diff options
| -rw-r--r-- | i386/intel/pmap.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/i386/intel/pmap.c b/i386/intel/pmap.c index 76055f8..7cb990a 100644 --- a/i386/intel/pmap.c +++ b/i386/intel/pmap.c @@ -826,26 +826,27 @@ void pmap_set_page_readonly(void *_vaddr) { } /* This needs to be called instead of pmap_set_page_readonly as long as RC3 - * still points to the bootstrap dirbase. */ + * still points to the bootstrap dirbase, to also fix the bootstrap table. */ void pmap_set_page_readonly_init(void *_vaddr) { vm_offset_t vaddr = (vm_offset_t) _vaddr; #if PAE pt_entry_t *pdpbase = (void*) boot_info.pt_base; - vm_offset_t dirbase = ptetokv(pdpbase[lin2pdpnum(vaddr)]); + /* The bootstrap table does not necessarily use contiguous pages for the pde tables */ + pt_entry_t *dirbase = (void*) ptetokv(pdpbase[lin2pdpnum(vaddr)]); #else - vm_offset_t dirbase = boot_info.pt_base; + pt_entry_t *dirbase = (void*) boot_info.pt_base; #endif - struct pmap linear_pmap = { - .dirbase = (void*) dirbase, - }; + pt_entry_t *pte = &dirbase[lin2pdenum(vaddr) & PTEMASK]; /* Modify our future kernel map (can't use update_va_mapping for this)... */ - if (*pmap_pde(kernel_pmap, vaddr) & INTEL_PTE_VALID) + if (*pmap_pde(kernel_pmap, vaddr) & INTEL_PTE_VALID) { if (!hyp_mmu_update_la (kvtolin(vaddr), pa_to_pte (kv_to_ma(vaddr)) | INTEL_PTE_VALID)) panic("couldn't set hiMMU readonly for vaddr %p(%p)\n", vaddr, (vm_offset_t) kv_to_ma (vaddr)); + } /* ... and the bootstrap map. */ - if (*pmap_pde(&linear_pmap, vaddr) & INTEL_PTE_VALID) + if (*pte & INTEL_PTE_VALID) { if (hyp_do_update_va_mapping (vaddr, pa_to_pte (kv_to_ma(vaddr)) | INTEL_PTE_VALID, UVMF_NONE)) panic("couldn't set MMU readonly for vaddr %p(%p)\n", vaddr, (vm_offset_t) kv_to_ma (vaddr)); + } } void pmap_clear_bootstrap_pagetable(pt_entry_t *base) { |