On Mon, 28 Jan 2019 at 12:40, Gerd Hoffmann <kraxel@xxxxxxxxxx> wrote: > The tricky part is the access control here. On physical hardware you > typically have one flash rom, say 16M below 4G (on x86). > > Our pflash device doesn't allow to define multiple regions, so we use > multiple pflash devices instead, each with different access permissions > (code vs. vars). Because of that they are more dynamic than they are on > phyiscal hardware, x86 sizes them according to the size of the firmware > images (arm is easier here, we have fixed size and location no matter > how big the firmware images are). > > So I think the options we have are: > (a) leave pflash as-is, which pretty much implies physaddr and size > must be user-configurable. > (b) add support for multiple regions to pflash, so one can attach > multiple blockdev at different offsets to a single pflash device. The latter makes more sense to me -- we should model what the hardware actually has, because the guest can tell the difference. (Migration compat is left as an exercise for the reader :-)) thanks -- PMM -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list
