linux-kernel - Re: [patch 0/7 v2] kexec kernel efi runtime support

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Date:	Mon, 11 Nov 2013 10:13:56 +0800
From:	Dave Young <dyoung@...hat.com>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Matt Fleming <matt@...sole-pimps.org>,
	linux-kernel@...r.kernel.org, linux-efi@...r.kernel.org,
	x86@...nel.org, mjg59@...f.ucam.org,
	James.Bottomley@...senPartnership.com, vgoyal@...hat.com,
	ebiederm@...ssion.com, horms@...ge.net.au,
	kexec@...ts.infradead.org, bp@...en8.de
Subject: Re: [patch 0/7 v2] kexec kernel efi runtime support

On 11/08/13 at 09:01pm, H. Peter Anvin wrote:
> On 11/08/2013 07:57 PM, Dave Young wrote:
> > 
> > Hmm, if CONFIG_DEBUG_BOOT_PARAMS is not set, then kexec-tools should
> > fail getting efi_info, so I will fix kexec-tools patch about this.
> > 
> > Also CONFIG_EFI_RUNTIME_MAP should select CONFIG_DEBUG_BOOT_PARAMS.
> > In future will try to move the boot params data out of debugfs. 
> > 
> 
> Honestly, if we need debugfs to get actual functionality, it shouldn't
> be in sploit^Wdebugfs...
> 

Huang Ying <ying.huang@...el.com> created the debugfs file for boot_params.
His first version patch tried sysfs, but sysfs is not designed for such
binary blobs so finally it go to debugfs.

Any idea for this is welcome, till now I have no better idea for such kind
of data. We should have another *fs instead of using debugfs.

Thanks
Dave
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