int xenctl_cpumap_to_cpumask(
cpumask_var_t *cpumask, const struct xenctl_cpumap *xenctl_cpumap)
{
unsigned int guest_bytes, copy_bytes;
int err = 0;
uint8_t *bytemap = xzalloc_array(uint8_t, (nr_cpu_ids + 7) / 8);
if ( !bytemap )
return -ENOMEM;
guest_bytes = (xenctl_cpumap->nr_cpus + 7) / 8;
copy_bytes = min_t(unsigned int, guest_bytes, (nr_cpu_ids + 7) / 8);
if ( copy_bytes != 0 )
{
if ( copy_from_guest(bytemap, xenctl_cpumap->bitmap, copy_bytes) )
err = -EFAULT;
if ( (xenctl_cpumap->nr_cpus & 7) && (guest_bytes == copy_bytes) )
bytemap[guest_bytes-1] &= ~(0xff << (xenctl_cpumap->nr_cpus & 7));
}
if ( err )
/* nothing */;
else if ( alloc_cpumask_var(cpumask) )
bitmap_byte_to_long(cpumask_bits(*cpumask), bytemap, nr_cpu_ids);
else
err = -ENOMEM;
xfree(bytemap);
return err;
}
static int xenctl_bitmap_to_bitmap(unsigned long *bitmap,
const struct xenctl_bitmap *xenctl_bitmap,
unsigned int nbits)
{
unsigned int guest_bytes, copy_bytes;
int err = 0;
uint8_t *bytemap = xzalloc_array(uint8_t, (nbits + 7) / 8);
if ( !bytemap )
return -ENOMEM;
guest_bytes = (xenctl_bitmap->nr_bits + 7) / 8;
copy_bytes = min_t(unsigned int, guest_bytes, (nbits + 7) / 8);
if ( copy_bytes != 0 )
{
if ( copy_from_guest(bytemap, xenctl_bitmap->bitmap, copy_bytes) )
err = -EFAULT;
if ( (xenctl_bitmap->nr_bits & 7) && (guest_bytes == copy_bytes) )
bytemap[guest_bytes-1] &= ~(0xff << (xenctl_bitmap->nr_bits & 7));
}
if ( !err )
bitmap_byte_to_long(bitmap, bytemap, nbits);
xfree(bytemap);
return err;
}
struct domain *alloc_domain_struct(void)
{
struct domain *d;
BUILD_BUG_ON(sizeof(*d) > PAGE_SIZE);
d = alloc_xenheap_pages(0, 0);
if ( d == NULL )
return NULL;
clear_page(d);
d->arch.grant_table_gpfn = xzalloc_array(xen_pfn_t, max_grant_frames);
return d;
}
