x86: cap iomem_resource to addressable physical memory

[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 c1caefc..5b9cb88 100644 (file)
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -13,6 +13,7 @@
 #include <linux/io.h>
 
 #include <asm/stackprotector.h>
+#include <asm/perf_counter.h>
 #include <asm/mmu_context.h>
 #include <asm/hypervisor.h>
 #include <asm/processor.h>
@@ -114,6 +115,13 @@ DEFINE_PER_CPU_PAGE_ALIGNED(struct gdt_page, gdt_page) = { .gdt = {
 } };
 EXPORT_PER_CPU_SYMBOL_GPL(gdt_page);
 
+static int __init x86_xsave_setup(char *s)
+{
+       setup_clear_cpu_cap(X86_FEATURE_XSAVE);
+       return 1;
+}
+__setup("noxsave", x86_xsave_setup);
+
 #ifdef CONFIG_X86_32
 static int cachesize_override __cpuinitdata = -1;
 static int disable_x86_serial_nr __cpuinitdata = 1;
@@ -292,7 +300,8 @@ static const char *__cpuinit table_lookup_model(struct cpuinfo_x86 *c)
        return NULL;            /* Not found */
 }
 
-__u32 cleared_cpu_caps[NCAPINTS] __cpuinitdata;
+__u32 cpu_caps_cleared[NCAPINTS] __cpuinitdata;
+__u32 cpu_caps_set[NCAPINTS] __cpuinitdata;
 
 void load_percpu_segment(int cpu)
 {
@@ -761,6 +770,12 @@ static void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
        if (this_cpu->c_identify)
                this_cpu->c_identify(c);
 
+       /* Clear/Set all flags overriden by options, after probe */
+       for (i = 0; i < NCAPINTS; i++) {
+               c->x86_capability[i] &= ~cpu_caps_cleared[i];
+               c->x86_capability[i] |= cpu_caps_set[i];
+       }
+
 #ifdef CONFIG_X86_64
        c->apicid = apic->phys_pkg_id(c->initial_apicid, 0);
 #endif
@@ -806,6 +821,16 @@ static void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
 #endif
 
        init_hypervisor(c);
+
+       /*
+        * Clear/Set all flags overriden by options, need do it
+        * before following smp all cpus cap AND.
+        */
+       for (i = 0; i < NCAPINTS; i++) {
+               c->x86_capability[i] &= ~cpu_caps_cleared[i];
+               c->x86_capability[i] |= cpu_caps_set[i];
+       }
+
        /*
         * On SMP, boot_cpu_data holds the common feature set between
         * all CPUs; so make sure that we indicate which features are
@@ -818,10 +843,6 @@ static void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
                        boot_cpu_data.x86_capability[i] &= c->x86_capability[i];
        }
 
-       /* Clear all flags overriden by options */
-       for (i = 0; i < NCAPINTS; i++)
-               c->x86_capability[i] &= ~cleared_cpu_caps[i];
-
 #ifdef CONFIG_X86_MCE
        /* Init Machine Check Exception if available. */
        mcheck_init(c);
@@ -832,6 +853,9 @@ static void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
 #if defined(CONFIG_NUMA) && defined(CONFIG_X86_64)
        numa_add_cpu(smp_processor_id());
 #endif
+
+       /* Cap the iomem address space to what is addressable on all CPUs */
+       iomem_resource.end &= (1ULL << c->x86_phys_bits) - 1;
 }
 
 #ifdef CONFIG_X86_64
@@ -854,6 +878,7 @@ void __init identify_boot_cpu(void)
 #else
        vgetcpu_set_mode();
 #endif
+       init_hw_perf_counters();
 }
 
 void __cpuinit identify_secondary_cpu(struct cpuinfo_x86 *c)