[PATCH] i386/x86-64: Emulate CPUID4 on AMD

Intel systems report the cache level data from CPUID 4 in sysfs.
Add a CPUID 4 emulation for AMD CPUs to report the same
information for them. This allows programs to read this
information in a uniform way.

The AMD way to report this is less flexible so some assumptions
are hardcoded (e.g. no L3)

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/arch/x86_64/kernel/setup.c b/arch/x86_64/kernel/setup.c
index 1cb3e21c571a..4b7e02216970 100644
--- a/arch/x86_64/kernel/setup.c
+++ b/arch/x86_64/kernel/setup.c
@@ -976,6 +976,9 @@ static int __init init_amd(struct cpuinfo_x86 *c)
         if (c->extended_cpuid_level >= 0x80000008)
                 amd_detect_cmp(c);
 
+        /* Fix cpuid4 emulation for more */
+        num_cache_leaves = 3;
+
         return r;
 }