kvm_pmu_set_...r_value_user(9)

💖 kvm_pmu_set_counter_value_user — the Kernel API Manual tea 💖

okay so bestie, this one lives in the Kernel API Manual and it's called kvm_pmu_set_counter_value_user — and yes the name is a whole mouthful, iykyk. It's a void function, which means it doesn't hand anything back, it just does the thing. Main character energy fr fr.

Its whole vibe? Setting a PMU counter value from user. That's it, that's the plot. 🎀

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✨ SYNOPSIS ✨

void kvm_pmu_set_counter_value_user (struct kvm_vcpu *vcpu , u64
select_idx , u64 val );

literally the entire signature, no cap. three args, one void, zero drama. 🦋

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🌸 ARGUMENTS 🌸

• vcpu — the vcpu pointer 💅 like, the actual virtual CPU you're talking about. this is the main character of the argument list ngl.
• select_idx — the counter index 🔢 which counter we're messing with, bestie, pick one.
• val — the counter value ⭐ the number that's gonna get set. the payload. the whole point.

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👑 SEE ALSO 👑

okay so this is where it gets iconic — the whole PMU friend group shows up. this is the group chat, and everyone's here:

• Kernel file ./arch/arm64/kvm/pmu-emul.c 📁 (yes, that's where the magic lives)
• kvm_pmc_is_64bit(9)
• kvm_pmu_get_counter_value(9)
• kvm_pmu_set_counter_value(9)
• kvm_pmu_release_perf_event(9)
• kvm_pmu_stop_counter(9)
• kvm_pmu_vcpu_init(9)
• kvm_pmu_vcpu_destroy(9)
• kvm_pmu_flush_hwstate(9)
• kvm_pmu_sync_hwstate(9)
• kvm_pmu_software_increment(9)
• kvm_pmu_handle_pmcr(9)
• kvm_pmu_create_perf_event(9)
• kvm_pmu_set_counter_event_type(9)
• kvm_arm_pmu_get_max_counters(9)
• kvm_arm_set_default_pmu(9)
• kvm_vcpu_read_pmcr(9)

like… the entire roster. ate and left no crumbs. 🔥

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ngl bestie, if you're reading a page with (9) after every single name, you're in kernel-doc territory — that's the section number, it's giving "yes I read the source, and also the docs." 💀

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and that's the whole page!! 🫶 this lil beauty comes from ./arch/arm64/kvm and it's dated October 2026, so jot that down — mwah, love u, go set some counters. 💜🎀🌸