x86, cpu: Expand cpufeature facility to include cpu bugs

We add another 32-bit vector at the end of the ->x86_capability
bitvector which collects bugs present in CPUs. After all, a CPU bug is a
kind of a capability, albeit a strange one.

Signed-off-by: Borislav Petkov <bp@suse.de>
Link: http://lkml.kernel.org/r/1363788448-31325-2-git-send-email-bp@alien8.de
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index d814772c5bed..22018f70a671 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -920,6 +920,10 @@ static void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
                 /* AND the already accumulated flags with these */
                 for (i = 0; i < NCAPINTS; i++)
                         boot_cpu_data.x86_capability[i] &= c->x86_capability[i];
+
+                /* OR, i.e. replicate the bug flags */
+                for (i = NCAPINTS; i < NCAPINTS + NBUGINTS; i++)
+                        c->x86_capability[i] |= boot_cpu_data.x86_capability[i];
         }
 
         /* Init Machine Check Exception if available. */