Messages in this thread | | | Date | Tue, 02 Oct 2012 22:35:39 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH] Fix devmem_is_allowed for below 1MB accesses for an efi machine |
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On 10/02/2012 10:28 PM, Matthew Garrett wrote: > On Tue, Oct 02, 2012 at 11:13:17PM -0600, Thavatchai Makphaibulchoke wrote: > >> Sounds like a better solution is to allow accesses to only I/O regions >> presented in the EFI memory map for physical addresses below 1 MB. > > That won't work - unfortunately we do still need the low region to be > available for X because some platforms expect us to use int10 even on > EFI (yes, yes, I know). Do you have a copy of the EFI memory map for a > system that's broken with the current code? >
I honestly think this calls for a quirk, or more likely, no action at all ("don't do that, then.")
-hpa
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