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authorH. Peter Anvin <hpa@zytor.com>2008-02-04 16:48:00 +0100
committerIngo Molnar <mingo@elte.hu>2008-02-04 16:48:00 +0100
commitf0be6c6a697c2fe8e2efbe98cd157bdbcff969ae (patch)
treeefaa839c9e9bc627b01c459f299031869defcd7f /arch/x86/boot/cpu.c
parentfa1408e4df53ec1e61f59c030b3488a1ef0c635d (diff)
x86 setup: print missing CPU features in cleartext
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>
Diffstat (limited to 'arch/x86/boot/cpu.c')
-rw-r--r--arch/x86/boot/cpu.c26
1 files changed, 21 insertions, 5 deletions
diff --git a/arch/x86/boot/cpu.c b/arch/x86/boot/cpu.c
index 2a5c32da5852..00e19edd852c 100644
--- a/arch/x86/boot/cpu.c
+++ b/arch/x86/boot/cpu.c
@@ -1,7 +1,7 @@
/* -*- linux-c -*- ------------------------------------------------------- *
*
* Copyright (C) 1991, 1992 Linus Torvalds
- * Copyright 2007 rPath, Inc. - All Rights Reserved
+ * 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.
@@ -9,7 +9,7 @@
* ----------------------------------------------------------------------- */
/*
- * arch/i386/boot/cpu.c
+ * arch/x86/boot/cpu.c
*
* Check for obligatory CPU features and abort if the features are not
* present.
@@ -19,6 +19,8 @@
#include "bitops.h"
#include <asm/cpufeature.h>
+#include "cpustr.h"
+
static char *cpu_name(int level)
{
static char buf[6];
@@ -35,6 +37,7 @@ 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);
@@ -51,13 +54,26 @@ int validate_cpu(void)
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++) {
- if (e & 1)
- printf("%d:%d ", i, 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;
}
}