pci_emul_fallback_handler(struct vmctx *ctx, int vcpu, int dir, uint64_t addr,
			  int size, uint64_t *val, void *arg1, long arg2)
{
	/*
	 * Ignore writes; return 0xff's for reads. The mem read code
	 * will take care of truncating to the correct size.
	 */
	if (dir == MEM_F_READ)
		*val = 0xffffffffffffffff;

	return 0;
}
pci_emul_fallback_handler(struct vmctx *ctx, int vcpu, int dir, uint64_t addr,
			  int size, uint64_t *val, void *arg1, long arg2)
{
	 
	if (dir == MEM_F_READ)
		*val = 0xffffffffffffffff;

	return 0;
}