Messages in this thread | | | Date | Mon, 28 Sep 2015 08:16:46 +0200 | From | Ingo Molnar <> | Subject | Re: [PATCH 1/2] x86/efi: Map EFI memmap entries in-order at runtime |
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* Matthew Garrett <mjg59@srcf.ucam.org> wrote:
> On Sun, Sep 27, 2015 at 09:30:48AM -0700, Andy Lutomirski wrote: > > On Sep 26, 2015 1:19 PM, "H. Peter Anvin" <hpa@zytor.com> wrote: > > > > > > Sadly a lot of firmware is known to fail in that configuration :( That was very much our guest choice. > > > > > > > Why can't we map everything completely 1:1 (VA = PA) and call the > > setVA thing but pass it literally the identity. > > Last time I tried this I found that some firmware makes assumptions > about having high addresses.
So the question is, what does Windows do?
PC firmware is a hostile environment for Linux, to be compatible the best we can do is to mimic the environment that the firmware is tested under - i.e. try to use the firmware in the way Windows uses it.
Thanks,
Ingo
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