linux-kernel - Re: [PATCH] Remove warning in efi_enter_virtual

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Message-ID: <bb2db2a1-835f-47d0-830d-0dd3785343a9@email.android.com>
Date:	Thu, 18 Apr 2013 23:00:27 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Greg KH <gregkh@...uxfoundation.org>,
	"Bryan O'Donoghue" <bryan.odonoghue.lkml@...us-software.ie>
CC:	matt@...sole-pimps.org, matthew.garrett@...ula.com,
	linux-efi@...r.kernel.org, x86@...nel.org,
	linux-kernel@...r.kernel.org, darren.hart@...el.com,
	josh@...htriplett.org, mingo@...nel.org, tglx@...utronix.de
Subject: Re: [PATCH] Remove warning in efi_enter_virtual_mode V2

The only real use for command line options is to be able to get users to test something during troubleshooting.

Greg KH <gregkh@...uxfoundation.org> wrote:

>On Wed, Apr 17, 2013 at 11:05:41PM +0100, Bryan O'Donoghue wrote:
>> Some EFI BIOS stores BGRT data in the wrong place and some EFI based
>> BIOS also requires mapping of boot code/data when doing
>> efi_enter_virtual_mode.
>> 
>> Current code in efi_enter_virtual_mode maps both EFI_RUNTIME_MEMORY
>and
>> BIOS boot code/data.
>> 
>> This patch gives the option to switch off that behavior - if your
>BIOS
>> has neither BGRT - nor bugs that require mapping of EFI boot
>code/data
>
>No, never add new boot options, no users, or distros, know to set them.
>Isn't there some way we can dynamically determine this instead?
>
>thanks,
>
>greg k-h

-- 
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