linux-kernel - [RFC PATCH v1 36/37] KVM: selftests: Update pre-fault test to work with per-guest

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Message-ID: <ab7645218a87a45b0f3214a07138d3c8eadd3164.1760731772.git.ackerleytng@google.com>
Date: Fri, 17 Oct 2025 13:12:17 -0700
From: Ackerley Tng <ackerleytng@...gle.com>
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Subject: [RFC PATCH v1 36/37] KVM: selftests: Update pre-fault test to work
 with per-guest_memfd attributes

From: Sean Christopherson <seanjc@...gle.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@...gle.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 6db75946a4f89..6bb5e52f6d948 100644
--- a/tools/testing/selftests/kvm/pre_fault_memory_test.c
+++ b/tools/testing/selftests/kvm/pre_fault_memory_test.c
@@ -188,7 +188,7 @@ static void __test_pre_fault_memory(unsigned long vm_type, bool private)
 				    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);
 
 	pre_fault_memory(vcpu, gpa, 0, SZ_2M, 0, private);
-- 
2.51.0.858.gf9c4a03a3a-goog