From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754041AbbAEMWB (ORCPT ); Mon, 5 Jan 2015 07:22:01 -0500 Received: from mailout1.w1.samsung.com ([210.118.77.11]:44306 "EHLO mailout1.w1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753324AbbAEMTV (ORCPT ); Mon, 5 Jan 2015 07:19:21 -0500 X-AuditID: cbfec7f5-b7fc86d0000066b7-8f-54aa81481a9d 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, linux-omap@vger.kernel.org, Arnd Bergmann , Olof Johansson , Russell King - ARM Linux , Kukjin Kim , lauraa@codeaurora.org, linus.walleij@linaro.org, tony@atomide.com, drake@endlessm.com, loeliger@gmail.com, Mark Rutland , nm@ti.com, khilman@linaro.org Subject: [PATCH v11 4/9] ARM: l2c: Add interface to ask hypervisor to configure L2C Date: Mon, 05 Jan 2015 13:19:03 +0100 Message-id: <1420460348-20302-5-git-send-email-m.szyprowski@samsung.com> X-Mailer: git-send-email 1.9.2 In-reply-to: <1420460348-20302-1-git-send-email-m.szyprowski@samsung.com> References: <1420460348-20302-1-git-send-email-m.szyprowski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrGLMWRmVeSWpSXmKPExsVy+t/xK7oejatCDJYv07L4O+kYu8Wj+Y+Z LXoXXGWz+Hp4BaPF2aY37BbbO2ewW0z5s5zJYtPja6wWl3fNYbOYvaSfxWLG+X1MFrcv81qc 276FxWLtkbvsFkuvX2SyePPjLJPFqeuf2SxW7frDaLH/ipeDsMeaeWsYPVqae9g8fv+axOjx 7eskFo/Lfb1MHou+Z3nsnHWX3ePOtT1sHpuX1HtcOdHE6tG3ZRWjx/Eb25k8Pm+SC+CN4rJJ Sc3JLEst0rdL4MpY8nk1U8Fj/opNM66wNjD28XYxcnJICJhITFjTyQhhi0lcuLeerYuRi0NI YCmjxOEtD5kgnD4mia1Tr7CCVLEJGEp0ve1iA7FFBNwk/q07BNbBLDCNRWLTkfPMIAlhgVCJ GRtPA3VzcLAIqEqcXsIJEuYV8JD413aTBWKbnMT/lyuYQGxOAU+JpXv3sYPYQkA1Z26tZZ/A yLuAkWEVo2hqaXJBcVJ6rpFecWJucWleul5yfu4mRkhcfN3BuPSY1SFGAQ5GJR5ejxMrQ4RY E8uKK3MPMUpwMCuJ8L5KXxUixJuSWFmVWpQfX1Sak1p8iJGJg1OqgdHt7Yke7S49/gj9M8/u z73D3MT6u5XVtHjrUUbuhrn1/cF3r+75weRz13l5bmnxsfVrLr554Ou3/6zs/Kl12bdXLGPn qi07UC0/ZYG95bkDr7mP5Mk2NCtduLq+nzmZf2ZwQ9wBb09V0yf5kUtXJj0r+jvHZ9ubzgXL VwZ83e/4dDGLD9eGO9+VWIozEg21mIuKEwEghAkkaQIAAA== 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 f9013320c8ce..dcde6086a228 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