From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.16]) (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 2D93D17C for ; Fri, 22 Nov 2024 14:01:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.16 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732284084; cv=none; b=c+D0cjz1K/eYaHxEJsMufilKEXRfyboabNAoPkCO6SikIbQWkLRouNuWip2QX2g2jWF78pYJ2h+9wlqxSlch/6ITszeSZJQwgG4NkGr5WTSZXpjDhMdwicjNZ/wNBlkPa9Smlez+Q/DH5/9W+kjJVXWRYwxOsXtbBrCfJeai4xY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732284084; c=relaxed/simple; bh=dQLCzDSbSHWbQE2TE0Muii5xptJIQVljwPuXC1CIlJ0=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=AsCyZ9qGE9hVNQGzw6POSIQnczHZ7aO5qryjBizyExdkgzaxxh3rYaCHs5wq2bbVriAsZMpcx3Z+qGs7kY7C0oP2KkUNNMqxzkyQrQIpgKcN/IIzPJvMgx8gIQY/oDoNh6x9HQNTqLUMKHjoTe/H9dbpe2gU6wSmpdq/tONshD8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=Ei+EfTmb; arc=none smtp.client-ip=198.175.65.16 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none 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="Ei+EfTmb" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1732284084; x=1763820084; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=dQLCzDSbSHWbQE2TE0Muii5xptJIQVljwPuXC1CIlJ0=; b=Ei+EfTmbPERyHp74mv/bwjf1SEjw2iqpPiuo4MC62JrDRyq9j7+xonWW +X/ozmZl2VjOWYPatKU6Ey0qs7I6PsR1grWjonMgaLiGfqOOhA0R5nEL7 78/2BlrH2oyycENHzEnmts+xy6IJ4NYYFF++Amds7QFBqmnJdwzxRAdG6 LF60x6GU5W+OpPIwFgaEBCbH7o+lr5gn22yEk832KEaWGRTQzRcStCE5z 5lfPrvmEvKb5iuTg1DBEYL9qA7iA0ZUcL2H2ittMK52YwTfWpz7f214K+ YX0NhZHJ0Y997BwKlqepMXNEaWQHYp/biQPqLiVck66UD48vaw89MvQj5 g==; X-CSE-ConnectionGUID: nxuNLWDfS5yEeU/R0EMDiA== X-CSE-MsgGUID: 8pZqMPBiSw+v699MKkTFfA== X-IronPort-AV: E=McAfee;i="6700,10204,11264"; a="32596712" X-IronPort-AV: E=Sophos;i="6.12,175,1728975600"; d="scan'208";a="32596712" Received: from orviesa002.jf.intel.com ([10.64.159.142]) by orvoesa108.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Nov 2024 06:01:23 -0800 X-CSE-ConnectionGUID: WbzW5FAMTXWx2s3Fr+iYLw== X-CSE-MsgGUID: 8XmMjLTzRy6iwNjn1+Cmqw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.12,175,1728975600"; d="scan'208";a="121450789" Received: from smile.fi.intel.com ([10.237.72.154]) by orviesa002.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Nov 2024 06:01:22 -0800 Received: from andy by smile.fi.intel.com with local (Exim 4.98) (envelope-from ) id 1tEUDn-0000000HQuA-1SaB; Fri, 22 Nov 2024 16:01:19 +0200 Date: Fri, 22 Nov 2024 16:01:19 +0200 From: Andy Shevchenko To: linux-kernel@vger.kernel.org Cc: Mark Brown , Greg Kroah-Hartman , "Rafael J. Wysocki" Subject: Re: [PATCH v1 1/1] regmap: Synchronize cache for the page selector Message-ID: References: <20241122134734.1336768-1-andriy.shevchenko@linux.intel.com> 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: <20241122134734.1336768-1-andriy.shevchenko@linux.intel.com> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo On Fri, Nov 22, 2024 at 03:47:34PM +0200, Andy Shevchenko wrote: > If the selector register is represented in each page, its value > in accordance to the debugfs is stale because it gets synchronized > only after the real page switch happens. Synchronize cache for > the page selector. > > Before (offset followed by hexdump, the first byte is selector): > > // Real registers > 18: 05 ff 00 00 ff 0f 00 00 f0 00 00 00 > ... > // Virtual (per port) > 40: 05 ff 00 00 e0 e0 00 00 00 00 00 1f > 50: 00 ff 00 00 e0 e0 00 00 00 00 00 1f > 60: 01 ff 00 00 ff ff 00 00 00 00 00 00 > 70: 02 ff 00 00 cf f3 00 00 00 00 00 0c > 80: 03 ff 00 00 00 00 00 00 00 00 00 ff > 90: 04 ff 00 00 ff 0f 00 00 f0 00 00 00 > > After: > > // Real registers > 18: 05 ff 00 00 ff 0f 00 00 f0 00 00 00 > ... > // Virtual (per port) > 40: 00 ff 00 00 e0 e0 00 00 00 00 00 1f > 50: 01 ff 00 00 e0 e0 00 00 00 00 00 1f > 60: 02 ff 00 00 ff ff 00 00 00 00 00 00 > 70: 03 ff 00 00 cf f3 00 00 00 00 00 0c > 80: 04 ff 00 00 00 00 00 00 00 00 00 ff > 90: 05 ff 00 00 ff 0f 00 00 f0 00 00 00 Oh, while it works in my case, it is not the final (*) version I have! Scratch this, I'll send a v2. *) it has better check for the selector to be present in the virtual window. -- With Best Regards, Andy Shevchenko