From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-qt1-f182.google.com (mail-qt1-f182.google.com [209.85.160.182]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5A9DF8BFD for ; Mon, 24 Jul 2023 16:33:36 +0000 (UTC) Received: by mail-qt1-f182.google.com with SMTP id d75a77b69052e-403a7066d9bso27327111cf.3 for ; Mon, 24 Jul 2023 09:33:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ziepe.ca; s=google; t=1690216415; x=1690821215; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=NnRivkG6WM9TRuOMq/cdTmoCpoYS5ZS9UTbUmBQcd1w=; b=ggbNxtV8851KGsYP7yv6kkqRILR+/iL0QTDfN1q8EEerW7VSn6NBV5uTn/G3s7s6z2 aoc0LBPy26Sf5gKv8cSzRGhTDJODzUflKajXlfpFesJcSmNIa5zD0RRoPgNwnS//D2vJ YCzgfBA2z7Sv99Vn/T6M0U0RbBMQV69PTObaLSZ7B+U6efWJLtNQNEFiH3x4ByvfmDIo 2rYXcMVH/kDtoqEBw6bn4+YzhMzDYFIN2sWsMWjnx1oKxVjiDo2K+6N+bvZ6mF3su4XJ c4ja2kB8lwJLSJGc/EJFmJwbsYmd+qwrCioga/TStu7Uxmk4TzraCvpaV9+A9fj9sdsw HcUA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690216415; x=1690821215; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=NnRivkG6WM9TRuOMq/cdTmoCpoYS5ZS9UTbUmBQcd1w=; b=UpJOGYoI0QI6h/DycQnmT+TXBMgZebQ1TcXQ4KIIbCfU1ZBzzXCEX5U52c+BokP9UL WSge9yK9IxIwTjB9Dbo1iQDep8ky2mJFySvYr1+kN9ZFL7JW3AwuK1EUPOnrW6S+3Sc4 vBK7LIVBlzAfdZt+fNGzRhm5fydzelgJVCfmBuTQIq4sLHYoiGP5bQaU9pmBw3EhQTvB 80AL7QeN+6Y7uA3rdIAxs0bAYYgQadzrU9EvN5irAiwuyoPJnQ1HD3Ck1JDMhi8WWjsc PINC5S2mg9hXb63ctv5r4Lc3IapkQj3CENUSBlYSDRNXHv++3JAS05mhQDhlfQKGJdUW MYAg== X-Gm-Message-State: ABy/qLY7NcUhzppF7PgjasESYo4BKpc2KfVVgOIlGS8XXybyooInkT+r Eij5UWYzvDfusi0eotbqbAhN+g== X-Google-Smtp-Source: APBJJlFQ4LC4JzpGfviU5rQcz0YnPw5yrkA7UPIbmPCdE3MJ+4yOE8vtrkJazMOsR8QKVwaCNT3WZA== X-Received: by 2002:a05:622a:182:b0:400:938b:eb0e with SMTP id s2-20020a05622a018200b00400938beb0emr277982qtw.43.1690216415053; Mon, 24 Jul 2023 09:33:35 -0700 (PDT) Received: from ziepe.ca (hlfxns017vw-142-68-25-194.dhcp-dynamic.fibreop.ns.bellaliant.net. [142.68.25.194]) by smtp.gmail.com with ESMTPSA id w9-20020ac87189000000b00403eab8b7cesm3395763qto.16.2023.07.24.09.33.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 24 Jul 2023 09:33:34 -0700 (PDT) Received: from jgg by wakko with local (Exim 4.95) (envelope-from ) id 1qNyV3-000K4o-R3; Mon, 24 Jul 2023 13:33:33 -0300 Date: Mon, 24 Jul 2023 13:33:33 -0300 From: Jason Gunthorpe To: Tanmay Jagdale Cc: will@kernel.org, robin.murphy@arm.com, joro@8bytes.org, baolu.lu@linux.intel.com, thunder.leizhen@huawei.com, linux-arm-kernel@lists.infradead.org, iommu@lists.linux.dev, linux-kernel@vger.kernel.org, gcherian@marvell.com, sgoutham@marvell.com, lcherian@marvell.com, bbhushan2@marvell.com Subject: Re: [RESEND PATCH 0/4] Add support for SMMU ECMDQ Message-ID: References: <20230721063513.33431-1-tanmay@marvell.com> Precedence: bulk X-Mailing-List: iommu@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230721063513.33431-1-tanmay@marvell.com> On Fri, Jul 21, 2023 at 02:35:09AM -0400, Tanmay Jagdale wrote: > Resending the patches by Zhen Lei that add > support for SMMU's ECMDQ feature. > > I have tested these patches on Marvell SoC that has the ECMDQ > feature. Last time this came up Robin was interested in real world performance gains Do you have data to share that is motivating you to do this work? Jason