firmware: Move Trusted Foundations support

Move the Trusted Foundations support out of arch/arm/firmware and into
drivers/firmware where most other firmware support implementations are
located.
Signed-off-by: Thierry Reding <treding@nvidia.com>

arch/arm/Kconfig

@@ -899,8 +899,6 @@ config PLAT_PXA
 config PLAT_VERSATILE
 	bool
 
-source "arch/arm/firmware/Kconfig"
-
 source "arch/arm/mm/Kconfig"
 
 config IWMMXT

arch/arm/Makefile

@@ -290,7 +290,6 @@ core-y				+= arch/arm/kernel/ arch/arm/mm/ arch/arm/common/
 core-y				+= arch/arm/probes/
 core-y				+= arch/arm/net/
 core-y				+= arch/arm/crypto/
-core-y				+= arch/arm/firmware/
 core-y				+= $(machdirs) $(platdirs)
 
 drivers-$(CONFIG_OPROFILE)      += arch/arm/oprofile/

arch/arm/firmware/Kconfig

-config ARCH_SUPPORTS_FIRMWARE
-	bool
-
-config ARCH_SUPPORTS_TRUSTED_FOUNDATIONS
-	bool
-	select ARCH_SUPPORTS_FIRMWARE
-
-menu "Firmware options"
-	depends on ARCH_SUPPORTS_FIRMWARE
-
-config TRUSTED_FOUNDATIONS
-	bool "Trusted Foundations secure monitor support"
-	depends on ARCH_SUPPORTS_TRUSTED_FOUNDATIONS
-	default y
-	help
-	  Some devices (including most Tegra-based consumer devices on the
-	  market) are booted with the Trusted Foundations secure monitor
-	  active, requiring some core operations to be performed by the secure
-	  monitor instead of the kernel.
-
-	  This option allows the kernel to invoke the secure monitor whenever
-	  required on devices using Trusted Foundations. See
-	  arch/arm/include/asm/trusted_foundations.h or the
-	  tlm,trusted-foundations device tree binding documentation for details
-	  on how to use it.
-
-	  Say n if you don't know what this is about.
-
-endmenu

arch/arm/firmware/Makefile

-obj-$(CONFIG_TRUSTED_FOUNDATIONS)	+= trusted_foundations.o
-
-# tf_generic_smc() fails to build with -fsanitize-coverage=trace-pc
-KCOV_INSTRUMENT                := n

arch/arm/mach-tegra/Kconfig

@@ -3,7 +3,6 @@ menuconfig ARCH_TEGRA
 	bool "NVIDIA Tegra"
 	depends on ARCH_MULTI_V7
 	select ARCH_HAS_RESET_CONTROLLER
-	select ARCH_SUPPORTS_TRUSTED_FOUNDATIONS
 	select ARM_AMBA
 	select ARM_GIC
 	select CLKSRC_MMIO

arch/arm/mach-tegra/cpuidle-tegra114.c

@@ -21,10 +21,11 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 
+#include <linux/firmware/trusted_foundations.h>
+
 #include <asm/cpuidle.h>
 #include <asm/smp_plat.h>
 #include <asm/suspend.h>
-#include <asm/trusted_foundations.h>
 #include <asm/psci.h>
 
 #include "cpuidle.h"

arch/arm/mach-tegra/pm.c

@@ -27,6 +27,8 @@
 #include <linux/spinlock.h>
 #include <linux/suspend.h>
 
+#include <linux/firmware/trusted_foundations.h>
+
 #include <soc/tegra/flowctrl.h>
 #include <soc/tegra/fuse.h>
 #include <soc/tegra/pm.h>
@@ -39,7 +41,6 @@
 #include <asm/smp_plat.h>
 #include <asm/suspend.h>
 #include <asm/tlbflush.h>
-#include <asm/trusted_foundations.h>
 
 #include "iomap.h"
 #include "pm.h"

arch/arm/mach-tegra/reset.c

@@ -19,12 +19,13 @@
 #include <linux/init.h>
 #include <linux/io.h>
 
+#include <linux/firmware/trusted_foundations.h>
+
 #include <soc/tegra/fuse.h>
 
 #include <asm/cacheflush.h>
 #include <asm/firmware.h>
 #include <asm/hardware/cache-l2x0.h>
-#include <asm/trusted_foundations.h>
 
 #include "iomap.h"
 #include "irammap.h"

arch/arm/mach-tegra/tegra.c

@@ -35,6 +35,8 @@
 #include <linux/sys_soc.h>
 #include <linux/usb/tegra_usb_phy.h>
 
+#include <linux/firmware/trusted_foundations.h>
+
 #include <soc/tegra/fuse.h>
 #include <soc/tegra/pmc.h>
 
@@ -44,7 +46,6 @@
 #include <asm/mach/time.h>
 #include <asm/mach-types.h>
 #include <asm/setup.h>
-#include <asm/trusted_foundations.h>
 
 #include "board.h"
 #include "common.h"

drivers/firmware/Kconfig

@@ -267,6 +267,22 @@ config TI_SCI_PROTOCOL
 	  This protocol library is used by client drivers to use the features
 	  provided by the system controller.
 
+config TRUSTED_FOUNDATIONS
+	bool "Trusted Foundations secure monitor support"
+	depends on ARM
+	help
+	  Some devices (including most early Tegra-based consumer devices on
+	  the market) are booted with the Trusted Foundations secure monitor
+	  active, requiring some core operations to be performed by the secure
+	  monitor instead of the kernel.
+
+	  This option allows the kernel to invoke the secure monitor whenever
+	  required on devices using Trusted Foundations. See the functions and
+	  comments in linux/firmware/trusted_foundations.h or the device tree
+	  bindings for "tlm,trusted-foundations" for details on how to use it.
+
+	  Choose N if you don't know what this is about.
+
 config HAVE_ARM_SMCCC
 	bool
 

drivers/firmware/Makefile

@@ -23,6 +23,7 @@ obj-$(CONFIG_QCOM_SCM_64)	+= qcom_scm-64.o
 obj-$(CONFIG_QCOM_SCM_32)	+= qcom_scm-32.o
 CFLAGS_qcom_scm-32.o :=$(call as-instr,.arch armv7-a\n.arch_extension sec,-DREQUIRES_SEC=1) -march=armv7-a
 obj-$(CONFIG_TI_SCI_PROTOCOL)	+= ti_sci.o
+obj-$(CONFIG_TRUSTED_FOUNDATIONS) += trusted_foundations.o
 
 obj-$(CONFIG_ARM_SCMI_PROTOCOL)	+= arm_scmi/
 obj-y				+= broadcom/

arch/arm/firmware/trusted_foundations.c → drivers/firmware/trusted_foundations.c

@@ -17,10 +17,12 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/of.h>
+
+#include <linux/firmware/trusted_foundations.h>
+
 #include <asm/firmware.h>
 #include <asm/hardware/cache-l2x0.h>
 #include <asm/outercache.h>
-#include <asm/trusted_foundations.h>
 
 #define TF_CACHE_MAINT		0xfffff100
 

arch/arm/include/asm/trusted_foundations.h → include/linux/firmware/trusted_foundations.h

@@ -23,8 +23,8 @@
  * PSCI standard.
  */
 
-#ifndef __ASM_ARM_TRUSTED_FOUNDATIONS_H
-#define __ASM_ARM_TRUSTED_FOUNDATIONS_H
+#ifndef __FIRMWARE_TRUSTED_FOUNDATIONS_H
+#define __FIRMWARE_TRUSTED_FOUNDATIONS_H
 
 #include <linux/printk.h>
 #include <linux/bug.h>