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From: Ingo Molnar <mingo@kernel.org>
To: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: Borislav Petkov <bp@alien8.de>,
	Linux EFI <linux-efi@vger.kernel.org>,
	Matt Fleming <matt@console-pimps.org>, X86 ML <x86@kernel.org>,
	LKML <linux-kernel@vger.kernel.org>, Borislav Petkov <bp@suse.de>
Subject: Re: [PATCH -v2 0/4] EFI 1:1 mapping
Date: Thu, 20 Jun 2013 11:22:37 +0200	[thread overview]
Message-ID: <20130620092237.GA6943@gmail.com> (raw)
In-Reply-To: <20130620091537.GA17159@srcf.ucam.org>


* Matthew Garrett <mjg59@srcf.ucam.org> wrote:

> On Thu, Jun 20, 2013 at 11:13:21AM +0200, Ingo Molnar wrote:
> 
> > Cool - and supposedly this will work in a Mac environment as well? Would 
> > be very nice to avoid fundamentally fragile system specific quirks for 
> > something as fundamental as the EFI runtime memory mapping model ...
> 
> Apple is the only case where I'd expect there to be an issue, since they 
> only started supporting booting Windows via UEFI on very recent systems. 
> However, unless they're actually sniffing the page tables on UEFI entry, 
> I can't see any way that this could break things???

Agreed - I was susprised to see that the runtime was able to _break_ in 
any way due to 1:1: my assumption was that it can only get better.

But I did not realize that the 1:1 boot flag also changed what was passed 
down, which probably explains the breakages.

I'd even argue to not do this whole boot flag thing at all - just 
standardize on the Windows compatibility model as closely as possible.

Thanks,

	Ingo

  reply	other threads:[~2013-06-20  9:22 UTC|newest]

Thread overview: 53+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-06-17 17:50 [PATCH -v2 0/4] EFI 1:1 mapping Borislav Petkov
2013-06-17 17:50 ` [PATCH -v2 1/4] efi: Convert runtime services function ptrs Borislav Petkov
2013-06-20 18:15   ` [PATCH] [IA64] sim: Add casts to avoid assignment warnings Luck, Tony
2013-06-20 23:43     ` Tony Luck
2013-06-21 10:26       ` Fleming, Matt
2013-06-17 17:50 ` [PATCH -v2 2/4] x86, cpa: Map in an arbitrary pgd Borislav Petkov
2013-06-17 17:50 ` [PATCH -v2 3/4] x86, efi: Add an efi= kernel command line parameter Borislav Petkov
2013-06-17 17:50 ` [PATCH -v2 4/4] x86, efi: Map runtime services 1:1 Borislav Petkov
2013-06-21 11:56   ` Matt Fleming
2013-07-03  6:19   ` joeyli
2013-06-19 12:52 ` [PATCH -v2 0/4] EFI 1:1 mapping Ingo Molnar
2013-06-19 13:02   ` Borislav Petkov
2013-06-19 13:04     ` Ingo Molnar
2013-06-19 13:25       ` Borislav Petkov
2013-06-19 16:08       ` Matthew Garrett
2013-06-19 16:18         ` Borislav Petkov
2013-06-19 16:21           ` Matthew Garrett
2013-06-19 16:38             ` Borislav Petkov
2013-06-19 16:48               ` Matthew Garrett
2013-06-19 16:59                 ` Borislav Petkov
2013-06-20 21:26                   ` H. Peter Anvin
2013-06-21  6:34                   ` Matt Fleming
2013-06-19 16:50               ` James Bottomley
2013-06-20  9:13         ` Ingo Molnar
2013-06-20  9:15           ` Matthew Garrett
2013-06-20  9:22             ` Ingo Molnar [this message]
2013-06-20  9:33               ` Borislav Petkov
2013-06-20  9:44                 ` Matthew Garrett
2013-06-20 14:33                   ` Jiri Kosina
2013-06-20 14:53                   ` James Bottomley
2013-06-20 16:29                     ` Matthew Garrett
2013-06-20 16:44                       ` Jiri Kosina
2013-06-20 16:53                         ` Matthew Garrett
2013-06-20 16:46                       ` James Bottomley
2013-06-20 16:54                         ` Matthew Garrett
2013-06-20 17:01                           ` Borislav Petkov
2013-06-20 17:12                             ` Matthew Garrett
2013-06-20 18:08                               ` Borislav Petkov
2013-06-20 18:10                                 ` Matthew Garrett
2013-06-20 18:14                                   ` Borislav Petkov
2013-06-20 18:17                                     ` Matthew Garrett
2013-06-20 18:47                                       ` Borislav Petkov
2013-06-20 22:35                                         ` H. Peter Anvin
2013-06-21  7:23                                           ` Borislav Petkov
2013-06-21 10:05                                             ` H. Peter Anvin
2013-06-21 14:21                                               ` Borislav Petkov
2013-06-21 16:42                                                 ` H. Peter Anvin
2013-07-02  7:29                                                   ` Pavel Machek
2013-06-19 16:05     ` Matthew Garrett
2013-06-19 17:25     ` H. Peter Anvin
2013-06-19 17:37       ` Borislav Petkov
2013-06-19 17:38         ` H. Peter Anvin
2013-06-19 17:50           ` Borislav Petkov

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