Re: [PATCH v3 00/66] KVM: arm64: ARMv8.3/8.4 Nested Virtualization support

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On Thu, 04 Feb 2021 07:51:37 +0000,
Haibo Xu <haibo.xu@xxxxxxxxxx> wrote:
> 
> Kindly ping!
> 
> On Thu, 21 Jan 2021 at 11:03, Haibo Xu <haibo.xu@xxxxxxxxxx> wrote:
> >
> > Re-send in case the previous email was blocked for the inlined hyper-link.
> >
> > Hi Marc,
> >
> > I have tried to enable the NV support in Qemu, and now I can
> > successfully boot a L2 guest
> > in Qemu KVM mode.
> >
> > This patch series looks good from the Qemu side except for two minor
> > requirements:
> > (1) Qemu will check whether a feature was supported by the KVM cap
> > when the user tries to enable it in the command line, so a new
> > capability was prefered for the NV(KVM_CAP_ARM_NV?).

I have added KVM_CAP_ARM_EL2 (rather than NV) to that effect.

> > (2) According to the Documentation/virt/kvm/api.rst, userspace can
> > call KVM_ARM_VCPU_INIT multiple times for a given vcpu, but the
> > kvm_vcpu_init_nested() do have some issue when called multiple
> > times(please refer to the detailed comments in patch 63)

This is now fixed, I believe.

I have pushed out a branch [1] that addresses all the reported
issues, though it currently lack some testing. Please let me know if
it works for you.

Thanks,

	M.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git/log/?h=kvm-arm64/nv-5.12-WIP

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