From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from gate.crashing.org (gate.crashing.org [63.228.1.57]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 690BA2C009E for ; Mon, 13 May 2013 15:52:08 +1000 (EST) Message-ID: <1368424306.19924.20.camel@pasglop> Subject: Re: [RFC PATCH v3 0/5] powerpc: Support context tracking for Power pSeries From: Benjamin Herrenschmidt To: Li Zhong Date: Mon, 13 May 2013 15:51:46 +1000 In-Reply-To: <1368422493-9831-1-git-send-email-zhong@linux.vnet.ibm.com> References: <1368422493-9831-1-git-send-email-zhong@linux.vnet.ibm.com> Content-Type: text/plain; charset="UTF-8" Mime-Version: 1.0 Cc: fweisbec@gmail.com, Anton Blanchard , linux-kernel@vger.kernel.org, paulus@samba.org, paulmck@linux.vnet.ibm.com, linuxppc-dev@lists.ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Mon, 2013-05-13 at 13:21 +0800, Li Zhong wrote: > These patches try to support context tracking for Power arch, beginning with > 64-bit pSeries. The codes are ported from that of the x86_64, and in each > patch, I listed the corresponding patch for x86. So that's yet another pile of bloat on all syscall entry/exit and exception entry/exit. What is it used for ? (I haven't followed on x86_64 side). Cheers, Ben. > v3: > > This version is mainly a rebasing, against 3.10-rc1, also as the common code > to handle the exception are pulled into 3.10, so there is no dependency on > tip tree. So patch #2 and #6 in previous version_2 is merged together. > > Li Zhong (5): > powerpc: Syscall hooks for context tracking subsystem > powerpc: Exception hooks for context tracking subsystem > powerpc: Exit user context on notify resume > powerpc: Use the new schedule_user API on userspace preemption > powerpc: select HAVE_CONTEXT_TRACKING for pSeries > > arch/powerpc/include/asm/context_tracking.h | 10 +++ > arch/powerpc/include/asm/thread_info.h | 7 ++- > arch/powerpc/kernel/entry_64.S | 3 +- > arch/powerpc/kernel/ptrace.c | 5 ++ > arch/powerpc/kernel/signal.c | 5 ++ > arch/powerpc/kernel/traps.c | 91 ++++++++++++++++++++------- > arch/powerpc/mm/fault.c | 16 ++++- > arch/powerpc/mm/hash_utils_64.c | 38 ++++++++--- > arch/powerpc/platforms/pseries/Kconfig | 1 + > 9 files changed, 140 insertions(+), 36 deletions(-) > create mode 100644 arch/powerpc/include/asm/context_tracking.h >