From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 40wCrv2NBfzDr4h for ; Tue, 29 May 2018 22:36:30 +1000 (AEST) Received: from pps.filterd (m0098413.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w4TCZ2Hj126352 for ; Tue, 29 May 2018 08:36:28 -0400 Received: from e06smtp13.uk.ibm.com (e06smtp13.uk.ibm.com [195.75.94.109]) by mx0b-001b2d01.pphosted.com with ESMTP id 2j95wquc78-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 29 May 2018 08:36:27 -0400 Received: from localhost by e06smtp13.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 29 May 2018 13:36:26 +0100 From: "Naveen N. Rao" To: Ingo Molnar , Michael Ellerman , Masami Hiramatsu , Josef Bacik Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Subject: [PATCH 2/2] powerpc: Add support for function error injection Date: Tue, 29 May 2018 18:06:03 +0530 In-Reply-To: References: In-Reply-To: References: Message-Id: <5ad23690185a90a887514d702ecb45783090d7c0.1527596631.git.naveen.n.rao@linux.vnet.ibm.com> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Signed-off-by: Naveen N. Rao --- arch/powerpc/Kconfig | 1 + arch/powerpc/include/asm/error-injection.h | 9 +++++++++ arch/powerpc/include/asm/ptrace.h | 5 +++++ 3 files changed, 15 insertions(+) create mode 100644 arch/powerpc/include/asm/error-injection.h diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 23247fa551e7..ed1ab693f945 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -194,6 +194,7 @@ config PPC select HAVE_EBPF_JIT if PPC64 select HAVE_EFFICIENT_UNALIGNED_ACCESS if !(CPU_LITTLE_ENDIAN && POWER7_CPU) select HAVE_FTRACE_MCOUNT_RECORD + select HAVE_FUNCTION_ERROR_INJECTION select HAVE_FUNCTION_GRAPH_TRACER select HAVE_FUNCTION_TRACER select HAVE_GCC_PLUGINS diff --git a/arch/powerpc/include/asm/error-injection.h b/arch/powerpc/include/asm/error-injection.h new file mode 100644 index 000000000000..b596eca04ef9 --- /dev/null +++ b/arch/powerpc/include/asm/error-injection.h @@ -0,0 +1,9 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_ERROR_INJECTION_H +#define _ASM_ERROR_INJECTION_H + +#include + +#define ARCH_FUNC_RET "blr" + +#endif /* _ASM_ERROR_INJECTION_H */ diff --git a/arch/powerpc/include/asm/ptrace.h b/arch/powerpc/include/asm/ptrace.h index e4923686e43a..c0705296c2f0 100644 --- a/arch/powerpc/include/asm/ptrace.h +++ b/arch/powerpc/include/asm/ptrace.h @@ -101,6 +101,11 @@ static inline long regs_return_value(struct pt_regs *regs) return -regs->gpr[3]; } +static inline void regs_set_return_value(struct pt_regs *regs, unsigned long rc) +{ + regs->gpr[3] = rc; +} + #ifdef __powerpc64__ #define user_mode(regs) ((((regs)->msr) >> MSR_PR_LG) & 0x1) #else -- 2.17.0