1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright IBM Corp. 2020 */ 3 4 #include <linux/compiler.h> 5 #include <linux/getcpu.h> 6 #include <asm/timex.h> 7 #include "vdso.h" 8 9 int __s390_vdso_getcpu(unsigned *cpu, unsigned *node, struct getcpu_cache *unused) 10 { 11 __u16 todval[8]; 12 13 /* CPU number is stored in the programmable field of the TOD clock */ 14 get_tod_clock_ext((char *)todval); 15 if (cpu) 16 *cpu = todval[7]; 17 /* NUMA node is always zero */ 18 if (node) 19 *node = 0; 20 return 0; 21 } 22