From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Jan Beulich" Subject: Re: [PATCH SpectreV1+L1TF v4 05/11] common/grant_table: block speculative out-of-bound accesses Date: Wed, 23 Jan 2019 06:37:14 -0700 Message-ID: <5C486E0A02000078002106DD@prv1-mh.provo.novell.com> References: <1548244285-30813-1-git-send-email-nmanthey@amazon.de> <1548244285-30813-6-git-send-email-nmanthey@amazon.de> 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 1gmIiX-00050S-1N for xen-devel@lists.xenproject.org; Wed, 23 Jan 2019 13:37:21 +0000 In-Reply-To: <1548244285-30813-6-git-send-email-nmanthey@amazon.de> 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: Tim Deegan , Stefano Stabellini , Wei Liu , Konrad Rzeszutek Wilk , George Dunlap , Andrew Cooper , Ian Jackson , Dario Faggioli , Martin Pohlack , Julien Grall , David Woodhouse , "Martin Mazein(amazein)" , xen-devel , Julian Stecklina , Bjoern Doebel List-Id: xen-devel@lists.xenproject.org Pj4+IE9uIDIzLjAxLjE5IGF0IDEyOjUxLCA8bm1hbnRoZXlAYW1hem9uLmRlPiB3cm90ZToKPiBA QCAtMTI2OCw3ICsxMjcyLDggQEAgdW5tYXBfY29tbW9uKAo+ICAgICAgfQo+ICAKPiAgICAgIHNt cF9ybWIoKTsKPiAtICAgIG1hcCA9ICZtYXB0cmFja19lbnRyeShsZ3QsIG9wLT5oYW5kbGUpOwo+ ICsgICAgbWFwID0gJm1hcHRyYWNrX2VudHJ5KGxndCwgYXJyYXlfaW5kZXhfbm9zcGVjKG9wLT5o YW5kbGUsCj4gKyAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg ICAgbGd0LT5tYXB0cmFja19saW1pdCkpOwoKSXQgbWlnaHQgYmUgYmV0dGVyIHRvIG1vdmUgdGhp cyBpbnRvIG1hcHRyYWNrX2VudHJ5KCkgaXRzZWxmLCBvcgptYWtlIGEgbWFwdHJhY2tfZW50cnlf bm9zcGVjKCkgY2xvbmUgKGFzIHNldmVyYWwgYnV0IG5vdCBhbGwKdXNlcyBtYXkgaW5kZWVkIG5v dCBiZSBpbiBuZWVkIG9mIHRoZSBleHRyYSBwcm90ZWN0aW9uKS4gQXQKbGVhc3QgdGhlIG9uZXMg aW4gc3RlYWxfbWFwdHJhY2tfaGFuZGxlKCkgYW5kCnB1dF9tYXB0cmFja19oYW5kbGUoKSBhbHNv IGxvb2sgcG90ZW50aWFsbHkgc3VzcGljaW91cy4KCj4gQEAgLTIyMjMsNyArMjIzMSw4IEBAIGdu dHRhYl90cmFuc2ZlcigKPiAgICAgICAgICBva2F5ID0gZ250dGFiX3ByZXBhcmVfZm9yX3RyYW5z ZmVyKGUsIGQsIGdvcC5yZWYpOwo+ICAgICAgICAgIHNwaW5fbG9jaygmZS0+cGFnZV9hbGxvY19s b2NrKTsKPiAgCj4gLSAgICAgICAgaWYgKCB1bmxpa2VseSghb2theSkgfHwgdW5saWtlbHkoZS0+ aXNfZHlpbmcpICkKPiArICAgICAgICAvKiBNYWtlIHN1cmUgdGhpcyBjaGVjayBpcyBub3QgYnlw YXNzZWQgc3BlY3VsYXRpdmVseSAqLwo+ICsgICAgICAgIGlmICggZXZhbHVhdGVfbm9zcGVjKHVu bGlrZWx5KCFva2F5KSB8fCB1bmxpa2VseShlLT5pc19keWluZykpICkKPiAgICAgICAgICB7Cj4g ICAgICAgICAgICAgIGJvb2xfdCBkcm9wX2RvbV9yZWYgPSAhZG9tYWluX2FkanVzdF90b3RfcGFn ZXMoZSwgLTEpOwoKV2hhdCBpcyBpdCB0aGF0IG1ha2VzIHRoaXMgcGFydGljdWxhciBpZigpIGRp ZmZlcmVudCBmcm9tIG90aGVyCnN1cnJvdW5kaW5nIG9uZXM/IEluIHBhcnRpY3VsYXIgdGhlIHZl cnNpb24gZGVwZW5kZW50IGNvZGUgKGEgZmV3CmxpbmVzIGRvd24gZnJvbSBoZXJlIGFzIHdlbGwg YXMgZWxzZXdoZXJlKSBsb29rIHRvIGJlIGVhc2lseQpkaXZlcnRhYmxlIG9udG8gdGhlIHdyb25n IGJyYW5jaCwgdGhlbiBjYXVzaW5nIG91dCBvZiBib3VuZHMKc3BlY3VsYXRpdmUgYWNjZXNzZXMg ZHVlIHRvIHRoZSBkaWZmZXJlbnQgKHZlcnNpb24gZGVwZW5kZW50KQpzaGFyZWQgZW50cnkgc2l6 ZXMuCgo+IEBAIC0zMjE1LDYgKzMyMzAsMTAgQEAgc3dhcF9ncmFudF9yZWYoZ3JhbnRfcmVmX3Qg cmVmX2EsIGdyYW50X3JlZl90IHJlZl9iKQo+ICAgICAgaWYgKCByZWZfYSA9PSByZWZfYiApCj4g ICAgICAgICAgZ290byBvdXQ7Cj4gIAo+ICsgICAgLyogTWFrZSBzdXJlIHRoZSBhYm92ZSBjaGVj ayBpcyBub3QgYnlwYXNzZWQgc3BlY3VsYXRpdmVseSAqLwo+ICsgICAgcmVmX2EgPSBhcnJheV9p bmRleF9ub3NwZWMocmVmX2EsIG5yX2dyYW50X2VudHJpZXMoZC0+Z3JhbnRfdGFibGUpKTsKPiAr ICAgIHJlZl9iID0gYXJyYXlfaW5kZXhfbm9zcGVjKHJlZl9iLCBucl9ncmFudF9lbnRyaWVzKGQt PmdyYW50X3RhYmxlKSk7CgpJIHRoaW5rIHRoaXMgd2FudHMgdG8gbW92ZSB1cCBhaGVhZCBvZiB0 aGUgaWYoKSBpbiBjb250ZXh0LCBhbmQgdGhlCmNvbW1lbnQgYmUgY2hhbmdlZCB0byBwbHVyYWwu Cgo+IC0tLSBhL3hlbi9pbmNsdWRlL3hlbi9ub3NwZWMuaAo+ICsrKyBiL3hlbi9pbmNsdWRlL3hl bi9ub3NwZWMuaAo+IEBAIC04Nyw2ICs4NywxNSBAQCBzdGF0aWMgaW5saW5lIGJvb2wgbGZlbmNl X3RydWUodm9pZCkgeyByZXR1cm4gdHJ1ZTsgfQo+ICAjZGVmaW5lIGV2YWx1YXRlX25vc3BlYyhj b25kaXRpb24pICh7IGJvb2wgcmVzID0gKGNvbmRpdGlvbik7IHJtYigpOyByZXM7IAo+IH0pCj4g ICNlbmRpZgo+ICAKPiArLyoKPiArICogYWxsb3cgdG8gYmxvY2sgc3BlY3VsYXRpdmUgZXhlY3V0 aW9uIGluIGdlbmVyaWMgY29kZQo+ICsgKi8KCkNvbW1lbnQgc3R5bGUgYWdhaW4uCgo+ICsjaWZk ZWYgQ09ORklHX1g4Ngo+ICsjZGVmaW5lIGJsb2NrX3NwZWN1bGF0aW9uKCkgcm1iKCkKPiArI2Vs c2UKPiArI2RlZmluZSBibG9ja19zcGVjdWxhdGlvbigpCj4gKyNlbmRpZgoKV2h5IGRvZXMgdGhp cyBub3Qgc2ltcGx5IHJlc29sdmUgdG8gd2hhdCBjdXJyZW50bHkgaXMgbmFtZWQgbGZlbmNlX3Ry dWUoKQoocGVyaGFwcyB3aXRoIGEgY2FzdCB0byB2b2lkKT8gQW5kIHdoeSBkb2VzIHRoaXMgbm90 IGRlcGVuZCBvbiB0aGUKS2NvbmZpZyBzZXR0aW5nPwoKSmFuCgoKCl9fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fClhlbi1kZXZlbCBtYWlsaW5nIGxpc3QKWGVu LWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0dHBzOi8vbGlzdHMueGVucHJvamVjdC5vcmcv bWFpbG1hbi9saXN0aW5mby94ZW4tZGV2ZWw=