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Re: [PATCH] VT-d: fix caching mode IOTLB flushing

On 19/08/2021 09:05, Jan Beulich wrote:
While for context cache entry flushing use of did 0 is indeed correct
(after all upon reading the context entry the IOMMU wouldn't know any
domain ID if the entry is not present, and hence a surrogate one needs
to be used), for IOTLB entries the normal domain ID (from the [present]
context entry) gets used. See sub-section "IOTLB" of section "Address
Translation Caches" in the VT-d spec.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

Reviewed-by: Paul Durrant <paul@xxxxxxx>



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