Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965462AbbKDUqe (ORCPT ); Wed, 4 Nov 2015 15:46:34 -0500 Received: from e28smtp09.in.ibm.com ([122.248.162.9]:51385 "EHLO e28smtp09.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932609AbbKDUqc (ORCPT ); Wed, 4 Nov 2015 15:46:32 -0500 X-Helo: d28dlp03.in.ibm.com X-MailFrom: maddy@linux.vnet.ibm.com X-RcptTo: linux-kernel@vger.kernel.org From: Madhavan Srinivasan To: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, x86@kernel.org Cc: Madhavan Srinivasan , Thomas Gleixner , Ingo Molnar , Peter Zijlstra , Jiri Olsa , Arnaldo Carvalho de Melo , Stephane Eranian , Russell King , Catalin Marinas , Will Deacon , Benjamin Herrenschmidt , Michael Ellerman , Sukadev Bhattiprolu Subject: [RFC PATCH 0/3]perf/core: extend perf_reg and perf_sample_regs_intr Date: Thu, 5 Nov 2015 02:16:15 +0530 Message-Id: <1446669978-6366-1-git-send-email-maddy@linux.vnet.ibm.com> X-Mailer: git-send-email 1.9.1 X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 15110420-0033-0000-0000-000008B5CE78 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3313 Lines: 75 This patchset extend the perf sample regs infrastructure to include architecture specific regs. Current perf_sample_regs_intr exports only registers in the pt_regs to perf.data using PERF_SAMPLE_REGS_INTR sample type. But sometimes we end up looking for or prefer raw register values at the interrupt during debug. This patchset extends the perf_regs to include arch specific struct, and makes perf_sample_regs_intr in kernel/event/core.c as __weak__ function. This way, an arch specific implementation of perf_sample_regs_intr() can update the arch specific data to the perf_regs. First patch defines a new structure arch_misc_reg and updates the same in the struct perf_regs. Patch also modifies the perf_reg_value() and perf_output_sample_regs() to take perf_regs parameter instead of pt_regs. Second patch updates struct arch_misc_reg for arch/powerpc with pmu registers and adds offsetof macro for the same. It extends perf_reg_value() to use reg idx to decide on struct to return value from. Third patch adds arch specific perf_sample_regs_intr() in arch/powerpc to hook up the arch_misc_regs to perf_regs. This patchset depends on the recent posting by Anju T in linuxppc-dev@lists.ozlabs.org to enable PERF_SAMPLE_REGS_INTR support in arch/powerpc. https://patchwork.ozlabs.org/patch/539242/ https://patchwork.ozlabs.org/patch/539243/ https://patchwork.ozlabs.org/patch/539244/ Would appreciate comments and feedback. Signed-off-by: Madhavan Srinivasan Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Peter Zijlstra Cc: Jiri Olsa Cc: Arnaldo Carvalho de Melo Cc: Stephane Eranian Cc: Russell King Cc: Catalin Marinas Cc: Will Deacon Cc: Benjamin Herrenschmidt Cc: Michael Ellerman Cc: Sukadev Bhattiprolu Madhavan Srinivasan (3): perf/core: extend perf_regs to include arch specific regs perf/powerpc: update macros and add regs to arch_misc_reg struct perf/powerpc: Functions to update arch_misc_regs arch/arm/include/asm/ptrace.h | 2 ++ arch/arm/kernel/perf_regs.c | 4 +++- arch/arm64/include/asm/ptrace.h | 2 ++ arch/arm64/kernel/perf_regs.c | 4 +++- arch/powerpc/include/uapi/asm/perf_regs.h | 10 ++++++++++ arch/powerpc/include/uapi/asm/ptrace.h | 11 +++++++++++ arch/powerpc/perf/core-book3s.c | 29 +++++++++++++++++++++++++++++ arch/powerpc/perf/perf_regs.c | 28 ++++++++++++++++++++++++++-- arch/x86/include/asm/ptrace.h | 2 ++ arch/x86/kernel/perf_regs.c | 4 +++- include/linux/perf_regs.h | 5 +++-- kernel/events/core.c | 8 ++++---- tools/perf/arch/powerpc/include/perf_regs.h | 16 ++++++++++++++++ 13 files changed, 114 insertions(+), 11 deletions(-) -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/