Re: [RFC PATCH 0/5] KVM: arm64: Pass PSCI to userspace

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On Tue, Jun 08, 2021 at 05:48:01PM +0200, Jean-Philippe Brucker wrote:
> Allow userspace to request handling PSCI calls from guests. Our goal is
> to enable a vCPU hot-add solution for Arm where the VMM presents
> possible resources to the guest at boot, and controls which vCPUs can be
> brought up by allowing or denying PSCI CPU_ON calls.

Since it looks like vCPU hot-add will be implemented differently, I don't
intend to resend this series at the moment. But some of it could be
useful for other projects and to avoid the helpful review effort going to
waste, I fixed it up and will leave it on branch
https://jpbrucker.net/git/linux/log/?h=kvm/psci-to-userspace
It now only uses KVM_CAP_EXIT_HYPERCALL introduced in v5.14.

Thanks,
Jean



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