cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

getcpu.c (467B)

      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
      9int __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}