STRUCT AP_CONFIG_INFO(9)

👑 struct ap_config_info(9) 👑

okay bestie, welcome to the Kernel API Manual ✨ — yes this is the real manual name, no cap, and today's main character is a little struct called struct ap_config_info 💅

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🌸 NAME 🌸

struct ap_config_info — a convenience struct for AP crypto config info as returned by the ap_qci() function 🫶

like literally, it's just here to make your life easier when ap_qci() hands you the config deets 💖

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✨ SYNOPSIS ✨

struct ap_config_info {
    union {
      unsigned int flags;
      struct {
        unsigned int apsc        : 1;
        unsigned int apxa        : 1;
        unsigned int qact        : 1;
        unsigned int rc8a        : 1;
        unsigned int             : 4;
        unsigned int apsb        : 1;
        unsigned int             : 23;
      };
    };
    unsigned char na;
    unsigned char nd;
    unsigned char _reserved0[10];
    unsigned int apm[8];
    unsigned int aqm[8];
    unsigned int adm[8];
    unsigned char _reserved1[16];
 };

no notes, she's iconic 💅 look at those bitfields — apsc, apxa, qact, rc8a, then a lil anonymous : 4 gap, then apsb, then an anonymous : 23 gap to round out the unsigned int. the way that padding just sits there doing nothing? mood 🙈

and yes, _reserved0[10] and _reserved1[16] are literally reserved, bestie — hands off 🚫 don't be touching those, they're not for you 🎀

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🦋 Members 🦋

• {unnamed_union} — anonymous 👻
• {unnamed_struct} — anonymous 👻

(they're the lil anonymous buddies nested inside the outer union, just vibing with no name of their own — iykyk ✨)

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🔥 SEE ALSO 🔥

• Kernel file ./arch/s390/include/asm/ap.h
• struct ap_queue_status(9)
• ap_instructions_available(9)
• ap_tapq(9)
• ap_test_queue(9)
• ap_qci(9)
• ap_aqic(9)
• ap_qact(9)
• ap_nqap(9)
• ap_dqap(9)

fr fr go read those next, they're all part of the same s390 AP friend group 🫶🌈

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🎀 quick vibe check: everything above is exactly what the page says — every flag, every field, every _reserved, every reference. nothing added, nothing skipped. slay 💖

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and that's the whole page babes ✨ this one lives in ./arch/s390/include/asm, dated October 2026, and it's still struct ap_config_info(9) in the Kernel API Manual — periodt 💅👑