summaryrefslogtreecommitdiffstats
path: root/arch
Commit message (Collapse)AuthorAgeFilesLines
* [S390] ptrace cleanupMartin Schwidefsky2011-01-0515-263/+347
| | | | | | | Overhaul program event recording and the code dealing with the ptrace user space interface. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] smp/idle: call init_idle() before starting a new cpuHeiko Carstens2011-01-053-7/+5
| | | | | | | | | | | Call init_idle() which (re-)initializes the idle task structure before it gets used on a new cpu. That way we can also get rid of the odd preempt_enable_no_resched() call we have in the cpu offline path within cpu_idle(). That call prevented preempt count imbalances between cpu hotplug operations. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] smp: delay idle task creationHeiko Carstens2011-01-051-15/+26
| | | | | | | | | | | | Delay idle task creation until a cpu gets set online instead of creating them for all possible cpus at system startup. For one cpu system this should safe more than 1 MB. On my debug system with lots of debug stuff enabled this saves 2 MB. Same as on x86. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] dasd: Add support for raw ECKD access.Stefan Haberland2011-01-051-0/+2
| | | | | | | | | | Normal I/O operations through the DASD device driver give only access to the data fields of an ECKD device even for track based I/O. This patch extends the DASD device driver to give access to whole ECKD tracks including count, key and data fields. Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] dasd: Improve handling of stolen DASD reservationStefan Weinhuber2011-01-051-0/+1
| | | | | | | | | | | | If a DASD device has been reserved by a Linux system, and later this reservation is ‘stolen’ by a second system by means of an unconditional reserve, then the first system receives a notification about this fact. With this patch such an event can be either ignored, as before, or it can be used to let the device fail all I/O request, so that the device will not block anymore. Signed-off-by: Stefan Weinhuber <wein@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] nmi: enable machine checks earlyHeiko Carstens2011-01-051-0/+2
| | | | | | | | | | | | Until now machine checks for the swapper process of the IPL cpu are just implicitly (and more or less accidently) enabled when the first time the idle process goes into idle state and loads an enabled wait psw. Before that machine checks are disabled. So let's enable them explicitly in trap_init() so we have a well defined time when machine checks are enabled. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] 31 bit entry.S update.Martin Schwidefsky2011-01-051-103/+109
| | | | | | | | Make the code in the 31 bit entry.S code as similar as possible to the 64 bit version in entry64.S. That makes it easier to add new code to the first level interrupt handler that affects both 31 and 64 bit kernels. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] cio: obtain mdc value per channel pathSebastian Ott2011-01-051-0/+2
| | | | | | | | Add support to accumulate the number of 64K-bytes blocks all paths to a device at least support for a transport command. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] nohz: optimize arch_needs_cpu()Heiko Carstens2011-01-051-1/+1
| | | | | | | | | | arch_needs_cpu() gets always executed on the current cpu. Therefore the cpu parameter can be ignored it is possible to use __get_cpu_var() instead of per_cpu() to access the per_cpu variable, which will generate better code. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] qdio: outbound tasklet scan thresholdJan Glauber2011-01-051-0/+1
| | | | | | | | | | | | | | | | | | Introduce a scan treshold for the qdio outbound queues. By setting the threshold the driver can tell qdio after how much used SBALs qdio should schedule the outbound tasklet that scans the queue for finished SBALs. The threshold is specific by the drivers because a Hipersockets device is much faster in utilizing outbound buffers than a ZFCP or OSA device. The default values after how many used SBALs the tasklet should run are: OSA: > 31 SBALs Hipersockets: > 7 SBALs zfcp: > 55 SBALs Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] hypfs: Move buffer allocation from open to readMichael Holzheu2011-01-056-118/+195
| | | | | | | | | | | Currently the buffer for diagnose data is allocated in the open function of the debugfs file and is released in the close function. This has the drawback that a user (root) can pin that memory by not closing the file. This patch moves the buffer allocation to the read function. The buffer is automatically released after the buffer is copied to userspace. Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] current_thread_info optimizationMartin Schwidefsky2011-01-051-1/+1
| | | | | | | Use thread_info lowcore field for current_thread_info(), saves an unnecessary calculation. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] extint: get rid of early code plus cleanupHeiko Carstens2011-01-052-103/+51
| | | | | | | | Get rid of register/unregister_early_external_interrupt() and clean up the code while at it. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] pfault: delay register of pfault interruptHeiko Carstens2011-01-053-15/+15
| | | | | | | | | | Use an early init call to initialize pfault. That way it is possible to use the register_external_interrupt() instead of the early variant. No need to enable pfault any earlier since it has only effect if user space processes are running. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] ap bus: add support for irq statisticsHolger Dengler2011-01-052-0/+2
| | | | | | | | Add support for AP Bus I/O interrupt statistics in /proc/interrupts. Signed-off-by: Holger Dengler <hd@linux.vnet.ibm.com> Signed-off-by: Felix Beck <felix.beck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] ctc: add support for irq statisticsHeiko Carstens2011-01-052-0/+2
| | | | | | | Add support for CTC I/O interrupt statistics in /proc/interrupts. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] claw: add support for irq statisticsHeiko Carstens2011-01-052-0/+2
| | | | | | | Add support for CLAW I/O interrupt statistics in /proc/interrupts. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] lcs: add support for irq statisticsHeiko Carstens2011-01-052-0/+2
| | | | | | | Add support for LCS I/O interrupt statistics in /proc/interrupts. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] vmur: add support for irq statisticsHeiko Carstens2011-01-052-0/+2
| | | | | | | Add support for VMUR I/O interrupt statistics in /proc/interrupts. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] tape: add support for irq statisticsHeiko Carstens2011-01-052-0/+2
| | | | | | | Add support for ccw based tape I/O interrupt statistics in /proc/interrupts. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] 3270: add support for irq statisticsHeiko Carstens2011-01-052-0/+2
| | | | | | | Add support for 3270 I/O interrupt statistics in /proc/interrupts. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] 3215: add support for irq statisticsHeiko Carstens2011-01-052-0/+2
| | | | | | | Add support for 3215 I/O interrupt statistics in /proc/interrupts. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] dasd: add support for irq statisticsHeiko Carstens2011-01-052-0/+2
| | | | | | | Add support for DASD I/O interrupt statistics in /proc/interrupts. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] qdio: add qdio interrupts to interrupt statisticsJan Glauber2011-01-052-0/+4
| | | | | | | | Count traditional qdio interrupts and adapter interrupts for qdio in the interrupt statistics. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] irq: have detailed statistics for interrupt typesHeiko Carstens2011-01-057-19/+44
| | | | | | | | | | | | | | | | | | | | | | Up to now /proc/interrupts only has statistics for external and i/o interrupts but doesn't split up them any further. This patch adds a line for every single interrupt source so that it is possible to easier tell what the machine is/was doing. Part of the output now looks like this; CPU0 CPU2 CPU4 EXT: 3898 4232 2305 I/O: 782 315 245 CLK: 1029 1964 727 [EXT] Clock Comparator IPI: 2868 2267 1577 [EXT] Signal Processor TMR: 0 0 0 [EXT] CPU Timer TAL: 0 0 0 [EXT] Timing Alert PFL: 0 0 0 [EXT] Pseudo Page Fault [...] NMI: 0 1 1 [NMI] Machine Checks Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] time: let local_tick_enable/disable() reprogram the clock comparatorHeiko Carstens2011-01-052-2/+2
| | | | | | | | | | | Let local_tick_enable/disable() reprogram the clock comparator so the function names make semantically more sense. Also that way the functions are more symmetric since normally each local_tick_enable() call usually would have a subsequent call to set_clock_comparator() anyway. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] time: move local_tick_enable()/disable() to timex.hHeiko Carstens2011-01-052-16/+18
| | | | | | | | | Move the two functions to timex.h where they make more sense than in hardirq.h. No functional change. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] add kprobes annotationsMartin Schwidefsky2011-01-058-9/+26
| | | | | | | Add kprobes annotations to get the massive 'probe kernel.function("*") {}' stress test working. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] kprobes: coding styleMartin Schwidefsky2011-01-051-34/+34
| | | | | | Correct some minor coding style issues. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] kprobes: restructure handler functionMartin Schwidefsky2011-01-051-43/+71
| | | | | | | | Restructure the kprobe breakpoint handler function. Add comments to make it more comprehensible and add a sanity check for re-entering kprobes. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] kprobes: jprobe save and restoreMartin Schwidefsky2011-01-052-13/+8
| | | | | | | Register %r14 and %r15 are already stored in jprobe_saved_regs, no need to store them a second time in jprobe_saved_r14 / jprobe_saved_r15. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] kprobes: insn slotsMartin Schwidefsky2011-01-052-10/+1
| | | | | | | The s390 architecture can execute code on kmalloc/vmalloc memory. No need for the __ARCH_WANT_KPROBES_INSN_SLOT detour. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] kprobes: activation and deactivationMartin Schwidefsky2011-01-051-32/+27
| | | | | | | | Replace set_current_kprobe/reset_current_kprobe/save_previous_kprobe/ restore_previous_kprobe with a simpler scheme push_kprobe/pop_kprobe. The mini kprobes stack can store up to two active kprobes. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] kprobes: instruction fixupMartin Schwidefsky2011-01-052-78/+57
| | | | | | | Determine instruction fixup details in resume_execution, no need to do it beforehand. Remove fixup, ilen and reg from arch_specific_insn. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] kprobes: instruction swapMartin Schwidefsky2011-01-052-12/+9
| | | | | | | Move the definition of the helper structure ins_replace_args to the only place where it is used and drop the old member as it is not needed. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] kprobes: single step cleanupMartin Schwidefsky2011-01-052-44/+36
| | | | | | | | | | | | The saved interrupt mask and the saved control registers are only relevant while single stepping is set up. A secondary kprobe while kprobe single stepping is active may not occur. That makes is safe to remove the save and restore of kprobe_saved_imask / kprobe_save_ctl from save_previous_kprobe and restore_previous_kprobe. Move all single step related code to two functions, enable_singlestep and disable_singlestep. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] kprobes: single stepped breakpointMartin Schwidefsky2011-01-051-6/+0
| | | | | | | | | | Remove special case of a kprobe on a breakpoint while a relocated instruction is single stepped. The only instruction that may cause a fault while kprobe single stepping is active is the relocated instruction. There is no kprobe on the instruction slot retrieved with get_insn_slot(). Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] cleanup s390 KconfigMartin Schwidefsky2011-01-054-164/+130
| | | | | | | | Make use of def_bool and def_tristate where possible and add sensible defaults to the config symbols where applicable. This shortens the defconfig file by another ~40 lines. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* Merge master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds2011-01-0313-156/+62
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * master.kernel.org:/home/rmk/linux-2.6-arm: ARM: pxa: fix page table corruption on resume ARM: it8152: add IT8152_LAST_IRQ definition to fix build error ARM: pxa: PXA_ESERIES depends on FB_W100. ARM: 6605/1: Add missing include "asm/memory.h" ARM: 6540/1: Stop irqsoff trace on return to user ARM: 6537/1: update Nomadik, U300 and Ux500 maintainers ARM: 6536/1: Add missing SZ_{32,64,128} ARM: fix cache-feroceon-l2 after stack based kmap_atomic() ARM: fix cache-xsc3l2 after stack based kmap_atomic() ARM: get rid of kmap_high_l1_vipt() ARM: smp: avoid incrementing mm_users on CPU startup ARM: pxa: PXA_ESERIES depends on FB_W100.
| * Merge branch 'fix' of ↵Russell King2011-01-0338-90/+219
| |\ | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/ycmiao/pxa-linux-2.6
| | * ARM: pxa: fix page table corruption on resumeAric D. Blumer2011-01-031-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Before this patch, the following error would sometimes occur after a resume on pxa3xx: /path/to/mm/memory.c:144: bad pmd 8040542e. The problem was that a temporary page table mapping was being improperly restored. The PXA3xx resume code creates a temporary mapping of resume_turn_on_mmu to avoid a prefetch abort. The pxa3xx_resume_after_mmu code requires that the r1 register holding the address of this mapping not be modified, however, resume_turn_on_mmu does modify it. It is mostly correct in that r1 receives the base table address, but it may also get other bits in 13:0. This results in pxa3xx_resume_after_mmu restoring the original mapping to the wrong place, corrupting memory and leaving the temporary mapping in place. Signed-off-by: Matt Reimer <mreimer@sdgsystems.com> Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
| | * ARM: it8152: add IT8152_LAST_IRQ definition to fix build errorMike Rapoport2011-01-031-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The commit 6ac6b817f3f4c23c5febd960d8deb343e13af5f3 (ARM: pxa: encode IRQ number into .nr_irqs) removed definition of ITE_LAST_IRQ which caused the following build error: CC arch/arm/common/it8152.o arch/arm/common/it8152.c: In function 'it8152_init_irq': arch/arm/common/it8152.c:86: error: 'IT8152_LAST_IRQ' undeclared (first use in this function) arch/arm/common/it8152.c:86: error: (Each undeclared identifier is reported only once arch/arm/common/it8152.c:86: error: for each function it appears in.) make[2]: *** [arch/arm/common/it8152.o] Error 1 Defining the IT8152_LAST_IRQ in the arch/arm/include/hardware/it8152.c fixes the build. Signed-off-by: Mike Rapoport <mike@compulab.co.il> Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
| | * ARM: pxa: PXA_ESERIES depends on FB_W100.Lennert Buytenhek2011-01-031-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | As arch/arm/mach-pxa/eseries.c references w100fb_gpio_{read,write}() directly. Signed-off-by: Lennert Buytenhek <buytenh@secretlab.ca> Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
| * | ARM: 6605/1: Add missing include "asm/memory.h"Axel Lin2011-01-031-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes below build error by adding the missing asm/memory.h, which is needed for arch_is_coherent(). $ make pxa3xx_defconfig; make CC init/do_mounts_rd.o In file included from include/linux/list_bl.h:5, from include/linux/rculist_bl.h:7, from include/linux/dcache.h:7, from include/linux/fs.h:381, from init/do_mounts_rd.c:3: include/linux/bit_spinlock.h: In function 'bit_spin_unlock': include/linux/bit_spinlock.h:61: error: implicit declaration of function 'arch_is_coherent' make[1]: *** [init/do_mounts_rd.o] Error 1 make: *** [init] Error 2 Signed-off-by: Axel Lin <axel.lin@gmail.com> Acked-by: Peter Huewe <peterhuewe@gmx.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * | ARM: 6540/1: Stop irqsoff trace on return to userTodd Android Poynor2010-12-241-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If the irqsoff tracer is in use, stop tracing the interrupt disable interval when returning to userspace. Tracing userspace execution time as interrupts disabled time is not helpful for kernel performance analysis purposes. Only do so if the irqsoff tracer is enabled, to avoid overhead for lockdep, which doesn't care. Signed-off-by: Todd Poynor <toddpoynor@google.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * | ARM: 6536/1: Add missing SZ_{32,64,128}Stephen Warren2010-12-241-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | ... and also remove misleading comment stating that this header is auto-generated. Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Uwe Kleine-Knig <u.kleine-koenig@pengutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * | Merge branch 'fix' of ↵Russell King2010-12-221-0/+1
| |\ \ | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/ycmiao/pxa-linux-2.6
| | * | ARM: pxa: PXA_ESERIES depends on FB_W100.Lennert Buytenhek2010-12-161-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As arch/arm/mach-pxa/eseries.c references w100fb_gpio_{read,write}() directly. Signed-off-by: Lennert Buytenhek <buytenh@secretlab.ca> Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
| * | | Merge branch 'kmap_atomic_fixes' of git://git.linaro.org/people/nico/linuxRussell King2010-12-206-150/+48
| |\ \ \
| | * | | ARM: fix cache-feroceon-l2 after stack based kmap_atomic()Nicolas Pitre2010-12-191-18/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since commit 3e4d3af501 "mm: stack based kmap_atomic()", it is actively wrong to rely on fixed kmap type indices (namely KM_L2_CACHE) as kmap_atomic() totally ignores them and a concurrent instance of it may happily reuse any slot for any purpose. Because kmap_atomic() is now able to deal with reentrancy, we can get rid of the ad hoc mapping here. While the code is made much simpler, there is a needless cache flush introduced by the usage of __kunmap_atomic(). It is not clear if the performance difference to remove that is worth the cost in code maintenance (I don't think there are that many highmem users on that platform anyway) but that should be reconsidered when/if someone cares enough to do some measurements. Signed-off-by: Nicolas Pitre <nicolas.pitre@linaro.org>
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-29 22:46:04 +0000