From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753421AbbAEQ2c (ORCPT ); Mon, 5 Jan 2015 11:28:32 -0500 Received: from mho-03-ewr.mailhop.org ([204.13.248.66]:56550 "EHLO mho-01-ewr.mailhop.org" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752753AbbAEQ2b (ORCPT ); Mon, 5 Jan 2015 11:28:31 -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: U2FsdGVkX1+Nkkw/nNEQRNEI6C07n04o Date: Mon, 5 Jan 2015 08:24:38 -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 4/9] ARM: l2c: Add interface to ask hypervisor to configure L2C Message-ID: <20150105162438.GD4081@atomide.com> References: <1420460348-20302-1-git-send-email-m.szyprowski@samsung.com> <1420460348-20302-5-git-send-email-m.szyprowski@samsung.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1420460348-20302-5-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 > > 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 Acked-by: Tony Lindgren > --- > 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 >