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powerpc: Keep track of emulated instructions

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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>
This commit is contained in:
Geert Uytterhoeven
2009-05-18 02:10:05 +00:00
committed by Benjamin Herrenschmidt
parent f312deb4cd
commit 80947e7c99
4 changed files with 196 additions and 6 deletions
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73
arch/powerpc/include/asm/emulated_ops.h Normal file
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/*
* 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 */