[PATCH 1/2] KVM: selftests: Extract memslot setup code from spawn_vm()

[Yohei Kojima <yohei.kojima@sony.com>]

Add vm_userspace_mem_region_add_map() function to set up memslot, and
update spawn_vm() to use it. This helps the test cases to create
additional memslots easily.

Signed-off-by: Yohei Kojima <yohei.kojima@sony.com>
---
 .../selftests/kvm/set_memory_region_test.c    | 47 ++++++++++++-------
 1 file changed, 29 insertions(+), 18 deletions(-)

diff --git a/tools/testing/selftests/kvm/set_memory_region_test.c b/tools/testing/selftests/kvm/set_memory_region_test.c
index 7fe427ff9b38..8d4fd713347c 100644
--- a/tools/testing/selftests/kvm/set_memory_region_test.c
+++ b/tools/testing/selftests/kvm/set_memory_region_test.c
@@ -107,31 +107,42 @@ static void wait_for_vcpu(void)
 	usleep(100000);
 }
 
+static void vm_userspace_mem_region_add_map(struct kvm_vm *vm,
+		uint64_t addr, uint32_t slot, size_t size, uint32_t flags)
+{
+	uint64_t *hva;
+	uint64_t gpa;
+
+	vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS_THP,
+				    addr, slot,
+				    size / getpagesize(), flags);
+
+	/*
+	 * Allocate and map two pages so that the GPA accessed by guest_code()
+	 * stays valid across the memslot move.
+	 */
+	gpa = vm_phy_pages_alloc(vm, 2, addr, slot);
+	TEST_ASSERT(gpa == addr, "Failed vm_phy_pages_alloc\n");
+
+	virt_map(vm, addr, addr, 2);
+
+	/* Ditto for the host mapping so that both pages can be zeroed. */
+	hva = addr_gpa2hva(vm, MEM_REGION_GPA);
+	memset(hva, 0, 2 * 4096);
+}
+
 static struct kvm_vm *spawn_vm(struct kvm_vcpu **vcpu, pthread_t *vcpu_thread,
 			       void *guest_code)
 {
 	struct kvm_vm *vm;
-	uint64_t *hva;
-	uint64_t gpa;
 
 	vm = vm_create_with_one_vcpu(vcpu, guest_code);
 
-	vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS_THP,
-				    MEM_REGION_GPA, MEM_REGION_SLOT,
-				    MEM_REGION_SIZE / getpagesize(), 0);
-
-	/*
-	 * Allocate and map two pages so that the GPA accessed by guest_code()
-	 * stays valid across the memslot move.
-	 */
-	gpa = vm_phy_pages_alloc(vm, 2, MEM_REGION_GPA, MEM_REGION_SLOT);
-	TEST_ASSERT(gpa == MEM_REGION_GPA, "Failed vm_phy_pages_alloc\n");
-
-	virt_map(vm, MEM_REGION_GPA, MEM_REGION_GPA, 2);
-
-	/* Ditto for the host mapping so that both pages can be zeroed. */
-	hva = addr_gpa2hva(vm, MEM_REGION_GPA);
-	memset(hva, 0, 2 * 4096);
+	vm_userspace_mem_region_add_map(vm,
+					MEM_REGION_GPA,
+					MEM_REGION_SLOT,
+					MEM_REGION_SIZE,
+					0);
 
 	pthread_create(vcpu_thread, NULL, vcpu_worker, *vcpu);
 
-- 
2.43.0