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vfio: Introduce a new header file for internal migration services

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Gather all VFIO migration related declarations into
"vfio-migration-internal.h" to reduce exposure of VFIO internals in
"hw/vfio/vfio-common.h".

Cc: Kirti Wankhede <kwankhede@nvidia.com>
Cc: Avihai Horon <avihaih@nvidia.com>
Reviewed-by: Prasad Pandit <pjp@fedoraproject.org>
Reviewed-by: John Levon <john.levon@nutanix.com>
Reviewed-by: Avihai Horon <avihaih@nvidia.com>
Link: https://lore.kernel.org/qemu-devel/20250326075122.1299361-7-clg@redhat.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>
This commit is contained in:
Cédric Le Goater 2025-03-26 08:50:51 +01:00
parent d04a35cb74
commit b553d2c414
6 changed files with 77 additions and 52 deletions
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52
include/hw/vfio/vfio-common.h
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@ -23,7 +23,6 @@
#include "system/memory.h"
#include "qemu/queue.h"
#include "qemu/notify.h"
#include "ui/console.h"
#include "hw/display/ramfb.h"
#ifdef CONFIG_LINUX
@ -36,23 +35,6 @@
#define VFIO_MSG_PREFIX "vfio %s: "
/*
* Flags to be used as unique delimiters for VFIO devices in the migration
* stream. These flags are composed as:
* 0xffffffff => MSB 32-bit all 1s
* 0xef10 => Magic ID, represents emulated (virtual) function IO
* 0x0000 => 16-bits reserved for flags
*
* The beginning of state information is marked by _DEV_CONFIG_STATE,
* _DEV_SETUP_STATE, or _DEV_DATA_STATE, respectively. The end of a
* certain state information is marked by _END_OF_STATE.
*/
#define VFIO_MIG_FLAG_END_OF_STATE (0xffffffffef100001ULL)
#define VFIO_MIG_FLAG_DEV_CONFIG_STATE (0xffffffffef100002ULL)
#define VFIO_MIG_FLAG_DEV_SETUP_STATE (0xffffffffef100003ULL)
#define VFIO_MIG_FLAG_DEV_DATA_STATE (0xffffffffef100004ULL)
#define VFIO_MIG_FLAG_DEV_INIT_DATA_SENT (0xffffffffef100005ULL)
enum {
VFIO_DEVICE_TYPE_PCI = 0,
VFIO_DEVICE_TYPE_PLATFORM = 1,
@ -78,27 +60,6 @@ typedef struct VFIORegion {
uint8_t nr; /* cache the region number for debug */
} VFIORegion;
typedef struct VFIOMultifd VFIOMultifd;
typedef struct VFIOMigration {
struct VFIODevice *vbasedev;
VMChangeStateEntry *vm_state;
NotifierWithReturn migration_state;
uint32_t device_state;
int data_fd;
void *data_buffer;
size_t data_buffer_size;
uint64_t mig_flags;
uint64_t precopy_init_size;
uint64_t precopy_dirty_size;
bool multifd_transfer;
VFIOMultifd *multifd;
bool initial_data_sent;
bool event_save_iterate_started;
bool event_precopy_empty_hit;
} VFIOMigration;
struct VFIOGroup;
typedef struct VFIOContainer {
@ -136,6 +97,7 @@ typedef struct VFIOIOMMUFDContainer {
OBJECT_DECLARE_SIMPLE_TYPE(VFIOIOMMUFDContainer, VFIO_IOMMU_IOMMUFD);
typedef struct VFIODeviceOps VFIODeviceOps;
typedef struct VFIOMigration VFIOMigration;
typedef struct VFIODevice {
QLIST_ENTRY(VFIODevice) next;
@ -290,13 +252,9 @@ extern VFIODeviceList vfio_device_list;
extern const MemoryListener vfio_memory_listener;
extern int vfio_kvm_device_fd;
void vfio_migration_add_bytes_transferred(unsigned long val);
bool vfio_device_state_is_running(VFIODevice *vbasedev);
bool vfio_device_state_is_precopy(VFIODevice *vbasedev);
int vfio_save_device_config_state(QEMUFile *f, void *opaque, Error **errp);
int vfio_load_device_config_state(QEMUFile *f, void *opaque);
#ifdef CONFIG_LINUX
int vfio_get_region_info(VFIODevice *vbasedev, int index,
struct vfio_region_info **info);
@ -311,16 +269,8 @@ struct vfio_info_cap_header *
vfio_get_device_info_cap(struct vfio_device_info *info, uint16_t id);
struct vfio_info_cap_header *
vfio_get_cap(void *ptr, uint32_t cap_offset, uint16_t id);
int vfio_migration_set_state(VFIODevice *vbasedev,
enum vfio_device_mig_state new_state,
enum vfio_device_mig_state recover_state,
Error **errp);
#endif
bool vfio_migration_realize(VFIODevice *vbasedev, Error **errp);
void vfio_migration_exit(VFIODevice *vbasedev);
int vfio_bitmap_alloc(VFIOBitmap *vbmap, hwaddr size);
bool vfio_devices_all_dirty_tracking_started(
const VFIOContainerBase *bcontainer);