H_KERN_VIRT_START
if (ea < H_KERN_VIRT_START)
#define H_VMALLOC_START H_KERN_VIRT_START
#define NON_LINEAR_REGION_ID(ea) ((((unsigned long)ea - H_KERN_VIRT_START) >> REGION_SHIFT) + 2)
__kernel_virt_start = H_KERN_VIRT_START;