diff options
| author | Yinghai Lu <yhlu.kernel.send@gmail.com> | 2008-03-24 23:24:34 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-04-17 17:41:20 +0200 |
| commit | 9307cacad0dfe3749f00303125c6f7f0523e5616 (patch) | |
| tree | bc28bf08dc18dacbb2654a9a368f4e09c580dfab /arch/x86 | |
| parent | a7c7d0e91daebd7c5e51f9416d612b6a15e7e79a (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')
| -rw-r--r-- | arch/x86/kernel/cpu/common.c | 25 | ||||
| -rw-r--r-- | arch/x86/kernel/setup_64.c | 7 | ||||
| -rw-r--r-- | arch/x86/mm/pat.c | 15 |
3 files changed, 34 insertions, 13 deletions
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c index 0dd87b8d670..d999d7833bc 100644 --- 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) 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; } diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c index 0648a2225b0..72c0f609740 100644 --- a/arch/x86/mm/pat.c +++ b/arch/x86/mm/pat.c @@ -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"); |