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 #include "trace.h"
  38
  39 #define TYPE_XEN_ARM  MACHINE_TYPE_NAME("xenpvh")
  40 OBJECT_DECLARE_SIMPLE_TYPE(XenArmState, XEN_ARM)
  41
  42 static const MemoryListener xen_memory_listener = {
  43     .region_add = xen_region_add,
  44     .region_del = xen_region_del,
  45     .log_start = NULL,
  46     .log_stop = NULL,
  47     .log_sync = NULL,
  48     .log_global_start = NULL,
  49     .log_global_stop = NULL,
  50     .priority = MEMORY_LISTENER_PRIORITY_ACCEL,
  51 };
  52
  53 struct XenArmState {
  54     /*< private >*/
  55     MachineState parent;
  56
  57     XenIOState *state;
  58
  59     struct {
  60         uint64_t tpm_base_addr;
  61     } cfg;
  62 };
  63
  64 static MemoryRegion ram_lo, ram_hi;
  65
  66 /*
  67  * VIRTIO_MMIO_DEV_SIZE is imported from tools/libs/light/libxl_arm.c under Xen
  68  * repository.
  69  *
  70  * Origin: git://xenbits.xen.org/xen.git 2128143c114c
  71  */
  72 #define VIRTIO_MMIO_DEV_SIZE   0x200
  73
  74 #define NR_VIRTIO_MMIO_DEVICES   \
  75    (GUEST_VIRTIO_MMIO_SPI_LAST - GUEST_VIRTIO_MMIO_SPI_FIRST)
  76
  77 static void xen_set_irq(void *opaque, int irq, int level)
  78 {
  79     if (xendevicemodel_set_irq_level(xen_dmod, xen_domid, irq, level)) {
  80         error_report("xendevicemodel_set_irq_level failed");
  81     }
  82 }
  83
  84 static void xen_create_virtio_mmio_devices(XenArmState *xam)
  85 {
  86     int i;
  87
  88     for (i = 0; i < NR_VIRTIO_MMIO_DEVICES; i++) {
  89         hwaddr base = GUEST_VIRTIO_MMIO_BASE + i * VIRTIO_MMIO_DEV_SIZE;
  90         qemu_irq irq = qemu_allocate_irq(xen_set_irq, NULL,
  91                                          GUEST_VIRTIO_MMIO_SPI_FIRST + i);
  92
  93         sysbus_create_simple("virtio-mmio", base, irq);
  94
  95         trace_xen_create_virtio_mmio_devices(i,
  96                                              GUEST_VIRTIO_MMIO_SPI_FIRST + i,
  97                                              base);
  98     }
  99 }
 100
 101 static void xen_init_ram(MachineState *machine)
 102 {
 103     MemoryRegion *sysmem = get_system_memory();
 104     ram_addr_t block_len, ram_size[GUEST_RAM_BANKS];
 105
 106     trace_xen_init_ram(machine->ram_size);
 107     if (machine->ram_size <= GUEST_RAM0_SIZE) {
 108         ram_size[0] = machine->ram_size;
 109         ram_size[1] = 0;
 110         block_len = GUEST_RAM0_BASE + ram_size[0];
 111     } else {
 112         ram_size[0] = GUEST_RAM0_SIZE;
 113         ram_size[1] = machine->ram_size - GUEST_RAM0_SIZE;
 114         block_len = GUEST_RAM1_BASE + ram_size[1];
 115     }
 116
 117     memory_region_init_ram(&ram_memory, NULL, "xen.ram", block_len,
 118                            &error_fatal);
 119
 120     memory_region_init_alias(&ram_lo, NULL, "xen.ram.lo", &ram_memory,
 121                              GUEST_RAM0_BASE, ram_size[0]);
 122     memory_region_add_subregion(sysmem, GUEST_RAM0_BASE, &ram_lo);
 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     }
 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         error_report("Couldn't find tmp0 backend");
 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     trace_xen_enable_tpm(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         warn_report("%s non-zero ram size not specified. QEMU machine started"
 181                     " without IOREQ (no emulated devices including virtio)",
 182                     MACHINE_CLASS(object_get_class(OBJECT(machine)))->desc);
 183         return;
 184     }
 185
 186     xen_init_ram(machine);
 187
 188     xen_register_ioreq(xam->state, machine->smp.cpus, &xen_memory_listener);
 189
 190     xen_create_virtio_mmio_devices(xam);
 191
 192 #ifdef CONFIG_TPM
 193     if (xam->cfg.tpm_base_addr) {
 194         xen_enable_tpm(xam);
 195     } else {
 196         warn_report("tpm-base-addr is not provided. TPM will not be enabled");
 197     }
 198 #endif
 199 }
 200
 201 #ifdef CONFIG_TPM
 202 static void xen_arm_get_tpm_base_addr(Object *obj, Visitor *v,
 203                                       const char *name, void *opaque,
 204                                       Error **errp)
 205 {
 206     XenArmState *xam = XEN_ARM(obj);
 207     uint64_t value = xam->cfg.tpm_base_addr;
 208
 209     visit_type_uint64(v, name, &value, errp);
 210 }
 211
 212 static void xen_arm_set_tpm_base_addr(Object *obj, Visitor *v,
 213                                       const char *name, void *opaque,
 214                                       Error **errp)
 215 {
 216     XenArmState *xam = XEN_ARM(obj);
 217     uint64_t value;
 218
 219     if (!visit_type_uint64(v, name, &value, errp)) {
 220         return;
 221     }
 222
 223     xam->cfg.tpm_base_addr = value;
 224 }
 225 #endif
 226
 227 static void xen_arm_machine_class_init(ObjectClass *oc, void *data)
 228 {
 229
 230     MachineClass *mc = MACHINE_CLASS(oc);
 231     mc->desc = "Xen Para-virtualized PC";
 232     mc->init = xen_arm_init;
 233     mc->max_cpus = 1;
 234     mc->default_machine_opts = "accel=xen";
 235     /* Set explicitly here to make sure that real ram_size is passed */
 236     mc->default_ram_size = 0;
 237
 238 #ifdef CONFIG_TPM
 239     object_class_property_add(oc, "tpm-base-addr", "uint64_t",
 240                               xen_arm_get_tpm_base_addr,
 241                               xen_arm_set_tpm_base_addr,
 242                               NULL, NULL);
 243     object_class_property_set_description(oc, "tpm-base-addr",
 244                                           "Set Base address for TPM device.");
 245
 246     machine_class_allow_dynamic_sysbus_dev(mc, TYPE_TPM_TIS_SYSBUS);
 247 #endif
 248 }
 249
 250 static const TypeInfo xen_arm_machine_type = {
 251     .name = TYPE_XEN_ARM,
 252     .parent = TYPE_MACHINE,
 253     .class_init = xen_arm_machine_class_init,
 254     .instance_size = sizeof(XenArmState),
 255 };
 256
 257 static void xen_arm_machine_register_types(void)
 258 {
 259     type_register_static(&xen_arm_machine_type);
 260 }
 261
 262 type_init(xen_arm_machine_register_types)