hw/arm/xen_arm.c

   1 /*
   2  * QEMU ARM Xen PVH Machine
   3  *
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a copy
   6  * of this software and associated documentation files (the "Software"), to deal
   7  * in the Software without restriction, including without limitation the rights
   8  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   9  * copies of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be included in
  13  * all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  21  * THE SOFTWARE.
  22  */
  23
  24 #include "qemu/osdep.h"
  25 #include "qemu/error-report.h"
  26 #include "qapi/qapi-commands-migration.h"
  27 #include "qapi/visitor.h"
  28 #include "hw/boards.h"
  29 #include "hw/irq.h"
  30 #include "hw/sysbus.h"
  31 #include "sysemu/block-backend.h"
  32 #include "sysemu/tpm_backend.h"
  33 #include "sysemu/sysemu.h"
  34 #include "hw/xen/xen-hvm-common.h"
  35 #include "sysemu/tpm.h"
  36 #include "hw/xen/arch_hvm.h"
  37
  38 #define TYPE_XEN_ARM  MACHINE_TYPE_NAME("xenpvh")
  39 OBJECT_DECLARE_SIMPLE_TYPE(XenArmState, XEN_ARM)
  40
  41 static const MemoryListener xen_memory_listener = {
  42     .region_add = xen_region_add,
  43     .region_del = xen_region_del,
  44     .log_start = NULL,
  45     .log_stop = NULL,
  46     .log_sync = NULL,
  47     .log_global_start = NULL,
  48     .log_global_stop = NULL,
  49     .priority = MEMORY_LISTENER_PRIORITY_ACCEL,
  50 };
  51
  52 struct XenArmState {
  53     /*< private >*/
  54     MachineState parent;
  55
  56     XenIOState *state;
  57
  58     struct {
  59         uint64_t tpm_base_addr;
  60     } cfg;
  61 };
  62
  63 static MemoryRegion ram_lo, ram_hi;
  64
  65 /*
  66  * VIRTIO_MMIO_DEV_SIZE is imported from tools/libs/light/libxl_arm.c under Xen
  67  * repository.
  68  *
  69  * Origin: git://xenbits.xen.org/xen.git 2128143c114c
  70  */
  71 #define VIRTIO_MMIO_DEV_SIZE   0x200
  72
  73 #define NR_VIRTIO_MMIO_DEVICES   \
  74    (GUEST_VIRTIO_MMIO_SPI_LAST - GUEST_VIRTIO_MMIO_SPI_FIRST)
  75
  76 static void xen_set_irq(void *opaque, int irq, int level)
  77 {
  78     if (xendevicemodel_set_irq_level(xen_dmod, xen_domid, irq, level)) {
  79         error_report("xendevicemodel_set_irq_level failed");
  80     }
  81 }
  82
  83 static void xen_create_virtio_mmio_devices(XenArmState *xam)
  84 {
  85     int i;
  86
  87     for (i = 0; i < NR_VIRTIO_MMIO_DEVICES; i++) {
  88         hwaddr base = GUEST_VIRTIO_MMIO_BASE + i * VIRTIO_MMIO_DEV_SIZE;
  89         qemu_irq irq = qemu_allocate_irq(xen_set_irq, NULL,
  90                                          GUEST_VIRTIO_MMIO_SPI_FIRST + i);
  91
  92         sysbus_create_simple("virtio-mmio", base, irq);
  93
  94         DPRINTF("Created virtio-mmio device %d: irq %d base 0x%lx\n",
  95                 i, GUEST_VIRTIO_MMIO_SPI_FIRST + i, base);
  96     }
  97 }
  98
  99 static void xen_init_ram(MachineState *machine)
 100 {
 101     MemoryRegion *sysmem = get_system_memory();
 102     ram_addr_t block_len, ram_size[GUEST_RAM_BANKS];
 103
 104     if (machine->ram_size <= GUEST_RAM0_SIZE) {
 105         ram_size[0] = machine->ram_size;
 106         ram_size[1] = 0;
 107         block_len = GUEST_RAM0_BASE + ram_size[0];
 108     } else {
 109         ram_size[0] = GUEST_RAM0_SIZE;
 110         ram_size[1] = machine->ram_size - GUEST_RAM0_SIZE;
 111         block_len = GUEST_RAM1_BASE + ram_size[1];
 112     }
 113
 114     memory_region_init_ram(&ram_memory, NULL, "xen.ram", block_len,
 115                            &error_fatal);
 116
 117     memory_region_init_alias(&ram_lo, NULL, "xen.ram.lo", &ram_memory,
 118                              GUEST_RAM0_BASE, ram_size[0]);
 119     memory_region_add_subregion(sysmem, GUEST_RAM0_BASE, &ram_lo);
 120     DPRINTF("Initialized region xen.ram.lo: base 0x%llx size 0x%lx\n",
 121             GUEST_RAM0_BASE, ram_size[0]);
 122
 123     if (ram_size[1] > 0) {
 124         memory_region_init_alias(&ram_hi, NULL, "xen.ram.hi", &ram_memory,
 125                                  GUEST_RAM1_BASE, ram_size[1]);
 126         memory_region_add_subregion(sysmem, GUEST_RAM1_BASE, &ram_hi);
 127         DPRINTF("Initialized region xen.ram.hi: base 0x%llx size 0x%lx\n",
 128                 GUEST_RAM1_BASE, ram_size[1]);
 129     }
 130 }
 131
 132 void arch_handle_ioreq(XenIOState *state, ioreq_t *req)
 133 {
 134     hw_error("Invalid ioreq type 0x%x\n", req->type);
 135
 136     return;
 137 }
 138
 139 void arch_xen_set_memory(XenIOState *state, MemoryRegionSection *section,
 140                          bool add)
 141 {
 142 }
 143
 144 void xen_hvm_modified_memory(ram_addr_t start, ram_addr_t length)
 145 {
 146 }
 147
 148 void qmp_xen_set_global_dirty_log(bool enable, Error **errp)
 149 {
 150 }
 151
 152 #ifdef CONFIG_TPM
 153 static void xen_enable_tpm(XenArmState *xam)
 154 {
 155     Error *errp = NULL;
 156     DeviceState *dev;
 157     SysBusDevice *busdev;
 158
 159     TPMBackend *be = qemu_find_tpm_be("tpm0");
 160     if (be == NULL) {
 161         DPRINTF("Couldn't fine the backend for tpm0\n");
 162         return;
 163     }
 164     dev = qdev_new(TYPE_TPM_TIS_SYSBUS);
 165     object_property_set_link(OBJECT(dev), "tpmdev", OBJECT(be), &errp);
 166     object_property_set_str(OBJECT(dev), "tpmdev", be->id, &errp);
 167     busdev = SYS_BUS_DEVICE(dev);
 168     sysbus_realize_and_unref(busdev, &error_fatal);
 169     sysbus_mmio_map(busdev, 0, xam->cfg.tpm_base_addr);
 170
 171     DPRINTF("Connected tpmdev at address 0x%lx\n", xam->cfg.tpm_base_addr);
 172 }
 173 #endif
 174
 175 static void xen_arm_init(MachineState *machine)
 176 {
 177     XenArmState *xam = XEN_ARM(machine);
 178
 179     xam->state =  g_new0(XenIOState, 1);
 180
 181     if (machine->ram_size == 0) {
 182         DPRINTF("ram_size not specified. QEMU machine started without IOREQ"
 183                 "(no emulated devices including Virtio)\n");
 184         return;
 185     }
 186
 187     xen_init_ram(machine);
 188
 189     xen_register_ioreq(xam->state, machine->smp.cpus, &xen_memory_listener);
 190
 191     xen_create_virtio_mmio_devices(xam);
 192
 193 #ifdef CONFIG_TPM
 194     if (xam->cfg.tpm_base_addr) {
 195         xen_enable_tpm(xam);
 196     } else {
 197         DPRINTF("tpm-base-addr is not provided. TPM will not be enabled\n");
 198     }
 199 #endif
 200 }
 201
 202 #ifdef CONFIG_TPM
 203 static void xen_arm_get_tpm_base_addr(Object *obj, Visitor *v,
 204                                       const char *name, void *opaque,
 205                                       Error **errp)
 206 {
 207     XenArmState *xam = XEN_ARM(obj);
 208     uint64_t value = xam->cfg.tpm_base_addr;
 209
 210     visit_type_uint64(v, name, &value, errp);
 211 }
 212
 213 static void xen_arm_set_tpm_base_addr(Object *obj, Visitor *v,
 214                                       const char *name, void *opaque,
 215                                       Error **errp)
 216 {
 217     XenArmState *xam = XEN_ARM(obj);
 218     uint64_t value;
 219
 220     if (!visit_type_uint64(v, name, &value, errp)) {
 221         return;
 222     }
 223
 224     xam->cfg.tpm_base_addr = value;
 225 }
 226 #endif
 227
 228 static void xen_arm_machine_class_init(ObjectClass *oc, void *data)
 229 {
 230
 231     MachineClass *mc = MACHINE_CLASS(oc);
 232     mc->desc = "Xen Para-virtualized PC";
 233     mc->init = xen_arm_init;
 234     mc->max_cpus = 1;
 235     mc->default_machine_opts = "accel=xen";
 236     /* Set explicitly here to make sure that real ram_size is passed */
 237     mc->default_ram_size = 0;
 238
 239 #ifdef CONFIG_TPM
 240     object_class_property_add(oc, "tpm-base-addr", "uint64_t",
 241                               xen_arm_get_tpm_base_addr,
 242                               xen_arm_set_tpm_base_addr,
 243                               NULL, NULL);
 244     object_class_property_set_description(oc, "tpm-base-addr",
 245                                           "Set Base address for TPM device.");
 246
 247     machine_class_allow_dynamic_sysbus_dev(mc, TYPE_TPM_TIS_SYSBUS);
 248 #endif
 249 }
 250
 251 static const TypeInfo xen_arm_machine_type = {
 252     .name = TYPE_XEN_ARM,
 253     .parent = TYPE_MACHINE,
 254     .class_init = xen_arm_machine_class_init,
 255     .instance_size = sizeof(XenArmState),
 256 };
 257
 258 static void xen_arm_machine_register_types(void)
 259 {
 260     type_register_static(&xen_arm_machine_type);
 261 }
 262
 263 type_init(xen_arm_machine_register_types)