I made lsiommu as I just wanted to get rid of the shitty combination of bash and python I had before:
~/work/staging/lsiommu master*
❯ build/lsiommu
IOMMU Group 0
00:07.1 Class 060400: Vendor 8086 Device 9a25 [8086:9a25] (rev 01)
IOMMU Group 1
00:07.0 Class 060400: Vendor 8086 Device 9a23 [8086:9a23] (rev 01)
IOMMU Group 2
00:02.0 Class 030000: Vendor 8086 Device 9a49 [8086:9a49] (rev 01)
IOMMU Group 3
00:00.0 Class 060000: Vendor 8086 Device 9a14 [8086:9a14] (rev 01)
IOMMU Group 4
00:04.0 Class 118000: Vendor 8086 Device 9a03 [8086:9a03] (rev 01)
IOMMU Group 5
00:0a.0 Class 118000: Vendor 8086 Device 9a0d [8086:9a0d] (rev 01)
IOMMU Group 6
00:0d.0 Class 0c0330: Vendor 8086 Device 9a13 [8086:9a13] (rev 01)
00:0d.2 Class 0c0340: Vendor 8086 Device 9a1b [8086:9a1b] (rev 01)
IOMMU Group 7
00:0e.0 Class 010400: Vendor 8086 Device 9a0b [8086:9a0b] (rev 00)
IOMMU Group 8
00:14.0 Class 0c0330: Vendor 8086 Device a0ed [8086:a0ed] (rev 20)
00:14.2 Class 050000: Vendor 8086 Device a0ef [8086:a0ef] (rev 20)
IOMMU Group 9
00:14.3 Class 028000: Vendor 8086 Device a0f0 [8086:a0f0] (rev 20)
IOMMU Group 10
00:15.0 Class 0c8000: Vendor 8086 Device a0e8 [8086:a0e8] (rev 20)
IOMMU Group 11
00:16.0 Class 078000: Vendor 8086 Device a0e0 [8086:a0e0] (rev 20)
IOMMU Group 12
00:1d.0 Class 060400: Vendor 8086 Device a0b0 [8086:a0b0] (rev 20)
IOMMU Group 13
00:1f.0 Class 060100: Vendor 8086 Device a082 [8086:a082] (rev 20)
00:1f.3 Class 040100: Vendor 8086 Device a0c8 [8086:a0c8] (rev 20)
00:1f.4 Class 0c0500: Vendor 8086 Device a0a3 [8086:a0a3] (rev 20)
00:1f.5 Class 0c8000: Vendor 8086 Device a0a4 [8086:a0a4] (rev 20)
IOMMU Group 14
55:00.0 Class 010802: Vendor 144d Device a808 [144d:a808] (rev 00)
Perhaps the most interesting implementation note is that it uses libudev for PCI discovery, instead of traversing sysfs (because the latter sucks).
Right and I made my own shitty teardown manager framwork:
/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* Copyright(c) Opinsys Oy 2025
*/
#ifndef TEARDOWN_H
#define TEARDOWN_H
#include <libudev.h>
#define teardown(func) __attribute__((cleanup(func)))
void teardown_udev(struct udev **udev);
void teardown_udev_device(struct udev_device **dev);
void teardown_udev_enumerate(struct udev_enumerate **enumerate);
#endif /* TEARDOWN_H */
Dependencies:
❯ ldd build/lsiommu
linux-vdso.so.1 (0x00007f083ccd5000)
libargtable2.so.0 => /lib/x86_64-linux-gnu/libargtable2.so.0 (0x00007f083cc8a000)
libudev.so.1 => /lib/x86_64-linux-gnu/libudev.so.1 (0x00007f083cc5c000)
libsystemd.so.0 => /lib/x86_64-linux-gnu/libsystemd.so.0 (0x00007f083cb8c000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f083c9ab000)
/lib64/ld-linux-x86-64.so.2 (0x00007f083ccd7000)
libcap.so.2 => /lib/x86_64-linux-gnu/libcap.so.2 (0x00007f083c99f000)
libgcrypt.so.20 => /lib/x86_64-linux-gnu/libgcrypt.so.20 (0x00007f083c856000)
liblzma.so.5 => /lib/x86_64-linux-gnu/liblzma.so.5 (0x00007f083c827000)
libzstd.so.1 => /lib/x86_64-linux-gnu/libzstd.so.1 (0x00007f083c76b000)
liblz4.so.1 => /lib/x86_64-linux-gnu/liblz4.so.1 (0x00007f083c745000)
libgpg-error.so.0 => /lib/x86_64-linux-gnu/libgpg-error.so.0 (0x00007f083c71d000)
I can throw this to some Git repository if anyone is interested any of this. It’s really just “by me for me”, but I neither mind sharing it.
