Re: [PATCH v5 0/5] ARM Nested Virt Support

[Marc Zyngier <maz@kernel.org>]

On Tue, 27 May 2025 12:40:35 +0100,
Miguel Luis <miguel.luis@oracle.com> wrote:
> 
> Hi Marc,
> 
> > On 27 May 2025, at 07:39, Marc Zyngier <maz@kernel.org> wrote:
> > 
> > Hi Eric,
> > 
> > On Tue, 27 May 2025 07:24:32 +0100,
> > Eric Auger <eric.auger@redhat.com> wrote:
> >> 
> >> Now that ARM nested virt has landed in kvm/next, let's turn the series
> >> into a PATCH series. The linux header update was made against kvm/next.
> >> 
> >> For gaining virt functionality in KVM accelerated L1, The host needs to
> >> be booted with "kvm-arm.mode=nested" option and qemu needs to be invoked
> >> with: -machine virt,virtualization=on.
> > 
> > Thanks for respinning this series.
> > 
> > Do you have any plan to support the non-VHE version of the NV support
> > (as advertised by KVM_CAP_ARM_EL2_E2H0)? It would allow running lesser
> > hypervisors (such as *cough* Xen *cough*), which completely rely on
> > HCR_EL2.E2H being 0?
> > 
> 
> Something that pops up is early_kvm_mode_cfg trying to handle nested mode
> while KVM_ARM_VCPU_HAS_EL2_E2H0 is set.

Care to elaborate?

	M.

-- 
Without deviation from the norm, progress is not possible.