Messages in this thread | | | Subject | Re: [PATCH][EFI] Run EFI in physical mode | From | "H. Peter Anvin" <> | Date | Sun, 15 Aug 2010 22:08:43 -0700 |
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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@gmail.com> wrote:
>On Mon, Aug 16, 2010 at 11:27 AM, H. Peter Anvin <hpa@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.
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