linux-kernel - Re: [PATCH v4 09/12] x86: add xloadflags bit for efi runtime support on kexec

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Date:	Wed, 27 Nov 2013 15:27:32 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	Dave Young <dyoung@...hat.com>
Cc:	linux-kernel@...r.kernel.org, linux-efi@...r.kernel.org,
	x86@...nel.org, mjg59@...f.ucam.org, hpa@...or.com,
	James.Bottomley@...senPartnership.com, vgoyal@...hat.com,
	ebiederm@...ssion.com, horms@...ge.net.au,
	kexec@...ts.infradead.org, greg@...ah.com, matt@...sole-pimps.org,
	toshi.kani@...com
Subject: Re: [PATCH v4 09/12] x86: add xloadflags bit for efi runtime support
 on kexec

On Tue, Nov 26, 2013 at 01:57:54PM +0800, Dave Young wrote:
> Old kexec-tools can not load new kernel. The reason is previously kexec-tools

The reason is, kexec-tools ... previously, thus efi failed to initialize ...

> do not fill efi_info in x86 setup header thus efi init fail and switch
> to noefi boot. In new kexec-tools it will by default fill efi_info and
> pass other efi required infomation to 2nd kernel so kexec kernel efi
> initialization will success finally.

		      succeed

> 
> To prevent from breaking userspace, add a new xloadflags bit so kexec-tools
> will check the flag and switch to old logic.
> 
> changelog:
> Matt: +&& defined(CONFIG_KEXEC)
> HPA: document the flag.
> 
> Signed-off-by: Dave Young <dyoung@...hat.com>

Other than that:

Acked-by: Borislav Petkov <bp@...e.de>

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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