Messages in this thread | ![/](/images/icornerl.gif) | | Date | Mon, 13 Mar 2023 09:56:55 +0100 | Subject | Re: [RFC PATCH 1/5] x86/xen: disable swiotlb for xen pvh | From | Jan Beulich <> |
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On 12.03.2023 13:01, Huang Rui wrote: > Xen PVH is the paravirtualized mode and takes advantage of hardware > virtualization support when possible. It will using the hardware IOMMU > support instead of xen-swiotlb, so disable swiotlb if current domain is > Xen PVH.
But the kernel has no way (yet) to drive the IOMMU, so how can it get away without resorting to swiotlb in certain cases (like I/O to an address-restricted device)?
Jan
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