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([2001:df0:0:200c:75aa:d6ca:4354:6033]) by smtp.gmail.com with ESMTPSA id b8-20020a170902650800b00168a651316csm9770467plk.270.2022.06.28.14.38.02 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 28 Jun 2022 14:38:09 -0700 (PDT) Message-ID: Date: Wed, 29 Jun 2022 09:38:00 +1200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.9.1 Subject: Re: [PATCH v2 3/3] arch/*/: remove CONFIG_VIRT_TO_BUS Content-Language: en-US To: Arnd Bergmann References: <20220617125750.728590-1-arnd@kernel.org> <20220617125750.728590-4-arnd@kernel.org> <6ba86afe-bf9f-1aca-7af1-d0d348d75ffc@gmail.com> <9289fd82-285c-035f-5355-4d70ce4f87b0@gmail.com> From: Michael Schmitz In-Reply-To: Cc: Linux-Arch , scsi , Michael Ellerman , Christoph Hellwig , Geert Uytterhoeven , Jakub Kicinski , Arnd Bergmann , Denis Efremov , linux-m68k , John Paul Adrian Glaubitz , Khalid Aziz , Miquel van Smoorenburg , Parisc List , Robin Murphy , Matt Wang , Linux Kernel Mailing List , Mark Salyzyn , Linux IOMMU , alpha , linuxppc-dev , "Maciej W . Rozycki" 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" SGkgQXJuZCwKCk9uIDI4LzA2LzIyIDE5OjA4LCBBcm5kIEJlcmdtYW5uIHdyb3RlOgo+IE9uIFR1 ZSwgSnVuIDI4LCAyMDIyIGF0IDU6MjUgQU0gTWljaGFlbCBTY2htaXR6IDxzY2htaXR6bWljQGdt YWlsLmNvbT4gd3JvdGU6Cj4+IEFtIDI4LjA2LjIwMjIgdW0gMDk6MTIgc2NocmllYiBNaWNoYWVs IFNjaG1pdHo6Cj4+Cj4+IExlYXZpbmcgdGhlIGJvdW5jZSBidWZmZXIgaGFuZGxpbmcgaW4gcGxh Y2UsIGFuZCB0YWtpbmcgYSBmZXcgb3RoZXIKPj4gbGliZXJ0aWVzIC0gdGhpcyBpcyB3aGF0IGNv bnZlcnRpbmcgdGhlIGVhc2llc3QgY2FzZSAoYTMwMDAgU0NTSSkgbWlnaHQKPj4gbG9vayBsaWtl LiBBbnkgb2J2aW91cyBtaXN0YWtlcz8gVGhlIG12bWUxNDcgZHJpdmVyIHdvdWxkIGJlIHZlcnkK Pj4gc2ltaWxhciB0byBoYW5kbGUgKGFmdGVyIGNvbnZlcnNpb24gdG8gYSBwbGF0Zm9ybSBkZXZp Y2UpLgo+Pgo+PiBUaGUgZHJpdmVyIGFsbG9jYXRlcyBib3VuY2UgYnVmZmVycyB1c2luZyBrbWFs bG9jIGlmIGl0IGhpdHMgYW4KPj4gdW5hbGlnbmVkIGRhdGEgYnVmZmVyIC0gY2FuIHN1Y2ggYnVm ZmVycyBzdGlsbCBldmVuIGhhcHBlbiB0aGVzZSBkYXlzPwo+PiBJZiBJIHVuZGVyc3RhbmQgZG1h X21hcF9zaW5nbGUoKSBjb3JyZWN0bHksIHRoZSByZXN1bHRpbmcgZG1hIGhhbmRsZQo+PiB3b3Vs ZCBiZSBlcXVhbGx5IG1pc2FsaWduZWQ/Cj4+Cj4+IFRvIGFsbG9jYXRlIGEgYm91bmNlIGJ1ZmZl ciwgd291bGQgaXQgYmUgT0sgdG8gdXNlIGRtYV9hbGxvY19jb2hlcmVudCgpCj4+IGV2ZW4gdGhv dWdoIEFGQUlVIG1lbW9yeSB1c2VkIGZvciBETUEgYnVmZmVycyBnZW5lcmFsbHkgaXNuJ3QgY29u c2lzdGVudAo+PiBvbiBtNjhrPwo+IEkgdGhpbmsgaXQgbWFrZXMgc2Vuc2UgdG8gc2tpcCB0aGUg Ym91bmNlIGJ1ZmZlcmluZyBhcyB5b3UgZG8gaGVyZToKPiB0aGUgb25seSBzdGFuZGFyZGl6ZWQg d2F5IHdlIGhhdmUgZm9yIGludGVncmF0aW5nIHRoYXQgcGFydCBpcyB0bwo+IHVzZSB0aGUgc3dp b3RsYiBpbmZyYXN0cnVjdHVyZSwgYnV0IGFzIHlvdSBtZW50aW9uZWQgZWFybGllciB0aGF0Cj4g cGFydCBpcyBwcm9iYWJseSB0b28gcmVzb3VyY2UtaGVhdnkgaGVyZSBmb3IgQW1pZ2EuCk9LLCBs ZWF2aW5nIHRoZSBvbGQgY3VzdG9tIGxvZ2ljIGluIHBsYWNlIGFsbG93cyB0byBjb252ZXJ0IHRo ZSAyNCBiaXQgCkRNQSBkcml2ZXJzIG1vcmUgZWFzaWx5Lgo+Cj4gSSBzZWUgdHdvIG90aGVyIHBy b2JsZW1zIHdpdGggeW91ciBwYXRjaCB0aG91Z2g6Cj4KPiBhKSB5b3Ugc3RpbGwgZHVwbGljYXRl IHRoZSBjYWNoZSBoYW5kbGluZzogdGhlIGNhY2hlX2NsZWFyKCkvY2FjaGVfcHVzaCgpCj4gaXMg c3VwcG9zZWQgdG8gYWxyZWFkeSBiZSBkb25lIGJ5IGRtYV9tYXBfc2luZ2xlKCkgd2hlbiB0aGUg ZGV2aWNlCj4gaXMgbm90IGNhY2hlLWNvaGVyZW50LgoKVGhhdCdzIG9uZSBvZiB0aGUgJ2xpYmVy dGllcycgSSBhbGx1ZGVkIHRvLiBUaGUgcmVhc29uIEkgbGVmdCB0aGVzZSBpbiAKaXMgdGhhdCBJ J20gbm9uZSB0b28gY2VydGFpbiB3aGF0IGRldmljZSBmZWF0dXJlIHRoZSBETUEgQVBJIHVzZXMg dG8gCmRlY2lkZSBhIGRldmljZSBpc24ndCBjYWNoZS1jb2hlcmVudC4gSWYgaXQncyBkZXYtPmNv aGVyZW50X2RtYV9tYXNrLCAKdGhlIHdheSBJIHNldCB1cCB0aGUgZGV2aWNlIGluIHRoZSBhMzAw MCBkcml2ZXIgc2hvdWxkIGxlYXZlIHRoZSAKY29oZXJlbnQgbWFzayB1bmNoYW5nZWQuIEZvciB0 aGUgWm9ycm8gZHJpdmVycywgZGV2aWNlcyBhcmUgc2V0IHVwIHRvIAp1c2UgdGhlIHNhbWUgc3Rv cmFnZSB0byBzdG9yZSBub3JtYWwgYW5kIGNvaGVyZW50IG1hc2tzIC0gc29tZXRoaW5nIHdlIApt b3N0IGxpa2VseSB3YW50IHRvIGNoYW5nZS4gSSBuZWVkIHRvIHRoaW5rIGFib3V0IHRoZSByYW1p ZmljYXRpb25zIG9mIAp0aGF0LgoKTm90ZSB0aGF0IHpvcnJvX2VzcC5jIHVzZXMgZG1hX3N5bmNf c2luZ2xlX2Zvcl9kZXZpY2UoKSBhbmQgdXNlcyBhIDMyIApiaXQgY29oZXJlbnQgRE1BIG1hc2sg d2hpY2ggZG9lcyB3b3JrIE9LLiBJIG1pZ2h0wqAgYXNrIEFkcmlhbiB0byB0ZXN0IGEgCmNoYW5n ZSB0byBvbmx5IHNldCBkZXYtPmRtYV9tYXNrLCBhbmQgZHJvcCB0aGUgCmRtYV9zeW5jX3Npbmds ZV9mb3JfZGV2aWNlKCkgY2FsbHMgaWYgdGhlcmUncyBhbnkgZG91YnQgb24gdGhpcyBhc3BlY3Qu Cgo+IGIpIFRoZSBib3VuY2UgYnVmZmVyIGlzIG5ldmVyIG1hcHBlZCBoZXJlLCBpbnN0ZWFkIHlv dSBoYXZlIHRoZQo+IHZpcnRfdG9fcGh5cygpIGhlcmUsIHdoaWNoIGlzIG5vdCB0aGUgc2FtZS4g SSB0aGluayB5b3UgbmVlZCB0byBtYXAKPiB0aGUgcG9pbnRlciB0aGF0IGFjdHVhbGx5IGdldHMg cGFzc2VkIGRvd24gdG8gdGhlIGRldmljZSBhZnRlciBkZWNpZGluZwo+IHRvIHVzZSBhIGJvdWNl IGJ1ZmZlciBvciBub3QuCgpJIGhhZG4ndCByZWFsaXplZCB0aGF0IEkgY2FuIG1hcCB0aGUgYm91 bmNlIGJ1ZmZlciBqdXN0IGFzIGl0J3MgZG9uZSBmb3IgCnRoZSBTQ3AgZGF0YSBidWZmZXIuIFNo b3VsZCBoYXZlIGJlZW4gb2J2aW91cywgYnV0IEknbSBzdGlsbCBsZWFybmluZyAKYWJvdXQgdGhl IERNQSBBUEkuCgpJJ3ZlIHVwZGF0ZWQgdGhlIHBhdGNoIG5vdywgd2lsbCByZS1zZW5kIGFzIHBh cnQgb2YgYSBjb21wbGV0ZSBzZXJpZXMgCm9uY2UgZG9uZS4KCkNoZWVycywKCiDCoMKgwqAgTWlj aGFlbAoKCj4KPiAgICAgICBBcm5kCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fCmlvbW11IG1haWxpbmcgbGlzdAppb21tdUBsaXN0cy5saW51eC1mb3VuZGF0 aW9uLm9yZwpodHRwczovL2xpc3RzLmxpbnV4Zm91bmRhdGlvbi5vcmcvbWFpbG1hbi9saXN0aW5m by9pb21tdQ==