On 04/05/2018 08:19 AM, Juergen Gross wrote: > On 05/04/18 12:06, George Dunlap wrote: > >> Aren't there flags in the binary somewhere that could tell the >> toolstack / Xen whether the kernel in question needs the RSDP table in >> lowmem, or whether it can be put higher? > Not really. Analyzing the binary whether it accesses the rsdp_addr in > the start_info isn't the way to go, IMO. > > I've sent a patch to xen-devel adding a quirk flag to the domain's > config to enable the admin special casing such an "old" kernel. Can we backport latest struct hvm_start_info changes (which bumped interface version) to 4.11 and pass RSDP only for versions >=1? -boris