Merge branch 'for-linus' of git://git.infradead.org/users/eparis/notify

[pandora-kernel.git] / arch / mips / kernel / traps.c

diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index d053bf4..8e9fbe7 100644 (file)
--- 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 ... */
 }
@@ -1469,6 +1481,7 @@ void __cpuinit per_cpu_trap_init(void)
 {
        unsigned int cpu = smp_processor_id();
        unsigned int status_set = ST0_CU0;
+       unsigned int hwrena = cpu_hwrena_impl_bits;
 #ifdef CONFIG_MIPS_MT_SMTC
        int secondaryTC = 0;
        int bootTC = (cpu == 0);
@@ -1501,14 +1514,14 @@ void __cpuinit per_cpu_trap_init(void)
        change_c0_status(ST0_CU|ST0_MX|ST0_RE|ST0_FR|ST0_BEV|ST0_TS|ST0_KX|ST0_SX|ST0_UX,
                         status_set);
 
-       if (cpu_has_mips_r2) {
-               unsigned int enable = 0x0000000f | cpu_hwrena_impl_bits;
+       if (cpu_has_mips_r2)
+               hwrena |= 0x0000000f;
 
-               if (!noulri && cpu_has_userlocal)
-                       enable |= (1 << 29);
+       if (!noulri && cpu_has_userlocal)
+               hwrena |= (1 << 29);
 
-               write_c0_hwrena(enable);
-       }
+       if (hwrena)
+               write_c0_hwrena(hwrena);
 
 #ifdef CONFIG_MIPS_MT_SMTC
        if (!secondaryTC) {