[Bug 263469] PCI class 0x13 (instrumentation) not given a name

From: <bugzilla-noreply_at_freebsd.org>
Date: Fri, 22 Apr 2022 14:40:43 UTC

--- Comment #1 from commit-hook@FreeBSD.org ---
A commit in branch main references this bug:


commit f010b9c2b9b0a550656de8a5b5ad1469630c3e2c
Author:     John F. Carr <jfc@mit.edu>
AuthorDate: 2022-04-22 14:28:34 +0000
Commit:     Stefan E├čer <se@FreeBSD.org>
CommitDate: 2022-04-22 14:39:23 +0000

    pci: recognize "non-essential instrumentation" devices

    Some AMD EPYC VCPUs generated boot message of the type:

         pci4: <unknown> at device 0.0 (no driver attached)

    These are displayed for device class 0x13 devices, e.g.:

    none8@pci0:130:0:0:     class=0x130000 rev=0x00 hdr=0x00 vendor=0x1022 \
                            device=0x148a subvendor=0x1022 subdevice=0x148a
        vendor     = 'Advanced Micro Devices, Inc. [AMD]'
        device     = 'Starship/Matisse PCIe Dummy Function'
        class      = non-essential instrumentation

    Since these devices serve no purpose (no driver attaches) I have
    enabled the reporting of suich devices only for verbose boots (a
    diversion from the patch provided in the PR).

    A verbose boot will now display such devices as:

      pci4: <non-essential instrumentation> at device 0.0 (no driver attached)

    PR:             263469
    Reported by:    jfc@mit.edu (John F. Carr)
    MFC after:      1 week

 sys/dev/pci/pci.c | 1 +
 1 file changed, 1 insertion(+)

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