On 04/07/2016 08:39, Xiao Guangrong wrote: > Why the memory mapped by this mmap() is not a portion of MMIO from > underlayer physical device? If it is a valid system memory, is this > interface > really needed to implemented in vfio? (you at least need to set VM_MIXEDMAP > if it mixed system memory with MMIO) The KVM code does not care if VM_MIXEDMAP is set or not, it works in either case. Paolo > IIUC, the kernel assumes that VM_PFNMAP is a continuous memory, e.g, like > current KVM and vaddr_get_pfn() in vfio, but it seems nvdia's patchset > breaks this semantic as ops->validate_map_request() can adjust the physical > address arbitrarily. (again, the name 'validate' should be changed to match > the thing as it is really doing) > > > -- > To unsubscribe from this list: send the line "unsubscribe kvm" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
