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_allocate_aux_memory() or
  39  * memory_region_init_ram().
  40  */
  41 void memory_region_allocate_system_memory(MemoryRegion *mr, Object *owner,
  42                                           const char *name,
  43                                           uint64_t ram_size);
  44
  45 #define TYPE_MACHINE_SUFFIX "-machine"
  46
  47 /* Machine class name that needs to be used for class-name-based machine
  48  * type lookup to work.
  49  */
  50 #define MACHINE_TYPE_NAME(machinename) (machinename TYPE_MACHINE_SUFFIX)
  51
  52 #define TYPE_MACHINE "machine"
  53 #undef MACHINE  /* BSD defines it and QEMU does not use it */
  54 #define MACHINE(obj) \
  55     OBJECT_CHECK(MachineState, (obj), TYPE_MACHINE)
  56 #define MACHINE_GET_CLASS(obj) \
  57     OBJECT_GET_CLASS(MachineClass, (obj), TYPE_MACHINE)
  58 #define MACHINE_CLASS(klass) \
  59     OBJECT_CLASS_CHECK(MachineClass, (klass), TYPE_MACHINE)
  60
  61 MachineClass *find_default_machine(void);
  62 extern MachineState *current_machine;
  63
  64 void machine_run_board_init(MachineState *machine);
  65 bool machine_usb(MachineState *machine);
  66 bool machine_kernel_irqchip_allowed(MachineState *machine);
  67 bool machine_kernel_irqchip_required(MachineState *machine);
  68 bool machine_kernel_irqchip_split(MachineState *machine);
  69 int machine_kvm_shadow_mem(MachineState *machine);
  70 int machine_phandle_start(MachineState *machine);
  71 bool machine_dump_guest_core(MachineState *machine);
  72 bool machine_mem_merge(MachineState *machine);
  73 void machine_register_compat_props(MachineState *machine);
  74 HotpluggableCPUList *machine_query_hotpluggable_cpus(MachineState *machine);
  75 void machine_set_cpu_numa_node(MachineState *machine,
  76                                const CpuInstanceProperties *props,
  77                                Error **errp);
  78
  79 /**
  80  * CPUArchId:
  81  * @arch_id - architecture-dependent CPU ID of present or possible CPU
  82  * @cpu - pointer to corresponding CPU object if it's present on NULL otherwise
  83  * @props - CPU object properties, initialized by board
  84  * #vcpus_count - number of threads provided by @cpu object
  85  */
  86 typedef struct {
  87     uint64_t arch_id;
  88     int64_t vcpus_count;
  89     CpuInstanceProperties props;
  90     Object *cpu;
  91 } CPUArchId;
  92
  93 /**
  94  * CPUArchIdList:
  95  * @len - number of @CPUArchId items in @cpus array
  96  * @cpus - array of present or possible CPUs for current machine configuration
  97  */
  98 typedef struct {
  99     int len;
 100     CPUArchId cpus[0];
 101 } CPUArchIdList;
 102
 103 /**
 104  * MachineClass:
 105  * @get_hotplug_handler: this function is called during bus-less
 106  *    device hotplug. If defined it returns pointer to an instance
 107  *    of HotplugHandler object, which handles hotplug operation
 108  *    for a given @dev. It may return NULL if @dev doesn't require
 109  *    any actions to be performed by hotplug handler.
 110  * @cpu_index_to_instance_props:
 111  *    used to provide @cpu_index to socket/core/thread number mapping, allowing
 112  *    legacy code to perform maping from cpu_index to topology properties
 113  *    Returns: tuple of socket/core/thread ids given cpu_index belongs to.
 114  *    used to provide @cpu_index to socket number mapping, allowing
 115  *    a machine to group CPU threads belonging to the same socket/package
 116  *    Returns: socket number given cpu_index belongs to.
 117  * @hw_version:
 118  *    Value of QEMU_VERSION when the machine was added to QEMU.
 119  *    Set only by old machines because they need to keep
 120  *    compatibility on code that exposed QEMU_VERSION to guests in
 121  *    the past (and now use qemu_hw_version()).
 122  * @possible_cpu_arch_ids:
 123  *    Returns an array of @CPUArchId architecture-dependent CPU IDs
 124  *    which includes CPU IDs for present and possible to hotplug CPUs.
 125  *    Caller is responsible for freeing returned list.
 126  * @get_default_cpu_node_id:
 127  *    returns default board specific node_id value for CPU slot specified by
 128  *    index @idx in @ms->possible_cpus[]
 129  * @has_hotpluggable_cpus:
 130  *    If true, board supports CPUs creation with -device/device_add.
 131  * @default_cpu_type:
 132  *    specifies default CPU_TYPE, which will be used for parsing target
 133  *    specific features and for creating CPUs if CPU name wasn't provided
 134  *    explicitly at CLI
 135  * @minimum_page_bits:
 136  *    If non-zero, the board promises never to create a CPU with a page size
 137  *    smaller than this, so QEMU can use a more efficient larger page
 138  *    size than the target architecture's minimum. (Attempting to create
 139  *    such a CPU will fail.) Note that changing this is a migration
 140  *    compatibility break for the machine.
 141  * @ignore_memory_transaction_failures:
 142  *    If this is flag is true then the CPU will ignore memory transaction
 143  *    failures which should cause the CPU to take an exception due to an
 144  *    access to an unassigned physical address; the transaction will instead
 145  *    return zero (for a read) or be ignored (for a write). This should be
 146  *    set only by legacy board models which rely on the old RAZ/WI behaviour
 147  *    for handling devices that QEMU does not yet model. New board models
 148  *    should instead use "unimplemented-device" for all memory ranges where
 149  *    the guest will attempt to probe for a device that QEMU doesn't
 150  *    implement and a stub device is required.
 151  */
 152 struct MachineClass {
 153     /*< private >*/
 154     ObjectClass parent_class;
 155     /*< public >*/
 156
 157     const char *family; /* NULL iff @name identifies a standalone machtype */
 158     char *name;
 159     const char *alias;
 160     const char *desc;
 161
 162     void (*init)(MachineState *state);
 163     void (*reset)(void);
 164     void (*hot_add_cpu)(const int64_t id, Error **errp);
 165     int (*kvm_type)(const char *arg);
 166
 167     BlockInterfaceType block_default_type;
 168     int units_per_default_bus;
 169     int max_cpus;
 170     unsigned int no_serial:1,
 171         no_parallel:1,
 172         use_virtcon:1,
 173         use_sclp:1,
 174         no_floppy:1,
 175         no_cdrom:1,
 176         no_sdcard:1,
 177         has_dynamic_sysbus:1,
 178         pci_allow_0_address:1,
 179         legacy_fw_cfg_order:1;
 180     int is_default;
 181     const char *default_machine_opts;
 182     const char *default_boot_order;
 183     const char *default_display;
 184     GArray *compat_props;
 185     const char *hw_version;
 186     ram_addr_t default_ram_size;
 187     const char *default_cpu_type;
 188     bool option_rom_has_mr;
 189     bool rom_file_has_mr;
 190     int minimum_page_bits;
 191     bool has_hotpluggable_cpus;
 192     bool ignore_memory_transaction_failures;
 193     int numa_mem_align_shift;
 194     const char **valid_cpu_types;
 195     void (*numa_auto_assign_ram)(MachineClass *mc, NodeInfo *nodes,
 196                                  int nb_nodes, ram_addr_t size);
 197
 198     HotplugHandler *(*get_hotplug_handler)(MachineState *machine,
 199                                            DeviceState *dev);
 200     CpuInstanceProperties (*cpu_index_to_instance_props)(MachineState *machine,
 201                                                          unsigned cpu_index);
 202     const CPUArchIdList *(*possible_cpu_arch_ids)(MachineState *machine);
 203     int64_t (*get_default_cpu_node_id)(const MachineState *ms, int idx);
 204 };
 205
 206 /**
 207  * MachineState:
 208  */
 209 struct MachineState {
 210     /*< private >*/
 211     Object parent_obj;
 212     Notifier sysbus_notifier;
 213
 214     /*< public >*/
 215
 216     char *accel;
 217     bool kernel_irqchip_allowed;
 218     bool kernel_irqchip_required;
 219     bool kernel_irqchip_split;
 220     int kvm_shadow_mem;
 221     char *dtb;
 222     char *dumpdtb;
 223     int phandle_start;
 224     char *dt_compatible;
 225     bool dump_guest_core;
 226     bool mem_merge;
 227     bool usb;
 228     bool usb_disabled;
 229     bool igd_gfx_passthru;
 230     char *firmware;
 231     bool iommu;
 232     bool suppress_vmdesc;
 233     bool enforce_config_section;
 234     bool enable_graphics;
 235
 236     ram_addr_t ram_size;
 237     ram_addr_t maxram_size;
 238     uint64_t   ram_slots;
 239     const char *boot_order;
 240     char *kernel_filename;
 241     char *kernel_cmdline;
 242     char *initrd_filename;
 243     const char *cpu_model;
 244     const char *cpu_type;
 245     AccelState *accelerator;
 246     CPUArchIdList *possible_cpus;
 247 };
 248
 249 #define DEFINE_MACHINE(namestr, machine_initfn) \
 250     static void machine_initfn##_class_init(ObjectClass *oc, void *data) \
 251     { \
 252         MachineClass *mc = MACHINE_CLASS(oc); \
 253         machine_initfn(mc); \
 254     } \
 255     static const TypeInfo machine_initfn##_typeinfo = { \
 256         .name       = MACHINE_TYPE_NAME(namestr), \
 257         .parent     = TYPE_MACHINE, \
 258         .class_init = machine_initfn##_class_init, \
 259     }; \
 260     static void machine_initfn##_register_types(void) \
 261     { \
 262         type_register_static(&machine_initfn##_typeinfo); \
 263     } \
 264     type_init(machine_initfn##_register_types)
 265
 266 #define SET_MACHINE_COMPAT(m, COMPAT) \
 267     do {                              \
 268         int i;                        \
 269         static GlobalProperty props[] = {       \
 270             COMPAT                              \
 271             { /* end of list */ }               \
 272         };                                      \
 273         if (!m->compat_props) { \
 274             m->compat_props = g_array_new(false, false, sizeof(void *)); \
 275         } \
 276         for (i = 0; props[i].driver != NULL; i++) {    \
 277             GlobalProperty *prop = &props[i];          \
 278             g_array_append_val(m->compat_props, prop); \
 279         }                                              \
 280     } while (0)
 281
 282 #endif