STRUCT DRM_I915_GEM_MEMORY_CLASS_INSTANCE(9)

💅 struct drm_i915_gem_memory_class_instance(9) — Kernel API Manual 🎀

okay so bestie, welcome to the Kernel API Manual glow-up edition ✨ this little struct is the whole vibe, and yes it's from the i915 fam, and yes it's iconic. it's literally just here to identify a particular memory region 🧚 no cap, that's the whole job.

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🌸 NAME 🌸

struct drm_i915_gem_memory_class_instance — identify particular memory region 💖

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✨ SYNOPSIS ✨

she's small, she's tidy, she's giving "two fields and a dream":

struct drm_i915_gem_memory_class_instance {
    __u16 memory_class;
    __u16 memory_instance;
 };

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🦋 Members 🦋

• memory_class — bestie, look at enum drm_i915_gem_memory_class for this one 👀 that's where the answer lives.
• memory_instance — which instance 🎀 literally just: which one.

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🌈 SEE ALSO 🌈

this list is long, like main character energy long, so buckle up 🫶 every single one of these is part of the story:

• Kernel file ./tools/perf/trace/beauty/include/uapi/drm/i915_drm.h
• uevents generated by i915 on its device node(9)
• struct i915_user_extension(9)
• enum drm_i915_gem_engine_class(9)
• struct i915_engine_class_instance(9)
• perf_events exposed by i915 through /sys/bus/event_sources/drivers/i915(9)
• struct drm_i915_getparam(9)
• drm_i915_getparam_t(9)
• struct drm_i915_gem_mmap_offset(9)
• struct drm_i915_gem_set_domain(9)
• struct drm_i915_gem_exec_fence(9)
• struct drm_i915_gem_execbuffer_ext_timeline_fences(9)
• struct drm_i915_gem_execbuffer2(9)
• struct drm_i915_gem_caching(9)
• struct drm_i915_gem_context_create_ext(9)
• struct drm_i915_gem_context_param(9)
• Virtual Engine uAPI(9)
• struct i915_context_engines_parallel_submit(9)
• Context Engine Map uAPI(9)
• struct drm_i915_gem_context_create_ext_setparam(9)
• struct drm_i915_gem_vm_control(9)
• struct drm_i915_gem_userptr(9)
• struct drm_i915_perf_oa_config(9)
• struct drm_i915_query_item(9)
• struct drm_i915_query(9)
• struct drm_i915_query_topology_info(9)
• Engine Discovery uAPI(9)
• struct drm_i915_engine_info(9)
• struct drm_i915_query_engine_info(9)
• struct drm_i915_query_perf_config(9)
• enum drm_i915_gem_memory_class(9)
• struct drm_i915_memory_region_info(9)
• struct drm_i915_query_memory_regions(9)
• struct drm_i915_query_guc_submission_version(9)
• GuC HWCONFIG blob uAPI(9)
• struct drm_i915_gem_create_ext(9)
• struct drm_i915_gem_create_ext_memory_regions(9)
• struct drm_i915_gem_create_ext_protected_content(9)
• struct drm_i915_gem_create_ext_set_pat(9)

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🫶 that's the whole page, bestie. two fields, one memory region, zero drama. go forth and identify it 💅

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and that's a wrap, mwah 💋 — this came out of ./tools/perf/trace/beauty/incl..., dated October 2026, filed under struct drm_...ass_instance(9). slay, see u next page 🎀✨