From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Cooper Subject: Re: [PATCH v9 06/11] x86/entry: Organise the use of MSR_SPEC_CTRL at each entry/exit point Date: Mon, 22 Jan 2018 13:52:23 +0000 Message-ID: <87d3a2ef-41cd-e42d-5ed1-7a929d664a9f@citrix.com> References: <1516290370-14958-1-git-send-email-andrew.cooper3@citrix.com> <1516290370-14958-7-git-send-email-andrew.cooper3@citrix.com> <5A61E7E702000078001A0553@prv-mh.provo.novell.com> <1fe16c0c-7c91-f43f-c3b6-47e82dcd2909@citrix.com> <5A6205FF02000078001A0652@prv-mh.provo.novell.com> <26535bac-c79e-014f-924c-cfbe7aa3702b@citrix.com> <5A65E1BB02000078001A103D@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: <5A65E1BB02000078001A103D@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 T24gMjIvMDEvMTggMTI6MDYsIEphbiBCZXVsaWNoIHdyb3RlOgo+Pj4+IE9uIDIyLjAxLjE4IGF0 IDEyOjQyLCA8YW5kcmV3LmNvb3BlcjNAY2l0cml4LmNvbT4gd3JvdGU6Cj4+IE9uIDE5LzAxLzE4 IDEzOjUxLCBKYW4gQmV1bGljaCB3cm90ZToKPj4+Pj4+IE9uIDE5LjAxLjE4IGF0IDE0OjM2LCA8 YW5kcmV3LmNvb3BlcjNAY2l0cml4LmNvbT4gd3JvdGU6Cj4+Pj4gT24gMTkvMDEvMTggMTE6NDMs IEphbiBCZXVsaWNoIHdyb3RlOgo+Pj4+Pj4+PiBPbiAxOC4wMS4xOCBhdCAxNjo0NiwgPGFuZHJl dy5jb29wZXIzQGNpdHJpeC5jb20+IHdyb3RlOgo+Pj4+Pj4gQEAgLTcyOSw2ICs3NjAsOSBAQCBF TlRSWShubWkpCj4+Pj4+PiAgaGFuZGxlX2lzdF9leGNlcHRpb246Cj4+Pj4+PiAgICAgICAgICBT QVZFX0FMTCBDTEFDCj4+Pj4+PiAgCj4+Pj4+PiArICAgICAgICBTUEVDX0NUUkxfRU5UUllfRlJP TV9JTlRSIC8qIFJlcTogJXJzcD1yZWdzLCBDbG9iOiBhY2QgKi8KPj4+Pj4+ICsgICAgICAgIC8q IFdBUk5JTkchIGByZXRgLCBgY2FsbCAqYCwgYGptcCAqYCBub3Qgc2FmZSBiZWZvcmUgdGhpcyBw b2ludC4gKi8KPj4+Pj4gRm9sbG93aW5nIG15IGNvbnNpZGVyYXRpb25zIHRvd2FyZHMgYWx0ZXJu YXRpdmUgcGF0Y2hpbmcgdG8KPj4+Pj4gZWxpbWluYXRlIGFzIG11Y2ggb3ZlcmhlYWQgYXMgcG9z c2libGUgZnJvbSB0aGUgTWVsdGRvd24KPj4+Pj4gYmFuZC1haWQgaW4gY2FzZSBpdCBpcyBiZWlu ZyBkaXNhYmxlZCwgSSdtIHJhdGhlciBoZXNpdGFudCB0byBzZWUgYW55Cj4+Pj4+IHBhdGNoYWJs ZSBjb2RlIGJlaW5nIGludHJvZHVjZWQgaW50byB0aGUgTk1JLyNNQyBlbnRyeSBwYXRocwo+Pj4+ PiB3aXRob3V0IHRoZSBwYXRjaGluZyBsb2dpYyBmaXJzdCBiZWluZyBtYWRlIHNhZmUgaW4gdGhp cyByZWdhcmQuCj4+Pj4+IEV4Y2VwdGlvbnMgY29taW5nIGhlcmUgYXJlbid0IHZlcnkgZnJlcXVl bnQgKGV4Y2VwdCBwZXJoYXBzIG9uCj4+Pj4+IGhhcmR3YXJlIGFib3V0IHRvIGRpZSksIHNvIHRo ZSBwYXRoIGlzbid0IHBlcmZvcm1hbmNlIGNyaXRpY2FsLgo+Pj4+PiBUaGVyZWZvcmUgSSB0aGlu ayB3ZSBzaG91bGQgdHJ5IHRvIGF2b2lkIGFueSBwYXRjaGluZyBoZXJlLCBhbmQKPj4+Pj4ganVz dCBjb25kaXRpb25hbHMgaW5zdGVhZC4gVGhpcyBpbiBmYWN0IGlzIG9uZSBvZiB0aGUgcmVhc29u cyB3aHkgSQo+Pj4+PiBkaWRuJ3Qgd2FudCB0byBtYWNyby1pemUgdGhlIGFzc2VtYmx5IGFkZGl0 aW9ucyBkb25lIGluIHRoZQo+Pj4+PiBNZWx0ZG93biBiYW5kLWFpZC4KPj4+Pj4KPj4+Pj4gSSBk byByZWFsaXplIHRoYXQgdGhpcyB0aGVuIGFsc28gYWZmZWN0cyB0aGUgZXhpdC10by1YZW4gcGF0 aCwKPj4+Pj4gd2hpY2ggSSBhZ3JlZSBpcyBsZXNzIGRlc2lyYWJsZSB0byB1c2UgY29uZGl0aW9u YWxzIG9uLgo+Pj4+IFdoaWxlIEkgYWdyZWUgdGhhdCBvdXIgbGFjayBvZiBJU1Qtc2FmZSBwYXRj aGluZyBpcyBhIHByb2JsZW0sIHRoZXNlCj4+Pj4gYWx0ZXJuYXRpdmUgcG9pbnRzIGFyZSBhbHJl YWR5IHByZXNlbnQgb24gdGhlIE5NSSBhbmQgTUNFIHBhdGhzLCBhbmQKPj4+PiBuZWVkIHRvIGJl LiAgQXMgYSByZXN1bHQsIHRoZSBERiBoYW5kbGVyIGlzIGluIG5vIHdvcnNlIG9mIGEgcG9zaXRp b24uIAo+Pj4+IEFzIGEgcGVyZmVjdCBleGFtcGxlLCBvYnNlcnZlIHRoZSBDTEFDIGluIGNvbnRl eHQuCj4+PiBPaCwgaW5kZWVkLiBXZSBzaG91bGQgY2hhbmdlIHRoYXQuCj4+Pgo+Pj4+IEkgY291 bGQgcGVyaGFwcyBiZSB0YWxrZWQgaW50byBtYWtpbmcgYSBTUEVDX0NUUkxfRU5UUllfRlJPTV9J U1QgdmFyaWFudAo+Pj4+IHdoaWNoIGRvZXNuJ3QgdXNlIGFsdGVybmF0aXZlcyAoYnV0IElNTyB0 aGlzIGlzIHBvaW50bGVzcyBpbiB0aGUKPj4+PiBwcmVzZW5jZSBvZiBDTEFDKSwgYnV0IHN0aWxs IGRvbid0IHRoaW5rIGl0IGlzIHJlYXNvbmFibGUgdG8gdHJlYXQgREYKPj4+PiBkaWZmZXJlbnRs eSB0byBOTUkvTUNFLgo+Pj4gI0RGIGlzIGRlYmF0YWJsZTogT24gb25lIGhhbmQgSSBjYW4gc2Vl IHRoYXQgaWYgdGhpbmdzIGdvIHdyb25nLAo+Pj4gaXQgY2FuIGVxdWFsbHkgYmUgcmFpc2VkIGF0 IGFueSB0aW1lLiBPdG9oICNNQyBhbmQgZXZlbiBtb3JlIHNvCj4+PiBOTUkgY2FuIGJlIHJhaXNl ZCBfd2l0aG91dF8gdGhpbmdzIGdvaW5nIChmYXRhbGx5KSB3cm9uZywgaS5lLiB0aGUKPj4+IHBh dGNoaW5nIG1heSBicmVhayBhIGJvb3Qgd2hpY2ggd291bGQgb3RoZXJ3aXNlIGhhdmUgc3VjY2Vl ZGVkCj4+PiAod2hlcmVhcyB0aGUgI0RGIHdvdWxkIG1ha2UgdGhlIGJvb3QgZmFpbCBhbnl3YXkp Lgo+PiBJIGRvbid0IHNlZSBhIGNvbmNsdXNpb24gaGVyZSwgb3IgYSByZWFzb24gZm9yIHRyZWF0 aW5nICNERiBkaWZmZXJlbnRseQo+PiB0byBOTUkgb3IgI01DLgo+IE9kZCAtIEkgdGhvdWdodCBt eSByZXBseSB3YXMgcHJldHR5IGNsZWFyIGluIHRoaXMgcmVnYXJkLgoKVGhlIGNsZWFyIHdheSBv ZiByZXBseWluZyB3b3VsZCBiZSAiWWVzIC0gcGxlYXNlIHB1dCBpbiBjb25kaXRpb25hbHMgZm9y Cm5vdyIuCgp+QW5kcmV3CgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fXwpYZW4tZGV2ZWwgbWFpbGluZyBsaXN0Clhlbi1kZXZlbEBsaXN0cy54ZW5wcm9qZWN0 Lm9yZwpodHRwczovL2xpc3RzLnhlbnByb2plY3Qub3JnL21haWxtYW4vbGlzdGluZm8veGVuLWRl dmVs