x86: kill bad_ppro

so don't punish all other cpus without that problem when init highmem

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

3 files changed, 23 insertions, 33 deletions

diff --git a/arch/x86/kernel/setup_32.c b/arch/x86/kernel/setup_32.c
index f3ddba5ed9a7..9692aeb8ecae 100644
--- a/arch/x86/kernel/setup_32.c
+++ b/arch/x86/kernel/setup_32.c
@@ -68,6 +68,7 @@
 #include <asm/cacheflush.h>
 #include <asm/processor.h>
 #include <asm/efi.h>
+#include <asm/bugs.h>
 
 /* This value is set up by the early boot code to point to the value
    immediately after the boot time page tables.  It contains a *physical*
@@ -764,6 +765,14 @@ void __init setup_arch(char **cmdline_p)
         if (efi_enabled)
                 efi_init();
 
+        if (ppro_with_ram_bug()) {
+                e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM,
+                                  E820_RESERVED);
+                sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
+                printk(KERN_INFO "fixed physical RAM map:\n");
+                e820_print_map("bad_ppro");
+        }
+
         e820_register_active_regions(0, 0, -1UL);
         /*
          * partially used pages are not usable - thus
diff --git a/arch/x86/mm/discontig_32.c b/arch/x86/mm/discontig_32.c
index 7c4d0255f8d8..6216e43b6e95 100644
--- a/arch/x86/mm/discontig_32.c
+++ b/arch/x86/mm/discontig_32.c
@@ -427,7 +427,7 @@ void __init zone_sizes_init(void)
         return;
 }
 
-void __init set_highmem_pages_init(int bad_ppro) 
+void __init set_highmem_pages_init(void)
 {
 #ifdef CONFIG_HIGHMEM
         struct zone *zone;
@@ -447,7 +447,7 @@ void __init set_highmem_pages_init(int bad_ppro)
                                 zone->name, nid, zone_start_pfn, zone_end_pfn);
 
                 add_highpages_with_active_regions(nid, zone_start_pfn,
-                                 zone_end_pfn, bad_ppro);
+                                 zone_end_pfn);
         }
         totalram_pages += totalhigh_pages;
 #endif
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index ba07a489230e..fb5694d788bf 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -220,13 +220,6 @@ static void __init kernel_physical_mapping_init(pgd_t *pgd_base)
         }
 }
 
-static inline int page_kills_ppro(unsigned long pagenr)
-{
-        if (pagenr >= 0x70000 && pagenr <= 0x7003F)
-                return 1;
-        return 0;
-}
-
 /*
  * devmem_is_allowed() checks to see if /dev/mem access to a certain address
  * is valid. The argument is a physical page number.
@@ -287,22 +280,17 @@ static void __init permanent_kmaps_init(pgd_t *pgd_base)
         pkmap_page_table = pte;
 }
 
-static void __init
-add_one_highpage_init(struct page *page, int pfn, int bad_ppro)
+static void __init add_one_highpage_init(struct page *page, int pfn)
 {
-        if (!(bad_ppro && page_kills_ppro(pfn))) {
-                ClearPageReserved(page);
-                init_page_count(page);
-                __free_page(page);
-                totalhigh_pages++;
-        } else
-                SetPageReserved(page);
+        ClearPageReserved(page);
+        init_page_count(page);
+        __free_page(page);
+        totalhigh_pages++;
 }
 
 struct add_highpages_data {
         unsigned long start_pfn;
         unsigned long end_pfn;
-        int bad_ppro;
 };
 
 static void __init add_highpages_work_fn(unsigned long start_pfn,
@@ -312,10 +300,8 @@ static void __init add_highpages_work_fn(unsigned long start_pfn,
         struct page *page;
         unsigned long final_start_pfn, final_end_pfn;
         struct add_highpages_data *data;
-        int bad_ppro;
 
         data = (struct add_highpages_data *)datax;
-        bad_ppro = data->bad_ppro;
 
         final_start_pfn = max(start_pfn, data->start_pfn);
         final_end_pfn = min(end_pfn, data->end_pfn);
@@ -327,29 +313,26 @@ static void __init add_highpages_work_fn(unsigned long start_pfn,
                 if (!pfn_valid(node_pfn))
                         continue;
                 page = pfn_to_page(node_pfn);
-                add_one_highpage_init(page, node_pfn, bad_ppro);
+                add_one_highpage_init(page, node_pfn);
         }
 
 }
 
 void __init add_highpages_with_active_regions(int nid, unsigned long start_pfn,
-                                              unsigned long end_pfn,
-                                              int bad_ppro)
+                                              unsigned long end_pfn)
 {
         struct add_highpages_data data;
 
         data.start_pfn = start_pfn;
         data.end_pfn = end_pfn;
-        data.bad_ppro = bad_ppro;
 
         work_with_active_regions(nid, add_highpages_work_fn, &data);
 }
 
 #ifndef CONFIG_NUMA
-static void __init set_highmem_pages_init(int bad_ppro)
+static void __init set_highmem_pages_init(void)
 {
-        add_highpages_with_active_regions(0, highstart_pfn, highend_pfn,
-                                                bad_ppro);
+        add_highpages_with_active_regions(0, highstart_pfn, highend_pfn);
 
         totalram_pages += totalhigh_pages;
 }
@@ -358,7 +341,7 @@ static void __init set_highmem_pages_init(int bad_ppro)
 #else
 # define kmap_init()                            do { } while (0)
 # define permanent_kmaps_init(pgd_base)         do { } while (0)
-# define set_highmem_pages_init(bad_ppro)       do { } while (0)
+# define set_highmem_pages_init()       do { } while (0)
 #endif /* CONFIG_HIGHMEM */
 
 pteval_t __PAGE_KERNEL = _PAGE_KERNEL;
@@ -605,13 +588,11 @@ static struct kcore_list kcore_mem, kcore_vmalloc;
 void __init mem_init(void)
 {
         int codesize, reservedpages, datasize, initsize;
-        int tmp, bad_ppro;
+        int tmp;
 
 #ifdef CONFIG_FLATMEM
         BUG_ON(!mem_map);
 #endif
-        bad_ppro = ppro_with_ram_bug();
-
 #ifdef CONFIG_HIGHMEM
         /* check that fixmap and pkmap do not overlap */
         if (PKMAP_BASE + LAST_PKMAP*PAGE_SIZE >= FIXADDR_START) {
@@ -634,7 +615,7 @@ void __init mem_init(void)
                 if (page_is_ram(tmp) && PageReserved(pfn_to_page(tmp)))
                         reservedpages++;
 
-        set_highmem_pages_init(bad_ppro);
+        set_highmem_pages_init();
 
         codesize =  (unsigned long) &_etext - (unsigned long) &_text;
         datasize =  (unsigned long) &_edata - (unsigned long) &_etext;