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KVM: arm64: vgic-its: vgic_its_alloc_ite/device 

Add two new helpers to allocate an its ite and an its device.
This will avoid duplication on restore path.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Christoffer Dall <cdall@linaro.org>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Eric Auger 2016-12-25 18:57:54 +01:00 committed by Christoffer Dall
parent 3b65808f4b
commit 528297f560
1 changed files with 47 additions and 21 deletions
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68
virt/kvm/arm/vgic/vgic-its.c
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@ -802,6 +802,25 @@ static void vgic_its_free_collection(struct vgic_its *its, u32 coll_id)
kfree(collection);
}
/* Must be called with its_lock mutex held */
static struct its_ite *vgic_its_alloc_ite(struct its_device *device,
struct its_collection *collection,
u32 lpi_id, u32 event_id)
{
struct its_ite *ite;
ite = kzalloc(sizeof(*ite), GFP_KERNEL);
if (!ite)
return ERR_PTR(-ENOMEM);
ite->event_id = event_id;
ite->collection = collection;
ite->lpi = lpi_id;
list_add_tail(&ite->ite_list, &device->itt_head);
return ite;
}
/*
* The MAPTI and MAPI commands map LPIs to ITTEs.
* Must be called with its_lock mutex held.
@ -816,8 +835,8 @@ static int vgic_its_cmd_handle_mapi(struct kvm *kvm, struct vgic_its *its,
struct kvm_vcpu *vcpu = NULL;
struct its_device *device;
struct its_collection *collection, *new_coll = NULL;
int lpi_nr;
struct vgic_irq *irq;
int lpi_nr;
device = find_its_device(its, device_id);
if (!device)
@ -846,19 +865,13 @@ static int vgic_its_cmd_handle_mapi(struct kvm *kvm, struct vgic_its *its,
new_coll = collection;
}
ite = kzalloc(sizeof(struct its_ite), GFP_KERNEL);
if (!ite) {
ite = vgic_its_alloc_ite(device, collection, lpi_nr, event_id);
if (IS_ERR(ite)) {
if (new_coll)
vgic_its_free_collection(its, coll_id);
return -ENOMEM;
return PTR_ERR(ite);
}
ite->event_id = event_id;
list_add_tail(&ite->ite_list, &device->itt_head);
ite->collection = collection;
ite->lpi = lpi_nr;
if (its_is_collection_mapped(collection))
vcpu = kvm_get_vcpu(kvm, collection->target_addr);
@ -891,6 +904,26 @@ static void vgic_its_unmap_device(struct kvm *kvm, struct its_device *device)
kfree(device);
}
/* Must be called with its_lock mutex held */
static struct its_device *vgic_its_alloc_device(struct vgic_its *its,
u32 device_id, gpa_t itt_addr,
u8 num_eventid_bits)
{
struct its_device *device;
device = kzalloc(sizeof(*device), GFP_KERNEL);
if (!device)
return ERR_PTR(-ENOMEM);
device->device_id = device_id;
device->itt_addr = itt_addr;
device->num_eventid_bits = num_eventid_bits;
INIT_LIST_HEAD(&device->itt_head);
list_add_tail(&device->dev_list, &its->device_list);
return device;
}
/*
* MAPD maps or unmaps a device ID to Interrupt Translation Tables (ITTs).
* Must be called with the its_lock mutex held.
@ -927,17 +960,10 @@ static int vgic_its_cmd_handle_mapd(struct kvm *kvm, struct vgic_its *its,
if (!valid)
return 0;
device = kzalloc(sizeof(struct its_device), GFP_KERNEL);
if (!device)
return -ENOMEM;
device->device_id = device_id;
device->num_eventid_bits = num_eventid_bits;
device->itt_addr = itt_addr;
INIT_LIST_HEAD(&device->itt_head);
list_add_tail(&device->dev_list, &its->device_list);
device = vgic_its_alloc_device(its, device_id, itt_addr,
num_eventid_bits);
if (IS_ERR(device))
return PTR_ERR(device);
return 0;
}