x86/HVM: assume default ioreq servers follow new bufioreq pointer access model There's no way for Xen to know or for such a qemu to tell us. Signed-off-by: Jan Beulich --- RFC: This implies only patched qemu-trad or ioreq-server-aware qemu-upstream get used with xen-unstable. Is this reasonable? --- a/xen/arch/x86/hvm/hvm.c +++ b/xen/arch/x86/hvm/hvm.c @@ -1040,7 +1040,7 @@ static int hvm_ioreq_server_init(struct if ( rc ) return rc; - if ( bufioreq_handling == HVM_IOREQSRV_BUFIOREQ_ATOMIC ) + if ( bufioreq_handling == HVM_IOREQSRV_BUFIOREQ_ATOMIC || is_default ) s->bufioreq_atomic = 1; rc = hvm_ioreq_server_setup_pages(