On 11/08/2017 04:07 AM, Juergen Gross wrote: > Booting a Xen PVH guest requires a special boot entry as it is > mandatory to setup some Xen-specific interfaces rather early. When grub > or OVMF are used as boot loaders, however, those will fill the boot > parameters in zeropage and there is no longer a need to do something > PVH specific in the early boot path. > > This patch series adds support for that scenario by identifying PVH > environment and doing the required init steps via Xen hooks instead of > using a dedicated boot entry. > > The dedicated entry is still needed for support of Dom0 running in PVH > mode as in this case there is no grub or OVMF involved for filling in > the boot parameters. We are going to continue supporting direct boot of unprivileged guests too so this entry point will be needed not for dom0 only. -boris > > Juergen Gross (3): > x86/acpi: add test for ACPI_FADT_NO_VGA > x86: add guest_late_init hook to hypervisor_x86 structure > x86/xen: use guest_late_init to detect Xen PVH guest > > arch/x86/include/asm/hypervisor.h | 11 +++++++++++ > arch/x86/include/asm/kvm_para.h | 2 -- > arch/x86/include/asm/x86_init.h | 1 + > arch/x86/kernel/acpi/boot.c | 5 +++++ > arch/x86/kernel/kvm.c | 3 ++- > arch/x86/kernel/setup.c | 2 +- > arch/x86/xen/enlighten_hvm.c | 24 ++++++++++++++++++++++-- > arch/x86/xen/enlighten_pvh.c | 9 --------- > 8 files changed, 42 insertions(+), 15 deletions(-) >
