STRUCT PMC_DEV_INFO(9)

💖 struct pmc_dev_info(9) 💖

okay so bestie, welcome to the Kernel API Manual — this is the page for struct pmc_dev_info, which is literally the structure that keeps all the PMC device info together. like it's the lil filing cabinet for everything the driver needs to know about a PMC device 🗂️✨

🌸 SYNOPSIS 🌸

struct pmc_dev_info {
    u32 *dmu_guids;
    u32 pc_guid;
    u32 pkgc_ltr_blocker_offset;
    u32 pkgc_blocker_offset;
    u8 num_pmcs;
    const u8 *pmc_list;
    struct pmc_info *regmap_list;
    const struct pmc_reg_map *map;
    const struct file_operations *sub_req_show;
    const char **pkgc_ltr_blocker_counters;
    const char **pkgc_blocker_counters;
    void (*suspend)(struct pmc_dev *pmcdev);
    int (*resume)(struct pmc_dev *pmcdev);
    int (*init)(struct pmc_dev *pmcdev, struct pmc_dev_info
*pmc_dev_info);
    int (*sub_req)(struct pmc_dev *pmcdev, struct pmc *pmc, struct
telem_endpoint *ep);
    bool ssram_hidden;
    u32 die_c6_offset;
 };

that's the whole layout, no cap — every field stays exactly where it is 🫶

🎀 Members 🎀

• dmu_guids — the list of Die Management Unit GUIDs. like a guest list for the DMU party 💅
• pc_guid — the GUID for the telemetry region we read PKGC blocker info from 📍
• pkgc_ltr_blocker_offset — offset to the PKGC LTR blockers, inside that telemetry region
• pkgc_blocker_offset — offset to the PKGC blocker, also inside the telemetry region
• num_pmcs — how many entries live in pmc_list. the headcount, basically 🔢
• pmc_list — index list of the PMCs that are available
• regmap_list — pointer to a list of pmc_info structures that could be available for the platform. when this field is set, it implies SSRAM support ✨ (iykyk)
• map — pointer to a pmc_reg_map struct holding the platform specific attributes of the primary PMC 👑
• sub_req_show — file operations used to show substate requirements
• pkgc_ltr_blocker_counters — array of PKGC LTR blocker counters
• pkgc_blocker_counters — array of PKGC blocker counters
• suspend — function that does the platform specific suspend 😴
• resume — function that does the platform specific resume ☀️
• init — function that does the platform specific init action 🚀
• sub_req — function to achieve the low power mode substate requirements ⚡
• ssram_hidden — some SSRAM devices are hidden on this platform 🙈
• die_c6_offset — telemetry offset used to read Die C6 residency

🦋 SEE ALSO 🦋

• Kernel file ./drivers/platform/x86/intel/pmc/core.h
• struct pmc_reg_map(9)
• struct pmc_info(9)
• struct pmc(9)
• struct pmc_dev(9)

go read those next bestie, they're all part of the same little friend group fr fr 🫶

okay that's the whole page, mwah 💋 — this one lives in ./drivers/platform/x86/intel/pmc and it's dated October 2026, and the header up top calls it struct pmc_dev_info(9). slay, you're done, go touch some grass 🌱💜