From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tvrtko Ursulin Subject: Re: [PATCH 3/3] drm/i915/userptr: Probe vma range before gup Date: Tue, 15 Jan 2019 10:40:24 +0000 Message-ID: References: <20190114211729.30352-1-chris@chris-wilson.co.uk> <20190114211729.30352-3-chris@chris-wilson.co.uk> <8a0cf258-af35-8a26-2ba9-8c6933fb6537@linux.intel.com> <154754825753.30063.4084449652142812295@skylake-alporthouse-com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8"; Format="flowed" Content-Transfer-Encoding: base64 Return-path: Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by gabe.freedesktop.org (Postfix) with ESMTPS id D297E6EC7A for ; Tue, 15 Jan 2019 10:40:24 +0000 (UTC) In-Reply-To: <154754825753.30063.4084449652142812295@skylake-alporthouse-com> Content-Language: en-US List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: Chris Wilson , intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org Ck9uIDE1LzAxLzIwMTkgMTA6MzAsIENocmlzIFdpbHNvbiB3cm90ZToKPiBRdW90aW5nIFR2cnRr byBVcnN1bGluICgyMDE5LTAxLTE1IDEwOjE5OjExKQo+Pgo+PiBPbiAxNC8wMS8yMDE5IDIxOjE3 LCBDaHJpcyBXaWxzb24gd3JvdGU6Cj4+PiBAQCAtNjIwLDQwICs2ODIsMjQgQEAgc3RhdGljIGlu dCBpOTE1X2dlbV91c2VycHRyX2dldF9wYWdlcyhzdHJ1Y3QgZHJtX2k5MTVfZ2VtX29iamVjdCAq b2JqKQo+Pj4gICAgICAgICAgICAgICAgICAgICAgICByZXR1cm4gLUVBR0FJTjsKPj4+ICAgICAg ICB9Cj4+PiAgICAKPj4+IC0gICAgIHB2ZWMgPSBOVUxMOwo+Pj4gLSAgICAgcGlubmVkID0gMDsK Pj4+ICsgICAgIGlmIChtbSA9PSBjdXJyZW50LT5tbSAmJiB0cnlfZmFzdF9ndXAob2JqKSA9PSAw KQo+Pj4gKyAgICAgICAgICAgICByZXR1cm4gMDsKPj4KPj4gSXMgdHJ5X2Zhc3RfZ3VwIGd1YXJh bnRlZWQgdG8gZmFpbCBvbiByYW5nZXMgcHJvYmVfcmFuZ2Ugd291bGQgaGF2ZQo+PiByZWplY3Rl ZD8KPiAKPiBJZiBhIHBhZ2UgaXNuJ3QgcHJlc2VudCwgaXQgd2lsbCBmYWlsLiBGb3Igb3VyIHB1 cnBvc2VzIHRoYXQgbWVhbnMKPiBmYXN0X2d1cCBmYWlscyBmb3IgR0dUVCBtbWFwcywgYXMgd2Vs bCBhcyBvdGhlciByYW5nZXMuCgpXaGF0IGlmIGl0IGhhcyBiZWVuIHByZS1mYXVsdGVkPwoKPj4+ IC0gICAgIGlmIChtbSA9PSBjdXJyZW50LT5tbSkgewo+Pj4gLSAgICAgICAgICAgICBwdmVjID0g a3ZtYWxsb2NfYXJyYXkobnVtX3BhZ2VzLCBzaXplb2Yoc3RydWN0IHBhZ2UgKiksCj4+PiAtICAg ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICBHRlBfS0VSTkVMIHwKPj4+IC0gICAgICAg ICAgICAgICAgICAgICAgICAgICAgICAgICAgIF9fR0ZQX05PUkVUUlkgfAo+Pj4gLSAgICAgICAg ICAgICAgICAgICAgICAgICAgICAgICAgICAgX19HRlBfTk9XQVJOKTsKPj4+IC0gICAgICAgICAg ICAgaWYgKHB2ZWMpIC8qIGRlZmVyIHRvIHdvcmtlciBpZiBtYWxsb2MgZmFpbHMgKi8KPj4+IC0g ICAgICAgICAgICAgICAgICAgICBwaW5uZWQgPSBfX2dldF91c2VyX3BhZ2VzX2Zhc3Qob2JqLT51 c2VycHRyLnB0ciwKPj4+IC0gICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg ICAgICAgICAgICAgbnVtX3BhZ2VzLAo+Pj4gLSAgICAgICAgICAgICAgICAgICAgICAgICAgICAg ICAgICAgICAgICAgICAgICAgICAgICAhaTkxNV9nZW1fb2JqZWN0X2lzX3JlYWRvbmx5KG9iaiks Cj4+PiAtICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg IHB2ZWMpOwo+Pj4gLSAgICAgfQo+Pj4gKyAgICAgLyogbG9ja2RlcCBkb2Vzbid0IHlldCBhdXRv bWF0aWNhbGx5IGFsbG93IG5lc3Rpbmcgb2YgcmVhZGVycyAqLwo+Pj4gKyAgICAgZG93bl9yZWFk X25lc3RlZCgmbW0tPm1tYXBfc2VtLCBTSU5HTEVfREVQVEhfTkVTVElORyk7Cj4+Cj4+IFdoeSBp cyBuZXN0aW5nIG5lZWRlZCAtIGNvbW1lbnQgbmVlZHMgdG8gZXhwbGFpbi4KPiAKPiBXZSBnZXQg Y2FsbGVkIHdpdGggbW0tPm1tYXBfc2VtIGhlbGQgZm9yIHJlYWRpbmcgb24gYSBmYXVsdCBwYXRo LCBhbmQKPiB3aXRob3V0IG1tLT5tbWFwX3NlbSBoZWxkIG90aGVyd2lzZS4gbG9ja2RlcCBkb2Vz bid0IGFsbG93IG5lc3Rpbmcgb2YKPiByZWFkZXJzLCBoZW5jZSB0aGUgY29tbWVudC4KClNvbWV0 aGluZyBsaWtlIHRoYXQgaW4gdGhlIGNvbW1lbnQgeWVzIHBsZWFzZS4gOikKClJlZ2FyZHMsCgpU dnJ0a28KX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KSW50 ZWwtZ2Z4IG1haWxpbmcgbGlzdApJbnRlbC1nZnhAbGlzdHMuZnJlZWRlc2t0b3Aub3JnCmh0dHBz Oi8vbGlzdHMuZnJlZWRlc2t0b3Aub3JnL21haWxtYW4vbGlzdGluZm8vaW50ZWwtZ2Z4Cg==