diff options
Diffstat (limited to 'arch/x86/xen/mmu_pv.c')
| -rw-r--r-- | arch/x86/xen/mmu_pv.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/x86/xen/mmu_pv.c b/arch/x86/xen/mmu_pv.c index 3254eaa88471..c80d0058efd1 100644 --- a/arch/x86/xen/mmu_pv.c +++ b/arch/x86/xen/mmu_pv.c @@ -105,6 +105,9 @@ pte_t xen_make_pte_init(pteval_t pte); static pud_t level3_user_vsyscall[PTRS_PER_PUD] __page_aligned_bss; #endif +static pud_t level3_ident_pgt[PTRS_PER_PUD] __page_aligned_bss; +static pmd_t level2_ident_pgt[PTRS_PER_PMD] __page_aligned_bss; + /* * Protects atomic reservation decrease/increase against concurrent increases. * Also protects non-atomic updates of current_pages and balloon lists. @@ -1777,6 +1780,12 @@ void __init xen_setup_kernel_pagetable(pgd_t *pgd, unsigned long max_pfn) /* Zap identity mapping */ init_top_pgt[0] = __pgd(0); + init_top_pgt[pgd_index(__PAGE_OFFSET_BASE_L4)].pgd = + __pa_symbol(level3_ident_pgt) + _KERNPG_TABLE_NOENC; + init_top_pgt[pgd_index(__START_KERNEL_map)].pgd = + __pa_symbol(level3_kernel_pgt) + _PAGE_TABLE_NOENC; + level3_ident_pgt[0].pud = __pa_symbol(level2_ident_pgt) + _KERNPG_TABLE_NOENC; + /* Pre-constructed entries are in pfn, so convert to mfn */ /* L4[273] -> level3_ident_pgt */ /* L4[511] -> level3_kernel_pgt */ |