MIPS: Collect FPU emulator statistics per-CPU.

[linux-2.6-block.git] / arch / mips / math-emu / cp1emu.c

diff --git a/arch/mips/math-emu/cp1emu.c b/arch/mips/math-emu/cp1emu.c
index 454b53924490c58ed383f047f84f68e8be117afe..8f2f8e9d8b212ae5897c0aabee5dd35c46837680 100644 (file)
--- a/arch/mips/math-emu/cp1emu.c
+++ b/arch/mips/math-emu/cp1emu.c
@@ -35,6 +35,7 @@
  * better performance by compiling with -msoft-float!
  */
 #include <linux/sched.h>
+#include <linux/module.h>
 #include <linux/debugfs.h>
 
 #include <asm/inst.h>
@@ -68,7 +69,9 @@ static int fpux_emu(struct pt_regs *,
 
 /* Further private data for which no space exists in mips_fpu_struct */
 
-struct mips_fpu_emulator_stats fpuemustats;
+#ifdef CONFIG_DEBUG_FS
+DEFINE_PER_CPU(struct mips_fpu_emulator_stats, fpuemustats);
+#endif
 
 /* Control registers */
 
@@ -209,7 +212,7 @@ static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_struct *ctx)
        unsigned int cond;
 
        if (get_user(ir, (mips_instruction __user *) xcp->cp0_epc)) {
-               fpuemustats.errors++;
+               MIPS_FPU_EMU_INC_STATS(errors);
                return SIGBUS;
        }
 
@@ -240,7 +243,7 @@ static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_struct *ctx)
                        return SIGILL;
                }
                if (get_user(ir, (mips_instruction __user *) emulpc)) {
-                       fpuemustats.errors++;
+                       MIPS_FPU_EMU_INC_STATS(errors);
                        return SIGBUS;
                }
                /* __compute_return_epc() will have updated cp0_epc */
@@ -253,16 +256,16 @@ static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_struct *ctx)
        }
 
       emul:
-       fpuemustats.emulated++;
+       MIPS_FPU_EMU_INC_STATS(emulated);
        switch (MIPSInst_OPCODE(ir)) {
        case ldc1_op:{
                u64 __user *va = (u64 __user *) (xcp->regs[MIPSInst_RS(ir)] +
                        MIPSInst_SIMM(ir));
                u64 val;
 
-               fpuemustats.loads++;
+               MIPS_FPU_EMU_INC_STATS(loads);
                if (get_user(val, va)) {
-                       fpuemustats.errors++;
+                       MIPS_FPU_EMU_INC_STATS(errors);
                        return SIGBUS;
                }
                DITOREG(val, MIPSInst_RT(ir));
@@ -274,10 +277,10 @@ static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_struct *ctx)
                        MIPSInst_SIMM(ir));
                u64 val;
 
-               fpuemustats.stores++;
+               MIPS_FPU_EMU_INC_STATS(stores);
                DIFROMREG(val, MIPSInst_RT(ir));
                if (put_user(val, va)) {
-                       fpuemustats.errors++;
+                       MIPS_FPU_EMU_INC_STATS(errors);
                        return SIGBUS;
                }
                break;
@@ -288,9 +291,9 @@ static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_struct *ctx)
                        MIPSInst_SIMM(ir));
                u32 val;
 
-               fpuemustats.loads++;
+               MIPS_FPU_EMU_INC_STATS(loads);
                if (get_user(val, va)) {
-                       fpuemustats.errors++;
+                       MIPS_FPU_EMU_INC_STATS(errors);
                        return SIGBUS;
                }
                SITOREG(val, MIPSInst_RT(ir));
@@ -302,10 +305,10 @@ static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_struct *ctx)
                        MIPSInst_SIMM(ir));
                u32 val;
 
-               fpuemustats.stores++;
+               MIPS_FPU_EMU_INC_STATS(stores);
                SIFROMREG(val, MIPSInst_RT(ir));
                if (put_user(val, va)) {
-                       fpuemustats.errors++;
+                       MIPS_FPU_EMU_INC_STATS(errors);
                        return SIGBUS;
                }
                break;
@@ -429,7 +432,7 @@ static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_struct *ctx)
 
                                if (get_user(ir,
                                    (mips_instruction __user *) xcp->cp0_epc)) {
-                                       fpuemustats.errors++;
+                                       MIPS_FPU_EMU_INC_STATS(errors);
                                        return SIGBUS;
                                }
 
@@ -595,7 +598,7 @@ static int fpux_emu(struct pt_regs *xcp, struct mips_fpu_struct *ctx,
 {
        unsigned rcsr = 0;      /* resulting csr */
 
-       fpuemustats.cp1xops++;
+       MIPS_FPU_EMU_INC_STATS(cp1xops);
 
        switch (MIPSInst_FMA_FFMT(ir)) {
        case s_fmt:{            /* 0 */
@@ -610,9 +613,9 @@ static int fpux_emu(struct pt_regs *xcp, struct mips_fpu_struct *ctx,
                        va = (void __user *) (xcp->regs[MIPSInst_FR(ir)] +
                                xcp->regs[MIPSInst_FT(ir)]);
 
-                       fpuemustats.loads++;
+                       MIPS_FPU_EMU_INC_STATS(loads);
                        if (get_user(val, va)) {
-                               fpuemustats.errors++;
+                               MIPS_FPU_EMU_INC_STATS(errors);
                                return SIGBUS;
                        }
                        SITOREG(val, MIPSInst_FD(ir));
@@ -622,11 +625,11 @@ static int fpux_emu(struct pt_regs *xcp, struct mips_fpu_struct *ctx,
                        va = (void __user *) (xcp->regs[MIPSInst_FR(ir)] +
                                xcp->regs[MIPSInst_FT(ir)]);
 
-                       fpuemustats.stores++;
+                       MIPS_FPU_EMU_INC_STATS(stores);
 
                        SIFROMREG(val, MIPSInst_FS(ir));
                        if (put_user(val, va)) {
-                               fpuemustats.errors++;
+                               MIPS_FPU_EMU_INC_STATS(errors);
                                return SIGBUS;
                        }
                        break;
@@ -687,9 +690,9 @@ static int fpux_emu(struct pt_regs *xcp, struct mips_fpu_struct *ctx,
                        va = (void __user *) (xcp->regs[MIPSInst_FR(ir)] +
                                xcp->regs[MIPSInst_FT(ir)]);
 
-                       fpuemustats.loads++;
+                       MIPS_FPU_EMU_INC_STATS(loads);
                        if (get_user(val, va)) {
-                               fpuemustats.errors++;
+                               MIPS_FPU_EMU_INC_STATS(errors);
                                return SIGBUS;
                        }
                        DITOREG(val, MIPSInst_FD(ir));
@@ -699,10 +702,10 @@ static int fpux_emu(struct pt_regs *xcp, struct mips_fpu_struct *ctx,
                        va = (void __user *) (xcp->regs[MIPSInst_FR(ir)] +
                                xcp->regs[MIPSInst_FT(ir)]);
 
-                       fpuemustats.stores++;
+                       MIPS_FPU_EMU_INC_STATS(stores);
                        DIFROMREG(val, MIPSInst_FS(ir));
                        if (put_user(val, va)) {
-                               fpuemustats.errors++;
+                               MIPS_FPU_EMU_INC_STATS(errors);
                                return SIGBUS;
                        }
                        break;
@@ -769,7 +772,7 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_struct *ctx,
 #endif
        } rv;                   /* resulting value */
 
-       fpuemustats.cp1ops++;
+       MIPS_FPU_EMU_INC_STATS(cp1ops);
        switch (rfmt = (MIPSInst_FFMT(ir) & 0xf)) {
        case s_fmt:{            /* 0 */
                union {
@@ -1240,7 +1243,7 @@ int fpu_emulator_cop1Handler(struct pt_regs *xcp, struct mips_fpu_struct *ctx,
                prevepc = xcp->cp0_epc;
 
                if (get_user(insn, (mips_instruction __user *) xcp->cp0_epc)) {
-                       fpuemustats.errors++;
+                       MIPS_FPU_EMU_INC_STATS(errors);
                        return SIGBUS;
                }
                if (insn == 0)
@@ -1276,33 +1279,50 @@ int fpu_emulator_cop1Handler(struct pt_regs *xcp, struct mips_fpu_struct *ctx,
 }
 
 #ifdef CONFIG_DEBUG_FS
+
+static int fpuemu_stat_get(void *data, u64 *val)
+{
+       int cpu;
+       unsigned long sum = 0;
+       for_each_online_cpu(cpu) {
+               struct mips_fpu_emulator_stats *ps;
+               local_t *pv;
+               ps = &per_cpu(fpuemustats, cpu);
+               pv = (void *)ps + (unsigned long)data;
+               sum += local_read(pv);
+       }
+       *val = sum;
+       return 0;
+}
+DEFINE_SIMPLE_ATTRIBUTE(fops_fpuemu_stat, fpuemu_stat_get, NULL, "%llu\n");
+
 extern struct dentry *mips_debugfs_dir;
 static int __init debugfs_fpuemu(void)
 {
        struct dentry *d, *dir;
-       int i;
-       static struct {
-               const char *name;
-               unsigned int *v;
-       } vars[] __initdata = {
-               { "emulated", &fpuemustats.emulated },
-               { "loads",    &fpuemustats.loads },
-               { "stores",   &fpuemustats.stores },
-               { "cp1ops",   &fpuemustats.cp1ops },
-               { "cp1xops",  &fpuemustats.cp1xops },
-               { "errors",   &fpuemustats.errors },
-       };
 
        if (!mips_debugfs_dir)
                return -ENODEV;
        dir = debugfs_create_dir("fpuemustats", mips_debugfs_dir);
        if (!dir)
                return -ENOMEM;
-       for (i = 0; i < ARRAY_SIZE(vars); i++) {
-               d = debugfs_create_u32(vars[i].name, S_IRUGO, dir, vars[i].v);
-               if (!d)
-                       return -ENOMEM;
-       }
+
+#define FPU_STAT_CREATE(M)                                             \
+       do {                                                            \
+               d = debugfs_create_file(#M , S_IRUGO, dir,              \
+                       (void *)offsetof(struct mips_fpu_emulator_stats, M), \
+                       &fops_fpuemu_stat);                             \
+               if (!d)                                                 \
+                       return -ENOMEM;                                 \
+       } while (0)
+
+       FPU_STAT_CREATE(emulated);
+       FPU_STAT_CREATE(loads);
+       FPU_STAT_CREATE(stores);
+       FPU_STAT_CREATE(cp1ops);
+       FPU_STAT_CREATE(cp1xops);
+       FPU_STAT_CREATE(errors);
+
        return 0;
 }
 __initcall(debugfs_fpuemu);