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38ccc50ac0
Add tests for NUMA memory policy binding and NUMA aware allocation in
guest_memfd. This extends the existing selftests by adding proper
validation for:
- KVM GMEM set_policy and get_policy() vm_ops functionality using
mbind() and get_mempolicy()
- NUMA policy application before and after memory allocation
Run the NUMA mbind() test with and without INIT_SHARED, as KVM should allow
doing mbind(), madvise(), etc. on guest-private memory, e.g. so that
userspace can set NUMA policy for CoCo VMs.
Run the NUMA allocation test only for INIT_SHARED, i.e. if the host can't
fault-in memory (via direct access, madvise(), etc.) as move_pages()
returns -ENOENT if the page hasn't been faulted in (walks the host page
tables to find the associated folio)
[sean: don't skip entire test when running on non-NUMA system, test mbind()
with private memory, provide more info in assert messages]
Signed-off-by: Shivank Garg <shivankg@amd.com>
Tested-by: Ashish Kalra <ashish.kalra@amd.com>
Link: https://lore.kernel.org/r/20251016172853.52451-12-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>