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mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-24 05:04:00 +08:00
linux-next/arch/x86/boot/cpu.c
Thomas Gleixner 97873a3daf treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 497
Based on 1 normalized pattern(s):

  this file is part of the linux kernel and is made available under
  the terms of the gnu general public license version 2

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 28 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Enrico Weigelt <info@metux.net>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190604081206.534229504@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-19 17:09:53 +02:00

100 lines
2.0 KiB
C

// SPDX-License-Identifier: GPL-2.0-only
/* -*- linux-c -*- ------------------------------------------------------- *
*
* Copyright (C) 1991, 1992 Linus Torvalds
* Copyright 2007-2008 rPath, Inc. - All Rights Reserved
*
* ----------------------------------------------------------------------- */
/*
* arch/x86/boot/cpu.c
*
* Check for obligatory CPU features and abort if the features are not
* present.
*/
#include "boot.h"
#ifdef CONFIG_X86_FEATURE_NAMES
#include "cpustr.h"
#endif
static char *cpu_name(int level)
{
static char buf[6];
if (level == 64) {
return "x86-64";
} else {
if (level == 15)
level = 6;
sprintf(buf, "i%d86", level);
return buf;
}
}
static void show_cap_strs(u32 *err_flags)
{
int i, j;
#ifdef CONFIG_X86_FEATURE_NAMES
const unsigned char *msg_strs = (const unsigned char *)x86_cap_strs;
for (i = 0; i < NCAPINTS; i++) {
u32 e = err_flags[i];
for (j = 0; j < 32; j++) {
if (msg_strs[0] < i ||
(msg_strs[0] == i && msg_strs[1] < j)) {
/* Skip to the next string */
msg_strs += 2;
while (*msg_strs++)
;
}
if (e & 1) {
if (msg_strs[0] == i &&
msg_strs[1] == j &&
msg_strs[2])
printf("%s ", msg_strs+2);
else
printf("%d:%d ", i, j);
}
e >>= 1;
}
}
#else
for (i = 0; i < NCAPINTS; i++) {
u32 e = err_flags[i];
for (j = 0; j < 32; j++) {
if (e & 1)
printf("%d:%d ", i, j);
e >>= 1;
}
}
#endif
}
int validate_cpu(void)
{
u32 *err_flags;
int cpu_level, req_level;
check_cpu(&cpu_level, &req_level, &err_flags);
if (cpu_level < req_level) {
printf("This kernel requires an %s CPU, ",
cpu_name(req_level));
printf("but only detected an %s CPU.\n",
cpu_name(cpu_level));
return -1;
}
if (err_flags) {
puts("This kernel requires the following features "
"not present on the CPU:\n");
show_cap_strs(err_flags);
putchar('\n');
return -1;
} else if (check_knl_erratum()) {
return -1;
} else {
return 0;
}
}