Merge tag 'v4.0-rc2' into x86/asm, to refresh the tree

Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 38 insertions, 5 deletions

diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index 090499a363cb..52417e771af9 100644
--- a/arch/x86/mm/init.c
+++ b/arch/x86/mm/init.c
@@ -173,11 +173,11 @@ static void __init probe_page_size_mask(void)
 
         /* Enable PSE if available */
         if (cpu_has_pse)
-                set_in_cr4(X86_CR4_PSE);
+                cr4_set_bits_and_update_boot(X86_CR4_PSE);
 
         /* Enable PGE if available */
         if (cpu_has_pge) {
-                set_in_cr4(X86_CR4_PGE);
+                cr4_set_bits_and_update_boot(X86_CR4_PGE);
                 __supported_pte_mask |= _PAGE_GLOBAL;
         } else
                 __supported_pte_mask &= ~_PAGE_GLOBAL;
@@ -239,6 +239,31 @@ static void __init_refok adjust_range_page_size_mask(struct map_range *mr,
         }
 }
 
+static const char *page_size_string(struct map_range *mr)
+{
+        static const char str_1g[] = "1G";
+        static const char str_2m[] = "2M";
+        static const char str_4m[] = "4M";
+        static const char str_4k[] = "4k";
+
+        if (mr->page_size_mask & (1<<PG_LEVEL_1G))
+                return str_1g;
+        /*
+         * 32-bit without PAE has a 4M large page size.
+         * PG_LEVEL_2M is misnamed, but we can at least
+         * print out the right size in the string.
+         */
+        if (IS_ENABLED(CONFIG_X86_32) &&
+            !IS_ENABLED(CONFIG_X86_PAE) &&
+            mr->page_size_mask & (1<<PG_LEVEL_2M))
+                return str_4m;
+
+        if (mr->page_size_mask & (1<<PG_LEVEL_2M))
+                return str_2m;
+
+        return str_4k;
+}
+
 static int __meminit split_mem_range(struct map_range *mr, int nr_range,
                                      unsigned long start,
                                      unsigned long end)
@@ -334,8 +359,7 @@ static int __meminit split_mem_range(struct map_range *mr, int nr_range,
         for (i = 0; i < nr_range; i++)
                 printk(KERN_DEBUG " [mem %#010lx-%#010lx] page %s\n",
                                 mr[i].start, mr[i].end - 1,
-                        (mr[i].page_size_mask & (1<<PG_LEVEL_1G))?"1G":(
-                         (mr[i].page_size_mask & (1<<PG_LEVEL_2M))?"2M":"4k"));
+                                page_size_string(&mr[i]));
 
         return nr_range;
 }
@@ -609,7 +633,7 @@ void __init init_mem_mapping(void)
  *
  *
  * On x86, access has to be given to the first megabyte of ram because that area
- * contains bios code and data regions used by X and dosemu and similar apps.
+ * contains BIOS code and data regions used by X and dosemu and similar apps.
  * Access has to be given to non-kernel-ram areas as well, these contain the PCI
  * mmio resources as well as potential bios/acpi data regions.
  */
@@ -714,6 +738,15 @@ void __init zone_sizes_init(void)
         free_area_init_nodes(max_zone_pfns);
 }
 
+DEFINE_PER_CPU_SHARED_ALIGNED(struct tlb_state, cpu_tlbstate) = {
+#ifdef CONFIG_SMP
+        .active_mm = &init_mm,
+        .state = 0,
+#endif
+        .cr4 = ~0UL,    /* fail hard if we screw up cr4 shadow initialization */
+};
+EXPORT_SYMBOL_GPL(cpu_tlbstate);
+
 void update_cache_mode_entry(unsigned entry, enum page_cache_mode cache)
 {
         /* entry 0 MUST be WB (hardwired to speed up translations) */