cpacf_query(9)

💅 cpacf_query(9) 💅

🌸 NAME 🌸

okay so bestie, this is cpacf_query from the Kernel API Manual — the little icon whose whole job is: Query the function code mask for this CPACF opcode. 💖 literally that. no cap.

✨ SYNOPSIS ✨

int cpacf_query (unsigned int opcode , cpacf_mask_t *mask );

🎀 ARGUMENTS 🎀

• opcode — the opcode of the crypto instruction 🔢
• mask — ptr to struct cpacf_mask_t 🫶

💅 DESCRIPTION 💅

Executes the query function for the given crypto instruction opcode and checks if func is available. periodt. ✨

On success, 1 is returned and the mask is filled with the function code mask for this CPACF opcode. Otherwise, 0 is returned. that's the whole return-value tea: 1 = success + filled mask, 0 = not today. 💀

🔗 SEE ALSO 🔗

Kernel file ./arch/s390/include/asm/cpacf.h is the home base 🏠 — and bestie, go say hi to these too:

• cpacf_qai(9)
• cpacf_km(9)
• cpacf_kmc(9)
• cpacf_kimd(9)
• cpacf_klmd(9)
• _cpacf_kmac(9)
• cpacf_kmac(9)
• cpacf_kmctr(9)
• cpacf_prno(9)
• cpacf_trng(9)
• cpacf_pcc(9)
• cpacf_pckmo(9)
• cpacf_kma(9)

xoxo, this one's from source/version ./arch/s390/include/asm, dated October 2026. mwah 💋🎀