From mboxrd@z Thu Jan 1 00:00:00 1970 From: Brian Woods Subject: Re: [PATCH v2 for-4.11] x86/pv: Hide more EFER bits from PV guests Date: Mon, 7 May 2018 11:21:54 -0500 Message-ID: <20180507162038.GA32212@amd.com> References: <1525687223-4060-1-git-send-email-andrew.cooper3@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Content-Disposition: inline In-Reply-To: <1525687223-4060-1-git-send-email-andrew.cooper3@citrix.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: Andrew Cooper Cc: Brian Woods , Suravee Suthikulpanit , Jan Beulich , Xen-devel List-Id: xen-devel@lists.xenproject.org T24gTW9uLCBNYXkgMDcsIDIwMTggYXQgMTE6MDA6MjNBTSArMDEwMCwgQW5kcmV3IENvb3BlciB3 cm90ZToKPiBXZSBkb24ndCBhZHZlcnRpc2UgU1ZNIGluIENQVUlEIHNvIGEgUFYgZ3Vlc3Qgc2hv dWxkbid0IGJlIHVuZGVyIHRoZQo+IGltcHJlc3Npb24gdGhhdCBpdCBjYW4gdXNlIFNWTSBmdW5j dGlvbmFsaXR5LCBidXQgZGVzcGl0ZSB0aGlzLCBpdCByZWFsbHkKPiBzaG91bGRuJ3Qgc2VlIFNW TUUgc2V0IHdoZW4gcmVhZGluZyBFRkVSLgo+IAo+IE9uIEludGVsIHByb2Nlc3NvcnMsIDMyYml0 IFBWIGd1ZXN0cyBkb24ndCBzZWUsIGFuZCBjYW4ndCB1c2UgU1lTQ0FMTC4KPiAKPiBJbnRyb2R1 Y2UgRUZFUl9LTk9XTl9NQVNLIHRvIHdoaXRlbGlzdCB0aGUgZmVhdHVyZXMgWGVuIGtub3dzIGFi b3V0LCBhbmQgdXNlCj4gdGhpcyB0byBjbGFtcCB0aGUgZ3Vlc3RzIHZpZXcuCj4gCj4gVGFrZSB0 aGUgb3Bwb3J0dW5pdHkgdG8gcmV1c2UgdGhlIG1hc2sgdG8gc2ltcGxpZnkgc3ZtX3ZtY2JfaXN2 YWxpZCgpLCBhbmQKPiBjaGFuZ2UgInVuZGVmaW5lZCIgdG8gInVua25vd24iIGluIHRoZSBwcmlu dCBtZXNzYWdlLCBhcyB0aGVyZSBpcyBhdCBsZWFzdAo+IEVGRVIuVENFIChUcmFuc2xhdGlvbiBD YWNoZSBFeHRlbnNpb24pIGRlZmluZWQgYnV0IHVua25vd24gdG8gWGVuLgo+IAo+IFNpZ25lZC1v ZmYtYnk6IEFuZHJldyBDb29wZXIgPGFuZHJldy5jb29wZXIzQGNpdHJpeC5jb20+Cj4gUmV2aWV3 ZWQtYnk6IEJvcmlzIE9zdHJvdnNreSA8Ym9yaXMub3N0cm92c2t5QG9yYWNsZS5jb20+Cj4gUmVs ZWFzZS1hY2tlZC1ieTogSnVlcmdlbiBHcm9zcyA8amdyb3NzQHN1c2UuY29tPgo+IC0tLQo+IEND OiBKYW4gQmV1bGljaCA8SkJldWxpY2hAc3VzZS5jb20+Cj4gQ0M6IFN1cmF2ZWUgU3V0aGlrdWxw YW5pdCA8c3VyYXZlZS5zdXRoaWt1bHBhbml0QGFtZC5jb20+Cj4gQ0M6IEJyaWFuIFdvb2RzIDxi cmlhbi53b29kc0BhbWQuY29tPgo+IAo+IEFyZ3VhYmx5LCB0aGlzIHdhbnRzIGJhY2twb3J0aW5n IHRvIHRoZSBzdGFibGUgdHJlZXMsIHNvIHNob3VsZCBiZSBjb25zaWRlcmVkCj4gZm9yIDQuMTEg YXQgdGhpcyBwb2ludC4KPiAtLS0KPiAgeGVuL2FyY2gveDg2L2h2bS9zdm0vc3ZtZGVidWcuYyB8 ICA1ICsrLS0tCj4gIHhlbi9hcmNoL3g4Ni9wdi9lbXVsLXByaXYtb3AuYyAgfCAxMSArKysrKysr KystLQo+ICB4ZW4vaW5jbHVkZS9hc20teDg2L21zci1pbmRleC5oIHwgIDMgKysrCj4gIDMgZmls ZXMgY2hhbmdlZCwgMTQgaW5zZXJ0aW9ucygrKSwgNSBkZWxldGlvbnMoLSkKPiAKPiBkaWZmIC0t Z2l0IGEveGVuL2FyY2gveDg2L2h2bS9zdm0vc3ZtZGVidWcuYyBiL3hlbi9hcmNoL3g4Ni9odm0v c3ZtL3N2bWRlYnVnLmMKPiBpbmRleCA2YzIxNWQxLi5kMzVlNDA1IDEwMDY0NAo+IC0tLSBhL3hl bi9hcmNoL3g4Ni9odm0vc3ZtL3N2bWRlYnVnLmMKPiArKysgYi94ZW4vYXJjaC94ODYvaHZtL3N2 bS9zdm1kZWJ1Zy5jCj4gQEAgLTEzMyw5ICsxMzMsOCBAQCBib29sIHN2bV92bWNiX2lzdmFsaWQo Y29uc3QgY2hhciAqZnJvbSwgY29uc3Qgc3RydWN0IHZtY2Jfc3RydWN0ICp2bWNiLAo+ICAgICAg ICAgIFBSSU5URigiRFI3OiBiaXRzIFs2MzozMl0gYXJlIG5vdCB6ZXJvICglIyJQUkl4NjQiKVxu IiwKPiAgICAgICAgICAgICAgICAgdm1jYl9nZXRfZHI3KHZtY2IpKTsKPiAgCj4gLSAgICBpZiAo IGVmZXIgJiB+KEVGRVJfU0NFIHwgRUZFUl9MTUUgfCBFRkVSX0xNQSB8IEVGRVJfTlggfCBFRkVS X1NWTUUgfAo+IC0gICAgICAgICAgICAgICAgICBFRkVSX0xNU0xFIHwgRUZFUl9GRlhTRSkgKQo+ IC0gICAgICAgIFBSSU5URigiRUZFUjogdW5kZWZpbmVkIGJpdHMgYXJlIG5vdCB6ZXJvICglIyJQ Ukl4NjQiKVxuIiwgZWZlcik7Cj4gKyAgICBpZiAoIGVmZXIgJiB+RUZFUl9LTk9XTl9NQVNLICkK PiArICAgICAgICBQUklOVEYoIkVGRVI6IHVua25vd24gYml0cyBhcmUgbm90IHplcm8gKCUjIlBS SXg2NCIpXG4iLCBlZmVyKTsKPiAgCj4gICAgICBpZiAoIGh2bV9lZmVyX3ZhbGlkKHYsIGVmZXIs IC0xKSApCj4gICAgICAgICAgUFJJTlRGKCJFRkVSOiAlcyAoJSJQUkl4NjQiKVxuIiwgaHZtX2Vm ZXJfdmFsaWQodiwgZWZlciwgLTEpLCBlZmVyKTsKPiBkaWZmIC0tZ2l0IGEveGVuL2FyY2gveDg2 L3B2L2VtdWwtcHJpdi1vcC5jIGIveGVuL2FyY2gveDg2L3B2L2VtdWwtcHJpdi1vcC5jCj4gaW5k ZXggMTVmNDJiMy4uY2UyZWM3NiAxMDA2NDQKPiAtLS0gYS94ZW4vYXJjaC94ODYvcHYvZW11bC1w cml2LW9wLmMKPiArKysgYi94ZW4vYXJjaC94ODYvcHYvZW11bC1wcml2LW9wLmMKPiBAQCAtODY3 LDkgKzg2NywxNiBAQCBzdGF0aWMgaW50IHJlYWRfbXNyKHVuc2lnbmVkIGludCByZWcsIHVpbnQ2 NF90ICp2YWwsCj4gICAgICAgICAgcmV0dXJuIFg4NkVNVUxfT0tBWTsKPiAgCj4gICAgICBjYXNl IE1TUl9FRkVSOgo+IC0gICAgICAgICp2YWwgPSByZWFkX2VmZXIoKTsKPiArICAgICAgICAvKiBI aWRlIHVua25vd24gYml0cywgYW5kIHVuY29uZGl0aW9uYWxseSBoaWRlIFNWTUUgZnJvbSBndWVz dHMuICovCj4gKyAgICAgICAgKnZhbCA9IHJlYWRfZWZlcigpICYgRUZFUl9LTk9XTl9NQVNLICYg fkVGRVJfU1ZNRTsKPiArICAgICAgICAvKgo+ICsgICAgICAgICAqIEhpZGUgdGhlIDY0LWJpdCBm ZWF0dXJlcyBmcm9tIDMyLWJpdCBndWVzdHMuICBTQ0UgaGFzCj4gKyAgICAgICAgICogdmVuZG9y LWRlcGVuZGVudCBiZWhhdmlvdXIuCj4gKyAgICAgICAgICovCj4gICAgICAgICAgaWYgKCBpc19w dl8zMmJpdF9kb21haW4oY3VycmQpICkKPiAtICAgICAgICAgICAgKnZhbCAmPSB+KEVGRVJfTE1F IHwgRUZFUl9MTUEgfCBFRkVSX0xNU0xFKTsKPiArICAgICAgICAgICAgKnZhbCAmPSB+KEVGRVJf TE1FIHwgRUZFUl9MTUEgfCBFRkVSX0xNU0xFIHwKPiArICAgICAgICAgICAgICAgICAgICAgIChi b290X2NwdV9kYXRhLng4Nl92ZW5kb3IgPT0gWDg2X1ZFTkRPUl9JTlRFTAo+ICsgICAgICAgICAg ICAgICAgICAgICAgID8gRUZFUl9TQ0UgOiAwKSk7Cj4gICAgICAgICAgcmV0dXJuIFg4NkVNVUxf T0tBWTsKPiAgCj4gICAgICBjYXNlIE1TUl9LN19GSURfVklEX0NUTDoKPiBkaWZmIC0tZ2l0IGEv eGVuL2luY2x1ZGUvYXNtLXg4Ni9tc3ItaW5kZXguaCBiL3hlbi9pbmNsdWRlL2FzbS14ODYvbXNy LWluZGV4LmgKPiBpbmRleCBjOWY0NGViLi42ZDk0ZDY1IDEwMDY0NAo+IC0tLSBhL3hlbi9pbmNs dWRlL2FzbS14ODYvbXNyLWluZGV4LmgKPiArKysgYi94ZW4vaW5jbHVkZS9hc20teDg2L21zci1p bmRleC5oCj4gQEAgLTMxLDYgKzMxLDkgQEAKPiAgI2RlZmluZSBFRkVSX0xNU0xFCQkoMTw8X0VG RVJfTE1TTEUpCj4gICNkZWZpbmUgRUZFUl9GRlhTRQkJKDE8PF9FRkVSX0ZGWFNFKQo+ICAKPiAr I2RlZmluZSBFRkVSX0tOT1dOX01BU0sJCShFRkVSX1NDRSB8IEVGRVJfTE1FIHwgRUZFUl9MTUEg fCBFRkVSX05YIHwgXAo+ICsJCQkJIEVGRVJfU1ZNRSB8IEVGRVJfTE1TTEUgfCBFRkVSX0ZGWFNF KQo+ICsKPiAgLyogU3BlY3VsYXRpb24gQ29udHJvbHMuICovCj4gICNkZWZpbmUgTVNSX1NQRUNf Q1RSTAkJCTB4MDAwMDAwNDgKPiAgI2RlZmluZSBTUEVDX0NUUkxfSUJSUwkJCShfQUMoMSwgVUxM KSA8PCAwKQo+IC0tIAo+IDIuMS40Cj4gCgpSZXZpZXdlZC1ieTogQnJpYW4gV29vZHMgPGJyaWFu Lndvb2RzQGFtZC5jb20+CgotLSAKQnJpYW4gV29vZHMKCl9fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fClhlbi1kZXZlbCBtYWlsaW5nIGxpc3QKWGVuLWRldmVs QGxpc3RzLnhlbnByb2plY3Qub3JnCmh0dHBzOi8vbGlzdHMueGVucHJvamVjdC5vcmcvbWFpbG1h bi9saXN0aW5mby94ZW4tZGV2ZWw=