linux-kernel - Re: [PATCH -v2] EFI: Runtime services virtual mapping

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Date:	Mon, 30 Sep 2013 16:46:42 -0400
From:	Vivek Goyal <vgoyal@...hat.com>
To:	Borislav Petkov <bp@...en8.de>
Cc:	"H. Peter Anvin" <hpa@...or.com>, Dave Young <dyoung@...hat.com>,
	X86 ML <x86@...nel.org>, LKML <linux-kernel@...r.kernel.org>,
	Borislav Petkov <bp@...e.de>,
	Matt Fleming <matt@...sole-pimps.org>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	James Bottomley <james.bottomley@...senpartnership.com>,
	linux-efi@...r.kernel.org
Subject: Re: [PATCH -v2] EFI: Runtime services virtual mapping

On Mon, Sep 30, 2013 at 10:41:54PM +0200, Borislav Petkov wrote:

[..]
> hpa, so, for the struct efi_mapping thing to work, I will have to grep
> dmesg of the first kernel to get an output like the one below, filter
> the runtime regions so that I can build the struct efi_mapping array of
> mem regions which I pass on to the second, kexec kernel with setup_data.

Any data you need to pass to second kernel will have to be exported to
user space either using /sys or /proc so that kexec-tools can parse it.

Thanks
Vivek
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