STRUCT ISST_PERF_LEVEL_FABRIC_INFO(9)

💅 struct isst_perf_level_fabric_info 💅

okay so this is a page from the Kernel API Manual, and bestie, we're about to make fabric frequencies make sense. this struct is genuinely one of the good ones — it's just here to hand you the frequency deets for fabrics, no cap.

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✨ NAME ✨

struct isst_perf_level_fabric_info — the structure you use to get the SST-PP fabric details 🧵✨

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🌸 SYNOPSIS 🌸

struct isst_perf_level_fabric_info {
    __u8 socket_id;
    __u8 power_domain_id;
    __u16 level;
    __u16 max_fabrics;
    __u16 p0_fabric_freq_mhz[MAX_FABRIC_COUNT];
    __u16 p1_fabric_freq_mhz[MAX_FABRIC_COUNT];
    __u16 pm_fabric_freq_mhz[MAX_FABRIC_COUNT];
 };

like, that's the whole struct. she's compact, she's iconic, she's giving exactly what she needs to give 🎀

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🦋 Members 🦋

• socket_id — the socket/package id, i.e. which socket we're talking about, iykyk
• power_domain_id — the Power Domain id 💜
• level — the SST-PP level the caller wants to get information for — you pick the level, she tells you about that level
• max_fabrics — the count of fabrics in the resonse (that's the original spelling bestie, not me, we stan anyway 🙈)
• p0_fabric_freq_mhz — the Fabric (Uncore) maximum frequency 🔥
• p1_fabric_freq_mhz — the Fabric (Uncore) TDP frequency ✨
• pm_fabric_freq_mhz — the Fabric (Uncore) minimum frequency 🌙

💀 quick vibe check: the three frequency arrays are all sized MAX_FABRIC_COUNT, so mind those bounds, bestie.

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🌈 Description 🌈

okay so picture this: this is the structure used to get information on frequencies for fabrics. that's literally the whole job. you want fabric frequency info, you come here, she delivers — main character energy, no notes 👑

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👑 SEE ALSO 👑

where she lives: the kernel file ./include/uapi/linux/isst_if.h 📁

and her whole friend group, all in struct form, all iconic:

• struct isst_if_platform_info(9)
• struct isst_if_cpu_map(9)
• struct isst_if_cpu_maps(9)
• struct isst_if_io_reg(9)
• struct isst_if_io_regs(9)
• struct isst_if_mbox_cmd(9)
• struct isst_if_mbox_cmds(9)
• struct isst_if_msr_cmd(9)
• struct isst_if_msr_cmds(9)
• struct isst_core_power(9)
• struct isst_clos_param(9)
• struct isst_if_clos_assoc(9)
• struct isst_if_clos_assoc_cmds(9)
• struct isst_tpmi_instance_count(9)
• struct isst_perf_level_info(9)
• struct isst_perf_level_control(9)
• struct isst_perf_feature_control(9)
• struct isst_perf_level_data_info(9)
• struct isst_perf_level_cpu_mask(9)
• struct isst_base_freq_info(9)
• struct isst_turbo_freq_info(9)

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that's the whole page, bestie — go get those fabric frequencies 💖✨🫶

signed, sealed, delivered from ./include/uapi/linux, dated October 2026 — this page ate and left absolutely no crumbs 💅🎀