[Bug 215906] DMAR fault when connected usb hub (xhci_hcd)

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https://bugzilla.kernel.org/show_bug.cgi?id=215906

--- Comment #23 from Rolf Reintjes (lists.rolf@xxxxxxxxxxxx) ---
(In reply to Michał Pecio from comment #22)
> That's good to hear. Just to be sure, can you confirm that without this
> quirk the problem still exists today, on the same machine running the same
> kernel?

The problem still exists today.
rolf@i7-5820K-debian-testing1:~$ uname -a
Linux i7-5820K-debian-testing1 6.12.5-amd64 #1 SMP PREEMPT_DYNAMIC Debian
6.12.5-1 (2024-12-15) x86_64 GNU/Linux


> BTW, there is speculation that the Zhaoxin bug may be caused by odd page
> size requirements of some controllers. If your kernel has debugfs enabled,
> please also post the output of:
> 
> grep PAGESIZE /sys/kernel/debug/usb/xhci/*/reg-op

rolf@i7-5820K-debian-testing1:~$ sudo grep PAGESIZE
/sys/kernel/debug/usb/xhci/*/reg-op
grep: /sys/kernel/debug/usb/xhci/*/reg-op: Datei oder Verzeichnis nicht
gefunden

Which is translated: File or directory not found


> lspci -nn |grep USB

rolf@i7-5820K-debian-testing1:~$ lspci -nn |grep USB
00:14.0 USB controller [0c03]: Intel Corporation C610/X99 series chipset USB
xHCI Host Controller [8086:8d31] (rev 05)
00:1a.0 USB controller [0c03]: Intel Corporation C610/X99 series chipset USB
Enhanced Host Controller #2 [8086:8d2d] (rev 05)
00:1d.0 USB controller [0c03]: Intel Corporation C610/X99 series chipset USB
Enhanced Host Controller #1 [8086:8d26] (rev 05)
05:00.0 USB controller [0c03]: VIA Technologies, Inc. VL805/806 xHCI USB 3.0
Controller [1106:3483] (rev 01)
06:00.0 USB controller [0c03]: ASMedia Technology Inc. ASM1142 USB 3.1 Host
Controller [1b21:1242]

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