[PATCH RFC v4 43/44] KVM: selftests: Update pre-fault test to work with per-guest_memfd attributes

Ackerley Tng
2026-03-26T22:25:53Z

From: Sean Christopherson <seanjc@google.com>

Skip setting memory to private in the pre-fault memory test when using
per-gmem memory attributes, as memory is initialized to private by default
for guest_memfd, and using vm_mem_set_private() on a guest_memfd instance
requires creating guest_memfd with GUEST_MEMFD_FLAG_MMAP (which is totally
doable, but would need to be conditional and is ultimately unnecessary).

Signed-off-by: Sean Christopherson <seanjc@google.com>
---
tools/testing/selftests/kvm/pre_fault_memory_test.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/kvm/pre_fault_memory_test.c b/tools/testing/selftests/kvm/pre_fault_memory_test.c
index 3b2c4179d42ee..7b7352487fe12 100644
--- a/tools/testing/selftests/kvm/pre_fault_memory_test.c
+++ b/tools/testing/selftests/kvm/pre_fault_memory_test.c
@@ -187,7 +187,7 @@ static void __test_pre_fault_memory(unsigned long vm_type, bool private)
TEST_NPAGES, private ? KVM_MEM_GUEST_MEMFD : 0);
virt_map(vm, gva, gpa, TEST_NPAGES);

- if (private)
+ if (!kvm_has_gmem_attributes && private)
vm_mem_set_private(vm, gpa, TEST_SIZE, 0);

pre_fault_memory(vcpu, gpa, 0, SZ_2M, 0, private);

--
2.53.0.1018.g2bb0e51243-goog