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authorGeert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>2009-05-18 02:10:05 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2009-05-21 15:44:26 +1000
commit80947e7c99c29ce3a78bdc1933b310468455a82f (patch)
treed0403ed66d03aa7f6498c65193e1f56def6af13f /arch/powerpc/include/asm/emulated_ops.h
parentf312deb4cd0c88196edf6dab192b7d42514398d6 (diff)
powerpc: Keep track of emulated instructions
If CONFIG_PPC_EMULATED_STATS is enabled, make available counters for the various classes of emulated instructions under /sys/kernel/debug/powerpc/emulated_instructions/ (assumed debugfs is mounted on /sys/kernel/debug). Optionally (controlled by /sys/kernel/debug/powerpc/emulated_instructions/do_warn), rate-limited warnings can be printed to the console when instructions are emulated. Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/include/asm/emulated_ops.h')
-rw-r--r--arch/powerpc/include/asm/emulated_ops.h73
1 files changed, 73 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/emulated_ops.h b/arch/powerpc/include/asm/emulated_ops.h
new file mode 100644
index 000000000000..9154e8526732
--- /dev/null
+++ b/arch/powerpc/include/asm/emulated_ops.h
@@ -0,0 +1,73 @@
+/*
+ * Copyright 2007 Sony Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.
+ * If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _ASM_POWERPC_EMULATED_OPS_H
+#define _ASM_POWERPC_EMULATED_OPS_H
+
+#include <asm/atomic.h>
+
+
+#ifdef CONFIG_PPC_EMULATED_STATS
+
+struct ppc_emulated_entry {
+ const char *name;
+ atomic_t val;
+};
+
+extern struct ppc_emulated {
+#ifdef CONFIG_ALTIVEC
+ struct ppc_emulated_entry altivec;
+#endif
+ struct ppc_emulated_entry dcba;
+ struct ppc_emulated_entry dcbz;
+ struct ppc_emulated_entry fp_pair;
+ struct ppc_emulated_entry isel;
+ struct ppc_emulated_entry mcrxr;
+ struct ppc_emulated_entry mfpvr;
+ struct ppc_emulated_entry multiple;
+ struct ppc_emulated_entry popcntb;
+ struct ppc_emulated_entry spe;
+ struct ppc_emulated_entry string;
+ struct ppc_emulated_entry unaligned;
+#ifdef CONFIG_MATH_EMULATION
+ struct ppc_emulated_entry math;
+#elif defined(CONFIG_8XX_MINIMAL_FPEMU)
+ struct ppc_emulated_entry 8xx;
+#endif
+#ifdef CONFIG_VSX
+ struct ppc_emulated_entry vsx;
+#endif
+} ppc_emulated;
+
+extern u32 ppc_warn_emulated;
+
+extern void ppc_warn_emulated_print(const char *type);
+
+#define PPC_WARN_EMULATED(type) \
+ do { \
+ atomic_inc(&ppc_emulated.type.val); \
+ if (ppc_warn_emulated) \
+ ppc_warn_emulated_print(ppc_emulated.type.name); \
+ } while (0)
+
+#else /* !CONFIG_PPC_EMULATED_STATS */
+
+#define PPC_WARN_EMULATED(type) do { } while (0)
+
+#endif /* !CONFIG_PPC_EMULATED_STATS */
+
+#endif /* _ASM_POWERPC_EMULATED_OPS_H */