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Fri, 24 Jun 2022 18:32:00 +0000 (UTC) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id E9BE31042; Fri, 24 Jun 2022 11:31:59 -0700 (PDT) Received: from [10.57.84.111] (unknown [10.57.84.111]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 862573F792; Fri, 24 Jun 2022 11:31:53 -0700 (PDT) Message-ID: Date: Fri, 24 Jun 2022 19:31:47 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; rv:91.0) Gecko/20100101 Thunderbird/91.10.0 Subject: Re: [PATCH v2 3/5] vfio/iommu_type1: Remove the domain->ops comparison Content-Language: en-GB To: Jason Gunthorpe References: <20220616000304.23890-1-nicolinc@nvidia.com> <20220616000304.23890-4-nicolinc@nvidia.com> <6e1280c5-4b22-ebb3-3912-6c72bc169982@arm.com> <20220624131611.GM4147@nvidia.com> From: Robin Murphy In-Reply-To: <20220624131611.GM4147@nvidia.com> Cc: "cohuck@redhat.com" , "jordan@cosmicpenguin.net" , "linux-tegra@vger.kernel.org" , "thierry.reding@gmail.com" , "will@kernel.org" , "alyssa@rosenzweig.io" , "jean-philippe@linaro.org" , "saiprakash.ranjan@codeaurora.org" , "kvm@vger.kernel.org" , "zhang.lyra@gmail.com" , "iommu@lists.linux-foundation.org" , "jonathanh@nvidia.com" , "linux-arm-kernel@lists.infradead.org" , "yangyingliang@huawei.com" , "orsonzhai@gmail.com" , "gerald.schaefer@linux.ibm.com" , "Tian, Kevin" , "linux-arm-msm@vger.kernel.org" , "christophe.jaillet@wanadoo.fr" , "matthias.bgg@gmail.com" , "tglx@linutronix.de" , "virtualization@lists.linux-foundation.org" , "isaacm@codeaurora.org" , "linux-s390@vger.kernel.org" , "marcan@marcan.st" , "alex.williamson@redhat.com" , "linux-kernel@vger.kernel.org" , "baolin.wang7@gmail.com" , "linux-mediatek@lists.infradead.org" , "dwmw2@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-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" T24gMjAyMi0wNi0yNCAxNDoxNiwgSmFzb24gR3VudGhvcnBlIHdyb3RlOgo+IE9uIFdlZCwgSnVu IDIyLCAyMDIyIGF0IDA4OjU0OjQ1QU0gKzAxMDAsIFJvYmluIE11cnBoeSB3cm90ZToKPj4gT24g MjAyMi0wNi0xNiAyMzoyMywgTmljb2xpbiBDaGVuIHdyb3RlOgo+Pj4gT24gVGh1LCBKdW4gMTYs IDIwMjIgYXQgMDY6NDA6MTRBTSArMDAwMCwgVGlhbiwgS2V2aW4gd3JvdGU6Cj4+Pgo+Pj4+PiBU aGUgZG9tYWluLT5vcHMgdmFsaWRhdGlvbiB3YXMgYWRkZWQsIGFzIGEgcHJlY2F1dGlvbiwgZm9y IG1peGVkLWRyaXZlcgo+Pj4+PiBzeXN0ZW1zLiBIb3dldmVyLCBhdCB0aGlzIG1vbWVudCBvbmx5 IG9uZSBpb21tdSBkcml2ZXIgaXMgcG9zc2libGUuIFNvCj4+Pj4+IHJlbW92ZSBpdC4KPj4+Pgo+ Pj4+IEl0J3MgdHJ1ZSBvbiBhIHBoeXNpY2FsIHBsYXRmb3JtLiBCdXQgSSdtIG5vdCBzdXJlIHdo ZXRoZXIgYSB2aXJ0dWFsIHBsYXRmb3JtCj4+Pj4gaXMgYWxsb3dlZCB0byBpbmNsdWRlIG11bHRp cGxlIGUuZy4gb25lIHZpcnRpby1pb21tdSBhbG9uZ3NpZGUgYSB2aXJ0dWFsIFZULWQKPj4+PiBv ciBhIHZpcnR1YWwgc21tdS4gSXQgbWlnaHQgYmUgY2xlYXJlciB0byBjbGFpbSB0aGF0IChhcyBS b2JpbiBwb2ludGVkIG91dCkKPj4+PiB0aGVyZSBpcyBwbGVudHkgbW9yZSBzaWduaWZpY2FudCBw cm9ibGVtcyB0aGFuIHRoaXMgdG8gc29sdmUgaW5zdGVhZCBvZiBzaW1wbHkKPj4+PiBzYXlpbmcg dGhhdCBvbmx5IG9uZSBpb21tdSBkcml2ZXIgaXMgcG9zc2libGUgaWYgd2UgZG9uJ3QgaGF2ZSBl eHBsaWNpdCBjb2RlCj4+Pj4gdG8gcmVqZWN0IHN1Y2ggY29uZmlndXJhdGlvbi4g8J+Yigo+Pj4K Pj4+IFdpbGwgZWRpdCB0aGlzIHBhcnQuIFRoYW5rcyEKPj4KPj4gT2gsIHBoeXNpY2FsIHBsYXRm b3JtcyB3aXRoIG1peGVkIElPTU1VcyBkZWZpbml0ZWx5IGV4aXN0IGFscmVhZHkuIFRoZSBtYWlu Cj4+IHBvaW50IGlzIHRoYXQgd2hpbGUgYnVzX3NldF9pb21tdSBzdGlsbCBleGlzdHMsIHRoZSBj b3JlIGNvZGUgZWZmZWN0aXZlbHkKPj4gKmRvZXMqIHByZXZlbnQgbXVsdGlwbGUgZHJpdmVycyBm cm9tIHJlZ2lzdGVyaW5nIC0gZXZlbiBpbiBlbXVsYXRlZCBjYXNlcwo+PiBsaWtlIHRoZSBleGFt cGxlIGFib3ZlLCB2aXJ0aW8taW9tbXUgYW5kIFZULWQgd291bGQgYm90aCB0cnkgdG8KPj4gYnVz X3NldF9pb21tdSgmcGNpX2J1c190eXBlKSwgYW5kIG9uZSBvZiB0aGVtIHdpbGwgbG9zZS4gVGhl IGFzcGVjdCB3aGljaAo+PiBtaWdodCB3YXJyYW50IGNsYXJpZmljYXRpb24gaXMgdGhhdCB0aGVy ZSdzIG5vIGNvbWJpbmF0aW9uIG9mIHN1cHBvcnRlZAo+PiBkcml2ZXJzIHdoaWNoIGNsYWltIG5v bi1vdmVybGFwcGluZyBidXNlcyAqYW5kKiBjb3VsZCBhcHBlYXIgaW4gdGhlIHNhbWUKPj4gc3lz dGVtIC0gZXZlbiBpZiB5b3UgdHJpZWQgdG8gY29udHJpdmUgc29tZXRoaW5nIGJ5IGVtdWxhdGlu Zywgc2F5LCBWVC1kCj4+IChQQ0kpIGFsb25nc2lkZSByb2NrY2hpcC1pb21tdSAocGxhdGZvcm0p LCB5b3UgY291bGQgc3RpbGwgb25seSBkZXNjcmliZSBvbmUKPj4gb3IgdGhlIG90aGVyIGR1ZSB0 byBBQ1BJIHZzLiBEZXZpY2V0cmVlLgo+IAo+IFJpZ2h0LCBhbmQgdGhhdCBpcyBzdGlsbCBzb21l dGhpbmcgd2UgbmVlZCB0byBwcm90ZWN0IGFnYWluc3Qgd2l0aAo+IHRoaXMgb3BzIGNoZWNrLiBW RklPIGlzIG5vdCBjaGVja2luZyB0aGF0IHRoZSBidXMncyBhcmUgdGhlIHNhbWUKPiBiZWZvcmUg YXR0ZW1wdGluZyB0byByZS11c2UgYSBkb21haW4uCj4gCj4gU28gaXQgaXMgYWN0dWFsbHkgZnVu Y3Rpb25hbCBhbmQgZG9lcyBwcm90ZWN0IGFnYWluc3Qgc3lzdGVtcyB3aXRoCj4gbXVsdGlwbGUg aW9tbXUgZHJpdmVycyBvbiBkaWZmZXJlbnQgYnVzc2VzLgoKQnV0IGFzIGFib3ZlLCB3aGljaCBz eXN0ZW1zICphcmUqIHRob3NlPyBFdmVyeXRoaW5nIHRoYXQncyBvbiBteSByYWRhciAKd291bGQg aGF2ZSBkcml2ZXJzIGFsbCBjb21wZXRpbmcgZm9yIHRoZSBwbGF0Zm9ybSBidXMgLSBJbnRlbCBh bmQgczM5MCAKYXJlIHNvbWV3aGF0IHRoZSBvZGQgb25lcyBvdXQgaW4gdGhhdCByZXNwZWN0LCBi dXQgYXJlIGFsc28gbm9uLWlzc3VlcyAKYXMgYWJvdmUuIEZXSVcgbXkgaW9tbXUvYnVzIGRldiBi cmFuY2ggaGFzIGdvdCBhcyBmYXIgYXMgdGhlIGZpbmFsIGJ1cyAKb3BzIHJlbW92YWwgYW5kIGFs bG93aW5nIG11bHRpcGxlIGRyaXZlciByZWdpc3RyYXRpb25zLCBhbmQgYmVmb3JlIGl0IAphbGxv d3MgdGhhdCwgaXQgZG9lcyBub3cgaGF2ZSB0aGUgY29tbW9uIGF0dGFjaCBjaGVjayB0aGF0IEkg c2tldGNoZWQgCm91dCBpbiB0aGUgcHJldmlvdXMgZGlzY3Vzc2lvbiBvZiB0aGlzLgoKSXQncyBw cm9iYWJseSBhbHNvIG5vdGV3b3J0aHkgdGhhdCBkb21haW4tPm9wcyBpcyBubyBsb25nZXIgdGhl IHNhbWUgCmRvbWFpbi0+b3BzIHRoYXQgdGhpcyBjb2RlIHdhcyB3cml0dGVuIHRvIGNoZWNrLCBh bmQgbWF5IG5vdyBiZSAKZGlmZmVyZW50IGJldHdlZW4gZG9tYWlucyBmcm9tIHRoZSBzYW1lIGRy aXZlci4KClRoYW5rcywKUm9iaW4uCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fCmlvbW11IG1haWxpbmcgbGlzdAppb21tdUBsaXN0cy5saW51eC1mb3VuZGF0 aW9uLm9yZwpodHRwczovL2xpc3RzLmxpbnV4Zm91bmRhdGlvbi5vcmcvbWFpbG1hbi9saXN0aW5m by9pb21tdQ==