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x86: pat cpu feature bit setting for known cpus

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Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Yinghai Lu
2008-03-24 23:24:34 -07:00
committed by Ingo Molnar
parent a7c7d0e91d
commit 9307cacad0
3 changed files with 34 additions and 13 deletions
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15
arch/x86/mm/pat.c
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@@ -40,19 +40,8 @@ static int pat_known_cpu(void)
if (!pat_wc_enabled)
return 0;
if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL &&
(boot_cpu_data.x86 == 0xF ||
(boot_cpu_data.x86 == 6 && boot_cpu_data.x86_model >= 15))) {
if (cpu_has_pat) {
return 1;
}
}
if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
boot_cpu_data.x86 >= 0xf && boot_cpu_data.x86 <= 0x11) {
if (cpu_has_pat) {
return 1;
}
}
if (cpu_has_pat)
return 1;
pat_wc_enabled = 0;
printk(KERN_INFO "CPU and/or kernel does not support PAT.\n");