amdgpu_device_gpu_recover(9)
• amdgpu_device_partner_bandwidth(9)
• amdgpu_device_gpu_bandwidth(9)
• amdgpu_device_get_pcie_info(9)
• amdgpu_device_is_peer_accessible(9)
• amdgpu_pci_error_detected(9)
• amdgpu_pci_mmio_enabled(9)
• amdgpu_pci_slot_reset(9)
• amdgpu_pci_resume(9)
• amdgpu_device_halt(9)
• amdgpu_device_get_gang(9)
• amdgpu_device_switch_gang(9)
• amdgpu_device_enforce_isolation(9)

mwah 💋 this lil page comes from ./drivers/gpu/drm/amd/amdgpu, dated October 2026, and it’s the uma/carveout(9) manual. bye bestie 🫶✨