Merge branch 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

[pandora-kernel.git] / arch / x86 / kernel / cpu / common.c

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 68e4a6f..92af7b4 100644 (file)
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -140,10 +140,18 @@ EXPORT_PER_CPU_SYMBOL_GPL(gdt_page);
 static int __init x86_xsave_setup(char *s)
 {
        setup_clear_cpu_cap(X86_FEATURE_XSAVE);
+       setup_clear_cpu_cap(X86_FEATURE_XSAVEOPT);
        return 1;
 }
 __setup("noxsave", x86_xsave_setup);
 
+static int __init x86_xsaveopt_setup(char *s)
+{
+       setup_clear_cpu_cap(X86_FEATURE_XSAVEOPT);
+       return 1;
+}
+__setup("noxsaveopt", x86_xsaveopt_setup);
+
 #ifdef CONFIG_X86_32
 static int cachesize_override __cpuinitdata = -1;
 static int disable_x86_serial_nr __cpuinitdata = 1;
@@ -537,7 +545,7 @@ void __cpuinit cpu_detect(struct cpuinfo_x86 *c)
        }
 }
 
-static void __cpuinit get_cpu_cap(struct cpuinfo_x86 *c)
+void __cpuinit get_cpu_cap(struct cpuinfo_x86 *c)
 {
        u32 tfms, xlvl;
        u32 ebx;
@@ -551,6 +559,16 @@ static void __cpuinit get_cpu_cap(struct cpuinfo_x86 *c)
                c->x86_capability[4] = excap;
        }
 
+       /* Additional Intel-defined flags: level 0x00000007 */
+       if (c->cpuid_level >= 0x00000007) {
+               u32 eax, ebx, ecx, edx;
+
+               cpuid_count(0x00000007, 0, &eax, &ebx, &ecx, &edx);
+
+               if (eax > 0)
+                       c->x86_capability[9] = ebx;
+       }
+
        /* AMD-defined flags: level 0x80000001 */
        xlvl = cpuid_eax(0x80000000);
        c->extended_cpuid_level = xlvl;
@@ -576,6 +594,7 @@ static void __cpuinit get_cpu_cap(struct cpuinfo_x86 *c)
        if (c->extended_cpuid_level >= 0x80000007)
                c->x86_power = cpuid_edx(0x80000007);
 
+       init_scattered_cpuid_features(c);
 }
 
 static void __cpuinit identify_cpu_without_cpuid(struct cpuinfo_x86 *c)
@@ -646,7 +665,7 @@ static void __init early_identify_cpu(struct cpuinfo_x86 *c)
                this_cpu->c_early_init(c);
 
 #ifdef CONFIG_SMP
-       c->cpu_index = boot_cpu_id;
+       c->cpu_index = 0;
 #endif
        filter_cpuid_features(c, false);
 }
@@ -685,16 +704,21 @@ void __init early_cpu_init(void)
 }
 
 /*
- * The NOPL instruction is supposed to exist on all CPUs with
- * family >= 6; unfortunately, that's not true in practice because
- * of early VIA chips and (more importantly) broken virtualizers that
- * are not easy to detect.  In the latter case it doesn't even *fail*
- * reliably, so probing for it doesn't even work.  Disable it completely
+ * The NOPL instruction is supposed to exist on all CPUs of family >= 6;
+ * unfortunately, that's not true in practice because of early VIA
+ * chips and (more importantly) broken virtualizers that are not easy
+ * to detect. In the latter case it doesn't even *fail* reliably, so
+ * probing for it doesn't even work. Disable it completely on 32-bit
  * unless we can find a reliable way to detect all the broken cases.
+ * Enable it explicitly on 64-bit for non-constant inputs of cpu_has().
  */
 static void __cpuinit detect_nopl(struct cpuinfo_x86 *c)
 {
+#ifdef CONFIG_X86_32
        clear_cpu_cap(c, X86_FEATURE_NOPL);
+#else
+       set_cpu_cap(c, X86_FEATURE_NOPL);
+#endif
 }
 
 static void __cpuinit generic_identify(struct cpuinfo_x86 *c)
@@ -731,7 +755,6 @@ static void __cpuinit generic_identify(struct cpuinfo_x86 *c)
 
        get_model_name(c); /* Default name */
 
-       init_scattered_cpuid_features(c);
        detect_nopl(c);
 }
 
@@ -1192,6 +1215,7 @@ void __cpuinit cpu_init(void)
        dbg_restore_debug_regs();
 
        fpu_init();
+       xsave_init();
 
        raw_local_save_flags(kernel_eflags);
 
@@ -1252,12 +1276,7 @@ void __cpuinit cpu_init(void)
        clear_used_math();
        mxcsr_feature_mask_init();
 
-       /*
-        * Boot processor to setup the FP and extended state context info.
-        */
-       if (smp_processor_id() == boot_cpu_id)
-               init_thread_xstate();
-
+       fpu_init();
        xsave_init();
 }
 #endif