include/hw/boards.h

   1 /* Declarations for use by board files for creating devices.  */
   2
   3 #ifndef HW_BOARDS_H
   4 #define HW_BOARDS_H
   5
   6 #include "sysemu/blockdev.h"
   7 #include "sysemu/accel.h"
   8 #include "hw/qdev.h"
   9 #include "qom/object.h"
  10 #include "qom/cpu.h"
  11
  12 /**
  13  * memory_region_allocate_system_memory - Allocate a board's main memory
  14  * @mr: the #MemoryRegion to be initialized
  15  * @owner: the object that tracks the region's reference count
  16  * @name: name of the memory region
  17  * @ram_size: size of the region in bytes
  18  *
  19  * This function allocates the main memory for a board model, and
  20  * initializes @mr appropriately. It also arranges for the memory
  21  * to be migrated (by calling vmstate_register_ram_global()).
  22  *
  23  * Memory allocated via this function will be backed with the memory
  24  * backend the user provided using "-mem-path" or "-numa node,memdev=..."
  25  * if appropriate; this is typically used to cause host huge pages to be
  26  * used. This function should therefore be called by a board exactly once,
  27  * for the primary or largest RAM area it implements.
  28  *
  29  * For boards where the major RAM is split into two parts in the memory
  30  * map, you can deal with this by calling memory_region_allocate_system_memory()
  31  * once to get a MemoryRegion with enough RAM for both parts, and then
  32  * creating alias MemoryRegions via memory_region_init_alias() which
  33  * alias into different parts of the RAM MemoryRegion and can be mapped
  34  * into the memory map in the appropriate places.
  35  *
  36  * Smaller pieces of memory (display RAM, static RAMs, etc) don't need
  37  * to be backed via the -mem-path memory backend and can simply
  38  * be created via memory_region_init_ram().
  39  */
  40 void memory_region_allocate_system_memory(MemoryRegion *mr, Object *owner,
  41                                           const char *name,
  42                                           uint64_t ram_size);
  43
  44 #define TYPE_MACHINE_SUFFIX "-machine"
  45
  46 /* Machine class name that needs to be used for class-name-based machine
  47  * type lookup to work.
  48  */
  49 #define MACHINE_TYPE_NAME(machinename) (machinename TYPE_MACHINE_SUFFIX)
  50
  51 #define TYPE_MACHINE "machine"
  52 #undef MACHINE  /* BSD defines it and QEMU does not use it */
  53 #define MACHINE(obj) \
  54     OBJECT_CHECK(MachineState, (obj), TYPE_MACHINE)
  55 #define MACHINE_GET_CLASS(obj) \
  56     OBJECT_GET_CLASS(MachineClass, (obj), TYPE_MACHINE)
  57 #define MACHINE_CLASS(klass) \
  58     OBJECT_CLASS_CHECK(MachineClass, (klass), TYPE_MACHINE)
  59
  60 MachineClass *find_default_machine(void);
  61 extern MachineState *current_machine;
  62
  63 void machine_run_board_init(MachineState *machine);
  64 bool machine_usb(MachineState *machine);
  65 bool machine_kernel_irqchip_allowed(MachineState *machine);
  66 bool machine_kernel_irqchip_required(MachineState *machine);
  67 bool machine_kernel_irqchip_split(MachineState *machine);
  68 int machine_kvm_shadow_mem(MachineState *machine);
  69 int machine_phandle_start(MachineState *machine);
  70 bool machine_dump_guest_core(MachineState *machine);
  71 bool machine_mem_merge(MachineState *machine);
  72 HotpluggableCPUList *machine_query_hotpluggable_cpus(MachineState *machine);
  73 void machine_set_cpu_numa_node(MachineState *machine,
  74                                const CpuInstanceProperties *props,
  75                                Error **errp);
  76
  77 void machine_class_allow_dynamic_sysbus_dev(MachineClass *mc, const char *type);
  78
  79
  80 /**
  81  * CPUArchId:
  82  * @arch_id - architecture-dependent CPU ID of present or possible CPU
  83  * @cpu - pointer to corresponding CPU object if it's present on NULL otherwise
  84  * @type - QOM class name of possible @cpu object
  85  * @props - CPU object properties, initialized by board
  86  * #vcpus_count - number of threads provided by @cpu object
  87  */
  88 typedef struct {
  89     uint64_t arch_id;
  90     int64_t vcpus_count;
  91     CpuInstanceProperties props;
  92     Object *cpu;
  93     const char *type;
  94 } CPUArchId;
  95
  96 /**
  97  * CPUArchIdList:
  98  * @len - number of @CPUArchId items in @cpus array
  99  * @cpus - array of present or possible CPUs for current machine configuration
 100  */
 101 typedef struct {
 102     int len;
 103     CPUArchId cpus[0];
 104 } CPUArchIdList;
 105
 106 /**
 107  * MachineClass:
 108  * @deprecation_reason: If set, the machine is marked as deprecated. The
 109  *    string should provide some clear information about what to use instead.
 110  * @max_cpus: maximum number of CPUs supported. Default: 1
 111  * @min_cpus: minimum number of CPUs supported. Default: 1
 112  * @default_cpus: number of CPUs instantiated if none are specified. Default: 1
 113  * @get_hotplug_handler: this function is called during bus-less
 114  *    device hotplug. If defined it returns pointer to an instance
 115  *    of HotplugHandler object, which handles hotplug operation
 116  *    for a given @dev. It may return NULL if @dev doesn't require
 117  *    any actions to be performed by hotplug handler.
 118  * @cpu_index_to_instance_props:
 119  *    used to provide @cpu_index to socket/core/thread number mapping, allowing
 120  *    legacy code to perform maping from cpu_index to topology properties
 121  *    Returns: tuple of socket/core/thread ids given cpu_index belongs to.
 122  *    used to provide @cpu_index to socket number mapping, allowing
 123  *    a machine to group CPU threads belonging to the same socket/package
 124  *    Returns: socket number given cpu_index belongs to.
 125  * @hw_version:
 126  *    Value of QEMU_VERSION when the machine was added to QEMU.
 127  *    Set only by old machines because they need to keep
 128  *    compatibility on code that exposed QEMU_VERSION to guests in
 129  *    the past (and now use qemu_hw_version()).
 130  * @possible_cpu_arch_ids:
 131  *    Returns an array of @CPUArchId architecture-dependent CPU IDs
 132  *    which includes CPU IDs for present and possible to hotplug CPUs.
 133  *    Caller is responsible for freeing returned list.
 134  * @get_default_cpu_node_id:
 135  *    returns default board specific node_id value for CPU slot specified by
 136  *    index @idx in @ms->possible_cpus[]
 137  * @has_hotpluggable_cpus:
 138  *    If true, board supports CPUs creation with -device/device_add.
 139  * @default_cpu_type:
 140  *    specifies default CPU_TYPE, which will be used for parsing target
 141  *    specific features and for creating CPUs if CPU name wasn't provided
 142  *    explicitly at CLI
 143  * @minimum_page_bits:
 144  *    If non-zero, the board promises never to create a CPU with a page size
 145  *    smaller than this, so QEMU can use a more efficient larger page
 146  *    size than the target architecture's minimum. (Attempting to create
 147  *    such a CPU will fail.) Note that changing this is a migration
 148  *    compatibility break for the machine.
 149  * @ignore_memory_transaction_failures:
 150  *    If this is flag is true then the CPU will ignore memory transaction
 151  *    failures which should cause the CPU to take an exception due to an
 152  *    access to an unassigned physical address; the transaction will instead
 153  *    return zero (for a read) or be ignored (for a write). This should be
 154  *    set only by legacy board models which rely on the old RAZ/WI behaviour
 155  *    for handling devices that QEMU does not yet model. New board models
 156  *    should instead use "unimplemented-device" for all memory ranges where
 157  *    the guest will attempt to probe for a device that QEMU doesn't
 158  *    implement and a stub device is required.
 159  */
 160 struct MachineClass {
 161     /*< private >*/
 162     ObjectClass parent_class;
 163     /*< public >*/
 164
 165     const char *family; /* NULL iff @name identifies a standalone machtype */
 166     char *name;
 167     const char *alias;
 168     const char *desc;
 169     const char *deprecation_reason;
 170
 171     void (*init)(MachineState *state);
 172     void (*reset)(void);
 173     void (*hot_add_cpu)(const int64_t id, Error **errp);
 174     int (*kvm_type)(const char *arg);
 175
 176     BlockInterfaceType block_default_type;
 177     int units_per_default_bus;
 178     int max_cpus;
 179     int min_cpus;
 180     int default_cpus;
 181     unsigned int no_serial:1,
 182         no_parallel:1,
 183         use_virtcon:1,
 184         no_floppy:1,
 185         no_cdrom:1,
 186         no_sdcard:1,
 187         pci_allow_0_address:1,
 188         legacy_fw_cfg_order:1;
 189     int is_default;
 190     const char *default_machine_opts;
 191     const char *default_boot_order;
 192     const char *default_display;
 193     GPtrArray *compat_props;
 194     const char *hw_version;
 195     ram_addr_t default_ram_size;
 196     const char *default_cpu_type;
 197     bool default_kernel_irqchip_split;
 198     bool option_rom_has_mr;
 199     bool rom_file_has_mr;
 200     int minimum_page_bits;
 201     bool has_hotpluggable_cpus;
 202     bool ignore_memory_transaction_failures;
 203     int numa_mem_align_shift;
 204     const char **valid_cpu_types;
 205     strList *allowed_dynamic_sysbus_devices;
 206     bool auto_enable_numa_with_memhp;
 207     void (*numa_auto_assign_ram)(MachineClass *mc, NodeInfo *nodes,
 208                                  int nb_nodes, ram_addr_t size);
 209     bool ignore_boot_device_suffixes;
 210
 211     HotplugHandler *(*get_hotplug_handler)(MachineState *machine,
 212                                            DeviceState *dev);
 213     CpuInstanceProperties (*cpu_index_to_instance_props)(MachineState *machine,
 214                                                          unsigned cpu_index);
 215     const CPUArchIdList *(*possible_cpu_arch_ids)(MachineState *machine);
 216     int64_t (*get_default_cpu_node_id)(const MachineState *ms, int idx);
 217 };
 218
 219 /**
 220  * DeviceMemoryState:
 221  * @base: address in guest physical address space where the memory
 222  * address space for memory devices starts
 223  * @mr: address space container for memory devices
 224  */
 225 typedef struct DeviceMemoryState {
 226     hwaddr base;
 227     MemoryRegion mr;
 228 } DeviceMemoryState;
 229
 230 /**
 231  * MachineState:
 232  */
 233 struct MachineState {
 234     /*< private >*/
 235     Object parent_obj;
 236     Notifier sysbus_notifier;
 237
 238     /*< public >*/
 239
 240     char *accel;
 241     bool kernel_irqchip_allowed;
 242     bool kernel_irqchip_required;
 243     bool kernel_irqchip_split;
 244     int kvm_shadow_mem;
 245     char *dtb;
 246     char *dumpdtb;
 247     int phandle_start;
 248     char *dt_compatible;
 249     bool dump_guest_core;
 250     bool mem_merge;
 251     bool usb;
 252     bool usb_disabled;
 253     bool igd_gfx_passthru;
 254     char *firmware;
 255     bool iommu;
 256     bool suppress_vmdesc;
 257     bool enforce_config_section;
 258     bool enable_graphics;
 259     char *memory_encryption;
 260     DeviceMemoryState *device_memory;
 261
 262     ram_addr_t ram_size;
 263     ram_addr_t maxram_size;
 264     uint64_t   ram_slots;
 265     const char *boot_order;
 266     char *kernel_filename;
 267     char *kernel_cmdline;
 268     char *initrd_filename;
 269     const char *cpu_type;
 270     AccelState *accelerator;
 271     CPUArchIdList *possible_cpus;
 272 };
 273
 274 #define DEFINE_MACHINE(namestr, machine_initfn) \
 275     static void machine_initfn##_class_init(ObjectClass *oc, void *data) \
 276     { \
 277         MachineClass *mc = MACHINE_CLASS(oc); \
 278         machine_initfn(mc); \
 279     } \
 280     static const TypeInfo machine_initfn##_typeinfo = { \
 281         .name       = MACHINE_TYPE_NAME(namestr), \
 282         .parent     = TYPE_MACHINE, \
 283         .class_init = machine_initfn##_class_init, \
 284     }; \
 285     static void machine_initfn##_register_types(void) \
 286     { \
 287         type_register_static(&machine_initfn##_typeinfo); \
 288     } \
 289     type_init(machine_initfn##_register_types)
 290
 291 extern GlobalProperty hw_compat_3_1[];
 292 extern const size_t hw_compat_3_1_len;
 293
 294 extern GlobalProperty hw_compat_3_0[];
 295 extern const size_t hw_compat_3_0_len;
 296
 297 extern GlobalProperty hw_compat_2_12[];
 298 extern const size_t hw_compat_2_12_len;
 299
 300 extern GlobalProperty hw_compat_2_11[];
 301 extern const size_t hw_compat_2_11_len;
 302
 303 extern GlobalProperty hw_compat_2_10[];
 304 extern const size_t hw_compat_2_10_len;
 305
 306 extern GlobalProperty hw_compat_2_9[];
 307 extern const size_t hw_compat_2_9_len;
 308
 309 extern GlobalProperty hw_compat_2_8[];
 310 extern const size_t hw_compat_2_8_len;
 311
 312 extern GlobalProperty hw_compat_2_7[];
 313 extern const size_t hw_compat_2_7_len;
 314
 315 #endif