From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 604722AF1D for ; Mon, 23 Dec 2024 09:57:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734947828; cv=none; b=KW/v1xzfX4VrPWUpSwYJY0SERYIdCVG7hc4uB4S7cJmoSAk0Dn+U/UQruyRRGx+PJxSpYQC4xVVOKTRPahhyz/plX1voLcBt1LDM1OCxBjB9Ck/H/2UCfQMBLaM9NqQCZq/XwttVhz0uGDv82YFUd/vl94l2npiK+msjUy4JQG4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734947828; c=relaxed/simple; bh=re+WCYQwfNFB8Z2ROlTvp1IDsgwiuftxyABALC1wEmE=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=b+VuuYjJ2E7oP7AiPuhtkDt0zHI4KeFydO9uVoYG1tekNNBifaByI4TOTRS75l+NfpTe9BPjNBl9yjuVZBNie4ADcJInMaKfy2xzKpMjc3PVGNH56lvg0iPyRH2zIeP4hvewiyB4xldGCQ6vUZnKg/LHeQKzy0sXU7V1OCl0m1Y= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=WYLujYux; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="WYLujYux" Received: by smtp.kernel.org (Postfix) with ESMTPS id E0A75C4CEDF for ; Mon, 23 Dec 2024 09:57:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1734947827; bh=re+WCYQwfNFB8Z2ROlTvp1IDsgwiuftxyABALC1wEmE=; h=From:To:Subject:Date:In-Reply-To:References:From; b=WYLujYuxYhMKUYfm1xUNy7jVAbXGF9l0bXxnrzcZKH6JFsIbH+RCpWQXOBRHdI53r oimhVrDyCKoGvcljF6X1aTQ1IVl0Y7qhCJqovUHQGvB5IYRkjvJ3GP4zRxdPvnMJzr 8oRVgcv5T348c9Lf5IV5TrHELldHxhzFtn8caCBdYO4+bsFykV2F5FMILRqjaPez5F OVbJ+Fh/Hjszfz5fcx29wGTC5/A59CfhL3RIKJS5Y/kA/BuK8UlIELn267MIVvzTzJ 2ELaA2Hwhr0GeOUnV7PmgtDVs5WkxUSfrgBziKuC9M39Pkb8Khc8QJdvYbYe+4A5wx BoGBFK8UyLhBQ== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id D5861C41613; Mon, 23 Dec 2024 09:57:07 +0000 (UTC) From: bugzilla-daemon@kernel.org To: linux-usb@vger.kernel.org Subject: [Bug 215906] DMAR fault when connected usb hub (xhci_hcd) Date: Mon, 23 Dec 2024 09:57:07 +0000 X-Bugzilla-Reason: None X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: AssignedTo drivers_usb@kernel-bugs.kernel.org X-Bugzilla-Product: Drivers X-Bugzilla-Component: USB X-Bugzilla-Version: 2.5 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: lists.rolf@reintjes.nrw X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P1 X-Bugzilla-Assigned-To: drivers_usb@kernel-bugs.kernel.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 https://bugzilla.kernel.org/show_bug.cgi?id=3D215906 --- Comment #21 from Rolf Reintjes (lists.rolf@reintjes.nrw) --- (In reply to Micha=C5=82 Pecio from comment #20) > By a complete accident I found that VL805 has a known bug where it > overfetches transfer rings: > https://github.com/raspberrypi/linux/issues/4685 >=20 > Rolf, there is a workaround for similar bug in Zhaoxin hardware which may > solve your IOMMU faults. >=20 > Update to at least v6.6, or the latest v6.12 series if it's not a problem. >=20 > Run the following (if using a USB keyboard put it all in a script): > rmmod xhci_pci > rmmod xhci_hcd > modprobe xhci_hcd quirks=3D0x200000000000 > modprobe xhci_pci >=20 > Verify that it worked: > dmesg |grep quirks > [122123.422469] xhci_hcd 0000:08:00.0: hcc params 0x002841eb hci version > 0x100 quirks 0x0000200000000890 >=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20 > ^-- here > And see if it helps. Thank you very much. I just tried it and it works. The USB port runs fine. But what is actually done here? modprobe xhci_hcd quirks=3D0x200000000000 A setting is given to the driver when starting, but what does this setting mean? --=20 You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.=