From: "Longhorn" <mmediouni@gmx.fr>
To: "'The development of GNU GRUB'" <grub-devel@gnu.org>
Subject: RE: Windows on ARM machines : UEFI bugs
Date: Tue, 23 Aug 2016 13:45:11 +0200 [thread overview]
Message-ID: <006b01d1fd33$cf029f30$6d07dd90$@gmx.fr> (raw)
In-Reply-To: <CAA91j0VQraGtoaWZ4wBBYv+6o--w4jifghhDUa2aJo5NEKaPnA@mail.gmail.com>
Yes, I see an infinite ExitBootServices loop that prevents booting.
-----Message d'origine-----
De : Grub-devel [mailto:grub-devel-bounces+mmediouni=gmx.fr@gnu.org] De la part de Andrei Borzenkov
Envoyé : mardi 23 août 2016 13:44
À : The development of GNU GRUB <grub-devel@gnu.org>
Objet : Re: Windows on ARM machines : UEFI bugs
On Tue, Aug 23, 2016 at 2:21 PM, Longhorn <mmediouni@gmx.fr> wrote:
> Load a Linux kernel on Grub for UEFI on ARM.
>
In this case grub should retry ExitBootServices again. If ExitBootServices always returns EFI_INVALID_PARAMETER, grub will retry it indefinitely. Is it what you see? If not, *WHAT* do you see?
> -----Message d'origine-----
> De : Grub-devel [mailto:grub-devel-bounces+mmediouni=gmx.fr@gnu.org]
> De la part de Andrei Borzenkov Envoyé : mardi 23 août 2016 13:20 À :
> The development of GNU GRUB <grub-devel@gnu.org> Objet : Re: Windows
> on ARM machines : UEFI bugs
>
> On Tue, Aug 23, 2016 at 2:18 PM, Longhorn <mmediouni@gmx.fr> wrote:
>> The call to ExitBootServices as done by Grub returns EFI_INVALID_PARAMETER from the firmware.
>>
>
> grub has many different loaders. What exactly are you doing?
>
>> -----Message d'origine-----
>> De : Grub-devel [mailto:grub-devel-bounces+mmediouni=gmx.fr@gnu.org]
>> De la part de Andrei Borzenkov Envoyé : mardi 23 août 2016 13:11 À :
>> The development of GNU GRUB <grub-devel@gnu.org> Objet : Re: Windows
>> on ARM machines : UEFI bugs
>>
>> On Tue, Aug 23, 2016 at 1:24 PM, my123 (@never_released) <mmediouni@gmx.fr> wrote:
>>>
>>> It returns EFI_INVALID_PARAMETER and refuses to work here.
>>
>> What is "it"? What exactly are you doing?
>>
>>> (I didn't try to reverse engineer how Windows does it, yet)
>>> -----Mesej
>>> Asli-----
>>> Daripada: Grub-devel
>>> [mailto:grub-devel-bounces+mmediouni=gmx.fr@gnu.org] Bagi Pihak
>>> Andrei Borzenkov
>>> Hantar: mardi 23 août 2016 12:09
>>> Kepada: The development of GNU GRUB <grub-devel@gnu.org>
>>> Subjek: Re: Windows on ARM machines : UEFI bugs
>>>
>>> On Tue, Aug 23, 2016 at 12:39 PM, my123 (@never_released) <mmediouni@gmx.fr> wrote:
>>>> Note that on the Surface RT, the first GOP handle is unusable, th
>>>> search for handles has to start at handle 1. This bug doesn’t
>>>> affect other WoA devices.
>>>>
>>>
>>> Well, someone who has access to such devices needs to find out how to detect this condition.
>>>
>>>>
>>>>
>>>> On WoA(Windows on ARM) machines, ExitBootServices doesn’t work,
>>>> especially on nVidia devices. What action should be taken?
>>>>
>>>
>>> Not sure I understand what you say. Could you elaborate on what you are trying to do and what does not work? For booting Windows loader is launched as EFI executable so no ExitBootServices happens.
>>>
>>>>
>>>>
>>>> (this is a part of the port of Linux to these machines, after
>>>> neutralizing Secure Boot)
>>>>
>>>
>>> _______________________________________________
>>> Grub-devel mailing list
>>> Grub-devel@gnu.org
>>> https://lists.gnu.org/mailman/listinfo/grub-devel
>>>
>>>
>>> _______________________________________________
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>>> Grub-devel@gnu.org
>>> https://lists.gnu.org/mailman/listinfo/grub-devel
>>
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>
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prev parent reply other threads:[~2016-08-23 11:45 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-23 9:32 Windows on ARM machines : UEFI bugs my123 (@never_released)
2016-08-23 9:39 ` my123 (@never_released)
2016-08-23 10:09 ` Andrei Borzenkov
2016-08-23 10:24 ` my123 (@never_released)
2016-08-23 10:28 ` Longhorn
2016-08-23 11:10 ` Andrei Borzenkov
2016-08-23 11:18 ` Longhorn
2016-08-23 11:20 ` Andrei Borzenkov
2016-08-23 11:21 ` Longhorn
2016-08-23 11:43 ` Andrei Borzenkov
2016-08-23 11:45 ` Longhorn [this message]
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