From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 845AB1684B4 for ; Tue, 6 Jan 2026 15:14:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.176.79.56 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767712463; cv=none; b=SmN6cGR4d7v7ohIEZH1KjBj+ebOXez8OA/cATLc9sdxW2Q1O5s5ri991F3iRTv7/+U7LZUTfK+nqtKGk6Q6RihaOdCJqsAiItYrq7mz9Rxfk60p9lyNvVBhgTtE155bdZhRiEMgLAKi+pGsz50EJ1nLYPpSS/cm1+Sh539fmYcU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767712463; c=relaxed/simple; bh=qJjWFMrm2lSltPboaeRjtY/9lwQapGTPtRXjwelNq4Q=; h=Date:From:To:CC:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=eWyl8LA2LbDRluK7SpoU1Dts9W9Oj0U/sLt9wrBpyrc5GRyI1PxSv5ul1pstkpFl2NGdj3Aq3DNj3PQKFmFAud3gOImEJud0t3lfwIK0zixJM/JriWf1KYtddHtlfCyNrG2ezPd8nmSSRSBhnp/v87qiYAEOeSu3NTXFwAn8eXU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=185.176.79.56 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.18.224.150]) by frasgout.his.huawei.com (SkyGuard) with ESMTPS id 4dlvpG2c3zzHnH4v; Tue, 6 Jan 2026 23:14:14 +0800 (CST) Received: from dubpeml100005.china.huawei.com (unknown [7.214.146.113]) by mail.maildlp.com (Postfix) with ESMTPS id B759240539; Tue, 6 Jan 2026 23:14:18 +0800 (CST) Received: from localhost (10.195.245.156) by dubpeml100005.china.huawei.com (7.214.146.113) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.36; Tue, 6 Jan 2026 15:14:17 +0000 Date: Tue, 6 Jan 2026 15:14:15 +0000 From: Jonathan Cameron To: Ben Horgan CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: Re: [PATCH v2 41/45] arm_mpam: Add quirk framework Message-ID: <20260106151415.00002119@huawei.com> In-Reply-To: <20251219181147.3404071-42-ben.horgan@arm.com> References: <20251219181147.3404071-1-ben.horgan@arm.com> <20251219181147.3404071-42-ben.horgan@arm.com> X-Mailer: Claws Mail 4.3.0 (GTK 3.24.42; x86_64-w64-mingw32) Precedence: bulk X-Mailing-List: kvmarm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-ClientProxiedBy: lhrpeml100011.china.huawei.com (7.191.174.247) To dubpeml100005.china.huawei.com (7.214.146.113) On Fri, 19 Dec 2025 18:11:43 +0000 Ben Horgan wrote: > From: Shanker Donthineni > > The MPAM specification includes the MPAMF_IIDR, which serves to uniquely > identify the MSC implementation through a combination of implementer > details, product ID, variant, and revision. Certain hardware issues/errata > can be resolved using software workarounds. > > Introduce a quirk framework to allow workarounds to be enabled based on the > MPAMF_IIDR value. > > [ morse: Stash the IIDR so this doesn't need an IPI, enable quirks only > once, move the description to the callback so it can be pr_once()d, add an > enum of workarounds for popular errata. Add macros for making lists of > product/revision/vendor half readable ] Review comment that got left over? Otherwise looks fairly standard for quirk handling. Reviewed-by: Jonathan Cameron > > Signed-off-by: Shanker Donthineni > Signed-off-by: James Morse > Signed-off-by: Ben Horgan