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Wed, 06 May 2020 09:11:21 -0700 (PDT) Date: Wed, 6 May 2020 18:11:12 +0200 From: Jean-Philippe Brucker To: Tuan Phan Subject: Re: [PATCH] perf/smmuv3: Allow sharing MMIO registers with the SMMU driver Message-ID: <20200506161112.GA1197429@myrica> References: <20200421155745.19815-1-jean-philippe@linaro.org> <20200429072104.GA817954@myrica> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: Cc: Mark Rutland , Will Deacon , iommu@lists.linux-foundation.org, robin.murphy@arm.com, linux-arm-kernel@lists.infradead.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" T24gV2VkLCBBcHIgMjksIDIwMjAgYXQgMTE6MDE6MDVBTSAtMDcwMCwgVHVhbiBQaGFuIHdyb3Rl Ogo+IAo+IAo+ID4gT24gQXByIDI5LCAyMDIwLCBhdCAxMjoyMSBBTSwgSmVhbi1QaGlsaXBwZSBC cnVja2VyIDxqZWFuLXBoaWxpcHBlQGxpbmFyby5vcmc+IHdyb3RlOgo+ID4gCj4gPiBPbiBUdWUs IEFwciAyOCwgMjAyMCBhdCAxMToxMDowOUFNIC0wNzAwLCBUdWFuIFBoYW4gd3JvdGU6Cj4gPj4g SSB0ZXN0ZWQgdGhpcyBwYXRjaCBvbiBIVywgaG93ZXZlciBJIG5lZWQgdG8gYWRkIG9uZSBtb3Jl IGZvbGxvd2luZyBjaGFuZ2UgdG8gbWFrZSBpdCB3b3Jrcwo+ID4gCj4gPiBUaGFua3MgZm9yIHRl c3RpbmcuIEkgZG9uJ3QgdW5kZXJzdGFuZCB3aHkgeW91IG5lZWQgdGhlIGNoYW5nZSBiZWxvdwo+ ID4gdGhvdWdoLCBkbyB5b3Uga25vdyB3aGljaCBvdGhlciByZWdpb24gaXMgY29uZmxpY3Rpbmcg d2l0aCB0aGUgU01NVT8KPiA+IEl0IHNob3VsZCBiZSBkaXNwbGF5ZWQgaW4gdGhlIGVycm9yIG1l c3NhZ2UgYW5kIC9wcm9jL2lvbWVtLgo+ID4gCj4gPiBUaGFua3MsCj4gPiBKZWFuCj4gCj4gVGhl IGVycm9yIGlmIEkgZG9u4oCZdCBhcHBseSB0aGF0IHBhdGNoOgo+IFsgICAgNC45NDM2NTVdIGFy bS1zbW11LXYzIGFybS1zbW11LXYzLjAuYXV0bzogY2FuJ3QgcmVxdWVzdCByZWdpb24gZm9yIHJl c291cmNlIFttZW0gMHgzYmZmZTAwMDAwMDAtMHgzYmZmZTAwMWZmZmZdCj4gCj4gVGhlIG91dHB1 dCBvZiAvcHJvYy9pb21lbSBmb3IgdGhhdCByZWdpb246Cj4gM2JmZmUwMDAwMDAwLTNiZmZlMDAx ZmZmZiA6IGFybS1zbW11LXYzLjAuYXV0byAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg ICAgICAgICAgICAgICAgICAgICAgICAKPiAgIDNiZmZlMDAwMjAwMC0zYmZmZTAwMDJmZmYgOiBh cm0tc21tdS12My1wbWNnLjE3LmF1dG8gICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg ICAgICAgICAgICAgIAo+ICAgM2JmZmUwMDEyMDAwLTNiZmZlMDAxMmZmZiA6IGFybS1zbW11LXYz LXBtY2cuMTcuYXV0byAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg ICAgCgpUaGFua3MgZm9yIHRoaXMuIEl0IGxvb2tzIGxpa2UgdGhlIHJlZ2lvbnMgYXJlIGFkZGVk IHRvIHRoZSByZXNvdXJjZSB0cmVlCnR3aWNlLCB3aGVuIGJvb3Rpbmcgd2l0aCBBQ1BJOgoKV2hl biB0aGUgSU9SVCBjcmVhdGVzIHRoZSBwbGF0Zm9ybSBkZXZpY2VzLCBwbGF0Zm9ybV9kZXZpY2Vf YWRkKCkgaW5zZXJ0cwp0aGVzZSByZXNvdXJjZXMgYnV0IGRvZXNuJ3QgbWFyayB0aGVtIGJ1c3ku IEFzIEkgd2FzIHRlc3Rpbmcgd2l0aApkZXZpY2V0cmVlIEkgd2FzIG1pc3NpbmcgdGhpcyBzdGVw LgoKVGhlbiB0aGUgU01NVSBwcm9iZSBjYWxscyBkZXZtX2lvcmVtYXBfcmVzb3VyY2UoKSwgd2hp Y2ggdHJpZXMgdG8gcmVzZXJ2ZQp0aGUgcmVzb3VyY2VzIGFuZCBtYXJrIHRoZW0gYnVzeSB0aGlz IHRpbWUuIElmIHRoZXJlIG9ubHkgd2FzIHRoZSBub24tYnVzeQpTTU1VIHJlZ2lvbiBpbnNlcnRl ZCBhYm92ZSwgdGhlbiBfX3JlcXVlc3RfcmVnaW9uKCkgd291bGQgYWRkcyB0aGUKcmVzZXJ2ZWQg cmVnaW9uIGFzIGEgY2hpbGQuIEhvd2V2ZXIgc2luY2UgdGhlcmUgYXJlIHNtYWxsZXIgUE1DRyBy ZWdpb25zCmFzIGNoaWxkcmVuIG9mIHRoZSBTTU1VIHJlZ2lvbiwgX19yZXF1ZXN0X3JlZ2lvbigp IGZhaWxzLgoKQW5vdGhlciBpZGVhIGlzIHRvIGF2b2lkIG1hcHBpbmcgdGhlIElNUERFRiByZWdp c3RlcnMgaW4gdGhlIFNNTVUgZHJpdmVyLgpJIHRoaW5rIGl0J3MgbmljZXIsIGFuZCBJJ2xsIHBv c3QgdGhhdCBwYXRjaCBzaG9ydGx5LgoKVGhhbmtzLApKZWFuCgpfX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fXwppb21tdSBtYWlsaW5nIGxpc3QKaW9tbXVAbGlz dHMubGludXgtZm91bmRhdGlvbi5vcmcKaHR0cHM6Ly9saXN0cy5saW51eGZvdW5kYXRpb24ub3Jn L21haWxtYW4vbGlzdGluZm8vaW9tbXU=