1 /* 2 * QEMU ARM Xen PVH Machine 3 * 4 * SPDX-License-Identifier: MIT 5 */ 6 7 #include "qemu/osdep.h" 8 #include "qemu/error-report.h" 9 #include "qapi/qapi-commands-migration.h" 10 #include "qapi/visitor.h" 11 #include "hw/boards.h" 12 #include "hw/irq.h" 13 #include "hw/sysbus.h" 14 #include "sysemu/block-backend.h" 15 #include "sysemu/tpm_backend.h" 16 #include "sysemu/sysemu.h" 17 #include "hw/xen/xen-hvm-common.h" 18 #include "sysemu/tpm.h" 19 #include "hw/xen/arch_hvm.h" 20 #include "trace.h" 21 22 #define TYPE_XEN_ARM MACHINE_TYPE_NAME("xenpvh") 23 OBJECT_DECLARE_SIMPLE_TYPE(XenArmState, XEN_ARM) 24 25 static const MemoryListener xen_memory_listener = { 26 .region_add = xen_region_add, 27 .region_del = xen_region_del, 28 .log_start = NULL, 29 .log_stop = NULL, 30 .log_sync = NULL, 31 .log_global_start = NULL, 32 .log_global_stop = NULL, 33 .priority = MEMORY_LISTENER_PRIORITY_ACCEL, 34 }; 35 36 struct XenArmState { 37 /*< private >*/ 38 MachineState parent; 39 40 XenIOState *state; 41 42 struct { 43 uint64_t tpm_base_addr; 44 } cfg; 45 }; 46 47 static MemoryRegion ram_lo, ram_hi; 48 49 /* 50 * VIRTIO_MMIO_DEV_SIZE is imported from tools/libs/light/libxl_arm.c under Xen 51 * repository. 52 * 53 * Origin: git://xenbits.xen.org/xen.git 2128143c114c 54 */ 55 #define VIRTIO_MMIO_DEV_SIZE 0x200 56 57 #define NR_VIRTIO_MMIO_DEVICES \ 58 (GUEST_VIRTIO_MMIO_SPI_LAST - GUEST_VIRTIO_MMIO_SPI_FIRST) 59 60 static void xen_set_irq(void *opaque, int irq, int level) 61 { 62 if (xendevicemodel_set_irq_level(xen_dmod, xen_domid, irq, level)) { 63 error_report("xendevicemodel_set_irq_level failed"); 64 } 65 } 66 67 static void xen_create_virtio_mmio_devices(XenArmState *xam) 68 { 69 int i; 70 71 for (i = 0; i < NR_VIRTIO_MMIO_DEVICES; i++) { 72 hwaddr base = GUEST_VIRTIO_MMIO_BASE + i * VIRTIO_MMIO_DEV_SIZE; 73 qemu_irq irq = qemu_allocate_irq(xen_set_irq, NULL, 74 GUEST_VIRTIO_MMIO_SPI_FIRST + i); 75 76 sysbus_create_simple("virtio-mmio", base, irq); 77 78 trace_xen_create_virtio_mmio_devices(i, 79 GUEST_VIRTIO_MMIO_SPI_FIRST + i, 80 base); 81 } 82 } 83 84 static void xen_init_ram(MachineState *machine) 85 { 86 MemoryRegion *sysmem = get_system_memory(); 87 ram_addr_t block_len, ram_size[GUEST_RAM_BANKS]; 88 89 trace_xen_init_ram(machine->ram_size); 90 if (machine->ram_size <= GUEST_RAM0_SIZE) { 91 ram_size[0] = machine->ram_size; 92 ram_size[1] = 0; 93 block_len = GUEST_RAM0_BASE + ram_size[0]; 94 } else { 95 ram_size[0] = GUEST_RAM0_SIZE; 96 ram_size[1] = machine->ram_size - GUEST_RAM0_SIZE; 97 block_len = GUEST_RAM1_BASE + ram_size[1]; 98 } 99 100 memory_region_init_ram(&xen_memory, NULL, "xen.ram", block_len, 101 &error_fatal); 102 103 memory_region_init_alias(&ram_lo, NULL, "xen.ram.lo", &xen_memory, 104 GUEST_RAM0_BASE, ram_size[0]); 105 memory_region_add_subregion(sysmem, GUEST_RAM0_BASE, &ram_lo); 106 if (ram_size[1] > 0) { 107 memory_region_init_alias(&ram_hi, NULL, "xen.ram.hi", &xen_memory, 108 GUEST_RAM1_BASE, ram_size[1]); 109 memory_region_add_subregion(sysmem, GUEST_RAM1_BASE, &ram_hi); 110 } 111 112 /* Setup support for grants. */ 113 memory_region_init_ram(&xen_grants, NULL, "xen.grants", block_len, 114 &error_fatal); 115 memory_region_add_subregion(sysmem, XEN_GRANT_ADDR_OFF, &xen_grants); 116 } 117 118 #ifdef CONFIG_TPM 119 static void xen_enable_tpm(XenArmState *xam) 120 { 121 Error *errp = NULL; 122 DeviceState *dev; 123 SysBusDevice *busdev; 124 125 TPMBackend *be = qemu_find_tpm_be("tpm0"); 126 if (be == NULL) { 127 error_report("Couldn't find tmp0 backend"); 128 return; 129 } 130 dev = qdev_new(TYPE_TPM_TIS_SYSBUS); 131 object_property_set_link(OBJECT(dev), "tpmdev", OBJECT(be), &errp); 132 object_property_set_str(OBJECT(dev), "tpmdev", be->id, &errp); 133 busdev = SYS_BUS_DEVICE(dev); 134 sysbus_realize_and_unref(busdev, &error_fatal); 135 sysbus_mmio_map(busdev, 0, xam->cfg.tpm_base_addr); 136 137 trace_xen_enable_tpm(xam->cfg.tpm_base_addr); 138 } 139 #endif 140 141 static void xen_arm_init(MachineState *machine) 142 { 143 XenArmState *xam = XEN_ARM(machine); 144 145 xam->state = g_new0(XenIOState, 1); 146 147 if (machine->ram_size == 0) { 148 warn_report("%s: ram size not specified. QEMU machine started" 149 " without IOREQ (no emulated devices including virtio)", 150 MACHINE_CLASS(object_get_class(OBJECT(machine)))->desc); 151 return; 152 } 153 154 xen_init_ram(machine); 155 156 xen_register_ioreq(xam->state, machine->smp.max_cpus, &xen_memory_listener); 157 158 xen_create_virtio_mmio_devices(xam); 159 160 #ifdef CONFIG_TPM 161 if (xam->cfg.tpm_base_addr) { 162 xen_enable_tpm(xam); 163 } else { 164 warn_report("tpm-base-addr is not provided. TPM will not be enabled"); 165 } 166 #endif 167 } 168 169 #ifdef CONFIG_TPM 170 static void xen_arm_get_tpm_base_addr(Object *obj, Visitor *v, 171 const char *name, void *opaque, 172 Error **errp) 173 { 174 XenArmState *xam = XEN_ARM(obj); 175 uint64_t value = xam->cfg.tpm_base_addr; 176 177 visit_type_uint64(v, name, &value, errp); 178 } 179 180 static void xen_arm_set_tpm_base_addr(Object *obj, Visitor *v, 181 const char *name, void *opaque, 182 Error **errp) 183 { 184 XenArmState *xam = XEN_ARM(obj); 185 uint64_t value; 186 187 if (!visit_type_uint64(v, name, &value, errp)) { 188 return; 189 } 190 191 xam->cfg.tpm_base_addr = value; 192 } 193 #endif 194 195 static void xen_arm_machine_class_init(ObjectClass *oc, void *data) 196 { 197 198 MachineClass *mc = MACHINE_CLASS(oc); 199 mc->desc = "Xen PVH ARM machine"; 200 mc->init = xen_arm_init; 201 202 /* 203 * mc->max_cpus holds the MAX value allowed in the -smp command-line opts. 204 * 205 * 1. If users don't pass any -smp option: 206 * ms->smp.cpus will default to 1. 207 * ms->smp.max_cpus will default to 1. 208 * 209 * 2. If users pass -smp X: 210 * ms->smp.cpus will be set to X. 211 * ms->smp.max_cpus will also be set to X. 212 * 213 * 3. If users pass -smp X,maxcpus=Y: 214 * ms->smp.cpus will be set to X. 215 * ms->smp.max_cpus will be set to Y. 216 * 217 * In scenarios 2 and 3, if X or Y are set to something larger than 218 * mc->max_cpus, QEMU will bail out with an error message. 219 */ 220 mc->max_cpus = GUEST_MAX_VCPUS; 221 mc->default_machine_opts = "accel=xen"; 222 /* Set explicitly here to make sure that real ram_size is passed */ 223 mc->default_ram_size = 0; 224 225 #ifdef CONFIG_TPM 226 object_class_property_add(oc, "tpm-base-addr", "uint64_t", 227 xen_arm_get_tpm_base_addr, 228 xen_arm_set_tpm_base_addr, 229 NULL, NULL); 230 object_class_property_set_description(oc, "tpm-base-addr", 231 "Set Base address for TPM device."); 232 233 machine_class_allow_dynamic_sysbus_dev(mc, TYPE_TPM_TIS_SYSBUS); 234 #endif 235 } 236 237 static const TypeInfo xen_arm_machine_type = { 238 .name = TYPE_XEN_ARM, 239 .parent = TYPE_MACHINE, 240 .class_init = xen_arm_machine_class_init, 241 .instance_size = sizeof(XenArmState), 242 }; 243 244 static void xen_arm_machine_register_types(void) 245 { 246 type_register_static(&xen_arm_machine_type); 247 } 248 249 type_init(xen_arm_machine_register_types) 250