Re: [PATCH RESEND v2 0/6] target/arm: Add nested virtualization support

[Andrew Jones]

On Thu, Apr 01, 2021 at 05:55:32AM -0700, Haibo Xu wrote:
> v2:
>   - Move the NV to a CPU feature flag(Andrea&Andrew)
>   - Add CPU feature 'el2' test(Andrew)
> 
> Many thanks to Andrea and Andrew for their comments!
> 
> This series add support for ARMv8.3/8.4 nested virtualization support
> in KVM mode. It's based on Marc Zyngier's kernel KVM patches[1], and 
> has been tested on a FVP model to run a L2 guest with Qemu. Now the 
> feature can be enabled by "-M virt,accel=kvm -cpu host,el2=on" when
> starting a VM. 
> 
> [1] 
> https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git/log/?h=kvm-arm64/nv-5.12-WIP
> 
> Haibo Xu (6):
>   Update linux header with new arm64 NV macro
>   target/arm/kvm: Add helper to detect el2 when using KVM
>   target/arm/kvm: Add an option to turn on/off el2 support
>   hw/intc/arm_gicv3: Enable support for setting vGIC maintenance IRQ
>   target/arm/cpu: Enable 'el2' to work with host/max cpu
>   target/arm: Add vCPU feature 'el2' test.

Hi Haibo,

Thank you for this new feature.

Please also update docs/system/arm/cpu-features.rst in the next version of
this patch series.

Thanks,
drew