Merge branch 'topic/oss' into for-linus

[pandora-kernel.git] / arch / x86 / xen / enlighten.c

diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 0a1700a..eb33aaa 100644 (file)
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -215,6 +215,7 @@ static __init void xen_init_cpuid_mask(void)
                          (1 << X86_FEATURE_ACPI));  /* disable ACPI */
 
        ax = 1;
+       cx = 0;
        xen_cpuid(&ax, &bx, &cx, &dx);
 
        /* cpuid claims we support xsave; try enabling it to see what happens */
@@ -974,10 +975,6 @@ asmlinkage void __init xen_start_kernel(void)
 
        xen_domain_type = XEN_PV_DOMAIN;
 
-       BUG_ON(memcmp(xen_start_info->magic, "xen-3", 5) != 0);
-
-       xen_setup_features();
-
        /* Install Xen paravirt ops */
        pv_info = xen_info;
        pv_init_ops = xen_init_ops;
@@ -986,8 +983,15 @@ asmlinkage void __init xen_start_kernel(void)
        pv_apic_ops = xen_apic_ops;
        pv_mmu_ops = xen_mmu_ops;
 
-       xen_init_irq_ops();
+#ifdef CONFIG_X86_64
+       /*
+        * Setup percpu state.  We only need to do this for 64-bit
+        * because 32-bit already has %fs set properly.
+        */
+       load_percpu_segment(0);
+#endif
 
+       xen_init_irq_ops();
        xen_init_cpuid_mask();
 
 #ifdef CONFIG_X86_LOCAL_APIC
@@ -997,6 +1001,8 @@ asmlinkage void __init xen_start_kernel(void)
        set_xen_basic_apic_ops();
 #endif
 
+       xen_setup_features();
+
        if (xen_feature(XENFEAT_mmu_pt_update_preserve_ad)) {
                pv_mmu_ops.ptep_modify_prot_start = xen_ptep_modify_prot_start;
                pv_mmu_ops.ptep_modify_prot_commit = xen_ptep_modify_prot_commit;
@@ -1004,13 +1010,6 @@ asmlinkage void __init xen_start_kernel(void)
 
        machine_ops = xen_machine_ops;
 
-#ifdef CONFIG_X86_64
-       /*
-        * Setup percpu state.  We only need to do this for 64-bit
-        * because 32-bit already has %fs set properly.
-        */
-       load_percpu_segment(0);
-#endif
        /*
         * The only reliable way to retain the initial address of the
         * percpu gdt_page is to remember it here, so we can go and
@@ -1061,6 +1060,7 @@ asmlinkage void __init xen_start_kernel(void)
        /* set up basic CPUID stuff */
        cpu_detect(&new_cpu_data);
        new_cpu_data.hard_math = 1;
+       new_cpu_data.wp_works_ok = 1;
        new_cpu_data.x86_capability[0] = cpuid_edx(1);
 #endif