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Tsirkin" To: Jason Wang Subject: Re: [PATCH v2] vhost/vdpa: Add MSI translation tables to iommu for software-managed MSI Message-ID: <20230310045100-mutt-send-email-mst@kernel.org> References: <20230207120843.1580403-1-sunnanyong@huawei.com> <20230217051158-mutt-send-email-mst@kernel.org> <20230310034101-mutt-send-email-mst@kernel.org> MIME-Version: 1.0 In-Reply-To: X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Disposition: inline Cc: Cindy Lu , kvm@vger.kernel.org, Nanyong Sun , will@kernel.org, joro@8bytes.org, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, iommu@lists.linux.dev, Jason Gunthorpe , netdev@vger.kernel.org, robin.murphy@arm.com, wangrong68@huawei.com X-BeenThere: virtualization@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux virtualization List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: virtualization-bounces@lists.linux-foundation.org Sender: "Virtualization" T24gRnJpLCBNYXIgMTAsIDIwMjMgYXQgMDU6NDU6NDZQTSArMDgwMCwgSmFzb24gV2FuZyB3cm90 ZToKPiBPbiBGcmksIE1hciAxMCwgMjAyMyBhdCA0OjQx4oCvUE0gTWljaGFlbCBTLiBUc2lya2lu IDxtc3RAcmVkaGF0LmNvbT4gd3JvdGU6Cj4gPgo+ID4gT24gTW9uLCBGZWIgMjAsIDIwMjMgYXQg MTA6Mzc6MThBTSArMDgwMCwgSmFzb24gV2FuZyB3cm90ZToKPiA+ID4gT24gRnJpLCBGZWIgMTcs IDIwMjMgYXQgODo0MyBQTSBKYXNvbiBHdW50aG9ycGUgPGpnZ0BudmlkaWEuY29tPiB3cm90ZToK PiA+ID4gPgo+ID4gPiA+IE9uIEZyaSwgRmViIDE3LCAyMDIzIGF0IDA1OjEyOjI5QU0gLTA1MDAs IE1pY2hhZWwgUy4gVHNpcmtpbiB3cm90ZToKPiA+ID4gPiA+IE9uIFRodSwgRmViIDE2LCAyMDIz IGF0IDA4OjE0OjUwUE0gLTA0MDAsIEphc29uIEd1bnRob3JwZSB3cm90ZToKPiA+ID4gPiA+ID4g T24gVHVlLCBGZWIgMDcsIDIwMjMgYXQgMDg6MDg6NDNQTSArMDgwMCwgTmFueW9uZyBTdW4gd3Jv dGU6Cj4gPiA+ID4gPiA+ID4gRnJvbTogUm9uZyBXYW5nIDx3YW5ncm9uZzY4QGh1YXdlaS5jb20+ Cj4gPiA+ID4gPiA+ID4KPiA+ID4gPiA+ID4gPiBPbmNlIGVuYWJsZSBpb21tdSBkb21haW4gZm9y IG9uZSBkZXZpY2UsIHRoZSBNU0kKPiA+ID4gPiA+ID4gPiB0cmFuc2xhdGlvbiB0YWJsZXMgaGF2 ZSB0byBiZSB0aGVyZSBmb3Igc29mdHdhcmUtbWFuYWdlZCBNU0kuCj4gPiA+ID4gPiA+ID4gT3Ro ZXJ3aXNlLCBwbGF0Zm9ybSB3aXRoIHNvZnR3YXJlLW1hbmFnZWQgTVNJIHdpdGhvdXQgYW4KPiA+ ID4gPiA+ID4gPiBpcnEgYnlwYXNzIGZ1bmN0aW9uLCBjYW4gbm90IGdldCBhIGNvcnJlY3QgbWVt b3J5IHdyaXRlIGV2ZW50Cj4gPiA+ID4gPiA+ID4gZnJvbSBwY2llLCB3aWxsIG5vdCBnZXQgaXJx cy4KPiA+ID4gPiA+ID4gPiBUaGUgc29sdXRpb24gaXMgdG8gb2J0YWluIHRoZSBNU0kgcGh5IGJh c2UgYWRkcmVzcyBmcm9tCj4gPiA+ID4gPiA+ID4gaW9tbXUgcmVzZXJ2ZWQgcmVnaW9uLCBhbmQg c2V0IGl0IHRvIGlvbW11IE1TSSBjb29raWUsCj4gPiA+ID4gPiA+ID4gdGhlbiB0cmFuc2xhdGlv biB0YWJsZXMgd2lsbCBiZSBjcmVhdGVkIHdoaWxlIHJlcXVlc3QgaXJxLgo+ID4gPiA+ID4gPgo+ ID4gPiA+ID4gPiBQcm9iYWJseSBub3Qgd2hhdCBhbnlvbmUgd2FudHMgdG8gaGVhciwgYnV0IEkg d291bGQgcHJlZmVyIHdlIG5vdCBhZGQKPiA+ID4gPiA+ID4gbW9yZSB1c2VzIG9mIHRoaXMgc3R1 ZmYuIEl0IGxvb2tzIGxpa2Ugd2UgaGF2ZSB0byBnZXQgcmlkIG9mCj4gPiA+ID4gPiA+IGlvbW11 X2dldF9tc2lfY29va2llKCkgOlwKPiA+ID4gPiA+ID4KPiA+ID4gPiA+ID4gSSdkIGxpa2UgaXQg aWYgdmRwYSBjb3VsZCBtb3ZlIHRvIGlvbW11ZmQgbm90IGtlZXAgY29weWluZyBzdHVmZiBmcm9t Cj4gPiA+ID4gPiA+IGl0Li4KPiA+ID4gPiA+Cj4gPiA+ID4gPiBBYnNvbHV0ZWx5IGJ1dCB3aGVu IGlzIHRoYXQgaGFwcGVuaW5nPwo+ID4gPiA+Cj4gPiA+ID4gRG9uJ3Qga25vdywgSSB0aGluayBp dCBoYXMgdG8gY29tZSBmcm9tIHRoZSBWRFBBIG1haW50YWluZXJzLCBOaWNvbGluCj4gPiA+ID4g bWFkZSBzb21lIGRyYWZ0cyBidXQgd2Fzbid0IGFibGUgdG8gZ2V0IGl0IGJleW9uZCB0aGF0Lgo+ ID4gPgo+ID4gPiBDaW5keSAoY2NlZCkgd2lsbCBjYXJyeSBvbiB0aGUgd29yay4KPiA+ID4KPiA+ ID4gVGhhbmtzCj4gPgo+ID4gSG1tIGRpZG4ndCBzZWUgYW55dGhpbmcgeWV0LiBOYW55b25nIFN1 biBtYXliZSB5b3UgY2FuIHRha2UgYSBsb29rPwo+IAo+IEp1c3QgdG8gY2xhcmlmeSwgQ2luZHkg d2lsbCB3b3JrIG9uIHRoZSBpb21tdWZkIGNvbnZlcnNpb24gZm9yCj4gdmhvc3QtdkRQQSwgdGhl IGNoYW5nZXMgYXJlIG5vbi10cml2aWFsIGFuZCBtYXkgdGFrZSB0aW1lLiBCZWZvcmUgd2UKPiBh cmUgYWJsZSB0byBhY2hpZXZlIHRoYXQsICBJIHRoaW5rIHdlIHN0aWxsIG5lZWQgc29tZXRoaW5n IGxpa2UgdGhpcwo+IHBhdGNoIHRvIG1ha2UgdkRQQSB3b3JrIG9uIHNvZnR3YXJlIG1hbmFnZWQg TVNJIHBsYXRmb3Jtcy4KPiAKPiBNYXliZSBOYW55b25nIGNhbiBwb3N0IGEgbmV3IHZlcnNpb24g dGhhdCBhZGRyZXNzZXMgdGhlIGNvbW1lbnQgc28gZmFyPwo+IAo+IFRoYW5rcwoKTWF5YmUgYnV0 IGFuIGFjayBmcm9tIGlvbW11IG1haW50YWluZXJzIHdpbGwgYmUgbmVlZGVkIGFueXdheS4gTGV0 J3Mgc2VlCnRoYXQgdmVyc2lvbiwgbWF5YmUgc3BsaXQgdGhlIGV4cG9ydCB0byBhIHBhdGNoIGJ5 IGl0c2VsZiB0byBtYWtlIHRoZQpuZWVkIGZvciB0aGF0IGFjayBjbGVhci4KCgo+ID4KPiA+ID4g Pgo+ID4gPiA+IFBsZWFzZSBoYXZlIHBlb3BsZSB3aG8gbmVlZCBtb3JlIGlvbW11IHBsYXRmb3Jt IGVuYWJsZW1lbnQgdG8gcGljayBpdAo+ID4gPiA+IHVwIGluc3RlYWQgb2YgbWVyZ2luZyBoYWNr cyBsaWtlIHRoaXMuLgo+ID4gPiA+Cj4gPiA+ID4gV2UgYXJlIHZlcnkgY2xvc2UgdG8gaGF2aW5n IG5lc3RlZCB0cmFuc2xhdGlvbiBvbiBBUk0gc28gYW55b25lIHdobyBpcwo+ID4gPiA+IHNlcmlv dXMgYWJvdXQgVkRQQSBvbiBBUk0gaXMgZ29pbmcgdG8gbmVlZCBpb21tdWZkIGFueWhvdy4KPiA+ ID4gPgo+ID4gPiA+IEphc29uCj4gPiA+ID4KPiA+CgpfX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fXwpWaXJ0dWFsaXphdGlvbiBtYWlsaW5nIGxpc3QKVmlydHVh bGl6YXRpb25AbGlzdHMubGludXgtZm91bmRhdGlvbi5vcmcKaHR0cHM6Ly9saXN0cy5saW51eGZv dW5kYXRpb24ub3JnL21haWxtYW4vbGlzdGluZm8vdmlydHVhbGl6YXRpb24=