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vfio/container: register container for cpr

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Register a legacy container for cpr-transfer, replacing the generic CPR
register call with a more specific legacy container register call.  Add a
blocker if the kernel does not support VFIO_UPDATE_VADDR or VFIO_UNMAP_ALL.

This is mostly boiler plate.  The fields to to saved and restored are added
in subsequent patches.

Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Link: https://lore.kernel.org/qemu-devel/1749569991-25171-4-git-send-email-steven.sistare@oracle.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>
This commit is contained in:
Steve Sistare 2025-06-10 08:39:16 -07:00 • committed by Cédric Le Goater
parent 081c09dc52
commit 54857b0816
6 changed files with 91 additions and 7 deletions
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2
include/hw/vfio/vfio-container.h
View file

@ -10,6 +10,7 @@
#define HW_VFIO_CONTAINER_H
#include "hw/vfio/vfio-container-base.h"
#include "hw/vfio/vfio-cpr.h"
typedef struct VFIOContainer VFIOContainer;
typedef struct VFIODevice VFIODevice;
@ -29,6 +30,7 @@ typedef struct VFIOContainer {
int fd; /* /dev/vfio/vfio, empowered by the attached groups */
unsigned iommu_type;
QLIST_HEAD(, VFIOGroup) group_list;
VFIOContainerCPR cpr;
} VFIOContainer;
OBJECT_DECLARE_SIMPLE_TYPE(VFIOContainer, VFIO_IOMMU_LEGACY);

15
include/hw/vfio/vfio-cpr.h
View file

@ -9,8 +9,23 @@
#ifndef HW_VFIO_VFIO_CPR_H
#define HW_VFIO_VFIO_CPR_H
#include "migration/misc.h"
struct VFIOContainer;
struct VFIOContainerBase;
typedef struct VFIOContainerCPR {
Error *blocker;
} VFIOContainerCPR;
bool vfio_legacy_cpr_register_container(struct VFIOContainer *container,
Error **errp);
void vfio_legacy_cpr_unregister_container(struct VFIOContainer *container);
int vfio_cpr_reboot_notifier(NotifierWithReturn *notifier, MigrationEvent *e,
Error **errp);
bool vfio_cpr_register_container(struct VFIOContainerBase *bcontainer,
Error **errp);
void vfio_cpr_unregister_container(struct VFIOContainerBase *bcontainer);