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

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Message-ID: <20130419055813.GA16443@kroah.com>
Date:	Thu, 18 Apr 2013 22:58:13 -0700
From:	Greg KH <gregkh@...uxfoundation.org>
To:	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, hpa@...or.com, mingo@...nel.org,
	tglx@...utronix.de
Subject: Re: [PATCH] Remove warning in efi_enter_virtual_mode V2

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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