Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm

Pull ARM updates from Russell King:
 "This set includes adding support for Neon acceleration of RAID6 XOR
  code from Ard Biesheuvel, cache flushing and barrier updates from Will
  Deacon, and a cleanup to the ARM debug code which reduces the amount
  of code by about 500 lines.

  A few other cleanups, such as constifying the machine descriptors
  which already shouldn't be written to, cleaning up the printing of the
  L2 cache size"

* 'for-linus' of git://git.linaro.org/people/rmk/linux-arm: (55 commits)
  ARM: 7826/1: debug: support debug ll on hisilicon soc
  ARM: 7830/1: delay: don't bother reporting bogomips in /proc/cpuinfo
  ARM: 7829/1: Add ".text.unlikely" and ".text.hot" to arm unwind tables
  ARM: 7828/1: ARMv7-M: implement restart routine common to all v7-M machines
  ARM: 7827/1: highbank: fix debug uart virtual address for LPAE
  ARM: 7823/1: errata: workaround Cortex-A15 erratum 773022
  ARM: 7806/1: allow DEBUG_UNCOMPRESS for Tegra
  ARM: 7793/1: debug: use generic option for ep93xx PL10x debug port
  ARM: debug: move SPEAr debug to generic PL01x code
  ARM: debug: move davinci debug to generic 8250 code
  ARM: debug: move keystone debug to generic 8250 code
  ARM: debug: remove DEBUG_ROCKCHIP_UART
  ARM: debug: provide generic option choices for 8250 and PL01x ports
  ARM: debug: move PL01X debug include into arch/arm/include/debug/
  ARM: debug: provide PL01x debug uart phys/virt address configuration options
  ARM: debug: add support for word accesses to debug/8250.S
  ARM: debug: move 8250 debug include into arch/arm/include/debug/
  ARM: debug: provide 8250 debug uart phys/virt address configuration options
  ARM: debug: provide 8250 debug uart register shift configuration option
  ARM: debug: provide 8250 debug uart flow control configuration option
  ...

12 files changed, 105 insertions, 58 deletions

diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile
index 86d10dd47dc4..5140df5f23aa 100644
--- a/arch/arm/kernel/Makefile
+++ b/arch/arm/kernel/Makefile
@@ -24,7 +24,7 @@ obj-$(CONFIG_ATAGS_PROC)	+= atags_proc.o
 obj-$(CONFIG_DEPRECATED_PARAM_STRUCT) += atags_compat.o
 
 ifeq ($(CONFIG_CPU_V7M),y)
-obj-y           += entry-v7m.o
+obj-y           += entry-v7m.o v7m.o
 else
 obj-y           += entry-armv.o
 endif
diff --git a/arch/arm/kernel/atags.h b/arch/arm/kernel/atags.h
index 9edc9692332d..ec4164da6e30 100644
--- a/arch/arm/kernel/atags.h
+++ b/arch/arm/kernel/atags.h
@@ -7,9 +7,10 @@ static inline void save_atags(struct tag *tags) { }
 void convert_to_tag_list(struct tag *tags);
 
 #ifdef CONFIG_ATAGS
-struct machine_desc *setup_machine_tags(phys_addr_t __atags_pointer, unsigned int machine_nr);
+const struct machine_desc *setup_machine_tags(phys_addr_t __atags_pointer,
+        unsigned int machine_nr);
 #else
-static inline struct machine_desc *
+static inline const struct machine_desc *
 setup_machine_tags(phys_addr_t __atags_pointer, unsigned int machine_nr)
 {
         early_print("no ATAGS support: can't continue\n");
diff --git a/arch/arm/kernel/atags_parse.c b/arch/arm/kernel/atags_parse.c
index 14512e6931d8..8c14de8180c0 100644
--- a/arch/arm/kernel/atags_parse.c
+++ b/arch/arm/kernel/atags_parse.c
@@ -178,11 +178,11 @@ static void __init squash_mem_tags(struct tag *tag)
                         tag->hdr.tag = ATAG_NONE;
 }
 
-struct machine_desc * __init setup_machine_tags(phys_addr_t __atags_pointer,
-                                                unsigned int machine_nr)
+const struct machine_desc * __init
+setup_machine_tags(phys_addr_t __atags_pointer, unsigned int machine_nr)
 {
         struct tag *tags = (struct tag *)&default_tags;
-        struct machine_desc *mdesc = NULL, *p;
+        const struct machine_desc *mdesc = NULL, *p;
         char *from = default_command_line;
 
         default_tags.mem.start = PHYS_OFFSET;
diff --git a/arch/arm/kernel/devtree.c b/arch/arm/kernel/devtree.c
index 2ee8a17d2b01..f35906b3d8c9 100644
--- a/arch/arm/kernel/devtree.c
+++ b/arch/arm/kernel/devtree.c
@@ -181,10 +181,10 @@ bool arch_match_cpu_phys_id(int cpu, u64 phys_id)
  * If a dtb was passed to the kernel in r2, then use it to choose the
  * correct machine_desc and to setup the system.
  */
-struct machine_desc * __init setup_machine_fdt(unsigned int dt_phys)
+const struct machine_desc * __init setup_machine_fdt(unsigned int dt_phys)
 {
         struct boot_param_header *devtree;
-        struct machine_desc *mdesc, *mdesc_best = NULL;
+        const struct machine_desc *mdesc, *mdesc_best = NULL;
         unsigned int score, mdesc_score = ~1;
         unsigned long dt_root;
         const char *model;
@@ -193,7 +193,7 @@ struct machine_desc * __init setup_machine_fdt(unsigned int dt_phys)
         DT_MACHINE_START(GENERIC_DT, "Generic DT based system")
         MACHINE_END
 
-        mdesc_best = (struct machine_desc *)&__mach_desc_GENERIC_DT;
+        mdesc_best = &__mach_desc_GENERIC_DT;
 #endif
 
         if (!dt_phys)
diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S
index 94104bf69719..74ad15d1a065 100644
--- a/arch/arm/kernel/entry-common.S
+++ b/arch/arm/kernel/entry-common.S
@@ -442,10 +442,10 @@ local_restart:
         ldrcc   pc, [tbl, scno, lsl #2]         @ call sys_* routine
 
         add     r1, sp, #S_OFF
-2:      mov     why, #0                         @ no longer a real syscall
         cmp     scno, #(__ARM_NR_BASE - __NR_SYSCALL_BASE)
         eor     r0, scno, #__NR_SYSCALL_BASE    @ put OS number back
-        bcs     arm_syscall     
+        bcs     arm_syscall
+2:      mov     why, #0                         @ no longer a real syscall
         b       sys_ni_syscall                  @ not private func
 
 #if defined(CONFIG_OABI_COMPAT) || !defined(CONFIG_AEABI)
diff --git a/arch/arm/kernel/module.c b/arch/arm/kernel/module.c
index 85c3fb6c93c2..084dc8896986 100644
--- a/arch/arm/kernel/module.c
+++ b/arch/arm/kernel/module.c
@@ -292,12 +292,20 @@ int module_finalize(const Elf32_Ehdr *hdr, const Elf_Shdr *sechdrs,
                         maps[ARM_SEC_CORE].unw_sec = s;
                 else if (strcmp(".ARM.exidx.exit.text", secname) == 0)
                         maps[ARM_SEC_EXIT].unw_sec = s;
+                else if (strcmp(".ARM.exidx.text.unlikely", secname) == 0)
+                        maps[ARM_SEC_UNLIKELY].unw_sec = s;
+                else if (strcmp(".ARM.exidx.text.hot", secname) == 0)
+                        maps[ARM_SEC_HOT].unw_sec = s;
                 else if (strcmp(".init.text", secname) == 0)
                         maps[ARM_SEC_INIT].txt_sec = s;
                 else if (strcmp(".text", secname) == 0)
                         maps[ARM_SEC_CORE].txt_sec = s;
                 else if (strcmp(".exit.text", secname) == 0)
                         maps[ARM_SEC_EXIT].txt_sec = s;
+                else if (strcmp(".text.unlikely", secname) == 0)
+                        maps[ARM_SEC_UNLIKELY].txt_sec = s;
+                else if (strcmp(".text.hot", secname) == 0)
+                        maps[ARM_SEC_HOT].txt_sec = s;
         }
 
         for (i = 0; i < ARM_SEC_MAX; i++)
diff --git a/arch/arm/kernel/perf_event_cpu.c b/arch/arm/kernel/perf_event_cpu.c
index aebe0e99c153..8d6147b2001f 100644
--- a/arch/arm/kernel/perf_event_cpu.c
+++ b/arch/arm/kernel/perf_event_cpu.c
@@ -118,7 +118,8 @@ static int cpu_pmu_request_irq(struct arm_pmu *cpu_pmu, irq_handler_t handler)
                         continue;
                 }
 
-                err = request_irq(irq, handler, IRQF_NOBALANCING, "arm-pmu",
+                err = request_irq(irq, handler,
+                                  IRQF_NOBALANCING | IRQF_NO_THREAD, "arm-pmu",
                                   cpu_pmu);
                 if (err) {
                         pr_err("unable to request IRQ%d for ARM PMU counters\n",
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index afc2489ee13b..0e1e2b3afa45 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -72,10 +72,10 @@ static int __init fpe_setup(char *line)
 __setup("fpe=", fpe_setup);
 #endif
 
-extern void paging_init(struct machine_desc *desc);
+extern void paging_init(const struct machine_desc *desc);
 extern void sanity_check_meminfo(void);
 extern enum reboot_mode reboot_mode;
-extern void setup_dma_zone(struct machine_desc *desc);
+extern void setup_dma_zone(const struct machine_desc *desc);
 
 unsigned int processor_id;
 EXPORT_SYMBOL(processor_id);
@@ -139,7 +139,7 @@ EXPORT_SYMBOL(elf_platform);
 static const char *cpu_name;
 static const char *machine_name;
 static char __initdata cmd_line[COMMAND_LINE_SIZE];
-struct machine_desc *machine_desc __initdata;
+const struct machine_desc *machine_desc __initdata;
 
 static union { char c[4]; unsigned long l; } endian_test __initdata = { { 'l', '?', '?', 'b' } };
 #define ENDIANNESS ((char)endian_test.l)
@@ -607,7 +607,7 @@ static void __init setup_processor(void)
 
 void __init dump_machine_table(void)
 {
-        struct machine_desc *p;
+        const struct machine_desc *p;
 
         early_print("Available machine support:\n\nID (hex)\tNAME\n");
         for_each_machine_desc(p)
@@ -694,7 +694,7 @@ static int __init early_mem(char *p)
 }
 early_param("mem", early_mem);
 
-static void __init request_standard_resources(struct machine_desc *mdesc)
+static void __init request_standard_resources(const struct machine_desc *mdesc)
 {
         struct memblock_region *region;
         struct resource *res;
@@ -852,7 +852,7 @@ void __init hyp_mode_check(void)
 
 void __init setup_arch(char **cmdline_p)
 {
-        struct machine_desc *mdesc;
+        const struct machine_desc *mdesc;
 
         setup_processor();
         mdesc = setup_machine_fdt(__atags_pointer);
@@ -994,15 +994,6 @@ static int c_show(struct seq_file *m, void *v)
                 seq_printf(m, "model name\t: %s rev %d (%s)\n",
                            cpu_name, cpuid & 15, elf_platform);
 
-#if defined(CONFIG_SMP)
-                seq_printf(m, "BogoMIPS\t: %lu.%02lu\n",
-                           per_cpu(cpu_data, i).loops_per_jiffy / (500000UL/HZ),
-                           (per_cpu(cpu_data, i).loops_per_jiffy / (5000UL/HZ)) % 100);
-#else
-                seq_printf(m, "BogoMIPS\t: %lu.%02lu\n",
-                           loops_per_jiffy / (500000/HZ),
-                           (loops_per_jiffy / (5000/HZ)) % 100);
-#endif
                 /* dump out the processor features */
                 seq_puts(m, "Features\t: ");
 
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 2dc19349eb19..92d10e503746 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -398,17 +398,8 @@ asmlinkage void secondary_start_kernel(void)
 
 void __init smp_cpus_done(unsigned int max_cpus)
 {
-        int cpu;
-        unsigned long bogosum = 0;
-
-        for_each_online_cpu(cpu)
-                bogosum += per_cpu(cpu_data, cpu).loops_per_jiffy;
-
-        printk(KERN_INFO "SMP: Total of %d processors activated "
-               "(%lu.%02lu BogoMIPS).\n",
-               num_online_cpus(),
-               bogosum / (500000/HZ),
-               (bogosum / (5000/HZ)) % 100);
+        printk(KERN_INFO "SMP: Total of %d processors activated.\n",
+               num_online_cpus());
 
         hyp_mode_check();
 }
diff --git a/arch/arm/kernel/smp_tlb.c b/arch/arm/kernel/smp_tlb.c
index c2edfff573c2..83ccca303df8 100644
--- a/arch/arm/kernel/smp_tlb.c
+++ b/arch/arm/kernel/smp_tlb.c
@@ -104,7 +104,7 @@ void flush_tlb_all(void)
         if (tlb_ops_need_broadcast())
                 on_each_cpu(ipi_flush_tlb_all, NULL, 1);
         else
-                local_flush_tlb_all();
+                __flush_tlb_all();
         broadcast_tlb_a15_erratum();
 }
 
@@ -113,7 +113,7 @@ void flush_tlb_mm(struct mm_struct *mm)
         if (tlb_ops_need_broadcast())
                 on_each_cpu_mask(mm_cpumask(mm), ipi_flush_tlb_mm, mm, 1);
         else
-                local_flush_tlb_mm(mm);
+                __flush_tlb_mm(mm);
         broadcast_tlb_mm_a15_erratum(mm);
 }
 
@@ -126,7 +126,7 @@ void flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr)
                 on_each_cpu_mask(mm_cpumask(vma->vm_mm), ipi_flush_tlb_page,
                                         &ta, 1);
         } else
-                local_flush_tlb_page(vma, uaddr);
+                __flush_tlb_page(vma, uaddr);
         broadcast_tlb_mm_a15_erratum(vma->vm_mm);
 }
 
@@ -137,7 +137,7 @@ void flush_tlb_kernel_page(unsigned long kaddr)
                 ta.ta_start = kaddr;
                 on_each_cpu(ipi_flush_tlb_kernel_page, &ta, 1);
         } else
-                local_flush_tlb_kernel_page(kaddr);
+                __flush_tlb_kernel_page(kaddr);
         broadcast_tlb_a15_erratum();
 }
 
@@ -173,5 +173,5 @@ void flush_bp_all(void)
         if (tlb_ops_need_broadcast())
                 on_each_cpu(ipi_flush_bp_all, NULL, 1);
         else
-                local_flush_bp_all();
+                __flush_bp_all();
 }
diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c
index ab517fcce21b..8fcda140358d 100644
--- a/arch/arm/kernel/traps.c
+++ b/arch/arm/kernel/traps.c
@@ -497,28 +497,64 @@ static int bad_syscall(int n, struct pt_regs *regs)
         return regs->ARM_r0;
 }
 
+static long do_cache_op_restart(struct restart_block *);
+
 static inline int
-do_cache_op(unsigned long start, unsigned long end, int flags)
+__do_cache_op(unsigned long start, unsigned long end)
 {
-        struct mm_struct *mm = current->active_mm;
-        struct vm_area_struct *vma;
+        int ret;
+        unsigned long chunk = PAGE_SIZE;
+
+        do {
+                if (signal_pending(current)) {
+                        struct thread_info *ti = current_thread_info();
+
+                        ti->restart_block = (struct restart_block) {
+                                .fn     = do_cache_op_restart,
+                        };
+
+                        ti->arm_restart_block = (struct arm_restart_block) {
+                                {
+                                        .cache = {
+                                                .start  = start,
+                                                .end    = end,
+                                        },
+                                },
+                        };
+
+                        return -ERESTART_RESTARTBLOCK;
+                }
+
+                ret = flush_cache_user_range(start, start + chunk);
+                if (ret)
+                        return ret;
 
+                cond_resched();
+                start += chunk;
+        } while (start < end);
+
+        return 0;
+}
+
+static long do_cache_op_restart(struct restart_block *unused)
+{
+        struct arm_restart_block *restart_block;
+
+        restart_block = &current_thread_info()->arm_restart_block;
+        return __do_cache_op(restart_block->cache.start,
+                             restart_block->cache.end);
+}
+
+static inline int
+do_cache_op(unsigned long start, unsigned long end, int flags)
+{
         if (end < start || flags)
                 return -EINVAL;
 
-        down_read(&mm->mmap_sem);
-        vma = find_vma(mm, start);
-        if (vma && vma->vm_start < end) {
-                if (start < vma->vm_start)
-                        start = vma->vm_start;
-                if (end > vma->vm_end)
-                        end = vma->vm_end;
+        if (!access_ok(VERIFY_READ, start, end - start))
+                return -EFAULT;
 
-                up_read(&mm->mmap_sem);
-                return flush_cache_user_range(start, end);
-        }
-        up_read(&mm->mmap_sem);
-        return -EINVAL;
+        return __do_cache_op(start, end);
 }
 
 /*
diff --git a/arch/arm/kernel/v7m.c b/arch/arm/kernel/v7m.c
new file mode 100644
index 000000000000..4d2cba94f5cc
--- /dev/null
+++ b/arch/arm/kernel/v7m.c
@@ -0,0 +1,19 @@
+/*
+ * Copyright (C) 2013 Uwe Kleine-Koenig for Pengutronix
+ *
+ * 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.
+ */
+#include <linux/io.h>
+#include <linux/reboot.h>
+#include <asm/barrier.h>
+#include <asm/v7m.h>
+
+void armv7m_restart(enum reboot_mode mode, const char *cmd)
+{
+        dsb();
+        __raw_writel(V7M_SCB_AIRCR_VECTKEY | V7M_SCB_AIRCR_SYSRESETREQ,
+                        BASEADDR_V7M_SCB + V7M_SCB_AIRCR);
+        dsb();
+}