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Message-ID: <20201112125531.GA873287@nvidia.com>
Date: Thu, 12 Nov 2020 08:55:31 -0400
From: Jason Gunthorpe <jgg@...dia.com>
To: Thomas Gleixner <tglx@...utronix.de>,
Ziyad Atiyyeh <ziyadat@...dia.com>,
Itay Aveksis <itayav@...dia.com>,
Moshe Shemesh <moshe@...dia.com>
CC: LKML <linux-kernel@...r.kernel.org>, <x86@...nel.org>,
Joerg Roedel <joro@...tes.org>,
<iommu@...ts.linux-foundation.org>, <linux-hyperv@...r.kernel.org>,
Haiyang Zhang <haiyangz@...rosoft.com>,
"Jon Derrick" <jonathan.derrick@...el.com>,
Lu Baolu <baolu.lu@...ux.intel.com>,
Wei Liu <wei.liu@...nel.org>,
"K. Y. Srinivasan" <kys@...rosoft.com>,
Stephen Hemminger <sthemmin@...rosoft.com>,
Steve Wahl <steve.wahl@....com>,
Dimitri Sivanich <sivanich@....com>,
Russ Anderson <rja@....com>, <linux-pci@...r.kernel.org>,
Bjorn Helgaas <bhelgaas@...gle.com>,
Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
<xen-devel@...ts.xenproject.org>, Juergen Gross <jgross@...e.com>,
"Boris Ostrovsky" <boris.ostrovsky@...cle.com>,
Stefano Stabellini <sstabellini@...nel.org>,
Marc Zyngier <maz@...nel.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
"Rafael J. Wysocki" <rafael@...nel.org>,
"Megha Dey" <megha.dey@...el.com>,
Dave Jiang <dave.jiang@...el.com>,
Alex Williamson <alex.williamson@...hat.com>,
Jacob Pan <jacob.jun.pan@...el.com>,
Baolu Lu <baolu.lu@...el.com>,
Kevin Tian <kevin.tian@...el.com>,
Dan Williams <dan.j.williams@...el.com>
Subject: REGRESSION: Re: [patch V2 00/46] x86, PCI, XEN, genirq ...: Prepare
for device MSI
On Wed, Aug 26, 2020 at 01:16:28PM +0200, Thomas Gleixner wrote:
> This is the second version of providing a base to support device MSI (non
> PCI based) and on top of that support for IMS (Interrupt Message Storm)
> based devices in a halfways architecture independent way.
Hi Thomas,
Our test team has been struggling with a regression on bare metal
SRIOV VFs since -rc1 that they were able to bisect to this series
This commit tests good:
5712c3ed549e ("Merge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc")
This commit tests bad:
981aa1d366bf ("PCI: MSI: Fix Kconfig dependencies for PCI_MSI_ARCH_FALLBACKS")
They were unable to bisect further into the series because some of the
interior commits don't boot :(
When we try to load the mlx5 driver on a bare metal VF it gets this:
[Thu Oct 22 08:54:51 2020] DMAR: DRHD: handling fault status reg 2
[Thu Oct 22 08:54:51 2020] DMAR: [INTR-REMAP] Request device [42:00.2] fault index 1600 [fault reason 37] Blocked a compatibility format interrupt request
[Thu Oct 22 08:55:04 2020] mlx5_core 0000:42:00.1 eth4: Link down
[Thu Oct 22 08:55:11 2020] mlx5_core 0000:42:00.1 eth4: Link up
[Thu Oct 22 08:55:54 2020] mlx5_core 0000:42:00.2: mlx5_cmd_eq_recover:264:(pid 3390): Recovered 1 EQEs on cmd_eq
[Thu Oct 22 08:55:54 2020] mlx5_core 0000:42:00.2: wait_func_handle_exec_timeout:1051:(pid 3390): cmd0: CREATE_EQ(0Ã301) recovered after timeout
[Thu Oct 22 08:55:54 2020] DMAR: DRHD: handling fault status reg 102
[Thu Oct 22 08:55:54 2020] DMAR: [INTR-REMAP] Request device [42:00.2] fault index 1600 [fault reason 37] Blocked a compatibility format interrupt request
If you have any idea Ziyad and Itay can run any debugging you like.
I suppose it is because this series is handing out compatability
addr/data pairs while the IOMMU is setup to only accept remap ones
from SRIOV VFs?
Thanks,
Jason
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