From: "Jörg Rödel" <joro@8bytes.org>
To: Paul Menzel <pmenzel+linux-iommu@molgen.mpg.de>
Cc: iommu@lists.linux-foundation.org,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: MSI B350M MORTAR: `AMD-Vi: Unable to write to IOMMU perf counter.` and `pci 0000:00:00.2: can't derive routing for PCI INT A`
Date: Fri, 20 Jul 2018 14:31:53 +0200 [thread overview]
Message-ID: <20180720123153.GC18541@8bytes.org> (raw)
In-Reply-To: <605ca165-0071-eb7f-4c0d-b1e76ddd0e05@molgen.mpg.de>
Hi Paul,
On Tue, Jul 17, 2018 at 06:02:07PM +0200, Paul Menzel wrote:
> $ dmesg
> […]
> [ 0.145696] calling pci_iommu_init+0x0/0x3f @ 1
> [ 0.145719] AMD-Vi: Unable to write to IOMMU perf counter.
This is likely a firmware issue. Either the IVRS ACPI table is incorrect
or the BIOS did not enable the performance counter feature in the IOMMU
hardware. Are you running on the latest BIOS?
Joerg
next prev parent reply other threads:[~2018-07-20 12:31 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-17 16:02 MSI B350M MORTAR: `AMD-Vi: Unable to write to IOMMU perf counter.` and `pci 0000:00:00.2: can't derive routing for PCI INT A` Paul Menzel
2018-07-20 12:31 ` Jörg Rödel [this message]
[not found] ` <20180720123153.GC18541-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2018-07-23 10:09 ` Paul Menzel
[not found] ` <d2c5ee4a-e72b-672e-ae30-7b3cd5a43c63-KUpvgZVWgV9o1qOY/usvUg@public.gmane.org>
2018-07-27 8:27 ` Jörg Rödel
2018-07-27 9:18 ` Paul Menzel
2018-07-27 10:27 ` Jörg Rödel
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