From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.9]) (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 401D61990D9 for ; Mon, 27 Oct 2025 14:30:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.9 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761575445; cv=none; b=Agnww/o96Lm/Oh3WzJArMAmsVzri98a7loFZgbTTCyU+xCm/87VnQHV7xchpxqgLlsWmXFaJNuDsooIec4Ot42VyPx5SuntYp5B5N/na1f1UdVHN67WgBGYPfLIuHoUuq18Ob54A1Ijx2+HyLkwmpdOH0BegLH+3SFIAr3dw154= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761575445; c=relaxed/simple; bh=VR8KtBaG7IyyfxNYO4i5dAF9bwTcxkF/LmitIazWy0E=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=HRPf5U7x0HcMD1mVmJVrgSJBm/wDPfZQGOdkU2BY4+fbPACSs4JLVU57SWLKcmpZiQFj77eb1wrHjoOB/ieSSZWSwQrrxh2xi3TR9MU02qpRvgL0vvWTKw4UpSmdZMqGXI2iqEntOlH3ncOrpFRnBatbVSJZL6/B3y9OnNjkxWA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=pass smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=HNUxjh6l; arc=none smtp.client-ip=192.198.163.9 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="HNUxjh6l" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1761575443; x=1793111443; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=VR8KtBaG7IyyfxNYO4i5dAF9bwTcxkF/LmitIazWy0E=; b=HNUxjh6l75ddBNa+j68QN21EKDQ9PR3Rx8+zZKE4LtvFsWJ6lmXmIMQh 1VkwgI1r66swLa1tpcYqPgMbJ/OrIzJbm+u1Rjmq8nihMYo3nUatzP7zz m9/eeo5HidQmTFl9W6P2E3zvJV1KwrlTIvycAgF2Rw6ioMOL1Y8ZXwGlq EnBOIupaQEzEbWnTOCpoFiKLjrZL26iy2uIFL0LMT4dmNl9hOM7M4Chrz PB9hDN+MWtjdYy8qq8vaEdeRbjniqJgZbmhFAKlFgkw5EDtS+agIZsJw8 3LTok7hmrcO7LoY8g+B3wJiDNvBAB6meDj2jKVVVBHNJM/Pe21eURPoRq g==; X-CSE-ConnectionGUID: 2434Yg92SqSMih3Qwg7URg== X-CSE-MsgGUID: hvG9uq74Tk+F3YrzND69jQ== X-IronPort-AV: E=McAfee;i="6800,10657,11586"; a="74329821" X-IronPort-AV: E=Sophos;i="6.19,259,1754982000"; d="scan'208";a="74329821" Received: from fmviesa009.fm.intel.com ([10.60.135.149]) by fmvoesa103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Oct 2025 07:30:43 -0700 X-CSE-ConnectionGUID: YcuEGmf5TY6zHORASV2khw== X-CSE-MsgGUID: 4CVwV2hMT+WxDcaxiHeVWA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.19,259,1754982000"; d="scan'208";a="185524715" Received: from egrumbac-mobl6.ger.corp.intel.com (HELO ashevche-desk.local) ([10.245.244.5]) by fmviesa009-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Oct 2025 07:30:41 -0700 Received: from andy by ashevche-desk.local with local (Exim 4.98.2) (envelope-from ) id 1vDOF4-000000032JH-3mWA; Mon, 27 Oct 2025 16:30:38 +0200 Date: Mon, 27 Oct 2025 16:30:38 +0200 From: Andy Shevchenko To: Mark Brown Cc: Christian Eggers , Javier Carrasco , Krystian Garbaciak , linux-kernel@vger.kernel.org Subject: Re: regmap: Modeling a shared page selection register Message-ID: References: <2241758.yiUUSuA9gR@n9w6sw14> <7560d98c-84f3-4405-aa1e-0da79eb47866@sirena.org.uk> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <7560d98c-84f3-4405-aa1e-0da79eb47866@sirena.org.uk> Organization: Intel Finland Oy - BIC 0357606-4 - c/o Alberga Business Park, 6 krs, Bertel Jungin Aukio 5, 02600 Espoo On Mon, Oct 27, 2025 at 01:15:36PM +0000, Mark Brown wrote: > On Mon, Oct 27, 2025 at 10:45:48AM +0200, Andy Shevchenko wrote: > > > Right, the logic behind paging implementation in regmap is a bit tricky > > (and has some known non-critical bugs, FWIW). There is no documentation > > and it appears that most of the drivers using it, do it wrongly. > > Which bugs are you referring to here? For example one I tried to fix that makes the value pf the selector register in virtual address space not synchronised with the page number. -- With Best Regards, Andy Shevchenko