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authorYinghai Lu <yhlu.kernel.send@gmail.com>2008-03-24 23:24:34 -0700
committerIngo Molnar <mingo@elte.hu>2008-04-17 17:41:20 +0200
commit9307cacad0dfe3749f00303125c6f7f0523e5616 (patch)
treebc28bf08dc18dacbb2654a9a368f4e09c580dfab /arch/x86/kernel/setup_64.c
parenta7c7d0e91daebd7c5e51f9416d612b6a15e7e79a (diff)
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>
Diffstat (limited to 'arch/x86/kernel/setup_64.c')
-rw-r--r--arch/x86/kernel/setup_64.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/kernel/setup_64.c b/arch/x86/kernel/setup_64.c
index 20034493b5a..c6fe1e4bc7c 100644
--- a/arch/x86/kernel/setup_64.c
+++ b/arch/x86/kernel/setup_64.c
@@ -962,12 +962,19 @@ static void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c)
if (c->extended_cpuid_level >= 0x80000007)
c->x86_power = cpuid_edx(0x80000007);
+
+ clear_cpu_cap(c, X86_FEATURE_PAT);
+
switch (c->x86_vendor) {
case X86_VENDOR_AMD:
early_init_amd(c);
+ if (c->x86 >= 0xf && c->x86 <= 0x11)
+ set_cpu_cap(c, X86_FEATURE_PAT);
break;
case X86_VENDOR_INTEL:
early_init_intel(c);
+ if (c->x86 == 0xF || (c->x86 == 6 && c->x86_model >= 15))
+ set_cpu_cap(c, X86_FEATURE_PAT);
break;
}