Re: [PATCH v5 00/11] KVM: PPC: Nested APIv2 guest support

Hi Michal,

Michal Suchánek [off-list ref] writes:

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Hello,

are there any machines on which this is supposed to work?

On a 9105-22A with ML1050_fw1050.20 (78) and

On 9105-22A you need atleast:
Firmware level: FW1060.10

Linux 6.11.0-lp155.4.gce149d2-default I get:

Kernel version is fine. ATM anything >=6.10 is good

[   29.228161] kvm-hv: nestedv2 get capabilities hcall failed, falling back to nestedv1 (rc=-2)
[   29.228168] kvm-hv: Parent hypervisor does not support nesting (rc=-2)

If you are still getting this error after switching to FW1060.10 than
you need to enable KVM mode for the LPAR following instructions here:

https://www.ibm.com/docs/en/linux-on-systems?topic=servers-kvm-in-powervm-lpar#kvm_in_powervm_lpar__title__9

TLDR; Just need to enable 'KVM Mode' in the LPAR configuration from HMC.

Can the hardware requirements be clarified?

Further clarified at
https://www.ibm.com/docs/en/linux-on-systems?topic=servers-kvm-in-powervm-lpar

There is a qemu model based on tcg, that was merged in v9.0.0 some time back via
https://lore.kernel.org/all/20240308111940.1617660-1-harshpb@linux.ibm.com/ (local)

If you want to try this, then following can be helpful in setting up the
environment:
https://github.com/iamjpn/kvm-powervm-test

Thanks

Michal

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-- 
Cheers
~ Vaibhav