xen: switch to linear virtual mapped sparse p2m list

[cascardo/linux.git] / arch / x86 / xen / mmu.c

diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index 3e3f8f8..6ab6150 100644 (file)
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -1158,20 +1158,16 @@ static void __init xen_cleanhighmap(unsigned long vaddr,
         * instead of somewhere later and be confusing. */
        xen_mc_flush();
 }
-static void __init xen_pagetable_p2m_copy(void)
+
+static void __init xen_pagetable_p2m_free(void)
 {
        unsigned long size;
        unsigned long addr;
-       unsigned long new_mfn_list;
-
-       if (xen_feature(XENFEAT_auto_translated_physmap))
-               return;
 
        size = PAGE_ALIGN(xen_start_info->nr_pages * sizeof(unsigned long));
 
-       new_mfn_list = xen_revector_p2m_tree();
        /* No memory or already called. */
-       if (!new_mfn_list || new_mfn_list == xen_start_info->mfn_list)
+       if ((unsigned long)xen_p2m_addr == xen_start_info->mfn_list)
                return;
 
        /* using __ka address and sticking INVALID_P2M_ENTRY! */
@@ -1189,8 +1185,6 @@ static void __init xen_pagetable_p2m_copy(void)
 
        size = PAGE_ALIGN(xen_start_info->nr_pages * sizeof(unsigned long));
        memblock_free(__pa(xen_start_info->mfn_list), size);
-       /* And revector! Bye bye old array */
-       xen_start_info->mfn_list = new_mfn_list;
 
        /* At this stage, cleanup_highmap has already cleaned __ka space
         * from _brk_limit way up to the max_pfn_mapped (which is the end of
@@ -1214,14 +1208,26 @@ static void __init xen_pagetable_p2m_copy(void)
 }
 #endif
 
-static void __init xen_pagetable_init(void)
+static void __init xen_pagetable_p2m_setup(void)
 {
-       paging_init();
+       if (xen_feature(XENFEAT_auto_translated_physmap))
+               return;
+
+       xen_vmalloc_p2m_tree();
+
 #ifdef CONFIG_X86_64
-       xen_pagetable_p2m_copy();
-#else
-       xen_revector_p2m_tree();
+       xen_pagetable_p2m_free();
 #endif
+       /* And revector! Bye bye old array */
+       xen_start_info->mfn_list = (unsigned long)xen_p2m_addr;
+}
+
+static void __init xen_pagetable_init(void)
+{
+       paging_init();
+
+       xen_pagetable_p2m_setup();
+
        /* Allocate and initialize top and mid mfn levels for p2m structure */
        xen_build_mfn_list_list();