16 files changed, 212 insertions, 59 deletions

diff --git a/Documentation/devicetree/bindings/arm/l2c2x0.txt b/Documentation/devicetree/bindings/arm/l2c2x0.txt
index 917199f17965..d9650c1788f4 100644
--- a/Documentation/devicetree/bindings/arm/l2c2x0.txt
+++ b/Documentation/devicetree/bindings/arm/l2c2x0.txt
@@ -90,6 +90,9 @@ Optional properties:
 - arm,standby-mode: L2 standby mode enable. Value <0> (forcibly disable),
   <1> (forcibly enable), property absent (OS specific behavior,
   preferably retain firmware settings)
+- arm,early-bresp-disable : Disable the CA9 optimization Early BRESP (PL310)
+- arm,full-line-zero-disable : Disable the CA9 optimization Full line of zero
+  write (PL310)
 
 Example:
 
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 8a7ab5e73af9..4c6816be23a9 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -27,6 +27,7 @@ config ARM
         select GENERIC_ALLOCATOR
         select GENERIC_ATOMIC64 if (CPU_V7M || CPU_V6 || !CPU_32v6K || !AEABI)
         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
+        select GENERIC_CPU_AUTOPROBE
         select GENERIC_EARLY_IOREMAP
         select GENERIC_IDLE_POLL_SETUP
         select GENERIC_IRQ_PROBE
diff --git a/arch/arm/boot/dts/r7s72100.dtsi b/arch/arm/boot/dts/r7s72100.dtsi
index b8aa256bd515..1cf2bd038090 100644
--- a/arch/arm/boot/dts/r7s72100.dtsi
+++ b/arch/arm/boot/dts/r7s72100.dtsi
@@ -177,6 +177,7 @@
                         compatible = "arm,cortex-a9";
                         reg = <0>;
                         clock-frequency = <400000000>;
+                        next-level-cache = <&L2>;
                 };
         };
 
@@ -368,6 +369,16 @@
                         <0xe8202000 0x1000>;
         };
 
+        L2: cache-controller@3ffff000 {
+                compatible = "arm,pl310-cache";
+                reg = <0x3ffff000 0x1000>;
+                interrupts = <GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>;
+                arm,early-bresp-disable;
+                arm,full-line-zero-disable;
+                cache-unified;
+                cache-level = <2>;
+        };
+
         i2c0: i2c@fcfee000 {
                 #address-cells = <1>;
                 #size-cells = <0>;
diff --git a/arch/arm/include/asm/cpufeature.h b/arch/arm/include/asm/cpufeature.h
new file mode 100644
index 000000000000..6d425191d01d
--- /dev/null
+++ b/arch/arm/include/asm/cpufeature.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2017 Linaro Ltd. <ard.biesheuvel@linaro.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __ASM_CPUFEATURE_H
+#define __ASM_CPUFEATURE_H
+
+#include <linux/log2.h>
+#include <asm/hwcap.h>
+
+/*
+ * Due to the fact that ELF_HWCAP is a 32-bit type on ARM, and given the number
+ * of optional CPU features it defines, ARM's CPU hardware capability bits have
+ * been distributed over separate elf_hwcap and elf_hwcap2 variables, each of
+ * which covers a subset of the available CPU features.
+ *
+ * Currently, only a few of those are suitable for automatic module loading
+ * (which is the primary use case of this facility) and those happen to be all
+ * covered by HWCAP2. So let's only cover those via the cpu_feature()
+ * convenience macro for now (which is used by module_cpu_feature_match()).
+ * However, all capabilities are exposed via the modalias, and can be matched
+ * using an explicit MODULE_DEVICE_TABLE() that uses __hwcap_feature() directly.
+ */
+#define MAX_CPU_FEATURES        64
+#define __hwcap_feature(x)      ilog2(HWCAP_ ## x)
+#define __hwcap2_feature(x)     (32 + ilog2(HWCAP2_ ## x))
+#define cpu_feature(x)          __hwcap2_feature(x)
+
+static inline bool cpu_have_feature(unsigned int num)
+{
+        return num < 32 ? elf_hwcap & BIT(num) : elf_hwcap2 & BIT(num - 32);
+}
+
+#endif
diff --git a/arch/arm/include/asm/fixmap.h b/arch/arm/include/asm/fixmap.h
index 5c17d2dec777..8f967d1373f6 100644
--- a/arch/arm/include/asm/fixmap.h
+++ b/arch/arm/include/asm/fixmap.h
@@ -41,7 +41,7 @@ static const enum fixed_addresses __end_of_fixed_addresses =
 
 #define FIXMAP_PAGE_COMMON      (L_PTE_YOUNG | L_PTE_PRESENT | L_PTE_XN | L_PTE_DIRTY)
 
-#define FIXMAP_PAGE_NORMAL      (FIXMAP_PAGE_COMMON | L_PTE_MT_WRITEBACK)
+#define FIXMAP_PAGE_NORMAL      (pgprot_kernel | L_PTE_XN)
 #define FIXMAP_PAGE_RO          (FIXMAP_PAGE_NORMAL | L_PTE_RDONLY)
 
 /* Used by set_fixmap_(io|nocache), both meant for mapping a device */
diff --git a/arch/arm/include/asm/module.h b/arch/arm/include/asm/module.h
index 464748b9fd7d..ed2319663a1e 100644
--- a/arch/arm/include/asm/module.h
+++ b/arch/arm/include/asm/module.h
@@ -18,13 +18,18 @@ enum {
 };
 #endif
 
+struct mod_plt_sec {
+        struct elf32_shdr       *plt;
+        int                     plt_count;
+};
+
 struct mod_arch_specific {
 #ifdef CONFIG_ARM_UNWIND
         struct unwind_table *unwind[ARM_SEC_MAX];
 #endif
 #ifdef CONFIG_ARM_MODULE_PLTS
-        struct elf32_shdr   *plt;
-        int                 plt_count;
+        struct mod_plt_sec      core;
+        struct mod_plt_sec      init;
 #endif
 };
 
diff --git a/arch/arm/kernel/ftrace.c b/arch/arm/kernel/ftrace.c
index 3f1759411d51..414e60ed0257 100644
--- a/arch/arm/kernel/ftrace.c
+++ b/arch/arm/kernel/ftrace.c
@@ -29,11 +29,6 @@
 #endif
 
 #ifdef CONFIG_DYNAMIC_FTRACE
-#ifdef CONFIG_OLD_MCOUNT
-#define OLD_MCOUNT_ADDR ((unsigned long) mcount)
-#define OLD_FTRACE_ADDR ((unsigned long) ftrace_caller_old)
-
-#define OLD_NOP         0xe1a00000      /* mov r0, r0 */
 
 static int __ftrace_modify_code(void *data)
 {
@@ -51,6 +46,12 @@ void arch_ftrace_update_code(int command)
         stop_machine(__ftrace_modify_code, &command, NULL);
 }
 
+#ifdef CONFIG_OLD_MCOUNT
+#define OLD_MCOUNT_ADDR ((unsigned long) mcount)
+#define OLD_FTRACE_ADDR ((unsigned long) ftrace_caller_old)
+
+#define OLD_NOP         0xe1a00000      /* mov r0, r0 */
+
 static unsigned long ftrace_nop_replace(struct dyn_ftrace *rec)
 {
         return rec->arch.old_mcount ? OLD_NOP : NOP;
diff --git a/arch/arm/kernel/module-plts.c b/arch/arm/kernel/module-plts.c
index 3a5cba90c971..3d0c2e4dda1d 100644
--- a/arch/arm/kernel/module-plts.c
+++ b/arch/arm/kernel/module-plts.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2014 Linaro Ltd. <ard.biesheuvel@linaro.org>
+ * Copyright (C) 2014-2017 Linaro Ltd. <ard.biesheuvel@linaro.org>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
@@ -31,9 +31,17 @@ struct plt_entries {
         u32     lit[PLT_ENT_COUNT];
 };
 
+st