From: Rajat Jain via iommu <iommu@lists.linux-foundation.org>
To: "Raj, Ashok" <ashok.raj@intel.com>
Cc: Joerg Roedel <jroedel@suse.de>, Sagi Grimberg <sagi@grimberg.me>,
linux-pci <linux-pci@vger.kernel.org>,
linux-nvme@lists.infradead.org, Jens Axboe <axboe@fb.com>,
Lalithambika Krishnakumar <lalithambika.krishnakumar@intel.com>,
"open list:AMD IOMMU \(AMD-VI\)"
<iommu@lists.linux-foundation.org>,
Kai-Heng Feng <kai.heng.feng@canonical.com>,
Bjorn Helgaas <helgaas@kernel.org>,
Keith Busch <kbusch@kernel.org>,
Mika Westerberg <mika.westerberg@linux.intel.com>,
Christoph Hellwig <hch@lst.de>
Subject: Re: [bugzilla-daemon@bugzilla.kernel.org: [Bug 209149] New: "iommu/vt-d: Enable PCI ACS for platform opt in hint" makes NVMe config space not accessible after S3]
Date: Wed, 23 Sep 2020 12:45:11 -0700 [thread overview]
Message-ID: <CACK8Z6HkPBXeRnzeK9TdBSkJOPx=Q775065RRqeaa3XWajuZQw@mail.gmail.com> (raw)
In-Reply-To: <20200923161944.GA17764@otc-nc-03>
On Wed, Sep 23, 2020 at 9:19 AM Raj, Ashok <ashok.raj@intel.com> wrote:
>
> Hi Bjorn
>
>
> On Wed, Sep 23, 2020 at 11:03:27AM -0500, Bjorn Helgaas wrote:
> > [+cc IOMMU and NVMe folks]
> >
> > Sorry, I forgot to forward this to linux-pci when it was first
> > reported.
> >
> > Apparently this happens with v5.9-rc3, and may be related to
> > 50310600ebda ("iommu/vt-d: Enable PCI ACS for platform opt in hint"),
> > which appeared in v5.8-rc3.
> >
> > There are several dmesg logs and proposed patches in the bugzilla, but
> > no analysis yet of what the problem is. From the first dmesg
> > attachment (https://bugzilla.kernel.org/attachment.cgi?id=292327):
>
> We have been investigating this internally as well. It appears maybe the
> specupdate for Cometlake is missing the errata documention. The offsets
> were wrong in some of them, and if its the same issue its likely cause.
Can you please also confirm if errata applies to Tigerlake ?
Thanks,
Rajat
>
> Will nudge the hw folks to hunt that down :-(.
>
> Cheers,
> Ashok
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next prev parent reply other threads:[~2020-09-23 19:45 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-23 16:03 [bugzilla-daemon@bugzilla.kernel.org: [Bug 209149] New: "iommu/vt-d: Enable PCI ACS for platform opt in hint" makes NVMe config space not accessible after S3] Bjorn Helgaas
2020-09-23 16:19 ` Raj, Ashok
2020-09-23 19:45 ` Rajat Jain via iommu [this message]
2020-09-24 20:03 ` Raj, Ashok
2020-09-23 16:31 ` Kai-Heng Feng
2020-09-24 18:09 ` Raj, Ashok
2020-09-24 19:39 ` Alex Williamson
2020-09-24 19:44 ` Raj, Ashok
2020-09-25 6:35 ` Kai-Heng Feng
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