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[34.140.232.180]) by smtp.gmail.com with ESMTPSA id bf7-20020a0560001cc700b003439d2a5f99sm29773568wrb.55.2024.04.29.08.30.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 29 Apr 2024 08:30:57 -0700 (PDT) Date: Mon, 29 Apr 2024 15:30:53 +0000 From: Mostafa Saleh To: Jason Gunthorpe Cc: iommu@lists.linux.dev, Joerg Roedel , linux-arm-kernel@lists.infradead.org, Robin Murphy , Will Deacon , Eric Auger , Moritz Fischer , Moritz Fischer , Michael Shavit , Nicolin Chen , patches@lists.linux.dev, Shameerali Kolothum Thodi Subject: Re: [PATCH v7 2/9] iommu/arm-smmu-v3: Make CD programming use arm_smmu_write_entry() Message-ID: References: <0-v7-cb149db3a320+3b5-smmuv3_newapi_p2_jgg@nvidia.com> <2-v7-cb149db3a320+3b5-smmuv3_newapi_p2_jgg@nvidia.com> <20240422132954.GB49823@nvidia.com> <20240429142905.GF941030@nvidia.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20240429142905.GF941030@nvidia.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240429_083108_316530_B6CBB22C X-CRM114-Status: GOOD ( 29.41 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org T24gTW9uLCBBcHIgMjksIDIwMjQgYXQgMTE6Mjk6MDVBTSAtMDMwMCwgSmFzb24gR3VudGhvcnBl IHdyb3RlOgo+IE9uIFNhdCwgQXByIDI3LCAyMDI0IGF0IDEwOjA4OjU3UE0gKzAwMDAsIE1vc3Rh ZmEgU2FsZWggd3JvdGU6Cj4gPiA+IFRoZSBpc3N1ZSBpcyB0aGUgb2xkIGxvZ2ljIGNvbnN0cnVj dHMgdGhlIG5ldyBDRCBieSBtYW5pcHVsYXRpbmcgdGhlCj4gPiA+IGV4aXN0aW5nIENEIGluIHZh cmlvdXMgd2F5cyAiaW4gcGxhY2UiIHRoYXQgZW5kcyB1cCBjcmVhdGluZyBDRHMgdGhhdAo+ID4g PiBkb24ndCBtZWV0IHRoZSByZXF1aXJlbWVudHMgZm9yIHRoZSBuZXcgcHJvZ3JhbW1lci4gRm9y IGluc3RhbmNlIEVQRDAKPiA+ID4gd2lsbCBiZSBzZXQgYW5kIHRoZSBUVEIwIHdpbGwgYWxzbyBi ZSBsZWZ0IHByb2dyYW1tZWQuCj4gPiA+IAo+ID4gCj4gPiBJIHNlZSwgYnV0IHdoYXQgSSBkb27i gJl0IHVuZGVyc3RhbmQgaXMgd2h5IGRvZXNuJ3QgdGhlIGZ1bmN0aW9uIGNvbnN0cnVjdAo+ID4g dGhlIENEIGNvcnJlY3RseSwgYXMgZnJvbQo+IAo+IFdoeT8gQmVjYXVzZSBpdCBuZXZlciBoYWQg dG8gYmVmb3JlLiBJdCBtYWRlIG1pbmltYWwgZWRpdHMgdG8gbWluaW1pemUKPiB0aGUgY29kZS4K CkkgdW5kZXJzdGFuZCwgbXkgcG9pbnQgd2FzIHdoeSBkb27igJl0IHdlIGludHJvZHVjZSBhIG5l dyBsb2dpYyB0byBjb25zdHJ1Y3QgaXQKY29ycmVjdGx5LCBpbnN0ZWFkIG9mIGhhY2tpbmcgdGhl IG9sZCBvbmUsIGFzIGl0IGlzIG11Y2ggZWFzaWVyIHRvIHJlYXNvbgphYm91dCAoYXQgbGVhc3Qg ZnJvbSBteSBwb2ludCBvZiB2aWV3KQoKPiAKPiA+IAl9IGVsc2UgaWYgKGNkID09ICZxdWlldF9j ZCkgeyAvKiAoNCkgKi8KPiA+IAkJaWYgKCEoc21tdS0+ZmVhdHVyZXMgJiBBUk1fU01NVV9GRUFU X1NUQUxMX0ZPUkNFKSkKPiA+IAkJCXZhbCAmPSB+KENUWERFU0NfQ0RfMF9TIHwgQ1RYREVTQ19D RF8wX1IpOwo+ID4gCQl2YWwgfD0gQ1RYREVTQ19DRF8wX1RDUl9FUEQwOwo+ID4gCQkvLyBwb3B1 bGF0ZSB0aGUgcmVzdCBvZiB0aGUgQ0QgY29ycmVjdGx5IGhlcmUuCj4gPiAJfQo+IAo+IFdoYXQg eW91IGFyZSBhc2tpbmcgZm9yIGlzIHRoaXM6Cj4gCj4gICAgICAgICBjZF9saXZlID0gISEodmFs ICYgQ1RYREVTQ19DRF8wX1YpOwo+ICAKPiAgICAgICAgIGlmICghY2QpIHsgLyogKDUpICovCj4g KyAgICAgICAgICAgICAgIG1lbXNldChjZHB0ciwgMCwgc2l6ZW9mKCpjZHB0cikpOwo+ICAgICAg ICAgICAgICAgICB2YWwgPSAwOwo+ICAgICAgICAgfSBlbHNlIGlmIChjZCA9PSAmcXVpZXRfY2Qp IHsgLyogKDQpICovCj4gKyAgICAgICAgICAgICAgIHZhbCAmPSB+KENUWERFU0NfQ0RfMF9UQ1Jf VDBTWiB8IENUWERFU0NfQ0RfMF9UQ1JfVEcwIHwKPiArICAgICAgICAgICAgICAgICAgICAgICAg Q1RYREVTQ19DRF8wX1RDUl9JUkdOMCB8IENUWERFU0NfQ0RfMF9UQ1JfT1JHTjAgfAo+ICsgICAg ICAgICAgICAgICAgICAgICAgICBDVFhERVNDX0NEXzBfVENSX1NIMCk7Cj4gICAgICAgICAgICAg ICAgIGlmICghKHNtbXUtPmZlYXR1cmVzICYgQVJNX1NNTVVfRkVBVF9TVEFMTF9GT1JDRSkpCj4g ICAgICAgICAgICAgICAgICAgICAgICAgdmFsICY9IH4oQ1RYREVTQ19DRF8wX1MgfCBDVFhERVND X0NEXzBfUik7Cj4gICAgICAgICAgICAgICAgIHZhbCB8PSBDVFhERVNDX0NEXzBfVENSX0VQRDA7 Cj4gKyAgICAgICAgICAgICAgIGNkcHRyLT5kYXRhWzFdICY9IH5jcHVfdG9fbGU2NChDVFhERVND X0NEXzFfVFRCMF9NQVNLKTsKPiAgICAgICAgIH0gZWxzZSBpZiAoY2RfbGl2ZSkgeyAvKiAoMykg Ki8KPiAgICAgICAgICAgICAgICAgdmFsICY9IH5DVFhERVNDX0NEXzBfQVNJRDsKPiAgICAgICAg ICAgICAgICAgdmFsIHw9IEZJRUxEX1BSRVAoQ1RYREVTQ19DRF8wX0FTSUQsIGNkLT5hc2lkKTsK PiAKPiBJIHRoaW5rLi4gSSd2ZSBiZWVuIHN0YXJpbmcgYXQgdGhpcyBhIHdoaWxlIG5vdyBhbmQg SSAqdGhpbmsqIGl0Cj4gY292ZXJzIGFsbCB0aGUgY2FzZXMgYW5kIHdlIHdvbid0IGhpdCB0aGUg V0FSTl9PTj8KPiAKClRoYXTigJlzIHNpbWlsYXIgdG8gaG93IEkgaW1hZ2luZWQgaXQuCgo+IFNv IHN1cmUsIGxldHMgZG8gaXQgdGhhdCB3YXksIHRoZSBjb2RlIGlzIGFsbCBkZWxldGVkIGFueWhv dyAuLgo+IAoKSSBhZ3JlZSwgaWYgaXQncyBkZWxldGVkIGFueXdheSB3ZSBzaG91bGRuJ3QgcHV0 IG11Y2ggdGltZSwgSSBoYXZlbid0Cmxvb2tlZCBhdCB0aGUgU1ZBIHBhdGNoIHlldC4KCj4gPiBB cyBJICBkb27igJl0IHRoaW5rIHRoZSByaWdodCBhcHByb2FjaCBpcyB0byBwb3B1bGF0ZSB0aGUg Q0QgaW5jb3JyZWN0bHkKPiA+IGFuZCB0aGVuIGNsZWFyIHRoZSBwYXJ0cyBub3QgbmVlZGVkIGZv ciBFUEQwLgo+IAo+IEl0IGlzIHZlcnkgZWFzeSB0byBzZWUgdGhhdCBzdWNoIGEgc2ltcGxlIGFs Z29yaXRobSB3aWxsIG5vdCB0cmlnZ2VyCj4gdGhlIFdBUk5fT04uIFRoZSBhYm92ZSBpcyBzb21l d2hhdCB0cmlja2llci4KPiAKPiA+IEFsc28sIFRUQjAgaXMgaWdub3JlZCBhbnl3YXkgaW4gdGhh dCBjYXNlLCBubz8KPiAKPiBPbmx5IGJ5IEhXLCB0aGVyZSBpcyBhIHByb3RlY3RpdmUgV0FSTl9P TiB0aGF0IHdpbGwgdHJpZ2dlciBpbiB0aGUKPiBwcm9ncmFtbWVyLCB0aGF0IGlzIHdoYXQgdGhp cyBpcyB0cnlpbmcgdG8gYXZvaWQuIEZvciBiaXNlY3Rpb24uCgpNYWtlcyBzZW5zZS4KClRoYW5r cywKTW9zdGFmYQo+IEphc29uCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fXwpsaW51eC1hcm0ta2VybmVsIG1haWxpbmcgbGlzdApsaW51eC1hcm0ta2VybmVs QGxpc3RzLmluZnJhZGVhZC5vcmcKaHR0cDovL2xpc3RzLmluZnJhZGVhZC5vcmcvbWFpbG1hbi9s aXN0aW5mby9saW51eC1hcm0ta2VybmVsCg==