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Re: Issue iommu unrecognized on amd computer
- To: oxjo@xxxxxxxxx
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Thu, 1 Feb 2024 11:57:05 +0100
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- Cc: "roger.pau@xxxxxxxxxx" <roger.pau@xxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Thu, 01 Feb 2024 10:57:14 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 01.02.2024 09:16, oxjo@xxxxxxxxx wrote:
> Following our interaction on matrix, I send you the boot log `xl dmesg`
> output of my computer, booting with `iommu=debug` options on linux
> 6.6.13-200.fc39.
There's no "iommu=debug" anywhere in sight:
(XEN) Command line: placeholder no-real-mode edd=off
Did you mistakenly put it on the Linux command line?
Nevertheless there are relevant messages already without the extra
verbosity (and without you using a debug build of Xen, which would
be preferable):
(XEN) AMD-Vi: Warning: IVMD: [c9f1c000,c9f42000) is not (entirely) in reserved
memory
(XEN) AMD-Vi: Error: IVMD: page at c9f1c000 can't be converted
(XEN) AMD-Vi: Error initialization
Quoting the respective entry from the memory map:
(XEN) [00000000c8f58000, 00000000c9f57fff] (ACPI NVS)
Both Roger and I look to agree that this condition we have
if ( !(type & (RAM_TYPE_RESERVED | RAM_TYPE_ACPI |
RAM_TYPE_UNUSABLE)) )
is inverted in some way. We merely need to agree in which way it
wants adjusting.
Jan
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