1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 2020, Red Hat, Inc. 4 */ 5 #include "guest_modes.h" 6 7 struct guest_mode guest_modes[NUM_VM_MODES]; 8 9 void guest_modes_append_default(void) 10 { 11 guest_mode_append(VM_MODE_DEFAULT, true, true); 12 13 #ifdef __aarch64__ 14 guest_mode_append(VM_MODE_P40V48_64K, true, true); 15 { 16 unsigned int limit = kvm_check_cap(KVM_CAP_ARM_VM_IPA_SIZE); 17 if (limit >= 52) 18 guest_mode_append(VM_MODE_P52V48_64K, true, true); 19 if (limit >= 48) { 20 guest_mode_append(VM_MODE_P48V48_4K, true, true); 21 guest_mode_append(VM_MODE_P48V48_64K, true, true); 22 } 23 } 24 #endif 25 #ifdef __s390x__ 26 { 27 int kvm_fd, vm_fd; 28 struct kvm_s390_vm_cpu_processor info; 29 30 kvm_fd = open_kvm_dev_path_or_exit(); 31 vm_fd = ioctl(kvm_fd, KVM_CREATE_VM, 0); 32 kvm_device_access(vm_fd, KVM_S390_VM_CPU_MODEL, 33 KVM_S390_VM_CPU_PROCESSOR, &info, false); 34 close(vm_fd); 35 close(kvm_fd); 36 /* Starting with z13 we have 47bits of physical address */ 37 if (info.ibc >= 0x30) 38 guest_mode_append(VM_MODE_P47V64_4K, true, true); 39 } 40 #endif 41 #ifdef __riscv 42 { 43 unsigned int sz = kvm_check_cap(KVM_CAP_VM_GPA_BITS); 44 45 if (sz >= 52) 46 guest_mode_append(VM_MODE_P52V48_4K, true, true); 47 if (sz >= 48) 48 guest_mode_append(VM_MODE_P48V48_4K, true, true); 49 } 50 #endif 51 } 52 53 void for_each_guest_mode(void (*func)(enum vm_guest_mode, void *), void *arg) 54 { 55 int i; 56 57 for (i = 0; i < NUM_VM_MODES; ++i) { 58 if (!guest_modes[i].enabled) 59 continue; 60 TEST_ASSERT(guest_modes[i].supported, 61 "Guest mode ID %d (%s) not supported.", 62 i, vm_guest_mode_string(i)); 63 func(i, arg); 64 } 65 } 66 67 void guest_modes_help(void) 68 { 69 int i; 70 71 printf(" -m: specify the guest mode ID to test\n" 72 " (default: test all supported modes)\n" 73 " This option may be used multiple times.\n" 74 " Guest mode IDs:\n"); 75 for (i = 0; i < NUM_VM_MODES; ++i) { 76 printf(" %d: %s%s\n", i, vm_guest_mode_string(i), 77 guest_modes[i].supported ? " (supported)" : ""); 78 } 79 } 80 81 void guest_modes_cmdline(const char *arg) 82 { 83 static bool mode_selected; 84 unsigned int mode; 85 int i; 86 87 if (!mode_selected) { 88 for (i = 0; i < NUM_VM_MODES; ++i) 89 guest_modes[i].enabled = false; 90 mode_selected = true; 91 } 92 93 mode = strtoul(optarg, NULL, 10); 94 TEST_ASSERT(mode < NUM_VM_MODES, "Guest mode ID %d too big", mode); 95 guest_modes[mode].enabled = true; 96 } 97