From mboxrd@z Thu Jan  1 00:00:00 1970
From: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Subject: Re: [PATCH 4/4] hvmloader: add support to load extra
 ACPI tables from qemu
Date: Thu, 21 Jan 2016 17:10:50 +0800
Message-ID: <56A0A09A.2050101@linux.intel.com>
References: <1451388711-18646-1-git-send-email-haozhong.zhang@intel.com>
	<1451388711-18646-5-git-send-email-haozhong.zhang@intel.com>
	<5699362402000078000C7803@prv-mh.provo.novell.com>
	<20160118005255.GC3528@hz-desktop.sh.intel.com>
	<569CB47502000078000C7CFB@prv-mh.provo.novell.com>
	<20160120053132.GA5005@hz-desktop.sh.intel.com>
	<569F575902000078000C8EDC@prv-mh.provo.novell.com>
	<20160120110449.GD4939@hz-desktop.sh.intel.com>
	<569F7B8302000078000C8FF8@prv-mh.provo.novell.com>
	<569FA7F3.8080506@linux.intel.com>
	<569FCCED02000078000C94BA@prv-mh.provo.novell.com>
	<569FC112.9060309@linux.intel.com>
	<56A0A25002000078000C971B@prv-mh.provo.novell.com>
	<56A095E3.5060507@linux.intel.com>
	<56A0AA8A02000078000C977D@prv-mh.provo.novell.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"; Format="flowed"
Content-Transfer-Encoding: 7bit
Return-path: <xen-devel-bounces@lists.xen.org>
In-Reply-To: <56A0AA8A02000078000C977D@prv-mh.provo.novell.com>
List-Unsubscribe: <http://lists.xen.org/cgi-bin/mailman/options/xen-devel>,
	<mailto:xen-devel-request@lists.xen.org?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xen.org>
List-Help: <mailto:xen-devel-request@lists.xen.org?subject=help>
List-Subscribe: <http://lists.xen.org/cgi-bin/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xen.org?subject=subscribe>
Sender: xen-devel-bounces@lists.xen.org
Errors-To: xen-devel-bounces@lists.xen.org
To: Jan Beulich <JBeulich@suse.com>
Cc: Haozhong Zhang <haozhong.zhang@intel.com>, Kevin Tian <kevin.tian@intel.com>, Wei Liu <wei.liu2@citrix.com>, Ian Campbell <ian.campbell@citrix.com>, Stefano Stabellini <stefano.stabellini@eu.citrix.com>, Andrew Cooper <andrew.cooper3@citrix.com>, Ian Jackson <ian.jackson@eu.citrix.com>, xen-devel@lists.xen.org, Jun Nakajima <jun.nakajima@intel.com>, Keir Fraser <keir@xen.org>
List-Id: xen-devel@lists.xenproject.org



On 01/21/2016 04:53 PM, Jan Beulich wrote:
>>>> On 21.01.16 at 09:25, <guangrong.xiao@linux.intel.com> wrote:
>> On 01/21/2016 04:18 PM, Jan Beulich wrote:
>>> Yes. But then - other than you said above - it still looks to me as
>>> if the split between PMEM and PBLK is arranged for by firmware?
>>
>> Yes. But OS/Hypervisor is not excepted to dynamically change its configure
>> (re-split),
>> i,e, for PoV of OS/Hypervisor, it is static.
>
> Exactly, that has been my understanding. And hence the PMEM part
> could be under the hypervisor's control, while the PBLK part could be
> Dom0's responsibility.
>

I am not sure if i have understood your point. What your suggestion is that
leave PMEM for hypervisor and all other parts (PBLK and _DSM handling) to
Dom0? If yes, we should:
a) handle hotplug in hypervisor (new PMEM add/remove) that causes hyperivsor
    interpret ACPI SSDT/DSDT.
b) some _DSMs control PMEM so you should filter out these kind of _DSMs and
    handle them in hypervisor.
c) hypervisor should mange PMEM resource pool and partition it to multiple
    VMs.