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=-5.3 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no 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 DEB70C388F7 for ; Fri, 13 Nov 2020 10:44:35 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 5899F20678 for ; Fri, 13 Nov 2020 10:44:35 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="Vt8MdjT7" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5899F20678 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Type: Content-Transfer-Encoding:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date:Message-ID:References: To:From:Subject:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=A/i9ah+YKkQmEXSAj8Qbk0AKkTLyw4Tacujud9p2oKU=; b=Vt8MdjT7QBi1Byo/YqfozwUXj +SWOw92JJE6EsQqhVkS3LBSRFs9BkQKKhj/D8o7hc7qxxGjLZhmXRT552QzurD2g7dPeqDu1yKMeL OCRWnbezDw7LSM7DMl/8Ychyn3i/kCr37n2tVsegJ/7Nq6lAZrVAsc5q05Mr/gRmlawMgyPx90Em/ KaH/M/qTZvuGQz7ACNYMUg8wfIvbdHKgpWZaTEIERkAR9H2Ib9d1oScuuEAgqgNrfY1NRd+gfc9Dg vgFx3aESXDjLead5fRv7TgxcY+4bax1tn6aYkbyvOfJIQIzY4ZP4X8PDutuuEP7LX4JyhZO+bmCYH V0CmF3xew==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kdWYB-0003ul-Da; Fri, 13 Nov 2020 10:43:27 +0000 Received: from frasgout.his.huawei.com ([185.176.79.56]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kdWY9-0003sb-8u for linux-arm-kernel@lists.infradead.org; Fri, 13 Nov 2020 10:43:26 +0000 Received: from fraeml708-chm.china.huawei.com (unknown [172.18.147.200]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4CXZl22YsHz67KSS; Fri, 13 Nov 2020 18:41:18 +0800 (CST) Received: from lhreml724-chm.china.huawei.com (10.201.108.75) by fraeml708-chm.china.huawei.com (10.206.15.36) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1913.5; Fri, 13 Nov 2020 11:43:16 +0100 Received: from [10.47.88.104] (10.47.88.104) by lhreml724-chm.china.huawei.com (10.201.108.75) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1913.5; Fri, 13 Nov 2020 10:43:16 +0000 Subject: Re: [PATCH v2 0/2] iommu/arm-smmu-v3: Improve cmdq lock efficiency From: John Garry To: Will Deacon References: <1598018062-175608-1-git-send-email-john.garry@huawei.com> <20200921134324.GK2139@willie-the-truck> Message-ID: Date: Fri, 13 Nov 2020 10:43:06 +0000 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.1.2 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-Originating-IP: [10.47.88.104] X-ClientProxiedBy: lhreml752-chm.china.huawei.com (10.201.108.202) To lhreml724-chm.china.huawei.com (10.201.108.75) X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201113_054325_440536_07AA6552 X-CRM114-Status: GOOD ( 19.34 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: maz@kernel.org, joro@8bytes.org, linuxarm@huawei.com, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, robin.murphy@arm.com, linux-arm-kernel@lists.infradead.org Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org T24gMjEvMDkvMjAyMCAxNDo1OCwgSm9obiBHYXJyeSB3cm90ZToKPiBPbiAyMS8wOS8yMDIwIDE0 OjQzLCBXaWxsIERlYWNvbiB3cm90ZToKPj4gT24gRnJpLCBBdWcgMjEsIDIwMjAgYXQgMDk6NTQ6 MjBQTSArMDgwMCwgSm9obiBHYXJyeSB3cm90ZToKPj4+IEFzIG1lbnRpb25lZCBpbiBbMF0sIHRo ZSBDUFUgbWF5IGNvbnN1bWUgbWFueSBjeWNsZXMgcHJvY2Vzc2luZwo+Pj4gYXJtX3NtbXVfY21k cV9pc3N1ZV9jbWRsaXN0KCkuIE9uZSBpc3N1ZSB3ZSBmaW5kIGlzIHRoZSBjbXB4Y2hnKCkgCj4+ PiBsb29wIHRvCj4+PiBnZXQgc3BhY2Ugb24gdGhlIHF1ZXVlIHRha2VzIGEgbG90IG9mIHRpbWUg b25jZSB3ZSBzdGFydCBnZXR0aW5nIG1hbnkKPj4+IENQVXMgY29udGVuZGluZyAtIGZyb20gZXhw ZXJpbWVudCwgZm9yIDY0IENQVXMgY29udGVuZGluZyB0aGUgY21kcSwKPj4+IHN1Y2Nlc3MgcmF0 ZSBpcyB+IDEgaW4gMTIsIHdoaWNoIGlzIHBvb3IsIGJ1dCBub3QgdG90YWxseSBhd2Z1bC4KPj4+ Cj4+PiBUaGlzIHNlcmllcyByZW1vdmVzIHRoYXQgY21weGNoZygpIGFuZCByZXBsYWNlcyB3aXRo IGFuIGF0b21pY19hZGQsCj4+PiBzYW1lIGFzIGhvdyB0aGUgYWN0dWFsIGNtZHEgZGVhbHMgd2l0 aCBtYWludGFpbmluZyB0aGUgcHJvZCBwb2ludGVyLgo+PiDCoD4gSSdtIHN0aWxsIG5vdCBhIGZh biBvZiB0aGlzLgo+IAo+IDooCj4gCj4+IENvdWxkIHlvdSB0cnkgdG8gYWRhcHQgdGhlIGhhY2tz IEkgc2VudCBiZWZvcmUsCj4+IHBsZWFzZT8gSSBrbm93IHRoZXkgd2VyZW4ndCBxdWl0ZSByaWdo dCAoSSBoYXZlIG5vIGhhcmR3YXJlIHRvIHRlc3QgCj4+IG9uKSwgYnV0Cj4+IHRoZSBiYXNpYyBp ZGVhIGlzIHRvIGZhbGwgYmFjayB0byBhIHNwaW5sb2NrIGlmIHRoZSBjbXB4Y2hnKCkgZmFpbHMu IFRoZQo+PiBxdWV1ZWluZyBpbiB0aGUgc3BpbmxvY2sgaW1wbGVtZW50YXRpb24gc2hvdWxkIGF2 b2lkIHRoZSBjb250ZW50aW9uLgo+IAo+IE9LLCBzbyBpZiB5b3UncmUgYXNraW5nIG1lIHRvIHRy eSB0aGlzIGFnYWluLCB0aGVuIEkgY2FuIGRvIHRoYXQsIGFuZCAKPiBzZWUgd2hhdCBpdCBnaXZl cyB1cy4KPiAKCkpGWUksIHRvIHByb3ZlIHRoYXQgdGhpcyBpcyBub3QgYSBwcm9ibGVtIHdoaWNo IGFmZmVjdHMgb25seSBvdXIgSFcsIEkgCm1hbmFnZWQgdG8gdGVzdCBhbiBhcm02NCBwbGF0Zm9y bSBmcm9tIGFub3RoZXIgdmVuZG9yLiBHZW5lcmFsbHkgSSBzZWUgCnRoZSBzYW1lIGlzc3VlLCBh bmQgdGhpcyBwYXRjaHNldCBhY3R1YWxseSBoZWxwcyB0aGF0IHBsYXRmb3JtIGV2ZW4gbW9yZS4K CgkJQ1BVcwlCZWZvcmUJQWZ0ZXIJJSBJbmNyZWFzZQpIdWF3ZWkgRDA2CTgJMjgySwkzMDJLCTcl Ck90aGVyCQkJMzc5Swk0MjBLCTExJQoKSHVhd2VpIEQwNgkxNgkxMTVLCTE5M0sJNjhLCk90aGVy CQkJMTAySwkyOTFLCTE4NUsKCkh1YXdlaSBEMDYJMzIJMzZLCTgwSwkxMjIlCk90aGVyCQkJNDFL CTE1NksJMjgwJQoKSHVhd2VpIEQwNgk2NAkxMUsJMzBLCTE3MiUKT3RoZXIJCQk2Swk0N0sJNjgz JQoKSSB0ZXN0ZWQgd2l0aCBzb21ldGhpbmcgbGlrZSBbMV0sIHNvIHVuaXQgaXMgbWFwK3VubWFw cyBwZXIgY3B1IHBlciAKc2Vjb25kIC0gaGlnaGVyIGlzIGJldHRlci4KCk15IEQwNiBpcyBtZW1v cnkgcG9vciwgc28gd291bGQgZXhwZWN0IGhpZ2hlciByZXN1bHRzIG90aGVyd2lzZSAod2l0aCAK bW9yZSBtZW1vcnkpLiBJbmRlZWQsIG15IEQwNSBoYXMgbWVtb3J5IG9uIGFsbCBub2RlcyBhbmQg cGVyZm9ybXMgYmV0dGVyLgoKQW55d2F5LCBJIHNlZSB0aGF0IHRoZSBpbXBsZW1lbnRhdGlvbiBo ZXJlIGlzIG5vdCBwZXJmZWN0LCBhbmQgSSBjb3VsZCAKbm90IGdldCBzdWdnZXN0ZWQgYXBwcm9h Y2ggdG8gaW1wcm92ZSBwZXJmb3JtYW5jZSBzaWduaWZpY2FudGx5LiBTbyBiYWNrIAp0byB0aGUg ZHJhd2luZyBib2FyZC4uLgoKVGhhbmtzLApKb2huCgpbMV0gCmh0dHBzOi8vbG9yZS5rZXJuZWwu b3JnL2xpbnV4LWlvbW11LzIwMjAxMTAyMDgwNjQ2LjIxODAtMS1zb25nLmJhby5odWFAaGlzaWxp Y29uLmNvbS8KCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f XwpsaW51eC1hcm0ta2VybmVsIG1haWxpbmcgbGlzdApsaW51eC1hcm0ta2VybmVsQGxpc3RzLmlu ZnJhZGVhZC5vcmcKaHR0cDovL2xpc3RzLmluZnJhZGVhZC5vcmcvbWFpbG1hbi9saXN0aW5mby9s aW51eC1hcm0ta2VybmVsCg==