From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from canpmsgout02.his.huawei.com (canpmsgout02.his.huawei.com [113.46.200.217]) (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 0C8E52D1F40; Wed, 20 May 2026 08:51:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=113.46.200.217 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779267113; cv=none; b=rjOTq2L2SYb9SBiTIyZhh/zHWPNPkHb7UCY2EbZwoWcL+9KnYwc/lFTK9t2BaCrAaIFaeCUmAdh6CTg2vBUXi4OPQE8JgKBOQO8Yrbun4jc0E4z1ToKJNQ1VV0bfgsoKsDCxXS63ioXvvAwU7B34u8n7eq2Yf8fDF/Tjj76frD8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779267113; c=relaxed/simple; bh=9JAocrfSRE8OAcaCFSUKgWUvl095GAK8sITS8uCFLjM=; h=Message-ID:Date:MIME-Version:Subject:To:CC:References:From: In-Reply-To:Content-Type; b=E7duziOdiDfscyg9lEQvP34MqmSVEWvSFoFzz1JEWTCLr+CjBtZWnkSDBhd7jJPnJOxyZ1+aVygaRDPp8ipYbOg2xrYsu+n4beogOXrtsvpQmptRxykiUMGBQOI4WfW6EkPEkNwYbIXLDuadjZcwFflom22FqecZZLkZNzNFdcc= 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; dkim=pass (1024-bit key) header.d=huawei.com header.i=@huawei.com header.b=ahldOXzR; arc=none smtp.client-ip=113.46.200.217 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 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=huawei.com header.i=@huawei.com header.b="ahldOXzR" dkim-signature: v=1; a=rsa-sha256; d=huawei.com; s=dkim; c=relaxed/relaxed; q=dns/txt; h=From; bh=5ILLE5X/zh5Zp5m7SYWsEaC8ZBBvgKc8eCKNCOEyqYg=; b=ahldOXzRVBCatzSoLh4qIWjZNKkjLW+qbMChK+u+JTSiPCXdTZPYb9zQteodxgzTQLeiOjLFL 1TOQJNZphPCA3XiHB3+YzYEx6XTyKjoXuFgzD869C++zx7TZXKvZ+XrYS/dQlY+k8Os8NGRpKvC x+HpkHsLmUgowgc8bj+OXyA= Received: from mail.maildlp.com (unknown [172.19.162.144]) by canpmsgout02.his.huawei.com (SkyGuard) with ESMTPS id 4gL4pP2yrDzcbR6; Wed, 20 May 2026 16:44:13 +0800 (CST) Received: from kwepemr100010.china.huawei.com (unknown [7.202.195.125]) by mail.maildlp.com (Postfix) with ESMTPS id 6149B4056E; Wed, 20 May 2026 16:51:47 +0800 (CST) Received: from [10.67.120.103] (10.67.120.103) by kwepemr100010.china.huawei.com (7.202.195.125) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.36; Wed, 20 May 2026 16:51:46 +0800 Message-ID: Date: Wed, 20 May 2026 16:51:46 +0800 Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 0/5] Support the FEAT_HDBSS introduced in Armv9.5 To: Will Deacon , , , , , , Tian Zheng CC: , , , , , , , , , , , , , , Jonathan Cameron References: <20260225040421.2683931-1-zhengtian10@huawei.com> <177918656142.736362.17906576792384645789.b4-ty@kernel.org> From: Tian Zheng In-Reply-To: <177918656142.736362.17906576792384645789.b4-ty@kernel.org> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: kwepems200001.china.huawei.com (7.221.188.67) To kwepemr100010.china.huawei.com (7.202.195.125) On 5/19/2026 11:23 PM, Will Deacon wrote: > On Wed, 25 Feb 2026 12:04:16 +0800, Tian Zheng wrote: >> This series of patches add support to the Hardware Dirty state tracking >> Structure(HDBSS) feature, which is introduced by the ARM architecture >> in the DDI0601(ID121123) version. >> >> The HDBSS feature is an extension to the architecture that enhances >> tracking translation table descriptors' dirty state, identified as >> FEAT_HDBSS. This feature utilizes hardware assistance to achieve dirty >> page tracking, aiming to significantly reduce the overhead of scanning >> for dirty pages. >> >> [...] > > Applied sysreg definitions to arm64 (for-next/sysregs), thanks! > > [1/5] arm64/sysreg: Add HDBSS related register information > https://git.kernel.org/arm64/c/72f7be0c2e30 > > Cheers, Thanks! Tian