From mboxrd@z Thu Jan 1 00:00:00 1970 From: Konrad Rzeszutek Wilk Subject: Re: xen/xen vs xen/kvm nesting with pv drivers Date: Tue, 6 Sep 2016 11:40:10 -0400 Message-ID: <20160906154010.GA28840@char.us.oracle.com> References: <21926294.38.1473166034486.JavaMail.root@zimbra.overnetdata.com> <8beb1018-5b07-7e06-3d13-c27d5ce2a7fe@citrix.com> <458a596f-4a9f-be51-f4f6-eedc9b810bf3@overnetdata.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Content-Disposition: inline In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Andrew Cooper Cc: andrew.thomas@oracle.com, Anthony Wright , xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org T24gVHVlLCBTZXAgMDYsIDIwMTYgYXQgMDM6MzY6MjhQTSArMDEwMCwgQW5kcmV3IENvb3BlciB3 cm90ZToKPiBPbiAwNi8wOS8xNiAxNDozMiwgQW50aG9ueSBXcmlnaHQgd3JvdGU6Cj4gPiBPbiAw Ni8wOS8yMDE2IDE0OjA1LCBBbmRyZXcgQ29vcGVyIHdyb3RlOgo+ID4+IE9uIDA2LzA5LzE2IDEz OjQ3LCBBbnRob255IFdyaWdodCB3cm90ZToKPiA+Pj4gSSB0cmllZCB0byBpbnN0YWxsIFhlbiAo NC43LjAgd2l0aCBsaW51eCA0LjcuMiBEb20wKSBvbiBhbiBBV1MgdmlydHVhbCBtYWNoaW5lIGFu ZCBpdCBmYWlsZWQgYmVjYXVzZSB3aGlsZSBBV1MgdXNlcyBYZW4gaXQgcmVxdWlyZXMgdGhhdCB5 b3UgdXNlIHRoZSBQVkhWTSBuZXR3b3JrIGRyaXZlci4gSSB0aGVuIHRyaWVkIHRvIGluc3RhbGwg WGVuIG9uIGEgR29vZ2xlIENsb3VkIHZpcnR1YWwgbWFjaGluZSBhbmQgZGVzcGl0ZSBhbHNvIHJl cXVpcmluZyB5b3UgdG8gdXNlIFBWIGRyaXZlcnMsIHRoYXQgc3VjY2VlZGVkIGJlY2F1c2UgR29v Z2xlIENsb3VkIHVzZXMgS1ZNLgo+ID4+Pgo+ID4+PiBJIHRoaW5rIHRoaXMgbWVhbnMgdGhhdCBp ZiB5b3UgbmVzdCBYZW4gaW4gS1ZNIHlvdSBjYW4gdXNlIGhpZ2ggcGVyZm9ybWFuY2UgZHJpdmVy cywgYnV0IGlmIHlvdSBuZXN0IFhlbiBpbiBYZW4geW91IGhhdmUgdG8gdXNlIHNsb3dlciBkcml2 ZXJzLCB3aGljaCBzZWVtcyB0byBiZSB0aGUgd3Jvbmcgd2F5IGFyb3VuZCEKPiA+Pj4KPiA+Pj4g SSdkIGxpa2UgdG8gYmUgYWJsZSB0byBpbnN0YWxsIFhlbiBvbiBhbiBBV1MgdmlydHVhbCBtYWNo aW5lLCBhbmQgd29uZGVyZWQgd2hhdCBhcmUgdGhlIGNoYWxsZW5nZXMgdG8gZ2V0dGluZyB0aGUg cHYgZHJpdmVycyB3b3JraW5nIGluIGEgbmVzdGVkIGVudmlyb25tZW50LiBJcyB0aGlzIGEgcHJv YmxlbSB3aXRoIHRoZSBEb20wIGtlcm5lbCBvbmx5IGV4cGVjdGluZyB0aGVyZSB0byBiZSBhIHNp bmdsZSBYZW5TdG9yZSwgb3IgaXMgdGhlcmUgYWxzbyBhIHByb2JsZW0gaW4gWGVuPwo+ID4+IE5l c3RpbmcgWGVuIGluc2lkZSBYZW4gYW5kIGdldHRpbmcgaGlnaC1zcGVlZCBkcml2ZXJzIGF0IEwx IGlzIGEgaGFyZAo+ID4+IHByb2JsZW0sIHdoaWNoIGlzIHdoeSBub29uZSBoYXMgdGFja2xlZCBp dCB5ZXQuCj4gPj4KPiA+PiBUaGUgcHJvYmxlbXMgYWxsIHJldm9sdmUgYXJvdW5kIEwxJ3MgZG9t MC4gIEl0IGNhbid0IGlzc3VlIGh5cGVyY2FsbHMgdG8KPiA+PiBMMCwgbWVhbmluZyB0aGF0IGl0 IGNhbnQgZmluZCBvciBjb25uZWN0IHRoZSB4ZW5zdG9yZSByaW5nLiAgRXZlbiBpZiBpdAo+ID4+ IGNvdWxkLCB0aGVyZSBpcyB0aGUgcHJvYmxlbSBvZiBtdWx0aXBsZSB4ZW5zdG9yZXMsIHdoaWNo IGRvZXNuJ3QgZml0IGluCj4gPj4gdGhlIGN1cnJlbnQgYXJjaGl0ZWN0dXJlLgo+ID4+Cj4gPj4g SXQgd291bGQgYmUgbG92ZWx5IGlmIHNvbWVvbmUgd291bGQgd29yayBvbiB0aGlzLCBidXQgaXQg aXMgYSB2ZXJ5IGxhcmdlCj4gPj4gc3dhbXAuCj4gPj4KPiA+PiB+QW5kcmV3Cj4gPiBEb2VzIHRo ZSBMMSdzIERvbTAgaGF2ZSB0byBpc3N1ZSB0aGUgaHlwZXJjYWxscyBkaXJlY3RseT8gV291bGQg aXQgYmUKPiA+IHBvc3NpYmxlIHRvIGdldCB0aGUgTDEncyBEb20wIHRvIGlzc3VlIHRoZSByZXF1 ZXN0IHRvIHRoZSBMMSBoeXBlcnZpc29yCj4gPiBhbmQgdGhhdCB0byBjYWxsIHRoZSBMMCBoeXBl cnZpc29yPyBUaGlzIHdvdWxkIHNlZW0gdG8gZml0IHRoZSBjdXJyZW50Cj4gPiBhcmNoaXRlY3R1 cmUgZmFpcmx5IGNsb3NlbHkuIChTb3JyeSBpZiBJJ3ZlIGdvdCB0aGUgdGVybWlub2xvZ3kgd3Jv bmcpCj4gCj4gSW4gcHJpbmNpcGxlLCBMMSBYZW4gY291bGQgcHJveHkgaHlwZXJjYWxscyBmcm9t IEwxIGRvbTAgdG8gTDAgWGVuLgo+IAo+IEhvd2V2ZXIsIGV2ZW50IGNoYW5uZWxzIGFuZCBncmFu dCBtYXBzIGFmZmVjdCB0aGUgZnVsbCBMMSBndWVzdCBwaHlzaWNhbAo+IHNwYWNlLCBhbmQgbmVl ZCB0byBiZSBtYW5hZ2VkIGJ5IHRoZSBMMSBYZW4sIG5vdCB0aGUgTDEgZG9tMC4gIEF0IHRoYXQK PiBwb2ludCwgeW91IGFyZSB0YWxraW5nIGFib3V0IHByb3h5aW5nIHRoZSBldmVudC9ncmFudCBp bnRlcmZhY2UsIGJ1dCBhcwo+IFhlbiB0cmllcyB0byBzcGVjaWZpY2FsbHkgc3RheSBvdXQgb2Yg dGhlIHdheSBvZiBkaXNrL25ldHdvcmsgaW4gZG9tMCwKPiBpdCBpc24ndCBvYnZpb3VzIHdoZXJl IHRoZSBzcGxpdCBsaXZlcy4KPiAKPiA+Cj4gPiBSZWdhcmRpbmcgbXVsdGlwbGUgWGVuU3RvcmVz LCBJIGFwcHJlY2lhdGUgdGhlcmUgd291bGQgYmUgc2lnbmlmaWNhbnQKPiA+IHByb2JsZW1zLCBi dXQgeW91J2Qgb25seSBoYXZlIGEgbWF4aW11bSBvZiB0d28gWGVuU3RvcmVzLCBvbmUgZm9yIHRo ZQo+ID4geGVuYmFjayBkcml2ZXJzICh0aGUgY3VycmVudCBYZW5TdG9yZSkgYW5kIG9uZSBmb3Ig dGhlIHhlbmZyb250IGRyaXZlcnMKPiA+ICh0aGF0IHRhbGtzIHRvIHRoZSBwYXJlbnQgaHlwZXJ2 aXNvcikuCj4gCj4gVW50aWwgdGhpcyBwb2ludCwgZXZlbnQgY2hhbm5lbHMsIGdyYW50IG1hcHMg YW5kIHhlbnN0b3JlIGhhdmUgYmVlbgo+IGdsb2JhbCBwZXItZG9tYWluIHdpdGggbm8gY29uY2Vw dCBvZiBzZXBhcmF0ZSBuYW1lc3BhY2VzLiAgQXMgYSByZXN1bHQsCj4gY2hhbmdpbmcgdGhlIGV4 aXN0aW5nIGNvZGUgdG8gd29yayBpbiBhIG5lc3RlZCB3YXkgd2lsbCBiZSB2ZXJ5IGludmFzaXZl Lgo+IAo+IAo+IEZ1bmRhbWVudGFsbHksIHRoZSBwcm9ibGVtIGlzIHRoYXQgWGVuJ3MgdmlydHVh bCBhcmNoaXRlY3R1cmUgZG9lcyBub3QKPiBuZXN0IGNsZWFubHkuICBUaGlzIGlzIGVhc3kgdG8g aWRlbnRpZnkgaW4gaGluZHNpZ2h0LCBidXQgYWJvdXQgMTUgeWVhcnMKPiB0b28gbGF0ZSB0byBh Y3QgdXBvbi4gIEkgZG9uJ3QgaGF2ZSBhbnkgZ29vZCBzdWdnZXN0aW9ucywgc2hvcnQgb2YKPiBz b21ldGhpbmcgcmFkaWNhbCBsaWtlIHVzaW5nIHZpcnRpby4KClRoZXJlIHdhcyBhbiBwYXBlciBh bG9uZyB3aXRoIGFuIFJGQyBpbXBsZW1lbnRpb24gb2YgUFYgZHJpdmVycyBpbgpuZXN0ZWQgZG9t MC4gQ0NpbmcgYSBjby13b3JrZXIgd2hvIG1heSByZW1lbWJlciBpdCBiZXR0ZXIgdGhhbiBtZS4K Cj4gCj4gfkFuZHJldwo+IAo+IF9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fCj4gWGVuLWRldmVsIG1haWxpbmcgbGlzdAo+IFhlbi1kZXZlbEBsaXN0cy54ZW4u b3JnCj4gaHR0cHM6Ly9saXN0cy54ZW4ub3JnL3hlbi1kZXZlbAoKX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX18KWGVuLWRldmVsIG1haWxpbmcgbGlzdApYZW4t ZGV2ZWxAbGlzdHMueGVuLm9yZwpodHRwczovL2xpc3RzLnhlbi5vcmcveGVuLWRldmVsCg==