5 files changed, 36 insertions, 5 deletions

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 8fbbef95021..dc81f39c568 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -4,6 +4,8 @@ config MIPS
         select HAVE_GENERIC_DMA_COHERENT
         select HAVE_IDE
         select HAVE_OPROFILE
+        select HAVE_PERF_EVENTS
+        select PERF_USE_VMALLOC
         select HAVE_ARCH_KGDB
         select HAVE_FUNCTION_TRACER
         select HAVE_FUNCTION_TRACE_MCOUNT_TEST
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index d053bf4759e..8d79b8774b3 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -29,6 +29,7 @@
 #include <linux/notifier.h>
 #include <linux/kdb.h>
 #include <linux/irq.h>
+#include <linux/perf_event.h>
 
 #include <asm/bootinfo.h>
 #include <asm/branch.h>
@@ -576,10 +577,16 @@ static inline int simulate_sc(struct pt_regs *regs, unsigned int opcode)
  */
 static int simulate_llsc(struct pt_regs *regs, unsigned int opcode)
 {
-        if ((opcode & OPCODE) == LL)
+        if ((opcode & OPCODE) == LL) {
+                perf_sw_event(PERF_COUNT_SW_EMULATION_FAULTS,
+                                1, 0, regs, 0);
                 return simulate_ll(regs, opcode);
-        if ((opcode & OPCODE) == SC)
+        }
+        if ((opcode & OPCODE) == SC) {
+                perf_sw_event(PERF_COUNT_SW_EMULATION_FAULTS,
+                                1, 0, regs, 0);
                 return simulate_sc(regs, opcode);
+        }
 
         return -1;                      /* Must be something else ... */
 }
@@ -595,6 +602,8 @@ static int simulate_rdhwr(struct pt_regs *regs, unsigned int opcode)
         if ((opcode & OPCODE) == SPEC3 && (opcode & FUNC) == RDHWR) {
                 int rd = (opcode & RD) >> 11;
                 int rt = (opcode & RT) >> 16;
+                perf_sw_event(PERF_COUNT_SW_EMULATION_FAULTS,
+                                1, 0, regs, 0);
                 switch (rd) {
                 case 0:         /* CPU number */
                         regs->regs[rt] = smp_processor_id();
@@ -630,8 +639,11 @@ static int simulate_rdhwr(struct pt_regs *regs, unsigned int opcode)
 
 static int simulate_sync(struct pt_regs *regs, unsigned int opcode)
 {
-        if ((opcode & OPCODE) == SPEC0 && (opcode & FUNC) == SYNC)
+        if ((opcode & OPCODE) == SPEC0 && (opcode & FUNC) == SYNC) {
+                perf_sw_event(PERF_COUNT_SW_EMULATION_FAULTS,
+                                1, 0, regs, 0);
                 return 0;
+        }
 
         return -1;                      /* Must be something else ... */
 }
diff --git a/arch/mips/kernel/unaligned.c b/arch/mips/kernel/unaligned.c
index 33d5a5ce4a2..cfea1adfa15 100644
--- a/arch/mips/kernel/unaligned.c
+++ b/arch/mips/kernel/unaligned.c
@@ -78,6 +78,8 @@
 #include <linux/smp.h>
 #include <linux/sched.h>
 #include <linux/debugfs.h>
+#include <linux/perf_event.h>
+
 #include <asm/asm.h>
 #include <asm/branch.h>
 #include <asm/byteorder.h>
@@ -109,6 +111,9 @@ static void emulate_load_store_insn(struct pt_regs *regs,
         unsigned long value;
         unsigned int res;
 
+        perf_sw_event(PERF_COUNT_SW_EMULATION_FAULTS,
+                      1, 0, regs, 0);
+
         /*
          * This load never faults.
          */
@@ -511,6 +516,8 @@ asmlinkage void do_ade(struct pt_regs *regs)
         unsigned int __user *pc;
         mm_segment_t seg;
 
+        perf_sw_event(PERF_COUNT_SW_ALIGNMENT_FAULTS,
+                        1, 0, regs, regs->cp0_badvaddr);
         /*
          * Did we catch a fault trying to load an instruction?
          * Or are we running in MIPS16 mode?
diff --git a/arch/mips/math-emu/cp1emu.c b/arch/mips/math-emu/cp1emu.c
index ec3faa413f3..b2ad1b0910f 100644
--- a/arch/mips/math-emu/cp1emu.c
+++ b/arch/mips/math-emu/cp1emu.c
@@ -36,6 +36,7 @@
 #include <linux/sched.h>
 #include <linux/module.h>
 #include <linux/debugfs.h>
+#include <linux/perf_event.h>
 
 #include <asm/inst.h>
 #include <asm/bootinfo.h>
@@ -258,6 +259,8 @@ static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_struct *ctx)
         }
 
       emul:
+        perf_sw_event(PERF_COUNT_SW_EMULATION_FAULTS,
+                        1, 0, xcp, 0);
         MIPS_FPU_EMU_INC_STATS(emulated);
         switch (MIPSInst_OPCODE(ir)) {
         case ldc1_op:{
diff --git a/arch/mips/mm/fault.c b/arch/mips/mm/fault.c
index 783ad0065fd..137ee76a004 100644
--- a/arch/mips/mm/fault.c
+++ b/arch/mips/mm/fault.c
@@ -18,6 +18,7 @@
 #include <linux/smp.h>
 #include <linux/module.h>
 #include <linux/kprobes.h>
+#include <linux/perf_event.h>
 
 #include <asm/branch.h>
 #include <asm/mmu_context.h>
@@ -144,6 +145,7 @@ good_area:
          * the fault.
          */
         fault = handle_mm_fault(mm, vma, address, write ? FAULT_FLAG_WRITE : 0);
+        perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, 0, regs, address);
         if (unlikely(fault & VM_FAULT_ERROR)) {
                 if (fault & VM_FAULT_OOM)
                         goto out_of_memory;
@@ -151,10 +153,15 @@ good_area:
                         goto do_sigbus;
                 BUG();
         }
-        if (fault & VM_FAULT_MAJOR)
+        if (fault & VM_FAULT_MAJOR) {
+                perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MAJ,
+                                1, 0, regs, address);
                 tsk->maj_flt++;
-        else
+        } else {
+                perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MIN,
+                                1, 0, regs, address);
                 tsk->min_flt++;
+        }
 
         up_read(&mm->mmap_sem);
         return;