Signed-off-by: Ackerley Tng <ackerleytng@xxxxxxxxxx>
---
tools/testing/selftests/kvm/Makefile | 1 +
.../kvm/x86_64/private_mem_migrate_tests.c | 87 +++++++++++++++++++
2 files changed, 88 insertions(+)
create mode 100644 tools/testing/selftests/kvm/x86_64/private_mem_migrate_tests.c
diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile
index cb9450022302..d348ff56c92b 100644
--- a/tools/testing/selftests/kvm/Makefile
+++ b/tools/testing/selftests/kvm/Makefile
@@ -82,6 +82,7 @@ TEST_GEN_PROGS_x86_64 += x86_64/platform_info_test
TEST_GEN_PROGS_x86_64 += x86_64/pmu_event_filter_test
TEST_GEN_PROGS_x86_64 += x86_64/private_mem_conversions_test
TEST_GEN_PROGS_x86_64 += x86_64/private_mem_kvm_exits_test
+TEST_GEN_PROGS_x86_64 += x86_64/private_mem_migrate_tests
TEST_GEN_PROGS_x86_64 += x86_64/set_boot_cpu_id
TEST_GEN_PROGS_x86_64 += x86_64/set_sregs_test
TEST_GEN_PROGS_x86_64 += x86_64/smaller_maxphyaddr_emulation_test
diff --git a/tools/testing/selftests/kvm/x86_64/private_mem_migrate_tests.c b/tools/testing/selftests/kvm/x86_64/private_mem_migrate_tests.c
new file mode 100644
index 000000000000..4226de3ebd41
--- /dev/null
+++ b/tools/testing/selftests/kvm/x86_64/private_mem_migrate_tests.c
@@ -0,0 +1,87 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "kvm_util_base.h"
+#include "test_util.h"
+#include "ucall_common.h"
+#include <linux/kvm.h>
+#include <linux/sizes.h>
+
+#define TRANSFER_PRIVATE_MEM_TEST_SLOT 10
+#define TRANSFER_PRIVATE_MEM_GPA ((uint64_t)(1ull << 32))
+#define TRANSFER_PRIVATE_MEM_GVA TRANSFER_PRIVATE_MEM_GPA
+#define TRANSFER_PRIVATE_MEM_VALUE 0xdeadbeef
+
+static void transfer_private_mem_guest_code_src(void)
+{
+ uint64_t volatile *const ptr = (uint64_t *)TRANSFER_PRIVATE_MEM_GVA;
+
+ *ptr = TRANSFER_PRIVATE_MEM_VALUE;
+
+ GUEST_SYNC1(*ptr);
+}
+
+static void transfer_private_mem_guest_code_dst(void)
+{
+ uint64_t volatile *const ptr = (uint64_t *)TRANSFER_PRIVATE_MEM_GVA;
+
+ GUEST_SYNC1(*ptr);
+}
+
+static void test_transfer_private_mem(void)
+{
+ struct kvm_vm *src_vm, *dst_vm;
+ struct kvm_vcpu *src_vcpu, *dst_vcpu;
+ int src_memfd, dst_memfd;
+ struct ucall uc;
+
+ const struct vm_shape shape = {
+ .mode = VM_MODE_DEFAULT,
+ .type = KVM_X86_SW_PROTECTED_VM,
+ };
+
+ /* Build the source VM, use it to write to private memory */
+ src_vm = __vm_create_shape_with_one_vcpu(
+ shape, &src_vcpu, 0, transfer_private_mem_guest_code_src);
+ src_memfd = vm_create_guest_memfd(src_vm, SZ_4K, 0);
+
+ vm_mem_add(src_vm, DEFAULT_VM_MEM_SRC, TRANSFER_PRIVATE_MEM_GPA,
+ TRANSFER_PRIVATE_MEM_TEST_SLOT, 1, KVM_MEM_PRIVATE,
+ src_memfd, 0);
+
+ virt_map(src_vm, TRANSFER_PRIVATE_MEM_GVA, TRANSFER_PRIVATE_MEM_GPA, 1);
+ vm_set_memory_attributes(src_vm, TRANSFER_PRIVATE_MEM_GPA, SZ_4K,
+ KVM_MEMORY_ATTRIBUTE_PRIVATE);
+
+ vcpu_run(src_vcpu);
+ TEST_ASSERT_KVM_EXIT_REASON(src_vcpu, KVM_EXIT_IO);
+ get_ucall(src_vcpu, &uc);
+ TEST_ASSERT(uc.args[0] == TRANSFER_PRIVATE_MEM_VALUE,
+ "Source VM should be able to write to private memory");
+
+ /* Build the destination VM with linked fd */
+ dst_vm = __vm_create_shape_with_one_vcpu(
+ shape, &dst_vcpu, 0, transfer_private_mem_guest_code_dst);
+ dst_memfd = vm_link_guest_memfd(dst_vm, src_memfd, 0);
+
+ vm_mem_add(dst_vm, DEFAULT_VM_MEM_SRC, TRANSFER_PRIVATE_MEM_GPA,
+ TRANSFER_PRIVATE_MEM_TEST_SLOT, 1, KVM_MEM_PRIVATE,
+ dst_memfd, 0);
+
+ virt_map(dst_vm, TRANSFER_PRIVATE_MEM_GVA, TRANSFER_PRIVATE_MEM_GPA, 1);
+ vm_set_memory_attributes(dst_vm, TRANSFER_PRIVATE_MEM_GPA, SZ_4K,
+ KVM_MEMORY_ATTRIBUTE_PRIVATE);
+
+ vcpu_run(dst_vcpu);
+ TEST_ASSERT_KVM_EXIT_REASON(dst_vcpu, KVM_EXIT_IO);
+ get_ucall(dst_vcpu, &uc);
+ TEST_ASSERT(uc.args[0] == TRANSFER_PRIVATE_MEM_VALUE,
+ "Destination VM should be able to read value transferred");
+}
+
+int main(int argc, char *argv[])
+{
+ TEST_REQUIRE(kvm_check_cap(KVM_CAP_VM_TYPES) & BIT(KVM_X86_SW_PROTECTED_VM));
+
+ test_transfer_private_mem();
+
+ return 0;
+}
--
2.41.0.640.ga95def55d0-goog
