plpks_get_maxpwsize(9)

💅 plpks_get_maxpwsize(9) — the plpks kernel API manual, bestie edition 💅

okay so this is a page from the Kernel API Manual (the plpks corner of it) and it's literally about getting the maximum password size. that's the whole vibe. let's go 🫶

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✨ NAME ✨

plpks_get_maxpwsize — Get the maximum password size.

like... it gets the maximum password size. that's her whole job. icon behavior honestly 👑

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🌸 SYNOPSIS 🌸

u16 plpks_get_maxpwsize (void );

she takes nothing, she returns a u16. lowkey the easiest relationship you'll ever be in 💖

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🎀 ARGUMENTS 🎀

• void — no arguments. none. zero. not a single one. she doesn't need your input, she's booked and busy ✨

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🦋 DESCRIPTION 🦋

so here's the lore 🍓: during initialization, when the H_PKS_GET_CONFIG HCALL runs successfully, it reads the maximum password size. then it checks that it's 32 bytes at the least — like a little vibe check on the number 👀 — and then it stores it in the local static maxpwsize variable.

so yeah: successful H_PKS_GET_CONFIG HCALL at init time → read the max password size → confirm it's at least 32 bytes → stash it in the static maxpwsize. that's the whole pipeline, no cap 🔥

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⭐ RETURN ⭐

• On success, the maximum password size is returned 💫
• 0 if not 🙈

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🌈 SEE ALSO 🌈

the kernel file lives at ./arch/powerpc/platforms/pseries/plpks.c — go read her, she's iconic 💜

and then the whole friend group, fr fr:

• plpks_get_version(9)
• plpks_get_objoverhead(9)
• plpks_get_maxobjectsize(9)
• plpks_get_maxobjectlabelsize(9)
• plpks_get_totalsize(9)
• plpks_get_usedspace(9)
• plpks_get_supportedpolicies(9)
• plpks_get_maxlargeobjectsize(9)
• plpks_get_signedupdatealgorithms(9)
• plpks_get_wrappingfeatures(9)
• plpks_get_passwordlen(9)
• plpks_is_available(9)
• plpks_signed_update_var(9)
• plpks_write_var(9)
• plpks_remove_var(9)
• plpks_wrapping_is_supported(9)
• plpks_gen_wrapping_key(9)
• plpks_wrap_object(9)
• plpks_unwrap_object(9)
• plpks_read_os_var(9)
• plpks_read_fw_var(9)
• plpks_read_bootloader_var(9)
• plpks_populate_fdt(9)
• plpks_early_init_devtree(9)

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💀 reminder bestie: H_PKS_GET_CONFIG has to actually succeed during init for any of this to have happened — otherwise the static maxpwsize isn't getting that cute little store, and you get a 0 back. no drama, just facts 🧚

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and that's the page!! sourced from ./arch/powerpc/platforms/pseries, dated October 2026 — mwah, she ate, periodt 💅🎀✨