From mboxrd@z Thu Jan  1 00:00:00 1970
Return-path: <kexec-bounces+dwmw2=twosheds.infradead.org@lists.infradead.org>
Received: from g4t0015.houston.hp.com ([15.201.24.18])
 by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux))
 id 1VoFdR-0001wE-Ie
 for kexec@lists.infradead.org; Wed, 04 Dec 2013 16:49:14 +0000
Message-ID: <1386175428.1791.225.camel@misato.fc.hp.com>
Subject: Re: [PATCH v4 07/12] efi: passing kexec necessary efi data via
 setup_data
From: Toshi Kani <toshi.kani@hp.com>
Date: Wed, 04 Dec 2013 09:43:48 -0700
In-Reply-To: <20131204024610.GA3764@dhcp-16-126.nay.redhat.com>
References: <1385445477-9665-1-git-send-email-dyoung@redhat.com>
 <1385445477-9665-8-git-send-email-dyoung@redhat.com>
 <20131127140732.GD32267@pd.tnic>
 <20131129091415.GH4186@dhcp-16-126.nay.redhat.com>
 <1386023600.1791.201.camel@misato.fc.hp.com>
 <1386034289.1791.210.camel@misato.fc.hp.com>
 <20131203015613.GB3980@dhcp-16-126.nay.redhat.com>
 <1386085140.1791.218.camel@misato.fc.hp.com>
 <20131204024610.GA3764@dhcp-16-126.nay.redhat.com>
Mime-Version: 1.0
List-Id: <kexec.lists.infradead.org>
List-Unsubscribe: <http://lists.infradead.org/mailman/options/kexec>,
 <mailto:kexec-request@lists.infradead.org?subject=unsubscribe>
List-Archive: <http://lists.infradead.org/pipermail/kexec/>
List-Post: <mailto:kexec@lists.infradead.org>
List-Help: <mailto:kexec-request@lists.infradead.org?subject=help>
List-Subscribe: <http://lists.infradead.org/mailman/listinfo/kexec>,
 <mailto:kexec-request@lists.infradead.org?subject=subscribe>
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Sender: "kexec" <kexec-bounces@lists.infradead.org>
Errors-To: kexec-bounces+dwmw2=twosheds.infradead.org@lists.infradead.org
To: Dave Young <dyoung@redhat.com>
Cc: mjg59@srcf.ucam.org, linux-efi@vger.kernel.org, matt@console-pimps.org, greg@kroah.com, x86@kernel.org, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, James.Bottomley@HansenPartnership.com, horms@verge.net.au, Borislav Petkov <bp@alien8.de>, ebiederm@xmission.com, hpa@zytor.com, vgoyal@redhat.com

On Wed, 2013-12-04 at 10:46 +0800, Dave Young wrote:
> 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.

Hi Dave,

The z420 firmware is based on some UEFI core that may be used by other
vendors as well.  Since this handling is totally harmless (just
redundant), I'd suggest not to have a platform check on this handling.

Thanks,
-Toshi


_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec