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* Merge branch 'release' of ↵Linus Torvalds2007-02-068-8/+26
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6: (27 commits) [IA64] swiotlb abstraction (e.g. for Xen) [IA64] swiotlb cleanup [IA64] make swiotlb use bus_to_virt/virt_to_bus [IA64] swiotlb bug fixes [IA64] Hook up getcpu system call for IA64 [IA64] clean up sparsemem memory_present call [IA64] show_mem() for IA64 sparsemem NUMA [IA64] missing exports hwsw_sync_... [IA64] virt_to_page() can be called with NULL arg [IA64] alignment bug in ldscript [IA64] register memory ranges in a consistent manner [IA64] Enable SWIOTLB only when needed [IA64-SGI] Check for TIO errors on shub2 Altix [IA64] remove bogus prototype ia64_esi_init() [IA64] Clear IRQ affinity when unregistered [IA64] fix ACPI Kconfig issues [IA64] Fix NULL-pointer dereference in ia64_machine_kexec() [IA64] find thread for user rbs address [IA64] use snprintf() on features field of /proc/cpuinfo [IA64] enable singlestep on system call ...
| * [IA64] swiotlb abstraction (e.g. for Xen)Jan Beulich2007-02-052-0/+10
| | | | | | | | | | | | | | | | | | Add abstraction so that the file can be used by environments other than IA64 and EM64T, namely for Xen. Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] swiotlb bug fixesJan Beulich2007-02-052-3/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes - marking I-cache clean of pages DMAed to now only done for IA64 - broken multiple inclusion in include/asm-x86_64/swiotlb.h - missing call to mark_clean in swiotlb_sync_sg() - a (perhaps only theoretical) issue in swiotlb_dma_supported() when io_tlb_end is exactly at the end of memory Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] Hook up getcpu system call for IA64Fenghua Yu2007-02-051-1/+3
| | | | | | | | | | | | | | | | getcpu system call returns cpu# and node# on which this system call and its caller are running. This patch hooks up its implementation on IA64. Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] virt_to_page() can be called with NULL argKirill Korotaev2007-02-051-1/+2
| | | | | | | | | | | | | | | | | | It does not return NULL when arg is NULL. Signed-off-by: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> Signed-off-by: Kirill Korotaev <dev@openvz.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] register memory ranges in a consistent mannerBob Picco2007-02-051-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | While pursuing and unrelated issue with 64Mb granules I noticed a problem related to inconsistent use of add_active_range. There doesn't appear any reason to me why FLATMEM versus DISCONTIG_MEM should register memory to add_active_range with different code. So I've changed the code into a common implementation. The other subtle issue fixed by this patch was calling add_active_range in count_node_pages before granule aligning is performed. We were lucky with 16MB granules but not so with 64MB granules. count_node_pages has reserved regions filtered out and as a consequence linked kernel text and data aren't covered by calls to count_node_pages. So linked kernel regions wasn't reported to add_active_regions. This resulted in free_initmem causing numerous bad_page reports. This won't occur with this patch because now all known memory regions are reported by register_active_ranges. Acked-by: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Bob Picco <bob.picco@hp.com> Acked-by: Simon Horman <horms@verge.net.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] remove bogus prototype ia64_esi_init()Alex Williamson2007-02-051-1/+0
| | | | | | | | | | | | | | This function doesn't exist. Signed-off-by: Alex Williamson <alex.williamson@hp.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] enable singlestep on system callbibo,mao2007-02-051-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As is pointed out in http://www.gelato.org/community/view_linear.php?id=1_1036&from=authors&value=Ian%20Wienand#1_1039, if single step on break instruction, the break fault has higher priority than the single-step trap. When the break fault handler is entered, it advances the IP by 1 instruction so break instruction single-stepping is skipped, actually it is next instruction which is single stepped. This patch modifies this, it adds TIF_SINGLESTEP bit for thread flags, and generate a fake sigtrap when single stepping break instruction. Test case in attachment can verify this. Any comments is welcome. Signed-off-by: bibo, mao <bibo.mao@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* | Merge branch 'for-linus' of ↵Linus Torvalds2007-02-062-743/+23
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/jikos/hid * 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jikos/hid: USB HID: handle multi-interface devices for Apple macbook pro properly HID: move away from DEBUG defines in favor of CONFIG_HID_DEBUG USB HID: fix bogus comment in hid_get_class_descriptor() USB HID: remove hid_find_field_by_usage() HID: API - fix leftovers of hidinput API in USB HID HID: hid debug from hid-debug.h to hid layer hid: force feedback driver for PantherLord USB/PS2 2in1 Adapter hid: quirk for multi-input devices with unneeded output reports hid: allow force feedback for multi-input devices
| * | USB HID: handle multi-interface devices for Apple macbook pro properlySoeren Sonnenburg2007-02-051-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some HID devices by Apple have both keyboard and mouse interfaces; the keyboard interface is handled by usbhid, but the mouse (really touchpad) interface must be handled by the separate 'appletouch' driver. Using HID_QUIRK_IGNORE will make hiddev ignore both interfaces, therefore a new quirk flag to ignore only the mouse interface is required. Signed-off-by: Soeren Sonnenburg <kernel@nn7.de> Signed-off-by: Sergey Vlasov <vsu@altlinux.ru> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| * | HID: API - fix leftovers of hidinput API in USB HIDJiri Kosina2007-02-051-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | hidinput_{open,close}() functions do not belong to usbhid, but to the generic HID layer. Move them, and fix hooks in struct hid_device, so that now the callbacks are done to transport-specific _open() functions, but not input_open() functions. Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| * | HID: hid debug from hid-debug.h to hid layerJiri Kosina2007-02-052-741/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | hid-debug.h contains a lot of code, and should not therefore be a header. This patch moves the code to generic hid layer as .c source, and introduces CONFIG_HID_DEBUG to conditionally compile it, instead of playing with #define DEBUG and including hid-debug.h. Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| * | hid: force feedback driver for PantherLord USB/PS2 2in1 AdapterAnssi Hannula2007-02-051-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | Add a force feedback driver for PantherLord USB/PS2 2in1 Adapter, 0810:0001. The device identifies itself as "Twin USB Joystick". Signed-off-by: Anssi Hannula <anssi.hannula@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| * | hid: quirk for multi-input devices with unneeded output reportsAnssi Hannula2007-02-051-0/+1
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add new quirk HID_QUIRK_SKIP_OUTPUT_REPORTS to skip output reports when enumerating reports on a hid-input device. Add this quirk and HID_QUIRK_MULTI_INPUT to 0810:0001. PantherLord Twin USB Joystick, 0810:0001 has separate input reports for 2 distinct game controllers in the same interface, so it needs HID_QUIRK_MULTI_INPUT. However, the device also contains one output report per controller which is used to control the force feedback function, and we do not want those to appear as separate input devices as well. The simplest approach seems to be to add a quirk to skip output reports on 0810:0001, and allow the force feedback driver to handle those. Signed-off-by: Anssi Hannula <anssi.hannula@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* | Merge branch 'for-linus' of ↵Linus Torvalds2007-02-062-2/+3
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/roland/infiniband * 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/roland/infiniband: IB/ehca: Remove obsolete prototypes IB/ehca: Remove use of do_mmap() RDMA/addr: Handle ethernet neighbour updates during route resolution IB: Make sure struct ib_user_mad.data is aligned IB/srp: Don't wait for response when QP is in error state. IB: Return qp pointer as part of ib_wc IB: Include <linux/kref.h> explicitly in <rdma/ib_verbs.h>
| * | IB: Make sure struct ib_user_mad.data is alignedJason Gunthorpe2007-02-041-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make the untyped data region in ib_user_mad have type u64 so that it gets aligned properly. This avoids alignment faults in ib_umad when casting the data field to an rmpp_mad and accessing the 64-bit tid field on architectures like ia64. Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
| * | IB: Return qp pointer as part of ib_wcMichael S. Tsirkin2007-02-041-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | struct ib_wc currently only includes the local QP number: this matches the IB spec, but seems mostly useless. The following patch replaces this with the pointer to qp itself, and updates all low level drivers and all users. This has the following advantages: - Ability to get a per-qp context through wc->qp->qp_context - Existing drivers already have the qp pointer ready in poll cq, so this change actually saves a tiny bit (extra memory read) on data path (for ehca it would actually be expensive to find the QP pointer when polling a CQ, but ehca does not support SRQ so we can leave wc->qp as NULL for ehca) - Users that need the QP number can still get it through wc->qp->qp_num Use case: In IPoIB connected mode code, I have a common CQ shared by multiple QPs. To track connection usage, I need a way to get at some per-QP context upon the completion, and I would like to avoid allocating context object per work request just to stick a QP pointer into it. With this code, I can just use wc->qp->qp_context. Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
| * | IB: Include <linux/kref.h> explicitly in <rdma/ib_verbs.h>Michael S. Tsirkin2007-02-041-0/+1
| |/ | | | | | | | | | | | | | | <rdma/ib_verbs.h> uses struct kref, so it should include <linux/kref.h> explicitly to avoid hidden include dependencies. Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
* | Merge branch 'for-linus' of ↵Linus Torvalds2007-02-066-23/+43
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc: (32 commits) mmc: tifm: replace kmap with page_address mmc: sdhci: fix voltage ocr mmc: sdhci: replace kmap with page_address mmc: wbsd: replace kmap with page_address mmc: handle pci_enable_device() return value in sdhci mmc: Proper unclaim in mmc_block mmc: change wbsd mailing list mmc: Graceful fallback for fancy features mmc: Handle wbsd's stupid command list mmc: Allow host drivers to specify max block count mmc: Allow host drivers to specify a max block size tifm_sd: add suspend and resume functionality tifm_core: add suspend/resume infrastructure for tifm devices tifm_7xx1: prettify tifm_7xx1: recognize device 0xac8f as supported tifm_7xx1: switch from workqueue to kthread tifm_7xx1: Merge media insert and media remove functions tifm_7xx1: simplify eject function Add dummy_signal_irq function to save check in ISR Remove unused return value from signal_irq callback ...
| * | mmc: Allow host drivers to specify max block countPierre Ossman2007-02-041-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Many controllers have an upper limit on the number of blocks that can be transferred in one request. Allow the host drivers to specify this and make sure we avoid hitting this limit. Also change the max_sectors field to avoid confusion. This makes it map less directly to the block layer limits, but as they didn't apply directly on MMC cards anyway, this isn't a great loss. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
| * | mmc: Allow host drivers to specify a max block sizePierre Ossman2007-02-041-0/+1
| | | | | | | | | | | | | | | | | | | | | Most controllers have an upper limit on the block size. Allow the host drivers to specify this and make sure we avoid hitting this limit. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
| * | tifm_core: add suspend/resume infrastructure for tifm devicesAlex Dubov2007-02-041-0/+3
| | | | | | | | | | | | | | | Signed-off-by: Alex Dubov <oakad@yahoo.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
| * | tifm_7xx1: recognize device 0xac8f as supportedAlex Dubov2007-02-041-0/+3
| | | | | | | | | | | | | | | | | | | | | This patch also adds symbolic defines for supported pci ids. Signed-off-by: Alex Dubov <oakad@yahoo.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
| * | tifm_7xx1: switch from workqueue to kthreadAlex Dubov2007-02-041-6/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As there's only one work item (media_switcher) to handle and it's effectively serialized with itself, I found it more convenient to use kthread instead of workqueue. This also allows for a working implementation of suspend/resume, which were totally broken in the past version. Signed-off-by: Alex Dubov <oakad@yahoo.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
| * | tifm_7xx1: Merge media insert and media remove functionsAlex Dubov2007-02-041-11/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Hardware does not say whether card was inserted or removed when reporting socket events. Moreover, during suspend, media can be removed or switched to some other card type without notification. Therefore, for each socket in the change set the following is performed: 1. If there's active device in the socket it's unregistered 2. Media detection is performed 3. If detection recognizes supportable media, new device is registered This patch also alters some macros and variable names to enhance clarity. Signed-off-by: Alex Dubov <oakad@yahoo.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
| * | Remove unused return value from signal_irq callbackAlex Dubov2007-02-041-1/+1
| | | | | | | | | | | | | | | Signed-off-by: Alex Dubov <oakad@yahoo.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
| * | tifm_sd: restructure initialization, removal and command handlingAlex Dubov2007-02-041-3/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In order to support correct suspend and resume several changes were needed: 1. Switch from work_struct to tasklet for command handling. When device suspend is called workqueues are already frozen and can not be used. 2. Separate host initialization code from driver's probe and don't rely on interrupts for host initialization. This, in turn, addresses two problems: a) Resume needs to re-initialize the host, but can not assume that device interrupts were already re-armed. b) Previously, probe will return successfully before really knowing the state of the host, as host interrupts were not armed in time. Now it uses polling to determine the real host state before returning. 3. Separate termination code from driver's remove. Termination may be caused by resume, if media changed type or became unavailable during suspend. Signed-off-by: Alex Dubov <oakad@yahoo.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
| * | mmc: Add support for SDHC cardsPhilip Langdale2007-02-043-1/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Thanks to the generous donation of an SDHC card by John Gilmore, and the surprisingly enlightened decision by the SD Card Association to publish useful specs, I've been able to bash out support for SDHC. The changes are not too profound: i) Add a card flag indicating the card uses block level addressing and check it in the block driver. As we never took advantage of byte-level addressing, this simply involves skipping the block -> byte translation when sending commands. ii) The layout of the CSD is changed - a set of fields are discarded to make space for a larger C_SIZE. We did not reference any of the discarded fields except those related to the C_SIZE. iii) Read and write timeouts are fixed values and not calculated from CSD values. iv) Before invoking SEND_APP_OP_COND, we must invoke the new SEND_IF_COND to inform the card we support SDHC. Signed-off-by: Philipl Langdale <philipl@overt.org> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
| * | mmc: Power quirk for ENE controllersDarren Salt2007-02-041-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Support for these devices was broken for 2.6.18-rc1 and later by commit 146ad66eac836c0b976c98f428d73e1f6a75270d, which added voltage level support. This restores the previous behaviour for these devices by ensuring that when the voltage is changed, only one write to set the voltage is performed. It may be that both writes are needed if the voltage is being changed between two non-zero values or that it's safe to ensure that only one write is done if the hardware only supports one voltage; I don't know whether either is the case nor can I test since I have only the one SD reader (1524:0550), and it supports just the one voltage. Signed-off-by: Darren Salt <linux@youmustbejoking.demon.co.uk> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
| * | mmc: let host be parent of cardsPierre Ossman2007-02-041-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | Change the parent of cards to be a specific host (a class device), not the physical controller. This is particularly useful when the hardware has multiple slots, meaning multiple hosts. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
| * | mmc: replace host->card_busyPierre Ossman2007-02-041-2/+3
| |/ | | | | | | | | | | | | | | As card_busy was only used to indicate if the host was exclusively claimed and not really used to identify a particular card, replacing it with just a boolean makes things a lot more easily understandable. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
* | Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6Linus Torvalds2007-02-0623-71/+790
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6: (37 commits) [S390] Avoid excessive inlining. [S390] Mark kernel text section read-only. [S390] Convert memory detection into C code. [S390] Calibrate delay and bogomips. [S390] Hypervisor filesystem (s390_hypfs) for z/VM [S390] Add crypto support for 3592 tape devices [S390] boot from NSS support [S390] Support for s390 Pseudo Random Number Generator [S390] ETR support. [S390] noexec protection [S390] move crypto options and some cleanup. [S390] cio: Don't spam debug feature. [S390] Cleanup of CHSC event handling. [S390] cio: declare hardware structures packed. [S390] Add set_fs(USER_DS) to start_thread(). [S390] cio: Catch operand exceptions on stsch. [S390] Fix register usage description. [S390] kretprobe_trampoline_holder() in wrong section. [S390] Fix kprobes breakpoint handling. [S390] Update maintainers file. ...
| * | [S390] Mark kernel text section read-only.Heiko Carstens2007-02-051-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Set read-only flag in the page table entries for the kernel image text section. This will catch all instruction caused corruptions withing the text section. Instruction replacement via kprobes still works, since it bypasses now dynamic address translation. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] Convert memory detection into C code.Heiko Carstens2007-02-053-3/+51
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Hopefully this will make it more maintainable and less error prone. Code makes use of search_exception_tables(). Since it calls this function before the kernel exeception table is sorted, there is an early call to sort_main_extable(). This way it's easy to use the already present infrastructure of fixup sections. Also this would allows to easily convert the rest of head[31|64].S into C code. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] Calibrate delay and bogomips.Martin Schwidefsky2007-02-052-0/+67
| | | | | | | | | | | | | | | | | | | | | | | | | | | Preset the bogomips number to the cpu capacity value reported by store system information in SYSIB 1.2.2. This value is constant for a particular machine model and can be used to determine relative performance differences between machines. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] Add crypto support for 3592 tape devicesMichael Holzheu2007-02-051-4/+68
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 3592 tape devices are able to write data encrpyted on tape mediums. This z/Linux device driver support includes the following functions: * ioctl to switch on/off encryption * ioctl to query encryption status of drive * ioctls to set and query key encrypting keys (kekls) * long busy interrupt handling Signed-off-by: Michael Holzheu <holzheu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] boot from NSS supportHongjie Yang2007-02-051-1/+7
| | | | | | | | | | | | | | | | | | | | | Add support to boot from a named saved segment (NSS). Signed-off-by: Hongjie Yang <hongjie@us.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] Support for s390 Pseudo Random Number GeneratorJan Glauber2007-02-051-0/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Starting with the z9 the CPU Cryptographic Assist Facility comes with an integrated Pseudo Random Number Generator. The generator creates random numbers by an algorithm similar to the ANSI X9.17 standard. The pseudo-random numbers can be accessed via a character device driver node called /dev/prandom. Similar to /dev/urandom any amount of bytes can be read from the device without blocking. Signed-off-by: Jan Glauber <jan.glauber@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] ETR support.Martin Schwidefsky2007-02-053-1/+256
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds support for clock synchronization to an external time reference (ETR). The external time reference sends an oscillator signal and a synchronization signal every 2^20 microseconds to keep the TOD clocks of all connected servers in sync. For availability two ETR units can be connected to a machine. If the clock deviates for more than the sync-check tolerance all cpus get a machine check that indicates that the clock is out of sync. For the lovely details how to get the clock back in sync see the code below. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] noexec protectionGerald Schaefer2007-02-0512-54/+307
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This provides a noexec protection on s390 hardware. Our hardware does not have any bits left in the pte for a hw noexec bit, so this is a different approach using shadow page tables and a special addressing mode that allows separate address spaces for code and data. As a special feature of our "secondary-space" addressing mode, separate page tables can be specified for the translation of data addresses (storage operands) and instruction addresses. The shadow page table is used for the instruction addresses and the standard page table for the data addresses. The shadow page table is linked to the standard page table by a pointer in page->lru.next of the struct page corresponding to the page that contains the standard page table (since page->private is not really private with the pte_lock and the page table pages are not in the LRU list). Depending on the software bits of a pte, it is either inserted into both page tables or just into the standard (data) page table. Pages of a vma that does not have the VM_EXEC bit set get mapped only in the data address space. Any try to execute code on such a page will cause a page translation exception. The standard reaction to this is a SIGSEGV with two exceptions: the two system call opcodes 0x0a77 (sys_sigreturn) and 0x0aad (sys_rt_sigreturn) are allowed. They are stored by the kernel to the signal stack frame. Unfortunately, the signal return mechanism cannot be modified to use an SA_RESTORER because the exception unwinding code depends on the system call opcode stored behind the signal stack frame. This feature requires that user space is executed in secondary-space mode and the kernel in home-space mode, which means that the addressing modes need to be switched and that the noexec protection only works for user space. After switching the addressing modes, we cannot use the mvcp/mvcs instructions anymore to copy between kernel and user space. A new mvcos instruction has been added to the z9 EC/BC hardware which allows to copy between arbitrary address spaces, but on older hardware the page tables need to be walked manually. Signed-off-by: Gerald Schaefer <geraldsc@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] Add set_fs(USER_DS) to start_thread().Heiko Carstens2007-02-051-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | Currently works anyway since search_binary_handler has a set_fs(USER_DS). But start_thread() is the place where this should be done. Following all other architectures... Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] Small barrier() and cpu_relax() cleanup.Heiko Carstens2007-02-051-3/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | cpu_relax() has barrier() semantics hence there is no need to use both of them in conjunction in sclp_sync_wait(). Also change cpu_relax() so it's more obvious that it has barrier semantics. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] Simplify virt_to_phys.Heiko Carstens2007-02-051-4/+0
| | | | | | | | | | | | | | | | | | | | | | | | No need to use lrag in 64 bit addressing mode since lra will do the same. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] Get rid of a lot of sparse warnings.Heiko Carstens2007-02-056-1/+15
| |/ | | | | | | | | Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | [MIPS] Comment fixChris Dearman2007-02-061-1/+2
| | | | | | | | | | Signed-off-by: Chris Dearman <chris@mips.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | [MIPS] MT: Nuke duplicate mips_mt_regdump() prototype.Ralf Baechle2007-02-061-2/+0
| | | | | | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | [MIPS] Alchemy: Fix PCI-memory accessAlexander Bigga2007-02-061-6/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The problem was introduced in 2.6.18.3 with the casting of some 36bit-defines (PCI memory) in au1000.h to resource_size_t which may be u32 or u64 depending on the experimental CONFIG_RESOURCES_64BIT. With unset CONFIG_RESOURCES_64BIT, the pci-memory cannot be accessed because the ioremap in arch/mips/au1000/common/pci.c already used the truncated addresses. With set CONFIG_RESOURCES_64BIT, things get even worse, because PCI-scan aborts, due to resource conflict: request_resource() in arch/mips/pci/pci.c fails because the maximum iomem-address is 0xffffffff (32bit) but the pci-memory-start-address is 0x440000000 (36bit). To get pci working again, I propose the following patch: 1. remove the resource_size_t-casting from au1000.h again 2. make the casting in arch/mips/au1000/common/pci.c (it's allowed and necessary here. The 36bit-handling will be done in __fixup_bigphys_addr). With this patch pci works again like in 2.6.18.2, the gcc-compile warnings in pci.c are gone and it doesn't depend on CONFIG_EXPERIMENTAL. Signed-off-by: Alexander Bigga <ab@mycable.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | [MIPS] SMTC: Make a bunch of functions and variables static.Ralf Baechle2007-02-061-3/+0
| | | | | | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | [MIPS] Alchemy: Fix bunch of warningsRalf Baechle2007-02-061-6/+7
| | | | | | | | | | | | | | | | | | | | | | | | CC arch/mips/au1000/common/pci.o arch/mips/au1000/common/pci.c:42: warning: large integer implicitly truncated to unsigned type arch/mips/au1000/common/pci.c:43: warning: large integer implicitly truncated to unsigned type arch/mips/au1000/common/pci.c:49: warning: large integer implicitly truncated to unsigned type arch/mips/au1000/common/pci.c:50: warning: large integer implicitly truncated to unsigned type arch/mips/au1000/common/pci.c: In function ‘au1x_pci_setup’: arch/mips/au1000/common/pci.c:82: warning: ISO C90 forbids mixed declarations and code Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | [MIPS] Remove _fdata from asm-mips/sections.hAtsushi Nemoto2007-02-061-2/+0
| | | | | | | | | | | | | | There is no _fdata symbol in kernel. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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