[PATCH v10 28/41] KVM: selftests: Test conversion flow when INIT_SHARED
From: Ackerley Tng via B4 Relay <devnull+ackerleytng.google.com@kernel.org>
Date: 2026-08-07 21:52:50
Also in:
b4-sent, kvm, linux-coco, linux-doc, linux-kselftest, linux-mm, lkml
Subsystem:
kernel selftest framework, kernel virtual machine (kvm), kernel virtual machine for x86 (kvm/x86), the rest · Maintainers:
Shuah Khan, Shuah Khan, Paolo Bonzini, Sean Christopherson, Linus Torvalds
From: Ackerley Tng <redacted> Add a test case to verify that conversions between private and shared memory work correctly when the memory is initially created as shared. Co-developed-by: Sean Christopherson <seanjc@google.com> Signed-off-by: Sean Christopherson <seanjc@google.com> Reviewed-by: Fuad Tabba <redacted> Tested-by: Shivank Garg <redacted> Signed-off-by: Ackerley Tng <redacted> --- .../selftests/kvm/x86/guest_memfd_conversions_test.c | 13 +++++++++++++ 1 file changed, 13 insertions(+)
diff --git a/tools/testing/selftests/kvm/x86/guest_memfd_conversions_test.c b/tools/testing/selftests/kvm/x86/guest_memfd_conversions_test.c
index 77f95d49349ce..4c20d3d8e9349 100644
--- a/tools/testing/selftests/kvm/x86/guest_memfd_conversions_test.c
+++ b/tools/testing/selftests/kvm/x86/guest_memfd_conversions_test.c@@ -97,6 +97,12 @@ static void __gmem_conversions_##test(test_data_t *t, int nr_pages) \ #define GMEM_CONVERSION_TEST_INIT_PRIVATE(test) \ __GMEM_CONVERSION_TEST_INIT_PRIVATE(test, 1) +#define __GMEM_CONVERSION_TEST_INIT_SHARED(test, __nr_pages) \ + GMEM_CONVERSION_TEST(test, __nr_pages, GUEST_MEMFD_FLAG_INIT_SHARED) + +#define GMEM_CONVERSION_TEST_INIT_SHARED(test) \ + __GMEM_CONVERSION_TEST_INIT_SHARED(test, 1) + struct guest_check_data { void *mem; char expected_val;
@@ -188,6 +194,13 @@ GMEM_CONVERSION_TEST_INIT_PRIVATE(init_private) test_convert_to_private(t, 0, 'C', 'E'); } +GMEM_CONVERSION_TEST_INIT_SHARED(init_shared) +{ + test_shared(t, 0, 0, 'A', 'B'); + test_convert_to_private(t, 0, 'B', 'C'); + test_convert_to_shared(t, 0, 'C', 'D', 'E'); +} + int main(int argc, char *argv[]) { TEST_REQUIRE(kvm_check_cap(KVM_CAP_VM_TYPES) & BIT(KVM_X86_SW_PROTECTED_VM));
--
2.55.0.654.g21b8a5bc05-goog