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-rw-r--r--arch/mips/include/asm/fpu_emulator.h24
-rw-r--r--arch/mips/math-emu/cp1emu.c102
-rw-r--r--arch/mips/math-emu/dsemul.c4
3 files changed, 80 insertions, 50 deletions
diff --git a/arch/mips/include/asm/fpu_emulator.h b/arch/mips/include/asm/fpu_emulator.h
index e5189572956c..aecada6f6117 100644
--- a/arch/mips/include/asm/fpu_emulator.h
+++ b/arch/mips/include/asm/fpu_emulator.h
@@ -25,17 +25,27 @@
#include <asm/break.h>
#include <asm/inst.h>
+#include <asm/local.h>
+
+#ifdef CONFIG_DEBUG_FS
struct mips_fpu_emulator_stats {
- unsigned int emulated;
- unsigned int loads;
- unsigned int stores;
- unsigned int cp1ops;
- unsigned int cp1xops;
- unsigned int errors;
+ local_t emulated;
+ local_t loads;
+ local_t stores;
+ local_t cp1ops;
+ local_t cp1xops;
+ local_t errors;
};
-extern struct mips_fpu_emulator_stats fpuemustats;
+DECLARE_PER_CPU(struct mips_fpu_emulator_stats, fpuemustats);
+
+#define MIPS_FPU_EMU_INC_STATS(M) \
+ cpu_local_wrap(__local_inc(&__get_cpu_var(fpuemustats).M))
+
+#else
+#define MIPS_FPU_EMU_INC_STATS(M) do { } while (0)
+#endif /* CONFIG_DEBUG_FS */
extern int mips_dsemul(struct pt_regs *regs, mips_instruction ir,
unsigned long cpc);
diff --git a/arch/mips/math-emu/cp1emu.c b/arch/mips/math-emu/cp1emu.c
index 454b53924490..8f2f8e9d8b21 100644
--- 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);
diff --git a/arch/mips/math-emu/dsemul.c b/arch/mips/math-emu/dsemul.c
index df7b9d928efc..36d975ae08f8 100644
--- a/arch/mips/math-emu/dsemul.c
+++ b/arch/mips/math-emu/dsemul.c
@@ -98,7 +98,7 @@ int mips_dsemul(struct pt_regs *regs, mips_instruction ir, unsigned long cpc)
err |= __put_user(cpc, &fr->epc);
if (unlikely(err)) {
- fpuemustats.errors++;
+ MIPS_FPU_EMU_INC_STATS(errors);
return SIGBUS;
}
@@ -136,7 +136,7 @@ int do_dsemulret(struct pt_regs *xcp)
err |= __get_user(cookie, &fr->cookie);
if (unlikely(err || (insn != BREAK_MATH) || (cookie != BD_COOKIE))) {
- fpuemustats.errors++;
+ MIPS_FPU_EMU_INC_STATS(errors);
return 0;
}
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