STRUCT ACRN_VCPU_REGS(9)

🦋 struct acrn_vcpu_regs(9) 🦋

okay so bestie, this is a page from the Kernel API Manual and it's literally about one lil struct that tells you everything about a vCPU's register state. it's giving backstage pass to the CPU's inner world 💅

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✨ NAME ✨

struct acrn_vcpu_regs — Info of vCPU registers state

like, the whole vibe check of what's going on inside those registers 🫶

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🌸 SYNOPSIS 🌸

struct acrn_vcpu_regs {
    __u16 vcpu_id;
    __u16 reserved[3];
    struct acrn_regs        vcpu_regs;
 };

not me obsessing over how tidy this is 😭 three fields, zero drama.

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🎀 Members 🎀

• vcpu_id — the vCPU ID. which vCPU are we talking about, bestie? this is the name tag 🏷️
• reserved — Reserved and must be 0. no cap, keep it at zero. it's reserved for a reason, don't get creative with it 🙈
• vcpu_regs — vCPU registers state. the actual main character of this struct, the real tea ☕

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💖 Description 💖

This structure will be passed to hypervisor directly.

yep. straight to the hypervisor, no middleman, no filter. it's giving direct line energy 👑

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🌈 SEE ALSO 🌈

all the sibling structs, from the kernel file ./include/uapi/linux/acrn.h — go read the whole family, they're all iconic in their own way ✨

• struct acrn_mmio_request(9)
• struct acrn_pio_request(9)
• struct acrn_pci_request(9)
• struct acrn_io_request(9)
• struct acrn_ioreq_notify(9)
• struct acrn_vm_creation(9)
• struct acrn_gp_regs(9)
• struct acrn_descriptor_ptr(9)
• struct acrn_regs(9)
• struct acrn_vm_memmap(9)
• struct acrn_ptdev_irq(9)
• struct acrn_pcidev(9)
• struct acrn_mmio_dev_res(9)
• struct acrn_mmiodev(9)
• struct acrn_vdev(9)
• struct acrn_msi_entry(9)
• struct acrn_cstate_data(9)
• struct acrn_pstate_data(9)
• struct acrn_ioeventfd(9)
• struct acrn_irqfd(9)

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lowkey the most important thing on this whole page: reserved must be 0. i'm not playing, the kernel is not playing, nobody is playing 💀

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k bye bestie, this page lives in ./include/uapi/linux and it's dated October 2026 — slay, go read it again whenever you forget what a vCPU's registers are up to 🍓💜