qemu/include/hw/boards.h
Igor Mammedov 6063d4c0f9 vl.c: convert cpu_model to cpu type and set of global properties before machine_init()
All machines that support user specified cpu_model either call
cpu_generic_init() or cpu_class_by_name()/CPUClass::parse_features
to parse feature string and to get CPU type to create.

Which leads to code duplication and hard-codding default CPU model
within machine_foo_init() code. Which makes it impossible to
get CPU type before machine_init() is run.

So instead of setting default CPUs models and doing parsing in
target specific machine_foo_init() in various ways, provide
a generic data driven cpu_model parsing before machine_init()
is called.

in follow up per target patches, it will allow to:
  * define default CPU type in consistent/generic manner
    per machine type and drop custom code that fallbacks
    to default if cpu_model is NULL
  * drop custom features parsing in targets and do it
    in centralized way.
  * for cases of
      cpu_generic_init(TYPE_BASE/DEFAULT_CPU, "some_cpu")
    replace it with
      cpu_create(machine->cpu_type) || cpu_create(TYPE_FOO)
    depending if CPU type is user settable or not.
    not doing useless parsing and clearly documenting where
    CPU model is user settable or fixed one.

Patch allows machine subclasses to define default CPU type
per machine class at class_init() time and if that is set
generic code will parse cpu_model into a MachineState::cpu_type
which will be used to create CPUs for that machine instance
and allows gradual per board conversion.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <1505318697-77161-4-git-send-email-imammedo@redhat.com>
Acked-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2017-09-19 09:09:32 -03:00

277 lines
10 KiB
C

/* Declarations for use by board files for creating devices. */
#ifndef HW_BOARDS_H
#define HW_BOARDS_H
#include "sysemu/blockdev.h"
#include "sysemu/accel.h"
#include "hw/qdev.h"
#include "qom/object.h"
#include "qom/cpu.h"
/**
* memory_region_allocate_system_memory - Allocate a board's main memory
* @mr: the #MemoryRegion to be initialized
* @owner: the object that tracks the region's reference count
* @name: name of the memory region
* @ram_size: size of the region in bytes
*
* This function allocates the main memory for a board model, and
* initializes @mr appropriately. It also arranges for the memory
* to be migrated (by calling vmstate_register_ram_global()).
*
* Memory allocated via this function will be backed with the memory
* backend the user provided using "-mem-path" or "-numa node,memdev=..."
* if appropriate; this is typically used to cause host huge pages to be
* used. This function should therefore be called by a board exactly once,
* for the primary or largest RAM area it implements.
*
* For boards where the major RAM is split into two parts in the memory
* map, you can deal with this by calling memory_region_allocate_system_memory()
* once to get a MemoryRegion with enough RAM for both parts, and then
* creating alias MemoryRegions via memory_region_init_alias() which
* alias into different parts of the RAM MemoryRegion and can be mapped
* into the memory map in the appropriate places.
*
* Smaller pieces of memory (display RAM, static RAMs, etc) don't need
* to be backed via the -mem-path memory backend and can simply
* be created via memory_region_allocate_aux_memory() or
* memory_region_init_ram().
*/
void memory_region_allocate_system_memory(MemoryRegion *mr, Object *owner,
const char *name,
uint64_t ram_size);
#define TYPE_MACHINE_SUFFIX "-machine"
/* Machine class name that needs to be used for class-name-based machine
* type lookup to work.
*/
#define MACHINE_TYPE_NAME(machinename) (machinename TYPE_MACHINE_SUFFIX)
#define TYPE_MACHINE "machine"
#undef MACHINE /* BSD defines it and QEMU does not use it */
#define MACHINE(obj) \
OBJECT_CHECK(MachineState, (obj), TYPE_MACHINE)
#define MACHINE_GET_CLASS(obj) \
OBJECT_GET_CLASS(MachineClass, (obj), TYPE_MACHINE)
#define MACHINE_CLASS(klass) \
OBJECT_CLASS_CHECK(MachineClass, (klass), TYPE_MACHINE)
MachineClass *find_default_machine(void);
extern MachineState *current_machine;
void machine_run_board_init(MachineState *machine);
bool machine_usb(MachineState *machine);
bool machine_kernel_irqchip_allowed(MachineState *machine);
bool machine_kernel_irqchip_required(MachineState *machine);
bool machine_kernel_irqchip_split(MachineState *machine);
int machine_kvm_shadow_mem(MachineState *machine);
int machine_phandle_start(MachineState *machine);
bool machine_dump_guest_core(MachineState *machine);
bool machine_mem_merge(MachineState *machine);
void machine_register_compat_props(MachineState *machine);
HotpluggableCPUList *machine_query_hotpluggable_cpus(MachineState *machine);
void machine_set_cpu_numa_node(MachineState *machine,
const CpuInstanceProperties *props,
Error **errp);
/**
* CPUArchId:
* @arch_id - architecture-dependent CPU ID of present or possible CPU
* @cpu - pointer to corresponding CPU object if it's present on NULL otherwise
* @props - CPU object properties, initialized by board
* #vcpus_count - number of threads provided by @cpu object
*/
typedef struct {
uint64_t arch_id;
int64_t vcpus_count;
CpuInstanceProperties props;
Object *cpu;
} CPUArchId;
/**
* CPUArchIdList:
* @len - number of @CPUArchId items in @cpus array
* @cpus - array of present or possible CPUs for current machine configuration
*/
typedef struct {
int len;
CPUArchId cpus[0];
} CPUArchIdList;
/**
* MachineClass:
* @get_hotplug_handler: this function is called during bus-less
* device hotplug. If defined it returns pointer to an instance
* of HotplugHandler object, which handles hotplug operation
* for a given @dev. It may return NULL if @dev doesn't require
* any actions to be performed by hotplug handler.
* @cpu_index_to_instance_props:
* used to provide @cpu_index to socket/core/thread number mapping, allowing
* legacy code to perform maping from cpu_index to topology properties
* Returns: tuple of socket/core/thread ids given cpu_index belongs to.
* used to provide @cpu_index to socket number mapping, allowing
* a machine to group CPU threads belonging to the same socket/package
* Returns: socket number given cpu_index belongs to.
* @hw_version:
* Value of QEMU_VERSION when the machine was added to QEMU.
* Set only by old machines because they need to keep
* compatibility on code that exposed QEMU_VERSION to guests in
* the past (and now use qemu_hw_version()).
* @possible_cpu_arch_ids:
* Returns an array of @CPUArchId architecture-dependent CPU IDs
* which includes CPU IDs for present and possible to hotplug CPUs.
* Caller is responsible for freeing returned list.
* @has_hotpluggable_cpus:
* If true, board supports CPUs creation with -device/device_add.
* @default_cpu_type:
* specifies default CPU_TYPE, which will be used for parsing target
* specific features and for creating CPUs if CPU name wasn't provided
* explicitly at CLI
* @minimum_page_bits:
* If non-zero, the board promises never to create a CPU with a page size
* smaller than this, so QEMU can use a more efficient larger page
* size than the target architecture's minimum. (Attempting to create
* such a CPU will fail.) Note that changing this is a migration
* compatibility break for the machine.
* @ignore_memory_transaction_failures:
* If this is flag is true then the CPU will ignore memory transaction
* failures which should cause the CPU to take an exception due to an
* access to an unassigned physical address; the transaction will instead
* return zero (for a read) or be ignored (for a write). This should be
* set only by legacy board models which rely on the old RAZ/WI behaviour
* for handling devices that QEMU does not yet model. New board models
* should instead use "unimplemented-device" for all memory ranges where
* the guest will attempt to probe for a device that QEMU doesn't
* implement and a stub device is required.
*/
struct MachineClass {
/*< private >*/
ObjectClass parent_class;
/*< public >*/
const char *family; /* NULL iff @name identifies a standalone machtype */
char *name;
const char *alias;
const char *desc;
void (*init)(MachineState *state);
void (*reset)(void);
void (*hot_add_cpu)(const int64_t id, Error **errp);
int (*kvm_type)(const char *arg);
BlockInterfaceType block_default_type;
int units_per_default_bus;
int max_cpus;
unsigned int no_serial:1,
no_parallel:1,
use_virtcon:1,
use_sclp:1,
no_floppy:1,
no_cdrom:1,
no_sdcard:1,
has_dynamic_sysbus:1,
pci_allow_0_address:1,
legacy_fw_cfg_order:1;
int is_default;
const char *default_machine_opts;
const char *default_boot_order;
const char *default_display;
GArray *compat_props;
const char *hw_version;
ram_addr_t default_ram_size;
const char *default_cpu_type;
bool option_rom_has_mr;
bool rom_file_has_mr;
int minimum_page_bits;
bool has_hotpluggable_cpus;
bool ignore_memory_transaction_failures;
int numa_mem_align_shift;
void (*numa_auto_assign_ram)(MachineClass *mc, NodeInfo *nodes,
int nb_nodes, ram_addr_t size);
HotplugHandler *(*get_hotplug_handler)(MachineState *machine,
DeviceState *dev);
CpuInstanceProperties (*cpu_index_to_instance_props)(MachineState *machine,
unsigned cpu_index);
const CPUArchIdList *(*possible_cpu_arch_ids)(MachineState *machine);
};
/**
* MachineState:
*/
struct MachineState {
/*< private >*/
Object parent_obj;
Notifier sysbus_notifier;
/*< public >*/
char *accel;
bool kernel_irqchip_allowed;
bool kernel_irqchip_required;
bool kernel_irqchip_split;
int kvm_shadow_mem;
char *dtb;
char *dumpdtb;
int phandle_start;
char *dt_compatible;
bool dump_guest_core;
bool mem_merge;
bool usb;
bool usb_disabled;
bool igd_gfx_passthru;
char *firmware;
bool iommu;
bool suppress_vmdesc;
bool enforce_config_section;
bool enable_graphics;
ram_addr_t ram_size;
ram_addr_t maxram_size;
uint64_t ram_slots;
const char *boot_order;
char *kernel_filename;
char *kernel_cmdline;
char *initrd_filename;
const char *cpu_model;
const char *cpu_type;
AccelState *accelerator;
CPUArchIdList *possible_cpus;
};
#define DEFINE_MACHINE(namestr, machine_initfn) \
static void machine_initfn##_class_init(ObjectClass *oc, void *data) \
{ \
MachineClass *mc = MACHINE_CLASS(oc); \
machine_initfn(mc); \
} \
static const TypeInfo machine_initfn##_typeinfo = { \
.name = MACHINE_TYPE_NAME(namestr), \
.parent = TYPE_MACHINE, \
.class_init = machine_initfn##_class_init, \
}; \
static void machine_initfn##_register_types(void) \
{ \
type_register_static(&machine_initfn##_typeinfo); \
} \
type_init(machine_initfn##_register_types)
#define SET_MACHINE_COMPAT(m, COMPAT) \
do { \
int i; \
static GlobalProperty props[] = { \
COMPAT \
{ /* end of list */ } \
}; \
if (!m->compat_props) { \
m->compat_props = g_array_new(false, false, sizeof(void *)); \
} \
for (i = 0; props[i].driver != NULL; i++) { \
GlobalProperty *prop = &props[i]; \
g_array_append_val(m->compat_props, prop); \
} \
} while (0)
#endif