Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752736AbaKQLvX (ORCPT ); Mon, 17 Nov 2014 06:51:23 -0500 Received: from mailout3.w1.samsung.com ([210.118.77.13]:45475 "EHLO mailout3.w1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751933AbaKQLsk (ORCPT ); Mon, 17 Nov 2014 06:48:40 -0500 X-AuditID: cbfec7f5-b7f956d000005ed7-25-5469e09484be From: Marek Szyprowski To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Marek Szyprowski , Tomasz Figa , Kyungmin Park , linux-samsung-soc@vger.kernel.org, Arnd Bergmann , Olof Johansson , Russell King - ARM Linux , Kukjin Kim , lauraa@codeaurora.org, linux-omap@vger.kernel.org, linus.walleij@linaro.org, tony@atomide.com, drake@endlessm.com, loeliger@gmail.com, Mark Rutland Subject: [PATCH v9 2/7] ARM: l2c: Add interface to ask hypervisor to configure L2C Date: Mon, 17 Nov 2014 12:48:24 +0100 Message-id: <1416224909-4290-3-git-send-email-m.szyprowski@samsung.com> X-Mailer: git-send-email 1.9.2 In-reply-to: <1416224909-4290-1-git-send-email-m.szyprowski@samsung.com> References: <1416224909-4290-1-git-send-email-m.szyprowski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrGLMWRmVeSWpSXmKPExsVy+t/xK7pTHmSGGMxsULX4O+kYu8Wj+Y+Z LXoXXGWzONv0ht1ie+cMdospf5YzWWx6fI3V4vKuOWwWs5f0s1jMOL+PyeL2ZV6Lc9u3sFis PXKX3WLp9YtMFqeuf2azWLXrD6PF/iteDoIea+atYfRoae5h8/j9axKjx7evk1g8Lvf1Mnks +p7lsXPWXXaPO9f2sHlsXlLvceVEE6tH35ZVjB6fN8kF8ERx2aSk5mSWpRbp2yVwZcyd2s5S 8Ji/Yvr2CcwNjH28XYycHBICJhKzV6xmh7DFJC7cW8/WxcjFISSwlFHi0NWTTBBOH5PEmWfr mUCq2AQMJbredrGB2CICbhL/1h0C62AW+MwscenRGtYuRg4OYYEQiTuTLUBqWARUJTr39jGC 2LwC7hI/p59igtgmJ/H/5Qowm1PAQ+Lb9wNsIK1CQDWtjzgnMPIuYGRYxSiaWppcUJyUnmuk V5yYW1yal66XnJ+7iRES9l93MC49ZnWIUYCDUYmH90BRZogQa2JZcWXuIUYJDmYlEd6Yi0Ah 3pTEyqrUovz4otKc1OJDjEwcnFINjB2PlFNz7C849cwRyMuav/yx4Ie9q+fvWcaodddrgaNx pP+DfZ+7VCuOLLDu0Ml/cEk5SLzlVJ1huWiauZiR3cZvnL9miRlpnJqYs9TPaqvTjhX6l1ym J5S8a7nxKmrd640LAqfM2ftwQm2T/4HlPwPnlR+4rfhd5fLf05IvOY5u6FmQF7jr+HwlluKM REMt5qLiRACfIYPnWQIAAA== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Tomasz Figa Because certain secure hypervisor do not allow writes to individual L2C registers, but rather expect set of parameters to be passed as argument to secure monitor calls, there is a need to provide an interface for the L2C driver to ask the firmware to configure the hardware according to specified parameters. This patch adds such. Signed-off-by: Tomasz Figa Signed-off-by: Marek Szyprowski --- arch/arm/include/asm/outercache.h | 3 +++ arch/arm/mm/cache-l2x0.c | 6 ++++++ 2 files changed, 9 insertions(+) diff --git a/arch/arm/include/asm/outercache.h b/arch/arm/include/asm/outercache.h index 891a56b35bcf..563b92fc2f41 100644 --- a/arch/arm/include/asm/outercache.h +++ b/arch/arm/include/asm/outercache.h @@ -23,6 +23,8 @@ #include +struct l2x0_regs; + struct outer_cache_fns { void (*inv_range)(unsigned long, unsigned long); void (*clean_range)(unsigned long, unsigned long); @@ -36,6 +38,7 @@ struct outer_cache_fns { /* This is an ARM L2C thing */ void (*write_sec)(unsigned long, unsigned); + void (*configure)(const struct l2x0_regs *); }; extern struct outer_cache_fns outer_cache; diff --git a/arch/arm/mm/cache-l2x0.c b/arch/arm/mm/cache-l2x0.c index e5948c5adaa7..d214be207517 100644 --- a/arch/arm/mm/cache-l2x0.c +++ b/arch/arm/mm/cache-l2x0.c @@ -110,6 +110,11 @@ static inline void l2c_unlock(void __iomem *base, unsigned num) static void l2c_configure(void __iomem *base) { + if (outer_cache.configure) { + outer_cache.configure(&l2x0_saved_regs); + return; + } + if (l2x0_data->configure) l2x0_data->configure(base); @@ -910,6 +915,7 @@ static int __init __l2c_init(const struct l2c_init_data *data, fns = data->outer_cache; fns.write_sec = outer_cache.write_sec; + fns.configure = outer_cache.configure; if (data->fixup) data->fixup(l2x0_base, cache_id, &fns); -- 1.9.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/