f0be6c6a69
Instead of obscure numbers, print the list of missing CPU features in cleartext. To conserve space, use a host program (mkcpustr.c) to produce a compact list of mandatory features only. Signed-off-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
86 lines
1.7 KiB
C
86 lines
1.7 KiB
C
/* -*- linux-c -*- ------------------------------------------------------- *
|
|
*
|
|
* Copyright (C) 1991, 1992 Linus Torvalds
|
|
* Copyright 2007-2008 rPath, Inc. - All Rights Reserved
|
|
*
|
|
* This file is part of the Linux kernel, and is made available under
|
|
* the terms of the GNU General Public License version 2.
|
|
*
|
|
* ----------------------------------------------------------------------- */
|
|
|
|
/*
|
|
* arch/x86/boot/cpu.c
|
|
*
|
|
* Check for obligatory CPU features and abort if the features are not
|
|
* present.
|
|
*/
|
|
|
|
#include "boot.h"
|
|
#include "bitops.h"
|
|
#include <asm/cpufeature.h>
|
|
|
|
#include "cpustr.h"
|
|
|
|
static char *cpu_name(int level)
|
|
{
|
|
static char buf[6];
|
|
|
|
if (level == 64) {
|
|
return "x86-64";
|
|
} else {
|
|
sprintf(buf, "i%d86", level);
|
|
return buf;
|
|
}
|
|
}
|
|
|
|
int validate_cpu(void)
|
|
{
|
|
u32 *err_flags;
|
|
int cpu_level, req_level;
|
|
const unsigned char *msg_strs;
|
|
|
|
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) {
|
|
int i, j;
|
|
puts("This kernel requires the following features "
|
|
"not present on the CPU:\n");
|
|
|
|
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++) {
|
|
int n = (i << 5)+j;
|
|
if (*msg_strs < n) {
|
|
/* Skip to the next string */
|
|
do {
|
|
msg_strs++;
|
|
} while (*msg_strs);
|
|
msg_strs++;
|
|
}
|
|
if (e & 1) {
|
|
if (*msg_strs == n && msg_strs[1])
|
|
printf("%s ", msg_strs+1);
|
|
else
|
|
printf("%d:%d ", i, j);
|
|
}
|
|
e >>= 1;
|
|
}
|
|
}
|
|
putchar('\n');
|
|
return -1;
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|