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| * | | | consolidate kernel-side struct sigaction declarationsAl Viro2013-02-03
| | | | | | | | | | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * | | | consolidate declarations of k_sigactionAl Viro2013-02-03
| | |/ / | |/| | | | | | | | | | | | | | | | | | | | | | Only alpha and sparc are unusual - they have ka_restorer in it. And nobody needs that exposed to userland. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | | Merge branch 'for-linus' of ↵Linus Torvalds2013-02-21
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull s390 update from Martin Schwidefsky: "The most prominent change in this patch set is the software dirty bit patch for s390. It removes __HAVE_ARCH_PAGE_TEST_AND_CLEAR_DIRTY and the page_test_and_clear_dirty primitive which makes the common memory management code a bit less obscure. Heiko fixed most of the PCI related fallout, more often than not missing GENERIC_HARDIRQS dependencies. Notable is one of the 3270 patches which adds an export to tty_io to be able to resize a tty. The rest is the usual bunch of cleanups and bug fixes." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (42 commits) s390/module: Add missing R_390_NONE relocation type drivers/gpio: add missing GENERIC_HARDIRQ dependency drivers/input: add couple of missing GENERIC_HARDIRQS dependencies s390/cleanup: rename SPP to LPP s390/mm: implement software dirty bits s390/mm: Fix crst upgrade of mmap with MAP_FIXED s390/linker skript: discard exit.data at runtime drivers/media: add missing GENERIC_HARDIRQS dependency s390/bpf,jit: add vlan tag support drivers/net,AT91RM9200: add missing GENERIC_HARDIRQS dependency iucv: fix kernel panic at reboot s390/Kconfig: sort list of arch selected config options phylib: remove !S390 dependeny from Kconfig uio: remove !S390 dependency from Kconfig dasd: fix sysfs cleanup in dasd_generic_remove s390/pci: fix hotplug module init s390/pci: cleanup clp page allocation s390/pci: cleanup clp inline assembly s390/perf: cpum_cf: fallback to software sampling events s390/mm: provide PAGE_SHARED define ...
| * | | | s390/cleanup: rename SPP to LPPHendrik Brueckner2013-02-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The set-program-parameter (SPP) instruction has been renamed to load-program-parameter (LPP) (see SA23-2260). Reflect this change and rename all macro/instruction references. Also remove the duplicate SPP/LPP entry in the kernel disassembler instruction list. Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | s390/mm: implement software dirty bitsMartin Schwidefsky2013-02-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The s390 architecture is unique in respect to dirty page detection, it uses the change bit in the per-page storage key to track page modifications. All other architectures track dirty bits by means of page table entries. This property of s390 has caused numerous problems in the past, e.g. see git commit ef5d437f71afdf4a "mm: fix XFS oops due to dirty pages without buffers on s390". To avoid future issues in regard to per-page dirty bits convert s390 to a fault based software dirty bit detection mechanism. All user page table entries which are marked as clean will be hardware read-only, even if the pte is supposed to be writable. A write by the user process will trigger a protection fault which will cause the user pte to be marked as dirty and the hardware read-only bit is removed. With this change the dirty bit in the storage key is irrelevant for Linux as a host, but the storage key is still required for KVM guests. The effect is that page_test_and_clear_dirty and the related code can be removed. The referenced bit in the storage key is still used by the page_test_and_clear_young primitive to provide page age information. For page cache pages of mappings with mapping_cap_account_dirty there will not be any change in behavior as the dirty bit tracking already uses read-only ptes to control the amount of dirty pages. Only for swap cache pages and pages of mappings without mapping_cap_account_dirty there can be additional protection faults. To avoid an excessive number of additional faults the mk_pte primitive checks for PageDirty if the pgprot value allows for writes and pre-dirties the pte. That avoids all additional faults for tmpfs and shmem pages until these pages are added to the swap cache. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | s390/mm: Fix crst upgrade of mmap with MAP_FIXEDHendrik Brueckner2013-02-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Right now the page table upgrade does not happen if the end address of a fixed mapping is greater than TASK_SIZE. Enhance s390_mmap_check() to handle MAP_FIXED mappings correctly. Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | s390/pci: fix hotplug module initSebastian Ott2013-02-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Loading the pci hotplug module when no devices are present will fail but unfortunately some hotplug callbacks stay registered to the pci bus level. Fix this by not letting module loading fail when no pci devices are present and provide proper {de}registration functions for these callbacks. Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | s390/pci: cleanup clp page allocationSebastian Ott2013-02-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use the __get_free_pages wrapper in clp_alloc_block. Also change the allocation to use one page only. This page is used as CLP response block e.g. to list available pci functions. Using one page we can list > 250 pci functions at once and we have code to loop around this CLP command (if not all functions fit into to the CLP block) already in place. Acked-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | s390/mm: provide PAGE_SHARED defineHeiko Carstens2013-02-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Only needed to make some drivers compile... Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | s390/pci: rename pci_probe to s390_pci_probeHeiko Carstens2013-02-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | pci_probe is too generic and has a name clash with other common code parts. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | s390/dma: remove dma_is_consistent() declarationHeiko Carstens2013-02-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There is no such function nor any caller in the whole kernel. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | s390/dma: provide dma_cache_sync() functionHeiko Carstens2013-02-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Provide empty dma_cache_sync() function. Acked-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | s390/barrier: convert mb() to define againHeiko Carstens2013-02-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some of the now available common code drivers only compile if mb() is a define. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | s390/time: rename tod clock access functionsHeiko Carstens2013-02-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix name clash with some common code device drivers and add "tod" to all tod clock access function names. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | s390/chsc: cleanup SEI helper functionsSebastian Ott2013-02-14
| | |_|/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Cleanup the functions used to call SEI. Also provide !CONFIG_PCI dummys for pci error handling. Reviewed-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller2013-02-08
|\| | | | | | | | | | | | | | | | | | | | | | | | | | | Synchronize with 'net' in order to sort out some l2tp, wireless, and ipv6 GRE fixes that will be built on top of in 'net-next'. Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | s390/thp: implement pmdp_set_wrprotect()Gerald Schaefer2013-01-22
| |/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On s390, an architecture-specific implementation of the function pmdp_set_wrprotect() is missing and the generic version is currently being used. The generic version does not flush the tlb as it would be needed on s390 when modifying an active pmd, which can lead to subtle tlb errors on s390 when using transparent hugepages. This patch adds an s390-specific implementation of pmdp_set_wrprotect() including the missing tlb flush. Cc: stable@vger.kernel.org Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller2013-01-29
|\| | | | | | | | | | | | | | | | | | | | Bring in the 'net' tree so that we can get some ipv4/ipv6 bug fixes that some net-next work will build upon. Signed-off-by: David S. Miller <davem@davemloft.net>
| * | s390/time: fix sched_clock() overflowHeiko Carstens2013-01-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Converting a 64 Bit TOD format value to nanoseconds means that the value must be divided by 4.096. In order to achieve that we multiply with 125 and divide by 512. When used within sched_clock() this triggers an overflow after appr. 417 days. Resulting in a sched_clock() return value that is much smaller than previously and therefore may cause all sort of weird things in subsystems that rely on a monotonic sched_clock() behaviour. To fix this implement a tod_to_ns() helper function which converts TOD values without overflow and call this function from both places that open coded the conversion: sched_clock() and kvm_s390_handle_wait(). Cc: stable@kernel.org Reviewed-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | s390/mm: fix pmd_pfn() for thpGerald Schaefer2013-01-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The pfn calculation in pmd_pfn() is broken for thp, because it uses HPAGE_SHIFT instead of the normal PAGE_SHIFT. This is fixed by removing the distinction between thp and normal pmds in that function, and always using PAGE_SHIFT. Reported-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | | soreuseport: infrastructureTom Herbert2013-01-23
| | | | | | | | | | | | | | | | | | | | | Definitions and macros for implementing soreusport. Signed-off-by: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | sk-filter: Add ability to lock a socket filter programVincent Bernat2013-01-17
|/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | While a privileged program can open a raw socket, attach some restrictive filter and drop its privileges (or send the socket to an unprivileged program through some Unix socket), the filter can still be removed or modified by the unprivileged program. This commit adds a socket option to lock the filter (SO_LOCK_FILTER) preventing any modification of a socket filter program. This is similar to OpenBSD BIOCLOCK ioctl on bpf sockets, except even root is not allowed change/drop the filter. The state of the lock can be read with getsockopt(). No error is triggered if the state is not changed. -EPERM is returned when a user tries to remove the lock or to change/remove the filter while the lock is active. The check is done directly in sk_attach_filter() and sk_detach_filter() and does not affect only setsockopt() syscall. Signed-off-by: Vincent Bernat <bernat@luffy.cx> Signed-off-by: David S. Miller <davem@davemloft.net>
* | s390/pci: define read*_relaxed functionsHeiko Carstens2013-01-08
| | | | | | | | | | | | | | Just map the read*_relaxed() functions to their corresponding read*() functions. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | s390/pci: define isa_dma_bridge_buggyHeiko Carstens2013-01-08
| | | | | | | | | | | | | | | | | | | | Define isa_dma_bridge_buggy. Needed to make pci quirks compile: drivers/pci/quirks.c: In function ‘quirk_isa_dma_hangs’: drivers/pci/quirks.c:88:7: error: ‘isa_dma_bridge_buggy’ undeclared (first use in this function) Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | s390/irq: count cpu restart eventsHeiko Carstens2013-01-08
| | | | | | | | | | | | | | | | Count CPU Restart events and make them visible via /proc/interrupts. Every CPU hotplug (online) event will increase the per cpu counter. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | s390/irq: remove split irq fields from /proc/statHeiko Carstens2013-01-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that irq sum accounting for /proc/stat's "intr" line works again we have the oddity that the sum field (first field) contains only the sum of the second (external irqs) and third field (I/O interrupts). The reason for that is that these two fields are already sums of all other fields. So if we would sum up everything we would count every interrupt twice. This is broken since the split interrupt accounting was merged two years ago: 052ff461c8427629aee887ccc27478fc7373237c "[S390] irq: have detailed statistics for interrupt types". To fix this remove the split interrupt fields from /proc/stat's "intr" line again and only have them in /proc/interrupts. This restores the old behaviour, seems to be the only sane fix and mimics a behaviour from other architectures where /proc/interrupts also contains more than /proc/stat's "intr" line does. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | s390/syscalls: wire up finit_module syscallHeiko Carstens2013-01-08
| | | | | | | | Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* | Merge branch 'for-linus' of ↵Linus Torvalds2012-12-20
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal Pull signal handling cleanups from Al Viro: "sigaltstack infrastructure + conversion for x86, alpha and um, COMPAT_SYSCALL_DEFINE infrastructure. Note that there are several conflicts between "unify SS_ONSTACK/SS_DISABLE definitions" and UAPI patches in mainline; resolution is trivial - just remove definitions of SS_ONSTACK and SS_DISABLED from arch/*/uapi/asm/signal.h; they are all identical and include/uapi/linux/signal.h contains the unified variant." Fixed up conflicts as per Al. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal: alpha: switch to generic sigaltstack new helpers: __save_altstack/__compat_save_altstack, switch x86 and um to those generic compat_sys_sigaltstack() introduce generic sys_sigaltstack(), switch x86 and um to it new helper: compat_user_stack_pointer() new helper: restore_altstack() unify SS_ONSTACK/SS_DISABLE definitions new helper: current_user_stack_pointer() missing user_stack_pointer() instances Bury the conditionals from kernel_thread/kernel_execve series COMPAT_SYSCALL_DEFINE: infrastructure
| * | unify SS_ONSTACK/SS_DISABLE definitionsAl Viro2012-12-19
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * | Bury the conditionals from kernel_thread/kernel_execve seriesAl Viro2012-12-19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | All architectures have CONFIG_GENERIC_KERNEL_THREAD CONFIG_GENERIC_KERNEL_EXECVE __ARCH_WANT_SYS_EXECVE None of them have __ARCH_WANT_KERNEL_EXECVE and there are only two callers of kernel_execve() (which is a trivial wrapper for do_execve() now) left. Kill the conditionals and make both callers use do_execve(). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * | COMPAT_SYSCALL_DEFINE: infrastructureAl Viro2012-12-19
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | s390/ccwdev: Include asm/schid.h.Cornelia Huck2012-12-17
| | | | | | | | | | | | | | | | | | | | | Get the definition of struct subchannel_id. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | | s390/pci: performance statistics and debug infrastructureJan Glauber2012-12-14
| |/ |/| | | | | | | | | | | | | | | Add support for reading the PCI function measurement block counters provided by the hypervisor. Add two s390 debug features, one for critical errors and one for tracing and provide wrappers to log data. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | Merge branch 'for-linus' of ↵Linus Torvalds2012-12-13
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull s390 update from Martin Schwidefsky: "Add support to generate code for the latest machine zEC12, MOD and XOR instruction support for the BPF jit compiler, the dasd safe offline feature and the big one: the s390 architecture gets PCI support!! Right before the world ends on the 21st ;-)" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (41 commits) s390/qdio: rename the misleading PCI flag of qdio devices s390/pci: remove obsolete email addresses s390/pci: speed up __iowrite64_copy by using pci store block insn s390/pci: enable NEED_DMA_MAP_STATE s390/pci: no msleep in potential IRQ context s390/pci: fix potential NULL pointer dereference in dma_free_seg_table() s390/pci: use kmem_cache_zalloc instead of kmem_cache_alloc/memset s390/bpf,jit: add support for XOR instruction s390/bpf,jit: add support MOD instruction s390/cio: fix pgid reserved check vga: compile fix, disable vga for s390 s390/pci: add PCI Kconfig options s390/pci: s390 specific PCI sysfs attributes s390/pci: PCI hotplug support via SCLP s390/pci: CHSC PCI support for error and availability events s390/pci: DMA support s390/pci: PCI adapter interrupts for MSI/MSI-X s390/bitops: find leftmost bit instruction support s390/pci: CLP interface s390/pci: base support ...
| * | s390/pci: no msleep in potential IRQ contextJan Glauber2012-12-05
| | | | | | | | | | | | | | | | | | | | | | | | The PCI instructions may be used in IRQ context so scheduling is forbidden. Use udelay and shorten the delay since we are now polling. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | vga: compile fix, disable vga for s390Jan Glauber2012-11-30
| | | | | | | | | | | | | | | Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | s390/pci: s390 specific PCI sysfs attributesJan Glauber2012-11-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add some s390 specific sysfs attributes to the PCI device directory. The following attributes are introduced: - function_id (PCI function ID) - function_handle (PCI function handle) - pchid (PCI channel ID) - pfgid (PCI function group ID aka PCI root complex) Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | s390/pci: PCI hotplug support via SCLPJan Glauber2012-11-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add SCLP PCI configure/deconfigure and implement a PCI hotplug controller (s390_pci_hpc). The hotplug controller creates a slot for every PCI function in stand-by or configured state. The PCI functions are named after the PCI function ID (fid). By writing to the power attribute in /sys/bus/pci/slots/<fid>/power the PCI function is moved to stand-by or configured state. If moved to the configured state the device is automatically scanned by the s390 PCI layer. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | s390/pci: CHSC PCI support for error and availability eventsJan Glauber2012-11-30
| | | | | | | | | | | | | | | | | | | | | | | | Add CHSC store-event-information support for PCI (notfication type 2) and report error and availability events to the PCI architecture layer. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | s390/pci: DMA supportJan Glauber2012-11-30
| | | | | | | | | | | | | | | | | | | | | Add DMA IOMMU support using 4K page table entries. Implement dma_map_ops. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | s390/pci: PCI adapter interrupts for MSI/MSI-XJan Glauber2012-11-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Support PCI adapter interrupts using the Single-IRQ-mode. Single-IRQ-mode disables an adapter IRQ automatically after delivering it until the SIC instruction enables it again. This is used to reduce the number of IRQs for streaming workloads. Up to 64 MSI handlers can be registered per PCI function. A hash table is used to map interrupt numbers to MSI descriptors. The interrupt vector is scanned using the flogr instruction. Only MSI/MSI-X interrupts are supported, no legacy INTs. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | s390/bitops: find leftmost bit instruction supportJan Glauber2012-11-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The flogr instruction scans a bitmap starting from the leftmost bit. Implement support for these bitops. This could be useful to scan bitmaps like an interrupt vector set by the hardware starting at the leftmost bit. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | s390/pci: CLP interfaceJan Glauber2012-11-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | CLP instructions are used to query the firmware about detected PCI functions, the attributes of those functions and to enable or disable a PCI function. The CLP interface is the equivalent to a PCI bus scan. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | s390/pci: base supportJan Glauber2012-11-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add PCI support for s390, (only 64 bit mode is supported by hardware): - PCI facility tests - PCI instructions: pcilg, pcistg, pcistb, stpcifc, mpcifc, rpcit - map readb/w/l/q and writeb/w/l/q to pcilg and pcistg instructions - pci_iomap implementation - memcpy_fromio/toio - pci_root_ops using special pcilg/pcistg - device, bus and domain allocation Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | s390/ccwgroup: allow drivers to call set_{on,off}lineSebastian Ott2012-11-23
| | | | | | | | | | | | | | | | | | | | | | | | Allow drivers to enable/disable ccwgroup devices. Acked-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | s390/topology: cleanup topology codeHeiko Carstens2012-11-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Mainly merge all different per-cpu arrays into a single array which holds all topology information per logical cpu. Also fix the broken core vs socket variable naming and simplify the locking a bit. When running in environments without topology information also invent book, socket and core ids, so that not all ids are zero. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | s390/memory hotplug: use pfmf instruction to initialize storage keysHeiko Carstens2012-11-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | Move and rename init_storage_keys() to pageattr.c, so it can also be used from the sclp memory hotplug code in order to initialize storage keys. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | s390/mm: keep fault_init() private to fault.cHeiko Carstens2012-11-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Just convert fault_init() to an early initcall. That's still early enough since it only needs be called before user space processes get executed. No reason to externalize it. Also add the function to the init section and move the store_indication variable to the read_mostly section. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | s390: use ccw_device_get_schidSebastian Ott2012-11-23
| | | | | | | | | | | | | | | | | | | | | | | | Let the dasd driver and qdio use ccw_device_get_schid and get rid of other similar functions. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | s390: Add a mechanism to get the subchannel id.Cornelia Huck2012-11-23
| | | | | | | | | | | | | | | | | | | | | This will be needed by the new virtio-ccw transport. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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