x86, cacheinfo: Unify AMD L3 cache index disable checking

All F10h CPUs starting with model 8 resp. 9, stepping 1, support L3
cache index disable. Concentrate the family, model, stepping checking at
one place and enable the feature implicitly on upcoming Fam10h models.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
LKML-Reference: <1271945222-5283-2-git-send-email-bp@amd64.org>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

1 files changed, 10 insertions, 7 deletions

diff --git a/arch/x86/kernel/cpu/intel_cacheinfo.c b/arch/x86/kernel/cpu/intel_cacheinfo.c
index b3eeb66c0a51..acfb08383908 100644
--- a/arch/x86/kernel/cpu/intel_cacheinfo.c
+++ b/arch/x86/kernel/cpu/intel_cacheinfo.c
@@ -328,18 +328,22 @@ static unsigned int __cpuinit amd_calc_l3_indices(void)
 static void __cpuinit
 amd_check_l3_disable(int index, struct _cpuid4_info_regs *this_leaf)
 {
-        if (index < 3)
+        if (boot_cpu_data.x86 != 0x10)
                 return;
 
-        if (boot_cpu_data.x86 == 0x11)
+        if (index < 3)
                 return;
 
         /* see errata #382 and #388 */
-        if ((boot_cpu_data.x86 == 0x10) &&
-            ((boot_cpu_data.x86_model < 0x8) ||
-             (boot_cpu_data.x86_mask  < 0x1)))
+        if (boot_cpu_data.x86_model < 0x8)
                 return;
 
+        if ((boot_cpu_data.x86_model == 0x8 ||
+             boot_cpu_data.x86_model == 0x9)
+                &&
+             boot_cpu_data.x86_mask < 0x1)
+                        return;
+
         this_leaf->can_disable = true;
         this_leaf->l3_indices  = amd_calc_l3_indices();
 }
@@ -443,8 +447,7 @@ __cpuinit cpuid4_cache_lookup_regs(int index,
 
         if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD) {
                 amd_cpuid4(index, &eax, &ebx, &ecx);
-                if (boot_cpu_data.x86 >= 0x10)
-                        amd_check_l3_disable(index, this_leaf);
+                amd_check_l3_disable(index, this_leaf);
         } else {
                 cpuid_count(4, index, &eax.full, &ebx.full, &ecx.full, &edx);
         }