kvm: selftests: stop lying to aarch64 tests about PA-bits

Let's add the 40 PA-bit versions of the VM modes, that AArch64
should have been using, so we can extend the dirty log test without
breaking things.
Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

tools/testing/selftests/kvm/dirty_log_test.c

@@ -230,9 +230,11 @@ static void run_test(enum vm_guest_mode mode, unsigned long iterations,
 
 	switch (mode) {
 	case VM_MODE_P52V48_4K:
+	case VM_MODE_P40V48_4K:
 		guest_page_shift = 12;
 		break;
 	case VM_MODE_P52V48_64K:
+	case VM_MODE_P40V48_64K:
 		guest_page_shift = 16;
 		break;
 	default:
@@ -317,11 +319,16 @@ static struct vm_guest_modes {
 	bool supported;
 	bool enabled;
 } vm_guest_modes[NUM_VM_MODES] = {
+#if defined(__x86_64__)
 	{ VM_MODE_P52V48_4K,	1, 1, },
-#ifdef __aarch64__
-	{ VM_MODE_P52V48_64K,	1, 1, },
-#else
 	{ VM_MODE_P52V48_64K,	0, 0, },
+	{ VM_MODE_P40V48_4K,	0, 0, },
+	{ VM_MODE_P40V48_64K,	0, 0, },
+#elif defined(__aarch64__)
+	{ VM_MODE_P52V48_4K,	0, 0, },
+	{ VM_MODE_P52V48_64K,	0, 0, },
+	{ VM_MODE_P40V48_4K,	1, 1, },
+	{ VM_MODE_P40V48_64K,	1, 1, },
 #endif
 };
 

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

@@ -36,6 +36,8 @@ typedef uint64_t vm_vaddr_t; /* Virtual Machine (Guest) virtual address */
 enum vm_guest_mode {
 	VM_MODE_P52V48_4K,
 	VM_MODE_P52V48_64K,
+	VM_MODE_P40V48_4K,
+	VM_MODE_P40V48_64K,
 	NUM_VM_MODES,
 };
 

tools/testing/selftests/kvm/lib/aarch64/processor.c

@@ -275,6 +275,14 @@ void vcpu_setup(struct kvm_vm *vm, int vcpuid, int pgd_memslot, int gdt_memslot)
 		tcr_el1 |= 1ul << 14; /* TG0 = 64KB */
 		tcr_el1 |= 6ul << 32; /* IPS = 52 bits */
 		break;
+	case VM_MODE_P40V48_4K:
+		tcr_el1 |= 0ul << 14; /* TG0 = 4KB */
+		tcr_el1 |= 2ul << 32; /* IPS = 40 bits */
+		break;
+	case VM_MODE_P40V48_64K:
+		tcr_el1 |= 1ul << 14; /* TG0 = 64KB */
+		tcr_el1 |= 2ul << 32; /* IPS = 40 bits */
+		break;
 	default:
 		TEST_ASSERT(false, "Unknown guest mode, mode: 0x%x", vm->mode);
 	}

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

@@ -99,6 +99,8 @@ static void vm_open(struct kvm_vm *vm, int perm)
 const char * const vm_guest_mode_string[] = {
 	"PA-bits:52, VA-bits:48, 4K pages",
 	"PA-bits:52, VA-bits:48, 64K pages",
+	"PA-bits:40, VA-bits:48, 4K pages",
+	"PA-bits:40, VA-bits:48, 64K pages",
 };
 
 /*
@@ -146,6 +148,20 @@ struct kvm_vm *vm_create(enum vm_guest_mode mode, uint64_t phy_pages, int perm)
 		vm->page_shift = 16;
 		vm->va_bits = 48;
 		break;
+	case VM_MODE_P40V48_4K:
+		vm->pgtable_levels = 4;
+		vm->pa_bits = 40;
+		vm->va_bits = 48;
+		vm->page_size = 0x1000;
+		vm->page_shift = 12;
+		break;
+	case VM_MODE_P40V48_64K:
+		vm->pgtable_levels = 3;
+		vm->pa_bits = 40;
+		vm->va_bits = 48;
+		vm->page_size = 0x10000;
+		vm->page_shift = 16;
+		break;
 	default:
 		TEST_ASSERT(false, "Unknown guest mode, mode: 0x%x", mode);
 	}