From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 78240C31E44 for ; Fri, 14 Jun 2019 09:41:13 +0000 (UTC) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org [140.211.169.12]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 578262082C for ; Fri, 14 Jun 2019 09:41:13 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 578262082C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from mail.linux-foundation.org (localhost [127.0.0.1]) by mail.linuxfoundation.org (Postfix) with ESMTP id 1A520E2B; Fri, 14 Jun 2019 09:41:13 +0000 (UTC) Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 3D2F2AE0 for ; Fri, 14 Jun 2019 09:41:11 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp1.linuxfoundation.org (Postfix) with ESMTP id 8EFA3174 for ; Fri, 14 Jun 2019 09:41:10 +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 1A2482B; Fri, 14 Jun 2019 02:41:10 -0700 (PDT) Received: from [10.1.197.57] (e110467-lin.cambridge.arm.com [10.1.197.57]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id A9ADC3F718; Fri, 14 Jun 2019 02:42:52 -0700 (PDT) Subject: Re: [RFC PATCH v6 1/5] iommu: add an exported function to get minimum page size for a domain To: Yoshihiro Shimoda , joro@8bytes.org, axboe@kernel.dk, ulf.hansson@linaro.org, wsa+renesas@sang-engineering.com References: <1560421215-10750-1-git-send-email-yoshihiro.shimoda.uh@renesas.com> <1560421215-10750-2-git-send-email-yoshihiro.shimoda.uh@renesas.com> From: Robin Murphy Message-ID: <5e295ec3-39c9-de8a-a649-0aeeb0078ae3@arm.com> Date: Fri, 14 Jun 2019 10:41:07 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 In-Reply-To: <1560421215-10750-2-git-send-email-yoshihiro.shimoda.uh@renesas.com> Content-Language: en-GB Cc: linux-renesas-soc@vger.kernel.org, linux-block@vger.kernel.org, iommu@lists.linux-foundation.org, linux-mmc@vger.kernel.org, hch@lst.de X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.12 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" Sender: iommu-bounces@lists.linux-foundation.org Errors-To: iommu-bounces@lists.linux-foundation.org T24gMTMvMDYvMjAxOSAxMToyMCwgWW9zaGloaXJvIFNoaW1vZGEgd3JvdGU6Cj4gVGhpcyBwYXRj aCBhZGRzIGFuIGV4cG9ydGVkIGZ1bmN0aW9uIHRvIGdldCBtaW5pbXVtIHBhZ2Ugc2l6ZSBmb3IK PiBhIGRvbWFpbi4gVGhpcyBwYXRjaCBhbHNvIG1vZGlmaWVzIHNpbWlsYXIgY29kZXMgb24gdGhl IGlvbW11LmMuCgpIZWgsIHNlZWluZyB0aGlzIGdhdmUgbWUgYSBnZW51aW5lIGTDqWrDoCB2dSBt b21lbnQuLi4KCi4uLmJ1dCBpdCB0dXJucyBvdXQgSSBhY3R1YWxseSAqaGF2ZSogcmV2aWV3ZWQg dGhpcyBwYXRjaCBiZWZvcmUgOikKCmh0dHBzOi8vbG9yZS5rZXJuZWwub3JnL2xrbWwvMDVlY2E2 MDEtMDI2NC04MTQxLWNlZWItN2VmN2FkNWQ1NjUwQGFybS5jb20vCgpSb2Jpbi4KCj4gU2lnbmVk LW9mZi1ieTogWW9zaGloaXJvIFNoaW1vZGEgPHlvc2hpaGlyby5zaGltb2RhLnVoQHJlbmVzYXMu Y29tPgo+IC0tLQo+ICAgZHJpdmVycy9pb21tdS9pb21tdS5jIHwgMTggKysrKysrKysrKysrKysr LS0tCj4gICBpbmNsdWRlL2xpbnV4L2lvbW11LmggfCAgMSArCj4gICAyIGZpbGVzIGNoYW5nZWQs IDE2IGluc2VydGlvbnMoKyksIDMgZGVsZXRpb25zKC0pCj4gCj4gZGlmZiAtLWdpdCBhL2RyaXZl cnMvaW9tbXUvaW9tbXUuYyBiL2RyaXZlcnMvaW9tbXUvaW9tbXUuYwo+IGluZGV4IDJhOTA2Mzgu LjdlZDE2YWYgMTAwNjQ0Cj4gLS0tIGEvZHJpdmVycy9pb21tdS9pb21tdS5jCj4gKysrIGIvZHJp dmVycy9pb21tdS9pb21tdS5jCj4gQEAgLTI4MCw2ICsyODAsMTggQEAgaW9tbXVfaW5zZXJ0X2Rl dmljZV9yZXN2X3JlZ2lvbnMoc3RydWN0IGxpc3RfaGVhZCAqZGV2X3Jlc3ZfcmVnaW9ucywKPiAg IAlyZXR1cm4gcmV0Owo+ICAgfQo+ICAgCj4gKy8qKgo+ICsgKiBpb21tdV9nZXRfbWluaW11bV9w YWdlX3NpemUgLSBnZXQgbWluaW11bSBwYWdlIHNpemUgZm9yIGEgZG9tYWluCj4gKyAqIEBkb21h aW46IHRoZSBkb21haW4KPiArICoKPiArICogQWxsb3cgaW9tbXUgZHJpdmVyIHRvIGdldCBhIG1p bmltdW0gcGFnZSBzaXplIGZvciBhIGRvbWFpbi4KPiArICovCj4gK3Vuc2lnbmVkIGxvbmcgaW9t bXVfZ2V0X21pbmltdW1fcGFnZV9zaXplKHN0cnVjdCBpb21tdV9kb21haW4gKmRvbWFpbikKPiAr ewo+ICsJcmV0dXJuIDFVTCA8PCBfX2Zmcyhkb21haW4tPnBnc2l6ZV9iaXRtYXApOwo+ICt9Cj4g K0VYUE9SVF9TWU1CT0xfR1BMKGlvbW11X2dldF9taW5pbXVtX3BhZ2Vfc2l6ZSk7Cj4gKwo+ICAg aW50IGlvbW11X2dldF9ncm91cF9yZXN2X3JlZ2lvbnMoc3RydWN0IGlvbW11X2dyb3VwICpncm91 cCwKPiAgIAkJCQkgc3RydWN0IGxpc3RfaGVhZCAqaGVhZCkKPiAgIHsKPiBAQCAtNTU4LDcgKzU3 MCw3IEBAIHN0YXRpYyBpbnQgaW9tbXVfZ3JvdXBfY3JlYXRlX2RpcmVjdF9tYXBwaW5ncyhzdHJ1 Y3QgaW9tbXVfZ3JvdXAgKmdyb3VwLAo+ICAgCj4gICAJQlVHX09OKCFkb21haW4tPnBnc2l6ZV9i aXRtYXApOwo+ICAgCj4gLQlwZ19zaXplID0gMVVMIDw8IF9fZmZzKGRvbWFpbi0+cGdzaXplX2Jp dG1hcCk7Cj4gKwlwZ19zaXplID0gaW9tbXVfZ2V0X21pbmltdW1fcGFnZV9zaXplKGRvbWFpbik7 Cj4gICAJSU5JVF9MSVNUX0hFQUQoJm1hcHBpbmdzKTsKPiAgIAo+ICAgCWlvbW11X2dldF9yZXN2 X3JlZ2lvbnMoZGV2LCAmbWFwcGluZ3MpOwo+IEBAIC0xNTk1LDcgKzE2MDcsNyBAQCBpbnQgaW9t bXVfbWFwKHN0cnVjdCBpb21tdV9kb21haW4gKmRvbWFpbiwgdW5zaWduZWQgbG9uZyBpb3ZhLAo+ ICAgCQlyZXR1cm4gLUVJTlZBTDsKPiAgIAo+ICAgCS8qIGZpbmQgb3V0IHRoZSBtaW5pbXVtIHBh Z2Ugc2l6ZSBzdXBwb3J0ZWQgKi8KPiAtCW1pbl9wYWdlc3ogPSAxIDw8IF9fZmZzKGRvbWFpbi0+ cGdzaXplX2JpdG1hcCk7Cj4gKwltaW5fcGFnZXN6ID0gaW9tbXVfZ2V0X21pbmltdW1fcGFnZV9z aXplKGRvbWFpbik7Cj4gICAKPiAgIAkvKgo+ICAgCSAqIGJvdGggdGhlIHZpcnR1YWwgYWRkcmVz cyBhbmQgdGhlIHBoeXNpY2FsIG9uZSwgYXMgd2VsbCBhcwo+IEBAIC0xNjU1LDcgKzE2NjcsNyBA QCBzdGF0aWMgc2l6ZV90IF9faW9tbXVfdW5tYXAoc3RydWN0IGlvbW11X2RvbWFpbiAqZG9tYWlu LAo+ICAgCQlyZXR1cm4gMDsKPiAgIAo+ICAgCS8qIGZpbmQgb3V0IHRoZSBtaW5pbXVtIHBhZ2Ug c2l6ZSBzdXBwb3J0ZWQgKi8KPiAtCW1pbl9wYWdlc3ogPSAxIDw8IF9fZmZzKGRvbWFpbi0+cGdz aXplX2JpdG1hcCk7Cj4gKwltaW5fcGFnZXN6ID0gaW9tbXVfZ2V0X21pbmltdW1fcGFnZV9zaXpl KGRvbWFpbik7Cj4gICAKPiAgIAkvKgo+ICAgCSAqIFRoZSB2aXJ0dWFsIGFkZHJlc3MsIGFzIHdl bGwgYXMgdGhlIHNpemUgb2YgdGhlIG1hcHBpbmcsIG11c3QgYmUKPiBkaWZmIC0tZ2l0IGEvaW5j bHVkZS9saW51eC9pb21tdS5oIGIvaW5jbHVkZS9saW51eC9pb21tdS5oCj4gaW5kZXggOTFhZjIy YS4uN2U1M2I0MyAxMDA2NDQKPiAtLS0gYS9pbmNsdWRlL2xpbnV4L2lvbW11LmgKPiArKysgYi9p bmNsdWRlL2xpbnV4L2lvbW11LmgKPiBAQCAtMzY2LDYgKzM2Niw3IEBAIGV4dGVybiBpbnQgaW9t bXVfcmVxdWVzdF9kbWFfZG9tYWluX2Zvcl9kZXYoc3RydWN0IGRldmljZSAqZGV2KTsKPiAgIGV4 dGVybiBzdHJ1Y3QgaW9tbXVfcmVzdl9yZWdpb24gKgo+ICAgaW9tbXVfYWxsb2NfcmVzdl9yZWdp b24ocGh5c19hZGRyX3Qgc3RhcnQsIHNpemVfdCBsZW5ndGgsIGludCBwcm90LAo+ICAgCQkJZW51 bSBpb21tdV9yZXN2X3R5cGUgdHlwZSk7Cj4gK2V4dGVybiB1bnNpZ25lZCBsb25nIGlvbW11X2dl dF9taW5pbXVtX3BhZ2Vfc2l6ZShzdHJ1Y3QgaW9tbXVfZG9tYWluICpkb21haW4pOwo+ICAgZXh0 ZXJuIGludCBpb21tdV9nZXRfZ3JvdXBfcmVzdl9yZWdpb25zKHN0cnVjdCBpb21tdV9ncm91cCAq Z3JvdXAsCj4gICAJCQkJCXN0cnVjdCBsaXN0X2hlYWQgKmhlYWQpOwo+ICAgCj4gCl9fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmlvbW11IG1haWxpbmcgbGlz dAppb21tdUBsaXN0cy5saW51eC1mb3VuZGF0aW9uLm9yZwpodHRwczovL2xpc3RzLmxpbnV4Zm91 bmRhdGlvbi5vcmcvbWFpbG1hbi9saXN0aW5mby9pb21tdQ==