VIORTC_MSG_READ(9)

💅 VIORTC_MSG_READ(9) — the kernel API manual, but make it make sense ✨

okay so bestie, this is a page from the Kernel API Manual (yes, the whole VIORTC_MSG_READ(9) situation) and it's literally just one tiny macro that does one tiny job, but she does it flawlessly. let me walk you through it 🫶

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🌸 NAME 🌸

VIORTC_MSG_READ — read from a response message field. that's it. that's the whole gig. she reads, she converts, she writes. main character energy honestly 👑

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✨ SYNOPSIS ✨

VIORTC_MSG_READ (hdl , src_member , dest_ptr );

yep, three things go in, magic happens, periodt 💅

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🎀 ARGUMENTS 🎀

• hdl — the message handle. your little ticket to the message you're poking at 🎫
• src_member — the name of the response message field you wanna grab 🌷
• dest_ptr — pointer to data of a compatible type. key word being compatible, bestie, don't be out here pointing at nonsense 🙈

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🦋 DESCRIPTION 🦋

okay so here's the whole vibe: this thing converts from little-endian format and writes the result to dest_ptr. that's the entire description, no cap. endianness handled, data delivered, everyone goes home happy 💖

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🔥 SEE ALSO 🔥

this list is long and honestly kind of iconic, so buckle up — everything below is literally straight from the original, so you know I'm not making any of it up:

Kernel file ./drivers/virtio/virtio_rtc_driver.c and then, in no particular order (okay, in this exact order):

struct viortc_vq(9), struct viortc_dev(9), struct viortc_msg(9), viortc_class_from_dev(9), viortc_alarms_supported(9), viortc_feed_vq(9), viortc_msg_init(9), viortc_msg_release(9), viortc_do_cb(9), viortc_requestq_hdlr(9), viortc_cb_requestq(9), viortc_alarmq_hdlr(9), viortc_cb_alarmq(9), viortc_get_resp_errno(9), viortc_msg_xfer(9), VIORTC_DECLARE_MSG_HDL_ONSTACK(9), VIORTC_MSG(9), VIORTC_MSG_INIT(9), VIORTC_MSG_WRITE(9), viortc_read(9), viortc_read_cross(9), viortc_cfg(9), viortc_clock_cap(9), viortc_cross_cap(9), viortc_read_alarm(9), viortc_set_alarm(9), viortc_set_alarm_enabled(9), viortc_init_rtc_class_clock(9), viortc_init_ptp_clock(9), viortc_init_clock(9), viortc_clocks_deinit(9), viortc_clocks_init(9), viortc_populate_vq(9), viortc_alloc_vq_bufs(9), viortc_init_vqs(9), viortc_probe(9), viortc_remove(9)

like I said. long. but every single one of them belongs there, so they all stay 🌈

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ngl the whole page is three arguments and one sentence of description — short queen behavior — but every single fact is here, so we're slaying responsibly 💅

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and that's the page!! 🎀 this one lives in ./drivers/virtio and is dated October 2026 — catch you on the next one, bestie, mwah 💖🦋✨