[PATCH] MM: page allocation hooks for VMI backend

[pandora-kernel.git] / arch / i386 / mm / init.c

diff --git a/arch/i386/mm/init.c b/arch/i386/mm/init.c
index efd0bcd..ae43688 100644 (file)
--- a/arch/i386/mm/init.c
+++ b/arch/i386/mm/init.c
@@ -62,6 +62,7 @@ static pmd_t * __init one_md_table_init(pgd_t *pgd)
                
 #ifdef CONFIG_X86_PAE
        pmd_table = (pmd_t *) alloc_bootmem_low_pages(PAGE_SIZE);
+       paravirt_alloc_pd(__pa(pmd_table) >> PAGE_SHIFT);
        set_pgd(pgd, __pgd(__pa(pmd_table) | _PAGE_PRESENT));
        pud = pud_offset(pgd, 0);
        if (pmd_table != pmd_offset(pud, 0)) 
@@ -82,6 +83,7 @@ static pte_t * __init one_page_table_init(pmd_t *pmd)
 {
        if (pmd_none(*pmd)) {
                pte_t *page_table = (pte_t *) alloc_bootmem_low_pages(PAGE_SIZE);
+               paravirt_alloc_pt(__pa(page_table) >> PAGE_SHIFT);
                set_pmd(pmd, __pmd(__pa(page_table) | _PAGE_TABLE));
                if (page_table != pte_offset_kernel(pmd, 0))
                        BUG();  
@@ -192,8 +194,6 @@ static inline int page_kills_ppro(unsigned long pagenr)
        return 0;
 }
 
-extern int is_available_memory(efi_memory_desc_t *);
-
 int page_is_ram(unsigned long pagenr)
 {
        int i;
@@ -285,7 +285,7 @@ void __init add_one_highpage_init(struct page *page, int pfn, int bad_ppro)
                SetPageReserved(page);
 }
 
-static int add_one_highpage_hotplug(struct page *page, unsigned long pfn)
+static int __meminit add_one_highpage_hotplug(struct page *page, unsigned long pfn)
 {
        free_new_highpage(page);
        totalram_pages++;
@@ -302,7 +302,7 @@ static int add_one_highpage_hotplug(struct page *page, unsigned long pfn)
  * has been added dynamically that would be
  * onlined here is in HIGHMEM
  */
-void online_page(struct page *page)
+void __meminit online_page(struct page *page)
 {
        ClearPageReserved(page);
        add_one_highpage_hotplug(page, page_to_pfn(page));
@@ -347,6 +347,8 @@ static void __init pagetable_init (void)
        /* Init entries of the first-level page table to the zero page */
        for (i = 0; i < PTRS_PER_PGD; i++)
                set_pgd(pgd_base + i, __pgd(__pa(empty_zero_page) | _PAGE_PRESENT));
+#else
+       paravirt_alloc_pd(__pa(swapper_pg_dir) >> PAGE_SHIFT);
 #endif
 
        /* Enable PSE if available */
@@ -435,16 +437,22 @@ u64 __supported_pte_mask __read_mostly = ~_PAGE_NX;
  * on      Enable
  * off     Disable
  */
-void __init noexec_setup(const char *str)
+static int __init noexec_setup(char *str)
 {
-       if (!strncmp(str, "on",2) && cpu_has_nx) {
-               __supported_pte_mask |= _PAGE_NX;
-               disable_nx = 0;
-       } else if (!strncmp(str,"off",3)) {
+       if (!str || !strcmp(str, "on")) {
+               if (cpu_has_nx) {
+                       __supported_pte_mask |= _PAGE_NX;
+                       disable_nx = 0;
+               }
+       } else if (!strcmp(str,"off")) {
                disable_nx = 1;
                __supported_pte_mask &= ~_PAGE_NX;
-       }
+       } else
+               return -EINVAL;
+
+       return 0;
 }
+early_param("noexec", noexec_setup);
 
 int nx_enabled = 0;
 #ifdef CONFIG_X86_PAE
@@ -487,6 +495,7 @@ int __init set_kernel_exec(unsigned long vaddr, int enable)
                pte->pte_high &= ~(1 << (_PAGE_BIT_NX - 32));
        else
                pte->pte_high |= 1 << (_PAGE_BIT_NX - 32);
+       pte_update_defer(&init_mm, vaddr, pte);
        __flush_tlb_all();
 out:
        return ret;
@@ -552,18 +561,6 @@ static void __init test_wp_bit(void)
        }
 }
 
-static void __init set_max_mapnr_init(void)
-{
-#ifdef CONFIG_HIGHMEM
-       num_physpages = highend_pfn;
-#else
-       num_physpages = max_low_pfn;
-#endif
-#ifdef CONFIG_FLATMEM
-       max_mapnr = num_physpages;
-#endif
-}
-
 static struct kcore_list kcore_mem, kcore_vmalloc; 
 
 void __init mem_init(void)
@@ -574,8 +571,7 @@ void __init mem_init(void)
        int bad_ppro;
 
 #ifdef CONFIG_FLATMEM
-       if (!mem_map)
-               BUG();
+       BUG_ON(!mem_map);
 #endif
        
        bad_ppro = ppro_with_ram_bug();
@@ -590,14 +586,6 @@ void __init mem_init(void)
        }
 #endif
  
-       set_max_mapnr_init();
-
-#ifdef CONFIG_HIGHMEM
-       high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1;
-#else
-       high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1;
-#endif
-
        /* this will put all low memory onto the freelists */
        totalram_pages += free_all_bootmem();
 
@@ -689,16 +677,10 @@ void __init mem_init(void)
 #endif
 }
 
-/*
- * this is for the non-NUMA, single node SMP system case.
- * Specifically, in the case of x86, we will always add
- * memory to the highmem for now.
- */
 #ifdef CONFIG_MEMORY_HOTPLUG
-#ifndef CONFIG_NEED_MULTIPLE_NODES
 int arch_add_memory(int nid, u64 start, u64 size)
 {
-       struct pglist_data *pgdata = &contig_page_data;
+       struct pglist_data *pgdata = NODE_DATA(nid);
        struct zone *zone = pgdata->node_zones + ZONE_HIGHMEM;
        unsigned long start_pfn = start >> PAGE_SHIFT;
        unsigned long nr_pages = size >> PAGE_SHIFT;
@@ -710,11 +692,11 @@ int remove_memory(u64 start, u64 size)
 {
        return -EINVAL;
 }
-#endif
+EXPORT_SYMBOL_GPL(remove_memory);
 #endif
 
-kmem_cache_t *pgd_cache;
-kmem_cache_t *pmd_cache;
+struct kmem_cache *pgd_cache;
+struct kmem_cache *pmd_cache;
 
 void __init pgtable_cache_init(void)
 {