Re: [Xen-devel] [PATCH v13 0/4] add per-domain IOMMU control

[Oleksandr <olekstysh@xxxxxxxxx>]

On 25.09.19 19:03, Paul Durrant wrote:

Hi, Paul

> > Subject: Re: [Xen-devel] [PATCH v13 0/4] add per-domain IOMMU control
> >
> >
> > [CC Julien]
> >
> >
> > Hi Paul
> >
> > I may mistake, but looks like
> >
> > 80ff3d338dc93260b41ffeeebb0f852c2edef9ce iommu: tidy up
> > iommu_use_hap_pt() and need_iommu_pt_sync() macros
> >
> > triggers ASSERT_UNREACHABLE on Arm if no IOMMU has been found (I built
> > with my platform's IOMMU driver disabled: # CONFIG_IPMMU_VMSA is not set) .
> >
> > So, iommu_setup() calls clear_iommu_hap_pt_share() with
> > iommu_hap_pt_share being set (CONFIG_IOMMU_FORCE_PT_SHARE=y) which,
> > actually, triggers ASSERT.
> BTW, I assume disabling the iommu on the xen command like will work round the 
> issue?
No. Disabling the iommu will lead to ASSERT in all cases.

--
Regards,

Oleksandr Tyshchenko


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