/*
* This routine finds the first virtqueue described in the configuration of
* this device and sets it up.
*/
static struct virtqueue *kvm_find_vq(struct virtio_device *vdev,
unsigned index,
void (*callback)(struct virtqueue *vq),
const char *name)
{
struct kvm_device *kdev = to_kvmdev(vdev);
struct kvm_vqconfig *config;
struct virtqueue *vq;
int err;
if (index >= kdev->desc->num_vq)
return ERR_PTR(-ENOENT);
config = kvm_vq_config(kdev->desc)+index;
err = vmem_add_mapping(config->address,
vring_size(config->num,
KVM_S390_VIRTIO_RING_ALIGN));
if (err)
goto out;
vq = vring_new_virtqueue(config->num, KVM_S390_VIRTIO_RING_ALIGN,
vdev, (void *) config->address,
kvm_notify, callback, name);
if (!vq) {
err = -ENOMEM;
goto unmap;
}
/*
* register a callback token
* The host will sent this via the external interrupt parameter
*/
config->token = (u64) vq;
vq->priv = config;
return vq;
unmap:
vmem_remove_mapping(config->address,
vring_size(config->num,
KVM_S390_VIRTIO_RING_ALIGN));
out:
return ERR_PTR(err);
}
int arch_add_memory(int nid, u64 start, u64 size, bool for_device)
{
unsigned long zone_start_pfn, zone_end_pfn, nr_pages;
unsigned long start_pfn = PFN_DOWN(start);
unsigned long size_pages = PFN_DOWN(size);
struct zone *zone;
int rc;
rc = vmem_add_mapping(start, size);
if (rc)
return rc;
for_each_zone(zone) {
if (zone_idx(zone) != ZONE_MOVABLE) {
/* Add range within existing zone limits */
zone_start_pfn = zone->zone_start_pfn;
zone_end_pfn = zone->zone_start_pfn +
zone->spanned_pages;
} else {
/* Add remaining range to ZONE_MOVABLE */
zone_start_pfn = start_pfn;
zone_end_pfn = start_pfn + size_pages;
}
if (start_pfn < zone_start_pfn || start_pfn >= zone_end_pfn)
continue;
nr_pages = (start_pfn + size_pages > zone_end_pfn) ?
zone_end_pfn - start_pfn : size_pages;
rc = __add_pages(nid, zone, start_pfn, nr_pages);
if (rc)
break;
start_pfn += nr_pages;
size_pages -= nr_pages;
if (!size_pages)
break;
}
if (rc)
vmem_remove_mapping(start, size);
return rc;
}
int arch_add_memory(int nid, u64 start, u64 size, bool for_device)
{
unsigned long normal_end_pfn = PFN_DOWN(memblock_end_of_DRAM());
unsigned long dma_end_pfn = PFN_DOWN(MAX_DMA_ADDRESS);
unsigned long start_pfn = PFN_DOWN(start);
unsigned long size_pages = PFN_DOWN(size);
unsigned long nr_pages;
int rc, zone_enum;
rc = vmem_add_mapping(start, size);
if (rc)
return rc;
while (size_pages > 0) {
if (start_pfn < dma_end_pfn) {
nr_pages = (start_pfn + size_pages > dma_end_pfn) ?
dma_end_pfn - start_pfn : size_pages;
zone_enum = ZONE_DMA;
} else if (start_pfn < normal_end_pfn) {
nr_pages = (start_pfn + size_pages > normal_end_pfn) ?
normal_end_pfn - start_pfn : size_pages;
zone_enum = ZONE_NORMAL;
} else {
nr_pages = size_pages;
zone_enum = ZONE_MOVABLE;
}
rc = __add_pages(nid, NODE_DATA(nid)->node_zones + zone_enum,
start_pfn, size_pages);
if (rc)
break;
start_pfn += nr_pages;
size_pages -= nr_pages;
}
if (rc)
vmem_remove_mapping(start, size);
return rc;
}
