util/cpuinfo-loongarch.c

   1 /*
   2  * SPDX-License-Identifier: GPL-2.0-or-later
   3  * Host specific cpu identification for LoongArch.
   4  */
   5
   6 #include "qemu/osdep.h"
   7 #include "host/cpuinfo.h"
   8
   9 #ifdef CONFIG_GETAUXVAL
  10 # include <sys/auxv.h>
  11 #else
  12 # include "elf.h"
  13 #endif
  14 #include <asm/hwcap.h>
  15
  16 unsigned cpuinfo;
  17
  18 /* Called both as constructor and (possibly) via other constructors. */
  19 unsigned __attribute__((constructor)) cpuinfo_init(void)
  20 {
  21     unsigned info = cpuinfo;
  22     unsigned long hwcap;
  23
  24     if (info) {
  25         return info;
  26     }
  27
  28     hwcap = qemu_getauxval(AT_HWCAP);
  29
  30     info = CPUINFO_ALWAYS;
  31     info |= (hwcap & HWCAP_LOONGARCH_LSX ? CPUINFO_LSX : 0);
  32     info |= (hwcap & HWCAP_LOONGARCH_LASX ? CPUINFO_LASX : 0);
  33
  34     cpuinfo = info;
  35     return info;
  36 }