[Intel-gfx] [PATCH 27/29] drm/i915/gvt: remove kvmgt_guest_{init, exit}

Christoph Hellwig
2021-11-02T07:08:44Z

Merge these into their only callers.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/gpu/drm/i915/gvt/kvmgt.c | 129 ++++++++++++++-----------------
1 file changed, 60 insertions(+), 69 deletions(-)

diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c
index d3e0a3f5559db..46ab66ebbc9aa 100644
--- a/drivers/gpu/drm/i915/gvt/kvmgt.c
+++ b/drivers/gpu/drm/i915/gvt/kvmgt.c
@@ -97,6 +97,13 @@ struct gvt_dma {
struct kref ref;
};

+static void kvmgt_page_track_write(struct kvm_vcpu *vcpu, gpa_t gpa,
+ const u8 *val, int len,
+ struct kvm_page_track_notifier_node *node);
+static void kvmgt_page_track_flush_slot(struct kvm *kvm,
+ struct kvm_memory_slot *slot,
+ struct kvm_page_track_notifier_node *node);
+
static ssize_t available_instances_show(struct mdev_type *mtype,
struct mdev_type_attribute *attr,
char *buf)
@@ -195,9 +202,7 @@ void intel_gvt_cleanup_vgpu_type_groups(struct intel_gvt *gvt)
}
}

-static int kvmgt_guest_init(struct mdev_device *mdev);
static void intel_vgpu_release_work(struct work_struct *work);
-static bool kvmgt_guest_exit(struct intel_vgpu *info);

static void gvt_unpin_guest_page(struct intel_vgpu *vgpu, unsigned long gfn,
unsigned long size)
@@ -785,6 +790,27 @@ static int intel_vgpu_group_notifier(struct notifier_block *nb,
return NOTIFY_OK;
}

+static bool __kvmgt_vgpu_exist(struct intel_vgpu *vgpu)
+{
+ struct intel_vgpu *itr;
+ int id;
+ bool ret = false;
+
+ mutex_lock(&vgpu->gvt->lock);
+ for_each_active_vgpu(vgpu->gvt, itr, id) {
+ if (!itr->attached)
+ continue;
+
+ if (vgpu->kvm == itr->kvm) {
+ ret = true;
+ goto out;
+ }
+ }
+out:
+ mutex_unlock(&vgpu->gvt->lock);
+ return ret;
+}
+
static int intel_vgpu_open_device(struct mdev_device *mdev)
{
struct intel_vgpu *vgpu = mdev_get_drvdata(mdev);
@@ -829,14 +855,37 @@ static int intel_vgpu_open_device(struct mdev_device *mdev)
goto undo_group;
}

- ret = kvmgt_guest_init(mdev);
- if (ret)
+ ret = -EEXIST;
+ if (vgpu->attached)
+ goto undo_group;
+
+ ret = -ESRCH;
+ if (!vgpu->kvm || vgpu->kvm->mm != current->mm) {
+ gvt_vgpu_err("KVM is required to use Intel vGPU\n");
+ goto undo_group;
+ }
+
+ ret = -EEXIST;
+ if (__kvmgt_vgpu_exist(vgpu))
goto undo_group;

+ vgpu->attached = true;
+ kvm_get_kvm(vgpu->kvm);
+
+ kvmgt_protect_table_init(vgpu);
+ gvt_cache_init(vgpu);
+
+ vgpu->track_node.track_write = kvmgt_page_track_write;
+ vgpu->track_node.track_flush_slot = kvmgt_page_track_flush_slot;
+ kvm_page_track_register_notifier(vgpu->kvm, &vgpu->track_node);
+
+ debugfs_create_ulong(KVMGT_DEBUGFS_FILENAME, 0444, vgpu->debugfs,
+ &vgpu->nr_cache_entries);
+
intel_gvt_activate_vgpu(vgpu);

atomic_set(&vgpu->released, 0);
- return ret;
+ return 0;

undo_group:
vfio_group_put_external_user(vgpu->vfio_group);
@@ -890,7 +939,12 @@ static void __intel_vgpu_release(struct intel_vgpu *vgpu)
/* dereference module reference taken at open */
module_put(THIS_MODULE);

- kvmgt_guest_exit(vgpu);
+ debugfs_remove(debugfs_lookup(KVMGT_DEBUGFS_FILENAME, vgpu->debugfs));
+
+ kvm_page_track_unregister_notifier(vgpu->kvm, &vgpu->track_node);
+ kvm_put_kvm(vgpu->kvm);
+ kvmgt_protect_table_destroy(vgpu);
+ gvt_cache_destroy(vgpu);

intel_vgpu_release_msi_eventfd_ctx(vgpu);
vfio_group_put_external_user(vgpu->vfio_group);
@@ -1745,69 +1799,6 @@ static void kvmgt_page_track_flush_slot(struct kvm *kvm,
write_unlock(&kvm->mmu_lock);
}

-static bool __kvmgt_vgpu_exist(struct intel_vgpu *vgpu, struct kvm *kvm)
-{
- struct intel_vgpu *itr;
- int id;
- bool ret = false;
-
- mutex_lock(&vgpu->gvt->lock);
- for_each_active_vgpu(vgpu->gvt, itr, id) {
- if (!itr->attached)
- continue;
-
- if (kvm && kvm == itr->kvm) {
- ret = true;
- goto out;
- }
- }
-out:
- mutex_unlock(&vgpu->gvt->lock);
- return ret;
-}
-
-static int kvmgt_guest_init(struct mdev_device *mdev)
-{
- struct intel_vgpu *vgpu = mdev_get_drvdata(mdev);
- struct kvm *kvm = vgpu->kvm;
-
- if (vgpu->attached)
- return -EEXIST;
-
- if (!kvm || kvm->mm != current->mm) {
- gvt_vgpu_err("KVM is required to use Intel vGPU\n");
- return -ESRCH;
- }
-
- if (__kvmgt_vgpu_exist(vgpu, kvm))
- return -EEXIST;
-
- vgpu->attached = true;
- kvm_get_kvm(vgpu->kvm);
-
- kvmgt_protect_table_init(vgpu);
- gvt_cache_init(vgpu);
-
- vgpu->track_node.track_write = kvmgt_page_track_write;
- vgpu->track_node.track_flush_slot = kvmgt_page_track_flush_slot;
- kvm_page_track_register_notifier(kvm, &vgpu->track_node);
-
- debugfs_create_ulong(KVMGT_DEBUGFS_FILENAME, 0444, vgpu->debugfs,
- &vgpu->nr_cache_entries);
- return 0;
-}
-
-static bool kvmgt_guest_exit(struct intel_vgpu *info)
-{
- debugfs_remove(debugfs_lookup(KVMGT_DEBUGFS_FILENAME, info->debugfs));
-
- kvm_page_track_unregister_notifier(info->kvm, &info->track_node);
- kvm_put_kvm(info->kvm);
- kvmgt_protect_table_destroy(info);
- gvt_cache_destroy(info);
- return true;
-}
-
void intel_vgpu_detach_regions(struct intel_vgpu *vgpu)
{
int i;
--
2.30.2