On 12/6/18 5:11 PM, Paolo Bonzini wrote: > On 06/12/18 07:04, Maran Wilson wrote: >> +config PVH >> + bool "Support for running PVH guests" >> + ---help--- >> + This option enables the PVH entry point for guest virtual machines >> + as specified in the x86/HVM direct boot ABI. >> + > IIUC this breaks "normal" bzImage boot, so we should have something like > > The resulting kernel will not boot with most x86 boot loaders > such as GRUB Grub support for PVH guests (for Xen) is well under way. > or SYSLINUX. Unless you plan to start the kernel > using QEMU or Xen, you probably want to say N here. I think PVH should not be user-selectable at all. It should be selected by either XEN_PVH or KVM_GUEST_PVH (which you suggested to drop). > > and also > > depends on !EFI > > because even though in principle it would be possible to write a PVH > loader for UEFI, PVH's start info does not support the EFI handover > protocol. But we should be able to build the binary with both EFI and PVH? -boris
