STRUCT CXL_MEM_REPAIR_ATTRBS(9)

💅 struct cxl_mem_repair_attrbs(9) — the Kernel API Manual, but make it make sense

okay so bestie, welcome to the glow-up of struct cxl_mem_repair_attrbs(9) — that's section 9 of the Kernel API Manual, for the record, iykyk. this is the little struct that holds all the tea about how to repair a chunk of CXL memory, and honestly? it ate. let's get into it ✨

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🌸 NAME 🌸

struct cxl_mem_repair_attrbs — CXL memory repair attributes 💖

like, literally the attributes. for repairing. memory. CXL memory specifically. no cap.

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🎀 SYNOPSIS 🎀

here's the whole struct, verbatim, do not come for me:

struct cxl_mem_repair_attrbs {
    u64 dpa;
    u32 nibble_mask;
    u32 row;
    u16 column;
    u8 channel;
    u8 sub_channel;
    u8 rank;
    u8 bank_group;
    u8 bank;
    enum cxl_mem_repair_type repair_type;
 };

look at those types bestie — u64 for the big one, u32 holding it down mid-tier, u16 keeping it cute, then a whole squad of u8s, and finally an enum cxl_mem_repair_type as the main character at the end. the way that it's ordered? iconic. 🫶

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👑 Members 👑

🦋 the address-y ones

• dpa — DPA of memory to repair. that's the direct physical address, the where of it all, the coordinates of the vibes you're fixing 💫

✨ nibble_mask

nibble mask — identifies one or more nibbles on the memory bus. it's giving "which half-bytes are we talking about" 🍓 literally nibbles. plural-able. a mask of them. we love a bit of precision.

🌈 the "where in the memory" squad

each of these is literally just the thing it says on the tin — the row/column/etc of memory to repair, one per kind of coordinate:

• row — row of memory to repair 🌸
• column — column of memory to repair 🌸
• channel — channel of memory to repair 🌸
• sub_channel — sub channel of memory to repair 🌸
• rank — rank of memory to repair 🌸
• bank_group — bank group of memory to repair 🌸
• bank — bank of memory to repair 🌸

it's a whole coordinate system bestie, every level of it, and struct is holding all of them at once like the generous icon it is 💅

🔥 repair_type

repair type — for eg. PPR, memory sparing etc. so this is the what kind of repair field, because "repair" is a whole spectrum and we are not out here guessing. PPR? memory sparing? etc.? all covered, all valid, all slay 💀

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👀 SEE ALSO 👀

• Kernel file ./drivers/cxl/core/edac.c — go read it, that's where the plot happens 🧚

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ngl this page is short but it's complete — nothing skipped, nothing summarised, we keep every field. periodt. 💜

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made with love in ./drivers/cxl/core, dated October 2026, and yeah — it really is struct cxl_m...epair_attrbs(9) at the bottom too, just like the original, because the footer eats and we respect it 😭🎀