INTEL_GVT_OPREGION_PAGES
u32 gfn[INTEL_GVT_OPREGION_PAGES];
for (i = 0; i < INTEL_GVT_OPREGION_PAGES; i++)
#define INTEL_GVT_OPREGION_SIZE (INTEL_GVT_OPREGION_PAGES * PAGE_SIZE)