HVPFN_UP
for (j = 0; j < HVPFN_UP(offset + len); j++)
pages += HVPFN_UP(offset + size);
unsigned int hvpg_count = HVPFN_UP(offset_in_hvpg + length);
hvpfns_to_add = HVPFN_UP(sg_dma_address(sg) +