From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Hellwig Subject: Re: Upstream Dom0 DRM problems regarding swiotlb Date: Fri, 15 Feb 2019 08:42:01 -0800 Message-ID: <20190215164201.GA12704@infradead.org> References: <20190213191602.GC16558@char.us.oracle.com> <54ddc7c8-8ba3-bcd2-081e-af2a0ddc4c76@citrix.com> <8f05efab-4107-02ea-4bab-4759ac23d680@citrix.com> <20190214175705.GA21892@infradead.org> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Content-Disposition: inline In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: Michael Labriola Cc: Juergen Gross , Konrad Rzeszutek Wilk , Andrew Cooper , xen-devel@lists.xen.org, Christoph Hellwig , Paul Durrant , Jan Beulich List-Id: xen-devel@lists.xenproject.org T24gRnJpLCBGZWIgMTUsIDIwMTkgYXQgMTE6MDc6MjJBTSAtMDUwMCwgTWljaGFlbCBMYWJyaW9s YSB3cm90ZToKPiA+ID4gQnV0IHRoZSBsYXR0ZXIgdGV4dCBzZWVtcyB0byBhZ3JlZSB3aXRoIHRo YXQuICBTbyB3aGF0IGlzIHRoZSBhY3R1YWwKPiA+ID4gcHJvYmxlbSB0aGF0IHN0YXJ0ZWQgdGhp cyBkaXNjdXNzaW9uPwo+ID4gPgo+ID4KPiA+IFNlZSBodHRwczovL2xpc3RzLnhlbi5vcmcvYXJj aGl2ZXMvaHRtbC94ZW4tZGV2ZWwvMjAxOS0wMi90aHJlYWRzLmh0bWwjMDA4MTgKPiAKPiBJIGJl bGlldmUgdGhlIGFjdHVhbCBwcm9ibGVtIGlzIGVpdGhlcjoKPiAKPiAxKSBUaGUgcmFkZW9uL2Ft ZGdwdSBkcml2ZXJzIGFyZSBjYWxsaW5nIHR0bV9wb3B1bGF0ZV9hbmRfbWFwX3BhZ2VzKCkKPiB3 aGljaCAqc2hvdWxkKiB3b3JrIG9uIGEgWGVuIFBWIGhvc3QsIGJ1dCBkb2Vzbid0IGFuZCBuZWVk cyB0byBiZQo+IGZpeGVkLgo+IAo+IG9yCj4gCj4gMikgVGhlIHJhZGVvbi9hbWRncHUgZHJpdmVy cyBhcmUgY2FsbGluZyB0dG1fcG9wdWxhdGVfYW5kX21hcF9wYWdlcygpCj4gd2hpY2ggKmNhbm5v dCogd29yayBpbiBYZW4sIGFuZCB0aGV5IHNob3VsZCBnbyBiYWNrIHRvIGNhbGxpbmcKPiB0dG1f ZG1hX3BvcHVsYXRlKCkgaW4gdGhhdCBjYXNlLgo+IAo+IEknbSBoYXZpbmcgYSBoYXJkIHRpbWUg ZmlndXJpbmcgb3V0IHdoaWNoIG9mIHRob3NlIGlzIGNvcnJlY3QuCgpJIHRoaW5rIHRoZSBhbnN3 ZXIgaXMgbmVpdGhlciAxIG9yIDIgKG9yIGEgYml0IG9mIGJvdGgpLgoKdHRtX3BvcHVsYXRlX2Fu ZF9tYXBfcGFnZXMgdXNlcyBkbWFfbWFwX3BhZ2UgdG8gbWFwIEdQVSBtZW1vcnksCmFuZCBmcm9t IHdoYXQgSSBjYW4gdGVsbCBmcm9tIHlvdXIgcmVwb3J0IHBvdGVudGlhbGx5IGxvdHMgb2YgaXQu CgpTbyB0aGlzIGRvZXMgInByb3Blcmx5IiB1c2UgdGhlIERNQSBBUEkgZm9yIHNvbWUgYW1vdW50 IG9mICJwcm9wZXJseSIuClRoZSBwcm9ibGVtIGhlcmUgaXMgdGhhdCB0dG1fcG9wdWxhdGVfYW5k X21hcF9wYWdlcyBmaXJzdCBhbGxvY2F0ZXMKbWVtb3J5IGFuZCB0aGVuIG1hcHMgaXQgaW4gYSB3 YXkgd2hlcmUgaXQgYm91bmNlIGJ1ZmZlcnMgYSBsb3QsCmxlYWRpbmcgdG8gYSBzd2lvdGxiIGJ1 ZmZlciBleGF1c3Rpb24sIGFzIHNlZW4gaW4geW91ciByZXBvcnQuCgp0dG1fZG1hX3BvcHVsYXRl IGFsc28gc29ydCBvZiAicHJvcGVybHkiIHVzZXMgdGhlIERNQSBBUEkgaW4gdGhhdCBpdAp1c2Vz IHRoZSBkbWFfYWxsb2NfY29oZXJlbnQgYWxsb2NhdG9yLiAgVGhlIGJlbmVmaXQgb2YgdGhhdCBh bGxvY2F0b3IgaXMKdGhhdCBpcyBhbHdheXMgcmV0dXJucyBhZGRyZXNzYWJsZSBtZW1vcnkgd2l0 aG91dCBleGhhdXNpbmcgdGhlIHN3aW90bGIKYnVmZmVyLiAgVGhlIGRvd3NpZGUgb2YgdHRtX2Rt YV9wb3B1bGF0ZSAvIGRtYV9hbGxvY19jb2hlcmVudCBpcyB0aGF0Cm9uIGFyY2hpdGVjdHVyZXMg d2hlcmUgUENJZSBpcyBub3QgY2FjaGUgY29oZXJlbnQgaXQgcG9pbnRsZXNzbHkKdXAgb3RoZXIg cmVzb3VyY2VzLCBhcyBjb2hlcmVudCBETUEgbWVtb3J5IGNhbiBiZSBhIHZlcnkgZmluaXRlIHJl c291cmNlCnRoZXJlLgoKU28gZm9yIGEgc2hvcnQgdGVybSBmaXggZm9yY2luZyB0aGUgZG1hX2Fs bG9jX2NvaGVyZW50IHJvdXRlIG9uClhlbi94ODYgaXMgdGhlIHJpZ2h0IHRoaW5nLiAgT24gWGVu L2FybSBhbmQgWGVuL2FybTY0IGlzIG1pZ2h0IGFscmVhZHkKYmUgcHJvYmxlbWVhdGljIGR1ZSB0 byB0aGUgZXhwbGFuYXRpb24gYWJvdmUgdW5mb3J0dW5hdGVseS4KClRoZSByZWFsIGZpeCBpcyB0 byBmaW5hbGx5IGdldCBicm9hZGx5IGF2YWlsYWJsZSBub24tY29oZXJlbnQgZGV2aWNlCm1lbW9y eSBhbGxvY2F0b3IgaW50byBtYWlubGFpbmUgYW5kIHdpdGggdHRtX3BvcHVsYXRlX2FuZF9tYXBf cGFnZXMKdG8gdXNlIGl0LiAgTm90ZSB0aGF0IGZvciBub24tY29oZXJlbnQgZGV2aWNlcyBpdCBz ZWVtcyBsaWtlCnR0bV9wb3B1bGF0ZV9hbmRfbWFwX3BhZ2VzIGFsc28gc2VlbXMgdG8gbWlzcyBw cm9wZXIgb3duZXJzaGlwCm1hbmFnZW1lbnQgYnV0IHRoYXQgaXMgYW5vdGhlciBpc3N1ZS4KCk15 IHByb3Bvc2FsIGZvciBzdWNoIGFuIGFsbG9jYXRvciBoZXJlOgoKICAgaHR0cHM6Ly9sd24ubmV0 L0FydGljbGVzLzc3NDQyOS8KCnVuZm9ydHVuYXRlbHkgZG9lc24ndCBzZWVtIHRvIGdvIGFueXdo ZXJlIGFzIHRoZSBEUk0gZm9sa3MgZ2VuZXJhbGx5CnNlZW0gdG8gcHJlZmVyIGJvbHRpbmcgYmFu ZC1haWQgb250b3Agb2YgYmFuZC1haWQgaW5zdGVhZCBvZiBhY3R1YWxseQpmaXhpbmcgc3VjaCBw cm9ibGVtcy4KCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f Clhlbi1kZXZlbCBtYWlsaW5nIGxpc3QKWGVuLWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0 dHBzOi8vbGlzdHMueGVucHJvamVjdC5vcmcvbWFpbG1hbi9saXN0aW5mby94ZW4tZGV2ZWw=