From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753334AbbAEQ11 (ORCPT ); Mon, 5 Jan 2015 11:27:27 -0500 Received: from mho-03-ewr.mailhop.org ([204.13.248.66]:54521 "EHLO mho-01-ewr.mailhop.org" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751318AbbAEQ10 (ORCPT ); Mon, 5 Jan 2015 11:27:26 -0500 X-Mail-Handler: Dyn Standard SMTP by Dyn X-Originating-IP: 104.193.169.186 X-Report-Abuse-To: abuse@dyndns.com (see http://www.dyndns.com/services/sendlabs/outbound_abuse.html for abuse reporting information) X-MHO-User: U2FsdGVkX19aGHW9BXmcyvOXLKvIs+Hi Date: Mon, 5 Jan 2015 08:23:34 -0800 From: Tony Lindgren To: Marek Szyprowski Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Tomasz Figa , Kyungmin Park , linux-samsung-soc@vger.kernel.org, linux-omap@vger.kernel.org, Arnd Bergmann , Olof Johansson , Russell King - ARM Linux , Kukjin Kim , lauraa@codeaurora.org, linus.walleij@linaro.org, drake@endlessm.com, loeliger@gmail.com, Mark Rutland , nm@ti.com, khilman@linaro.org Subject: Re: [PATCH v11 3/9] ARM: l2c: Refactor the driver to use commit-like interface Message-ID: <20150105162332.GC4081@atomide.com> References: <1420460348-20302-1-git-send-email-m.szyprowski@samsung.com> <1420460348-20302-4-git-send-email-m.szyprowski@samsung.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1420460348-20302-4-git-send-email-m.szyprowski@samsung.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Marek Szyprowski [150105 04:22]: > From: Tomasz Figa > > Certain implementations of secure hypervisors (namely the one found on > Samsung Exynos-based boards) do not provide access to individual L2C > registers. This makes the .write_sec()-based interface insufficient and > provoking ugly hacks. > > This patch is first step to make the driver not rely on availability of > writes to individual registers. This is achieved by refactoring the > driver to use a commit-like operation scheme: all register values are > prepared first and stored in an instance of l2x0_regs struct and then a > single callback is responsible to flush those values to the hardware. > > Signed-off-by: Tomasz Figa > [mszyprow: rebased onto 'ARM: l2c: use l2c_write_sec() for restoring > latency and filter regs' patch] > Signed-off-by: Marek Szyprowski This version seems to boot just fine on am437x here: Acked-by: Tony Lindgren