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Date: Mon, 27 Oct 2014 12:05:45 +0100 From: Marek Szyprowski <m.szyprowski@...sung.com> To: linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linux-samsung-soc@...r.kernel.org Cc: Marek Szyprowski <m.szyprowski@...sung.com>, Tomasz Figa <tomasz.figa@...il.com>, Kyungmin Park <kyungmin.park@...sung.com>, Russell King - ARM Linux <linux@....linux.org.uk>, Kukjin Kim <kgene.kim@...sung.com>, lauraa@...eaurora.org, linux-omap@...r.kernel.org, linus.walleij@...aro.org, santosh.shilimkar@...com, tony@...mide.com, drake@...lessm.com, loeliger@...il.com, Mark Rutland <mark.rutland@....com> Subject: [PATCH v6 2/7] ARM: l2c: Add interface to ask hypervisor to configure L2C From: Tomasz Figa <t.figa@...sung.com> 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 <t.figa@...sung.com> Signed-off-by: Marek Szyprowski <m.szyprowski@...sung.com> --- 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 <linux/types.h> +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 4286ee9bb3bd..ad981894de73 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@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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