commit 9307cacad0dfe3749f00303125c6f7f0523e5616
author Yinghai Lu <yhlu.kernel.send@gmail.com> Mon Mar 24 23:24:34 2008 -0700
committer Ingo Molnar <mingo@elte.hu> Thu Apr 17 17:41:20 2008 +0200
tree bc28bf08dc18dacbb2654a9a368f4e09c580dfab
parent a7c7d0e91daebd7c5e51f9416d612b6a15e7e79a

x86: pat cpu feature bit setting for known cpus

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -309,6 +309,19 @@
 
 	}
 
+	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 @@
 		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)