xe_gt_topolo...ask_last_dss(9)

✨ xe_gt_topology_mask_last_dss(9) ✨

okay bestie, welcome to the Kernel API Manual 💖 this lil page is all about xe_gt_topology_mask_last_dss (yes the header up top gets truncated to xe_gt_topolo...ask_last_dss(9), she's just like that, section 9 and everything 🎀). grab a strawberry drink 🍓 and let's get into it, it's genuinely short and slay.

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💅 NAME

xe_gt_topology_mask_last_dss — literally returns the index of the last DSS in a mask. that's it. that's the whole job. no cap. ✨

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🦋 SYNOPSIS

unsigned int xe_gt_topology_mask_last_dss (const xe_dss_mask_t mask );

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🌸 ARGUMENTS

• mask — your input DSS mask. hand it over and she'll look inside 🫶

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⭐ RETURN

the index of the last DSS in the input DSS mask. iconic.

and if the DSS mask is empty? she returns XE_MAX_DSS_FUSE_BITS — that's the fallback value, not a crash, not a drama, just that constant. periodt. 👑

lowkey important: empty mask = XE_MAX_DSS_FUSE_BITS. don't forget it, it's the whole edge case 💀

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🔥 SEE ALSO

the kernel file for this one lives at ./drivers/gpu/drm/xe/xe_gt_topology.h — go look if you want the full lore iykyk 📖

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and that's the page, bestie!! 🧚 source is ./drivers/gpu/drm/xe, dated October 2026, and the page is xe_gt_topolo...ask_last_dss(9) — mwah, bye 💜🌈