From mboxrd@z Thu Jan 1 00:00:00 1970 From: Julien Grall Subject: Re: [PATCH] xen/arm: p2m: Prevent deadlock when using memaccess Date: Tue, 6 Mar 2018 11:17:27 +0000 Message-ID: <5e22bffe-df0e-7bd7-d73b-c5ee4c644ce6@arm.com> References: <20180228152547.12700-1-julien.grall@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8"; Format="flowed" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: Content-Language: en-US List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: Stefano Stabellini Cc: proskurin@sec.in.tum.de, tamas@tklengyel.com, rcojocaru@bitdefender.com, andre.przywara@linaro.org, xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org SGkgU3RlZmFubywKCk9uIDAyLzAzLzE4IDIzOjQyLCBTdGVmYW5vIFN0YWJlbGxpbmkgd3JvdGU6 Cj4gT24gV2VkLCAyOCBGZWIgMjAxOCwgSnVsaWVuIEdyYWxsIHdyb3RlOgo+PiBDb21taXQgN2Q2 MjNiMzU4YTQgImFybS9tZW1fYWNjZXNzOiBBZGQgbG9uZy1kZXNjcmlwdG9yIGJhc2VkIGdwdCIK Pj4gYXNzdW1lZCB0aGUgcmVhZC13cml0ZSBsb2NrIGNhbiBiZSB0YWtlbiByZWN1cnNpdmVseS4g SG93ZXZlciwgdGhpcwo+PiBhc3N1bXB0aW9uIGlzIHdyb25nIGFuZCB3aWxsIGxlYWQgdG8gZGVh ZGxvY2sgd2hlbiB0aGUgbG9jayBpcwo+PiBjb250ZW5kZWQuCj4+Cj4+IFRvIGF2b2lkIHRoZSBu ZXN0ZWQgbG9jaywgcmV3b3JrIHRoZSBsb2NraW5nIGluIGdldF9wYWdlX2Zyb21fZ3ZhIGFuZAo+ PiBwMm1fbWVtX2FjY2Vzc19jaGVja19hbmRfZ2V0X3BhZ2UuIFRoZSBsYXR0ZXIgd2lsbCBub3cg YmUgY2FsbGVkIHdpdGhvdXQKPj4gdGhlIHAybSBsb2NrLiBUaGUgbmV3IGxvY2tpbmcgaW4gcDJt X21lbV9hY2NjZXNfY2hlY2tfYW5kX2dldF9wYWdlIHdpbGwKPj4gbm90IGNvdmVyIHRoZSB0cmFu c2xhdGlvbiBvZiB0aGUgVkEgdG8gYW4gSVBBLgo+Pgo+PiBUaGlzIGlzIGZpbmUgYmVjYXVzZSB3 ZSBjYW4ndCBwcm9taXNlIHRoYXQgdGhlIHN0YWdlLTEgcGFnZS10YWJsZSBoYXZlCj4+IGNoYW5n ZWQgYmVoaW5kIG91ciBiYWNrICh0aGV5IGFyZSB1bmRlciBndWVzdCBjb250cm9sKS4gTW9kaWZp Y2F0aW9uIGluCj4+IHRoZSBzdGFnZS0yIHBhZ2UtdGFibGUgY2FuIG5vdyBoYXBwZW4sIGJ1dCBJ IGNhbid0IGlzc3VlIGFueSBwb3RlbnRpYWwKPj4gaXNzdWUgaGVyZSBleGNlcHQgd2l0aCB0aGUg YnJlYWstYmVmb3JlLW1ha2Ugc2VxdWVuY2UgdXNlZCB3aGVuIHVwZGF0aW5nCj4+IHBhZ2UtdGFi bGUuIGd2YV90b19pcGEgbWF5IGZhaWwgaWYgdGhlIHNlcXVlbmNlIGlzIGV4ZWN1dGVkIGF0IHRo ZSBzYW1lCj4+IG9uIGFub3RoZXIgQ1BVLiBJbiB0aGF0IGNhc2Ugd2Ugd291bGQgZmFsbGJhY2sg aW4gdGhlIHNvZnR3YXJlIGxvb2t1cAo+PiBwYXRoLgo+Pgo+PiBTaWduZWQtb2ZmLWJ5OiBKdWxp ZW4gR3JhbGwgPGp1bGllbi5ncmFsbEBhcm0uY29tPgo+IAo+IAo+IEhpIEp1bGllbiwKPiAKPiBB dCBmaXJzdCBnbGFuY2UgdGhlIHBhdGNoIGxvb2tzIE9LLCBidXQgY291bGQgeW91IHBsZWFzZSBh ZGQgbW9yZQo+IGluZm9ybWF0aW9uIG9uIHRoZSByZWN1cnNpdmUgbG9jayBzZXF1ZW5jZSB0aGF0 IHRoaXMgcGF0Y2ggaXMgdHJ5aW5nIHRvCj4gc29sdmU/IFNwZWNpZmljYWxseSwgaG93IFhlbiBj YW4gZ2V0IGludG8gYSBzaXR1YXRpb24gd2hlcmUgaXQgdHJpZXMgdG8KPiBhY3F1aXJlIHRoZSBw Mm0gbG9jayB0d2ljZSByZWN1cnNpdmVseT8gSSByZWFsaXplIHRoZSBjb21tZW50IGF0IHRoZQo+ IGJvdHRvbSBzYXlzICJhY2Nlc3NfZ3Vlc3RfbWVtb3J5X2J5X2lwYSBpbiBndWVzdF93YWxrXyhz ZHxsZCkiIGJ1dCBJCj4gd291bGQgYXBwcmVjaWF0ZSBtb3JlIGRldGFpbHMuIFRoYW5rcyEKCkdv b2QgcG9pbnQuIEkgd2lsbCByZXNlbmQgaXQgd2l0aCBhbiB1cGRhdGVkIGNvbW1pdCBtZXNzYWdl LgoKQ2hlZXJzLAoKLS0gCkp1bGllbiBHcmFsbAoKX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX18KWGVuLWRldmVsIG1haWxpbmcgbGlzdApYZW4tZGV2ZWxAbGlz dHMueGVucHJvamVjdC5vcmcKaHR0cHM6Ly9saXN0cy54ZW5wcm9qZWN0Lm9yZy9tYWlsbWFuL2xp c3RpbmZvL3hlbi1kZXZlbA==