Hello Alex, Auger and all, I have a question about the VFIO virtual device BAR.
In vfio_region_setup, it initialize a ‘region->mem’ MR and set its ops to ‘vfio_regions_ops’. In ‘vfio_region_mmap’, it maps the physical device’s MMIO to QEMU’s virtual address space as a raw MR ‘region->mmaps[i].mem’. And also it set the latter MR as a subregion of the first one. So when the guest accesses the BAR, it will direct go to the physical device’s BAR. My question is here: When the qemu will use the ‘vfio_regions_ops’ to read/write the BAR? Also whey in the last of ‘vfio_region_write/read’ we need to call ‘vbasedev->ops->vfio_eoi(vbasedev);’? Thanks, Li Qiang
