Initial import of qemu-2.4.1HEADmaster

4 files changed, 2337 insertions, 0 deletions

diff --git a/include/qom/cpu.h b/include/qom/cpu.h
new file mode 100644
index 00000000..20aabc9c
--- /dev/null
+++ b/include/qom/cpu.h
@@ -0,0 +1,711 @@
+/*
+ * QEMU CPU model
+ *
+ * Copyright (c) 2012 SUSE LINUX Products GmbH
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see
+ * <http://www.gnu.org/licenses/gpl-2.0.html>
+ */
+#ifndef QEMU_CPU_H
+#define QEMU_CPU_H
+
+#include <signal.h>
+#include <setjmp.h>
+#include "hw/qdev-core.h"
+#include "disas/bfd.h"
+#include "exec/hwaddr.h"
+#include "exec/memattrs.h"
+#include "qemu/queue.h"
+#include "qemu/thread.h"
+#include "qemu/tls.h"
+#include "qemu/typedefs.h"
+
+typedef int (*WriteCoreDumpFunction)(const void *buf, size_t size,
+                                     void *opaque);
+
+/**
+ * vaddr:
+ * Type wide enough to contain any #target_ulong virtual address.
+ */
+typedef uint64_t vaddr;
+#define VADDR_PRId PRId64
+#define VADDR_PRIu PRIu64
+#define VADDR_PRIo PRIo64
+#define VADDR_PRIx PRIx64
+#define VADDR_PRIX PRIX64
+#define VADDR_MAX UINT64_MAX
+
+/**
+ * SECTION:cpu
+ * @section_id: QEMU-cpu
+ * @title: CPU Class
+ * @short_description: Base class for all CPUs
+ */
+
+#define TYPE_CPU "cpu"
+
+/* Since this macro is used a lot in hot code paths and in conjunction with
+ * FooCPU *foo_env_get_cpu(), we deviate from usual QOM practice by using
+ * an unchecked cast.
+ */
+#define CPU(obj) ((CPUState *)(obj))
+
+#define CPU_CLASS(class) OBJECT_CLASS_CHECK(CPUClass, (class), TYPE_CPU)
+#define CPU_GET_CLASS(obj) OBJECT_GET_CLASS(CPUClass, (obj), TYPE_CPU)
+
+typedef struct CPUState CPUState;
+
+typedef void (*CPUUnassignedAccess)(CPUState *cpu, hwaddr addr,
+                                    bool is_write, bool is_exec, int opaque,
+                                    unsigned size);
+
+struct TranslationBlock;
+
+/**
+ * CPUClass:
+ * @class_by_name: Callback to map -cpu command line model name to an
+ * instantiatable CPU type.
+ * @parse_features: Callback to parse command line arguments.
+ * @reset: Callback to reset the #CPUState to its initial state.
+ * @reset_dump_flags: #CPUDumpFlags to use for reset logging.
+ * @has_work: Callback for checking if there is work to do.
+ * @do_interrupt: Callback for interrupt handling.
+ * @do_unassigned_access: Callback for unassigned access handling.
+ * @do_unaligned_access: Callback for unaligned access handling, if
+ * the target defines #ALIGNED_ONLY.
+ * @virtio_is_big_endian: Callback to return %true if a CPU which supports
+ * runtime configurable endianness is currently big-endian. Non-configurable
+ * CPUs can use the default implementation of this method. This method should
+ * not be used by any callers other than the pre-1.0 virtio devices.
+ * @memory_rw_debug: Callback for GDB memory access.
+ * @dump_state: Callback for dumping state.
+ * @dump_statistics: Callback for dumping statistics.
+ * @get_arch_id: Callback for getting architecture-dependent CPU ID.
+ * @get_paging_enabled: Callback for inquiring whether paging is enabled.
+ * @get_memory_mapping: Callback for obtaining the memory mappings.
+ * @set_pc: Callback for setting the Program Counter register.
+ * @synchronize_from_tb: Callback for synchronizing state from a TCG
+ * #TranslationBlock.
+ * @handle_mmu_fault: Callback for handling an MMU fault.
+ * @get_phys_page_debug: Callback for obtaining a physical address.
+ * @gdb_read_register: Callback for letting GDB read a register.
+ * @gdb_write_register: Callback for letting GDB write a register.
+ * @debug_excp_handler: Callback for handling debug exceptions.
+ * @write_elf64_note: Callback for writing a CPU-specific ELF note to a
+ * 64-bit VM coredump.
+ * @write_elf32_qemunote: Callback for writing a CPU- and QEMU-specific ELF
+ * note to a 32-bit VM coredump.
+ * @write_elf32_note: Callback for writing a CPU-specific ELF note to a
+ * 32-bit VM coredump.
+ * @write_elf32_qemunote: Callback for writing a CPU- and QEMU-specific ELF
+ * note to a 32-bit VM coredump.
+ * @vmsd: State description for migration.
+ * @gdb_num_core_regs: Number of core registers accessible to GDB.
+ * @gdb_core_xml_file: File name for core registers GDB XML description.
+ * @gdb_stop_before_watchpoint: Indicates whether GDB expects the CPU to stop
+ *           before the insn which triggers a watchpoint rather than after it.
+ * @cpu_exec_enter: Callback for cpu_exec preparation.
+ * @cpu_exec_exit: Callback for cpu_exec cleanup.
+ * @cpu_exec_interrupt: Callback for processing interrupts in cpu_exec.
+ * @disas_set_info: Setup architecture specific components of disassembly info
+ *
+ * Represents a CPU family or model.
+ */
+typedef struct CPUClass {
+    /*< private >*/
+    DeviceClass parent_class;
+    /*< public >*/
+
+    ObjectClass *(*class_by_name)(const char *cpu_model);
+    void (*parse_features)(CPUState *cpu, char *str, Error **errp);
+
+    void (*reset)(CPUState *cpu);
+    int reset_dump_flags;
+    bool (*has_work)(CPUState *cpu);
+    void (*do_interrupt)(CPUState *cpu);
+    CPUUnassignedAccess do_unassigned_access;
+    void (*do_unaligned_access)(CPUState *cpu, vaddr addr,
+                                int is_write, int is_user, uintptr_t retaddr);
+    bool (*virtio_is_big_endian)(CPUState *cpu);
+    int (*memory_rw_debug)(CPUState *cpu, vaddr addr,
+                           uint8_t *buf, int len, bool is_write);
+    void (*dump_state)(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf,
+                       int flags);
+    void (*dump_statistics)(CPUState *cpu, FILE *f,
+                            fprintf_function cpu_fprintf, int flags);
+    int64_t (*get_arch_id)(CPUState *cpu);
+    bool (*get_paging_enabled)(const CPUState *cpu);
+    void (*get_memory_mapping)(CPUState *cpu, MemoryMappingList *list,
+                               Error **errp);
+    void (*set_pc)(CPUState *cpu, vaddr value);
+    void (*synchronize_from_tb)(CPUState *cpu, struct TranslationBlock *tb);
+    int (*handle_mmu_fault)(CPUState *cpu, vaddr address, int rw,
+                            int mmu_index);
+    hwaddr (*get_phys_page_debug)(CPUState *cpu, vaddr addr);
+    int (*gdb_read_register)(CPUState *cpu, uint8_t *buf, int reg);
+    int (*gdb_write_register)(CPUState *cpu, uint8_t *buf, int reg);
+    void (*debug_excp_handler)(CPUState *cpu);
+
+    int (*write_elf64_note)(WriteCoreDumpFunction f, CPUState *cpu,
+                            int cpuid, void *opaque);
+    int (*write_elf64_qemunote)(WriteCoreDumpFunction f, CPUState *cpu,
+                                void *opaque);
+    int (*write_elf32_note)(WriteCoreDumpFunction f, CPUState *cpu,
+                            int cpuid, void *opaque);
+    int (*write_elf32_qemunote)(WriteCoreDumpFunction f, CPUState *cpu,
+                                void *opaque);
+
+    const struct VMStateDescription *vmsd;
+    int gdb_num_core_regs;
+    const char *gdb_core_xml_file;
+    bool gdb_stop_before_watchpoint;
+
+    void (*cpu_exec_enter)(CPUState *cpu);
+    void (*cpu_exec_exit)(CPUState *cpu);
+    bool (*cpu_exec_interrupt)(CPUState *cpu, int interrupt_request);
+
+    void (*disas_set_info)(CPUState *cpu, disassemble_info *info);
+} CPUClass;
+
+#ifdef HOST_WORDS_BIGENDIAN
+typedef struct icount_decr_u16 {
+    uint16_t high;
+    uint16_t low;
+} icount_decr_u16;
+#else
+typedef struct icount_decr_u16 {
+    uint16_t low;
+    uint16_t high;
+} icount_decr_u16;
+#endif
+
+typedef struct CPUBreakpoint {
+    vaddr pc;
+    int flags; /* BP_* */
+    QTAILQ_ENTRY(CPUBreakpoint) entry;
+} CPUBreakpoint;
+
+typedef struct CPUWatchpoint {
+    vaddr vaddr;
+    vaddr len;
+    vaddr hitaddr;
+    MemTxAttrs hitattrs;
+    int flags; /* BP_* */
+    QTAILQ_ENTRY(CPUWatchpoint) entry;
+} CPUWatchpoint;
+
+struct KVMState;
+struct kvm_run;
+
+#define TB_JMP_CACHE_BITS 12
+#define TB_JMP_CACHE_SIZE (1 << TB_JMP_CACHE_BITS)
+
+/**
+ * CPUState:
+ * @cpu_index: CPU index (informative).
+ * @nr_cores: Number of cores within this CPU package.
+ * @nr_threads: Number of threads within this CPU.
+ * @numa_node: NUMA node this CPU is belonging to.
+ * @host_tid: Host thread ID.
+ * @running: #true if CPU is currently running (usermode).
+ * @created: Indicates whether the CPU thread has been successfully created.
+ * @interrupt_request: Indicates a pending interrupt request.
+ * @halted: Nonzero if the CPU is in suspended state.
+ * @stop: Indicates a pending stop request.
+ * @stopped: Indicates the CPU has been artificially stopped.
+ * @tcg_exit_req: Set to force TCG to stop executing linked TBs for this
+ *           CPU and return to its top level loop.
+ * @singlestep_enabled: Flags for single-stepping.
+ * @icount_extra: Instructions until next timer event.
+ * @icount_decr: Number of cycles left, with interrupt flag in high bit.
+ * This allows a single read-compare-cbranch-write sequence to test
+ * for both decrementer underflow and exceptions.
+ * @can_do_io: Nonzero if memory-mapped IO is safe.
+ * @env_ptr: Pointer to subclass-specific CPUArchState field.
+ * @current_tb: Currently executing TB.
+ * @gdb_regs: Additional GDB registers.
+ * @gdb_num_regs: Number of total registers accessible to GDB.
+ * @gdb_num_g_regs: Number of registers in GDB 'g' packets.
+ * @next_cpu: Next CPU sharing TB cache.
+ * @opaque: User data.
+ * @mem_io_pc: Host Program Counter at which the memory was accessed.
+ * @mem_io_vaddr: Target virtual address at which the memory was accessed.
+ * @kvm_fd: vCPU file descriptor for KVM.
+ *
+ * State of one CPU core or thread.
+ */
+struct CPUState {
+    /*< private >*/
+    DeviceState parent_obj;
+    /*< public >*/
+
+    int nr_cores;
+    int nr_threads;
+    int numa_node;
+
+    struct QemuThread *thread;
+#ifdef _WIN32
+    HANDLE hThread;
+#endif
+    int thread_id;
+    uint32_t host_tid;
+    bool running;
+    struct QemuCond *halt_cond;
+    struct qemu_work_item *queued_work_first, *queued_work_last;
+    bool thread_kicked;
+    bool created;
+    bool stop;
+    bool stopped;
+    volatile sig_atomic_t exit_request;
+    uint32_t interrupt_request;
+    int singlestep_enabled;
+    int64_t icount_extra;
+    sigjmp_buf jmp_env;
+
+    AddressSpace *as;
+    struct AddressSpaceDispatch *memory_dispatch;
+    MemoryListener *tcg_as_listener;
+
+    void *env_ptr; /* CPUArchState */
+    struct TranslationBlock *current_tb;
+    struct TranslationBlock *tb_jmp_cache[TB_JMP_CACHE_SIZE];
+    struct GDBRegisterState *gdb_regs;
+    int gdb_num_regs;
+    int gdb_num_g_regs;
+    QTAILQ_ENTRY(CPUState) node;
+
+    /* ice debug support */
+    QTAILQ_HEAD(breakpoints_head, CPUBreakpoint) breakpoints;
+
+    QTAILQ_HEAD(watchpoints_head, CPUWatchpoint) watchpoints;
+    CPUWatchpoint *watchpoint_hit;
+
+    void *opaque;
+
+    /* In order to avoid passing too many arguments to the MMIO helpers,
+     * we store some rarely used information in the CPU context.
+     */
+    uintptr_t mem_io_pc;
+    vaddr mem_io_vaddr;
+
+    int kvm_fd;
+    bool kvm_vcpu_dirty;
+    struct KVMState *kvm_state;
+    struct kvm_run *kvm_run;
+
+    /* TODO Move common fields from CPUArchState here. */
+    int cpu_index; /* used by alpha TCG */
+    uint32_t halted; /* used by alpha, cris, ppc TCG */
+    union {
+        uint32_t u32;
+        icount_decr_u16 u16;
+    } icount_decr;
+    uint32_t can_do_io;
+    int32_t exception_index; /* used by m68k TCG */
+
+    /* Note that this is accessed at the start of every TB via a negative
+       offset from AREG0.  Leave this field at the end so as to make the
+       (absolute value) offset as small as possible.  This reduces code
+       size, especially for hosts without large memory offsets.  */
+    volatile sig_atomic_t tcg_exit_req;
+};
+
+QTAILQ_HEAD(CPUTailQ, CPUState);
+extern struct CPUTailQ cpus;
+#define CPU_NEXT(cpu) QTAILQ_NEXT(cpu, node)
+#define CPU_FOREACH(cpu) QTAILQ_FOREACH(cpu, &cpus, node)
+#define CPU_FOREACH_SAFE(cpu, next_cpu) \
+    QTAILQ_FOREACH_SAFE(cpu, &cpus, node, next_cpu)
+#define CPU_FOREACH_REVERSE(cpu) \
+    QTAILQ_FOREACH_REVERSE(cpu, &cpus, CPUTailQ, node)
+#define first_cpu QTAILQ_FIRST(&cpus)
+
+DECLARE_TLS(CPUState *, current_cpu);
+#define current_cpu tls_var(current_cpu)
+
+/**
+ * cpu_paging_enabled:
+ * @cpu: The CPU whose state is to be inspected.
+ *
+ * Returns: %true if paging is enabled, %false otherwise.
+ */
+bool cpu_paging_enabled(const CPUState *cpu);
+
+/**
+ * cpu_get_memory_mapping:
+ * @cpu: The CPU whose memory mappings are to be obtained.
+ * @list: Where to write the memory mappings to.
+ * @errp: Pointer for reporting an #Error.
+ */
+void cpu_get_memory_mapping(CPUState *cpu, MemoryMappingList *list,
+                            Error **errp);
+
+/**
+ * cpu_write_elf64_note:
+ * @f: pointer to a function that writes memory to a file
+ * @cpu: The CPU whose memory is to be dumped
+ * @cpuid: ID number of the CPU
+ * @opaque: pointer to the CPUState struct
+ */
+int cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cpu,
+                         int cpuid, void *opaque);
+
+/**
+ * cpu_write_elf64_qemunote:
+ * @f: pointer to a function that writes memory to a file
+ * @cpu: The CPU whose memory is to be dumped
+ * @cpuid: ID number of the CPU
+ * @opaque: pointer to the CPUState struct
+ */
+int cpu_write_elf64_qemunote(WriteCoreDumpFunction f, CPUState *cpu,
+                             void *opaque);
+
+/**
+ * cpu_write_elf32_note:
+ * @f: pointer to a function that writes memory to a file
+ * @cpu: The CPU whose memory is to be dumped
+ * @cpuid: ID number of the CPU
+ * @opaque: pointer to the CPUState struct
+ */
+int cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cpu,
+                         int cpuid, void *opaque);
+
+/**
+ * cpu_write_elf32_qemunote:
+ * @f: pointer to a function that writes memory to a file
+ * @cpu: The CPU whose memory is to be dumped
+ * @cpuid: ID number of the CPU
+ * @opaque: pointer to the CPUState struct
+ */
+int cpu_write_elf32_qemunote(WriteCoreDumpFunction f, CPUState *cpu,
+                             void *opaque);
+
+/**
+ * CPUDumpFlags:
+ * @CPU_DUMP_CODE:
+ * @CPU_DUMP_FPU: dump FPU register state, not just integer
+ * @CPU_DUMP_CCOP: dump info about TCG QEMU's condition code optimization state
+ */
+enum CPUDumpFlags {
+    CPU_DUMP_CODE = 0x00010000,
+    CPU_DUMP_FPU  = 0x00020000,
+    CPU_DUMP_CCOP = 0x00040000,
+};
+
+/**
+ * cpu_dump_state:
+ * @cpu: The CPU whose state is to be dumped.
+ * @f: File to dump to.
+ * @cpu_fprintf: Function to dump with.
+ * @flags: Flags what to dump.
+ *
+ * Dumps CPU state.
+ */
+void cpu_dump_state(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf,
+                    int flags);
+
+/**
+ * cpu_dump_statistics:
+ * @cpu: The CPU whose state is to be dumped.
+ * @f: File to dump to.
+ * @cpu_fprintf: Function to dump with.
+ * @flags: Flags what to dump.
+ *
+ * Dumps CPU statistics.
+ */
+void cpu_dump_statistics(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf,
+                         int flags);
+
+#ifndef CONFIG_USER_ONLY
+/**
+ * cpu_get_phys_page_debug:
+ * @cpu: The CPU to obtain the physical page address for.
+ * @addr: The virtual address.
+ *
+ * Obtains the physical page corresponding to a virtual one.
+ * Use it only for debugging because no protection checks are done.
+ *
+ * Returns: Corresponding physical page address or -1 if no page found.
+ */
+static inline hwaddr cpu_get_phys_page_debug(CPUState *cpu, vaddr addr)
+{
+    CPUClass *cc = CPU_GET_CLASS(cpu);
+
+    return cc->get_phys_page_debug(cpu, addr);
+}
+#endif
+
+/**
+ * cpu_reset:
+ * @cpu: The CPU whose state is to be reset.
+ */
+void cpu_reset(CPUState *cpu);
+
+/**
+ * cpu_class_by_name:
+ * @typename: The CPU base type.
+ * @cpu_model: The model string without any parameters.
+ *
+ * Looks up a CPU #ObjectClass matching name @cpu_model.
+ *
+ * Returns: A #CPUClass or %NULL if not matching class is found.
+ */
+ObjectClass *cpu_class_by_name(const char *typename, const char *cpu_model);
+
+/**
+ * cpu_generic_init:
+ * @typename: The CPU base type.
+ * @cpu_model: The model string including optional parameters.
+ *
+ * Instantiates a CPU, processes optional parameters and realizes the CPU.
+ *
+ * Returns: A #CPUState or %NULL if an error occurred.
+ */
+CPUState *cpu_generic_init(const char *typename, const char *cpu_model);
+
+/**
+ * cpu_has_work:
+ * @cpu: The vCPU to check.
+ *
+ * Checks whether the CPU has work to do.
+ *
+ * Returns: %true if the CPU has work, %false otherwise.
+ */
+static inline bool cpu_has_work(CPUState *cpu)
+{
+    CPUClass *cc = CPU_GET_CLASS(cpu);
+
+    g_assert(cc->has_work);
+    return cc->has_work(cpu);
+}
+
+/**
+ * qemu_cpu_is_self:
+ * @cpu: The vCPU to check against.
+ *
+ * Checks whether the caller is executing on the vCPU thread.
+ *
+ * Returns: %true if called from @cpu's thread, %false otherwise.
+ */
+bool qemu_cpu_is_self(CPUState *cpu);
+
+/**
+ * qemu_cpu_kick:
+ * @cpu: The vCPU to kick.
+ *
+ * Kicks @cpu's thread.
+ */
+void qemu_cpu_kick(CPUState *cpu);
+
+/**
+ * cpu_is_stopped:
+ * @cpu: The CPU to check.
+ *
+ * Checks whether the CPU is stopped.
+ *
+ * Returns: %true if run state is not running or if artificially stopped;
+ * %false otherwise.
+ */
+bool cpu_is_stopped(CPUState *cpu);
+
+/**
+ * run_on_cpu:
+ * @cpu: The vCPU to run on.
+ * @func: The function to be executed.
+ * @data: Data to pass to the function.
+ *
+ * Schedules the function @func for execution on the vCPU @cpu.
+ */
+void run_on_cpu(CPUState *cpu, void (*func)(void *data), void *data);
+
+/**
+ * async_run_on_cpu:
+ * @cpu: The vCPU to run on.
+ * @func: The function to be executed.
+ * @data: Data to pass to the function.
+ *
+ * Schedules the function @func for execution on the vCPU @cpu asynchronously.
+ */
+void async_run_on_cpu(CPUState *cpu, void (*func)(void *data), void *data);
+
+/**
+ * qemu_get_cpu:
+ * @index: The CPUState@cpu_index value of the CPU to obtain.
+ *
+ * Gets a CPU matching @index.
+ *
+ * Returns: The CPU or %NULL if there is no matching CPU.
+ */
+CPUState *qemu_get_cpu(int index);
+
+/**
+ * cpu_exists:
+ * @id: Guest-exposed CPU ID to lookup.
+ *
+ * Search for CPU with specified ID.
+ *
+ * Returns: %true - CPU is found, %false - CPU isn't found.
+ */
+bool cpu_exists(int64_t id);
+
+#ifndef CONFIG_USER_ONLY
+
+typedef void (*CPUInterruptHandler)(CPUState *, int);
+
+extern CPUInterruptHandler cpu_interrupt_handler;
+
+/**
+ * cpu_interrupt:
+ * @cpu: The CPU to set an interrupt on.
+ * @mask: The interupts to set.
+ *
+ * Invokes the interrupt handler.
+ */
+static inline void cpu_interrupt(CPUState *cpu, int mask)
+{
+    cpu_interrupt_handler(cpu, mask);
+}
+
+#else /* USER_ONLY */
+
+void cpu_interrupt(CPUState *cpu, int mask);
+
+#endif /* USER_ONLY */
+
+#ifdef CONFIG_SOFTMMU
+static inline void cpu_unassigned_access(CPUState *cpu, hwaddr addr,
+                                         bool is_write, bool is_exec,
+                                         int opaque, unsigned size)
+{
+    CPUClass *cc = CPU_GET_CLASS(cpu);
+
+    if (cc->do_unassigned_access) {
+        cc->do_unassigned_access(cpu, addr, is_write, is_exec, opaque, size);
+    }
+}
+
+static inline void cpu_unaligned_access(CPUState *cpu, vaddr addr,
+                                        int is_write, int is_user,
+                                        uintptr_t retaddr)
+{
+    CPUClass *cc = CPU_GET_CLASS(cpu);
+
+    cc->do_unaligned_access(cpu, addr, is_write, is_user, retaddr);
+}
+#endif
+
+/**
+ * cpu_set_pc:
+ * @cpu: The CPU to set the program counter for.
+ * @addr: Program counter value.
+ *
+ * Sets the program counter for a CPU.
+ */
+static inline void cpu_set_pc(CPUState *cpu, vaddr addr)
+{
+    CPUClass *cc = CPU_GET_CLASS(cpu);
+
+    cc->set_pc(cpu, addr);
+}
+
+/**
+ * cpu_reset_interrupt:
+ * @cpu: The CPU to clear the interrupt on.
+ * @mask: The interrupt mask to clear.
+ *
+ * Resets interrupts on the vCPU @cpu.
+ */
+void cpu_reset_interrupt(CPUState *cpu, int mask);
+
+/**
+ * cpu_exit:
+ * @cpu: The CPU to exit.
+ *
+ * Requests the CPU @cpu to exit execution.
+ */
+void cpu_exit(CPUState *cpu);
+
+/**
+ * cpu_resume:
+ * @cpu: The CPU to resume.
+ *
+ * Resumes CPU, i.e. puts CPU into runnable state.
+ */
+void cpu_resume(CPUState *cpu);
+
+/**
+ * qemu_init_vcpu:
+ * @cpu: The vCPU to initialize.
+ *
+ * Initializes a vCPU.
+ */
+void qemu_init_vcpu(CPUState *cpu);
+
+#define SSTEP_ENABLE  0x1  /* Enable simulated HW single stepping */
+#define SSTEP_NOIRQ   0x2  /* Do not use IRQ while single stepping */
+#define SSTEP_NOTIMER 0x4  /* Do not Timers while single stepping */
+
+/**
+ * cpu_single_step:
+ * @cpu: CPU to the flags for.
+ * @enabled: Flags to enable.
+ *
+ * Enables or disables single-stepping for @cpu.
+ */
+void cpu_single_step(CPUState *cpu, int enabled);
+
+/* Breakpoint/watchpoint flags */
+#define BP_MEM_READ           0x01
+#define BP_MEM_WRITE          0x02
+#define BP_MEM_ACCESS         (BP_MEM_READ | BP_MEM_WRITE)
+#define BP_STOP_BEFORE_ACCESS 0x04
+/* 0x08 currently unused */
+#define BP_GDB                0x10
+#define BP_CPU                0x20
+#define BP_WATCHPOINT_HIT_READ 0x40
+#define BP_WATCHPOINT_HIT_WRITE 0x80
+#define BP_WATCHPOINT_HIT (BP_WATCHPOINT_HIT_READ | BP_WATCHPOINT_HIT_WRITE)
+
+int cpu_breakpoint_insert(CPUState *cpu, vaddr pc, int flags,
+                          CPUBreakpoint **breakpoint);
+int cpu_breakpoint_remove(CPUState *cpu, vaddr pc, int flags);
+void cpu_breakpoint_remove_by_ref(CPUState *cpu, CPUBreakpoint *breakpoint);
+void cpu_breakpoint_remove_all(CPUState *cpu, int mask);
+
+int cpu_watchpoint_insert(CPUState *cpu, vaddr addr, vaddr len,
+                          int flags, CPUWatchpoint **watchpoint);
+int cpu_watchpoint_remove(CPUState *cpu, vaddr addr,
+                          vaddr len, int flags);
+void cpu_watchpoint_remove_by_ref(CPUState *cpu, CPUWatchpoint *watchpoint);
+void cpu_watchpoint_remove_all(CPUState *cpu, int mask);
+
+void QEMU_NORETURN cpu_abort(CPUState *cpu, const char *fmt, ...)
+    GCC_FMT_ATTR(2, 3);
+void cpu_exec_exit(CPUState *cpu);
+
+#ifdef CONFIG_SOFTMMU
+extern const struct VMStateDescription vmstate_cpu_common;
+#else
+#define vmstate_cpu_common vmstate_dummy
+#endif
+
+#define VMSTATE_CPU() {                                                     \
+    .name = "parent_obj",                                                   \
+    .size = sizeof(CPUState),                                               \
+    .vmsd = &vmstate_cpu_common,                                            \
+    .flags = VMS_STRUCT,                                                    \
+    .offset = 0,                                                            \
+}
+
+#endif
diff --git a/include/qom/object.h b/include/qom/object.h
new file mode 100644
index 00000000..807978ee
--- /dev/null
+++ b/include/qom/object.h
@@ -0,0 +1,1509 @@
+/*
+ * QEMU Object Model
+ *
+ * Copyright IBM, Corp. 2011
+ *
+ * Authors:
+ *  Anthony Liguori   <aliguori@us.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#ifndef QEMU_OBJECT_H
+#define QEMU_OBJECT_H
+
+#include <glib.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include "qemu/queue.h"
+#include "qapi/error.h"
+
+struct Visitor;
+
+struct TypeImpl;
+typedef struct TypeImpl *Type;
+
+typedef struct ObjectClass ObjectClass;
+typedef struct Object Object;
+
+typedef struct TypeInfo TypeInfo;
+
+typedef struct InterfaceClass InterfaceClass;
+typedef struct InterfaceInfo InterfaceInfo;
+
+#define TYPE_OBJECT "object"
+
+/**
+ * SECTION:object.h
+ * @title:Base Object Type System
+ * @short_description: interfaces for creating new types and objects
+ *
+ * The QEMU Object Model provides a framework for registering user creatable
+ * types and instantiating objects from those types.  QOM provides the following
+ * features:
+ *
+ *  - System for dynamically registering types
+ *  - Support for single-inheritance of types
+ *  - Multiple inheritance of stateless interfaces
+ *
+ * <example>
+ *   <title>Creating a minimal type</title>
+ *   <programlisting>
+ * #include "qdev.h"
+ *
+ * #define TYPE_MY_DEVICE "my-device"
+ *
+ * // No new virtual functions: we can reuse the typedef for the
+ * // superclass.
+ * typedef DeviceClass MyDeviceClass;
+ * typedef struct MyDevice
+ * {
+ *     DeviceState parent;
+ *
+ *     int reg0, reg1, reg2;
+ * } MyDevice;
+ *
+ * static const TypeInfo my_device_info = {
+ *     .name = TYPE_MY_DEVICE,
+ *     .parent = TYPE_DEVICE,
+ *     .instance_size = sizeof(MyDevice),
+ * };
+ *
+ * static void my_device_register_types(void)
+ * {
+ *     type_register_static(&my_device_info);
+ * }
+ *
+ * type_init(my_device_register_types)
+ *   </programlisting>
+ * </example>
+ *
+ * In the above example, we create a simple type that is described by #TypeInfo.
+ * #TypeInfo describes information about the type including what it inherits
+ * from, the instance and class size, and constructor/destructor hooks.
+ *
+ * Every type has an #ObjectClass associated with it.  #ObjectClass derivatives
+ * are instantiated dynamically but there is only ever one instance for any
+ * given type.  The #ObjectClass typically holds a table of function pointers
+ * for the virtual methods implemented by this type.
+ *
+ * Using object_new(), a new #Object derivative will be instantiated.  You can
+ * cast an #Object to a subclass (or base-class) type using
+ * object_dynamic_cast().  You typically want to define macro wrappers around
+ * OBJECT_CHECK() and OBJECT_CLASS_CHECK() to make it easier to convert to a
+ * specific type:
+ *
+ * <example>
+ *   <title>Typecasting macros</title>
+ *   <programlisting>
+ *    #define MY_DEVICE_GET_CLASS(obj) \
+ *       OBJECT_GET_CLASS(MyDeviceClass, obj, TYPE_MY_DEVICE)
+ *    #define MY_DEVICE_CLASS(klass) \
+ *       OBJECT_CLASS_CHECK(MyDeviceClass, klass, TYPE_MY_DEVICE)
+ *    #define MY_DEVICE(obj) \
+ *       OBJECT_CHECK(MyDevice, obj, TYPE_MY_DEVICE)
+ *   </programlisting>
+ * </example>
+ *
+ * # Class Initialization #
+ *
+ * Before an object is initialized, the class for the object must be
+ * initialized.  There is only one class object for all instance objects
+ * that is created lazily.
+ *
+ * Classes are initialized by first initializing any parent classes (if
+ * necessary).  After the parent class object has initialized, it will be
+ * copied into the current class object and any additional storage in the
+ * class object is zero filled.
+ *
+ * The effect of this is that classes automatically inherit any virtual
+ * function pointers that the parent class has already initialized.  All
+ * other fields will be zero filled.
+ *
+ * Once all of the parent classes have been initialized, #TypeInfo::class_init
+ * is called to let the class being instantiated provide default initialize for
+ * its virtual functions.  Here is how the above example might be modified
+ * to introduce an overridden virtual function:
+ *
+ * <example>
+ *   <title>Overriding a virtual function</title>
+ *   <programlisting>
+ * #include "qdev.h"
+ *
+ * void my_device_class_init(ObjectClass *klass, void *class_data)
+ * {
+ *     DeviceClass *dc = DEVICE_CLASS(klass);
+ *     dc->reset = my_device_reset;
+ * }
+ *
+ * static const TypeInfo my_device_info = {
+ *     .name = TYPE_MY_DEVICE,
+ *     .parent = TYPE_DEVICE,
+ *     .instance_size = sizeof(MyDevice),
+ *     .class_init = my_device_class_init,
+ * };
+ *   </programlisting>
+ * </example>
+ *
+ * Introducing new virtual methods requires a class to define its own
+ * struct and to add a .class_size member to the #TypeInfo.  Each method
+ * will also have a wrapper function to call it easily:
+ *
+ * <example>
+ *   <title>Defining an abstract class</title>
+ *   <programlisting>
+ * #include "qdev.h"
+ *
+ * typedef struct MyDeviceClass
+ * {
+ *     DeviceClass parent;
+ *
+ *     void (*frobnicate) (MyDevice *obj);
+ * } MyDeviceClass;
+ *
+ * static const TypeInfo my_device_info = {
+ *     .name = TYPE_MY_DEVICE,
+ *     .parent = TYPE_DEVICE,
+ *     .instance_size = sizeof(MyDevice),
+ *     .abstract = true, // or set a default in my_device_class_init
+ *     .class_size = sizeof(MyDeviceClass),
+ * };
+ *
+ * void my_device_frobnicate(MyDevice *obj)
+ * {
+ *     MyDeviceClass *klass = MY_DEVICE_GET_CLASS(obj);
+ *
+ *     klass->frobnicate(obj);
+ * }
+ *   </programlisting>
+ * </example>
+ *
+ * # Interfaces #
+ *
+ * Interfaces allow a limited form of multiple inheritance.  Instances are
+ * similar to normal types except for the fact that are only defined by
+ * their classes and never carry any state.  You can dynamically cast an object
+ * to one of its #Interface types and vice versa.
+ *
+ * # Methods #
+ *
+ * A <emphasis>method</emphasis> is a function within the namespace scope of
+ * a class. It usually operates on the object instance by passing it as a
+ * strongly-typed first argument.
+ * If it does not operate on an object instance, it is dubbed
+ * <emphasis>class method</emphasis>.
+ *
+ * Methods cannot be overloaded. That is, the #ObjectClass and method name
+ * uniquely identity the function to be called; the signature does not vary
+ * except for trailing varargs.
+ *
+ * Methods are always <emphasis>virtual</emphasis>. Overriding a method in
+ * #TypeInfo.class_init of a subclass leads to any user of the class obtained
+ * via OBJECT_GET_CLASS() accessing the overridden function.
+ * The original function is not automatically invoked. It is the responsibility
+ * of the overriding class to determine whether and when to invoke the method
+ * being overridden.
+ *
+ * To invoke the method being overridden, the preferred solution is to store
+ * the original value in the overriding class before overriding the method.
+ * This corresponds to |[ {super,base}.method(...) ]| in Java and C#
+ * respectively; this frees the overriding class from hardcoding its parent
+ * class, which someone might choose to change at some point.
+ *
+ * <example>
+ *   <title>Overriding a virtual method</title>
+ *   <programlisting>
+ * typedef struct MyState MyState;
+ *
+ * typedef void (*MyDoSomething)(MyState *obj);
+ *
+ * typedef struct MyClass {
+ *     ObjectClass parent_class;
+ *
+ *     MyDoSomething do_something;
+ * } MyClass;
+ *
+ * static void my_do_something(MyState *obj)
+ * {
+ *     // do something
+ * }
+ *
+ * static void my_class_init(ObjectClass *oc, void *data)
+ * {
+ *     MyClass *mc = MY_CLASS(oc);
+ *
+ *     mc->do_something = my_do_something;
+ * }
+ *
+ * static const TypeInfo my_type_info = {
+ *     .name = TYPE_MY,
+ *     .parent = TYPE_OBJECT,
+ *     .instance_size = sizeof(MyState),
+ *     .class_size = sizeof(MyClass),
+ *     .class_init = my_class_init,
+ * };
+ *
+ * typedef struct DerivedClass {
+ *     MyClass parent_class;
+ *
+ *     MyDoSomething parent_do_something;
+ * } DerivedClass;
+ *
+ * static void derived_do_something(MyState *obj)
+ * {
+ *     DerivedClass *dc = DERIVED_GET_CLASS(obj);
+ *
+ *     // do something here
+ *     dc->parent_do_something(obj);
+ *     // do something else here
+ * }
+ *
+ * static void derived_class_init(ObjectClass *oc, void *data)
+ * {
+ *     MyClass *mc = MY_CLASS(oc);
+ *     DerivedClass *dc = DERIVED_CLASS(oc);
+ *
+ *     dc->parent_do_something = mc->do_something;
+ *     mc->do_something = derived_do_something;
+ * }
+ *
+ * static const TypeInfo derived_type_info = {
+ *     .name = TYPE_DERIVED,
+ *     .parent = TYPE_MY,
+ *     .class_size = sizeof(DerivedClass),
+ *     .class_init = derived_class_init,
+ * };
+ *   </programlisting>
+ * </example>
+ *
+ * Alternatively, object_class_by_name() can be used to obtain the class and
+ * its non-overridden methods for a specific type. This would correspond to
+ * |[ MyClass::method(...) ]| in C++.
+ *
+ * The first example of such a QOM method was #CPUClass.reset,
+ * another example is #DeviceClass.realize.
+ */
+
+
+/**
+ * ObjectPropertyAccessor:
+ * @obj: the object that owns the property
+ * @v: the visitor that contains the property data
+ * @opaque: the object property opaque
+ * @name: the name of the property
+ * @errp: a pointer to an Error that is filled if getting/setting fails.
+ *
+ * Called when trying to get/set a property.
+ */
+typedef void (ObjectPropertyAccessor)(Object *obj,
+                                      struct Visitor *v,
+                                      void *opaque,
+                                      const char *name,
+                                      Error **errp);
+
+/**
+ * ObjectPropertyResolve:
+ * @obj: the object that owns the property
+ * @opaque: the opaque registered with the property
+ * @part: the name of the property
+ *
+ * Resolves the #Object corresponding to property @part.
+ *
+ * The returned object can also be used as a starting point
+ * to resolve a relative path starting with "@part".
+ *
+ * Returns: If @path is the path that led to @obj, the function
+ * returns the #Object corresponding to "@path/@part".
+ * If "@path/@part" is not a valid object path, it returns #NULL.
+ */
+typedef Object *(ObjectPropertyResolve)(Object *obj,
+                                        void *opaque,
+                                        const char *part);
+
+/**
+ * ObjectPropertyRelease:
+ * @obj: the object that owns the property
+ * @name: the name of the property
+ * @opaque: the opaque registered with the property
+ *
+ * Called when a property is removed from a object.
+ */
+typedef void (ObjectPropertyRelease)(Object *obj,
+                                     const char *name,
+                                     void *opaque);
+
+typedef struct ObjectProperty
+{
+    gchar *name;
+    gchar *type;
+    gchar *description;
+    ObjectPropertyAccessor *get;
+    ObjectPropertyAccessor *set;
+    ObjectPropertyResolve *resolve;
+    ObjectPropertyRelease *release;
+    void *opaque;
+
+    QTAILQ_ENTRY(ObjectProperty) node;
+} ObjectProperty;
+
+/**
+ * ObjectUnparent:
+ * @obj: the object that is being removed from the composition tree
+ *
+ * Called when an object is being removed from the QOM composition tree.
+ * The function should remove any backlinks from children objects to @obj.
+ */
+typedef void (ObjectUnparent)(Object *obj);
+
+/**
+ * ObjectFree:
+ * @obj: the object being freed
+ *
+ * Called when an object's last reference is removed.
+ */
+typedef void (ObjectFree)(void *obj);
+
+#define OBJECT_CLASS_CAST_CACHE 4
+
+/**
+ * ObjectClass:
+ *
+ * The base for all classes.  The only thing that #ObjectClass contains is an
+ * integer type handle.
+ */
+struct ObjectClass
+{
+    /*< private >*/
+    Type type;
+    GSList *interfaces;
+
+    const char *object_cast_cache[OBJECT_CLASS_CAST_CACHE];
+    const char *class_cast_cache[OBJECT_CLASS_CAST_CACHE];
+
+    ObjectUnparent *unparent;
+};
+
+/**
+ * Object:
+ *
+ * The base for all objects.  The first member of this object is a pointer to
+ * a #ObjectClass.  Since C guarantees that the first member of a structure
+ * always begins at byte 0 of that structure, as long as any sub-object places
+ * its parent as the first member, we can cast directly to a #Object.
+ *
+ * As a result, #Object contains a reference to the objects type as its
+ * first member.  This allows identification of the real type of the object at
+ * run time.
+ *
+ * #Object also contains a list of #Interfaces that this object
+ * implements.
+ */
+struct Object
+{
+    /*< private >*/
+    ObjectClass *class;
+    ObjectFree *free;
+    QTAILQ_HEAD(, ObjectProperty) properties;
+    uint32_t ref;
+    Object *parent;
+};
+
+/**
+ * TypeInfo:
+ * @name: The name of the type.
+ * @parent: The name of the parent type.
+ * @instance_size: The size of the object (derivative of #Object).  If
+ *   @instance_size is 0, then the size of the object will be the size of the
+ *   parent object.
+ * @instance_init: This function is called to initialize an object.  The parent
+ *   class will have already been initialized so the type is only responsible
+ *   for initializing its own members.
+ * @instance_post_init: This function is called to finish initialization of
+ *   an object, after all @instance_init functions were called.
+ * @instance_finalize: This function is called during object destruction.  This
+ *   is called before the parent @instance_finalize function has been called.
+ *   An object should only free the members that are unique to its type in this
+ *   function.
+ * @abstract: If this field is true, then the class is considered abstract and
+ *   cannot be directly instantiated.
+ * @class_size: The size of the class object (derivative of #ObjectClass)
+ *   for this object.  If @class_size is 0, then the size of the class will be
+ *   assumed to be the size of the parent class.  This allows a type to avoid
+ *   implementing an explicit class type if they are not adding additional
+ *   virtual functions.
+ * @class_init: This function is called after all parent class initialization
+ *   has occurred to allow a class to set its default virtual method pointers.
+ *   This is also the function to use to override virtual methods from a parent
+ *   class.
+ * @class_base_init: This function is called for all base classes after all
+ *   parent class initialization has occurred, but before the class itself
+ *   is initialized.  This is the function to use to undo the effects of
+ *   memcpy from the parent class to the descendents.
+ * @class_finalize: This function is called during class destruction and is
+ *   meant to release and dynamic parameters allocated by @class_init.
+ * @class_data: Data to pass to the @class_init, @class_base_init and
+ *   @class_finalize functions.  This can be useful when building dynamic
+ *   classes.
+ * @interfaces: The list of interfaces associated with this type.  This
+ *   should point to a static array that's terminated with a zero filled
+ *   element.
+ */
+struct TypeInfo
+{
+    const char *name;
+    const char *parent;
+
+    size_t instance_size;
+    void (*instance_init)(Object *obj);
+    void (*instance_post_init)(Object *obj);
+    void (*instance_finalize)(Object *obj);
+
+    bool abstract;
+    size_t class_size;
+
+    void (*class_init)(ObjectClass *klass, void *data);
+    void (*class_base_init)(ObjectClass *klass, void *data);
+    void (*class_finalize)(ObjectClass *klass, void *data);
+    void *class_data;
+
+    InterfaceInfo *interfaces;
+};
+
+/**
+ * OBJECT:
+ * @obj: A derivative of #Object
+ *
+ * Converts an object to a #Object.  Since all objects are #Objects,
+ * this function will always succeed.
+ */
+#define OBJECT(obj) \
+    ((Object *)(obj))
+
+/**
+ * OBJECT_CLASS:
+ * @class: A derivative of #ObjectClass.
+ *
+ * Converts a class to an #ObjectClass.  Since all objects are #Objects,
+ * this function will always succeed.
+ */
+#define OBJECT_CLASS(class) \
+    ((ObjectClass *)(class))
+
+/**
+ * OBJECT_CHECK:
+ * @type: The C type to use for the return value.
+ * @obj: A derivative of @type to cast.
+ * @name: The QOM typename of @type
+ *
+ * A type safe version of @object_dynamic_cast_assert.  Typically each class
+ * will define a macro based on this type to perform type safe dynamic_casts to
+ * this object type.
+ *
+ * If an invalid object is passed to this function, a run time assert will be
+ * generated.
+ */
+#define OBJECT_CHECK(type, obj, name) \
+    ((type *)object_dynamic_cast_assert(OBJECT(obj), (name), \
+                                        __FILE__, __LINE__, __func__))
+
+/**
+ * OBJECT_CLASS_CHECK:
+ * @class: The C type to use for the return value.
+ * @obj: A derivative of @type to cast.
+ * @name: the QOM typename of @class.
+ *
+ * A type safe version of @object_class_dynamic_cast_assert.  This macro is
+ * typically wrapped by each type to perform type safe casts of a class to a
+ * specific class type.
+ */
+#define OBJECT_CLASS_CHECK(class, obj, name) \
+    ((class *)object_class_dynamic_cast_assert(OBJECT_CLASS(obj), (name), \
+                                               __FILE__, __LINE__, __func__))
+
+/**
+ * OBJECT_GET_CLASS:
+ * @class: The C type to use for the return value.
+ * @obj: The object to obtain the class for.
+ * @name: The QOM typename of @obj.
+ *
+ * This function will return a specific class for a given object.  Its generally
+ * used by each type to provide a type safe macro to get a specific class type
+ * from an object.
+ */
+#define OBJECT_GET_CLASS(class, obj, name) \
+    OBJECT_CLASS_CHECK(class, object_get_class(OBJECT(obj)), name)
+
+/**
+ * InterfaceInfo:
+ * @type: The name of the interface.
+ *
+ * The information associated with an interface.
+ */
+struct InterfaceInfo {
+    const char *type;
+};
+
+/**
+ * InterfaceClass:
+ * @parent_class: the base class
+ *
+ * The class for all interfaces.  Subclasses of this class should only add
+ * virtual methods.
+ */
+struct InterfaceClass
+{
+    ObjectClass parent_class;
+    /*< private >*/
+    ObjectClass *concrete_class;
+    Type interface_type;
+};
+
+#define TYPE_INTERFACE "interface"
+
+/**
+ * INTERFACE_CLASS:
+ * @klass: class to cast from
+ * Returns: An #InterfaceClass or raise an error if cast is invalid
+ */
+#define INTERFACE_CLASS(klass) \
+    OBJECT_CLASS_CHECK(InterfaceClass, klass, TYPE_INTERFACE)
+
+/**
+ * INTERFACE_CHECK:
+ * @interface: the type to return
+ * @obj: the object to convert to an interface
+ * @name: the interface type name
+ *
+ * Returns: @obj casted to @interface if cast is valid, otherwise raise error.
+ */
+#define INTERFACE_CHECK(interface, obj, name) \
+    ((interface *)object_dynamic_cast_assert(OBJECT((obj)), (name), \
+                                             __FILE__, __LINE__, __func__))
+
+/**
+ * object_new:
+ * @typename: The name of the type of the object to instantiate.
+ *
+ * This function will initialize a new object using heap allocated memory.
+ * The returned object has a reference count of 1, and will be freed when
+ * the last reference is dropped.
+ *
+ * Returns: The newly allocated and instantiated object.
+ */
+Object *object_new(const char *typename);
+
+/**
+ * object_new_with_type:
+ * @type: The type of the object to instantiate.
+ *
+ * This function will initialize a new object using heap allocated memory.
+ * The returned object has a reference count of 1, and will be freed when
+ * the last reference is dropped.
+ *
+ * Returns: The newly allocated and instantiated object.
+ */
+Object *object_new_with_type(Type type);
+
+/**
+ * object_new_with_props:
+ * @typename:  The name of the type of the object to instantiate.
+ * @parent: the parent object
+ * @id: The unique ID of the object
+ * @errp: pointer to error object
+ * @...: list of property names and values
+ *
+ * This function will initialize a new object using heap allocated memory.
+ * The returned object has a reference count of 1, and will be freed when
+ * the last reference is dropped.
+ *
+ * The @id parameter will be used when registering the object as a
+ * child of @parent in the composition tree.
+ *
+ * The variadic parameters are a list of pairs of (propname, propvalue)
+ * strings. The propname of %NULL indicates the end of the property
+ * list. If the object implements the user creatable interface, the
+ * object will be marked complete once all the properties have been
+ * processed.
+ *
+ * <example>
+ *   <title>Creating an object with properties</title>
+ *   <programlisting>
+ *   Error *err = NULL;
+ *   Object *obj;
+ *
+ *   obj = object_new_with_props(TYPE_MEMORY_BACKEND_FILE,
+ *                               object_get_objects_root(),
+ *                               "hostmem0",
+ *                               &err,
+ *                               "share", "yes",
+ *                               "mem-path", "/dev/shm/somefile",
+ *                               "prealloc", "yes",
+ *                               "size", "1048576",
+ *                               NULL);
+ *
+ *   if (!obj) {
+ *     g_printerr("Cannot create memory backend: %s\n",
+ *                error_get_pretty(err));
+ *   }
+ *   </programlisting>
+ * </example>
+ *
+ * The returned object will have one stable reference maintained
+ * for as long as it is present in the object hierarchy.
+ *
+ * Returns: The newly allocated, instantiated & initialized object.
+ */
+Object *object_new_with_props(const char *typename,
+                              Object *parent,
+                              const char *id,
+                              Error **errp,
+                              ...) QEMU_SENTINEL;
+
+/**
+ * object_new_with_propv:
+ * @typename:  The name of the type of the object to instantiate.
+ * @parent: the parent object
+ * @id: The unique ID of the object
+ * @errp: pointer to error object
+ * @vargs: list of property names and values
+ *
+ * See object_new_with_props() for documentation.
+ */
+Object *object_new_with_propv(const char *typename,
+                              Object *parent,
+                              const char *id,
+                              Error **errp,
+                              va_list vargs);
+
+/**
+ * object_set_props:
+ * @obj: the object instance to set properties on
+ * @errp: pointer to error object
+ * @...: list of property names and values
+ *
+ * This function will set a list of properties on an existing object
+ * instance.
+ *
+ * The variadic parameters are a list of pairs of (propname, propvalue)
+ * strings. The propname of %NULL indicates the end of the property
+ * list.
+ *
+ * <example>
+ *   <title>Update an object's properties</title>
+ *   <programlisting>
+ *   Error *err = NULL;
+ *   Object *obj = ...get / create object...;
+ *
+ *   obj = object_set_props(obj,
+ *                          &err,
+ *                          "share", "yes",
+ *                          "mem-path", "/dev/shm/somefile",
+ *                          "prealloc", "yes",
+ *                          "size", "1048576",
+ *                          NULL);
+ *
+ *   if (!obj) {
+ *     g_printerr("Cannot set properties: %s\n",
+ *                error_get_pretty(err));
+ *   }
+ *   </programlisting>
+ * </example>
+ *
+ * The returned object will have one stable reference maintained
+ * for as long as it is present in the object hierarchy.
+ *
+ * Returns: -1 on error, 0 on success
+ */
+int object_set_props(Object *obj,
+                     Error **errp,
+                     ...) QEMU_SENTINEL;
+
+/**
+ * object_set_propv:
+ * @obj: the object instance to set properties on
+ * @errp: pointer to error object
+ * @vargs: list of property names and values
+ *
+ * See object_set_props() for documentation.
+ *
+ * Returns: -1 on error, 0 on success
+ */
+int object_set_propv(Object *obj,
+                     Error **errp,
+                     va_list vargs);
+
+/**
+ * object_initialize_with_type:
+ * @data: A pointer to the memory to be used for the object.
+ * @size: The maximum size available at @data for the object.
+ * @type: The type of the object to instantiate.
+ *
+ * This function will initialize an object.  The memory for the object should
+ * have already been allocated.  The returned object has a reference count of 1,
+ * and will be finalized when the last reference is dropped.
+ */
+void object_initialize_with_type(void *data, size_t size, Type type);
+
+/**
+ * object_initialize:
+ * @obj: A pointer to the memory to be used for the object.
+ * @size: The maximum size available at @obj for the object.
+ * @typename: The name of the type of the object to instantiate.
+ *
+ * This function will initialize an object.  The memory for the object should
+ * have already been allocated.  The returned object has a reference count of 1,
+ * and will be finalized when the last reference is dropped.
+ */
+void object_initialize(void *obj, size_t size, const char *typename);
+
+/**
+ * object_dynamic_cast:
+ * @obj: The object to cast.
+ * @typename: The @typename to cast to.
+ *
+ * This function will determine if @obj is-a @typename.  @obj can refer to an
+ * object or an interface associated with an object.
+ *
+ * Returns: This function returns @obj on success or #NULL on failure.
+ */
+Object *object_dynamic_cast(Object *obj, const char *typename);
+
+/**
+ * object_dynamic_cast_assert:
+ *
+ * See object_dynamic_cast() for a description of the parameters of this
+ * function.  The only difference in behavior is that this function asserts
+ * instead of returning #NULL on failure if QOM cast debugging is enabled.
+ * This function is not meant to be called directly, but only through
+ * the wrapper macro OBJECT_CHECK.
+ */
+Object *object_dynamic_cast_assert(Object *obj, const char *typename,
+                                   const char *file, int line, const char *func);
+
+/**
+ * object_get_class:
+ * @obj: A derivative of #Object
+ *
+ * Returns: The #ObjectClass of the type associated with @obj.
+ */
+ObjectClass *object_get_class(Object *obj);
+
+/**
+ * object_get_typename:
+ * @obj: A derivative of #Object.
+ *
+ * Returns: The QOM typename of @obj.
+ */
+const char *object_get_typename(Object *obj);
+
+/**
+ * type_register_static:
+ * @info: The #TypeInfo of the new type.
+ *
+ * @info and all of the strings it points to should exist for the life time
+ * that the type is registered.
+ *
+ * Returns: 0 on failure, the new #Type on success.
+ */
+Type type_register_static(const TypeInfo *info);
+
+/**
+ * type_register:
+ * @info: The #TypeInfo of the new type
+ *
+ * Unlike type_register_static(), this call does not require @info or its
+ * string members to continue to exist after the call returns.
+ *
+ * Returns: 0 on failure, the new #Type on success.
+ */
+Type type_register(const TypeInfo *info);
+
+/**
+ * object_class_dynamic_cast_assert:
+ * @klass: The #ObjectClass to attempt to cast.
+ * @typename: The QOM typename of the class to cast to.
+ *
+ * See object_class_dynamic_cast() for a description of the parameters
+ * of this function.  The only difference in behavior is that this function
+ * asserts instead of returning #NULL on failure if QOM cast debugging is
+ * enabled.  This function is not meant to be called directly, but only through
+ * the wrapper macros OBJECT_CLASS_CHECK and INTERFACE_CHECK.
+ */
+ObjectClass *object_class_dynamic_cast_assert(ObjectClass *klass,
+                                              const char *typename,
+                                              const char *file, int line,
+                                              const char *func);
+
+/**
+ * object_class_dynamic_cast:
+ * @klass: The #ObjectClass to attempt to cast.
+ * @typename: The QOM typename of the class to cast to.
+ *
+ * Returns: If @typename is a class, this function returns @klass if
+ * @typename is a subtype of @klass, else returns #NULL.
+ *
+ * If @typename is an interface, this function returns the interface
+ * definition for @klass if @klass implements it unambiguously; #NULL
+ * is returned if @klass does not implement the interface or if multiple
+ * classes or interfaces on the hierarchy leading to @klass implement
+ * it.  (FIXME: perhaps this can be detected at type definition time?)
+ */
+ObjectClass *object_class_dynamic_cast(ObjectClass *klass,
+                                       const char *typename);
+
+/**
+ * object_class_get_parent:
+ * @klass: The class to obtain the parent for.
+ *
+ * Returns: The parent for @klass or %NULL if none.
+ */
+ObjectClass *object_class_get_parent(ObjectClass *klass);
+
+/**
+ * object_class_get_name:
+ * @klass: The class to obtain the QOM typename for.
+ *
+ * Returns: The QOM typename for @klass.
+ */
+const char *object_class_get_name(ObjectClass *klass);
+
+/**
+ * object_class_is_abstract:
+ * @klass: The class to obtain the abstractness for.
+ *
+ * Returns: %true if @klass is abstract, %false otherwise.
+ */
+bool object_class_is_abstract(ObjectClass *klass);
+
+/**
+ * object_class_by_name:
+ * @typename: The QOM typename to obtain the class for.
+ *
+ * Returns: The class for @typename or %NULL if not found.
+ */
+ObjectClass *object_class_by_name(const char *typename);
+
+void object_class_foreach(void (*fn)(ObjectClass *klass, void *opaque),
+                          const char *implements_type, bool include_abstract,
+                          void *opaque);
+
+/**
+ * object_class_get_list:
+ * @implements_type: The type to filter for, including its derivatives.
+ * @include_abstract: Whether to include abstract classes.
+ *
+ * Returns: A singly-linked list of the classes in reverse hashtable order.
+ */
+GSList *object_class_get_list(const char *implements_type,
+                              bool include_abstract);
+
+/**
+ * object_ref:
+ * @obj: the object
+ *
+ * Increase the reference count of a object.  A object cannot be freed as long
+ * as its reference count is greater than zero.
+ */
+void object_ref(Object *obj);
+
+/**
+ * qdef_unref:
+ * @obj: the object
+ *
+ * Decrease the reference count of a object.  A object cannot be freed as long
+ * as its reference count is greater than zero.
+ */
+void object_unref(Object *obj);
+
+/**
+ * object_property_add:
+ * @obj: the object to add a property to
+ * @name: the name of the property.  This can contain any character except for
+ *  a forward slash.  In general, you should use hyphens '-' instead of
+ *  underscores '_' when naming properties.
+ * @type: the type name of the property.  This namespace is pretty loosely
+ *   defined.  Sub namespaces are constructed by using a prefix and then
+ *   to angle brackets.  For instance, the type 'virtio-net-pci' in the
+ *   'link' namespace would be 'link<virtio-net-pci>'.
+ * @get: The getter to be called to read a property.  If this is NULL, then
+ *   the property cannot be read.
+ * @set: the setter to be called to write a property.  If this is NULL,
+ *   then the property cannot be written.
+ * @release: called when the property is removed from the object.  This is
+ *   meant to allow a property to free its opaque upon object
+ *   destruction.  This may be NULL.
+ * @opaque: an opaque pointer to pass to the callbacks for the property
+ * @errp: returns an error if this function fails
+ *
+ * Returns: The #ObjectProperty; this can be used to set the @resolve
+ * callback for child and link properties.
+ */
+ObjectProperty *object_property_add(Object *obj, const char *name,
+                                    const char *type,
+                                    ObjectPropertyAccessor *get,
+                                    ObjectPropertyAccessor *set,
+                                    ObjectPropertyRelease *release,
+                                    void *opaque, Error **errp);
+
+void object_property_del(Object *obj, const char *name, Error **errp);
+
+/**
+ * object_property_find:
+ * @obj: the object
+ * @name: the name of the property
+ * @errp: returns an error if this function fails
+ *
+ * Look up a property for an object and return its #ObjectProperty if found.
+ */
+ObjectProperty *object_property_find(Object *obj, const char *name,
+                                     Error **errp);
+
+void object_unparent(Object *obj);
+
+/**
+ * object_property_get:
+ * @obj: the object
+ * @v: the visitor that will receive the property value.  This should be an
+ *   Output visitor and the data will be written with @name as the name.
+ * @name: the name of the property
+ * @errp: returns an error if this function fails
+ *
+ * Reads a property from a object.
+ */
+void object_property_get(Object *obj, struct Visitor *v, const char *name,
+                         Error **errp);
+
+/**
+ * object_property_set_str:
+ * @value: the value to be written to the property
+ * @name: the name of the property
+ * @errp: returns an error if this function fails
+ *
+ * Writes a string value to a property.
+ */
+void object_property_set_str(Object *obj, const char *value,
+                             const char *name, Error **errp);
+
+/**
+ * object_property_get_str:
+ * @obj: the object
+ * @name: the name of the property
+ * @errp: returns an error if this function fails
+ *
+ * Returns: the value of the property, converted to a C string, or NULL if
+ * an error occurs (including when the property value is not a string).
+ * The caller should free the string.
+ */
+char *object_property_get_str(Object *obj, const char *name,
+                              Error **errp);
+
+/**
+ * object_property_set_link:
+ * @value: the value to be written to the property
+ * @name: the name of the property
+ * @errp: returns an error if this function fails
+ *
+ * Writes an object's canonical path to a property.
+ */
+void object_property_set_link(Object *obj, Object *value,
+                              const char *name, Error **errp);
+
+/**
+ * object_property_get_link:
+ * @obj: the object
+ * @name: the name of the property
+ * @errp: returns an error if this function fails
+ *
+ * Returns: the value of the property, resolved from a path to an Object,
+ * or NULL if an error occurs (including when the property value is not a
+ * string or not a valid object path).
+ */
+Object *object_property_get_link(Object *obj, const char *name,
+                                 Error **errp);
+
+/**
+ * object_property_set_bool:
+ * @value: the value to be written to the property
+ * @name: the name of the property
+ * @errp: returns an error if this function fails
+ *
+ * Writes a bool value to a property.
+ */
+void object_property_set_bool(Object *obj, bool value,
+                              const char *name, Error **errp);
+
+/**
+ * object_property_get_bool:
+ * @obj: the object
+ * @name: the name of the property
+ * @errp: returns an error if this function fails
+ *
+ * Returns: the value of the property, converted to a boolean, or NULL if
+ * an error occurs (including when the property value is not a bool).
+ */
+bool object_property_get_bool(Object *obj, const char *name,
+                              Error **errp);
+
+/**
+ * object_property_set_int:
+ * @value: the value to be written to the property
+ * @name: the name of the property
+ * @errp: returns an error if this function fails
+ *
+ * Writes an integer value to a property.
+ */
+void object_property_set_int(Object *obj, int64_t value,
+                             const char *name, Error **errp);
+
+/**
+ * object_property_get_int:
+ * @obj: the object
+ * @name: the name of the property
+ * @errp: returns an error if this function fails
+ *
+ * Returns: the value of the property, converted to an integer, or NULL if
+ * an error occurs (including when the property value is not an integer).
+ */
+int64_t object_property_get_int(Object *obj, const char *name,
+                                Error **errp);
+
+/**
+ * object_property_get_enum:
+ * @obj: the object
+ * @name: the name of the property
+ * @typename: the name of the enum data type
+ * @errp: returns an error if this function fails
+ *
+ * Returns: the value of the property, converted to an integer, or
+ * undefined if an error occurs (including when the property value is not
+ * an enum).
+ */
+int object_property_get_enum(Object *obj, const char *name,
+                             const char *typename, Error **errp);
+
+/**
+ * object_property_get_uint16List:
+ * @obj: the object
+ * @name: the name of the property
+ * @list: the returned int list
+ * @errp: returns an error if this function fails
+ *
+ * Returns: the value of the property, converted to integers, or
+ * undefined if an error occurs (including when the property value is not
+ * an list of integers).
+ */
+void object_property_get_uint16List(Object *obj, const char *name,
+                                    uint16List **list, Error **errp);
+
+/**
+ * object_property_set:
+ * @obj: the object
+ * @v: the visitor that will be used to write the property value.  This should
+ *   be an Input visitor and the data will be first read with @name as the
+ *   name and then written as the property value.
+ * @name: the name of the property
+ * @errp: returns an error if this function fails
+ *
+ * Writes a property to a object.
+ */
+void object_property_set(Object *obj, struct Visitor *v, const char *name,
+                         Error **errp);
+
+/**
+ * object_property_parse:
+ * @obj: the object
+ * @string: the string that will be used to parse the property value.
+ * @name: the name of the property
+ * @errp: returns an error if this function fails
+ *
+ * Parses a string and writes the result into a property of an object.
+ */
+void object_property_parse(Object *obj, const char *string,
+                           const char *name, Error **errp);
+
+/**
+ * object_property_print:
+ * @obj: the object
+ * @name: the name of the property
+ * @human: if true, print for human consumption
+ * @errp: returns an error if this function fails
+ *
+ * Returns a string representation of the value of the property.  The
+ * caller shall free the string.
+ */
+char *object_property_print(Object *obj, const char *name, bool human,
+                            Error **errp);
+
+/**
+ * object_property_get_type:
+ * @obj: the object
+ * @name: the name of the property
+ * @errp: returns an error if this function fails
+ *
+ * Returns:  The type name of the property.
+ */
+const char *object_property_get_type(Object *obj, const char *name,
+                                     Error **errp);
+
+/**
+ * object_get_root:
+ *
+ * Returns: the root object of the composition tree
+ */
+Object *object_get_root(void);
+
+
+/**
+ * object_get_objects_root:
+ *
+ * Get the container object that holds user created
+ * object instances. This is the object at path
+ * "/objects"
+ *
+ * Returns: the user object container
+ */
+Object *object_get_objects_root(void);
+
+/**
+ * object_get_canonical_path_component:
+ *
+ * Returns: The final component in the object's canonical path.  The canonical
+ * path is the path within the composition tree starting from the root.
+ */
+gchar *object_get_canonical_path_component(Object *obj);
+
+/**
+ * object_get_canonical_path:
+ *
+ * Returns: The canonical path for a object.  This is the path within the
+ * composition tree starting from the root.
+ */
+gchar *object_get_canonical_path(Object *obj);
+
+/**
+ * object_resolve_path:
+ * @path: the path to resolve
+ * @ambiguous: returns true if the path resolution failed because of an
+ *   ambiguous match
+ *
+ * There are two types of supported paths--absolute paths and partial paths.
+ * 
+ * Absolute paths are derived from the root object and can follow child<> or
+ * link<> properties.  Since they can follow link<> properties, they can be
+ * arbitrarily long.  Absolute paths look like absolute filenames and are
+ * prefixed with a leading slash.
+ * 
+ * Partial paths look like relative filenames.  They do not begin with a
+ * prefix.  The matching rules for partial paths are subtle but designed to make
+ * specifying objects easy.  At each level of the composition tree, the partial
+ * path is matched as an absolute path.  The first match is not returned.  At
+ * least two matches are searched for.  A successful result is only returned if
+ * only one match is found.  If more than one match is found, a flag is
+ * returned to indicate that the match was ambiguous.
+ *
+ * Returns: The matched object or NULL on path lookup failure.
+ */
+Object *object_resolve_path(const char *path, bool *ambiguous);
+
+/**
+ * object_resolve_path_type:
+ * @path: the path to resolve
+ * @typename: the type to look for.
+ * @ambiguous: returns true if the path resolution failed because of an
+ *   ambiguous match
+ *
+ * This is similar to object_resolve_path.  However, when looking for a
+ * partial path only matches that implement the given type are considered.
+ * This restricts the search and avoids spuriously flagging matches as
+ * ambiguous.
+ *
+ * For both partial and absolute paths, the return value goes through
+ * a dynamic cast to @typename.  This is important if either the link,
+ * or the typename itself are of interface types.
+ *
+ * Returns: The matched object or NULL on path lookup failure.
+ */
+Object *object_resolve_path_type(const char *path, const char *typename,
+                                 bool *ambiguous);
+
+/**
+ * object_resolve_path_component:
+ * @parent: the object in which to resolve the path
+ * @part: the component to resolve.
+ *
+ * This is similar to object_resolve_path with an absolute path, but it
+ * only resolves one element (@part) and takes the others from @parent.
+ *
+ * Returns: The resolved object or NULL on path lookup failure.
+ */
+Object *object_resolve_path_component(Object *parent, const gchar *part);
+
+/**
+ * object_property_add_child:
+ * @obj: the object to add a property to
+ * @name: the name of the property
+ * @child: the child object
+ * @errp: if an error occurs, a pointer to an area to store the area
+ *
+ * Child properties form the composition tree.  All objects need to be a child
+ * of another object.  Objects can only be a child of one object.
+ *
+ * There is no way for a child to determine what its parent is.  It is not
+ * a bidirectional relationship.  This is by design.
+ *
+ * The value of a child property as a C string will be the child object's
+ * canonical path. It can be retrieved using object_property_get_str().
+ * The child object itself can be retrieved using object_property_get_link().
+ */
+void object_property_add_child(Object *obj, const char *name,
+                               Object *child, Error **errp);
+
+typedef enum {
+    /* Unref the link pointer when the property is deleted */
+    OBJ_PROP_LINK_UNREF_ON_RELEASE = 0x1,
+} ObjectPropertyLinkFlags;
+
+/**
+ * object_property_allow_set_link:
+ *
+ * The default implementation of the object_property_add_link() check()
+ * callback function.  It allows the link property to be set and never returns
+ * an error.
+ */
+void object_property_allow_set_link(Object *, const char *,
+                                    Object *, Error **);
+
+/**
+ * object_property_add_link:
+ * @obj: the object to add a property to
+ * @name: the name of the property
+ * @type: the qobj type of the link
+ * @child: a pointer to where the link object reference is stored
+ * @check: callback to veto setting or NULL if the property is read-only
+ * @flags: additional options for the link
+ * @errp: if an error occurs, a pointer to an area to store the area
+ *
+ * Links establish relationships between objects.  Links are unidirectional
+ * although two links can be combined to form a bidirectional relationship
+ * between objects.
+ *
+ * Links form the graph in the object model.
+ *
+ * The <code>@check()</code> callback is invoked when
+ * object_property_set_link() is called and can raise an error to prevent the
+ * link being set.  If <code>@check</code> is NULL, the property is read-only
+ * and cannot be set.
+ *
+ * Ownership of the pointer that @child points to is transferred to the
+ * link property.  The reference count for <code>*@child</code> is
+ * managed by the property from after the function returns till the
+ * property is deleted with object_property_del().  If the
+ * <code>@flags</code> <code>OBJ_PROP_LINK_UNREF_ON_RELEASE</code> bit is set,
+ * the reference count is decremented when the property is deleted.
+ */
+void object_property_add_link(Object *obj, const char *name,
+                              const char *type, Object **child,
+                              void (*check)(Object *obj, const char *name,
+                                            Object *val, Error **errp),
+                              ObjectPropertyLinkFlags flags,
+                              Error **errp);
+
+/**
+ * object_property_add_str:
+ * @obj: the object to add a property to
+ * @name: the name of the property
+ * @get: the getter or NULL if the property is write-only.  This function must
+ *   return a string to be freed by g_free().
+ * @set: the setter or NULL if the property is read-only
+ * @errp: if an error occurs, a pointer to an area to store the error
+ *
+ * Add a string property using getters/setters.  This function will add a
+ * property of type 'string'.
+ */
+void object_property_add_str(Object *obj, const char *name,
+                             char *(*get)(Object *, Error **),
+                             void (*set)(Object *, const char *, Error **),
+                             Error **errp);
+
+/**
+ * object_property_add_bool:
+ * @obj: the object to add a property to
+ * @name: the name of the property
+ * @get: the getter or NULL if the property is write-only.
+ * @set: the setter or NULL if the property is read-only
+ * @errp: if an error occurs, a pointer to an area to store the error
+ *
+ * Add a bool property using getters/setters.  This function will add a
+ * property of type 'bool'.
+ */
+void object_property_add_bool(Object *obj, const char *name,
+                              bool (*get)(Object *, Error **),
+                              void (*set)(Object *, bool, Error **),
+                              Error **errp);
+
+/**
+ * object_property_add_enum:
+ * @obj: the object to add a property to
+ * @name: the name of the property
+ * @typename: the name of the enum data type
+ * @get: the getter or %NULL if the property is write-only.
+ * @set: the setter or %NULL if the property is read-only
+ * @errp: if an error occurs, a pointer to an area to store the error
+ *
+ * Add an enum property using getters/setters.  This function will add a
+ * property of type '@typename'.
+ */
+void object_property_add_enum(Object *obj, const char *name,
+                              const char *typename,
+                              const char * const *strings,
+                              int (*get)(Object *, Error **),
+                              void (*set)(Object *, int, Error **),
+                              Error **errp);
+
+/**
+ * object_property_add_tm:
+ * @obj: the object to add a property to
+ * @name: the name of the property
+ * @get: the getter or NULL if the property is write-only.
+ * @errp: if an error occurs, a pointer to an area to store the error
+ *
+ * Add a read-only struct tm valued property using a getter function.
+ * This function will add a property of type 'struct tm'.
+ */
+void object_property_add_tm(Object *obj, const char *name,
+                            void (*get)(Object *, struct tm *, Error **),
+                            Error **errp);
+
+/**
+ * object_property_add_uint8_ptr:
+ * @obj: the object to add a property to
+ * @name: the name of the property
+ * @v: pointer to value
+ * @errp: if an error occurs, a pointer to an area to store the error
+ *
+ * Add an integer property in memory.  This function will add a
+ * property of type 'uint8'.
+ */
+void object_property_add_uint8_ptr(Object *obj, const char *name,
+                                   const uint8_t *v, Error **errp);
+
+/**
+ * object_property_add_uint16_ptr:
+ * @obj: the object to add a property to
+ * @name: the name of the property
+ * @v: pointer to value
+ * @errp: if an error occurs, a pointer to an area to store the error
+ *
+ * Add an integer property in memory.  This function will add a
+ * property of type 'uint16'.
+ */
+void object_property_add_uint16_ptr(Object *obj, const char *name,
+                                    const uint16_t *v, Error **errp);
+
+/**
+ * object_property_add_uint32_ptr:
+ * @obj: the object to add a property to
+ * @name: the name of the property
+ * @v: pointer to value
+ * @errp: if an error occurs, a pointer to an area to store the error
+ *
+ * Add an integer property in memory.  This function will add a
+ * property of type 'uint32'.
+ */
+void object_property_add_uint32_ptr(Object *obj, const char *name,
+                                    const uint32_t *v, Error **errp);
+
+/**
+ * object_property_add_uint64_ptr:
+ * @obj: the object to add a property to
+ * @name: the name of the property
+ * @v: pointer to value
+ * @errp: if an error occurs, a pointer to an area to store the error
+ *
+ * Add an integer property in memory.  This function will add a
+ * property of type 'uint64'.
+ */
+void object_property_add_uint64_ptr(Object *obj, const char *name,
+                                    const uint64_t *v, Error **Errp);
+
+/**
+ * object_property_add_alias:
+ * @obj: the object to add a property to
+ * @name: the name of the property
+ * @target_obj: the object to forward property access to
+ * @target_name: the name of the property on the forwarded object
+ * @errp: if an error occurs, a pointer to an area to store the error
+ *
+ * Add an alias for a property on an object.  This function will add a property
+ * of the same type as the forwarded property.
+ *
+ * The caller must ensure that <code>@target_obj</code> stays alive as long as
+ * this property exists.  In the case of a child object or an alias on the same
+ * object this will be the case.  For aliases to other objects the caller is
+ * responsible for taking a reference.
+ */
+void object_property_add_alias(Object *obj, const char *name,
+                               Object *target_obj, const char *target_name,
+                               Error **errp);
+
+/**
+ * object_property_add_const_link:
+ * @obj: the object to add a property to
+ * @name: the name of the property
+ * @target: the object to be referred by the link
+ * @errp: if an error occurs, a pointer to an area to store the error
+ *
+ * Add an unmodifiable link for a property on an object.  This function will
+ * add a property of type link<TYPE> where TYPE is the type of @target.
+ *
+ * The caller must ensure that @target stays alive as long as
+ * this property exists.  In the case @target is a child of @obj,
+ * this will be the case.  Otherwise, the caller is responsible for
+ * taking a reference.
+ */
+void object_property_add_const_link(Object *obj, const char *name,
+                                    Object *target, Error **errp);
+
+/**
+ * object_property_set_description:
+ * @obj: the object owning the property
+ * @name: the name of the property
+ * @description: the description of the property on the object
+ * @errp: if an error occurs, a pointer to an area to store the error
+ *
+ * Set an object property's description.
+ *
+ */
+void object_property_set_description(Object *obj, const char *name,
+                                     const char *description, Error **errp);
+
+/**
+ * object_child_foreach:
+ * @obj: the object whose children will be navigated
+ * @fn: the iterator function to be called
+ * @opaque: an opaque value that will be passed to the iterator
+ *
+ * Call @fn passing each child of @obj and @opaque to it, until @fn returns
+ * non-zero.
+ *
+ * Returns: The last value returned by @fn, or 0 if there is no child.
+ */
+int object_child_foreach(Object *obj, int (*fn)(Object *child, void *opaque),
+                         void *opaque);
+
+/**
+ * container_get:
+ * @root: root of the #path, e.g., object_get_root()
+ * @path: path to the container
+ *
+ * Return a container object whose path is @path.  Create more containers
+ * along the path if necessary.
+ *
+ * Returns: the container object.
+ */
+Object *container_get(Object *root, const char *path);
+
+
+#endif
diff --git a/include/qom/object_interfaces.h b/include/qom/object_interfaces.h
new file mode 100644
index 00000000..283ae0db
--- /dev/null
+++ b/include/qom/object_interfaces.h
@@ -0,0 +1,75 @@
+#ifndef OBJECT_INTERFACES_H
+#define OBJECT_INTERFACES_H
+
+#include "qom/object.h"
+
+#define TYPE_USER_CREATABLE "user-creatable"
+
+#define USER_CREATABLE_CLASS(klass) \
+     OBJECT_CLASS_CHECK(UserCreatableClass, (klass), \
+                        TYPE_USER_CREATABLE)
+#define USER_CREATABLE_GET_CLASS(obj) \
+     OBJECT_GET_CLASS(UserCreatableClass, (obj), \
+                      TYPE_USER_CREATABLE)
+#define USER_CREATABLE(obj) \
+     INTERFACE_CHECK(UserCreatable, (obj), \
+                     TYPE_USER_CREATABLE)
+
+
+typedef struct UserCreatable {
+    /* <private> */
+    Object Parent;
+} UserCreatable;
+
+/**
+ * UserCreatableClass:
+ * @parent_class: the base class
+ * @complete: callback to be called after @obj's properties are set.
+ * @can_be_deleted: callback to be called before an object is removed
+ * to check if @obj can be removed safely.
+ *
+ * Interface is designed to work with -object/object-add/object_add
+ * commands.
+ * Interface is mandatory for objects that are designed to be user
+ * creatable (i.e. -object/object-add/object_add, will accept only
+ * objects that inherit this interface).
+ *
+ * Interface also provides an optional ability to do the second
+ * stage * initialization of the object after its properties were
+ * set.
+ *
+ * For objects created without using -object/object-add/object_add,
+ * @user_creatable_complete() wrapper should be called manually if
+ * object's type implements USER_CREATABLE interface and needs
+ * complete() callback to be called.
+ */
+typedef struct UserCreatableClass {
+    /* <private> */
+    InterfaceClass parent_class;
+
+    /* <public> */
+    void (*complete)(UserCreatable *uc, Error **errp);
+    bool (*can_be_deleted)(UserCreatable *uc, Error **errp);
+} UserCreatableClass;
+
+/**
+ * user_creatable_complete:
+ * @obj: the object whose complete() method is called if defined
+ * @errp: if an error occurs, a pointer to an area to store the error
+ *
+ * Wrapper to call complete() method if one of types it's inherited
+ * from implements USER_CREATABLE interface, otherwise the call does
+ * nothing.
+ */
+void user_creatable_complete(Object *obj, Error **errp);
+
+/**
+ * user_creatable_can_be_deleted:
+ * @uc: the object whose can_be_deleted() method is called if implemented
+ * @errp: if an error occurs, a pointer to an area to store the error
+ *
+ * Wrapper to call can_be_deleted() method if one of types it's inherited
+ * from implements USER_CREATABLE interface.
+ */
+bool user_creatable_can_be_deleted(UserCreatable *uc, Error **errp);
+#endif
diff --git a/include/qom/qom-qobject.h b/include/qom/qom-qobject.h
new file mode 100644
index 00000000..77cd717e
--- /dev/null
+++ b/include/qom/qom-qobject.h
@@ -0,0 +1,42 @@
+/*
+ * QEMU Object Model - QObject wrappers
+ *
+ * Copyright (C) 2012 Red Hat, Inc.
+ *
+ * Author: Paolo Bonzini <pbonzini@redhat.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#ifndef QEMU_QOM_QOBJECT_H
+#define QEMU_QOM_QOBJECT_H
+
+#include "qom/object.h"
+
+/*
+ * object_property_get_qobject:
+ * @obj: the object
+ * @name: the name of the property
+ * @errp: returns an error if this function fails
+ *
+ * Returns: the value of the property, converted to QObject, or NULL if
+ * an error occurs.
+ */
+struct QObject *object_property_get_qobject(Object *obj, const char *name,
+                                            struct Error **errp);
+
+/**
+ * object_property_set_qobject:
+ * @obj: the object
+ * @ret: The value that will be written to the property.
+ * @name: the name of the property
+ * @errp: returns an error if this function fails
+ *
+ * Writes a property to a object.
+ */
+void object_property_set_qobject(Object *obj, struct QObject *qobj,
+                                 const char *name, struct Error **errp);
+
+#endif