resctrl_arch...disable_bits(9)

okay bestie, welcome to resctrl_arch...disable_bits(9) from the Kernel API Manual — we're about to get into prefetch disable bits and pseudo-locking, and honestly it's giving very specific kernel energy 💅✨

🎀 NAME 🎀

• resctrl_arch_get_prefetch_disable_bits — prefetch disable bits of supported platforms

🦋 SYNOPSIS 🦋

u64 resctrl_arch_get_prefetch_disable_bits (void );

🌸 ARGUMENTS 🌸

• void — no arguments, like literally none, zero, nada 🫶

✨ DESCRIPTION ✨

So this one captures the list of platforms that have been validated to support pseudo-locking. That validation includes testing to make sure pseudo-locked regions with low cache miss rates can be created under a variety of load conditions, and also that those pseudo-locked regions can maintain their low cache miss rates under a variety of load conditions for significant lengths of time. iconic testing behavior, no cap 🔥

After a platform has been validated to support pseudo-locking, its hardware prefetch disable bits are included here as they are documented in the SDM. periodt.

When you add a platform here, also add support for its cache events to resctrl_arch_measure_l*_residency — don't leave your girl hanging 🙈

💖 RETURN 💖

If the platform is supported: the bits to disable hardware prefetchers. If the platform is not supported: 0. that's the whole vibe check 💀

🌈 SEE ALSO 🌈

• Kernel file ./arch/x86/kernel/cpu/resctrl/pseudo_lock.c
• resctrl_arch_pseudo_lock_fn(9)
• resctrl_arch_measure_cycles_lat_fn(9)

byeee 💅 this little page lives in the ./arch/x86/kernel/cpu/resctrl source/version corner, dated October 2026, and it's the resctrl_arch...disable_bits(9) page — mwah 🎀👑