xen: partially revert "xen: set max_pfn_mapped to the last pfn mapped"

[linux-imx.git] / arch / x86 / xen / mmu.c

diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index 4916176c53e3ae3f0672d0b4bc91a3b0b58dbe9f..96cdf7806972390d5fcecfa745c3db3cc2bf85cb 100644 (file)
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -1641,6 +1641,11 @@ static __init void xen_map_identity_early(pmd_t *pmd, unsigned long max_pfn)
                for (pteidx = 0; pteidx < PTRS_PER_PTE; pteidx++, pfn++) {
                        pte_t pte;
 
+#ifdef CONFIG_X86_32
+                       if (pfn > max_pfn_mapped)
+                               max_pfn_mapped = pfn;
+#endif
+
                        if (!pte_none(pte_page[pteidx]))
                                continue;
 
@@ -1753,7 +1758,9 @@ __init pgd_t *xen_setup_kernel_pagetable(pgd_t *pgd,
 {
        pmd_t *kernel_pmd;
 
-       max_pfn_mapped = PFN_DOWN(__pa(xen_start_info->mfn_list));
+       max_pfn_mapped = PFN_DOWN(__pa(xen_start_info->pt_base) +
+                                 xen_start_info->nr_pt_frames * PAGE_SIZE +
+                                 512*1024);
 
        kernel_pmd = m2v(pgd[KERNEL_PGD_BOUNDARY].pgd);
        memcpy(level2_kernel_pgt, kernel_pmd, sizeof(pmd_t) * PTRS_PER_PMD);