From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 3681D4617B; Mon, 3 Feb 2025 05:26:02 +0100 (CET) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 0125D40287; Mon, 3 Feb 2025 05:26:02 +0100 (CET) Received: from inbox.dpdk.org (inbox.dpdk.org [95.142.172.178]) by mails.dpdk.org (Postfix) with ESMTP id 9948040264 for ; Mon, 3 Feb 2025 05:26:00 +0100 (CET) Received: by inbox.dpdk.org (Postfix, from userid 33) id 8EE1E4617C; Mon, 3 Feb 2025 05:26:00 +0100 (CET) From: bugzilla@dpdk.org To: dev@dpdk.org Subject: [DPDK/testpmd Bug 1651] Linux kernel 4.10.0 iommu attribute read error Date: Mon, 03 Feb 2025 04:26:00 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: DPDK X-Bugzilla-Component: testpmd X-Bugzilla-Version: unspecified X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: nandinipersad361@gmail.com X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Resolution: X-Bugzilla-Priority: Normal X-Bugzilla-Assigned-To: dev@dpdk.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter target_milestone Message-ID: Content-Type: multipart/alternative; boundary=17385567600.F2C473.2166802 Content-Transfer-Encoding: 7bit X-Bugzilla-URL: http://bugs.dpdk.org/ Auto-Submitted: auto-generated X-Auto-Response-Suppress: All MIME-Version: 1.0 X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org --17385567600.F2C473.2166802 Date: Mon, 3 Feb 2025 05:26:00 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://bugs.dpdk.org/ Auto-Submitted: auto-generated X-Auto-Response-Suppress: All https://bugs.dpdk.org/show_bug.cgi?id=3D1651 Bug ID: 1651 Summary: Linux kernel 4.10.0 iommu attribute read error Product: DPDK Version: unspecified Hardware: All OS: Linux Status: UNCONFIRMED Severity: normal Priority: Normal Component: testpmd Assignee: dev@dpdk.org Reporter: nandinipersad361@gmail.com Target Milestone: --- When VT-d is enabled (iommu=3Dpt intel_iommu=3Don), reading IOMMU attribute= s from /sys/devices/virtual/iommu/dmarXXX/intel-iommu/cap on Linux kernel 4.10.0 error. This bug is fixed in Linux commit a7fdb6e648fb, This bug is introduc= ed in Linux commit 39ab9555c241, Implication: When binding devices to VFIO and attempting to run testpmd application, tes= tpmd (and other DPDK applications) will not initialize. Resolution/Workaround: Use other linux kernel version. It only happens in linux kernel 4.10.0. Affected Environment/Platform: ALL OS of linux kernel 4.10.0. Driver/Module: vfio-pci module. --=20 You are receiving this mail because: You are the assignee for the bug.= --17385567600.F2C473.2166802 Date: Mon, 3 Feb 2025 05:26:00 +0100 MIME-Version: 1.0 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://bugs.dpdk.org/ Auto-Submitted: auto-generated X-Auto-Response-Suppress: All

Bug ID	1651
Summary	Linux kernel 4.10.0 iommu attribute read error
Product	DPDK
Version	unspecified
Hardware	All
OS	Linux
Status	UNCONFIRMED
Severity	normal
Priority	Normal
Component	testpmd
Assignee	dev@dpdk.org
Reporter	nandinipersad361@gmail.com
Target Milestone	---

When VT-d is enabled (iommu=3Dpt i=
ntel_iommu=3Don), reading IOMMU attributes from
/sys/devices/virtual/iommu/dmarXXX/intel-iommu/cap on Linux kernel 4.10.0
error. This bug is fixed in Linux commit a7fdb6e648fb, This bug is introduc=
ed
in Linux commit 39ab9555c241,

Implication:
When binding devices to VFIO and attempting to run testpmd application, tes=
tpmd
(and other DPDK applications) will not initialize.

Resolution/Workaround:
Use other linux kernel version. It only happens in linux kernel 4.10.0.

Affected Environment/Platform:
ALL OS of linux kernel 4.10.0.

Driver/Module:
vfio-pci module.

You are receiving this mail because:

You are the assignee for the bug.

=20=20=20=20=20=20=20=20=20=20

= --17385567600.F2C473.2166802--