From: "Raj, Ashok" <ashok.raj@intel.com>
To: Bjorn Helgaas <helgaas@kernel.org>
Cc: Joerg Roedel <jroedel@suse.de>, Sagi Grimberg <sagi@grimberg.me>,
linux-pci@vger.kernel.org, linux-nvme@lists.infradead.org,
Jens Axboe <axboe@fb.com>,
Lalithambika Krishnakumar <lalithambika.krishnakumar@intel.com>,
iommu@lists.linux-foundation.org,
Kai-Heng Feng <kai.heng.feng@canonical.com>,
Keith Busch <kbusch@kernel.org>, Ashok Raj <ashok.raj@intel.com>,
Rajat Jain <rajatja@google.com>,
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 09:19:44 -0700 [thread overview]
Message-ID: <20200923161944.GA17764@otc-nc-03> (raw)
In-Reply-To: <20200923160327.GA2267374@bjorn-Precision-5520>
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.
Will nudge the hw folks to hunt that down :-(.
Cheers,
Ashok
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next prev parent reply other threads:[~2020-09-23 16:19 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 [this message]
2020-09-23 19:45 ` Rajat Jain via iommu
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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