From mboxrd@z Thu Jan 1 00:00:00 1970 From: Haozhong Zhang Subject: Re: [RFC Design Doc] Add vNVDIMM support for Xen Date: Wed, 9 Mar 2016 20:22:59 +0800 Message-ID: <20160309122259.GA6310@hz-desktop.sh.intel.com> References: <20160218074227.GC6519@hz-desktop.sh.intel.com> <20160219021419.GB30364@localhost.localdomain> <20160301073927.GA15170@hz-desktop.sh.intel.com> <22229.57468.457255.85569@mariner.uk.xensource.com> <20160301184911.GA19728@char.us.oracle.com> <20160302071452.GB4064@hz-desktop.sh.intel.com> <56D6F2C702000078000D8509@prv-mh.provo.novell.com> <20160304022025.GA31303@hz-desktop.sh.intel.com> <20160308091519.GA6320@hz-desktop.sh.intel.com> <56DEA91202000078000DA449@prv-mh.provo.novell.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Content-Disposition: inline In-Reply-To: <56DEA91202000078000DA449@prv-mh.provo.novell.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Jan Beulich Cc: Juergen Gross , Kevin Tian , Wei Liu , Ian Campbell , Stefano Stabellini , George Dunlap , Andrew Cooper , Ian Jackson , "xen-devel@lists.xen.org" , Jun Nakajima , Xiao Guangrong , Keir Fraser List-Id: xen-devel@lists.xenproject.org T24gMDMvMDgvMTYgMDI6MjcsIEphbiBCZXVsaWNoIHdyb3RlOgo+ID4+PiBPbiAwOC4wMy4xNiBh dCAxMDoxNSwgPGhhb3pob25nLnpoYW5nQGludGVsLmNvbT4gd3JvdGU6Cj4gPiBNb3JlIHRob3Vn aHRzIG9uIHJlc2VydmluZyBOVkRJTU0gc3BhY2UgZm9yIHBlci1wYWdlIHN0cnVjdHVyZXMKPiA+ IAo+ID4gQ3VycmVudGx5LCBhIHBlci1wYWdlIHN0cnVjdCBmb3IgbWFuYWdpbmcgbWFwcGluZyBv ZiBOVkRJTU0gcGFnZXMgbWF5Cj4gPiBpbmNsdWRlIGZvbGxvd2luZyBmaWVsZHM6Cj4gPiAKPiA+ IHN0cnVjdCBudmRpbW1fcGFnZQo+ID4gewo+ID4gICAgIHVpbnQ2NF90IG1mbjsgICAgICAgIC8q IE1GTiBvZiBTUEEgb2YgdGhpcyBOVkRJTU0gcGFnZSAqLwo+ID4gICAgIHVpbnQ2NF90IGdmbjsg ICAgICAgIC8qIEdGTiB3aGVyZSB0aGlzIE5WRElNTSBwYWdlIGlzIG1hcHBlZCAqLwo+ID4gICAg IGRvbWlkX3QgIGRvbWFpbl9pZDsgIC8qIHdoaWNoIGRvbWFpbiBpcyB0aGlzIE5WRElNTSBwYWdl IG1hcHBlZCB0byAqLwo+ID4gICAgIGludCAgICAgIGlzX2Jyb2tlbjsgIC8qIElzIHRoaXMgTlZE SU1NIHBhZ2UgYnJva2VuPyAoZm9yIE1DRSkgKi8KPiA+IH0KPiA+IAo+ID4gSXRzIHNpemUgaXMg MjQgYnl0ZXMgKG9yIDIyIGJ5dGVzIGlmIHBhY2tlZCkuIEZvciBhIDIgVEIgTlZESU1NLAo+ID4g bnZkaW1tX3BhZ2Ugc3RydWN0dXJlcyB3b3VsZCBvY2N1cHkgMTIgR0Igc3BhY2UsIHdoaWNoIGlz IHRvbyBoYXJkIHRvCj4gPiBmaXQgaW4gdGhlIG5vcm1hbCByYW0gb24gYSBzbWFsbCBtZW1vcnkg aG9zdC4gSG93ZXZlciwgZm9yIHNtYWxsZXIKPiA+IE5WRElNTXMgYW5kL29yIGhvc3RzIHdpdGgg bGFyZ2UgcmFtLCB0aG9zZSBzdHJ1Y3R1cmVzIG1heSBzdGlsbCBiZSBhYmxlCj4gPiB0byBmaXQg aW4gdGhlIG5vcm1hbCByYW0uIEluIHRoZSBsYXR0ZXIgY2lyY3Vtc3RhbmNlLCBudmRpbW1fcGFn ZQo+ID4gc3RydWN0dXJlcyBhcmUgc3RvcmVkIGluIHRoZSBub3JtYWwgcmFtLCBzbyB0aGV5IGNh biBiZSBhY2Nlc3NlZCBtb3JlCj4gPiBxdWlja2x5Lgo+IAo+IE5vdCBzdXJlIGhvdyB5b3UgY2Ft ZSB0byB0aGUgYWJvdmUgc3RydWN0dXJlIC0gaXQncyB0aGUgZmlyc3QgdGltZQo+IEkgc2VlIGl0 LCB5ZXQgZmlndXJpbmcgb3V0IHdoYXQgaW5mb3JtYXRpb24gaXQgbmVlZHMgdG8gaG9sZCBpcyB3 aGF0Cj4gdGhpcyBkZXNpZ24gcHJvY2VzcyBzaG91bGQgYmUgYWJvdXQuIEZvciBleGFtcGxlLCBJ IGRvbid0IHNlZSB3aHkKPiBpdCB3b3VsZCBuZWVkIHRvIGR1cGxpY2F0ZSBNMlAgLyBQMk0gaW5m b3JtYXRpb24uIE5vciBkbyBJIHNlZSB3aHkKPiBwZXItcGFnZSBkYXRhIG5lZWRzIHRvIGhvbGQg dGhlIGFkZHJlc3Mgb2YgYSBwYWdlIChzdHJ1Y3QKPiBwYWdlX2luZm8gYWxzbyBkb2Vzbid0KS4g QW5kIHdoZXRoZXIgc3RvcmluZyBhIGRvbWFpbiBJRCAocmF0aGVyCj4gdGhhbiBhIHBvaW50ZXIg dG8gc3RydWN0IGRvbWFpbiwgYXMgaW4gc3RydWN0IHBhZ2VfaW5mbykgaXMgdGhlCj4gY29ycmVj dCB0aGluayBpcyBhbHNvIHRvIGJlIGRldGVybWluZWQgKHJhdGhlciB0aGFuIGp1c3Qgc3RhdGVk KS4KPiAKPiBPdG9oIHlvdSBtYWtlIG5vIHByb3Zpc2lvbnMgYXQgYWxsIGZvciBhbnkga2luZCBv ZiByZWYgY291bnRpbmcuCj4gV2hhdCBpZiBhIGd1ZXN0IHdhbnRzIHRvIHB1dCBwYWdlIHRhYmxl cyBpbnRvIE5WRElNTSBzcGFjZT8KPiAKPiBTaW5jZSBhbGwgb2YgeW91ciBjYWxjdWxhdGlvbnMg YXJlIGJhc2VkIHVwb24gdGhhdCBmaXhlZCBhc3N1bXB0aW9uCj4gb24gdGhlIHN0cnVjdHVyZSBs YXlvdXQsIEknbSBhZnJhaWQgdGhleSdyZSBub3QgdmVyeSBtZWFuaW5nZnVsCj4gd2l0aG91dCBm aXJzdCBzZXR0bGluZyBvbiB3aGF0IGRhdGEgbmVlZHMgdHJhY2tpbmcgaW4gdGhlIGZpcnN0IHBs YWNlLgo+IAo+IEphbgo+IAoKSSBzaG91bGQgcmVleHBsYWluIHRoZSBjaG9pY2Ugb2YgZGF0YSBz dHJ1Y3R1cmVzIGFuZCB3aGVyZSB0byBwdXQgdGhlbS4KCkZvciBoYW5kbGluZyBNQ0UgZm9yIE5W RElNTSwgd2UgbmVlZCB0byB0cmFjayBmb2xsb3dpbmcgZGF0YToKKDEpIFNQQSByYW5nZXMgb2Yg aG9zdCBOVkRJTU1zIChvbmUgcmFuZ2UgcGVyIHBtZW0gaW50ZXJsZWF2ZSBzZXQpLCB3aGljaCBh cmUKICAgIHVzZWQgdG8gY2hlY2sgd2hldGhlciBhIE1DRSBpcyBmb3IgTlZESU1NLgooMikgR0ZO IHRvIHdoaWNoIGEgTlZESU1NIHBhZ2UgaXMgbWFwcGVkLCB3aGljaCBpcyB1c2VkIHRvIGRldGVy bWluZSB0aGUKICAgIGFkZHJlc3MgcHV0IGluIHZNQ0UuCigzKSB0aGUgZG9tYWluIHRvIHdoaWNo IGEgTlZESU1NIHBhZ2UgaXMgbWFwcGVkLCB3aGljaCBpcyB1c2VkIHRvCiAgICBkZXRlcm1pbmUg d2hldGhlciBhIHZNQ0UgbmVlZHMgdG8gYmUgaW5qZWN0ZWQgYW5kIHdoZXJlIGl0IHdpbGwgYmUK ICAgIGluamVjdGVkLgooNCkgYSBmbGFnIHRvIG1hcmsgd2hldGhlciBhIE5WRElNTSBwYWdlIGlz IGJyb2tlbiwgd2hpY2ggaXMgdXNlZCB0bwogICAgYXZvaWQgbWFwcGluZyBicm9rZW4gcGFnZSB0 byBndWVzdHMuCgpGb3IgZ3JhbnRpbmcgTlZESU1NIHBhZ2VzIChlLmcuIHhlbi1ibGtiYWNrL25l dGJhY2spLAooNSkgYSByZWZlcmVuY2UgY291bnRlciBpcyBuZWVkZWQgZm9yIGVhY2ggTlZESU1N IHBhZ2UKCkFib3ZlIGRhdGEgY2FuIGJlIG9yZ2FuaXplZCBhcyBiZWxvdzoKCiogRm9yICgxKSBT UEEgcmFuZ2VzLCB3ZSBjYW4gcmVjb3JkIHRoZW0gaW4gYSBnbG9iYWwgZGF0YSBzdHJ1Y3R1cmUs CiAgZS5nLiBhIGxpc3QKCiAgICBzdHJ1Y3QgbGlzdF9oZWFkIG52ZGltbV9pc2V0X2xpc3Q7Cgog ICAgc3RydWN0IG52ZGltbV9pc2V0CiAgICB7CiAgICAgICAgIHVpbnQ2NF90ICAgICAgICAgICBi YXNlOyAgLyogc3RhcnRpbmcgU1BBIG9mIHRoaXMgaW50ZXJsZWF2ZSBzZXQgKi8KICAgICAgICAg dWludDY0X3QgICAgICAgICAgIHNpemU7ICAvKiBzaXplIG9mIHRoaXMgaW50ZXJsZWF2ZSBzZXQg Ki8KICAgICAgICAgc3RydWN0IG52ZGltbV9wYWdlICpwYWdlczsvKiBpbmZvcm1hdGlvbiBmb3Ig aW5kaXZpZHVhbCBwYWdlcyBpbiB0aGlzIGludGVybGVhdmUgc2V0ICovCiAgICAgICAgIHN0cnVj dCBsaXN0X2hlYWQgICBsaXN0OwogICAgfTsKCiogRm9yICgyKSBHRk4sIGFuIGludHVpdGl2ZSBw bGFjZSB0byBnZXQgdGhpcyBpbmZvcm1hdGlvbiBpcyBmcm9tIE0yUAogIHRhYmxlIG1hY2hpbmVf dG9fcGh5c19tYXBwaW5nW10uICBIb3dldmVyLCB0aGUgYWRkcmVzcyBvZiBOVkRJTU0gaXMKICBu b3QgcmVxdWlyZWQgdG8gYmUgY29udGlndW91cyB3aXRoIG5vcm1hbCByYW0sIHNvLCBpZiBOVkRJ TU0gc3RhcnRzCiAgZnJvbSBhbiBhZGRyZXNzIHRoYXQgaXMgbXVjaCBoaWdoZXIgdGhhbiB0aGUg ZW5kIGFkZHJlc3Mgb2Ygbm9ybWFsCiAgcmFtLCBpdCBtYXkgcmVzdWx0IGluIGEgTTJQIHRhYmxl IHRoYXQgbWF5YmUgdG9vIGxhcmdlIHRvIGZpdCBpbiB0aGUKICBub3JtYWwgcmFtLiBUaGVyZWZv cmUsIHdlIGNob29zZSB0byBub3QgcHV0IEdGTnMgb2YgTlZESU1NIGluIE0yUAogIHRhYmxlLgoK ICBBbm90aGVyIHBvc3NpYmxlIHNvbHV0aW9uIGlzIHRvIGV4dGVuZCBwYWdlX2luZm8gdG8gaW5j bHVkZSBHRk4gZm9yCiAgTlZESU1NIGFuZCB1c2UgZnJhbWVfdGFibGUuIEEgYmVuZWZpdCBvZiB0 aGlzIHNvbHV0aW9uIGlzIHRoYXQgb3RoZXIKICBkYXRhICgzKS0oNSkgY2FuIGJlIGdvdCBmcm9t IHBhZ2VfaW5mbyBhcyB3ZWxsLiBIb3dldmVyLCBkdWUgdG8gdGhlCiAgc2FtZSByZWFzb24gZm9y IG1hY2hpbmVfdG9fcGh5c19tYXBwaW5nW10gYW5kIHRoZSBjb25jZXJuIHRoYXQgdGhlCiAgbGFy Z2UgbnVtYmVyIG9mIHBhZ2VfaW5mbyBzdHJ1Y3R1cmVzIHJlcXVpcmVkIGZvciBsYXJnZSBOVkRJ TU1zIG1heQogIGNvbnN1bWUgbG90cyBvZiByYW0sIHBhZ2VfaW5mbyBhbmQgZnJhbWVfdGFibGUg c2VlbXMgbm90IGEgZ29vZCBwbGFjZQogIGVpdGhlci4KCiogQXQgdGhlIGVuZCwgd2UgY2hvb3Nl IHRvIGludHJvZHVjZSBhIG5ldyBkYXRhIHN0cnVjdHVyZSBmb3IgYWJvdmUKICBwZXItcGFnZSBk YXRhICgyKS0oNSkKCiAgICBzdHJ1Y3QgbnZkaW1tX3BhZ2UKICAgIHsKICAgICAgICBzdHJ1Y3Qg ZG9tYWluICpkb21haW47ICAgIC8qIGZvciAoMykgKi8KICAgICAgICB1aW50NjRfdCAgICAgIGdm bjsgICAgICAgIC8qIGZvciAoMikgKi8KICAgICAgICB1bnNpZ25lZCBsb25nIGNvdW50X2luZm87 IC8qIGZvciAoNCkgYW5kICg1KSwgc2FtZSBhcyBwYWdlX2luZm8tPmNvdW50X2luZm8gKi8KICAg ICAgICAvKiBvdGhlciBmaWVsZHMgaWYgbmVlZGVkLCBlLmcuIGxvY2sgKi8KICAgIH0KCiAgKE1G TiBpcyBub3QgbmVlZGVkIGluZGVlZCkKCiAgT24gZWFjaCBOVkRJTU0gaW50ZXJsZWF2ZSBzZXQs IHdlIGNvdWxkIHJlc2VydmUgYW4gYXJlYSB0byBwbGFjZSBhbgogIGFycmF5IG9mIG52ZGltbV9w YWdlIHN0cnVjdHVyZXMgZm9yIHBhZ2VzIGluIHRoYXQgaW50ZXJsZWF2ZSBzZXQuIEluCiAgYWRk aXRpb24sIHRoZSBjb3JyZXNwb25kaW5nIGdsb2JhbCBudmRpbW1faXNldCBzdHJ1Y3R1cmUgaXMg c2V0IHRvCiAgcG9pbnQgdG8gdGhpcyBhcnJheSB2aWEgaXRzICdwYWdlcycgZmllbGQuCgoqIE9u ZSBkaXNhZHZhbnRhZ2Ugb2YgYWJvdmUgc29sdXRpb24gaXMgdGhhdCBhY2Nlc3NpbmcgTlZESU1N IGlzIHNsb3dlcgogIHRoYW4gbm9ybWFsIHJhbSwgc28gc29tZSB1c2FnZSBzY2VuYXJpb3MgdGhh dCByZXF1aXJlcyBmcmVxdWVudGx5CiAgYWNjZXNzZXMgdG8gbnZkaW1tX3BhZ2Ugc3RydWN0dXJl cyBtYXkgc3VmZmVyIHBvb3IKICBwZXJmb3JtYW5jZS4gVGhlcmVmb3JlLCB3ZSBtYXkgYWRkIGEg Ym9vdCBwYXJhbWV0ZXIgdG8gYWxsb3cgdXNlcnMgdG8KICBjaG9vc2Ugbm9ybWFsIHJhbSBmb3Ig YWJvdmUgbnZkaW1tX3BhZ2UgYXJyYXlzIGlmIHRoZWlyIGhvc3RzIGhhdmUKICBwbGVudHkgcmFt LgoKICBPbmUgdGhpbmcgSSBoYXZlIG5vIGlkZWEgaXMgd2hhdCBwZXJjZW50YWdlIG9mIHJhbSB1 c2VkL3Jlc2VydmVkIGJ5CiAgWGVuIGl0c2VsZiBpcyBjb25zaWRlcmVkIGFzIGFjY2VwdGFibGUu IElmIGl0IGV4aXN0cyBhbmQgYSBib290CiAgcGFyYW1ldGVyIGlzIGdpdmVuLCB3ZSBjb3VsZCBs ZXQgWGVuIGNob29zZSB0aGUgZmFzdGVyIHJhbSB3aGVuCiAgdGhlIHBlcmNlbnRhZ2UgaGFzIG5v dCBiZWVuIHJlYWNoZWQuCgoKQW55IGNvbW1lbnRzPwoKVGhhbmtzLApIYW96aG9uZwoKX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KWGVuLWRldmVsIG1haWxp bmcgbGlzdApYZW4tZGV2ZWxAbGlzdHMueGVuLm9yZwpodHRwOi8vbGlzdHMueGVuLm9yZy94ZW4t ZGV2ZWwK