From mboxrd@z Thu Jan 1 00:00:00 1970 From: Julien Grall Subject: Re: xen/arm and swiotlb-xen: possible data corruption Date: Fri, 3 Mar 2017 16:20:52 +0000 Message-ID: <0a29780a-f734-f537-994e-ac384a537d33@arm.com> References: <20170302083837.GB23726@toto> <20170302085332.GU9606@toto> <06e91a8f-f31d-b016-afdd-c6ef28800b87@arm.com> <029cca0d-35c3-63a4-3220-16baa571fc40@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8"; Format="flowed" Content-Transfer-Encoding: base64 Return-path: Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cjpwy-0004As-Mj for xen-devel@lists.xenproject.org; Fri, 03 Mar 2017 16:21:00 +0000 In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Stefano Stabellini Cc: "Edgar E. Iglesias" , "Edgar E. Iglesias" , nd@arm.com, xen-devel@lists.xenproject.org List-Id: xen-devel@lists.xenproject.org SGkgU3RlZmFubywKCk9uIDAzLzAzLzE3IDAwOjUzLCBTdGVmYW5vIFN0YWJlbGxpbmkgd3JvdGU6 Cj4gT24gVGh1LCAyIE1hciAyMDE3LCBKdWxpZW4gR3JhbGwgd3JvdGU6Cj4+IE9uIDAyLzAzLzIw MTcgMjI6MzksIFN0ZWZhbm8gU3RhYmVsbGluaSB3cm90ZToKPj4+IE9uIFRodSwgMiBNYXIgMjAx NywgSnVsaWVuIEdyYWxsIHdyb3RlOgo+Pj4+IEhpIFN0ZWZhbm8sCj4+Pj4KPj4+PiBPbiAwMi8w My8xNyAxOToxMiwgU3RlZmFubyBTdGFiZWxsaW5pIHdyb3RlOgo+Pj4+PiBPbiBUaHUsIDIgTWFy IDIwMTcsIEp1bGllbiBHcmFsbCB3cm90ZToKPj4+Pj4+IE9uIDAyLzAzLzE3IDA4OjUzLCBFZGdh ciBFLiBJZ2xlc2lhcyB3cm90ZToKPj4+Pj4+PiBPbiBUaHUsIE1hciAwMiwgMjAxNyBhdCAwOToz ODozN0FNICswMTAwLCBFZGdhciBFLiBJZ2xlc2lhcyB3cm90ZToKPj4+Pj4+Pj4gT24gV2VkLCBN YXIgMDEsIDIwMTcgYXQgMDU6MDU6MjFQTSAtMDgwMCwgU3RlZmFubyBTdGFiZWxsaW5pCj4+Pj4+ Pj4+IHdyb3RlOgo+Pj4+PiBKdWxpZW4sIGZyb20gbG9va2luZyBhdCB0aGUgdHdvIGRpZmZzLCB0 aGlzIGlzIHNpbXBsZXIgYW5kIG5pY2VyLCBidXQgaWYKPj4+Pj4geW91IGxvb2sgYXQgeGVuL2lu Y2x1ZGUvYXNtLWFybS9wYWdlLmgsIG15IHBhdGNoIG1hZGUKPj4+Pj4gY2xlYW5fZGNhY2hlX3Zh X3JhbmdlIGNvbnNpc3RlbnQgd2l0aCBpbnZhbGlkYXRlX2RjYWNoZV92YV9yYW5nZS4gRm9yCj4+ Pj4+IGNvbnNpc3RlbmN5LCBJIHdvdWxkIHByZWZlciB0byBkZWFsIHdpdGggdGhlIHR3byBmdW5j dGlvbnMgdGhlIHNhbWUgd2F5Lgo+Pj4+PiBBbHRob3VnaCBpdCBpcyBub3QgYSBzcGVjIHJlcXVp cmVtZW50LCBJIGFsc28gdGhpbmsgdGhhdCBpdCBpcyBhIGdvb2QKPj4+Pj4gaWRlYSB0byBpc3N1 ZSBjYWNoZSBmbHVzaGVzIGZyb20gY2FjaGVsaW5lIGFsaWduZWQgYWRkcmVzc2VzLCBsaWtlCj4+ Pj4+IGludmFsaWRhdGVfZGNhY2hlX3ZhX3JhbmdlIGRvZXMgYW5kIExpbnV4IGRvZXMsIHRvIG1h a2UgbW9yZSBvYnZpb3VzCj4+Pj4+IHdoYXQgaXMgZ29pbmcgb24uCj4+Pj4KPj4+PiBpbnZhbGlk X2RjYWNoZV92YV9yYW5nZSBpcyBzcGxpdCBiZWNhdXNlIHRoZSBjYWNoZSBpbnN0cnVjdGlvbiBk aWZmZXJzIGZvcgo+Pj4+IHRoZQo+Pj4+IHN0YXJ0IGFuZCBlbmQgaWYgdW5hbGlnbmVkLiBGb3Ig dGhlbSB5b3Ugd2FudCB0byB1c2UgY2xlYW4gJiBpbnZhbGlkYXRlCj4+Pj4gcmF0aGVyCj4+Pj4g dGhhbiBpbnZhbGlkYXRlLgo+Pj4+Cj4+Pj4gSWYgeW91IGxvb2sgYXQgdGhlIGltcGxlbWVudGF0 aW9uIG9mIG90aGVyIGNhY2hlIGhlbHBlcnMgaW4gTGludXggKHNlZQo+Pj4+IGRjYWNoZV9ieV9s aW5lX29wIGluIGFyY2gvYXJtNjQvaW5jbHVkZS9hc20vYXNzZW1ibGVyLmgpLCB0aGV5IHdpbGwg b25seQo+Pj4+IGFsaWduCj4+Pj4gc3RhcnQgJiBlbmQuCj4+Pgo+Pj4gSSBkb24ndCB0aGluayBz bywgdW5sZXNzIEkgYW0gcmVhZGluZyBkY2FjaGVfYnlfbGluZV9vcCB3cm9uZy4KPj4KPj4gMzQz ICAgICAgICAgLm1hY3JvIGRjYWNoZV9ieV9saW5lX29wIG9wLCBkb21haW4sIGthZGRyLCBzaXpl LCB0bXAxLCB0bXAyCj4+IDM0NCAgICAgICAgIGRjYWNoZV9saW5lX3NpemUgXHRtcDEsIFx0bXAy Cj4+IDM0NSAgICAgICAgIGFkZCAgICAgXHNpemUsIFxrYWRkciwgXHNpemUKPj4gMzQ2ICAgICAg ICAgc3ViICAgICBcdG1wMiwgXHRtcDEsICMxCj4+IDM0NyAgICAgICAgIGJpYyAgICAgXGthZGRy LCBca2FkZHIsIFx0bXAyCj4+IDM0OCA5OTk4Ogo+PiAzNDkgICAgICAgICAuaWYgICAgIChcb3Ag PT0gY3ZhdSB8fCBcb3AgPT0gY3ZhYykKPj4gMzUwIGFsdGVybmF0aXZlX2lmX25vdCBBUk02NF9X T1JLQVJPVU5EX0NMRUFOX0NBQ0hFCj4+IDM1MSAgICAgICAgIGRjICAgICAgXG9wLCBca2FkZHIK Pj4gMzUyIGFsdGVybmF0aXZlX2Vsc2UKPj4gMzUzICAgICAgICAgZGMgICAgICBjaXZhYywgXGth ZGRyCj4+IDM1NCBhbHRlcm5hdGl2ZV9lbmRpZgo+PiAzNTUgICAgICAgICAuZWxzZQo+PiAzNTYg ICAgICAgICBkYyAgICAgIFxvcCwgXGthZGRyCj4+IDM1NyAgICAgICAgIC5lbmRpZgo+PiAzNTgg ICAgICAgICBhZGQgICAgIFxrYWRkciwgXGthZGRyLCBcdG1wMQo+PiAzNTkgICAgICAgICBjbXAg ICAgIFxrYWRkciwgXHNpemUKPj4gMzYwICAgICAgICAgYi5sbyAgICA5OTk4Ygo+PiAzNjEgICAg ICAgICBkc2IgICAgIFxkb21haW4KPj4gMzYyICAgICAgICAgLmVuZG0KPj4gMzYzCj4+Cj4+IEl0 IGhhcyBvbmx5IG9uZSBjYWNoZSBpbnN0cnVjdGlvbiBpbiB0aGUgcmVzdWx0aW5nIGFzc2VtYmx5 IGJlY2F1c2UgaXQgaGFzCj4+IC5pZi8uZWxzZSBhc3NlbWJseSBkaXJlY3RpdmVzLgo+Cj4gWWVz LCBidXQgaXQgZG9lcyBub3Qgb25seSBhbGlnbiBzdGFydCBhbmQgZW5kLCBhbGwgY2FjaGUgaW5z dHJ1Y3Rpb25zCj4gYXJlIGNhbGxlZCBvbiBhbGlnbmVkIGFkZHJlc3NlcywgcmlnaHQ/CgpJIGRv bid0IHRoaW5rIHNvLiBUaGUgaW5zdHJ1Y3Rpb24gImJpYyAgICAgXGthZGRyLCBca2FkZHIsIFx0 bXAyIiB3aWxsIAptYWtlIHN1cmUgdGhlIHN0YXJ0IGFkZHJlc3MgaXMgYWxpZ25lZCB0byBhIGNh Y2hlIGxpbmUgc2l6ZS4KClRoZSBDIHZlcnNpb24gb2YgdGhlIGFzc2VtYmx5IGNvZGUgaXMgZXhh Y3RseSB3aGF0IHlvdSB3cm90ZSBvbiB0aGUgCnByZXZpb3VzIGUtbWFpbDoKCiAgICBlbmQgPSBw ICsgc2l6ZTsKICAgIHAgPSAodm9pZCAqKUFMSUdOKCh1aW50cHRyX3QpcCwgY2FjaGVsaW5lX2J5 dGVzKTsKCkNoZWVycywKCi0tIApKdWxpZW4gR3JhbGwKCl9fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fClhlbi1kZXZlbCBtYWlsaW5nIGxpc3QKWGVuLWRldmVs QGxpc3RzLnhlbi5vcmcKaHR0cHM6Ly9saXN0cy54ZW4ub3JnL3hlbi1kZXZlbAo=