RE: [Xen-devel] x2apic mode vs. interrupt remapping

["Jan Beulich" <JBeulich@xxxxxxxxxx>]

>>> "Zhang, Xiantao" <xiantao.zhang@xxxxxxxxx> 03.03.10 14:32 >>>
>According to the #Cset20168, x2apic is only enabled when all VT-d
>engines support IR and EIM support, so the policy should be same
>with Linux's.

I would say that c/s has the intended behavior you describe, but since
iommu_setup() runs after enable_x2apic(), the call to
iommu_supports_eim() still returns true (iommu_enabled, iommu_qinval,
and iommu_inremap all have an initial value of 1, and with no drhd
present the function returns 1.

Jan


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