From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Jan Beulich" Subject: Re: [PATCH v3 1/6] x86: NOP out XPTI entry/exit code when it's not in use Date: Fri, 16 Mar 2018 03:46:40 -0600 Message-ID: <5AABA09002000078001B29C7@prv-mh.provo.novell.com> References: <5AA7E24402000078001B0F41@prv-mh.provo.novell.com> <5AA7E49502000078001B0F50@prv-mh.provo.novell.com> <0be1a848-0526-749e-2e04-0abc493e93ed@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from all-amaz-eas1.inumbo.com ([34.197.232.57]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1ewlwo-0002CI-Va for xen-devel@lists.xenproject.org; Fri, 16 Mar 2018 09:46:51 +0000 In-Reply-To: <0be1a848-0526-749e-2e04-0abc493e93ed@citrix.com> Content-Disposition: inline List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: Andrew Cooper Cc: Juergen Gross , xen-devel List-Id: xen-devel@lists.xenproject.org Pj4+IE9uIDE1LjAzLjE4IGF0IDIwOjQ0LCA8YW5kcmV3LmNvb3BlcjNAY2l0cml4LmNvbT4gd3Jv dGU6Cj4gT24gMTMvMDMvMTggMTM6NDcsIEphbiBCZXVsaWNoIHdyb3RlOgo+PiBJbnRyb2R1Y2Ug YSBzeW50aGV0aWMgZmVhdHVyZSBmbGFnIHRvIHVzZSBhbHRlcm5hdGl2ZSBpbnN0cnVjdGlvbgo+ PiBwYXRjaGluZyB0byBOT1Agb3V0IGFsbCBjb2RlIG9uIGVudHJ5L2V4aXQgcGF0aHMuIEhhdmlu ZyBOT1BzIGhlcmUgaXMKPj4gZ2VuZXJhbGx5IGJldHRlciB0aGFuIHVzaW5nIGNvbmRpdGlvbmFs IGJyYW5jaGVzLgo+Pgo+PiBBbHNvIGNoYW5nZSB0aGUgbGltaXQgb24gdGhlIG51bWJlciBvZiBi eXRlcyB3ZSBjYW4gcGF0Y2ggaW4gb25lIGdvIHRvCj4+IHRoYXQgcmVzdWx0aW5nIGZyb20gdGhl IGVuY29kaW5nIGluIHN0cnVjdCBhbHRfaW5zdHIgLSB0aGVyZSdzIG5vIHBvaW50Cj4+IHJlZHVj aW5nIGl0IGJlbG93IHRoYXQgbGltaXQsIGFuZCB3aXRob3V0IGEgY2hlY2sgYmVpbmcgaW4gcGxh Y2UgdGhhdAo+PiB0aGUgbGltaXQgaXNuJ3QgYWN0dWFsbHkgZXhjZWVkZWQsIHN1Y2ggYW4gYXJ0 aWZpY2lhbCBib3VuZGFyeSBpcyBhCj4+IGxhdGVudCByaXNrLgo+Pgo+PiBTaWduZWQtb2ZmLWJ5 OiBKYW4gQmV1bGljaCA8amJldWxpY2hAc3VzZS5jb20+Cj4+IFRlc3RlZC1ieTogSnVlcmdlbiBH cm9zcyA8amdyb3NzQHN1c2UuY29tPgo+PiBSZXZpZXdlZC1ieTogSnVlcmdlbiBHcm9zcyA8amdy b3NzQHN1c2UuY29tPgo+IAo+IEknbSBhZnJhaWQgdGhhdCBJIHN0aWxsIGhhdmUgbWlzZ2l2aW5n cyBhYm91dCB0aGlzIHBhdGNoLgo+IAo+IFdoaWxlIEknbSBxdWl0ZSB3aWxsaW5nIHRvIHRydXN0 IHRoYXQgaXQgZnVuY3Rpb25zIGNvcnJlY3RseSwgaXQgaXMKPiB0YWtpbmcgYSBzb21lIGNvZGUg d2hpY2ggaXMgYWxtb3N0IGltcG9zc2libGUgdG8gZm9sbG93IGFscmVhZHksIGFuZAo+IG1ha2lu ZyBpdCBzdWJzdGFudGlhbGx5IG1vcmUgY29tcGxpY2F0ZWQgdG8gZm9sbG93LCBmb3Igd2hhdCBh cHBlYXJzIHRvCj4gYmUgYSBmcmFjdGlvbmFsIGdhaW4uCj4gCj4gVGhlIHR3byBkaXN0aW5jdCBh cmVhcyBvZiBjb25jZXJuIGFyZSB0aGUgc3BsaXQgaW50ZXJydXB0IHJlLWVuYWJsZW1lbnQKPiAo d2hpY2ggcmVhbGx5IGRvZXNuJ3QgYnV5IHVzIGFueXRoaW5nIHVzZWZ1bCksCgpXaGlsZSBJIHRo aW5rIGl0IGlzIHRoZSBjb3JyZWN0IHRoaW5nIHRvIGRvIChyZXN0b3JlIGFzIG11Y2ggb3JpZ2lu YWwKYmVoYXZpb3IgYXMgcG9zc2libGUpLCBJJ20gd2lsbGluZyB0byBnaXZlIHVwIG9uIHRoaXMg b3Igc3BsaXQgb2ZmCnRob3NlIGNoYW5nZXMgdG8gYSBzZXBhcmF0ZSBwYXRjaC4gKEkgbm93IGFs c28gcmVhbGl6ZSBJJ3ZlIGNvZGVkCnRoaXMgaW4gYSBtb3JlIGNvbXBsaWNhdGVkIHRoYW4gbmVj ZXNzYXJ5IGZvcm0gLSB0aGVyZSdzIG5vIG5lZWQKdG8gdXNlIEFMVEVSTkFUSVZFX05PUCBpbiB0 aG9zZSBjYXNlcywgcGxhaW4gQUxURVJOQVRJVkUgd2lsbCBkby4pCgo+IGFuZCBob3cgb2J2aW91 cyB0aGUKPiBub3BwaW5nIGlzICh3aGVyZSBpbiB0aGUgLkx4Y3B0X2NyM19zdGFydCBjYXNlLCB0 aGUgQUxURVJOQVRJVkVfTk9QIGlzCj4gMTExIGxpbmVzICghKSBhd2F5IGZyb20gdGhlIGNvZGUg aXQgYXBwbGllcyB0bykuCgpXZWxsLCB0aGVyZSdzIG5vIGFsdGVybmF0aXZlIHRvIHRoaXMgd2hl biB3ZSB3YW50IHRvIE5PUCBvdXQgYWxsCnJlc3BlY3RpdmUgY29kZS4gVGhhdCdzIGJlY2F1c2Ug dGhlIHBhdGNoaW5nIG5lZWRzIHRvIGJlIGRvbmUKaW4gYSBjZXJ0YWluIHNlcXVlbmNlIGluIG9y ZGVyIHRvIGJlIHNhZmUuCgpIb3dldmVyLCB3ZSBjb3VsZCBkZWNpZGUgdG8gbm90IE5PUCBvdXQg dGhlIChJIHRoaW5rKSA0IGluc3RhbmNlcwpvZiByZXN0b3JpbmcgeGVuX2NyMywgb24gdGhlIGJh c2lzIHRoYXQgJXIxNSBpcyB6ZXJvIHdpdGggdGhlIG90aGVyCmNvZGUgTk9QZWQgb3V0LiBUaGF0 IHdvdWxkIGFsbG93IG1vdmluZyB0aGUgQUxURVJOQVRJVkVfTk9QCmluc3RhbmNlcyByaWdodCB0 byB3aGVyZSB0aGV5IGFwcGx5LgoKSmFuCgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX18KWGVuLWRldmVsIG1haWxpbmcgbGlzdApYZW4tZGV2ZWxAbGlzdHMu eGVucHJvamVjdC5vcmcKaHR0cHM6Ly9saXN0cy54ZW5wcm9qZWN0Lm9yZy9tYWlsbWFuL2xpc3Rp bmZvL3hlbi1kZXZlbA==