Re: IOMMU and AMD 890fx

[Andre Przywara <andre.przywara@amd.com>]

Jens Krehbiel-Gräther wrote:
> Hi!
> 
> I now got a Asus Crosshair IV mainboard and here are the outputs after I 
> enabled the IOMMU option in the bios:
> 
> xen-01:~# ls /sys/firmware/acpi/tables/
> APIC  DSDT  dynamic  FACP  FACS  HPET  IVRS  MCFG  OEMB  SRAT  SSDT
> xen-01:~# dmesg |grep -i iommu
> [    1.691432] AMD-Vi: Enabling IOMMU at 0000:00:00.2 cap 0x40
> xen-01:~# lspci -d 1002:5a23
> 00:00.2 Generic system peripheral [0806]: ATI Technologies Inc Device 5a23
> xen-01:~#
> 
> So here is the IOMMU of the 890FX. Will go further for testing now..

Great news, thanks for pursuing that.

For the other boards:
We have identified an issue and are working on a solution. Stay tuned.

Also please note that sometimes board vendors also call the AMD64 GART 
an IOMMU, so if you have correspondence with them, make sure you are 
talking about the same thing.

Regards,
Andre.

-- 
Andre Przywara
AMD-Operating System Research Center (OSRC), Dresden, Germany
Tel: +49 351 448 3567 12
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