[Xen-devel] Re: [pvops xen/next ][iommu] attenpt to passthrough PCI-e usb controllor to PV domU: (XEN) traps.c:2309:d1 Domain attempted WRMSR 000000000000008b from 00000a07:00000000 to 00000000:00000000.

["Jan Beulich" <JBeulich@xxxxxxxxxx>]

>>> Sander Eikelenboom <linux@xxxxxxxxxxxxxx> 22.03.10 11:15 >>>
>Hello Weidong/Konrad,
>
>1) With iommu=0, the DMAR fault is gone (of course), but
>        > (XEN) traps.c:2309:d1 Domain attempted WRMSR 000000000000008b from 
> 00000a07:00000000 to 00000000:00000000.
>        Stays in xm-dmesg, the pv guests is booted, and lspci shows the pci 
> device. But the device doesn't function properly.

This is certainly unrelated to $subject problem - MSR 0x8b is 
MSR_AMD64_PATCH_LEVEL, and is being written by the microcode patch loader.

Jan


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