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     xendevicemodel_set_irq_level(xen_dmod, xen_domid, irq, level);
  79 }
  80
  81 static void xen_create_virtio_mmio_devices(XenArmState *xam)
  82 {
  83     int i;
  84
  85     for (i = 0; i < NR_VIRTIO_MMIO_DEVICES; i++) {
  86         hwaddr base = GUEST_VIRTIO_MMIO_BASE + i * VIRTIO_MMIO_DEV_SIZE;
  87         qemu_irq irq = qemu_allocate_irq(xen_set_irq, NULL,
  88                                          GUEST_VIRTIO_MMIO_SPI_FIRST + i);
  89
  90         sysbus_create_simple("virtio-mmio", base, irq);
  91
  92         DPRINTF("Created virtio-mmio device %d: irq %d base 0x%lx\n",
  93                 i, GUEST_VIRTIO_MMIO_SPI_FIRST + i, base);
  94     }
  95 }
  96
  97 static void xen_init_ram(MachineState *machine)
  98 {
  99     MemoryRegion *sysmem = get_system_memory();
 100     ram_addr_t block_len, ram_size[GUEST_RAM_BANKS];
 101
 102     if (machine->ram_size <= GUEST_RAM0_SIZE) {
 103         ram_size[0] = machine->ram_size;
 104         ram_size[1] = 0;
 105         block_len = GUEST_RAM0_BASE + ram_size[0];
 106     } else {
 107         ram_size[0] = GUEST_RAM0_SIZE;
 108         ram_size[1] = machine->ram_size - GUEST_RAM0_SIZE;
 109         block_len = GUEST_RAM1_BASE + ram_size[1];
 110     }
 111
 112     memory_region_init_ram(&ram_memory, NULL, "xen.ram", block_len,
 113                            &error_fatal);
 114
 115     memory_region_init_alias(&ram_lo, NULL, "xen.ram.lo", &ram_memory,
 116                              GUEST_RAM0_BASE, ram_size[0]);
 117     memory_region_add_subregion(sysmem, GUEST_RAM0_BASE, &ram_lo);
 118     DPRINTF("Initialized region xen.ram.lo: base 0x%llx size 0x%lx\n",
 119             GUEST_RAM0_BASE, ram_size[0]);
 120
 121     if (ram_size[1] > 0) {
 122         memory_region_init_alias(&ram_hi, NULL, "xen.ram.hi", &ram_memory,
 123                                  GUEST_RAM1_BASE, ram_size[1]);
 124         memory_region_add_subregion(sysmem, GUEST_RAM1_BASE, &ram_hi);
 125         DPRINTF("Initialized region xen.ram.hi: base 0x%llx size 0x%lx\n",
 126                 GUEST_RAM1_BASE, ram_size[1]);
 127     }
 128 }
 129
 130 void arch_handle_ioreq(XenIOState *state, ioreq_t *req)
 131 {
 132     hw_error("Invalid ioreq type 0x%x\n", req->type);
 133
 134     return;
 135 }
 136
 137 void arch_xen_set_memory(XenIOState *state, MemoryRegionSection *section,
 138                          bool add)
 139 {
 140 }
 141
 142 void xen_hvm_modified_memory(ram_addr_t start, ram_addr_t length)
 143 {
 144 }
 145
 146 void qmp_xen_set_global_dirty_log(bool enable, Error **errp)
 147 {
 148 }
 149
 150 #ifdef CONFIG_TPM
 151 static void xen_enable_tpm(XenArmState *xam)
 152 {
 153     Error *errp = NULL;
 154     DeviceState *dev;
 155     SysBusDevice *busdev;
 156
 157     TPMBackend *be = qemu_find_tpm_be("tpm0");
 158     if (be == NULL) {
 159         DPRINTF("Couldn't fine the backend for tpm0\n");
 160         return;
 161     }
 162     dev = qdev_new(TYPE_TPM_TIS_SYSBUS);
 163     object_property_set_link(OBJECT(dev), "tpmdev", OBJECT(be), &errp);
 164     object_property_set_str(OBJECT(dev), "tpmdev", be->id, &errp);
 165     busdev = SYS_BUS_DEVICE(dev);
 166     sysbus_realize_and_unref(busdev, &error_fatal);
 167     sysbus_mmio_map(busdev, 0, xam->cfg.tpm_base_addr);
 168
 169     DPRINTF("Connected tpmdev at address 0x%lx\n", xam->cfg.tpm_base_addr);
 170 }
 171 #endif
 172
 173 static void xen_arm_init(MachineState *machine)
 174 {
 175     XenArmState *xam = XEN_ARM(machine);
 176
 177     xam->state =  g_new0(XenIOState, 1);
 178
 179     if (machine->ram_size == 0) {
 180         DPRINTF("ram_size not specified. QEMU machine started without IOREQ"
 181                 "(no emulated devices including Virtio)\n");
 182         return;
 183     }
 184
 185     xen_init_ram(machine);
 186
 187     xen_register_ioreq(xam->state, machine->smp.cpus, &xen_memory_listener);
 188
 189     xen_create_virtio_mmio_devices(xam);
 190
 191 #ifdef CONFIG_TPM
 192     if (xam->cfg.tpm_base_addr) {
 193         xen_enable_tpm(xam);
 194     } else {
 195         DPRINTF("tpm-base-addr is not provided. TPM will not be enabled\n");
 196     }
 197 #endif
 198 }
 199
 200 #ifdef CONFIG_TPM
 201 static void xen_arm_get_tpm_base_addr(Object *obj, Visitor *v,
 202                                       const char *name, void *opaque,
 203                                       Error **errp)
 204 {
 205     XenArmState *xam = XEN_ARM(obj);
 206     uint64_t value = xam->cfg.tpm_base_addr;
 207
 208     visit_type_uint64(v, name, &value, errp);
 209 }
 210
 211 static void xen_arm_set_tpm_base_addr(Object *obj, Visitor *v,
 212                                       const char *name, void *opaque,
 213                                       Error **errp)
 214 {
 215     XenArmState *xam = XEN_ARM(obj);
 216     uint64_t value;
 217
 218     if (!visit_type_uint64(v, name, &value, errp)) {
 219         return;
 220     }
 221
 222     xam->cfg.tpm_base_addr = value;
 223 }
 224 #endif
 225
 226 static void xen_arm_machine_class_init(ObjectClass *oc, void *data)
 227 {
 228
 229     MachineClass *mc = MACHINE_CLASS(oc);
 230     mc->desc = "Xen Para-virtualized PC";
 231     mc->init = xen_arm_init;
 232     mc->max_cpus = 1;
 233     mc->default_machine_opts = "accel=xen";
 234     /* Set explicitly here to make sure that real ram_size is passed */
 235     mc->default_ram_size = 0;
 236
 237 #ifdef CONFIG_TPM
 238     object_class_property_add(oc, "tpm-base-addr", "uint64_t",
 239                               xen_arm_get_tpm_base_addr,
 240                               xen_arm_set_tpm_base_addr,
 241                               NULL, NULL);
 242     object_class_property_set_description(oc, "tpm-base-addr",
 243                                           "Set Base address for TPM device.");
 244
 245     machine_class_allow_dynamic_sysbus_dev(mc, TYPE_TPM_TIS_SYSBUS);
 246 #endif
 247 }
 248
 249 static const TypeInfo xen_arm_machine_type = {
 250     .name = TYPE_XEN_ARM,
 251     .parent = TYPE_MACHINE,
 252     .class_init = xen_arm_machine_class_init,
 253     .instance_size = sizeof(XenArmState),
 254 };
 255
 256 static void xen_arm_machine_register_types(void)
 257 {
 258     type_register_static(&xen_arm_machine_type);
 259 }
 260
 261 type_init(xen_arm_machine_register_types)