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Date: Wed, 19 Jun 2013 19:37:21 +0200 From: Borislav Petkov <bp@...en8.de> To: "H. Peter Anvin" <hpa@...or.com> Cc: Ingo Molnar <mingo@...nel.org>, Linux EFI <linux-efi@...r.kernel.org>, Matt Fleming <matt@...sole-pimps.org>, Matthew Garrett <mjg59@...f.ucam.org>, X86 ML <x86@...nel.org>, LKML <linux-kernel@...r.kernel.org>, Borislav Petkov <bp@...e.de> Subject: Re: [PATCH -v2 0/4] EFI 1:1 mapping On Wed, Jun 19, 2013 at 12:25:42PM -0500, H. Peter Anvin wrote: > On 06/19/2013 08:02 AM, Borislav Petkov wrote: > > > > And yet there are the Macs which reportedly cannot stomach this. > > > No, the reports are that if you use the 1:1 map as the primary address > on Macs the drivers fail... not that you can't have a 1:1 map. That's what I meant: ... cannot stomach when the 1:1 map is shoved down SetVirtualAddressMap. The thing is, if we want to have both the 1:1 map and the high map during an EFI runtime call, we would need to *always* switch the pagetable for an EFI runtime call and establish both mappings in ->trampoline_pgd beforehand. -- Regards/Gruss, Boris. Sent from a fat crate under my desk. Formatting is fine. -- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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