KVM: selftests: Drop @slot0_mem_pages from __vm_create_with_vcpus()

All callers of __vm_create_with_vcpus() pass DEFAULT_GUEST_PHY_PAGES for
@slot_mem_pages; drop the param and just hardcode the "default" as the
base number of pages for slot0.
Signed-off-by: NSean Christopherson <seanjc@google.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

tools/testing/selftests/kvm/include/kvm_util_base.h

@@ -561,18 +561,15 @@ static inline struct kvm_vm *vm_create(uint64_t nr_pages)
 	return __vm_create(VM_MODE_DEFAULT, nr_pages);
 }
 
-/* Like vm_create_default_with_vcpus, but accepts mode and slot0 memory as a parameter */
 struct kvm_vm *__vm_create_with_vcpus(enum vm_guest_mode mode, uint32_t nr_vcpus,
-				      uint64_t slot0_mem_pages, uint64_t extra_mem_pages,
-				      uint32_t num_percpu_pages, void *guest_code,
-				      struct kvm_vcpu *vcpus[]);
+				      uint64_t extra_mem_pages, uint32_t num_percpu_pages,
+				      void *guest_code, struct kvm_vcpu *vcpus[]);
 
 static inline struct kvm_vm *vm_create_with_vcpus(uint32_t nr_vcpus,
 						  void *guest_code,
 						  struct kvm_vcpu *vcpus[])
 {
-	return __vm_create_with_vcpus(VM_MODE_DEFAULT, nr_vcpus,
-				      DEFAULT_GUEST_PHY_PAGES, 0, 0,
+	return __vm_create_with_vcpus(VM_MODE_DEFAULT, nr_vcpus, 0, 0,
 				      guest_code, vcpus);
 }
 

tools/testing/selftests/kvm/kvm_page_table_test.c

@@ -254,9 +254,8 @@ static struct kvm_vm *pre_init_before_test(enum vm_guest_mode mode, void *arg)
 
 	/* Create a VM with enough guest pages */
 	guest_num_pages = test_mem_size / guest_page_size;
-	vm = __vm_create_with_vcpus(mode, nr_vcpus, DEFAULT_GUEST_PHY_PAGES,
-				    guest_num_pages, 0, guest_code,
-				    test_args.vcpus);
+	vm = __vm_create_with_vcpus(mode, nr_vcpus, guest_num_pages, 0,
+				    guest_code, test_args.vcpus);
 
 	/* Align down GPA of the testing memslot */
 	if (!p->phys_offset)

tools/testing/selftests/kvm/lib/kvm_util.c

@@ -280,7 +280,6 @@ struct kvm_vm *__vm_create(enum vm_guest_mode mode, uint64_t nr_pages)
  * Input Args:
  *   mode - VM Mode (e.g. VM_MODE_P52V48_4K)
  *   nr_vcpus - VCPU count
- *   slot0_mem_pages - Slot0 physical memory size
  *   extra_mem_pages - Non-slot0 physical memory total size
  *   num_percpu_pages - Per-cpu physical memory pages
  *   guest_code - Guest entry point
@@ -291,15 +290,13 @@ struct kvm_vm *__vm_create(enum vm_guest_mode mode, uint64_t nr_pages)
  * Return:
  *   Pointer to opaque structure that describes the created VM.
  *
- * Creates a VM with the mode specified by mode (e.g. VM_MODE_P52V48_4K),
- * with customized slot0 memory size, at least 512 pages currently.
+ * Creates a VM with the mode specified by mode (e.g. VM_MODE_P52V48_4K).
  * extra_mem_pages is only used to calculate the maximum page table size,
  * no real memory allocation for non-slot0 memory in this function.
  */
 struct kvm_vm *__vm_create_with_vcpus(enum vm_guest_mode mode, uint32_t nr_vcpus,
-				      uint64_t slot0_mem_pages, uint64_t extra_mem_pages,
-				      uint32_t num_percpu_pages, void *guest_code,
-				      struct kvm_vcpu *vcpus[])
+				      uint64_t extra_mem_pages, uint32_t num_percpu_pages,
+				      void *guest_code, struct kvm_vcpu *vcpus[])
 {
 	uint64_t vcpu_pages, extra_pg_pages, pages;
 	struct kvm_vm *vm;
@@ -307,10 +304,6 @@ struct kvm_vm *__vm_create_with_vcpus(enum vm_guest_mode mode, uint32_t nr_vcpus
 
 	TEST_ASSERT(!nr_vcpus || vcpus, "Must provide vCPU array");
 
-	/* Force slot0 memory size not small than DEFAULT_GUEST_PHY_PAGES */
-	if (slot0_mem_pages < DEFAULT_GUEST_PHY_PAGES)
-		slot0_mem_pages = DEFAULT_GUEST_PHY_PAGES;
-
 	/* The maximum page table size for a memory region will be when the
 	 * smallest pages are used. Considering each page contains x page
 	 * table descriptors, the total extra size for page tables (for extra
@@ -318,8 +311,8 @@ struct kvm_vm *__vm_create_with_vcpus(enum vm_guest_mode mode, uint32_t nr_vcpus
 	 * than N/x*2.
 	 */
 	vcpu_pages = (DEFAULT_STACK_PGS + num_percpu_pages) * nr_vcpus;
-	extra_pg_pages = (slot0_mem_pages + extra_mem_pages + vcpu_pages) / PTES_PER_MIN_PAGE * 2;
-	pages = slot0_mem_pages + vcpu_pages + extra_pg_pages;
+	extra_pg_pages = (DEFAULT_GUEST_PHY_PAGES + extra_mem_pages + vcpu_pages) / PTES_PER_MIN_PAGE * 2;
+	pages = DEFAULT_GUEST_PHY_PAGES + vcpu_pages + extra_pg_pages;
 
 	TEST_ASSERT(nr_vcpus <= kvm_check_cap(KVM_CAP_MAX_VCPUS),
 		    "nr_vcpus = %d too large for host, max-vcpus = %d",
@@ -340,8 +333,8 @@ struct kvm_vm *__vm_create_with_one_vcpu(struct kvm_vcpu **vcpu,
 	struct kvm_vcpu *vcpus[1];
 	struct kvm_vm *vm;
 
-	vm = __vm_create_with_vcpus(VM_MODE_DEFAULT, 1, DEFAULT_GUEST_PHY_PAGES,
-				    extra_mem_pages, 0, guest_code, vcpus);
+	vm = __vm_create_with_vcpus(VM_MODE_DEFAULT, 1, extra_mem_pages, 0,
+				    guest_code, vcpus);
 
 	*vcpu = vcpus[0];
 	return vm;

tools/testing/selftests/kvm/lib/perf_test_util.c

@@ -113,7 +113,7 @@ struct kvm_vm *perf_test_create_vm(enum vm_guest_mode mode, int nr_vcpus,
 {
 	struct perf_test_args *pta = &perf_test_args;
 	struct kvm_vm *vm;
-	uint64_t guest_num_pages, slot0_pages = DEFAULT_GUEST_PHY_PAGES;
+	uint64_t guest_num_pages, slot0_pages = 0;
 	uint64_t backing_src_pagesz = get_backing_src_pagesz(backing_src);
 	uint64_t region_end_gfn;
 	int i;
@@ -152,8 +152,7 @@ struct kvm_vm *perf_test_create_vm(enum vm_guest_mode mode, int nr_vcpus,
 	 * The memory is also added to memslot 0, but that's a benign side
 	 * effect as KVM allows aliasing HVAs in meslots.
 	 */
-	vm = __vm_create_with_vcpus(mode, nr_vcpus, DEFAULT_GUEST_PHY_PAGES,
-				    slot0_pages + guest_num_pages, 0,
+	vm = __vm_create_with_vcpus(mode, nr_vcpus, slot0_pages + guest_num_pages, 0,
 				    perf_test_guest_code, vcpus);
 
 	pta->vm = vm;