From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Jan Beulich" Subject: Re: [PATCH RFC] x86/emulate: implement hvmemul_cmpxchg() with an actual CMPXCHG Date: Thu, 30 Mar 2017 06:05:49 -0600 Message-ID: <58DD10BD020000780014AA0E@prv-mh.provo.novell.com> References: <1490361899-18303-1-git-send-email-rcojocaru@bitdefender.com> <58DA510A0200007800148F6F@prv-mh.provo.novell.com> <925827a5-b346-1733-3c0a-64eaa7b3e251@bitdefender.com> <58DA5B7E020000780014900C@prv-mh.provo.novell.com> <58DBD8FF020000780014A113@prv-mh.provo.novell.com> <185bbccb-0156-07fe-d060-6135cae07caf@bitdefender.com> <3e753894-4727-5d4f-1ced-9be09c035e2f@bitdefender.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <3e753894-4727-5d4f-1ced-9be09c035e2f@bitdefender.com> Content-Disposition: inline List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Razvan Cojocaru Cc: andrew.cooper3@citrix.com, paul.durrant@citrix.com, Tim Deegan , xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org Pj4+IE9uIDI5LjAzLjE3IGF0IDE3OjQ5LCA8cmNvam9jYXJ1QGJpdGRlZmVuZGVyLmNvbT4gd3Jv dGU6Cj4gT24gMDMvMjkvMjAxNyAwNjowNCBQTSwgUmF6dmFuIENvam9jYXJ1IHdyb3RlOgo+PiBP biAwMy8yOS8yMDE3IDA1OjAwIFBNLCBSYXp2YW4gQ29qb2NhcnUgd3JvdGU6Cj4+PiBPbiAwMy8y OS8yMDE3IDA0OjU1IFBNLCBKYW4gQmV1bGljaCB3cm90ZToKPj4+Pj4+PiBPbiAyOC4wMy4xNyBh dCAxMjo1MCwgPHJjb2pvY2FydUBiaXRkZWZlbmRlci5jb20+IHdyb3RlOgo+Pj4+PiBPbiAwMy8y OC8yMDE3IDAxOjQ3IFBNLCBKYW4gQmV1bGljaCB3cm90ZToKPj4+Pj4+Pj4+IE9uIDI4LjAzLjE3 IGF0IDEyOjI3LCA8cmNvam9jYXJ1QGJpdGRlZmVuZGVyLmNvbT4gd3JvdGU6Cj4+Pj4+Pj4gT24g MDMvMjgvMjAxNyAwMTowMyBQTSwgSmFuIEJldWxpY2ggd3JvdGU6Cj4+Pj4+Pj4+Pj4+IE9uIDI4 LjAzLjE3IGF0IDExOjE0LCA8cmNvam9jYXJ1QGJpdGRlZmVuZGVyLmNvbT4gd3JvdGU6Cj4+Pj4+ Pj4+PiBJJ20gbm90IHN1cmUgdGhhdCB0aGUgUkVUUlkgbW9kZWwgaXMgd2hhdCB0aGUgZ3Vlc3Qg T1MgZXhwZWN0cy4gQUZBSUssIGEKPj4+Pj4+Pj4+IGZhaWxlZCBDTVBYQ0hHIHNob3VsZCBoYXBw ZW4ganVzdCBvbmNlLCB3aXRoIHRoZSBwcm9wZXIgcmVnaXN0ZXJzIGFuZCBaRgo+Pj4+Pj4+Pj4g c2V0LiBUaGUgZ3Vlc3Qgc3VyZWx5IGV4cGVjdHMgbmVpdGhlciB0aGF0IHRoZSBpbnN0cnVjdGlv biByZXN1bWUgdW50aWwKPj4+Pj4+Pj4+IGl0IHN1Y2NlZWRzLCBub3IgdGhhdCBzb21lIGhpZGRl biBsb29wIGdvZXMgb24gZm9yIGFuIHVuZGV0ZXJtaW5hdGUKPj4+Pj4+Pj4+IGFtbW91bnQgb2Yg dGltZSB1bnRpbCBhIENNUFhDSEcgc3VjY2VlZHMuCj4+Pj4+Pj4+Cj4+Pj4+Pj4+IFRoZSBndWVz dCBkb2Vzbid0IG9ic2VydmUgdGhlIENNUFhDSEcgZmFpbGluZyAtIFJFVFJZIGxlYWRzIHRvCj4+ Pj4+Pj4+IHRoZSBpbnN0cnVjdGlvbiBiZWluZyByZXN0YXJ0ZWQgaW5zdGVhZCBvZiBjb21wbGV0 ZWQuCj4+Pj4+Pj4KPj4+Pj4+PiBJbmRlZWQsIGJ1dCBpdCB3b3JrcyBkaWZmZXJlbnRseSB3aXRo IGh2bV9lbXVsYXRlX29uZV92bV9ldmVudCgpIHdoZXJlCj4+Pj4+Pj4gUkVUUlkgY3VycmVudGx5 IHdvdWxkIGhhdmUgdGhlIGluc3RydWN0aW9uIGJlIHJlLWV4ZWN1dGVkIChwcm9wZXJseQo+Pj4+ Pj4+IHJlLWV4ZWN1dGVkLCBub3QganVzdCByZS1lbXVsYXRlZCkgYnkgdGhlIGd1ZXN0Lgo+Pj4+ Pj4KPj4+Pj4+IFJpZ2h0IC0gc2VlIG15IG90aGVyIHJlcGx5IHRvIEFuZHJldzogVGhlIGZ1bmN0 aW9uIGxpa2VseSB3b3VsZAo+Pj4+Pj4gbmVlZCB0byB0ZWxsIGFwYXJ0IGd1ZXN0IENNUFhDSEcg dXNlcyBmcm9tIHVzIHVzaW5nIHRoZSBpbnNuIHRvCj4+Pj4+PiBjYXJyeSBvdXQgdGhlIHdyaXRl IGJ5IHNvbWUgb3RoZXIgb25lLiBUaGF0IG1heSBpbnZvbHZlCj4+Pj4+PiBhZGp1c3RtZW50cyB0 byB0aGUgbWVtb3J5IHdyaXRlIGxvZ2ljIGluIHg4Nl9lbXVsYXRlKCkgaXRzZWxmLCBhcwo+Pj4+ Pj4gdGhlIGxhdGUgZmFpbHVyZSBvZiB0aGUgY29tcGFyaXNvbiB0aGVuIHdvdWxkIGFsc28gbmVl ZCB0byBiZQo+Pj4+Pj4gY29tbXVuaWNhdGVkIGJhY2sgKHZpYSBaRiBjbGVhcikgdG8gdGhlIGd1 ZXN0Lgo+Pj4+Pgo+Pj4+PiBFeGFjdGx5LCBpdCB3b3VsZCByZXF1aXJlIHF1aXRlIHNvbWUgcmV3 b3JraW5nIG9mIHg4Nl9lbXVsYXRlKCkuCj4+Pj4KPj4+PiBJIGhhZCBpbWFnaW5lZCBpdCB0byBi ZSBsZXNzIGludHJ1c2l2ZSAob3V0c2lkZSBvZiB4ODZfZW11bGF0ZSgpKSwKPj4+PiBidXQgSSd2 ZSBub3cgbGVhcm5lZCB3aHkgQW5kcmV3IHdhcyBhYmxlIHRvIGdldCByaWQgb2YKPj4+PiBYODZF TVVMX0NNUFhDSEdfRkFJTEVEIC0gdGhlIGFwcGFyZW50bHkgaW50ZW5kZWQgYmVoYXZpb3IKPj4+ PiB3YXMgbmV2ZXIgaW1wbGVtZW50ZWQuIEF0dGFjaGVkIGEgZmlyc3QgdGFrZSBhdCBpdCwgd2hp Y2ggaGFzCj4+Pj4gc2VlbiBzbW9rZSB0ZXN0aW5nLCBidXQgbm90aGluZyBtb3JlLiBUaGUgd2F5 IGl0IGVuZHMgdXAgYmVpbmcKPj4+PiBJIGRvbid0IHRoaW5rIHRoaXMgY2FuIHJlYXNvbmFibHkg YmUgY29uc2lkZXJlZCBmb3IgNC45IGF0IHRoaXMKPj4+PiBwb2ludCBpbiB0aW1lLiAoQWxzbyBD Yy1pbmcgVGltIGZvciB0aGUgc2hhZG93IGNvZGUgY2hhbmdlcywKPj4+PiBldmVuIGlmIHRoaXMg aXNuJ3QgcmVhbGx5IGEgcHJvcGVyIHBhdGNoIHN1Ym1pc3Npb24uKQo+Pj4KPj4+IFRoYW5rcyEg SSdsbCBnaXZlIGEgc3BpbiB3aXRoIGEgbW9kaWZpZWQgdmVyc2lvbiBvZiBteSBDTVBYQ0hHIHBh dGNoIGFzCj4+PiBzb29uIGFzIHBvc3NpYmxlLgo+PiAKPj4gV2l0aCB0aGUgYXR0YWNoZWQgcGF0 Y2ggd2l0aCBodm1lbXVsX2NtcHhjaGcoKSBub3cgcmV0dXJuaW5nCj4+IFg4NkVNVUxfQ01QWENI R19GQUlMRUQgaWYgX19jbXB4Y2hnKCkgZmFpbHMgbXkgKDMyLWJpdCkgV2luZG93cyA3IGd1ZXN0 Cj4+IGdldHMgc3R1Y2sgYXQgdGhlICJTdGFydGluZyBXaW5kb3dzIiBzY3JlZW4uCgpUaGF0J3Mg d2l0aCBvciB3aXRob3V0IG1vbml0b3JpbmcgaW4gdXNlPyBJIHNwZWNpZmljYWxseSBkaWQgdHJ5 IGEKMzItYml0IFdpbjcgZ3Vlc3QsIGFuZCBJIGRpZG4ndCBoYXZlIGFuIGlzc3VlLiBCdXQgdGhl biBhZ2FpbiBhCnNpbmdsZSBydW4gbWF5IG5vdCBtZWFuIG11Y2guCgo+IEFuZCBhZ2FpbiB0aGlz IGNoYW5nZToKPiAKPiAxMTYyICAgICBpZiAoIF9fY21weGNoZyhtYXAsIG9sZCwgbmV3LCBieXRl cykgIT0gb2xkICkKPiAxMTYzICAgICB7Cj4gMTE2NCAgICAgICAgIG1lbWNweShwX29sZCwgbWFw LCBieXRlcyk7Cj4gMTE2NSAgICAgICAgIHJjID0gWDg2RU1VTF9DTVBYQ0hHX0ZBSUxFRDsKPiAx MTY2ICAgICB9Cj4gCj4gaS5lLiBkb2luZyB0aGUgYWNjdW11bGF0b3IgPC0gZGVzdGluYXRpb24g cGFydCBvZiBhIGZhaWxlZCBDTVBYQ0hHIHdoaWNoCj4gbWlnaHQgYmUgbWlzc2luZyBmcm9tIHlv dXIgcGF0Y2ggbGVhZHMgbWUgYWdhaW4gdG8gQlNPRHMuCgpNaXNzaW5nIGZyb20gbXkgcGF0Y2g/ IFdoeSBhbmQvb3Igd2hlcmU/IEl0J3Mgbm90IGNsZWFyIHRvIG1lIHdoaWNoCmZ1bmN0aW9uIHRo ZSBhYm92ZSBjb2RlIGZyYWdtZW50IGlzIHN1cHBvc2VkIHRvIGdvIGludG8uIEkgbWlnaHQKZ3Vl c3MgaHZtZW11bF9jbXB4Y2hnKCksIGJ1dCB0aGVuIG15IHBhdGNoIGRvZXNuJ3QgYWx0ZXIgaXRz CmJlaGF2aW9yIChmcm9tIGZvcndhcmRpbmcgdG8gaHZtZW1sX3dyaXRlKCkpLCBhbmQgaGVuY2Ug SSBkb24ndApzZWUgd2h5IG15IHBhdGNoIHdvdWxkIG5lZWQgdG8gZG8gc3VjaCBhbiBhZGp1c3Rt ZW50LgoKV2hhdCBJIGRvIG5vdGUgdGhvdWdoIGlzIHRoYXQgeW91IGRvbid0IGNvcHkgYmFjayB0 aGUgdmFsdWUKX19jbXB4Y2hnKCkgcmV0dXJucywgeWV0IHRoYXQncyB3aGF0IGlzIG5lZWRlZC4g Km1hcCBtYXkKaGF2ZSBjaGFuZ2VkIGFnYWluIGFscmVhZHkuCgpKYW4KCgpfX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpYZW4tZGV2ZWwgbWFpbGluZyBsaXN0 Clhlbi1kZXZlbEBsaXN0cy54ZW4ub3JnCmh0dHBzOi8vbGlzdHMueGVuLm9yZy94ZW4tZGV2ZWwK