mirror of
https://github.com/torvalds/linux.git
synced 2024-11-28 07:01:32 +00:00
97873a3daf
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>
100 lines
2.0 KiB
C
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;
|
|
}
|
|
}
|