STRUCT CXL_SWITCH_DECODER(9)

💅 struct cxl_switch_decoder(9) 💅

okay bestie, welcome to the Kernel API Manual entry for struct cxl_switch_decoder — it's literally the Switch specific CXL HDM Decoder. 💖

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✨ NAME ✨

struct cxl_switch_decoder — Switch specific CXL HDM Decoder. no cap, that's the name 🎀

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🌸 SYNOPSIS 🌸

okay so here's the literal struct, bestie — pls don't retype it wrong 🙈

struct cxl_switch_decoder {
    struct cxl_decoder cxld;
    int nr_targets;
    struct cxl_dport *target[];
};

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🎀 Members 🎀

the little squad inside the struct, one by one:

• cxld — base cxl_decoder object
• nr_targets — number of elements in target
• target — active ordered target list in current decoder configuration

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🦋 Description 🦋

so the switch decoder type represents the decoder instances of cxl_port's that route from the root of a CXL memory decode topology to the endpoints. 🫶

they come in two flavors: root-level decoders, statically defined by platform firmware, and mid-level decoders, where interleave-granularity, interleave-width, and the target list are mutable. periodt 💅

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🔥 SEE ALSO 🔥

go read these too, iykyk 👑

• Kernel file: ./drivers/cxl/cxl.h
• cxl objects(9)
• struct cxl_decoder(9)
• struct cxl_endpoint_decoder(9)
• struct cxl_rd_ops(9)
• struct cxl_root_decoder(9)
• struct cxl_region_params(9)
• struct cxl_region(9)
• struct cxl_port(9)
• struct cxl_root(9)
• struct cxl_dport(9)
• struct cxl_ep(9)
• struct cxl_region_ref(9)
• struct cxl_endpoint_dvsec_info(9)

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and that's the whole page, bestie 🫶 signing off from source ./drivers/cxl, dated October 2026, still serving struct cxl_switch_decoder(9) ✨💜