linux-kernel - Re: [PATCH] KVM: selftests: Enable USERFAULTFD

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Date:   Mon, 6 Feb 2023 17:09:06 +0000
From:   Oliver Upton <oliver.upton@...ux.dev>
To:     Mark Brown <broonie@...nel.org>
Cc:     Paolo Bonzini <pbonzini@...hat.com>, Shuah Khan <shuah@...nel.org>,
        kvm@...r.kernel.org, linux-kselftest@...r.kernel.org,
        linux-kernel@...r.kernel.org, seanjc@...gle.com,
        anup@...infault.org
Subject: Re: [PATCH] KVM: selftests: Enable USERFAULTFD

+cc x86, riscv as they're also affected.

On Thu, Feb 02, 2023 at 09:01:36PM +0000, Mark Brown wrote:
> The page_fault_test KVM selftest requires userfaultfd but the config
> fragment for the KVM selftests does not enable it, meaning that those tests
> are skipped in CI systems that rely on appropriate settings in the config
> fragments except on S/390 which happens to have it in defconfig. Enable
> the option in the config fragment so that the tests get run.

Thanks for catching this.

I believe we also need UFFD for demand_paging_test, which is used by all
the KVM selftests arches. I plan on picking this up, but if anyone has
objections please shout :)

--
Thanks,
Oliver

> Signed-off-by: Mark Brown <broonie@...nel.org>
> ---
>  tools/testing/selftests/kvm/config | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/tools/testing/selftests/kvm/config b/tools/testing/selftests/kvm/config
> index 63ed533f73d6..d011b38e259e 100644
> --- a/tools/testing/selftests/kvm/config
> +++ b/tools/testing/selftests/kvm/config
> @@ -1,3 +1,4 @@
>  CONFIG_KVM=y
>  CONFIG_KVM_INTEL=y
>  CONFIG_KVM_AMD=y
> +CONFIG_USERFAULTFD=y
> 
> ---
> base-commit: 1b929c02afd37871d5afb9d498426f83432e71c2
> change-id: 20230202-kvm-selftest-userfaultfd-ea85a8b5f873
> 
> Best regards,
> -- 
> Mark Brown <broonie@...nel.org>
> 

-- 
Thanks,
Oliver