From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Cooper Subject: Re: [PATCH v9 02/11] x86/cpuid: Handling of IBRS/IBPB, STIBP and IBRS for guests Date: Fri, 19 Jan 2018 12:01:14 +0000 Message-ID: <6e6b06da-c6b1-0972-b078-4d351d1ef2c7@citrix.com> References: <1516290370-14958-1-git-send-email-andrew.cooper3@citrix.com> <1516290370-14958-3-git-send-email-andrew.cooper3@citrix.com> <5A61D91102000078001A0481@prv-mh.provo.novell.com> <86dc061f-afa7-b260-b096-b6efbf464dec@citrix.com> <5A61E89202000078001A0556@prv-mh.provo.novell.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <5A61E89202000078001A0556@prv-mh.provo.novell.com> Content-Language: en-GB List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: Jan Beulich Cc: Xen-devel List-Id: xen-devel@lists.xenproject.org T24gMTkvMDEvMTggMTE6NDYsIEphbiBCZXVsaWNoIHdyb3RlOgo+Pj4+IE9uIDE5LjAxLjE4IGF0 IDExOjUzLCA8YW5kcmV3LmNvb3BlcjNAY2l0cml4LmNvbT4gd3JvdGU6Cj4+IE9uIDE5LzAxLzE4 IDEwOjQwLCBKYW4gQmV1bGljaCB3cm90ZToKPj4+Pj4+IE9uIDE4LjAxLjE4IGF0IDE2OjQ2LCA8 YW5kcmV3LmNvb3BlcjNAY2l0cml4LmNvbT4gd3JvdGU6Cj4+Pj4gRm9yIGd1ZXN0IHNhZmV0eSwg d2UgdHJlYXQgU1RJQlAgYXMgc3BlY2lhbCwgYWx3YXlzIG92ZXJyaWRlIHRoZSB0b29sc3RhY2sK Pj4+PiBjaG9pY2UsIGFuZCBhbHdheXMgYWR2ZXJ0aXNlIFNUSUJQIGlmIElCUlMgaXMgYXZhaWxh YmxlLiAgVGhpcyByZW1vdmVzIHRoZQo+Pj4+IGNvcm5lciBjYXNlIHdoZXJlIFNUSUJQIGlzIG5v dCBhZHZlcnRpc2VkLCBidXQgdGhlIGd1ZXN0IGlzIHJ1bm5pbmcgb24KPj4+PiBIVC1jYXBhYmxl IGhhcmR3YXJlIHdoZXJlIGl0IGRvZXMgbWF0dGVyLgo+Pj4gSSBndWVzcyB0aGUgYW5zd2VyIHRv IG15IHF1ZXN0aW9uIG1heSBsaXZlIHNvbWV3aGVyZSBsYXRlciBpbiB0aGUKPj4+IHNlcmllcywg YnV0IHNpbmNlIEkgaGF2ZW4ndCBnb3QgdGhlcmUgeWV0OiBJcyB0aGlzIGJhc2VkIG9uIHRoZQo+ Pj4gYXNzdW1wdGlvbiB0aGF0IG9uIEhULWNhcGFibGUgaGFyZHdhcmUgdGhleSB3b3VsZCBhbHdh eXMgYmUKPj4+IGF2YWlsYWJsZSB0b2dldGhlcj8gT3RoZXJ3aXNlLCBob3cgZG8geW91IGVtdWxh dGUgU1RJQlAgZm9yIHRoZQo+Pj4gZ3Vlc3QgaWYgYWxsIHlvdSd2ZSBnb3QgaXMgSUJSUy9JQlBC Pwo+PiBUaGUgc2FmZXR5IGRlcGVuZHMgb24gdGhlIGd1ZXN0IHNlZWluZyBTVElCUCBhbmQgdXNp bmcgaXQgaWYgaXQgd2FudHMKPj4gdG8uICAoTm90IHRoYXQgSSd2ZSBzZWVuIGFueSBzaWduIG9m IFNUSUJQIGluIHRoZSBMaW51eCBjb2RlLCBvciBmcm9tCj4+IG9ic2VydmluZyB3aGF0IFdpbmRv d3MgYXBwZWFycyB0byBkbykuCj4+Cj4+IEZvciB0b3BvbG9neSByZWFzb25zIChkZXNwaXRlIHRo ZSBvdGhlciBjYW5zIG9mIHdvcm1zIGluIHRoaXMgYXJlYSksIHdlCj4+IHVuaWxhdGVyYWxseSBz ZXQgSFQsIHNvIGFsbCBndWVzdHMgc2hvdWxkIGZpbmQgdGhlbXNlbHZlcyBvbiBIVC1jYXBhYmxl Cj4+IHN5c3RlbXMuCj4gQnV0IHRoaXMgZG9lc24ndCBhbnN3ZXIgbXkgcXVlc3Rpb246IFdoYXQg ZG8geW91IGRvIGlmIHRoZSBndWVzdAo+IHVzZXMgU1RJQlAgKGJlY2F1c2UgeW91J3ZlIHRvbGQg aXQgdGhhdCBpdCBjYW4pLCBidXQgdGhlIGhhcmR3YXJlCj4gZG9lc24ndCBzdXBwb3J0IGl0PyBB cmVuJ3QgeW91IHByb2R1Y2luZyBhIGZhbHNlIHNlbnNlIG9mIHNlY3VyaXR5Cj4gdG8gdGhlIGd1 ZXN0IHRoaXMgd2F5PwoKVGhlIGVudGlyZSBwb2ludCBvZiBTUEVDX0NUUkxfU1RJQlAgYmVpbmcg aWdub3JlZCBvbiBzb21lIGhhcmR3YXJlIGlzIHRvCmxldCB0aGlzIHdvcmsuCgpCeSBhZHZlcnRp c2luZyBTVElCUCwgd2UgYXJlIHRlbGxpbmcgdGhlIGd1ZXN0ICJUaGVyZSBtaWdodCBiZSAoYnV0 IG5vdApkZWZpbml0ZWx5KSBpbnRlcmZlcmVuY2UgZnJvbSBvdGhlciB0aHJlYWRzIGluIHRoZSBC VEIuwqAgSWYgeW91IGNhcmUKYWJvdXQgdGhpcywgeW91IHNob3VsZCBzZXQgU1BFQ19DVFJMLlNU SUJQIi4KCk9uIGhhcmR3YXJlIHdoZXJlIHRoZXJlIGlzIGRlZmluaXRlbHkgbm8gaW50ZXJmZXJl bmNlLCB0aGlzIGlzIGEgbm9wLgoKSW4gYW55IHNpdHVhdGlvbiB3aGVyZSBhIGd1ZXN0IG1pZ2h0 IG1pZ3JhdGUgdG8gYSBob3N0IHdoZXJlIHRoZXJlIGlzCmludGVyZmVyZW5jZSwgaXQgbmVlZHMg dG8ga25vdyBhYm91dCBTVElCUCBzbyAoaWYgaXQgY2FyZXMpIGl0IGNhbgpjaG9vc2UgdG8gc2V0 IFNQRUNfQ1RSTC5TVElCUC4KCn5BbmRyZXcKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fClhlbi1kZXZlbCBtYWlsaW5nIGxpc3QKWGVuLWRldmVsQGxpc3Rz LnhlbnByb2plY3Qub3JnCmh0dHBzOi8vbGlzdHMueGVucHJvamVjdC5vcmcvbWFpbG1hbi9saXN0 aW5mby94ZW4tZGV2ZWw=