linux-kernel - Re: [PATCH v4 07/12] efi: passing kexec necessary efi data via setup

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Message-ID: <20131204024610.GA3764@dhcp-16-126.nay.redhat.com>
Date:	Wed, 4 Dec 2013 10:46:10 +0800
From:	Dave Young <dyoung@...hat.com>
To:	Toshi Kani <toshi.kani@...com>
Cc:	Borislav Petkov <bp@...en8.de>, 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
Subject: Re: [PATCH v4 07/12] efi: passing kexec necessary efi data via
 setup_data

Hi, Toshi

> Oh, I think I now understand what the issue was.  The z420 firmware
> updates the SMBIOS table address in the EFI system table to a virtual
> address after calling EFI SetVirtualAddressMap.  So, you are passing the
> original physical address of the SMBIOS table from the 1st kernel to the
> 2nd kernel to put it back to physical.  Is that right? 

Right.

Thanks
Dave
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