From mboxrd@z Thu Jan 1 00:00:00 1970 From: Oleksandr Andrushchenko Subject: Re: [Xen-devel] [PATCH v2] drm/xen-front: Make shmem backed display buffer coherent Date: Thu, 24 Jan 2019 14:34:03 +0000 Message-ID: References: <20190115140420.4652-1-andr2000@gmail.com> <20190116063002.jq3aas6ofhaogmyk@sirius.home.kraxel.org> <20190116063631.GA10881@infradead.org> <042fe794-dec6-6d9d-5b68-6f142790f5c7@epam.com> <20190117091815.GA7090@infradead.org> <1cfc5cb4-e481-5d71-29df-958db76fb681@epam.com> <2ed681b9-c8d4-ea27-6b8b-e399ed034bda@arm.com> <9e0130ee-0418-f68c-94cf-31a5566d929a@arm.com> <79ac0743-68bc-c2b7-d843-cf152c40d583@epam.com> <34a31bc8-96c6-2801-689c-3c4498b68ee8@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <34a31bc8-96c6-2801-689c-3c4498b68ee8@arm.com> Content-Language: en-US Content-ID: <3DE95D35E9F49B4BBCCA81EEB428EA3C@eurprd03.prod.outlook.com> Sender: linux-kernel-owner@vger.kernel.org To: Julien Grall , Christoph Hellwig Cc: "jgross@suse.com" , Oleksandr Andrushchenko , "linux-kernel@vger.kernel.org" , "dri-devel@lists.freedesktop.org" , "noralf@tronnes.org" , Gerd Hoffmann , "daniel.vetter@intel.com" , "xen-devel@lists.xenproject.org" , "boris.ostrovsky@oracle.com" , Stefano Stabellini , Robin Murphy List-Id: dri-devel@lists.freedesktop.org SGVsbG8sIEp1bGllbiENClNvcnJ5IGZvciB0aGUgbGF0ZSByZXBseSAtIGl0IHRvb2sgcXVpdGUg c29tZSB0aW1lIHRvIGNvbGxlY3QgdGhlIGRhdGEgDQpyZXF1ZXN0ZWQuDQoNCk9uIDEvMjIvMTkg MTo0NCBQTSwgSnVsaWVuIEdyYWxsIHdyb3RlOg0KPg0KPg0KPiBPbiAxLzIyLzE5IDEwOjI4IEFN LCBPbGVrc2FuZHIgQW5kcnVzaGNoZW5rbyB3cm90ZToNCj4+IEhlbGxvLCBKdWxpZW4hDQo+DQo+ IEhpLA0KPg0KPj4gT24gMS8yMS8xOSA3OjA5IFBNLCBKdWxpZW4gR3JhbGwgd3JvdGU6DQo+PiBX ZWxsLCBJIGRpZG4ndCBnZXQgdGhlIGF0dHJpYnV0ZXMgb2YgcGFnZXMgYXQgdGhlIGJhY2tlbmQg c2lkZSwgYnV0IElNTw0KPj4gdGhvc2UNCj4+IGRvIG5vdCBtYXR0ZXIgaW4gbXkgdXNlLWNhc2Ug KGZvciBzaW1wbGljaXR5IEkgYW0gbm90IHVzaW5nIA0KPj4gemVyby1jb3B5aW5nIGF0DQo+PiBi YWNrZW5kIHNpZGUpOg0KPg0KPiBUaGV5IGFyZSBhY3R1YWxseSBpbXBvcnRhbnQgbm8gbWF0dGVy IHdoYXQgaXMgeW91ciB1c2UgY2FzZS4gSWYgeW91IA0KPiBhY2Nlc3MgdGhlIHNhbWUgcGh5c2lj YWwgcGFnZSB3aXRoIGRpZmZlcmVudCBhdHRyaWJ1dGVzLCB0aGVuIHlvdSBhcmUgDQo+IGFza2lu ZyBmb3IgdHJvdWJsZS4NClNvLCB3ZSBoYXZlOg0KDQpEb21VOiBmcm9udGVuZCBzaWRlDQo9PT09 PT09PT09PT09PT09PT09PQ0KIVBURV9SRE9OTFkgKyBQVEVfUFhOICsgUFRFX1NIQVJFRCArIFBU RV9BRiArIFBURV9VWE4gKyANClBURV9BVFRSSU5EWChNVF9OT1JNQUwpDQoNCkRvbUQ6IGJhY2tl bmQgc2lkZQ0KPT09PT09PT09PT09PT09PT09PT0NClBURV9VU0VSICsgIVBURV9SRE9OTFkgKyBQ VEVfUFhOICsgUFRFX05HICsgUFRFX0NPTlQgKyBQVEVfVEFCTEVfQklUICsgDQpQVEVfVVhOICsg UFRFX0FUVFJJTkRYKE1UX05PUk1BTCkNCg0KIEZyb20gdGhlIGFib3ZlIGl0IHNlZW1zIHRoYXQg SSBkb24ndCB2aW9sYXRlIGNhY2hlZC9ub24tY2FjaGVkIA0KYWdyZWVtZW50IGhlcmUNCj4NCj4g VGhpcyBpcyB3aHkgWGVuIGltcG9zZXMgYWxsIHRoZSBwYWdlcyBzaGFyZWQgdG8gaGF2ZSB0aGVp ciBtZW1vcnkgDQo+IGF0dHJpYnV0ZXMgZm9sbG93aW5nIHNvbWUgcnVsZXMuIEFjdHVhbGx5LCBz cGVha2luZyB3aXRoIE1hcmsgUi4sIHdlIA0KPiBtYXkgd2FudCB0byB0aWdodCBhIGJpdCBtb3Jl IHRoZSBhdHRyaWJ1dGVzLg0KPg0KPj4NCj4+IDEuIEZyb250ZW5kIGRldmljZSBhbGxvY2F0ZXMg ZGlzcGxheSBidWZmZXIgcGFnZXMgd2hpY2ggY29tZSBmcm9tIHNobWVtDQo+PiBhbmQgaGF2ZSB0 aGVzZSBhdHRyaWJ1dGVzOg0KPj4gIVBURV9SRE9OTFkgKyBQVEVfUFhOICsgUFRFX1NIQVJFRCAr IFBURV9BRiArIFBURV9VWE4gKw0KPj4gUFRFX0FUVFJJTkRYKE1UX05PUk1BTCkNCj4NCj4gTXkg a25vd2xlZGdlIG9mIFhlbiBEUk0gaXMgaW5leGlzdGVudC4gSG93ZXZlciwgbG9va2luZyBhdCB0 aGUgY29kZSBpbiANCj4gNS4wLXJjMiwgSSBkb24ndCBzZWVtIHRvIGZpbmQgdGhlIHNhbWUgYXR0 cmlidXRlcy4gRm9yIGluc3RhbmNlIA0KPiB4ZW5fZHJtX2Zyb250X2dlbV9wcmltZV92bWFwIGFu ZCBnZW1fbW1hcF9vYmogYXJlIHVzaW5nIA0KPiBwZ3Byb3Rfd3JpdGVjb21iaW5lLiBTbyBpdCBs b29rcyBsaWtlLCB0aGUgbWFwcGluZyB3aWxsIGJlIA0KPiBub24tY2FjaGVhYmxlIG9uIEFybTY0 Lg0KPg0KPiBDYW4geW91IGV4cGxhaW4gaG93IHlvdSBjYW1lIHVwIHRvIHRoZXNlIGF0dHJpYnV0 ZXM/DQpwZ3Byb3Rfd3JpdGVjb21iaW5lIGlzIFBURV9BVFRSSU5EWChNVF9OT1JNQUxfTkMpLCBz byBpdCBzZWVtcyB0byBiZSANCmFwcGxpY2FibGUgaGVyZT8gWzFdDQo+DQo+Pg0KPj4gMi4gRnJv bnRlbmQgZ3JhbnRzIHJlZmVyZW5jZXMgdG8gdGhlc2UgcGFnZXMgYW5kIHNoYXJlcyB0aG9zZSB3 aXRoIHRoZQ0KPj4gYmFja2VuZA0KPj4NCj4+IDMuIEJhY2tlbmQgaXMgYSB1c2VyLXNwYWNlIGFw cGxpY2F0aW9uIChXZXN0b24gY2xpZW50KSwgc28gaXQgdXNlcw0KPj4gZ250ZGV2IGtlcm5lbA0K Pj4gZHJpdmVyIHRvIG1tYXAgdGhlIHBhZ2VzLiBUaGUgcGFnZXMsIHdoaWNoIGFyZSB1c2VkIGJ5 IGdudGRldiwgYXJlIHRob3NlDQo+PiBjb21pbmcNCj4+IGZyb20gdGhlIFhlbiBiYWxsb29uIGRy aXZlciBhbmQgSSBiZWxpZXZlIHRoZXkgYXJlIGFsbCBub3JtYWwgbWVtb3J5IGFuZA0KPj4gc2hv dWxkbid0IGJlIG5vbi1jYWNoZWQuDQo+Pg0KPj4gNC4gT25jZSB0aGUgZnJvbnRlbmQgc3RhcnRz IGRpc3BsYXlpbmcgaXQgZmxpcHMgdGhlIGJ1ZmZlcnMgYW5kIGJhY2tlbmQNCj4+IGRvZXMgKm1l bWNweSoNCj4+IGZyb20gdGhlIGZyb250ZW5kLWJhY2tlbmQgc2hhcmVkIGJ1ZmZlciBpbnRvIFdl c3RvbidzIGJ1ZmZlci4gVGhpcyBtZWFucw0KPj4gbm8gSFcgYXQgdGhlIGJhY2tlbmQgc2lkZSB0 b3VjaGVzIHRoZSBzaGFyZWQgYnVmZmVyLg0KPj4NCj4+IDUuIEkgY2FuIHNlZSBkaXN0b3J0ZWQg cGljdHVyZS4NCj4+DQo+PiBQcmV2aW91c2x5IEkgdXNlZCBzZXR1cCB3aXRoIHplcm8tY29weWlu Zywgc28gdGhlbiB0aGUgcGljdHVyZSBiZWNvbWVzDQo+PiBtb3JlIGNvbXBsaWNhdGVkDQo+PiBp biB0ZXJtcyBvZiBidWZmZXJzIGFuZCBob3cgdGhvc2UgdXNlZCBieSB0aGUgYmFja2VkLCBidXQg YW55d2F5cyBpdA0KPj4gc2VlbXMgdGhhdCB0aGUNCj4+IHZlcnkgYmFzaWMgc2NlbmFyaW8gd2l0 aCBtZW1vcnkgY29weWluZyBkb2Vzbid0IHdvcmsgZm9yIG1lLg0KPj4NCj4+IFVzaW5nIERNQSBB UEkgb24gZnJvbnRlbmQncyBzaWRlIGRvZXMgaGVscCAtIG5vIGFydGlmYWN0cyBhcmUgc2Vlbi4N Cj4+IFRoaXMgaXMgd2h5IEknbSB0aGlua2luZyB0aGF0IHRoaXMgaXMgcmVsYXRlZCB0byBmcm9u dGVuZC9rZXJuZWwgc2lkZQ0KPj4gcmF0aGVyIHRoZW4gdG8NCj4+IHRoZSBiYWNrZW5kIHNpZGUu IFRoaXMgaXMgd2h5IEknbSB0aGlua2luZyB0aGlzIGlzIHJlbGF0ZWQgdG8gY2FjaGVzIGFuZA0K Pj4gdHJ5aW5nIHRvIGZpZ3VyZQ0KPj4gb3V0IHdoYXQgY2FuIGJlIGRvbmUgaGVyZSBpbnN0ZWFk IG9mIHVzaW5nIERNQSBBUEkuDQo+DQo+IFdlIGFjdHVhbGx5IG5ldmVyIHJlcXVpcmVkIHRvIHVz ZSBjYWNoZSBmbHVzaCBpbiBvdGhlciBQViBwcm90b2NvbCwgc28gDQo+IEkgc3RpbGwgZG9uJ3Qg dW5kZXJzdGFuZCB3aHkgdGhlIFBWIERSTSBzaG91bGQgYmUgZGlmZmVyZW50IGhlcmUuDQpXZWxs LCB5b3UgYXJlIHJpZ2h0LiBCdXQgYXQgdGhlIHNhbWUgdGltZSBub3QgZmx1c2hpbmcgdGhlIGJ1 ZmZlciBtYWtlcyANCnRyb3VibGVzLA0Kc28gdGhpcyBpcyB3aHkgSSBhbSB0cnlpbmcgdG8gZmln dXJlIG91dCB3aGF0IGlzIHdyb25nIGhlcmUuDQo+DQo+IFRvIG1lLCBpdCBsb29rcyBsaWtlIHRo YXQgeW91IGFyZSBlaXRoZXIgbWlzc2luZyBzb21lIGJhcnJpZXJzDQpCYXJyaWVycyBmb3IgdGhl IGJ1ZmZlcj8gTm90IHN1cmUgd2hhdCB5b3UgbWVhbiBoZXJlLiBFdmVuIG1vcmUsIHdlIGhhdmUg DQphIHVzZSBjYXNlDQp3aGVuIHRoZSBidWZmZXIgaXMgbm90IHRvdWNoZWQgYnkgQ1BVIGluIERv bUQgYW5kIGlzIHNvbGVseSBvd25lZCBieSB0aGUgSFcuDQo+IG9yIHRoZSBtZW1vcnkgYXR0cmli dXRlcyBhcmUgbm90IGNvcnJlY3QuDQpQbGVhc2Ugc2VlIGFib3ZlIC0gSSBkbyBuZWVkIHlvdXIg YWR2aWNlIGhlcmUNCj4NCj4gQ2hlZXJzLA0KPg0KVGhhbmsgeW91IHZlcnkgbXVjaCBmb3IgeW91 ciB0aW1lLA0KT2xla3NhbmRyDQoNClsxXSANCmh0dHBzOi8vZWxpeGlyLmJvb3RsaW4uY29tL2xp bnV4L3Y1LjAtcmMyL3NvdXJjZS9hcmNoL2FybTY0L2luY2x1ZGUvYXNtL3BndGFibGUuaCNMNDE0