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 5DE8DC6FD1D for ; Thu, 30 Mar 2023 15:07:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232735AbjC3PHC (ORCPT ); Thu, 30 Mar 2023 11:07:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53298 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232741AbjC3PG7 (ORCPT ); Thu, 30 Mar 2023 11:06:59 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DF94C7D83 for ; Thu, 30 Mar 2023 08:06:47 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 841C2620D5 for ; Thu, 30 Mar 2023 15:06:47 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 02D2CC4339B; Thu, 30 Mar 2023 15:06:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1680188806; bh=YylqFNuWsS+Mnc5Y/qsJSCYd3mE18d+yT7l+7jgGZ4k=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=sqXIasze8qHWtF24YuVU5DYPObe9MMHsO/4vFiPbkpIEF7drFokIFDS56+klT5U9C qQ+WD01bJk4n6zMff5K+5PFvoi45W+rIP6bpYMYx7dnFy5zHsnaTY/eFu+tdAz74L3 OLrUZ+vW35sYGnI8CJfI4NeXCShjLMbHEJ8ZFJM94nGPar4KUWTh9cbLWfzbtzhfGl +K1MwEMH9QfGMdYdraz0yrhvtS+PDxWNtRABeUVjIjYfJJKDmkBORTRFApHxxEPTl5 KrSdh4itk9M0BiUXEMjaJsIdEqanbvBWTYirgZ8cgVx3AiLDIFqJmRekcfuEiCfzsV RnF9DdN4+O4aA== Date: Thu, 30 Mar 2023 16:06:41 +0100 From: Will Deacon To: Manivannan Sadhasivam Cc: joro@8bytes.org, catalin.marinas@arm.com, kernel-team@android.com, linux-kernel@vger.kernel.org, steev@kali.org, iommu@lists.linux.dev, johan+linaro@kernel.org, andersson@kernel.org, linux-arm-kernel@lists.infradead.org, robin.murphy@arm.com Subject: Re: [PATCH v5] iommu/arm-smmu-qcom: Limit the SMR groups to 128 Message-ID: <20230330150640.GA4185@willie-the-truck> References: <20230327080029.11584-1-manivannan.sadhasivam@linaro.org> <167991987524.1305084.466646756285487652.b4-ty@kernel.org> <20230330054127.GA9876@thinkpad> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230330054127.GA9876@thinkpad> User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Mar 30, 2023 at 11:11:27AM +0530, Manivannan Sadhasivam wrote: > On Mon, Mar 27, 2023 at 01:52:01PM +0100, Will Deacon wrote: > > On Mon, 27 Mar 2023 13:30:29 +0530, Manivannan Sadhasivam wrote: > > > Some platforms support more than 128 stream matching groups than what is > > > defined by the ARM SMMU architecture specification. But due to some unknown > > > reasons, those additional groups don't exhibit the same behavior as the > > > architecture supported ones. > > > > > > For instance, the additional groups will not detect the quirky behavior of > > > some firmware versions intercepting writes to S2CR register, thus skipping > > > the quirk implemented in the driver and causing boot crash. > > > > > > [...] > > > > Applied to will (for-joerg/arm-smmu/updates), thanks! > > > > Thanks Will! Could you please tag this patch for 6.3-rcS? Even though this patch > is not fixing any issue introduced in 6.3, the affected platform (SC8280XP) has > reasonable upstream support in 6.3 and the distro folks would like to stick to > it for some time. This patch will allow them to boot mainline without any > additional out-of-tree patches. I already queued this up for 6.4 since it's neither a regression nor marked for stable inclusion. Having said that, once it lands in mainline feel free to propose a -stable backport if it's needed by distros. Will