STRUCT ACRN_MMIODEV(9)

💅 struct acrn_mmiodev(9) ✨

okay so bestie, grab a strawberry 🍓 — this one's from the Kernel API Manual, and it's literally just a little struct, but it's a main character struct, iykyk.

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🌸 NAME 🌸

struct acrn_mmiodev — the info bundle for assigning or de-assigning an MMIO device. that's it, that's the whole vibe 🎀

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🦋 SYNOPSIS 🦋

struct acrn_mmiodev {
    __u8 name[8];
    struct acrn_mmio_dev_res res[ACRN_MMIODEV_RES_NUM];
 };

no cap, that's the entire shape of it. two members, zero drama 💅

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👑 Members 👑

• name — the name of the MMIO device. it's a __u8 array of 8, so keep it cute and keep it short, bestie 🙈
• res — the array of MMIO device descriptions, sized ACRN_MMIODEV_RES_NUM. it's giving "plural, so bring a whole array" ✨

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💖 Description 💖

okay so this is the important bit: this structure gets passed to the hypervisor directly. like, straight through. no middleman, no vibe check in between 🫶 that's literally the whole description and honestly it ate.

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🌈 SEE ALSO 🌈

the whole friend group, fr fr 💜 — all of these live in the kernel file ./include/uapi/linux/acrn.h:

• 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_vcpu_regs(9)
• struct acrn_vm_memmap(9)
• struct acrn_ptdev_irq(9)
• struct acrn_pcidev(9)
• struct acrn_mmio_dev_res(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)

go read all of them, they're iconic, periodt 🔥

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ngl bestie, there's not a ton here — but everything that is here is exact, so don't go renaming name or resizing res on me 😭

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and that's the whole page!! mwah 💋 this cutie lives at ./include/uapi/linux, the page itself is dated October 2026, and yeah — it's struct acrn_mmiodev(9) all the way down 🧚⭐