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Rao" To: Michael Ellerman , Steven Rostedt Subject: [PATCH v4 04/10] powerpc64/ftrace: Add helpers to hard disable ftrace Date: Wed, 4 Apr 2018 01:42:19 +0530 X-Mailer: git-send-email 2.16.2 In-Reply-To: References: In-Reply-To: References: X-TM-AS-GCONF: 00 x-cbid: 18040320-0040-0000-0000-0000042A0B69 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18040320-0041-0000-0000-0000262D3AA4 Message-Id: X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2018-04-03_08:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1709140000 definitions=main-1804030202 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: sathnaga@linux.vnet.ibm.com, linuxppc-dev@lists.ozlabs.org, Anton Blanchard , Nicholas Piggin Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Add some helpers to enable/disable ftrace through paca->ftrace_enabled. Signed-off-by: Naveen N. Rao --- arch/powerpc/include/asm/ftrace.h | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/arch/powerpc/include/asm/ftrace.h b/arch/powerpc/include/asm/ftrace.h index ebfc0b846bb5..3b5e85a72e10 100644 --- a/arch/powerpc/include/asm/ftrace.h +++ b/arch/powerpc/include/asm/ftrace.h @@ -82,6 +82,23 @@ static inline bool arch_syscall_match_sym_name(const char *sym, const char *name return !strcmp(sym + 4, name + 3); } #endif /* CONFIG_FTRACE_SYSCALLS && PPC64_ELF_ABI_v1 */ + +#ifdef CONFIG_PPC64 +#include + +static inline void this_cpu_disable_ftrace(void) +{ + get_paca()->ftrace_enabled = 0; +} + +static inline void this_cpu_enable_ftrace(void) +{ + get_paca()->ftrace_enabled = 1; +} +#else /* CONFIG_PPC64 */ +static inline void this_cpu_disable_ftrace(void) { } +static inline void this_cpu_enable_ftrace(void) { } +#endif /* CONFIG_PPC64 */ #endif /* !__ASSEMBLY__ */ #endif /* _ASM_POWERPC_FTRACE */