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vfio: Change vfio_group_set_kvm() to vfio_file_set_kvm()

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Just change the argument from struct vfio_group to struct file *.

Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/6-v3-f7729924a7ea+25e33-vfio_kvm_no_group_jgg@nvidia.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Jason Gunthorpe 2022-05-04 16:14:44 -03:00 • committed by Alex Williamson
parent a905ad043f
commit ba70a89f3c
3 changed files with 32 additions and 18 deletions
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29
drivers/vfio/vfio.c
View file

@ -1731,6 +1731,27 @@ bool vfio_file_enforced_coherent(struct file *file)
}
EXPORT_SYMBOL_GPL(vfio_file_enforced_coherent);
/**
* vfio_file_set_kvm - Link a kvm with VFIO drivers
* @file: VFIO group file
* @kvm: KVM to link
*
* The kvm pointer will be forwarded to all the vfio_device's attached to the
* VFIO file via the VFIO_GROUP_NOTIFY_SET_KVM notifier.
*/
void vfio_file_set_kvm(struct file *file, struct kvm *kvm)
{
struct vfio_group *group = file->private_data;
if (file->f_op != &vfio_group_fops)
return;
group->kvm = kvm;
blocking_notifier_call_chain(&group->notifier,
VFIO_GROUP_NOTIFY_SET_KVM, kvm);
}
EXPORT_SYMBOL_GPL(vfio_file_set_kvm);
/*
* Sub-module support
*/
@ -1999,14 +2020,6 @@ static int vfio_unregister_iommu_notifier(struct vfio_group *group,
return ret;
}
void vfio_group_set_kvm(struct vfio_group *group, struct kvm *kvm)
{
group->kvm = kvm;
blocking_notifier_call_chain(&group->notifier,
VFIO_GROUP_NOTIFY_SET_KVM, kvm);
}
EXPORT_SYMBOL_GPL(vfio_group_set_kvm);
static int vfio_register_group_notifier(struct vfio_group *group,
unsigned long *events,
struct notifier_block *nb)

5
include/linux/vfio.h
View file

@ -15,6 +15,8 @@
#include <linux/poll.h>
#include <uapi/linux/vfio.h>
struct kvm;
/*
* VFIO devices can be placed in a set, this allows all devices to share this
* structure and the VFIO core will provide a lock that is held around
@ -140,6 +142,7 @@ extern struct vfio_group *vfio_group_get_external_user(struct file *filep);
extern void vfio_group_put_external_user(struct vfio_group *group);
extern struct iommu_group *vfio_file_iommu_group(struct file *file);
extern bool vfio_file_enforced_coherent(struct file *file);
extern void vfio_file_set_kvm(struct file *file, struct kvm *kvm);
#define VFIO_PIN_PAGES_MAX_ENTRIES (PAGE_SIZE/sizeof(unsigned long))
@ -170,8 +173,6 @@ extern int vfio_unregister_notifier(struct vfio_device *device,
enum vfio_notify_type type,
struct notifier_block *nb);
struct kvm;
extern void vfio_group_set_kvm(struct vfio_group *group, struct kvm *kvm);
/*
* Sub-module helpers

16
virt/kvm/vfio.c
View file

@ -62,17 +62,17 @@ static void kvm_vfio_group_put_external_user(struct vfio_group *vfio_group)
symbol_put(vfio_group_put_external_user);
}
static void kvm_vfio_group_set_kvm(struct vfio_group *group, struct kvm *kvm)
static void kvm_vfio_file_set_kvm(struct file *file, struct kvm *kvm)
{
void (*fn)(struct vfio_group *, struct kvm *);
void (*fn)(struct file *file, struct kvm *kvm);
fn = symbol_get(vfio_group_set_kvm);
fn = symbol_get(vfio_file_set_kvm);
if (!fn)
return;
fn(group, kvm);
fn(file, kvm);
symbol_put(vfio_group_set_kvm);
symbol_put(vfio_file_set_kvm);
}
static bool kvm_vfio_file_enforced_coherent(struct file *file)
@ -195,7 +195,7 @@ static int kvm_vfio_group_add(struct kvm_device *dev, unsigned int fd)
mutex_unlock(&kv->lock);
kvm_vfio_group_set_kvm(vfio_group, dev->kvm);
kvm_vfio_file_set_kvm(kvg->file, dev->kvm);
kvm_vfio_update_coherency(dev);
return 0;
@ -231,7 +231,7 @@ static int kvm_vfio_group_del(struct kvm_device *dev, unsigned int fd)
#ifdef CONFIG_SPAPR_TCE_IOMMU
kvm_spapr_tce_release_vfio_group(dev->kvm, kvg);
#endif
kvm_vfio_group_set_kvm(kvg->vfio_group, NULL);
kvm_vfio_file_set_kvm(kvg->file, NULL);
kvm_vfio_group_put_external_user(kvg->vfio_group);
fput(kvg->file);
kfree(kvg);
@ -360,7 +360,7 @@ static void kvm_vfio_destroy(struct kvm_device *dev)
#ifdef CONFIG_SPAPR_TCE_IOMMU
kvm_spapr_tce_release_vfio_group(dev->kvm, kvg);
#endif
kvm_vfio_group_set_kvm(kvg->vfio_group, NULL);
kvm_vfio_file_set_kvm(kvg->file, NULL);
kvm_vfio_group_put_external_user(kvg->vfio_group);
fput(kvg->file);
list_del(&kvg->node);