x86: pat cpu feature bit setting for known cpus

[safe/jmp/linux-2.6] / arch / x86 / kernel / cpu / common.c

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 0dd87b8..d999d78 100644 (file)
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -309,6 +309,19 @@ static void __cpuinit early_get_cap(struct cpuinfo_x86 *c)
 
        }
 
+       clear_cpu_cap(c, X86_FEATURE_PAT);
+
+       switch (c->x86_vendor) {
+       case X86_VENDOR_AMD:
+               if (c->x86 >= 0xf && c->x86 <= 0x11)
+                       set_cpu_cap(c, X86_FEATURE_PAT);
+               break;
+       case X86_VENDOR_INTEL:
+               if (c->x86 == 0xF || (c->x86 == 6 && c->x86_model >= 15))
+                       set_cpu_cap(c, X86_FEATURE_PAT);
+               break;
+       }
+
 }
 
 /*
@@ -397,6 +410,18 @@ static void __cpuinit generic_identify(struct cpuinfo_x86 *c)
                init_scattered_cpuid_features(c);
        }
 
+       clear_cpu_cap(c, X86_FEATURE_PAT);
+
+       switch (c->x86_vendor) {
+       case X86_VENDOR_AMD:
+               if (c->x86 >= 0xf && c->x86 <= 0x11)
+                       set_cpu_cap(c, X86_FEATURE_PAT);
+               break;
+       case X86_VENDOR_INTEL:
+               if (c->x86 == 0xF || (c->x86 == 6 && c->x86_model >= 15))
+                       set_cpu_cap(c, X86_FEATURE_PAT);
+               break;
+       }
 }
 
 static void __cpuinit squash_the_stupid_serial_number(struct cpuinfo_x86 *c)