linux-kernel - Re: [PATCH 12/12] EFI: Runtime services virtual mapping

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Message-ID: <20131023131113.GA16432@nazgul.tnic>
Date:	Wed, 23 Oct 2013 15:11:13 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Dave Young <dyoung@...hat.com>
Cc:	Matt Fleming <matt@...sole-pimps.org>, X86 ML <x86@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Borislav Petkov <bp@...e.de>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	James Bottomley <James.Bottomley@...senPartnership.com>,
	Vivek Goyal <vgoyal@...hat.com>, linux-efi@...r.kernel.org,
	fwts-devel@...ts.ubuntu.com
Subject: Re: [PATCH 12/12] EFI: Runtime services virtual mapping

On Wed, Oct 23, 2013 at 08:51:31PM +0800, Dave Young wrote:
> In kexed 2nd kernel, phys_start_b need to be mapped to virt_start_b
> Simply use efi_map_region from your patch does not work because it
> will map phys_start_b to a different virt address, isn't it?

Oh ok, in the second kernel we're not mapping *all* regions we do map in
the first kernel, right.

> So I need simply map according to the kexec passed in mapping addr.

Yes, thanks for elaborating.
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