Re: [PATCH v5 00/10] selftests: kvm: s390: Add s390x ucontrol selftests

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On 8/7/24 5:45 PM, Christoph Schlameuss wrote:
This patch series adds a selftest suite to validate the s390x
architecture specific ucontrol KVM interface.

When creating a VM on s390x it is possible to create it as userspace
controlled VM or in short ucontrol VM.
These VMs delegates the management of the VM to userspace instead
of handling most events within the kernel. Consequently the userspace
has to manage interrupts, memory allocation etc.

Before this patch set this functionality lacks any public test cases.
It is desirable to add test cases for this interface to be able to
reduce the risk of breaking changes in the future.

In order to provision a ucontrol VM the kernel needs to be compiled with
the CONFIG_KVM_S390_UCONTROL enabled. The users with sys_admin capability
can then create a new ucontrol VM providing the KVM_VM_S390_UCONTROL
parameter to the KVM_CREATE_VM ioctl.

The kernels existing selftest helper functions can only be partially be
reused for these tests.

I've picked up patches #1-6 and 10 to get some testing in and make the series smaller.





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