On Mon, Feb 06, 2023, Oliver Upton wrote:
+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.
What do CI systems do for HugeTLB and THP? Those are the other config options I can think of where there are very interesting interactions from a KVM perspective, but where KVM doesn't have a strict dependency on the feature.
E.g. x86_64_defconfig selects CONFIG_HUGETLBFS=y, but I don't see anything for THP, and AFAICT TRANSPARENT_HUGEPAGE is default=n.
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 :)
All yours.
Reviewed-by: Sean Christopherson seanjc@google.com