Re: [PATCH v5 1/2] s390x/pci: add support for guests that request direct mapping

2025-02-27 Thread David Hildenbrand
On 26.02.25 22:00, Matthew Rosato wrote: When receiving a guest mpcifc(4) or mpcifc(6) instruction without the T bit set, treat this as a request to perform direct mapping instead of address translation. In order to facilitate this, pin the entirety of guest memory into the host iommu. Pinning

[PATCH v5 1/2] s390x/pci: add support for guests that request direct mapping

2025-02-26 Thread Matthew Rosato
When receiving a guest mpcifc(4) or mpcifc(6) instruction without the T bit set, treat this as a request to perform direct mapping instead of address translation. In order to facilitate this, pin the entirety of guest memory into the host iommu. Pinning for the direct mapping case is handled via