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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 77C20C4332F for ; Fri, 4 Nov 2022 13:47:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231724AbiKDNrW (ORCPT ); Fri, 4 Nov 2022 09:47:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40718 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231708AbiKDNrT (ORCPT ); Fri, 4 Nov 2022 09:47:19 -0400 Received: from mail-qt1-x82a.google.com (mail-qt1-x82a.google.com [IPv6:2607:f8b0:4864:20::82a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 830272F3BC for ; Fri, 4 Nov 2022 06:47:18 -0700 (PDT) Received: by mail-qt1-x82a.google.com with SMTP id w4so3064705qts.0 for ; Fri, 04 Nov 2022 06:47:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=L7WseZRfMElBir/cLk2JQliiFaWR+DdJpgj5HlfNINc=; b=aInlDUycJ9stGOQ6sNTM+uIgV0KRZL7s6M68oHhc/YoM9U5BqzyAomesP/Sj+Wr/22 WollcOSLAbZi9hbxHsy/rqLH5BoWyJAaQS+mOTHxTT+H0FdBPjME44F8W+xGcIk4dDfk 8rpm2zHbs//JwMzcDr2FPThODj+A9Fu1o1SGwenIoq4rjZRsee6JzUbjX3mXjkDiZdIW vILgo8knX1lCe15B2REdpPTOtMDOghaPl81hC+v4xj6t3mK/DAVrnUsiI7sUdr77NiIs GLmPW1pYtKJ8zpb5d2dHVpzELbhKLgLGPB/9bGHF2fEc6kw4PTKUr1J40pjPgugMjXol Zf+w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=L7WseZRfMElBir/cLk2JQliiFaWR+DdJpgj5HlfNINc=; b=PbHJYYH8lqy4LwyQeFqEM0vSwTziW9k6ICMdPqEQQ9v/SzYlYEk/0w0EXy+neXVcVA l/yTsMFtxXigJllE756PpMxVFOTDFUIxnf0BtQ1h+RMPpmO/SOkr0CUisUhUUfSpfNXX i73HyIp7Do77hSoOYHVm4CfhG7hCMBcRVzuyMhDqTv1SJW52fpLQHlqHs6gcQE5i9TAX Xj17oGNzfF4TsL9tiP8/WPsOQDyg3L130vAz/DgdAl3NC7WlELOXTwwMrDdzkY4Hkt8G kLd9TJU5C8sxO/tiYFtqmWGt2f3L9mP8qR0eLvODVMzqZMxVlhQl8MNUCymDZ8wGE4fK Jnow== X-Gm-Message-State: ACrzQf3XQCdUOzU1GpVSBlbgFqv7hLo+cZ3ZqtzkS1O2GJfENgBPS8bd FNn0GFLMtA4Az+fWCCc5xjcssA== X-Google-Smtp-Source: AMsMyM5D2EICh2JE91+aDvxWc6mBwjjHQuWq2+0QafbSqJU3b4BRMSKagNhRlqnN+mXAfVcHcXLJaA== X-Received: by 2002:ac8:7457:0:b0:3a5:4193:e722 with SMTP id h23-20020ac87457000000b003a54193e722mr13997029qtr.415.1667569637708; Fri, 04 Nov 2022 06:47:17 -0700 (PDT) Received: from ?IPV6:2601:586:5000:570:aad6:acd8:4ed9:299b? ([2601:586:5000:570:aad6:acd8:4ed9:299b]) by smtp.gmail.com with ESMTPSA id bp9-20020a05620a458900b006f7ee901674sm2986683qkb.2.2022.11.04.06.47.16 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 04 Nov 2022 06:47:17 -0700 (PDT) Message-ID: <39aac9a0-a2cb-af98-8274-93ff0a7da095@linaro.org> Date: Fri, 4 Nov 2022 09:47:15 -0400 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.4.2 Subject: Re: [PATCH v2 4/6] iommu/exynos: Implement shutdown driver method Content-Language: en-US To: Sam Protsenko , Marek Szyprowski Cc: Joerg Roedel , Will Deacon , Robin Murphy , Sumit Semwal , Alim Akhtar , Janghyuck Kim , Cho KyongHo , Daniel Mentz , David Virag , iommu@lists.linux.dev, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org References: <20221103195154.21495-1-semen.protsenko@linaro.org> <20221103195154.21495-5-semen.protsenko@linaro.org> From: Krzysztof Kozlowski In-Reply-To: <20221103195154.21495-5-semen.protsenko@linaro.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org On 03/11/2022 15:51, Sam Protsenko wrote: > While remove method shouldn't be implemented, as it can't be done > reliably, the shutdown method can be useful for performing a kexec. > That was inspired by other IOMMU drivers, see commit 1a4e90f25b2c > ("iommu/rockchip: Perform a reset on shutdown") for example. > > Signed-off-by: Sam Protsenko Acked-by: Krzysztof Kozlowski Best regards, Krzysztof