qemu/hw/hw.h
Chris Lalancette 8a43b1ea7f Allow monitor interaction when using migrate -exec
All,
     I've recently been playing around with migration via exec.  Unfortunately,
when starting the incoming qemu process with "-incoming exec:cmd", it suffers
the same problem that -incoming tcp used to suffer; namely, that you can't
interact with the monitor until after the migration has happened.  This causes
problems for libvirt usage of -incoming exec, since libvirt expects to be able
to access the monitor ahead of time.  This fairly simple patch allows you to
access the monitor both before and after the migration has completed using exec.

(note: developed/tested with qemu-kvm, but applies perfectly fine to qemu)

Signed-off-by: Chris Lalancette <clalance@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-05-27 09:46:07 -05:00

274 lines
7.8 KiB
C

/* Declarations for use by hardware emulation. */
#ifndef QEMU_HW_H
#define QEMU_HW_H
#include "qemu-common.h"
#if defined(TARGET_PHYS_ADDR_BITS) && !defined(NEED_CPU_H)
#include "targphys.h"
#include "poison.h"
#include "cpu-common.h"
#endif
#include "irq.h"
/* VM Load/Save */
/* This function writes a chunk of data to a file at the given position.
* The pos argument can be ignored if the file is only being used for
* streaming. The handler should try to write all of the data it can.
*/
typedef int (QEMUFilePutBufferFunc)(void *opaque, const uint8_t *buf,
int64_t pos, int size);
/* Read a chunk of data from a file at the given position. The pos argument
* can be ignored if the file is only be used for streaming. The number of
* bytes actually read should be returned.
*/
typedef int (QEMUFileGetBufferFunc)(void *opaque, uint8_t *buf,
int64_t pos, int size);
/* Close a file and return an error code */
typedef int (QEMUFileCloseFunc)(void *opaque);
/* Called to determine if the file has exceeded it's bandwidth allocation. The
* bandwidth capping is a soft limit, not a hard limit.
*/
typedef int (QEMUFileRateLimit)(void *opaque);
/* Called to change the current bandwidth allocation. This function must return
* the new actual bandwidth. It should be new_rate if everything goes ok, and
* the old rate otherwise
*/
typedef size_t (QEMUFileSetRateLimit)(void *opaque, size_t new_rate);
QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer,
QEMUFileGetBufferFunc *get_buffer,
QEMUFileCloseFunc *close,
QEMUFileRateLimit *rate_limit,
QEMUFileSetRateLimit *set_rate_limit);
QEMUFile *qemu_fopen(const char *filename, const char *mode);
QEMUFile *qemu_fopen_socket(int fd);
QEMUFile *qemu_popen(FILE *popen_file, const char *mode);
QEMUFile *qemu_popen_cmd(const char *command, const char *mode);
int qemu_popen_fd(QEMUFile *f);
void qemu_fflush(QEMUFile *f);
int qemu_fclose(QEMUFile *f);
void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size);
void qemu_put_byte(QEMUFile *f, int v);
static inline void qemu_put_ubyte(QEMUFile *f, unsigned int v)
{
qemu_put_byte(f, (int)v);
}
#define qemu_put_sbyte qemu_put_byte
void qemu_put_be16(QEMUFile *f, unsigned int v);
void qemu_put_be32(QEMUFile *f, unsigned int v);
void qemu_put_be64(QEMUFile *f, uint64_t v);
int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size);
int qemu_get_byte(QEMUFile *f);
static inline unsigned int qemu_get_ubyte(QEMUFile *f)
{
return (unsigned int)qemu_get_byte(f);
}
#define qemu_get_sbyte qemu_get_byte
unsigned int qemu_get_be16(QEMUFile *f);
unsigned int qemu_get_be32(QEMUFile *f);
uint64_t qemu_get_be64(QEMUFile *f);
int qemu_file_rate_limit(QEMUFile *f);
size_t qemu_file_set_rate_limit(QEMUFile *f, size_t new_rate);
int qemu_file_has_error(QEMUFile *f);
void qemu_file_set_error(QEMUFile *f);
/* Try to send any outstanding data. This function is useful when output is
* halted due to rate limiting or EAGAIN errors occur as it can be used to
* resume output. */
void qemu_file_put_notify(QEMUFile *f);
static inline void qemu_put_be64s(QEMUFile *f, const uint64_t *pv)
{
qemu_put_be64(f, *pv);
}
static inline void qemu_put_be32s(QEMUFile *f, const uint32_t *pv)
{
qemu_put_be32(f, *pv);
}
static inline void qemu_put_be16s(QEMUFile *f, const uint16_t *pv)
{
qemu_put_be16(f, *pv);
}
static inline void qemu_put_8s(QEMUFile *f, const uint8_t *pv)
{
qemu_put_byte(f, *pv);
}
static inline void qemu_get_be64s(QEMUFile *f, uint64_t *pv)
{
*pv = qemu_get_be64(f);
}
static inline void qemu_get_be32s(QEMUFile *f, uint32_t *pv)
{
*pv = qemu_get_be32(f);
}
static inline void qemu_get_be16s(QEMUFile *f, uint16_t *pv)
{
*pv = qemu_get_be16(f);
}
static inline void qemu_get_8s(QEMUFile *f, uint8_t *pv)
{
*pv = qemu_get_byte(f);
}
// Signed versions for type safety
static inline void qemu_put_sbuffer(QEMUFile *f, const int8_t *buf, int size)
{
qemu_put_buffer(f, (const uint8_t *)buf, size);
}
static inline void qemu_put_sbe16(QEMUFile *f, int v)
{
qemu_put_be16(f, (unsigned int)v);
}
static inline void qemu_put_sbe32(QEMUFile *f, int v)
{
qemu_put_be32(f, (unsigned int)v);
}
static inline void qemu_put_sbe64(QEMUFile *f, int64_t v)
{
qemu_put_be64(f, (uint64_t)v);
}
static inline size_t qemu_get_sbuffer(QEMUFile *f, int8_t *buf, int size)
{
return qemu_get_buffer(f, (uint8_t *)buf, size);
}
static inline int qemu_get_sbe16(QEMUFile *f)
{
return (int)qemu_get_be16(f);
}
static inline int qemu_get_sbe32(QEMUFile *f)
{
return (int)qemu_get_be32(f);
}
static inline int64_t qemu_get_sbe64(QEMUFile *f)
{
return (int64_t)qemu_get_be64(f);
}
static inline void qemu_put_s8s(QEMUFile *f, const int8_t *pv)
{
qemu_put_8s(f, (const uint8_t *)pv);
}
static inline void qemu_put_sbe16s(QEMUFile *f, const int16_t *pv)
{
qemu_put_be16s(f, (const uint16_t *)pv);
}
static inline void qemu_put_sbe32s(QEMUFile *f, const int32_t *pv)
{
qemu_put_be32s(f, (const uint32_t *)pv);
}
static inline void qemu_put_sbe64s(QEMUFile *f, const int64_t *pv)
{
qemu_put_be64s(f, (const uint64_t *)pv);
}
static inline void qemu_get_s8s(QEMUFile *f, int8_t *pv)
{
qemu_get_8s(f, (uint8_t *)pv);
}
static inline void qemu_get_sbe16s(QEMUFile *f, int16_t *pv)
{
qemu_get_be16s(f, (uint16_t *)pv);
}
static inline void qemu_get_sbe32s(QEMUFile *f, int32_t *pv)
{
qemu_get_be32s(f, (uint32_t *)pv);
}
static inline void qemu_get_sbe64s(QEMUFile *f, int64_t *pv)
{
qemu_get_be64s(f, (uint64_t *)pv);
}
#ifdef NEED_CPU_H
#if TARGET_LONG_BITS == 64
#define qemu_put_betl qemu_put_be64
#define qemu_get_betl qemu_get_be64
#define qemu_put_betls qemu_put_be64s
#define qemu_get_betls qemu_get_be64s
#define qemu_put_sbetl qemu_put_sbe64
#define qemu_get_sbetl qemu_get_sbe64
#define qemu_put_sbetls qemu_put_sbe64s
#define qemu_get_sbetls qemu_get_sbe64s
#else
#define qemu_put_betl qemu_put_be32
#define qemu_get_betl qemu_get_be32
#define qemu_put_betls qemu_put_be32s
#define qemu_get_betls qemu_get_be32s
#define qemu_put_sbetl qemu_put_sbe32
#define qemu_get_sbetl qemu_get_sbe32
#define qemu_put_sbetls qemu_put_sbe32s
#define qemu_get_sbetls qemu_get_sbe32s
#endif
#endif
int64_t qemu_ftell(QEMUFile *f);
int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence);
typedef void SaveStateHandler(QEMUFile *f, void *opaque);
typedef int SaveLiveStateHandler(QEMUFile *f, int stage, void *opaque);
typedef int LoadStateHandler(QEMUFile *f, void *opaque, int version_id);
int register_savevm(const char *idstr,
int instance_id,
int version_id,
SaveStateHandler *save_state,
LoadStateHandler *load_state,
void *opaque);
int register_savevm_live(const char *idstr,
int instance_id,
int version_id,
SaveLiveStateHandler *save_live_state,
SaveStateHandler *save_state,
LoadStateHandler *load_state,
void *opaque);
void unregister_savevm(const char *idstr, void *opaque);
typedef void QEMUResetHandler(void *opaque);
void qemu_register_reset(QEMUResetHandler *func, int order, void *opaque);
/* handler to set the boot_device for a specific type of QEMUMachine */
/* return 0 if success */
typedef int QEMUBootSetHandler(void *opaque, const char *boot_device);
void qemu_register_boot_set(QEMUBootSetHandler *func, void *opaque);
/* These should really be in isa.h, but are here to make pc.h happy. */
typedef void (IOPortWriteFunc)(void *opaque, uint32_t address, uint32_t data);
typedef uint32_t (IOPortReadFunc)(void *opaque, uint32_t address);
#endif