CIK_SUPPORT (INT)(9)

💖 cik_support (int) 💖

ok so welcome to the Kernel API Manual, bestie 💅 this is the page for the cik_support module parameter, and yes it's an (int), we love a typed parameter.

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🌸 SYNOPSIS 🌸

1 = enabled, 0 = disabled, -1 = default

so the whole personality of this thing is three numbers, and honestly? iconic. let's break it down:

• 1 — enabled ✨
• 0 — disabled 🙈
• -1 — default (the "i'm not touching it, leave me alone" option) 🫶

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🎀 DESCRIPTION 🎀

ok so CIK (Sea Islands) are second generation GCN GPUs, and they're supported by both drivers: radeon (the old one) and amdgpu (the new one). this parameter right here controls whether amdgpu should support CIK. that's it. that's the whole job 💀

by default, CIK dedicated GPUs and APUs are supported by amdgpu. so if you don't touch anything, amdgpu's got them, no cap.

this is only relevant when CONFIG_DRM_AMDGPU_CIK is enabled to build CIK support in amdgpu. like, if that config isn't turned on, this whole parameter is kinda main-character-with-no-scenes, yk? it doesn't get to do anything ✨

also see radeon.cik_support, which should be disabled when amdgpu.cik_support is enabled, and vice versa.

⚠️ ok listen bestie, this is the important bit: one or the other, not both. radeon.cik_support disabled when amdgpu.cik_support is enabled, and vice versa. it's giving "two people can't be the main character of the same film" 💀 pick your driver and commit.

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🔥 SEE ALSO 🔥

first up, the kernel file lives at ./drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c — that's where all these parameters are hanging out, iykyk 🌈

and now the whole friend group. literally every single one, no skips, we're not doing that to them:

• vramlimit (int)(9)
• vis_vramlimit (int)(9)
• gartsize (uint)(9)
• gttsize (int)(9)
• moverate (int)(9)
• audio (int)(9)
• disp_priority (int)(9)
• hw_i2c (int)(9)
• pcie_gen2 (int)(9)
• msi (int)(9)
• svm_default_granularity (uint)(9)
• lockup_timeout (string)(9)
• dpm (int)(9)
• fw_load_type (int)(9)
• aspm (int)(9)
• runpm (int)(9)
• ip_block_mask (uint)(9)
• bapm (int)(9)
• deep_color (int)(9)
• vm_size (int)(9)
• vm_fragment_size (int)(9)
• vm_block_size (int)(9)
• vm_fault_stop (int)(9)
• vm_update_mode (int)(9)
• exp_hw_support (int)(9)
• dc (int)(9)
• sched_jobs (int)(9)
• sched_hw_submission (int)(9)
• ppfeaturemask (hexint)(9)
• forcelongtraining (uint)(9)
• pcie_gen_cap (uint)(9)
• pcie_lane_cap (uint)(9)
• cg_mask (ullong)(9)
• pg_mask (uint)(9)
• sdma_phase_quantum (uint)(9)
• disable_cu (charp)(9)
• virtual_display (charp)(9)
• lbpw (int)(9)
• gpu_recovery (int)(9)
• emu_mode (int)(9)
• ras_enable (int)(9)
• ras_mask (uint)(9)
• timeout_fatal_disable (bool)(9)
• timeout_period (uint)(9)
• si_support (int)(9)
• smu_memory_pool_size (uint)(9)
• async_gfx_ring (int)(9)
• mcbp (int)(9)
• discovery (int)(9)
• mes_log_enable (int)(9)
• uni_mes (int)(9)
• noretry (int)(9)
• force_asic_type (int)(9)
• use_xgmi_p2p (int)(9)
• sched_policy (int)(9)
• hws_max_conc_proc (int)(9)
• cwsr_enable (int)(9)
• max_num_of_queues_per_device (int)(9)
• send_sigterm (int)(9)
• halt_if_hws_hang (int)(9)
• hws_gws_support(bool)(9)
• queue_preemption_timeout_ms (int)(9)
• debug_evictions(bool)(9)
• no_system_mem_limit(bool)(9)
• no_queue_eviction_on_vm_fault (int)(9)
• mtype_local (int)(9)
• pcie_p2p (bool)(9)
• dcfeaturemask (uint)(9)
• dcdebugmask (uint)(9)
• abmlevel (uint)(9)
• damageclips (int)(9)
• tmz (int)(9)
• freesync_video (uint)(9)
• reset_method (int)(9)
• bad_page_threshold (int) Bad page threshold is specifies the(9)
• vcnfw_log (int)(9)
• sg_display (int)(9)
• umsch_mm (int)(9)
• umsch_mm_fwlog (int)(9)
• smu_pptable_id (int)(9)
• partition_mode (int)(9)
• enforce_isolation (int)(9)
• modeset (int)(9)
• seamless (int)(9)
• debug_mask (uint)(9)
• agp (int)(9)
• wbrf (int)(9)
• rebar (int)(9)
• user_queue (int)(9)
• ptl (int)(9)

💀 real talk: that bad_page_threshold (int) Bad page threshold is specifies the(9) entry is written exactly like that — all lowercase chaos, grammar doing a little tumble, the whole thing. we do not fix, we do not flatten. we present. 🌸

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and that's the whole page, bestie! source/version business for the record: this lives under ./drivers/gpu/drm/amd/amdgpu and it's stamped October 2026. go forth and only enable ONE of the two cik_support knobs, mwah 💋🫶✨