STRUCT PFRU_UPDATE_CAP_INFO(9)

💅 NAME

struct pfru_update_cap_info — bestie, this is the runtime update capability information struct, and it's lowkey the main character of the PFRU update flow ✨

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🌸 SYNOPSIS

struct pfru_update_cap_info {
    __u32 status;
    __u32 update_cap;
    __u8 code_type[16];
    __u32 fw_version;
    __u32 code_rt_version;
    __u8 drv_type[16];
    __u32 drv_rt_version;
    __u32 drv_svn;
    __u8 platform_id[16];
    __u8 oem_id[16];
    __u32 oem_info_len;
 };

Ok so like, that's the whole vibe right there — copy it exactly, no notes 🫶

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🧩 Members

Every field, every detail, no skips, we ate 💅

• status — tells you whether this query actually succeeded. It's the vibe check for the whole struct, ngl.
• update_cap — a bitmap, and it's giving "which features are supported, queen?" 🔥 Each bit is a yes/no.
• code_type — a buffer holding an image type GUID. Very official, very iconic.
• fw_version — the platform firmware version. Classic.
• code_rt_version — the code injection runtime version, and it exists for anti-rollback purposes 👑 (yes bestie, it's the "don't let anyone downgrade you" field, honestly so real of it).
• drv_type — another buffer, also holding an image type GUID. Same energy as code_type, different field 💖
• drv_rt_version — the version of the driver update runtime code. Periodt.
• drv_svn — the secure version number (SVN) of that driver update runtime code. It's the security girlie of the group 🎀
• platform_id — a buffer containing a platform ID GUID. Slay.
• oem_id — a buffer containing an OEM ID GUID. Also slay ✨
• oem_info_len — the length of the buffer that holds the vendor specific information. So like, how much vendor lore there is 📏

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🦋 SEE ALSO

Ok so first up, the actual kernel file you wanna peek at:

./include/uapi/linux/pfrut.h

And then the whole friend group 😭 literally all of these, go read them:

• PFRU_IOC_SET_REV(9)
• PFRU_IOC_STAGE(9)
• PFRU_IOC_ACTIVATE(9)
• PFRU_IOC_STAGE_ACTIVATE(9)
• PFRU_IOC_QUERY_CAP(9)
• struct pfru_payload_hdr(9)
• struct pfru_com_buf_info(9)
• struct pfru_updated_result(9)
• struct pfrt_log_data_info(9)
• struct pfrt_log_info(9)
• PFRT_LOG_IOC_SET_INFO(9)
• PFRT_LOG_IOC_GET_INFO(9)
• PFRT_LOG_IOC_GET_DATA_INFO(9)

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bestie reminder 🫶 everything above lives in ./include/uapi/linux and this absolute queen of a page is dated October 2026. Go off 💜

mwah 💋 that's the whole page, no cap — source ./include/uapi/linux, dated October 2026, from the Kernel API Manual. Stan. 🌈