From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Jan Beulich" Subject: Re: [PATCH SpectreV1+L1TF v6 8/9] common/grant_table: block speculative out-of-bound accesses Date: Wed, 13 Feb 2019 04:50:35 -0700 Message-ID: <5C64048B0200007800216478@prv1-mh.provo.novell.com> References: <1c2b8322-1b66-ccc6-9ba9-e86eafb0227a@amazon.de> <1549633489-12724-1-git-send-email-nmanthey@amazon.de> <1549633489-12724-9-git-send-email-nmanthey@amazon.de> <5C4ED1D402000078002119E6@prv1-mh.provo.novell.com> <9C03B9BA0200004637554D14@prv1-mh.provo.novell.com> <00FAA7AF020000F8B1E090C7@prv1-mh.provo.novell.com> <0101E7AF020000F8B1E090C7@prv1-mh.provo.novell.com> <5C532AC00200007800212EA2@prv1-mh.provo.novell.com> <01CCAAAF02000039B1E090C7@prv1-mh.provo.novell.com> <01CEAAAF02000039B1E090C7@prv1-mh.provo.novell.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from all-amaz-eas1.inumbo.com ([34.197.232.57] helo=us1-amaz-eas2.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1gtt3r-0005mh-KC for xen-devel@lists.xenproject.org; Wed, 13 Feb 2019 11:50:43 +0000 In-Reply-To: <01CEAAAF02000039B1E090C7@prv1-mh.provo.novell.com> Content-Disposition: inline List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: nmanthey@amazon.de Cc: Juergen Gross , Tim Deegan , Stefano Stabellini , Wei Liu , Konrad Rzeszutek Wilk , George Dunlap , Andrew Cooper , Ian Jackson , Dario Faggioli , Martin Pohlack , wipawel@amazon.de, Julien Grall , David Woodhouse , "Martin Mazein(amazein)" , xen-devel , Julian Stecklina , Bjoern Doebel List-Id: xen-devel@lists.xenproject.org Pj4+IE9uIDA4LjAyLjE5IGF0IDE0OjQ0LCA8bm1hbnRoZXlAYW1hem9uLmRlPiB3cm90ZToKPiBH dWVzdHMgY2FuIGlzc3VlIGdyYW50IHRhYmxlIG9wZXJhdGlvbnMgYW5kIHByb3ZpZGUgZ3Vlc3Qg Y29udHJvbGxlZAo+IGRhdGEgdG8gdGhlbS4gVGhpcyBkYXRhIGlzIGFsc28gdXNlZCBmb3IgbWVt b3J5IGxvYWRzLiBUbyBhdm9pZAo+IHNwZWN1bGF0aXZlIG91dC1vZi1ib3VuZCBhY2Nlc3Nlcywg d2UgdXNlIHRoZSBhcnJheV9pbmRleF9ub3NwZWMgbWFjcm8KPiB3aGVyZSBhcHBsaWNhYmxlLiBI b3dldmVyLCB0aGVyZSBhcmUgYWxzbyBtZW1vcnkgYWNjZXNzZXMgdGhhdCBjYW5ub3QKPiBiZSBw cm90ZWN0ZWQgYnkgYSBzaW5nbGUgYXJyYXkgcHJvdGVjdGlvbiwgb3IgbXVsdGlwbGUgYWNjZXNz ZXMgaW4gYQo+IHJvdy4gVG8gcHJvdGVjdCB0aGVzZSwgYSBub3NwZWMgYmFycmllciBpcyBwbGFj ZWQgYmV0d2VlbiB0aGUgYWN0dWFsCj4gcmFuZ2UgY2hlY2sgYW5kIHRoZSBhY2Nlc3MgdmlhIHRo ZSBibG9ja19zcGVjdWxhdGlvbiBtYWNyby4KPiAKPiBBcyBkaWZmZXJlbnQgdmVyc2lvbnMgb2Yg Z3JhbnQgdGFibGVzIHVzZSBzdHJ1Y3R1cmVzIG9mIGRpZmZlcmVudCBzaXplLAo+IGFuZCB0aGUg c3RhdHVzIGlzIGVuY29kZWQgaW4gYW4gYXJyYXkgZm9yIHZlcnNpb24gMiwgc3BlY3VsYXRpdmUK PiBleGVjdXRpb24gbWlnaHQgdG91Y2ggemVyby1pbml0aWFsaXplZCBzdHJ1Y3R1cmVzIG9mIHZl cnNpb24gMiB3aGlsZQo+IHRoZSB0YWJsZSBpcyBhY3R1YWxseSB1c2luZyB2ZXJzaW9uIDEuCgpX aHkgemVyby1pbml0aWFsaXplZD8gRGlkIEkgc3RpbGwgbm90IHN1Y2NlZWQgZGVtb25zdHJhdGlu ZyB0byB5b3UKdGhhdCBzcGVjdWxhdGlvbiBhbG9uZyBhIHYyIHBhdGggY2FuIGFjdHVhbGx5IG92 ZXJydW4gdjEgYXJyYXlzLApub3QganVzdCBhY2Nlc3MgcGFydHMgd2l0aCBtYXkgc3RpbGwgYmUg emVyby1pbml0aWFsaXplZD8KCj4gQEAgLTIwMyw4ICsyMDQsOSBAQCBzdGF0aWMgaW5saW5lIHVu c2lnbmVkIGludCBucl9zdGF0dXNfZnJhbWVzKGNvbnN0IHN0cnVjdCBncmFudF90YWJsZSAqZ3Qp Cj4gIH0KPiAgCj4gICNkZWZpbmUgTUFQVFJBQ0tfUEVSX1BBR0UgKFBBR0VfU0laRSAvIHNpemVv ZihzdHJ1Y3QgZ3JhbnRfbWFwcGluZykpCj4gLSNkZWZpbmUgbWFwdHJhY2tfZW50cnkodCwgZSkg XAo+IC0gICAgKCh0KS0+bWFwdHJhY2tbKGUpL01BUFRSQUNLX1BFUl9QQUdFXVsoZSklTUFQVFJB Q0tfUEVSX1BBR0VdKQo+ICsjZGVmaW5lIG1hcHRyYWNrX2VudHJ5KHQsIGUpICAgICAgICAgICAg ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgXAo+ICsgICAgKCh0KS0+bWFw dHJhY2tbYXJyYXlfaW5kZXhfbm9zcGVjKGUsICh0KS0+bWFwdHJhY2tfbGltaXQpICAgICAgICAg ICAgICAgICAgXAo+ICsgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgL01BUFRS QUNLX1BFUl9QQUdFXVsoZSklTUFQVFJBQ0tfUEVSX1BBR0VdKQoKSSB3b3VsZCBoYXZlIGhvcGVk IHRoYXQgdGhlIHBvaW50aW5nIG91dCBvZiBzaW1pbGFyIGZvcm1hdHRpbmcKaXNzdWVzIGVsc2V3 aGVyZSB3b3VsZCBoYXZlIGhhZCBhbiBpbXBhY3QgaGVyZSBhcyB3ZWxsLCBidXQKSSBzZWUgdGhl IC8gaXMgc3RpbGwgd3JvbmdseSBhdCB0aGUgYmVnaW5uaW5nIG9mIGEgbGluZSwgYW5kIGlzIHN0 aWxsCm5vdCBmb2xsb3dlZCBieSBhIGJsYW5rICh3b3VsZCBiZSAicHJlY2VkZWQiIGlmIGl0IHdh cyB3ZWxsCnBsYWNlZCkuIEFuZCB3aGlsZSBJIHJlYWxpemUgaXQncyBvbmx5IGNvZGUgbW92ZW1l bnQsIGFkZGluZwp0aGUgbWlzc2luZyBibGFua3MgYXJvdW5kICUgd291bGQgYmUgYXBwcmVjaWF0 ZWQgdG9vIGF0IHRoaXMKb2NjYXNpb24uCgo+IEBAIC05NjMsOSArOTY1LDEzIEBAIG1hcF9ncmFu dF9yZWYoCj4gICAgICAgICAgUElOX0ZBSUwodW5sb2NrX291dCwgR05UU1RfYmFkX2dudHJlZiwg IkJhZCByZWYgJSN4IGZvciBkJWRcbiIsCj4gICAgICAgICAgICAgICAgICAgb3AtPnJlZiwgcmd0 LT5kb21haW4tPmRvbWFpbl9pZCk7Cj4gIAo+ICsgICAgLyogTWFrZSBzdXJlIHRoZSBhYm92ZSBj aGVjayBpcyBub3QgYnlwYXNzZWQgc3BlY3VsYXRpdmVseSAqLwo+ICsgICAgYmxvY2tfc3BlY3Vs YXRpb24oKTsKPiArCj4gICAgICBhY3QgPSBhY3RpdmVfZW50cnlfYWNxdWlyZShyZ3QsIG9wLT5y ZWYpOwo+ICAgICAgc2hhaCA9IHNoYXJlZF9lbnRyeV9oZWFkZXIocmd0LCBvcC0+cmVmKTsKPiAt ICAgIHN0YXR1cyA9IHJndC0+Z3RfdmVyc2lvbiA9PSAxID8gJnNoYWgtPmZsYWdzIDogJnN0YXR1 c19lbnRyeShyZ3QsIG9wLT5yZWYpOwo+ICsgICAgc3RhdHVzID0gZXZhbHVhdGVfbm9zcGVjKHJn dC0+Z3RfdmVyc2lvbiA9PSAxKSA/ICZzaGFoLT5mbGFncwo+ICsgICAgICAgICAgICAgICAgICAg ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgOiAmc3RhdHVzX2VudHJ5KHJndCwgb3AtPnJl Zik7CgpEaWQgeW91IGNvbnNpZGVyIGZvbGRpbmcgdGhlIHR3byBwYWlycyBvZiBmZW5jZXMgeW91 IGVtaXQgaW50bwpvbmU/IE1vdmluZyB1cCB0aGUgYXNzaWdubWVudCB0byBzdGF0dXMgb3VnaHQg dG8gYWNoaWV2ZSB0aGlzLAphcyB0aGVuIHRoZSBibG9ja19zcGVjdWxhdGlvbigpIGNvdWxkIGJl IGRyb3BwZWQgYWZhaWN0LgoKVGhlbiBhZ2FpbiB5b3UgZG9uJ3QgYWx0ZXIgc2hhcmVkX2VudHJ5 X2hlYWRlcigpLiBJZiB0aGVyZSdzCmEgcmVhc29uIGZvciB5b3Ugbm90IGhhdmluZyBkb25lIHNv LCB0aGVuIGEgc2Vjb25kIGZlbmNlCmhlcmUgaXMgbmVlZGVkIGluIGFueSBldmVudC4KCldoYXQg YWJvdXQgdGhlIHZlcnNpb24gY2hlY2sgaW4gbnJfZ3JhbnRfZW50cmllcygpPyBJdCBhcHBlYXJz CnRvIG1lIGFzIGlmIGF0IGxlYXN0IGl0cyB1c2UgaW4gZ3JhbnRfbWFwX2V4aXN0cygpICh3aGlj aCBzaW1wbHkgaXMKdGhlIGZpcnN0IG9uZSBJJ3ZlIGZvdW5kKSBpcyBwcm9ibGVtYXRpYyB3aXRo b3V0IGFuIGFkanVzdG1lbnQuCkV2ZW4gd29yc2UsIC4uLgoKPiBAQCAtMTMyMSw3ICsxMzI3LDgg QEAgdW5tYXBfY29tbW9uKAo+ICAgICAgICAgIGdvdG8gdW5sb2NrX291dDsKPiAgICAgIH0KPiAg Cj4gLSAgICBhY3QgPSBhY3RpdmVfZW50cnlfYWNxdWlyZShyZ3QsIG9wLT5yZWYpOwo+ICsgICAg YWN0ID0gYWN0aXZlX2VudHJ5X2FjcXVpcmUocmd0LCBhcnJheV9pbmRleF9ub3NwZWMob3AtPnJl ZiwKPiArICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg ICAgIG5yX2dyYW50X2VudHJpZXMocmd0KSkpOwoKLi4uIHlvdSBhZGQgYSB1c2UgZS5nLiBoZXJl IHRvIF9ndWFyZF8gYWdhaW5zdCBzcGVjdWxhdGlvbi4KCkFuZCB3aGF0IGFib3V0IF9zZXRfc3Rh dHVzKCksIHVubWFwX2NvbW1vbl9jb21wbGV0ZSgpLApnbnR0YWJfZ3Jvd190YWJsZSgpLCBnbnR0 YWJfc2V0dXBfdGFibGUoKSwKcmVsZWFzZV9ncmFudF9mb3JfY29weSgpLCB0aGUgMm5kIG9uZSBp biBhY3F1aXJlX2dyYW50X2Zvcl9jb3B5KCksCnNldmVyYWwgb25lcyBpbiBnbnR0YWJfc2V0X3Zl cnNpb24oKSwgZ250dGFiX3JlbGVhc2VfbWFwcGluZ3MoKSwKdGhlIDNyZCBvbmUgaW4gbWVtX3No YXJpbmdfZ3JlZl90b19nZm4oKSwgZ250dGFiX21hcF9mcmFtZSgpLAphbmQgZ250dGFiX2dldF9z dGF0dXNfZnJhbWUoKT8KCkphbgoKCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fXwpYZW4tZGV2ZWwgbWFpbGluZyBsaXN0Clhlbi1kZXZlbEBsaXN0cy54ZW5w cm9qZWN0Lm9yZwpodHRwczovL2xpc3RzLnhlbnByb2plY3Qub3JnL21haWxtYW4vbGlzdGluZm8v eGVuLWRldmVs