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| * | MIPS: r4k,octeon,r2300: stack protector: change canary per taskGregory Fong2013-07-014-0/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For non-SMP, uses the new random canary value that is stored in the task struct whenever a new task is forked. Based on ARM version in df0698be14c6683606d5df2d83e3ae40f85ed0d9 and subject to the same limitations: the variable GCC expects, __stack_chk_guard, is global, so this will not work on SMP. Quoting Nicolas Pitre <nico@fluxnic.net>: "One way to overcome this GCC limitation would be to locate the __stack_chk_guard variable into a memory page of its own for each CPU, and then use TLB locking to have each CPU see its own page at the same virtual address for each of them." Signed-off-by: Gregory Fong <gregory.0xf0@gmail.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/5488/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | MIPS: initial stack protector supportGregory Fong2013-07-011-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Implements basic stack protector support based on ARM version in c743f38013aeff58ef6252601e397b5ba281c633 , with Kconfig option, constant canary value set at boot time, and script to check if compiler actually supports stack protector. Tested by creating a kernel module that writes past end of char[]. Signed-off-by: Gregory Fong <gregory.0xf0@gmail.com> Cc: linux-mips@linux-mips.org Cc: Filippo Arcidiacono <filippo.arcidiacono@st.com> Cc: Carmelo Amoroso <carmelo.amoroso@st.com> Patchwork: https://patchwork.linux-mips.org/patch/5448/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | MIPS: Allow platform specific scratch registersJayachandran C2013-06-131-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | XLR/XLP COP0 scratch is register 22, sel 0-7. Add a function c0_kscratch() which returns the scratch register for the platform, and use the return value while generating TLB handlers. Setup kscratch_mask to 0xf for XLR/XLP since the config4 register does not exist. This allows the kernel to allocate scratch registers 0-3 if needed. Signed-off-by: Jayachandran C <jchandra@broadcom.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/5445/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | MIPS: Allow kernel to use coprocessor 2Jayachandran C2013-06-131-10/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Kernel threads should be able to use COP2 if the platform needs it. Do not call die_if_kernel() for a coprocessor unusable exception if the exception due to COP2 usage. Instead, the default notifier for COP2 exceptions is updated to call die_if_kernel. Signed-off-by: Jayachandran C <jchandra@broadcom.com> Cc: linux-mips@linux-mips.org Cc: ddaney.cavm@gmail.com Patchwork: https://patchwork.linux-mips.org/patch/5415/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | MIPS: Move cop2 save/restore to switch_to()Jayachandran C2013-06-131-27/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Move the common code for saving and restoring platform specific COP2 registers to switch_to(). This will make supporting new platforms (like Netlogic XLP) easier. The platform specific COP2 definitions are to be specified in asm/processor.h and in asm/cop2.h. Signed-off-by: Jayachandran C <jchandra@broadcom.com> Cc: linux-mips@linux-mips.org Cc: ddaney.cavm@gmail.com Patchwork: https://patchwork.linux-mips.org/patch/5411/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | MIPS: kernel: mcount.S: Drop FRAME_POINTER codepathMarkos Chandras2013-06-111-4/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | CONFIG_FRAME_POINTER is not selectable for MIPS so this codepath was never executed. Signed-off-by: Markos Chandras <markos.chandras@imgtec.com> Acked-by: Steven J. Hill <Steven.Hill@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/5440/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | MIPS: Implement HAVE_CONTEXT_TRACKING.Ralf Baechle2013-06-105-14/+86
| | | | | | | | | | | | | | | | | | This enables support for CONFIG_NO_HZ_FULL. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | MIPS: Cleanup flags in syscall flags handlers.Ralf Baechle2013-06-104-4/+4
| | | | | | | | | | | | | | | | | | This will simplify further modifications. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | MIPS: using strlcpy() instead of strncpy()Chen Gang2013-06-101-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Ensure strings are always '\0' terminated. Or in the next pr_info() shit may hit the fan. Signed-off-by: Chen Gang <gang.chen@asianux.com> Acked-by: John Crispin <blogic@openwrt.org> Cc: david.daney@cavium.com Cc: linux-mips@linux-mips.org Cc: Linux-Arch <linux-arch@vger.kernel.org> Cc: linux-kernel@vger.kernel.org <linux-kernel@vger.kernel.org> Patchwork: https://patchwork.linux-mips.org/patch/5331/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | | mips: remove savemaxmem parameter setupZhang Yanfei2013-07-031-10/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | saved_max_pfn is used to know the amount of memory that the previous kernel used. And for powerpc, we set saved_max_pfn by passing the kernel commandline parameter "savemaxmem=". The only user of saved_max_pfn in mips is read_oldmem interface. Since we have removed read_oldmem, so we don't need this parameter anymore. Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Dave Hansen <dave@sr71.net> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Matt Fleming <matt.fleming@intel.com> Cc: Michael Holzheu <holzheu@linux.vnet.ibm.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Tony Luck <tony.luck@intel.com> Cc: Vivek Goyal <vgoyal@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | Merge tag 'v3.10' into sched/coreIngo Molnar2013-07-016-19/+49
|\ \ \ | | |/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Merge in a recent upstream commit: c2853c8df57f include/linux/math64.h: add div64_ul() because: 72a4cf20cb71 sched: Change cfs_rq load avg to unsigned long relies on it. [ We don't rebase sched/core for this, because the handful of followup commits after the broken commit are not behavioral changes so are unlikely to be needed during bisection. ] Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | MIPS: ftrace: Add missing CONFIG_DYNAMIC_FTRACEMarkos Chandras2013-06-101-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | arch_ftrace_update_code and ftrace_modify_all_code are only available if CONFIG_DYNAMIC_FTRACE is selected. Fixes the following build problem on MIPS randconfig: arch/mips/kernel/ftrace.c: In function 'arch_ftrace_update_code': arch/mips/kernel/ftrace.c:31:2: error: implicit declaration of function 'ftrace_modify_all_code' [-Werror=implicit-function-declaration] Signed-off-by: Markos Chandras <markos.chandras@imgtec.com> Acked-by: Steven J. Hill <Steven.Hill@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/5435/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | MIPS: Alchemy: fix wait functionManuel Lauss2013-06-101-6/+7
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Only an interrupt can wake the core from 'wait', enable interrupts locally before executing 'wait'. [ralf@linux-mips.org: This leave the race between an interrupt that's setting TIF_NEED_RESCHEd and entering the WAIT status. but at least it's going to bring Alchemy back from the dead, so I'm going to apply this patch.] Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com> Cc: Linux-MIPS <linux-mips@linux-mips.org> Cc: Maciej W. Rozycki <macro@linux-mips.org> Patchwork: https://patchwork.linux-mips.org/patch/5408/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * MIPS: Compat: Fix cputime_to_timeval() arguments in compat binfmt_elf.Ralf Baechle2013-06-062-0/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | cputime_to_timeval() takes a struct timeval *as its second argument but a struct compat_timeval * will be passed resulting in: CC arch/mips/kernel/binfmt_elfn32.o In file included from arch/mips/kernel/binfmt_elfn32.c:122:0: arch/mips/kernel/../../../fs/binfmt_elf.c: In function ‘fill_prstatus’: arch/mips/kernel/../../../fs/binfmt_elf.c:1330:3: warning: passing argument 2 of ‘cputime_to_timeval’ from incompatible pointer type [enabled by default] In file included from include/asm-generic/cputime.h:12:0, from /home/ralf/src/linux/linux-mips/arch/mips/include/asm/cputime.h:4, from include/linux/sched.h:28, from include/linux/ptrace.h:5, from include/uapi/linux/elfcore.h:7, from include/linux/elfcore.h:7, from arch/mips/kernel/binfmt_elfn32.c:55: include/asm-generic/cputime_nsecs.h:92:91: note: expected ‘struct timeval *’ but argument is of type ‘struct compat_timeval *’ In file included from arch/mips/kernel/binfmt_elfn32.c:122:0: arch/mips/kernel/../../../fs/binfmt_elf.c:1331:3: warning: passing argument 2 of ‘cputime_to_timeval’ from incompatible pointer type [enabled by default] In file included from include/asm-generic/cputime.h:12:0, from /home/ralf/src/linux/linux-mips/arch/mips/include/asm/cputime.h:4, from include/linux/sched.h:28, from include/linux/ptrace.h:5, from include/uapi/linux/elfcore.h:7, from include/linux/elfcore.h:7, from arch/mips/kernel/binfmt_elfn32.c:55: include/asm-generic/cputime_nsecs.h:92:91: note: expected ‘struct timeval *’ but argument is of type ‘struct compat_timeval *’ In file included from arch/mips/kernel/binfmt_elfn32.c:122:0: arch/mips/kernel/../../../fs/binfmt_elf.c:1336:3: warning: passing argument 2 of ‘cputime_to_timeval’ from incompatible pointer type [enabled by default] In file included from include/asm-generic/cputime.h:12:0, from /home/ralf/src/linux/linux-mips/arch/mips/include/asm/cputime.h:4, from include/linux/sched.h:28, from include/linux/ptrace.h:5, from include/uapi/linux/elfcore.h:7, from include/linux/elfcore.h:7, from arch/mips/kernel/binfmt_elfn32.c:55: include/asm-generic/cputime_nsecs.h:92:91: note: expected ‘struct timeval *’ but argument is of type ‘struct compat_timeval *’ In file included from arch/mips/kernel/binfmt_elfn32.c:122:0: arch/mips/kernel/../../../fs/binfmt_elf.c:1337:3: warning: passing argument 2 of ‘cputime_to_timeval’ from incompatible pointer type [enabled by default] In file included from include/asm-generic/cputime.h:12:0, from /home/ralf/src/linux/linux-mips/arch/mips/include/asm/cputime.h:4, from include/linux/sched.h:28, from include/linux/ptrace.h:5, from include/uapi/linux/elfcore.h:7, from include/linux/elfcore.h:7, from arch/mips/kernel/binfmt_elfn32.c:55: include/asm-generic/cputime_nsecs.h:92:91: note: expected ‘struct timeval *’ but argument is of type ‘struct compat_timeval *’ In file included from arch/mips/kernel/binfmt_elfn32.c:122:0: arch/mips/kernel/../../../fs/binfmt_elf.c:1339:2: warning: passing argument 2 of ‘cputime_to_timeval’ from incompatible pointer type [enabled by default] In file included from include/asm-generic/cputime.h:12:0, from /home/ralf/src/linux/linux-mips/arch/mips/include/asm/cputime.h:4, from include/linux/sched.h:28, from include/linux/ptrace.h:5, from include/uapi/linux/elfcore.h:7, from include/linux/elfcore.h:7, from arch/mips/kernel/binfmt_elfn32.c:55: include/asm-generic/cputime_nsecs.h:92:91: note: expected ‘struct timeval *’ but argument is of type ‘struct compat_timeval *’ In file included from arch/mips/kernel/binfmt_elfn32.c:122:0: arch/mips/kernel/../../../fs/binfmt_elf.c:1340:2: warning: passing argument 2 of ‘cputime_to_timeval’ from incompatible pointer type [enabled by default] In file included from include/asm-generic/cputime.h:12:0, from /home/ralf/src/linux/linux-mips/arch/mips/include/asm/cputime.h:4, from include/linux/sched.h:28, from include/linux/ptrace.h:5, from include/uapi/linux/elfcore.h:7, from include/linux/elfcore.h:7, from arch/mips/kernel/binfmt_elfn32.c:55: include/asm-generic/cputime_nsecs.h:92:91: note: expected ‘struct timeval *’ but argument is of type ‘struct compat_timeval *’ AS arch/mips/kernel/scall64-n32.o CC arch/mips/kernel/signal_n32.o CC arch/mips/kernel/binfmt_elfo32.o In file included from arch/mips/kernel/binfmt_elfo32.c:165:0: arch/mips/kernel/../../../fs/binfmt_elf.c: In function ‘fill_prstatus’: arch/mips/kernel/../../../fs/binfmt_elf.c:1330:3: warning: passing argument 2 of ‘cputime_to_timeval’ from incompatible pointer type [enabled by default] In file included from include/asm-generic/cputime.h:12:0, from /home/ralf/src/linux/linux-mips/arch/mips/include/asm/cputime.h:4, from include/linux/sched.h:28, from include/linux/ptrace.h:5, from include/uapi/linux/elfcore.h:7, from include/linux/elfcore.h:7, from arch/mips/kernel/binfmt_elfo32.c:78: include/asm-generic/cputime_nsecs.h:92:91: note: expected ‘struct timeval *’ but argument is of type ‘struct compat_timeval *’ In file included from arch/mips/kernel/binfmt_elfo32.c:165:0: arch/mips/kernel/../../../fs/binfmt_elf.c:1331:3: warning: passing argument 2 of ‘cputime_to_timeval’ from incompatible pointer type [enabled by default] In file included from include/asm-generic/cputime.h:12:0, from /home/ralf/src/linux/linux-mips/arch/mips/include/asm/cputime.h:4, from include/linux/sched.h:28, from include/linux/ptrace.h:5, from include/uapi/linux/elfcore.h:7, from include/linux/elfcore.h:7, from arch/mips/kernel/binfmt_elfo32.c:78: include/asm-generic/cputime_nsecs.h:92:91: note: expected ‘struct timeval *’ but argument is of type ‘struct compat_timeval *’ In file included from arch/mips/kernel/binfmt_elfo32.c:165:0: arch/mips/kernel/../../../fs/binfmt_elf.c:1336:3: warning: passing argument 2 of ‘cputime_to_timeval’ from incompatible pointer type [enabled by default] In file included from include/asm-generic/cputime.h:12:0, from /home/ralf/src/linux/linux-mips/arch/mips/include/asm/cputime.h:4, from include/linux/sched.h:28, from include/linux/ptrace.h:5, from include/uapi/linux/elfcore.h:7, from include/linux/elfcore.h:7, from arch/mips/kernel/binfmt_elfo32.c:78: include/asm-generic/cputime_nsecs.h:92:91: note: expected ‘struct timeval *’ but argument is of type ‘struct compat_timeval *’ In file included from arch/mips/kernel/binfmt_elfo32.c:165:0: arch/mips/kernel/../../../fs/binfmt_elf.c:1337:3: warning: passing argument 2 of ‘cputime_to_timeval’ from incompatible pointer type [enabled by default] In file included from include/asm-generic/cputime.h:12:0, from /home/ralf/src/linux/linux-mips/arch/mips/include/asm/cputime.h:4, from include/linux/sched.h:28, from include/linux/ptrace.h:5, from include/uapi/linux/elfcore.h:7, from include/linux/elfcore.h:7, from arch/mips/kernel/binfmt_elfo32.c:78: include/asm-generic/cputime_nsecs.h:92:91: note: expected ‘struct timeval *’ but argument is of type ‘struct compat_timeval *’ In file included from arch/mips/kernel/binfmt_elfo32.c:165:0: arch/mips/kernel/../../../fs/binfmt_elf.c:1339:2: warning: passing argument 2 of ‘cputime_to_timeval’ from incompatible pointer type [enabled by default] In file included from include/asm-generic/cputime.h:12:0, from /home/ralf/src/linux/linux-mips/arch/mips/include/asm/cputime.h:4, from include/linux/sched.h:28, from include/linux/ptrace.h:5, from include/uapi/linux/elfcore.h:7, from include/linux/elfcore.h:7, from arch/mips/kernel/binfmt_elfo32.c:78: include/asm-generic/cputime_nsecs.h:92:91: note: expected ‘struct timeval *’ but argument is of type ‘struct compat_timeval *’ In file included from arch/mips/kernel/binfmt_elfo32.c:165:0: arch/mips/kernel/../../../fs/binfmt_elf.c:1340:2: warning: passing argument 2 of ‘cputime_to_timeval’ from incompatible pointer type [enabled by default] In file included from include/asm-generic/cputime.h:12:0, from /home/ralf/src/linux/linux-mips/arch/mips/include/asm/cputime.h:4, from include/linux/sched.h:28, from include/linux/ptrace.h:5, from include/uapi/linux/elfcore.h:7, from include/linux/elfcore.h:7, from arch/mips/kernel/binfmt_elfo32.c:78: include/asm-generic/cputime_nsecs.h:92:91: note: expected ‘struct timeval *’ but argument is of type ‘struct compat_timeval *’ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * MIPS: rtlx: Fix implicit declaration of function set_vi_handler()Yoichi Yuasa2013-06-061-0/+1
| | | | | | | | | | | | | | | | | | | | arch/mips/kernel/rtlx.c: In function 'rtlx_module_init': arch/mips/kernel/rtlx.c:523:3: error: implicit declaration of function 'set_vi_handler' [-Werror=implicit-function-declaration] Signed-off-by: Yoichi Yuasa <yuasa@linux-mips.org> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/5340/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * MIPS: Trap exception handling fixesMaciej W. Rozycki2013-05-231-13/+15
| | | | | | | | | | | | | | | | | | | | | | 2a0b24f56c2492b932f1aed617ae80fb23500d21 broke Trap exception handling in the standard MIPS mode. Additionally the microMIPS-mode trap code mask is wrong, as it's a 4-bit field. Here's a fix. Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/5309/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | sched: Rename sched.c as sched/core.c in comments and DocumentationViresh Kumar2013-06-192-4/+5
|/ | | | | | | | | | | | | | | | | Most of the stuff from kernel/sched.c was moved to kernel/sched/core.c long time back and the comments/Documentation never got updated. I figured it out when I was going through sched-domains.txt and so thought of fixing it globally. I haven't crossed check if the stuff that is referenced in sched/core.c by all these files is still present and hasn't changed as that wasn't the motive behind this patch. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/cdff76a265326ab8d71922a1db5be599f20aad45.1370329560.git.viresh.kumar@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
* MIPS: N64: Wire getdents64(2)Aron Xu2013-05-221-0/+1
| | | | | | | | | | | | | | | | | | | As a relatively new ABI, N64 only had getdents syscall while other modern architectures have getdents64. This was noticed when Python 3.3 shifted to the latter one for aarch64. [ralf@linux-mips.org: The history of getdents64 is a little complicated. Commit 1a1d77dd589de5a567fa95e36aa6999c704ceca4 [Merge with 2.4.0-test7.] added N64 getdents(2) to arch/mips64/kernel/scall_64.S as syscall 5213, then dropped again in 578720675c44e54e8aa7c68f6dce59ed37ce3d3b [Overhaul of the 64-bit syscall interface. Now heritage free.] for 2.5.18 in 2002.] Signed-off-by: Aron Xu <aron@debian.org> Acked-by: David Daney <david.daney@cavium.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/5285/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* kprobes/mips: Fix to check double free of insn slotMasami Hiramatsu2013-05-221-1/+4
| | | | | | | | | | | | | | | | | | Fix to check double free of insn_slot at arch_remove_kprobe as other arches do. Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: David Daney <ddaney@caviumnetworks.com> Cc: Maneesh Soni <manesoni@cisco.com> Cc: Victor Kamensky <kamensky@cisco.com> Cc: linux-mips@linux-mips.org Cc: Ingo Molnar <mingo@redhat.com> Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Cc: yrl.pp-manager.tt@hitachi.com Cc: systemtap@sourceware.org Patchwork: https://patchwork.linux-mips.org/patch/5293/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Idle: Break r4k_wait into two functions and fix it.Ralf Baechle2013-05-222-3/+9
| | | | | | | | | | | | local_irq_enable() may expand into very different code, so it rather should stay in C. Also this keeps the assembler code size constant which keeps the rollback code simple. So it's best to split r4k_wait into two parts, one C and one assembler. Finally add the local_irq_enable() to r4k_wait to ensure the WAIT instruction in __r4k_wait() will work properly. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Idle: Do address fiddlery in helper functions.Ralf Baechle2013-05-222-6/+4
| | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Idle: Consolidate all declarations in <asm/idle.h>.Ralf Baechle2013-05-225-4/+5
| | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Idle: Don't call local_irq_disable() in cpu_wait() implementations.Ralf Baechle2013-05-221-3/+0
| | | | | | The generic idle loop has already disabled interrupts so this is redundant. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Idle: Re-enable irqs at the end of r3081, au1k and loongson2 cpu_wait.Ralf Baechle2013-05-221-0/+2
| | | | | | | | | | Without this, the WARN_ON_ONCE(irqs_disabled()); in the idle loop will be triggered. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Idle: Make call of function pointer readable.Ralf Baechle2013-05-221-1/+1
| | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Idle: Consistently reformat inline assembler.Ralf Baechle2013-05-221-18/+21
| | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Idle: cleaup SMTC idle hook as per Linux coding style.Ralf Baechle2013-05-221-2/+7
| | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Consolidate idle loop / WAIT instruction support in a single file.Ralf Baechle2013-05-224-212/+233
| | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Extract schedule_mfi info from __scheduleTony Wu2013-05-171-2/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | | | schedule_mfi is supposed to be extracted from schedule(), and is used in thread_saved_pc and get_wchan. But, after optimization, schedule() is reduced to a sibling call to __schedule(), and no real frame info can be extracted. One solution is to compile schedule() with -fno-omit-frame-pointer and -fno-optimize-sibling-calls, but that will incur performance degradation. Another solution is to extract info from the real scheduler, __schedule, and this is the approache adopted here. This patch reads the __schedule address by either following the 'j' call in schedule if KALLSYMS is disabled or by using kallsyms_lookup_name to lookup __schedule if KALLSYMS is available, then, extracts schedule_mfi from __schedule frame info. This patch also fixes the "Can't analyze schedule() prologue" warning at boot time. Signed-off-by: Tony Wu <tung7970@gmail.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/5237/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Fix sibling call handling in get_frame_infoTony Wu2013-05-171-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Given a function, get_frame_info() analyzes its instructions to figure out frame size and return address. get_frame_info() works as follows: 1. analyze up to 128 instructions if the function size is unknown 2. search for 'addiu/daddiu sp,sp,-immed' for frame size 3. search for 'sw ra,offset(sp)' for return address 4. end search when it sees jr/jal/jalr This leads to an issue when the given function is a sibling call, example shown as follows. 801ca110 <schedule>: 801ca110: 8f820000 lw v0,0(gp) 801ca114: 8c420000 lw v0,0(v0) 801ca118: 080726f0 j 801c9bc0 <__schedule> 801ca11c: 00000000 nop 801ca120 <io_schedule>: 801ca120: 27bdffe8 addiu sp,sp,-24 801ca124: 3c028022 lui v0,0x8022 801ca128: afbf0014 sw ra,20(sp) In this case, get_frame_info() cannot properly detect schedule's frame info, and eventually returns io_schedule's instead. This patch adds 'j' to the end search condition to workaround sibling call cases. Signed-off-by: Tony Wu <tung7970@gmail.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/5236/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Fix build error for crash_dump.c in 3.10-rc1EunBong Song2013-05-171-0/+1
| | | | | | | | | | | | | | This patch fixes crash_dump.c build error. Build error logs are as follow. arch/mips/kernel/crash_dump.c: In function 'kdump_buf_page_init': arch/mips/kernel/crash_dump.c:67: error: implicit declaration of function 'kmalloc' arch/mips/kernel/crash_dump.c:67: error: assignment makes pointer from integer without a cast Signed-off-by: EunBong Song <eunb.song@samsung.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/5238/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* Revert "MIPS: Allow ASID size to be determined at boot time."David Daney2013-05-163-10/+8
| | | | | | | | | | | | | | | | | | | | | | | | This reverts commit d532f3d26716a39dfd4b88d687bd344fbe77e390. The original commit has several problems: 1) Doesn't work with 64-bit kernels. 2) Calls TLBMISS_HANDLER_SETUP() before the code is generated. 3) Calls TLBMISS_HANDLER_SETUP() twice in per_cpu_trap_init() when only one call is needed. [ralf@linux-mips.org: Also revert the bits of the ASID patch which were hidden in the KVM merge.] Signed-off-by: David Daney <david.daney@cavium.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Cc: "Steven J. Hill" <Steven.Hill@imgtec.com> Cc: David Daney <david.daney@cavium.com> Patchwork: https://patchwork.linux-mips.org/patch/5242/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* Merge branch 'for-linus' of ↵Linus Torvalds2013-05-102-8/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal Pull stray syscall bits from Al Viro: "Several syscall-related commits that were missing from the original" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal: switch compat_sys_sysctl to COMPAT_SYSCALL_DEFINE unicore32: just use mmap_pgoff()... unify compat fanotify_mark(2), switch to COMPAT_SYSCALL_DEFINE x86, vm86: fix VM86 syscalls: use SYSCALL_DEFINEx(...)
| * unify compat fanotify_mark(2), switch to COMPAT_SYSCALL_DEFINEAl Viro2013-05-092-8/+1
| | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linusLinus Torvalds2013-05-1023-364/+2172
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull MIPS updates from Ralf Baechle: - More work on DT support for various platforms - Various fixes that were to late to make it straight into 3.9 - Improved platform support, in particular the Netlogic XLR and BCM63xx, and the SEAD3 and Malta eval boards. - Support for several Ralink SOC families. - Complete support for the microMIPS ASE which basically reencodes the existing MIPS32/MIPS64 ISA to use non-constant size instructions. - Some fallout from LTO work which remove old cruft and will generally make the MIPS kernel easier to maintain and resistant to compiler optimization, even in absence of LTO. - KVM support. While MIPS has announced hardware virtualization extensions this KVM extension uses trap and emulate mode for virtualization of MIPS32. More KVM work to add support for VZ hardware virtualizaiton extensions and MIPS64 will probably already be merged for 3.11. Most of this has been sitting in -next for a long time. All defconfigs have been build or run time tested except three for which fixes are being sent by other maintainers. Semantic conflict with kvm updates done as per Ralf * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (118 commits) MIPS: Add new GIC clockevent driver. MIPS: Formatting clean-ups for clocksources. MIPS: Refactor GIC clocksource code. MIPS: Move 'gic_frequency' to common location. MIPS: Move 'gic_present' to common location. MIPS: MIPS16e: Add unaligned access support. MIPS: MIPS16e: Support handling of delay slots. MIPS: MIPS16e: Add instruction formats. MIPS: microMIPS: Optimise 'strnlen' core library function. MIPS: microMIPS: Optimise 'strlen' core library function. MIPS: microMIPS: Optimise 'strncpy' core library function. MIPS: microMIPS: Optimise 'memset' core library function. MIPS: microMIPS: Add configuration option for microMIPS kernel. MIPS: microMIPS: Disable LL/SC and fix linker bug. MIPS: microMIPS: Add vdso support. MIPS: microMIPS: Add unaligned access support. MIPS: microMIPS: Support handling of delay slots. MIPS: microMIPS: Add support for exception handling. MIPS: microMIPS: Floating point support. MIPS: microMIPS: Fix macro naming in micro-assembler. ...
| * \ Merge branch 'mti-next' of ↵Ralf Baechle2013-05-0917-333/+2029
| |\ \ | | | | | | | | | | | | git://git.linux-mips.org/pub/scm/sjhill/linux-sjhill into mips-for-linux-next
| | * | MIPS: Add new GIC clockevent driver.Raghu Gandham2013-05-094-1/+141
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add new clockevent driver that uses the counter present on the MIPS Global Interrupt Controller. Signed-off-by: Raghu Gandham <Raghu.Gandham@imgtec.com> Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
| | * | MIPS: Formatting clean-ups for clocksources.Steven J. Hill2013-05-091-3/+0
| | | | | | | | | | | | | | | | | | | | | | | | Various whitespace and #ifdef removals for GIC and R4K clocksources. Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
| | * | MIPS: Refactor GIC clocksource code.Steven J. Hill2013-05-093-12/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Reorganize some of the GIC clocksource driver code. Below is a list of the various changes. * No longer select CSRC_GIC by default for Malta platform. * Limit choice for either the GIC or R4K clocksource, not both. * Change location in Makefile. * Created new 'gic_read_count' function in common 'irq-gic.c' file. * Change 'git_hpt_read' function in 'csrc-gic.c' to use new function. * Surround GIC specific code in Malta platform code with #ifdef's. * Only initialize the GIC clocksource if it was selected. Original code called it unconditionally if a GIC was found. Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
| | * | MIPS: Move 'gic_frequency' to common location.Steven J. Hill2013-05-091-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Move the global variable 'gic_frequency' to be defined in the file 'arch/mips/kernel/irq-gic.c' instead of defining it individually for each platform making use of the GIC. Also change the type to be an unsigned integer instead of signed. Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
| | * | MIPS: Move 'gic_present' to common location.Steven J. Hill2013-05-092-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Move the global variable 'gic_present' to be defined in the file 'arch/mips/kernel/irq-gic.c' instead of defining it individually for each platform making use of the GIC. Also change the type to be an unsigned integer instead of signed. Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
| | * | MIPS: MIPS16e: Add unaligned access support.Steven J. Hill2013-05-091-0/+255
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Add logic needed to handle unaligned accesses in MIPS16e mode. Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com> Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
| | * | MIPS: MIPS16e: Support handling of delay slots.Steven J. Hill2013-05-091-5/+98
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Add logic needed to properly calculate exceptions for delay slots when in MIPS16e mode. Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
| | * | MIPS: microMIPS: Add configuration option for microMIPS kernel.Steven J. Hill2013-05-091-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds the option to build the Linux kernel using only the microMIPS ISA. The resulting kernel binary is, at a minimum, 20% smaller than using the MIPS32R2 ISA. Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
| | * | MIPS: microMIPS: Add vdso support.Douglas Leung2013-05-091-0/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Support vdso in microMIPS mode. Signed-off-by: Douglas Leung <Douglas.Leung@imgtec.com> Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
| | * | MIPS: microMIPS: Add unaligned access support.Leonid Yegoshin2013-05-092-201/+1112
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Add logic needed to handle unaligned accesses in microMIPS mode. Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com> Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
| | * | MIPS: microMIPS: Support handling of delay slots.Leonid Yegoshin2013-05-091-0/+85
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add logic needed to properly calculate exceptions for delay slots when in microMIPS mode. Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
| | * | MIPS: microMIPS: Add support for exception handling.Steven J. Hill2013-05-095-101/+277
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | All exceptions must be taken in microMIPS mode, never in classic MIPS mode or the kernel falls apart. A few NOP instructions are used to maintain the correct alignment of microMIPS versions of the exception vectors. Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
| | * | MIPS: microMIPS: Floating point support.Leonid Yegoshin2013-05-092-5/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Add logic needed to do floating point emulation in microMIPS mode. Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Signed-off-by: Steven J. Hill <Steven. Hill@imgtec.com>
| | * | MIPS: Allow ASID size to be determined at boot time.Steven J. Hill2013-05-083-8/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Original patch by Ralf Baechle and removed by Harold Koerfgen with commit f67e4ffc79905482c3b9b8c8dd65197bac7eb508. This allows for more generic kernels since the size of the ASID and corresponding masks can be determined at run-time. This patch is also required for the new Aptiv cores and has been tested on Malta and Malta Aptiv platforms. [ralf@linux-mips.org: Added relevant part of fix https://patchwork.linux-mips.org/patch/5213/] Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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