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ff2fd1f7e2
Add multifd setup/cleanup functions and an associated VFIOMultifd data structure that will contain most of the receive-side data together with its init/cleanup methods. 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/c0520523053b1087787152ddf2163257d3030be0.1741124640.git.maciej.szmigiero@oracle.com Signed-off-by: Cédric Le Goater <clg@redhat.com>
83 lines
1.8 KiB
C
83 lines
1.8 KiB
C
/*
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* Multifd VFIO migration
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*
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* Copyright (C) 2024,2025 Oracle and/or its affiliates.
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "qemu/osdep.h"
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#include "hw/vfio/vfio-common.h"
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#include "migration/misc.h"
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#include "qapi/error.h"
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#include "qemu/error-report.h"
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#include "qemu/lockable.h"
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#include "qemu/main-loop.h"
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#include "qemu/thread.h"
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#include "migration/qemu-file.h"
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#include "migration-multifd.h"
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#include "trace.h"
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#define VFIO_DEVICE_STATE_CONFIG_STATE (1)
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#define VFIO_DEVICE_STATE_PACKET_VER_CURRENT (0)
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typedef struct VFIODeviceStatePacket {
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uint32_t version;
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uint32_t idx;
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uint32_t flags;
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uint8_t data[0];
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} QEMU_PACKED VFIODeviceStatePacket;
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typedef struct VFIOMultifd {
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} VFIOMultifd;
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static VFIOMultifd *vfio_multifd_new(void)
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{
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VFIOMultifd *multifd = g_new(VFIOMultifd, 1);
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return multifd;
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}
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static void vfio_multifd_free(VFIOMultifd *multifd)
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{
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g_free(multifd);
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}
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void vfio_multifd_cleanup(VFIODevice *vbasedev)
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{
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VFIOMigration *migration = vbasedev->migration;
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g_clear_pointer(&migration->multifd, vfio_multifd_free);
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}
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bool vfio_multifd_transfer_supported(void)
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{
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return multifd_device_state_supported() &&
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migrate_send_switchover_start();
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}
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bool vfio_multifd_transfer_enabled(VFIODevice *vbasedev)
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{
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return false;
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}
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bool vfio_multifd_setup(VFIODevice *vbasedev, bool alloc_multifd, Error **errp)
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{
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VFIOMigration *migration = vbasedev->migration;
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if (!vfio_multifd_transfer_enabled(vbasedev)) {
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/* Nothing further to check or do */
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return true;
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}
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if (alloc_multifd) {
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assert(!migration->multifd);
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migration->multifd = vfio_multifd_new();
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}
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return true;
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}
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