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7583e8fbdc
While discussing to change the visibility of X86_FEATURE_NAMES (see Link) in order to remove CONFIG_EMBEDDED, Boris suggested to simply make the X86_FEATURE_NAMES functionality unconditional. As the need for really tiny kernel images has gone away and kernel images with !X86_FEATURE_NAMES are hardly tested, remove this config and the whole ifdeffery in the source code. Suggested-by: Borislav Petkov <bp@alien8.de> Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Link: https://lore.kernel.org/all/20230509084007.24373-1-lukas.bulwahn@gmail.com/ Link: https://lore.kernel.org/r/20230510065713.10996-3-lukas.bulwahn@gmail.com
86 lines
1.7 KiB
C
86 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/* -*- linux-c -*- ------------------------------------------------------- *
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*
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* Copyright (C) 1991, 1992 Linus Torvalds
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* Copyright 2007-2008 rPath, Inc. - All Rights Reserved
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*
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* ----------------------------------------------------------------------- */
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/*
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* arch/x86/boot/cpu.c
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*
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* Check for obligatory CPU features and abort if the features are not
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* present.
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*/
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#include "boot.h"
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#include "cpustr.h"
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static char *cpu_name(int level)
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{
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static char buf[6];
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if (level == 64) {
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return "x86-64";
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} else {
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if (level == 15)
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level = 6;
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sprintf(buf, "i%d86", level);
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return buf;
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}
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}
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static void show_cap_strs(u32 *err_flags)
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{
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int i, j;
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const unsigned char *msg_strs = (const unsigned char *)x86_cap_strs;
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for (i = 0; i < NCAPINTS; i++) {
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u32 e = err_flags[i];
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for (j = 0; j < 32; j++) {
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if (msg_strs[0] < i ||
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(msg_strs[0] == i && msg_strs[1] < j)) {
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/* Skip to the next string */
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msg_strs += 2;
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while (*msg_strs++)
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;
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}
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if (e & 1) {
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if (msg_strs[0] == i &&
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msg_strs[1] == j &&
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msg_strs[2])
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printf("%s ", msg_strs+2);
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else
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printf("%d:%d ", i, j);
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}
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e >>= 1;
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}
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}
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}
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int validate_cpu(void)
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{
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u32 *err_flags;
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int cpu_level, req_level;
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check_cpu(&cpu_level, &req_level, &err_flags);
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if (cpu_level < req_level) {
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printf("This kernel requires an %s CPU, ",
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cpu_name(req_level));
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printf("but only detected an %s CPU.\n",
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cpu_name(cpu_level));
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return -1;
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}
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if (err_flags) {
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puts("This kernel requires the following features "
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"not present on the CPU:\n");
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show_cap_strs(err_flags);
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putchar('\n');
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return -1;
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} else if (check_knl_erratum()) {
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return -1;
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} else {
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return 0;
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}
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}
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