On Fri, 04 Sep 2026 15:55:12 +0800, Yu Zhang <[email protected]> wrote: > Add page-selective IOTLB flush using HVCALL_FLUSH_DEVICE_DOMAIN_LIST. > This hypercall accepts a list of (page_number, page_mask_shift) entries, > enabling finer-grained IOTLB invalidation compared to the domain-wide > HVCALL_FLUSH_DEVICE_DOMAIN used by hv_iommu_flush_iotlb_all(). > > hv_iommu_calc_flush_range() computes the smallest power-of-two aligned > range that covers the target IOVA region, producing a single flush > descriptor. This may over-flush when the range is not naturally aligned, > matching the approach used by Intel VT-d PSI. If the page-selective > flush fails, the code falls back to a full domain flush. > > [...]
Reviewed-by: Jason Gunthorpe <[email protected]> -- Jason
