ARM: 8260/1: l2c: Add interface to ask hypervisor to configure L2C (c6d1a2d0) · Commits · 戴 / test

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@samsung.com> Signed-off-by:

Marek Szyprowski <m.szyprowski@samsung.com> Tested-by:

Nishanth Menon <nm@ti.com> Acked-by:

Tony Lindgren <tony@atomide.com> Signed-off-by:

Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/include/asm/outercache.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -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;

arch/arm/mm/cache-l2x0.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -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);

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