linux/arch/x86/mm/physaddr.h
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   1/* SPDX-License-Identifier: GPL-2.0 */
   2#include <asm/processor.h>
   3
   4static inline int phys_addr_valid(resource_size_t addr)
   5{
   6#ifdef CONFIG_PHYS_ADDR_T_64BIT
   7        return !(addr >> boot_cpu_data.x86_phys_bits);
   8#else
   9        return 1;
  10#endif
  11}
  12