setup_apcb11(9)

🎀 NAME 🎀

setup_apcb11 — Copy the FORMAT1 APCB from the guest to the shadow CRYCB 💅

okay so this is the Kernel API Manual page for setup_apcb11(9), and it's literally here to copy the FORMAT1 APCB from the guest over to the shadow CRYCB. no cap. ✨

🌸 SYNOPSIS 🌸

int setup_apcb11 (struct kvm_vcpu *vcpu , unsigned long *apcb_s ,
       unsigned long crycb_gpa , unsigned long *apcb_h );

🦋 ARGUMENTS 🦋

• vcpu — pointer to the virtual CPU
• apcb_s — pointer to start of apcb in the shadow crycb
• crycb_gpa — guest physical address to start of original guest crycb
• apcb_h — pointer to start of apcb in the host

💜 DESCRIPTION 💜

So the return vibe is: it returns 0, and -EFAULT on error reading guest apcb. that's the whole mood. 🫶

👑 SEE ALSO 👑

Kernel file ./arch/s390/kvm/s390/vsie.c — plus setup_apcb00(9), setup_apcb(9), and shadow_crycb(9). go read those too, bestie, iykyk 🔥

mwah 💋 this page lives in ./arch/s390/kvm/s390, and it’s dated October 2026. iconic. 🎀🌈