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Fri, 2 Apr 2021 01:45:17 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp4.osuosl.org ([127.0.0.1]) by localhost (smtp4.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id h7vVw54NYBjO for ; Fri, 2 Apr 2021 01:45:16 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.8.0 Received: from szxga04-in.huawei.com (szxga04-in.huawei.com [45.249.212.190]) by smtp4.osuosl.org (Postfix) with ESMTPS id 06BAF41919 for ; Fri, 2 Apr 2021 01:45:15 +0000 (UTC) Received: from DGGEMS413-HUB.china.huawei.com (unknown [172.30.72.59]) by szxga04-in.huawei.com (SkyGuard) with ESMTP id 4FBN9P0psmz1BFlH; Fri, 2 Apr 2021 09:43:05 +0800 (CST) Received: from [127.0.0.1] (10.40.188.87) by DGGEMS413-HUB.china.huawei.com (10.3.19.213) with Microsoft SMTP Server id 14.3.498.0; Fri, 2 Apr 2021 09:45:02 +0800 Subject: Re: [PATCH v14 10/10] iommu/arm-smmu-v3: Add stall support for platform devices To: Will Deacon , Jean-Philippe Brucker References: <20210401154718.307519-1-jean-philippe@linaro.org> <20210401154718.307519-11-jean-philippe@linaro.org> <20210401171101.GB9447@willie-the-truck> From: Zhou Wang Message-ID: <8e55e807-69f2-6492-e4a0-0dd9250142bc@hisilicon.com> Date: Fri, 2 Apr 2021 09:45:01 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.7.1 MIME-Version: 1.0 In-Reply-To: <20210401171101.GB9447@willie-the-truck> X-Originating-IP: [10.40.188.87] X-CFilter-Loop: Reflected Cc: devicetree@vger.kernel.org, kevin.tian@intel.com, vivek.gautam@arm.com, guohanjun@huawei.com, rjw@rjwysocki.net, linux-acpi@vger.kernel.org, iommu@lists.linux-foundation.org, robh+dt@kernel.org, linux-arm-kernel@lists.infradead.org, sudeep.holla@arm.com, zhangfei.gao@linaro.org, robin.murphy@arm.com, linux-accelerators@lists.ozlabs.org, lenb@kernel.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-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" T24gMjAyMS80LzIgMToxMSwgV2lsbCBEZWFjb24gd3JvdGU6Cj4gT24gVGh1LCBBcHIgMDEsIDIw MjEgYXQgMDU6NDc6MTlQTSArMDIwMCwgSmVhbi1QaGlsaXBwZSBCcnVja2VyIHdyb3RlOgo+PiBU aGUgU01NVSBwcm92aWRlcyBhIFN0YWxsIG1vZGVsIGZvciBoYW5kbGluZyBwYWdlIGZhdWx0cyBp biBwbGF0Zm9ybQo+PiBkZXZpY2VzLiBJdCBpcyBzaW1pbGFyIHRvIFBDSWUgUFJJLCBidXQgZG9l c24ndCByZXF1aXJlIGRldmljZXMgdG8gaGF2ZQo+PiB0aGVpciBvd24gdHJhbnNsYXRpb24gY2Fj aGUuIEluc3RlYWQsIGZhdWx0aW5nIHRyYW5zYWN0aW9ucyBhcmUgcGFya2VkCj4+IGFuZCB0aGUg T1MgaXMgZ2l2ZW4gYSBjaGFuY2UgdG8gZml4IHRoZSBwYWdlIHRhYmxlcyBhbmQgcmV0cnkgdGhl Cj4+IHRyYW5zYWN0aW9uLgo+Pgo+PiBFbmFibGUgc3RhbGwgZm9yIGRldmljZXMgdGhhdCBzdXBw b3J0IGl0IChvcHQtaW4gYnkgZmlybXdhcmUpLiBXaGVuIGFuCj4+IGV2ZW50IGNvcnJlc3BvbmRz IHRvIGEgdHJhbnNsYXRpb24gZXJyb3IsIGNhbGwgdGhlIElPTU1VIGZhdWx0IGhhbmRsZXIuCj4+ IElmIHRoZSBmYXVsdCBpcyByZWNvdmVyYWJsZSwgaXQgd2lsbCBjYWxsIHVzIGJhY2sgdG8gdGVy bWluYXRlIG9yCj4+IGNvbnRpbnVlIHRoZSBzdGFsbC4KPiAKPiBXaGljaCBoYXJkd2FyZSBpcyB0 aGlzIHVzZWZ1bCBmb3I/IFN0YWxsaW5nIGFkZHMgYSBmYWlyIGFtb3VudCBvZiBjb21wbGV4aXR5 Cj4gdG8gdGhlIGRyaXZlciwgc28gSSBkb24ndCB0aGluayB3ZSBzaG91bGQgc3VwcG9ydCBpdCB1 bmxlc3Mgd2UncmUgbGlrZWx5IHRvCj4gc2VlIHBsYXRmb3JtcyB0aGF0IGJvdGggaW1wbGVtZW50 IGl0IGFuZCBkbyBzb21ldGhpbmcgdXNlZnVsIHdpdGggaXQuCgpIaSBXaWxs77yMCgpIaVNpbGlj b24gS3VucGVuZzkyMCdzIFpJUC9TRUMvSFBSRSBlbmdpbmVzKGRyaXZlcnMvY3J5cHRvL2hpc2ls aWNvbi8pIGFyZSB1c2luZwpzdGFsbCBtb2RlLgoKVUFDQ0UgZHJpdmVyKGRyaXZlcnMvbWlzYy91 YWNjZS8pIGlzIHVzZWQgdG8gZXhwb3J0IHRoZXNlIGVuZ2luZXMgdG8gdXNlciBzcGFjZS4KQSB1 c2VyIHNwYWNlIGxpYnJhcnk6IGh0dHBzOi8vZ2l0aHViLmNvbS9MaW5hcm8vdWFkayBvZmZlcnMg QVBJcyB0byBoZWxwIHVzZXJzCnRvIHVzZSB0aGVzZSBlbmdpbmVzLgoKSW4gZmFjdCwgd2Ugb25s eSBuZWVkIGEgcXVpcmsoaHR0cHM6Ly9sa21sLm9yZy9sa21sLzIwMjEvMy84LzE1MDYpIGJhc2Vk IG9uIHRoaXMKSU9QRiBzZXJpZXMgdG8gbWFrZSB3aG9sZSBzb2x1dGlvbiBtYWlubGluZSByZWFk eS4gU28gcGxlYXNlIGFsc28gdGFrZSB0aGlzCnBhdGNoLCB3ZSBuZWVkIGl0ISA6KQoKQmVzdCwK WmhvdQoKPiAKPiBXaWxsCj4gCj4gLgo+IAoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX18KaW9tbXUgbWFpbGluZyBsaXN0CmlvbW11QGxpc3RzLmxpbnV4LWZv dW5kYXRpb24ub3JnCmh0dHBzOi8vbGlzdHMubGludXhmb3VuZGF0aW9uLm9yZy9tYWlsbWFuL2xp c3RpbmZvL2lvbW11