Re: [Xen-devel] [PATCH 0/3] x86/xen: support booting PVH guest via standard boot path
On 11/08/2017 08:40 AM, Juergen Gross wrote: > On 08/11/17 14:37, Boris Ostrovsky wrote: >> 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. > Sure, but using e.g. grub in this case would be an alternative. For Dom0 > this alternative isn't existing. So this entry is mandatory, not a "nice > to have". Right, I was just pointing out that the way the message is phrased makes it sounds (to me at least) as if dom0 is the only reason for the dedicated entry point. -boris ___ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
Re: [Xen-devel] [PATCH 0/3] x86/xen: support booting PVH guest via standard boot path
On 08/11/17 14:37, Boris Ostrovsky wrote: > 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. Sure, but using e.g. grub in this case would be an alternative. For Dom0 this alternative isn't existing. So this entry is mandatory, not a "nice to have". Juergen ___ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
Re: [Xen-devel] [PATCH 0/3] x86/xen: support booting PVH guest via standard boot path
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(-) > ___ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
[Xen-devel] [PATCH 0/3] x86/xen: support booting PVH guest via standard boot path
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. 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(-) -- 2.12.3 ___ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
