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From: Matt Fleming <matt-HNK1S37rvNbeXh+fF434Mdi2O/JbrIOy@public.gmane.org>
To: David Woodhouse <dwmw2-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
Cc: James Bottomley
	<James.Bottomley-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>,
	linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	Jordan L Justen
	<jordan.l.justen-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Subject: Re: Curious crash with secure variables
Date: Mon, 18 Mar 2013 15:16:34 +0000	[thread overview]
Message-ID: <51472FD2.6020205@console-pimps.org> (raw)
In-Reply-To: <1363619058.11342.74.camel-W2I5cNIroUsVm/YvaOjsyQ@public.gmane.org>

On 03/18/2013 03:04 PM, David Woodhouse wrote:
> On Mon, 2013-03-18 at 15:02 +0000, Matt Fleming wrote:
>> On 03/18/2013 02:23 PM, James Bottomley wrote:
>>> Yes, it's a phenomenally complicated operation from looking at the
>>> TianoCore source ... might we not be better off not bothering to
>>> relocate and just using a private physical mapping for the calls?
>>
>> Yeah, there have been various discussions about doing this. I sent some
>> patches last year but they broke various non-EFI machines and I haven't
>> had chance to pick it up again.
> 
> Got a pointer? I may take a look...
> 

See,

  commit 53b87cf0 ("x86, mm: Include the entire kernel memory map in trampoline_pgd"),
  commit 185034e7 ("x86, efi: 1:1 pagetable mapping for virtual EFI calls"),
  commit da5a108d05b4 ("x86/kernel: remove tboot 1:1 page table creation code") and 
  commit bd52276fa1d4 ("x86-64/efi: Use EFI to deal with platform wall clock (again)")

 and the two revert commits from Linus, be354f40 and 11520e5e.

-- 
Matt Fleming, Intel Open Source Technology Center

  parent reply	other threads:[~2013-03-18 15:16 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-03-18  8:01 Curious crash with secure variables James Bottomley
     [not found] ` <1363593684.2412.5.camel-sFMDBYUN5F8GjUHQrlYNx2Wm91YjaHnnhRte9Li2A+AAvxtiuMwx3w@public.gmane.org>
2013-03-18 11:49   ` Matt Fleming
     [not found]     ` <1363607345.15011.339.camel-ZqTwcBeJ+wsBof6jY8KHXm7IUlhRatedral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2013-03-18 14:23       ` James Bottomley
     [not found]         ` <1363616613.2412.19.camel-sFMDBYUN5F8GjUHQrlYNx2Wm91YjaHnnhRte9Li2A+AAvxtiuMwx3w@public.gmane.org>
2013-03-18 14:32           ` David Woodhouse
2013-03-18 15:02           ` Matt Fleming
     [not found]             ` <51472C81.5020801-HNK1S37rvNbeXh+fF434Mdi2O/JbrIOy@public.gmane.org>
2013-03-18 15:04               ` David Woodhouse
     [not found]                 ` <1363619058.11342.74.camel-W2I5cNIroUsVm/YvaOjsyQ@public.gmane.org>
2013-03-18 15:16                   ` Matt Fleming [this message]
     [not found]                     ` <51472FD2.6020205-HNK1S37rvNbeXh+fF434Mdi2O/JbrIOy@public.gmane.org>
2013-03-18 15:32                       ` David Woodhouse
     [not found]                         ` <1363620768.11342.76.camel-W2I5cNIroUsVm/YvaOjsyQ@public.gmane.org>
2013-03-18 18:04                           ` Matt Fleming
     [not found]                             ` <51475735.40201-HNK1S37rvNbeXh+fF434Mdi2O/JbrIOy@public.gmane.org>
2013-03-18 18:22                               ` H. Peter Anvin

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