diff options
| author | Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> | 2013-02-21 17:07:14 +0100 |
|---|---|---|
| committer | Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> | 2013-02-21 17:07:14 +0100 |
| commit | e29371d762df5bb35d2bc434ea266a046e5a0a75 (patch) | |
| tree | dac4a8db52d92453415f35606130a49e9f32e4ef /arch/x86/kernel/cpu/amd.c | |
| parent | 17b14ca25e9cd6c5cd7605941f6120e405a84f8b (diff) | |
| parent | 894e2ac82bd0029adce7ad6c8d25501fdd82c994 (diff) | |
Merge branch 'master' of git://1984.lsi.us.es/nf
Diffstat (limited to 'arch/x86/kernel/cpu/amd.c')
| -rw-r--r-- | arch/x86/kernel/cpu/amd.c | 26 |
1 files changed, 16 insertions, 10 deletions
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c index f7e98a2c0d1..15239fffd6f 100644 --- a/arch/x86/kernel/cpu/amd.c +++ b/arch/x86/kernel/cpu/amd.c @@ -304,7 +304,7 @@ static void __cpuinit amd_get_topology(struct cpuinfo_x86 *c) int cpu = smp_processor_id(); /* get information required for multi-node processors */ - if (cpu_has(c, X86_FEATURE_TOPOEXT)) { + if (cpu_has_topoext) { u32 eax, ebx, ecx, edx; cpuid(0x8000001e, &eax, &ebx, &ecx, &edx); @@ -631,6 +631,20 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c) } } + /* + * The way access filter has a performance penalty on some workloads. + * Disable it on the affected CPUs. + */ + if ((c->x86 == 0x15) && + (c->x86_model >= 0x02) && (c->x86_model < 0x20)) { + u64 val; + + if (!rdmsrl_safe(0xc0011021, &val) && !(val & 0x1E)) { + val |= 0x1E; + wrmsrl_safe(0xc0011021, val); + } + } + cpu_detect_cache_sizes(c); /* Multi core CPU? */ @@ -643,12 +657,7 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c) detect_ht(c); #endif - if (c->extended_cpuid_level >= 0x80000006) { - if (cpuid_edx(0x80000006) & 0xf000) - num_cache_leaves = 4; - else - num_cache_leaves = 3; - } + init_amd_cacheinfo(c); if (c->x86 >= 0xf) set_cpu_cap(c, X86_FEATURE_K8); @@ -739,9 +748,6 @@ static unsigned int __cpuinit amd_size_cache(struct cpuinfo_x86 *c, static void __cpuinit cpu_set_tlb_flushall_shift(struct cpuinfo_x86 *c) { - if (!cpu_has_invlpg) - return; - tlb_flushall_shift = 5; if (c->x86 <= 0x11) |