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x86/cpufeature: Add bug flags to /proc/cpuinfo

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Dump the flags which denote we have detected and/or have applied bug
workarounds to the CPU we're executing on, in a similar manner to the
feature flags.

The advantage is that those are not accumulating over time like the CPU
features.

Signed-off-by: Borislav Petkov <bp@suse.de>
Link: http://lkml.kernel.org/r/1403609105-8332-2-git-send-email-bp@alien8.de
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Borislav Petkov
2014-06-24 13:25:03 +02:00
committed by H. Peter Anvin
parent 9b13a93df2
commit 80a208bd39
3 changed files with 53 additions and 16 deletions
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8
arch/x86/kernel/cpu/proc.c
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@@ -97,6 +97,14 @@ static int show_cpuinfo(struct seq_file *m, void *v)
if (cpu_has(c, i) && x86_cap_flags[i] != NULL)
seq_printf(m, " %s", x86_cap_flags[i]);
seq_printf(m, "\nbugs\t\t:");
for (i = 0; i < 32*NBUGINTS; i++) {
unsigned int bug_bit = 32*NCAPINTS + i;
if (cpu_has_bug(c, bug_bit) && x86_bug_flags[i])
seq_printf(m, " %s", x86_bug_flags[i]);
}
seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
c->loops_per_jiffy/(500000/HZ),
(c->loops_per_jiffy/(5000/HZ)) % 100);