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vfio/migration: Multifd device state transfer support - basic types

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Add basic types and flags used by VFIO multifd device state transfer
support.

Since we'll be introducing a lot of multifd transfer specific code,
add a new file migration-multifd.c to home it, wired into main VFIO
migration code (migration.c) via migration-multifd.h header file.

Signed-off-by: Maciej S. Szmigiero <maciej.szmigiero@oracle.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Link: https://lore.kernel.org/qemu-devel/4eedd529e6617f80f3d6a66d7268a0db2bc173fa.1741124640.git.maciej.szmigiero@oracle.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>
This commit is contained in:
Maciej S. Szmigiero 2025-03-04 23:03:49 +01:00 • committed by Cédric Le Goater
parent eb6608619a
commit 961165122b
4 changed files with 52 additions and 0 deletions
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1
hw/vfio/meson.build
View file

@ -5,6 +5,7 @@ vfio_ss.add(files(
'container-base.c',
'container.c',
'migration.c',
'migration-multifd.c',
'cpr.c',
))
vfio_ss.add(when: 'CONFIG_PSERIES', if_true: files('spapr.c'))

33
hw/vfio/migration-multifd.c Normal file
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@ -0,0 +1,33 @@
/*
* Multifd VFIO migration
*
* Copyright (C) 2024,2025 Oracle and/or its affiliates.
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "qemu/osdep.h"
#include "hw/vfio/vfio-common.h"
#include "migration/misc.h"
#include "qapi/error.h"
#include "qemu/error-report.h"
#include "qemu/lockable.h"
#include "qemu/main-loop.h"
#include "qemu/thread.h"
#include "migration/qemu-file.h"
#include "migration-multifd.h"
#include "trace.h"
#define VFIO_DEVICE_STATE_CONFIG_STATE (1)
#define VFIO_DEVICE_STATE_PACKET_VER_CURRENT (0)
typedef struct VFIODeviceStatePacket {
uint32_t version;
uint32_t idx;
uint32_t flags;
uint8_t data[0];
} QEMU_PACKED VFIODeviceStatePacket;

17
hw/vfio/migration-multifd.h Normal file
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@ -0,0 +1,17 @@
/*
* Multifd VFIO migration
*
* Copyright (C) 2024,2025 Oracle and/or its affiliates.
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#ifndef HW_VFIO_MIGRATION_MULTIFD_H
#define HW_VFIO_MIGRATION_MULTIFD_H
#include "hw/vfio/vfio-common.h"
#endif

1
hw/vfio/migration.c
View file

@ -23,6 +23,7 @@
#include "migration/qemu-file.h"
#include "migration/register.h"
#include "migration/blocker.h"
#include "migration-multifd.h"
#include "qapi/error.h"
#include "qapi/qapi-events-vfio.h"
#include "exec/ramlist.h"