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Wed, 31 Mar 2021 05:49:20 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp2.osuosl.org ([127.0.0.1]) by localhost (smtp2.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id td5Fmra4la8X for ; Wed, 31 Mar 2021 05:49:19 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.8.0 Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by smtp2.osuosl.org (Postfix) with ESMTPS id 13F01401E3 for ; Wed, 31 Mar 2021 05:49:18 +0000 (UTC) IronPort-SDR: 6R9tSIg4MZkIHcbFHlyzNK7tJ0yLy+fo0KoVddebqoaluYrX9Fju7siYsV1a0F1g/V6Sn0zYtB JeRobgYw48tg== X-IronPort-AV: E=McAfee;i="6000,8403,9939"; a="191401118" X-IronPort-AV: E=Sophos;i="5.81,291,1610438400"; d="scan'208";a="191401118" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Mar 2021 22:49:17 -0700 IronPort-SDR: ba+XWeIwmYW/opvq7Op8QU/aZRWkCXU2FL5Tr/qgArZ3UfIk8/4Ty91jAVH6BsylI6DKJ7XRtO 0nRvSCJ5yBdg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.81,291,1610438400"; d="scan'208";a="438628990" Received: from allen-box.sh.intel.com (HELO [10.239.159.128]) ([10.239.159.128]) by fmsmga004.fm.intel.com with ESMTP; 30 Mar 2021 22:49:14 -0700 Subject: Re: [RFC PATCH 2/5] iommu: Add an unmap_pages() op for IOMMU drivers To: isaacm@codeaurora.org References: <20210331030042.13348-1-isaacm@codeaurora.org> <20210331030042.13348-3-isaacm@codeaurora.org> <4c396e68a076f321ed3f406c2c875006@codeaurora.org> From: Lu Baolu Message-ID: <3a931043-71bc-88a2-ee57-be9c139e7c9f@linux.intel.com> Date: Wed, 31 Mar 2021 13:39:54 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.7.1 MIME-Version: 1.0 In-Reply-To: <4c396e68a076f321ed3f406c2c875006@codeaurora.org> Content-Language: en-US Cc: will@kernel.org, iommu@lists.linux-foundation.org, robin.murphy@arm.com, linux-arm-kernel@lists.infradead.org, pratikp@codeaurora.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" T24gMy8zMS8yMSAxOjM2IFBNLCBpc2FhY21AY29kZWF1cm9yYS5vcmcgd3JvdGU6Cj4gT24gMjAy MS0wMy0zMCAyMTo0NywgTHUgQmFvbHUgd3JvdGU6Cj4+IE9uIDMvMzEvMjEgMTE6MDAgQU0sIElz YWFjIEouIE1hbmphcnJlcyB3cm90ZToKPj4+IEFkZCBhIGNhbGxiYWNrIGZvciBJT01NVSBkcml2 ZXJzIHRvIHByb3ZpZGUgYSBwYXRoIGZvciB0aGUKPj4+IElPTU1VIGZyYW1ld29yayB0byBjYWxs IGludG8gYW4gSU9NTVUgZHJpdmVyLCB3aGljaCBjYW4gY2FsbAo+Pj4gaW50byB0aGUgaW8tcGd0 YWJsZSBjb2RlLCB0byB1bm1hcCBhIHZpcnR1YWxseSBjb250aWd1b3VzCj4+PiByYW5nZSBvZiBw YWdlcyBvZiB0aGUgc2FtZSBzaXplLgo+Pj4KPj4+IEZvciBJT01NVSBkcml2ZXJzIHRoYXQgZG8g bm90IHNwZWNpZnkgYW4gdW5tYXBfcGFnZXMoKSBjYWxsYmFjaywKPj4+IHRoZSBleGlzdGluZyBs b2dpYyBvZiB1bm1hcHBpbmcgbWVtb3J5IG9uZSBwYWdlIGJsb2NrIGF0IGEgdGltZQo+Pj4gd2ls bCBiZSB1c2VkLgo+Pj4KPj4+IFNpZ25lZC1vZmYtYnk6IElzYWFjIEouIE1hbmphcnJlcyA8aXNh YWNtQGNvZGVhdXJvcmEub3JnPgo+Pj4gU3VnZ2VzdGVkLWJ5OiBXaWxsIERlYWNvbiA8d2lsbEBr ZXJuZWwub3JnPgo+Pj4gLS0tCj4+PiDCoCBpbmNsdWRlL2xpbnV4L2lvbW11LmggfCA0ICsrKysK Pj4+IMKgIDEgZmlsZSBjaGFuZ2VkLCA0IGluc2VydGlvbnMoKykKPj4+Cj4+PiBkaWZmIC0tZ2l0 IGEvaW5jbHVkZS9saW51eC9pb21tdS5oIGIvaW5jbHVkZS9saW51eC9pb21tdS5oCj4+PiBpbmRl eCA1ZTdmZTUxOTQzMGEuLjljZjgxMjQyNTgxYSAxMDA2NDQKPj4+IC0tLSBhL2luY2x1ZGUvbGlu dXgvaW9tbXUuaAo+Pj4gKysrIGIvaW5jbHVkZS9saW51eC9pb21tdS5oCj4+PiBAQCAtMTkzLDYg KzE5Myw3IEBAIHN0cnVjdCBpb21tdV9pb3RsYl9nYXRoZXIgewo+Pj4gwqDCoCAqIEBkZXRhY2hf ZGV2OiBkZXRhY2ggZGV2aWNlIGZyb20gYW4gaW9tbXUgZG9tYWluCj4+PiDCoMKgICogQG1hcDog bWFwIGEgcGh5c2ljYWxseSBjb250aWd1b3VzIG1lbW9yeSByZWdpb24gdG8gYW4gaW9tbXUgZG9t YWluCj4+PiDCoMKgICogQHVubWFwOiB1bm1hcCBhIHBoeXNpY2FsbHkgY29udGlndW91cyBtZW1v cnkgcmVnaW9uIGZyb20gYW4gCj4+PiBpb21tdSBkb21haW4KPj4+ICsgKiBAdW5tYXBfcGFnZXM6 IHVubWFwIGEgbnVtYmVyIG9mIHBhZ2VzIG9mIHRoZSBzYW1lIHNpemUgZnJvbSBhbiAKPj4+IGlv bW11IGRvbWFpbgo+Pj4gwqDCoCAqIEBmbHVzaF9pb3RsYl9hbGw6IFN5bmNocm9ub3VzbHkgZmx1 c2ggYWxsIGhhcmR3YXJlIFRMQnMgZm9yIHRoaXMgCj4+PiBkb21haW4KPj4+IMKgwqAgKiBAaW90 bGJfc3luY19tYXA6IFN5bmMgbWFwcGluZ3MgY3JlYXRlZCByZWNlbnRseSB1c2luZyBAbWFwIHRv IAo+Pj4gdGhlIGhhcmR3YXJlCj4+PiDCoMKgICogQGlvdGxiX3N5bmM6IEZsdXNoIGFsbCBxdWV1 ZWQgcmFuZ2VzIGZyb20gdGhlIGhhcmR3YXJlIFRMQnMgYW5kIAo+Pj4gZW1wdHkgZmx1c2gKPj4+ IEBAIC0yNDUsNiArMjQ2LDkgQEAgc3RydWN0IGlvbW11X29wcyB7Cj4+PiDCoMKgwqDCoMKgwqDC oMKgwqDCoMKgwqAgcGh5c19hZGRyX3QgcGFkZHIsIHNpemVfdCBzaXplLCBpbnQgcHJvdCwgZ2Zw X3QgZ2ZwKTsKPj4+IMKgwqDCoMKgwqAgc2l6ZV90ICgqdW5tYXApKHN0cnVjdCBpb21tdV9kb21h aW4gKmRvbWFpbiwgdW5zaWduZWQgbG9uZyBpb3ZhLAo+Pj4gwqDCoMKgwqDCoMKgwqDCoMKgwqDC oMKgwqDCoCBzaXplX3Qgc2l6ZSwgc3RydWN0IGlvbW11X2lvdGxiX2dhdGhlciAqaW90bGJfZ2F0 aGVyKTsKPj4+ICvCoMKgwqAgc2l6ZV90ICgqdW5tYXBfcGFnZXMpKHN0cnVjdCBpb21tdV9kb21h aW4gKmRvbWFpbiwgdW5zaWduZWQgbG9uZyAKPj4+IGlvdmEsCj4+PiArwqDCoMKgwqDCoMKgwqDC oMKgwqDCoMKgwqDCoMKgwqDCoCBzaXplX3QgcGdzaXplLCBzaXplX3QgcGdjb3VudCwKPj4+ICvC oMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgIHN0cnVjdCBpb21tdV9pb3RsYl9nYXRo ZXIgKmlvdGxiX2dhdGhlcik7Cj4+Cj4+IElzIGl0IHBvc3NpYmxlIHRvIGFkZCBhbiBlcXVpdmFs ZW50IG1hcF9wYWdlcygpIGNhbGxiYWNrPwo+IFllcywgbWFwX3BhZ2VzKCkgY2FuIGJlIGltcGxl bWVudGVkIGFuZCBjYW4gbGV2ZXJhZ2UgYSBsb3Qgb2YgdGhlIAo+IGltcGxlbWVudGF0aW9uCj4g b2YgdW5tYXBfcGFnZXMoKS4gVGhlIHByb2JsZW0gaXMgdGhhdCBpZiB5b3UgbWFwIHNldmVyYWwg cGFnZXMgaW4gb25lIAo+IGNhbGwsIGFuZCB0aGVuCj4gZW5jb3VudGVyIGFuIGVycm9yIGFuZCBo YXZlIHRvIHJvbGxiYWNrLCB5b3Ugc2hvdWxkIGRvIFRMQiBtYWludGVuYW5jZSwgCj4gYXMgaW9t bXVfbWFwCj4gZG9lcyB3aGVuIGl0IGVuY291bnRlcnMgYW4gZXJyb3IuIEhvd2V2ZXIsIHdlIGNh bid0IGNhbGwgaW9tbXVfdW5tYXAgCj4gZnJvbSBpby1wZ3RhYmxlLWFybQo+IGZvciBleGFtcGxl LiBXZSBjYW4gY2FsbCBhcm1fbHBhZV91bm1hcF9wYWdlcygpIGZyb20gdGhlIGxhdGVyIHBhdGNo ZXMsIAo+IGJ1dCB0aGF0IGRvZXNuJ3QKPiBzb2x2ZSB0aGUgVExCIG1haW50ZW5hbmNlIGlzc3Vl LiBEbyB5b3UgaGF2ZSBhbnkgdGhvdWdodHMgb24gaG93IHRvIAo+IGFkZHJlc3MgdGhpcz8KCkNh bGwgdW5tYXBfcGFnZXMoKSB3aXRoIHRoZSBzYW1lIHBhZ2VzIGFuZCBzaXplIHRvIHJvbGwgYmFj ay4gRG9lcyBpdAp3b3JrPwoKQmVzdCByZWdhcmRzLApiYW9sdQoKPj4KPj4+IMKgwqDCoMKgwqAg dm9pZCAoKmZsdXNoX2lvdGxiX2FsbCkoc3RydWN0IGlvbW11X2RvbWFpbiAqZG9tYWluKTsKPj4+ IMKgwqDCoMKgwqAgdm9pZCAoKmlvdGxiX3N5bmNfbWFwKShzdHJ1Y3QgaW9tbXVfZG9tYWluICpk b21haW4sIHVuc2lnbmVkIAo+Pj4gbG9uZyBpb3ZhLAo+Pj4gwqDCoMKgwqDCoMKgwqDCoMKgwqDC oMKgwqDCoMKgwqDCoMKgwqDCoCBzaXplX3Qgc2l6ZSk7Cj4+Pgo+Pgo+PiBCZXN0IHJlZ2FyZHMs Cj4+IGJhb2x1Cl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f CmlvbW11IG1haWxpbmcgbGlzdAppb21tdUBsaXN0cy5saW51eC1mb3VuZGF0aW9uLm9yZwpodHRw czovL2xpc3RzLmxpbnV4Zm91bmRhdGlvbi5vcmcvbWFpbG1hbi9saXN0aW5mby9pb21tdQ==