From mboxrd@z Thu Jan 1 00:00:00 1970 From: Norbert Manthey Subject: Re: [PATCH SpectreV1+L1TF v4 05/11] common/grant_table: block speculative out-of-bound accesses Date: Wed, 30 Jan 2019 09:06:47 +0100 Message-ID: <472ff562-44e1-9cfe-b75c-953525677a65@amazon.de> References: <1548244285-30813-1-git-send-email-nmanthey@amazon.de> <1548244285-30813-6-git-send-email-nmanthey@amazon.de> <5C486E0A02000078002106DD@prv1-mh.provo.novell.com> <1063c835-3944-48bf-b082-c80ce726a0e6@amazon.de> <5C4F1B300200007800211CAE@prv1-mh.provo.novell.com> <3eb3ecbb-47a7-386e-90ca-d49d8a75d3a6@amazon.de> <5C5020F0020000780014B7D1@prv1-mh.provo.novell.com> <5b33723c-81d5-c685-2554-54c53e1054be@amazon.de> <5C506D17020000780021210A@prv1-mh.provo.novell.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from us1-rack-dfw2.inumbo.com ([104.130.134.6]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1gokto-0002Bh-27 for xen-devel@lists.xenproject.org; Wed, 30 Jan 2019 08:07:08 +0000 In-Reply-To: <5C506D17020000780021210A@prv1-mh.provo.novell.com> Content-Language: en-US List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: Jan Beulich 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 T24gMS8yOS8xOSAxNjoxMSwgSmFuIEJldWxpY2ggd3JvdGU6Cj4+Pj4gT24gMjkuMDEuMTkgYXQg MTQ6NDcsIDxubWFudGhleUBhbWF6b24uZGU+IHdyb3RlOgo+PiBPbiAxLzI5LzE5IDEwOjQ2LCBK YW4gQmV1bGljaCB3cm90ZToKPj4+Pj4+IE5vcmJlcnQgTWFudGhleSA8bm1hbnRoZXlAYW1hem9u LmRlPiAwMS8yOS8xOSA5OjM1IEFNID4+Pgo+Pj4+IEkgYW0gYXdhcmUgdGhhdCBib3RoIHZlcnNp b24gdXNlIHRoZSBzYW1lIGJhc2UgYXJyYXksIGFuZCBhY2Nlc3MgaXQgdmlhCj4+Pj4gZGlmZmVy ZW50IG1hY3Jvcywgd2hpY2ggZXNzZW50aWFsbHkgcGFydGl0aW9uIHRoZSBhcnJheSBiYXNlZCBv biB0aGUKPj4+PiBzaXplIG9mIHRoZSByZXNwZWN0aXZlIHN0cnVjdC4gVGhlIHVuZGVybHlpbmcg cmF3IGFycmF5IGhhcyB0aGUgc2FtZQo+Pj4+IHNpemUgZm9yIGJvdGggdmVyc2lvbi4KPj4+IEFu ZCB0aGlzIGlzIHRoZSBwcm9ibGVtIGFmYWljczogSWYgYSBndWVzdCBoYXMgcmVxdWVzdGVkIGl0 cyBncmFudCB0YWJsZSB0bwo+Pj4gYmUgc2l6ZWQgYXMgYSBzaW5nbGUgcGFnZSwgdGhpcyBwYWdl IGNhbiBmaXQgdHdpY2UgYXMgbWFueSBlbnRyaWVzIGZvcgo+Pj4gdjEgdGhhbiBpdCBjYW4gZml0 IGZvciB2Mi4gSGVuY2UgdGhlIHYxIGdyYW50IHJlZmVyZW5jZSBwb2ludGluZyBhdCB0aGUgbGFz dAo+Pj4gZW50cnkgd291bGQgcG9pbnQgYXQgdGhlIGxhc3QgZW50cnkgaW4gdGhlIChub3QgbWFw cGVkKSBzZWNvbmQgcGFnZSBmb3IgdjIuCj4+IEkgbWlnaHQgdW5kZXJzdGFuZCB0aGUgY29kZSB3 cm9uZywgYnV0IGEgZ3Vlc3Qgd291bGQgYXNrIHRvIGdldCBhdCBtb3N0Cj4+IE4gZ3JhbnQgZnJh bWVzLCBhbmQgdGhpcyBudW1iZXIgY2Fubm90IGJlIGluY3JlYXNlZCBhZnRlcndhcmRzLCBpLmUu IHRoZQo+PiBmaWVsZCBndC0+bWF4X2dyYW50X2ZyYW1lcyBpcyB3cml0dGVuIGV4YWN0bHkgb25j ZS4gRnVydGhlcm1vcmUsIHRoZQo+PiB2b2lkKiogc2hhcmVkX3JhdyBhcnJheSBpcyBhbGxvY2F0 ZWQgYW5kIHdyaXR0ZW4gZXhhY3RseSBvbmNlIHdpdGgKPj4gc3VmZmljaWVudCBwb2ludGVycyBm b3IsIG5hbWVseSBndC0+bWF4X2dyYW50X2ZyYW1lcyBtYW55IGluIGZ1bmN0aW9uCj4+IGdyYW50 X3RhYmxlX2luaXQuIEhlbmNlLCBpbmRlcGVuZGVudGx5IG9mIHRoZSB2ZXJzaW9uIGJlaW5nIHVz ZWQsIGF0Cj4+IGxlYXN0IHRoZSBzaGFyZWRfcmF3IGFycmF5IGNhbm5vdCBiZSB1c2VkIGZvciBv dXQtb2YtYm91bmQgYWNjZXNzZXMKPj4gZHVyaW5nIHNwZWN1bGF0aW9uIHdpdGggbXkgYWJvdmUg ZXZhbHVhdGVfbm9zcGVjLgo+IEknbSBhZnJhaWQgSSdtIHN0aWxsIG5vdCBmb2xsb3dpbmc6IEEg Z2l2ZSBudW1iZXIgb2YgcGFnZXMgaXMgd29ydGgKPiB0d2ljZSBhcyBtYW55IGdyYW50cyBpbiB2 MSB0aGFuIGl0IGlzIGluIHYyLiBUaGVyZWZvcmUgYSB2MSBncmFudAo+IHJlZmVyZW5jZSB0byBh IGdyYW50IGVudHJ5IHRyYWNrZWQgaW4gdGhlIHNlY29uZCBoYWxmIG9mIHRoZQo+IGZpcnN0IHBh Z2Ugd291bGQgY2F1c2UgYSBzcGVjdWxhdGl2ZSBhY2Nlc3MgdG8gYW55d2hlcmUgaW4gdGhlCj4g c2Vjb25kIHBhZ2Ugd2hlbiB3cm9uZ2x5IGludGVycHJldGVkIGFzIGEgdjIgcmVmLgpBZ3JlZWQu IFNvIHlvdSB3YW50IG1lIHRvIGFkZCBhbm90aGVyIGxmZW5jZSB0byBtYWtlIHN1cmUgdGhlIHdy b25nCmludGVycHJldGF0aW9uIGRvZXMgbm90IGxlYWQgdG8gb3RoZXIgb3V0LW9mLWJvdW5kIGFj Y2Vzc2VzIGRvd24gdGhlCnNwZWN1bGF0aXZlIHdpbmRvdz8gSW4gbXkgb3BpbmlvbiwgdGhlIHYx IHZzIHYyIGNvZGUgZG9lcyBub3QgcmVzdWx0IGluCmFjdHVhbCBvdXQtb2YtYm91bmQgYWNjZXNz ZXMsIGV4Y2VwdCBmb3IgdGhlIE5VTEwgcGFnZSBjYXNlIGJlbG93LiBUbwptYWtlIHRoZSBQViBj YXNlIGhhcHB5LCBJIHdpbGwgYWRkIHRoZSBldmFsdWF0ZV9ub3NwZWMgbWFjcm8gZm9yIHRoZSB2 MQp2cyB2MiBjb25kaXRpb25hbHMgaW4gZnVuY3Rpb25zIHdpdGggZ3Vlc3QgY29udHJvbGxlZCBy ZWYgaW5kZXhlcy4KPgo+PiBUaGF0IGJlaW5nIHNhaWQsIGxldCdzIGFzc3VtZSB3ZSBoYXZlIGEg djEgZ3JhbnQgdGFibGUsIGFuZCBzcGVjdWxhdGlvbgo+PiB1c2VzIHRoZSB2MiBhY2Nlc3Nlcy4g SW4gdGhhdCBjYXNlLCBhbiBleGlzdGluZyBhbmQgemVyby1pbml0aWFsaXplZAo+PiBlbnRyeSBv ZiBzaGFyZWRfcmF3IG1pZ2h0IGJlIHVzZWQgaW4gdGhlIGZpcnN0IHBhcnQgb2YgdGhlCj4+IHNo YXJlZF9lbnRyeV92MiBtYWNybywgYW5kIGV2ZW4gaWYgdGhhdCBwb2ludGVyIHdvdWxkIGJlIG5v bi1OVUxMLCB0aGUKPj4gcGFnZSBpdCB3b3VsZCBwb2ludCB0byB3b3VsZCBoYXZlIGJlZW4gY2xl YXJlZCB3aGVuIGdyb3dpbmcgdGhlIGdyYW50Cj4+IHRhYmxlIGluIGZ1bmN0aW9uIGdudHRhYl9n cm93X3RhYmxlLgo+IE5vdCBpZiB0aGUgdjEgcmVmIGlzIG5vIHNtYWxsZXIgdGhhbiBoYWxmIHRo ZSBtYXhpbXVtIG51bWJlciBvZgo+IHYxIHJlZnMuIEluIHRoYXQgY2FzZSwgaWYgdGFrZW4gYXMg YSB2MiByZWYsIC0+c2hhcmVkX3Jhd1tdCj4gd291bGQgbmVlZCB0byBiZSB0d2ljZSBhcyBiaWcg dG8gY29wZSB3aXRoIHRoZSBsYXJnZXIgaW5kZXgKPiAocmVzdWx0aW5nIGZyb20gdGhlIHNtYWxs ZXIgZGl2aXNvciBpbiBzaGFyZWRfZW50cnlfdjIoKQo+IGNvbXBhcmVkIHRvIHNoYXJlZF9lbnRy eV92MSgpKSBpbiBvcmRlciB0byBub3QgYmUgb3ZlcnJ1bi4KPgo+IExldCdzIGxvb2sgYXQgYW4g ZXhhbXBsZTogZ3JlZiAyNTYgcG9pbnRzIGludG8gdGhlIG1pZGRsZSBvZgo+IHRoZSBmaXJzdCBw YWdlIHdoZW4gdXNpbmcgdjEgY2FsY3VsYXRpb25zLCBidXQgYXQgdGhlIHN0YXJ0Cj4gb2YgdGhl IHNlY29uZCBwYWdlIHdoZW4gdXNpbmcgdjIgY2FsY3VsYXRpb25zLiBIZW5jZSwgaWYgdGhlCj4g bWF4aW11bSBudW1iZXIgb2YgZ3JhbnQgZnJhbWVzIHdhcyAxLCB3ZSdkIG92ZXJydW4gdGhlCj4g YXJyYXksIGNvbnNpc3Rpbmcgb2YganVzdCBhIHNpbmdsZSBlbGVtZW50ICgyNTYgaXMgdmFsaWQg YXMgYQo+IHYxIGdyZWYgaW4gdGhhdCBjYXNlLCBidXQganVzdCBvdXQgb2YgYm91bmRzIGFzIGEg djIgb25lKS4KSWYgMjU2IGlzIGEgdmFsaWQgZ3JlZiwgdGhlbiB0aGUgc2hhcmVkX3JhdyBhcnJh eSBob2xkcyBzdWZmaWNpZW50Cnplcm8taW5pdGlhbGl6ZWQgZWxlbWVudHMgZm9yIHN1Y2ggYW4g YWNjZXNzLCBldmVuIHdpdGhvdXQgdGhlIGRpdmlzaW9uCm9wZXJhdG9yIHRoYXQgaXMgdXNlZCBp biB0aGUgc2hhcmVkX2VudHJ5X3YqKCkgbWFjcm9zLiBIZW5jZSwgbm8Kb3V0LW9mLWJvdW5kIGFj Y2VzcyB3aWxsIGhhcHBlbiBoZXJlLgo+Cj4gRnVydGhlcm1vcmUsIGV2ZW4gaWYgLT5zaGFyZWRf cmF3W10gaXRzZWxmIGNvdWxkIG5vdCBiZSBvdmVycnVuLAo+IGFuIGVudHJ5IG9mIGl0IGJlaW5n IE5VTEwgY291bGQgYmUgYSBwcm9ibGVtIHdpdGggUFYgZ3Vlc3RzLCB3aG8KPiBjYW4gaW5zdGFs bCBhIHRyYW5zbGF0aW9uIGZvciB0aGUgZmlyc3QgcGFnZSBvZiB0aGUgYWRkcmVzcyBzcGFjZSwK PiBhbmQgdGh1cyBwZXJoYXBzIHBhcnRseSBjb250cm9sIHN1YnNlcXVlbnQgc3BlY3VsYXRpdmUg ZXhlY3V0aW9uLgoKSSB1bmRlcnN0YW5kIHRoZSBjb25jZXJuLiBJIGFkZCB0aGUgZXZhbHVhdGVf bm9zcGVjIGFzIG1lbnRpb25lZCBhYm92ZS4KCkJlc3QsCk5vcmJlcnQKCj4KPiBKYW4KPgo+CgoK CgpBbWF6b24gRGV2ZWxvcG1lbnQgQ2VudGVyIEdlcm1hbnkgR21iSApLcmF1c2Vuc3RyLiAzOAox MDExNyBCZXJsaW4KR2VzY2hhZWZ0c2Z1ZWhyZXI6IENocmlzdGlhbiBTY2hsYWVnZXIsIFJhbGYg SGVyYnJpY2gKVXN0LUlEOiBERSAyODkgMjM3IDg3OQpFaW5nZXRyYWdlbiBhbSBBbXRzZ2VyaWNo dCBDaGFybG90dGVuYnVyZyBIUkIgMTQ5MTczIEIKCl9fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fClhlbi1kZXZlbCBtYWlsaW5nIGxpc3QKWGVuLWRldmVsQGxp c3RzLnhlbnByb2plY3Qub3JnCmh0dHBzOi8vbGlzdHMueGVucHJvamVjdC5vcmcvbWFpbG1hbi9s aXN0aW5mby94ZW4tZGV2ZWw=