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 union tod_clock clk;
12
13 /* CPU number is stored in the programmable field of the TOD clock */
14 store_tod_clock_ext(&clk);
15 if (cpu)
16 *cpu = clk.pf;
17 /* NUMA node is always zero */
18 if (node)
19 *node = 0;
20 return 0;
21 }
22
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