From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758746AbaHZOUw (ORCPT ); Tue, 26 Aug 2014 10:20:52 -0400 Received: from mailout2.w1.samsung.com ([210.118.77.12]:23792 "EHLO mailout2.w1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758463AbaHZOSK (ORCPT ); Tue, 26 Aug 2014 10:18:10 -0400 X-AuditID: cbfec7f5-b7f776d000003e54-07-53fc971e6864 From: Tomasz Figa To: linux-samsung-soc@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Russell King - ARM Linux , Kukjin Kim , lauraa@codeaurora.org, linux-omap@vger.kernel.org, linus.walleij@linaro.org, santosh.shilimkar@ti.com, tony@atomide.com, drake@endlessm.com, Marek Szyprowski , Tomasz Figa , loeliger@gmail.com, Tomasz Figa Subject: [PATCH v4 2/7] ARM: l2c: Add interface to ask hypervisor to configure L2C Date: Tue, 26 Aug 2014 16:17:55 +0200 Message-id: <1409062680-15906-3-git-send-email-t.figa@samsung.com> X-Mailer: git-send-email 2.0.4 In-reply-to: <1409062680-15906-1-git-send-email-t.figa@samsung.com> References: <1409062680-15906-1-git-send-email-t.figa@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrILMWRmVeSWpSXmKPExsVy+t/xK7py0/8EG6ydr2fxaP5jZoveBVfZ LLZ3zmC3mPJnOZPFpsfXWC0u75rDZjF7ST+LxYzz+5gsbl/mtTi3fQuLxdojd9ktXvetYbZY P+M1i8WqXX8YLfZf8XLg92hp7mHz+PZ1EovH5b5eJo9F37M8ds66y+5x59oeNo/NS+o9+ras YvQ4fmM7k8fnTXIBXFFcNimpOZllqUX6dglcGQd/L2UqeMlX8aF5G1MD4wKeLkYODgkBE4kd 0/O7GDmBTDGJC/fWs3UxcnEICSxllJjw9R4LhNPHJHFl/Xd2kCo2ATWJzw2P2EBsEQFVic9t C8DizAIHmCXaVwaA2MICIRL7ZxxjAVnAAlQz47ExSJhXwEniYtcFdohlchKrNu5jArE5BZwl 9nzpYwaxhYBqnuzfxz6BkXcBI8MqRtHU0uSC4qT0XCO94sTc4tK8dL3k/NxNjJBg/rqDcekx q0OMAhyMSjy8D9J+BwuxJpYVV+YeYpTgYFYS4f2R9CdYiDclsbIqtSg/vqg0J7X4ECMTB6dU A+NSl3msy09tLn/p/Pr68fWtGl8ULrLtjjvt/F5T4E4ny/uGCUf9noZ949bedmvnvfpIe5nr E92KmGfPeLfnz5GoNUaGv2cva46q41GUFA/p47uopvkhzjLz1F4Bnybryyvfii1aU/53T+7N Ot+JTh0ckxOTFueVP5VbkN1xUUDu2OMtl99IZUxWYinOSDTUYi4qTgQAX6pZ3UQCAAA= Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- 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 891a56b..563b92f 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 b073563..84c6c55 100644 --- a/arch/arm/mm/cache-l2x0.c +++ b/arch/arm/mm/cache-l2x0.c @@ -109,6 +109,11 @@ 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); @@ -909,6 +914,7 @@ 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); -- 2.0.4