kvm_mips_count_enable_cause(9)

🎀 kvm_mips_count_enable_cause(9) 🎀

okay so hi bestie, welcome to the Kernel API Manual ✨ this one is a little MIPS/KVM timer moment and it's giving “be careful with ordering” energy fr fr.

💖 NAME 💖

kvm_mips_count_enable_cause — Enable count using CP0_Cause.DC.

🌸 SYNOPSIS 🌸

void kvm_mips_count_enable_cause (struct kvm_vcpu *vcpu );

🦋 ARGUMENTS 🦋

• vcpu — Virtual CPU.

✨ DESCRIPTION ✨

This function enables the CP0_Count timer and clears CP0_Cause.DC. A timer interrupt after the start time will be handled if the timer isn't disabled by count_ctl.DC, potentially before even returning, so the caller should be careful with ordering of CP0_Cause modifications so as not to lose it.

lowkey important: it assumes CP0_Cause.DC is set (count disabled). So don't skip the setup, okay? 💅

🧚 SEE ALSO 🧚

Kernel file: ./arch/mips/kvm/emulate.c — and the whole squad is:

• kvm_get_badinstr(9)
• kvm_get_badinstrp(9)
• kvm_mips_count_disabled(9)
• kvm_mips_ktime_to_count(9)
• kvm_mips_count_time(9)
• kvm_mips_read_count_running(9)
• kvm_mips_read_count(9)
• kvm_mips_freeze_hrtimer(9)
• kvm_mips_resume_hrtimer(9)
• kvm_mips_restore_hrtimer(9)
• kvm_mips_write_count(9)
• kvm_mips_init_count(9)
• kvm_mips_set_count_hz(9)
• kvm_mips_write_compare(9)
• kvm_mips_count_disable(9)
• kvm_mips_count_disable_cause(9)
• kvm_mips_set_count_ctl(9)
• kvm_mips_set_count_resume(9)
• kvm_mips_count_timeout(9)

xoxo, source: ./arch/mips/kvm · version/page: kvm_mips_count_enable_cause(9) · date: October 2026 — mwah 💋