From mboxrd@z Thu Jan 1 00:00:00 1970 From: Juergen Gross Subject: Re: [PATCH v8 1/9] x86/xpti: avoid copying L4 page table contents when possible Date: Thu, 19 Apr 2018 09:44:40 +0200 Message-ID: <58b2d6ba-381d-4f4e-e0bb-bf6281ba6ac6@suse.com> References: <20180418083051.8334-1-jgross@suse.com> <20180418083051.8334-2-jgross@suse.com> <5AD76E5A02000078001BC770@suse.com> <35756e6c-dc79-f0a1-df31-bca0495e3352@suse.com> <5AD847BD02000078001BC8D9@suse.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from us1-rack-dfw2.inumbo.com ([104.130.134.6]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1f94FL-0003F5-He for xen-devel@lists.xenproject.org; Thu, 19 Apr 2018 07:44:47 +0000 In-Reply-To: <5AD847BD02000078001BC8D9@suse.com> Content-Language: de-DE List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: Jan Beulich , Tim Deegan Cc: Andrew Cooper , xen-devel List-Id: xen-devel@lists.xenproject.org T24gMTkvMDQvMTggMDk6MzksIEphbiBCZXVsaWNoIHdyb3RlOgo+Pj4+IE9uIDE5LjA0LjE4IGF0 IDA4OjE5LCA8amdyb3NzQHN1c2UuY29tPiB3cm90ZToKPj4gT24gMTgvMDQvMTggMTg6MTIsIEph biBCZXVsaWNoIHdyb3RlOgo+Pj4+Pj4gT24gMTguMDQuMTggYXQgMTA6MzAsIDxqZ3Jvc3NAc3Vz ZS5jb20+IHdyb3RlOgo+Pj4+IEBAIC0xNjAsNSArMTYxLDIwIEBAIHVuc2lnbmVkIGludCBmbHVz aF9hcmVhX2xvY2FsKGNvbnN0IHZvaWQgKnZhLCB1bnNpZ25lZCBpbnQgZmxhZ3MpCj4+Pj4gIAo+ Pj4+ICAgICAgbG9jYWxfaXJxX3Jlc3RvcmUoaXJxZmwpOwo+Pj4+ICAKPj4+PiArICAgIGlmICgg ZmxhZ3MgJiBGTFVTSF9ST09UX1BHVEJMICkKPj4+PiArICAgICAgICBnZXRfY3B1X2luZm8oKS0+ cm9vdF9wZ3RfY2hhbmdlZCA9IHRydWU7Cj4+Pj4gKwo+Pj4+ICAgICAgcmV0dXJuIGZsYWdzOwo+ Pj4+ICB9Cj4+Pj4gKwo+Pj4+ICt2b2lkIGZsdXNoX3Jvb3RfcGd0X21hc2soY3B1bWFza190ICpt YXNrKQo+Pj4KPj4+IGNvbnN0Cj4+Pgo+Pj4+ICt7Cj4+Pj4gKyAgICBpbnQgY3B1Owo+Pj4KPj4+ IHVuc2lnbmVkIGludAo+Pj4KPj4+PiArICAgIHN0cnVjdCBjcHVfaW5mbyAqY3B1X2luZm87Cj4+ Pgo+Pj4gRGVjbGFyYXRpb24gaW4gbW9zdCBuYXJyb3cgcG9zc2libGUgc2NvcGUgcGxlYXNlLgo+ Pj4KPj4+PiArICAgIGZvcl9lYWNoX2NwdShjcHUsIG1hc2spCj4+Pj4gKyAgICB7Cj4+Pj4gKyAg ICAgICAgY3B1X2luZm8gPSAoc3RydWN0IGNwdV9pbmZvICopKHN0YWNrX2Jhc2VbY3B1XSArIFNU QUNLX1NJWkUpIC0gMTsKPj4+PiArICAgICAgICBjcHVfaW5mby0+cm9vdF9wZ3RfY2hhbmdlZCA9 IHRydWU7Cj4+Pj4gKyAgICB9Cj4+Pj4gK30KPj4+Cj4+PiBTbyB3aHkgaXMgdGhpcyBub3Qgc2Vu ZGluZyBhbiBJUEkgdG8gdHJpZ2dlciB0aGUgRkxVU0hfUk9PVF9QR1RCTCBwcm9jZXNzaW5nCj4+ PiB2aXNpYmxlIGFib3ZlPwo+Pgo+PiBJdCBpcyBub3QgbmVlZGVkIGZvciB0aGUgY2FzZSB0aGlz IGZ1bmN0aW9uIHdhcyBpbnRyb2R1Y2VkLiBNYXliZSBJCj4+IHNob3VsZCByZW5hbWUgaXQgdG8g Zmx1c2hfcm9vdF9wZ3RfbWFza19sYXp5KCkgPwo+Pgo+Pj4gRXNwZWNpYWxseSB0aGUgY2FzdCB5 b3UgbmVlZCBoZXJlIGxvb2tzIHF1aXRlIHVuZGVzaXJhYmxlLgo+Pgo+PiBJbiBnZXRfY3B1X2lu Zm8oKSBpdCBpcyBkb25lIHRoZSBzYW1lIHdheS4gSSBjYW4gYWRkIGEgY29tbW9uIGhlbHBlcgo+ PiBmdW5jdGlvbiB0byBjdXJyZW50LmgKPiAKPiBXaGlsZSBhaXVpIG1vb3Qgd2l0aCB0aGUgYmVs b3csIGEgY29tbW9uIGhlbHBlciB3b3VsZCBpbmRlZWQgYmUgdGhlCj4gd2F5IHRvIGdvIGlmIHdl IHJlYWxseSBuZWVkZWQgc3VjaCBhIGNyb3NzLUNQVSBhY2Nlc3MuCj4gCj4+PiBQbHVzIEkKPj4+ IHRoaW5rIHRoaXMgaXMgcmFjeSAoZXZlbiBpZiBxdWl0ZSB1bmxpa2VseSB0byB0cmlnZ2VyKSB3 aXRoIGEgQ1BVIGJlaW5nIGJyb3VnaHQgZG93bjoKPj4+IFdoYXQgaWYgc3RhY2tfYmFzZVtjcHVd IGJlY29tZXMgTlVMTCBhZnRlciB5b3UndmUgZm91bmQgdGhlIHJlc3BlY3RpdmUgYml0IGluCj4+ PiBtYXNrIHNldC4gRXNwZWNpYWxseSB3aGVuIFhlbiBydW5zIGl0c2VsZiB2aXJ0dWFsaXplZCwg KGFsbW9zdCkgYXJiaXRyYXJpbHkgbG9uZwo+Pj4gcGVyaW9kcyBvZiB0aW1lIG1heSBwYXNzIGJl dHdlZW4gYW55IHR3byBpbnN0cnVjdGlvbnMuCj4+Cj4+IFJpZ2h0Lgo+Pgo+PiBTbyBlaXRoZXIg SSdtIGFkZGluZyBzb21lIGtpbmQgb2YgbG9ja2luZy9yY3UsIG9yIEknbSBzd2l0Y2hpbmcgdG8g dXNlCj4+IElQSXMgYW5kIGFjY2VzcyByb290X3BndF9jaGFuZ2VkIG9ubHkgbG9jYWxseS4KPj4K Pj4gRG8geW91IGhhdmUgYW55IHByZWZlcmVuY2U/Cj4gCj4gU2luY2UgaXNzdWluZyBhbiBJUEkg aXMganVzdCBhIHNpbmdsZSBjYWxsLCBJJ2QgcHJlZmVyIG5vdCB0byBoYXZlIG5ldyAobG9ja2lu ZywKPiByY3UsIG9yIHdoYXRldmVyIGVsc2UpIGxvZ2ljIGFkZGVkIGhlcmUuIFVubGVzcyBvZiBj b3Vyc2Ugc29tZW9uZSwgaW4KPiBwYXJ0aWN1bGFyIFRpbSwgdGhpbmtzIHNlbmRpbmcgYW4gSVBJ IGhlcmUgaXMgYSByYXRoZXIgYmFkIGlkZWEuCgpPa2F5LgoKQW5vdGhlciBhbHRlcm5hdGl2ZSB3 b3VsZCBiZSB0byBwYXNzIGFub3RoZXIgZmxhZyB0byB0aGUgY2FsbGVycyB0bwpzaWduYWwgdGhl IG5lZWQgZm9yIGEgZmx1c2guIFRoaXMgd291bGQgcmVxdWlyZSBxdWl0ZSBzb21lIG1vZGlmaWNh dGlvbnMKdG8gc2hhZG93IGNvZGUgSSdkIGxpa2UgdG8gYXZvaWQsIHRob3VnaC4gT1RPSCB0aGlz IHdheSB3ZSBjb3VsZCBjb21iaW5lCmZsdXNoaW5nIHRoZSB0bGIgYW5kIHRoZSByb290IHBhZ2Ug dGFibGVzLiBUaW0sIGFueSBwcmVmZXJlbmNlcz8KCgpKdWVyZ2VuCgoKX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KWGVuLWRldmVsIG1haWxpbmcgbGlzdApY ZW4tZGV2ZWxAbGlzdHMueGVucHJvamVjdC5vcmcKaHR0cHM6Ly9saXN0cy54ZW5wcm9qZWN0Lm9y Zy9tYWlsbWFuL2xpc3RpbmZvL3hlbi1kZXZlbA==