From mboxrd@z Thu Jan 1 00:00:00 1970 From: Julien Grall Subject: Re: xen/arm and swiotlb-xen: possible data corruption Date: Thu, 2 Mar 2017 17:56:54 +0000 Message-ID: <06e91a8f-f31d-b016-afdd-c6ef28800b87@arm.com> References: <20170302083837.GB23726@toto> <20170302085332.GU9606@toto> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8"; Format="flowed" Content-Transfer-Encoding: base64 Return-path: Received: from mail6.bemta6.messagelabs.com ([193.109.254.103]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cjUyK-00063U-SD for xen-devel@lists.xenproject.org; Thu, 02 Mar 2017 17:57:00 +0000 In-Reply-To: <20170302085332.GU9606@toto> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: "Edgar E. Iglesias" , "Edgar E. Iglesias" Cc: xen-devel@lists.xenproject.org, nd@arm.com, Stefano Stabellini List-Id: xen-devel@lists.xenproject.org SGkgRWRnYXIsCgpPbiAwMi8wMy8xNyAwODo1MywgRWRnYXIgRS4gSWdsZXNpYXMgd3JvdGU6Cj4g T24gVGh1LCBNYXIgMDIsIDIwMTcgYXQgMDk6Mzg6MzdBTSArMDEwMCwgRWRnYXIgRS4gSWdsZXNp YXMgd3JvdGU6Cj4+IE9uIFdlZCwgTWFyIDAxLCAyMDE3IGF0IDA1OjA1OjIxUE0gLTA4MDAsIFN0 ZWZhbm8gU3RhYmVsbGluaSB3cm90ZToKPj4+IEhpIGFsbCwKPj4+Cj4+PiBFZGdhciByZXBvcnRl ZCBhIGRhdGEgY29ycnVwdGlvbiBvbiBuZXR3b3JrIHBhY2tldHMgaW4gZG9tMCB3aGVuIHRoZQo+ Pj4gc3dpb3RsYi14ZW4gaXMgaW4gdXNlLiBIZSBhbHNvIHJlcG9ydGVkIHRoYXQgdGhlIGZvbGxv d2luZyBwYXRjaCAiZml4ZXMiCj4+PiB0aGUgcHJvYmxlbSBmb3IgaGltOgo+Pj4KPj4+ICBzdGF0 aWMgdm9pZCBfX3hlbl9kbWFfcGFnZV9jcHVfdG9fZGV2KHN0cnVjdCBkZXZpY2UgKmh3ZGV2LCBk bWFfYWRkcl90IGhhbmRsZSwKPj4+ICAgICAgICAgICAgICAgICBzaXplX3Qgc2l6ZSwgZW51bSBk bWFfZGF0YV9kaXJlY3Rpb24gZGlyKQo+Pj4gIHsKPj4+IC0gICAgICAgZG1hX2NhY2hlX21haW50 KGhhbmRsZSAmIFBBR0VfTUFTSywgaGFuZGxlICYgflBBR0VfTUFTSywgc2l6ZSwgZGlyLCBETUFf TUFQKTsKPj4+ICsgICAgICAgcHJpbnRrKCIlczogYWRkcj0lbHggc2l6ZT0lemRcbiIsIF9fZnVu Y19fLCBoYW5kbGUsIHNpemUpOwo+Pj4gKyAgICAgICBkbWFfY2FjaGVfbWFpbnQoaGFuZGxlICYg UEFHRV9NQVNLLCBoYW5kbGUgJiB+UEFHRV9NQVNLLCBzaXplICsgNjQsIGRpciwgRE1BX01BUCk7 Cj4+Pgo+Pj4gSSBhbSB0aGlua2luZyB0aGF0IHRoZSBwcm9ibGVtIGhhcyBzb21ldGhpbmcgdG8g ZG8gd2l0aCBjYWNoZWxpbmUKPj4+IGFsaWdubWVudCBvbiB0aGUgWGVuIHNpZGUKPj4+ICh4ZW4v Y29tbW9uL2dyYW50X3RhYmxlLmM6X19nbnR0YWJfY2FjaGVfZmx1c2gpLgo+Pj4KPj4+IElmIG9w ID09IEdOVFRBQl9DQUNIRV9JTlZBTCwgd2UgY2FsbCBpbnZhbGlkYXRlX2RjYWNoZV92YV9yYW5n ZTsgaWYgb3AKPj4+ID09IEdOVFRBQl9DQUNIRV9DTEVBTiwgd2UgY2FsbCBjbGVhbl9kY2FjaGVf dmFfcmFuZ2UgaW5zdGVhZC4gVGhlCj4+PiBwYXJhbWV0ZXIsIHYsIGNvdWxkIGJlIG5vbi1jYWNo ZWxpbmUgYWxpZ25lZC4KPj4+Cj4+PiBpbnZhbGlkYXRlX2RjYWNoZV92YV9yYW5nZSBpcyBjYXBh YmxlIG9mIGhhbmRsaW5nIGEgbm90IGFsaWduZWQgYWRkcmVzcywKPj4+IHdoaWxlIGNsZWFuX2Rj YWNoZV92YV9yYW5nZSBkb2VzIG5vdC4KPj4+Cj4+PiBFZGdhciwgZG9lcyB0aGUgYXBwZW5kZWQg cGF0Y2ggZml4IHRoZSBwcm9ibGVtIGZvciB5b3U/Cj4+Cj4+Cj4+IFRoYW5rcyBTdGVmYW5vLAo+ Pgo+PiBUaGlzIGRvZXMgaW5kZWVkIGZpeCB0aGUgaXNzdWUgZm9yIG1lLgo+Cj4KPiBIaSBhZ2Fp biwKPgo+IExvb2tpbmcgYXQgdGhlIGNvZGUsIHRoZSBwcm9ibGVtIGhlcmUgaXMgdGhhdCB3ZSBt YXkgZmx1c2ggb25lIGNhY2hlIGxpbmUKPiBsZXNzIHRoYW4gZXhwZWN0ZWQuCj4KPiBUaGlzIHNt YWxsZXIgcGF0Y2ggZml4ZXMgaXQgZm9yIG1lIHRvbzoKPiBkaWZmIC0tZ2l0IGEveGVuL2luY2x1 ZGUvYXNtLWFybS9wYWdlLmggYi94ZW4vaW5jbHVkZS9hc20tYXJtL3BhZ2UuaAo+IGluZGV4IGM0 OTJkNmQuLmZhMWI0ZGQgMTAwNjQ0Cj4gLS0tIGEveGVuL2luY2x1ZGUvYXNtLWFybS9wYWdlLmgK PiArKysgYi94ZW4vaW5jbHVkZS9hc20tYXJtL3BhZ2UuaAo+IEBAIC0zMjUsNyArMzI1LDkgQEAg c3RhdGljIGlubGluZSBpbnQgY2xlYW5fZGNhY2hlX3ZhX3JhbmdlKGNvbnN0IHZvaWQgKnAsIHVu c2lnbmVkIGxvbmcgc2l6ZSkKPiAgewo+ICAgICAgY29uc3Qgdm9pZCAqZW5kOwo+ICAgICAgZHNi KHN5KTsgICAgICAgICAgIC8qIFNvIHRoZSBDUFUgaXNzdWVzIGFsbCB3cml0ZXMgdG8gdGhlIHJh bmdlICovCj4gLSAgICBmb3IgKCBlbmQgPSBwICsgc2l6ZTsgcCA8IGVuZDsgcCArPSBjYWNoZWxp bmVfYnl0ZXMgKQo+ICsKPiArICAgIGVuZCA9ICh2b2lkICopUk9VTkRVUCgodWludHB0cl90KXAg KyBzaXplLCBjYWNoZWxpbmVfYnl0ZXMpOwo+ICsgICAgZm9yICggOyBwIDwgZW5kOyBwICs9IGNh Y2hlbGluZV9ieXRlcyApCj4gICAgICAgICAgYXNtIHZvbGF0aWxlIChfX2NsZWFuX2RjYWNoZV9v bmUoMCkgOiA6ICJyIiAocCkpOwo+ICAgICAgZHNiKHN5KTsgICAgICAgICAgIC8qIFNvIHdlIGtu b3cgdGhlIGZsdXNoZXMgaGFwcGVuIGJlZm9yZSBjb250aW51aW5nICovCj4gICAgICAvKiBBUk0g Y2FsbGVycyBhc3N1bWUgdGhhdCBkY2FjaGVfKiBmdW5jdGlvbnMgY2Fubm90IGZhaWwuICovCj4K Pgo+IEFueXdheSwgSSdtIE9LIHdpdGggZWl0aGVyIGZpeC4KCkkgd291bGQgcHJlZmVyIHlvdXIg dmVyc2lvbiBjb21wYXJlIHRvIFN0ZWZhbm8ncyBvbmUuCgpDaGVlcnMsCgotLSAKSnVsaWVuIEdy YWxsCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpYZW4t ZGV2ZWwgbWFpbGluZyBsaXN0Clhlbi1kZXZlbEBsaXN0cy54ZW4ub3JnCmh0dHBzOi8vbGlzdHMu eGVuLm9yZy94ZW4tZGV2ZWwK