For the 1:1 map we probably should make all pages executable; other things need it too, but we shouldn't have it mapped in except when needed. "huang ying" <huang.ying.caritas at gmail.com> wrote: >On Mon, Aug 16, 2010 at 11:27 AM, H. Peter Anvin <hpa at zytor.com> wrote: >> No, it should not be dynamic; rather we should unify all the users who need a 1:1 map and just keep that page table set around. > >Agree. One known issue of global 1:1 map is that we need to make at >least part of page table PAGE_KERNEL_EXEC for EFI runtime code, and >change_page_attr can not be used before page allocator is available. > >Best Regards, >Huang Ying -- Sent from my mobile phone. Please pardon any lack of formatting.
