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[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.
>>> 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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