aboutsummaryrefslogtreecommitdiffstats
path: root/arch/s390
Commit message (Collapse)AuthorAge
* freezer: remove now unused TIF_FREEZETejun Heo2011-11-21
| | | | | | Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: linux-arch@vger.kernel.org
* Merge branch 'kvm-updates/3.2' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds2011-11-20
|\ | | | | | | | | | | | | | | | | | | | | | | | | * 'kvm-updates/3.2' of git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM guest: prevent tracing recursion with kvmclock Revert "KVM: PPC: Add support for explicit HIOR setting" KVM: VMX: Check for automatic switch msr table overflow KVM: VMX: Add support for guest/host-only profiling KVM: VMX: add support for switching of PERF_GLOBAL_CTRL KVM: s390: announce SYNC_MMU KVM: s390: Fix tprot locking KVM: s390: handle SIGP sense running intercepts KVM: s390: Fix RUNNING flag misinterpretation
| * KVM: s390: announce SYNC_MMUChristian Borntraeger2011-11-17
| | | | | | | | | | | | | | | | | | | | | | KVM on s390 always had a sync mmu. Any mapping change in userspace mapping was always reflected immediately in the guest mapping. - In older code the guest mapping was just an offset - In newer code the last level page table is shared Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Carsten Otte <cotte@de.ibm.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: s390: Fix tprot lockingChristian Borntraeger2011-11-17
| | | | | | | | | | | | | | | | | | | | | | | | There is a potential host deadlock in the tprot intercept handling. We must not hold the mmap semaphore while resolving the guest address. If userspace is remapping, then the memory detection in the guest is broken anyway so we can safely separate the address translation from walking the vmas. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Carsten Otte <cotte@de.ibm.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: s390: handle SIGP sense running interceptsCornelia Huck2011-11-17
| | | | | | | | | | | | | | | | | | SIGP sense running may cause an intercept on higher level virtualization, so handle it by checking the CPUSTAT_RUNNING flag. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Carsten Otte <cotte@de.ibm.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: s390: Fix RUNNING flag misinterpretationCornelia Huck2011-11-17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | CPUSTAT_RUNNING was implemented signifying that a vcpu is not stopped. This is not, however, what the architecture says: RUNNING should be set when the host is acting on the behalf of the guest operating system. CPUSTAT_RUNNING has been changed to be set in kvm_arch_vcpu_load() and to be unset in kvm_arch_vcpu_put(). For signifying stopped state of a vcpu, a host-controlled bit has been used and is set/unset basically on the reverse as the old CPUSTAT_RUNNING bit (including pushing it down into stop handling proper in handle_stop()). Cc: stable@kernel.org Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Carsten Otte <cotte@de.ibm.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* | [S390] topology: fix topology on z10 machinesHeiko Carstens2011-11-14
| | | | | | | | | | | | | | | | | | Make sure that all cpus in a book on a z10 appear as book siblings and not as core siblings. This fixes some performance regressions that appeared after the book scheduling domain got introduced. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | [S390] crypto: avoid MSA3 and MSA4 instructions in ESA modeJan Glauber2011-11-14
| | | | | | | | | | | | | | | | | | MSA3 and MSA4 instructions are only available under CONFIG_64BIT. Bail out before using any of these instructions if the kernel is running in 31 bit mode. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | [S390] avoid STCKF if running in ESA modeJan Glauber2011-11-14
| | | | | | | | | | | | | | | | | | In ESA mode STCKF is not defined even if the facility bit is enabled. To prevent an illegal operation we must also check if we run a 64 bit kernel. To make the check perform well add the STCKF bit to the machine flags. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | [S390] zfcpdump: Do not initialize zfcpdump in kdump modeMichael Holzheu2011-11-14
| | | | | | | | | | | | | | | | When the kernel is started in kdump mode, zfcpdump should not be initialized because both dump methods can't be used at the same time. Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | [S390] Kconfig: Select CONFIG_KEXEC for CONFIG_CRASH_DUMPMichael Holzheu2011-11-14
| | | | | | | | | | | | | | | | The kdump infrastructure is built on top of kexec. Therefore CONFIG_KEXEC has to be enabled when CONFIG_CRASH_DUMP is selected. Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | [S390] incorrect note program headerMartin Schwidefsky2011-11-14
| | | | | | | | | | | | | | | | | | | | | | 'readelf -n' on the s390 vmlinux file generates lots of warnings about corrupt notes. The reason is that the 'NOTE' program header has incorrect file and memory sizes. The problem is that the section following the NOTES section do not switch to a different phdr and they get added to the NOTE program section. Add a dummy entry to the linker script that switches to the data phdr before the start of the RODATA section. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | [S390] pfault: ignore leftover completion interruptsHeiko Carstens2011-11-14
| | | | | | | | | | | | | | | | | | | | | | Ignore completion interrupts if the initial interrupt hasn't been received and the addressed task is not running. This case can only happen if leftover (pending) completion interrupt gets delivered which wasn't removed with the PFAULT CANCEL operation during cpu hotplug. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | [S390] fix pgste update logicMartin Schwidefsky2011-11-14
| | | | | | | | | | | | | | | | | | The pgste_update_all / pgste_update_young and pgste_set_pte need to check if the pte entry contains a valid page address before the storage key can be accessed. In addition pgste_set_pte needs to set the access key and fetch protection bit of the new pte entry, not the old entry. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | [S390] wire up process_vm syscallsHeiko Carstens2011-11-14
|/ | | | | Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* Merge branch 'upstream/jump-label-noearly' of ↵Linus Torvalds2011-11-06
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen * 'upstream/jump-label-noearly' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen: jump-label: initialize jump-label subsystem much earlier x86/jump_label: add arch_jump_label_transform_static() s390/jump-label: add arch_jump_label_transform_static() jump_label: add arch_jump_label_transform_static() to optimise non-live code updates sparc/jump_label: drop arch_jump_label_text_poke_early() x86/jump_label: drop arch_jump_label_text_poke_early() jump_label: if a key has already been initialized, don't nop it out stop_machine: make stop_machine safe and efficient to call early jump_label: use proper atomic_t initializer Conflicts: - arch/x86/kernel/jump_label.c Added __init_or_module to arch_jump_label_text_poke_early vs removal of that function entirely - kernel/stop_machine.c same patch ("stop_machine: make stop_machine safe and efficient to call early") merged twice, with whitespace fix in one version
| * s390/jump-label: add arch_jump_label_transform_static()Jeremy Fitzhardinge2011-10-25
| | | | | | | | | | | | | | | | | | | | This allows jump-label entries to be cheaply updated on code which is not yet live. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Acked-by: Jason Baron <jbaron@redhat.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Jan Glauber <jang@linux.vnet.ibm.com>
* | Merge branch 'modsplit-Oct31_2011' of ↵Linus Torvalds2011-11-06
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux * 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux: (230 commits) Revert "tracing: Include module.h in define_trace.h" irq: don't put module.h into irq.h for tracking irqgen modules. bluetooth: macroize two small inlines to avoid module.h ip_vs.h: fix implicit use of module_get/module_put from module.h nf_conntrack.h: fix up fallout from implicit moduleparam.h presence include: replace linux/module.h with "struct module" wherever possible include: convert various register fcns to macros to avoid include chaining crypto.h: remove unused crypto_tfm_alg_modname() inline uwb.h: fix implicit use of asm/page.h for PAGE_SIZE pm_runtime.h: explicitly requires notifier.h linux/dmaengine.h: fix implicit use of bitmap.h and asm/page.h miscdevice.h: fix up implicit use of lists and types stop_machine.h: fix implicit use of smp.h for smp_processor_id of: fix implicit use of errno.h in include/linux/of.h of_platform.h: delete needless include <linux/module.h> acpi: remove module.h include from platform/aclinux.h miscdevice.h: delete unnecessary inclusion of module.h device_cgroup.h: delete needless include <linux/module.h> net: sch_generic remove redundant use of <linux/module.h> net: inet_timewait_sock doesnt need <linux/module.h> ... Fix up trivial conflicts (other header files, and removal of the ab3550 mfd driver) in - drivers/media/dvb/frontends/dibx000_common.c - drivers/media/video/{mt9m111.c,ov6650.c} - drivers/mfd/ab3550-core.c - include/linux/dmaengine.h
| * | s390: add missing module.h/export.h includesHeiko Carstens2011-10-31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix several compile errors on s390 caused by splitting module.h. Some include additions [e.g. qdio_setup.c, zfcp_qdio.c] are in anticipation of pending changes queued for s390 that increase the modular use footprint. [PG: added additional obvious changes since Heiko's original patch] Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
* | | Merge branch 'akpm' (Andrew's incoming - part two)Linus Torvalds2011-11-02
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Says Andrew: "60 patches. That's good enough for -rc1 I guess. I have quite a lot of detritus to be rechecked, work through maintainers, etc. - most of the remains of MM - rtc - various misc - cgroups - memcg - cpusets - procfs - ipc - rapidio - sysctl - pps - w1 - drivers/misc - aio" * akpm: (60 commits) memcg: replace ss->id_lock with a rwlock aio: allocate kiocbs in batches drivers/misc/vmw_balloon.c: fix typo in code comment drivers/misc/vmw_balloon.c: determine page allocation flag can_sleep outside loop w1: disable irqs in critical section drivers/w1/w1_int.c: multiple masters used same init_name drivers/power/ds2780_battery.c: fix deadlock upon insertion and removal drivers/power/ds2780_battery.c: add a nolock function to w1 interface drivers/power/ds2780_battery.c: create central point for calling w1 interface w1: ds2760 and ds2780, use ida for id and ida_simple_get() to get it pps gpio client: add missing dependency pps: new client driver using GPIO pps: default echo function include/linux/dma-mapping.h: add dma_zalloc_coherent() sysctl: make CONFIG_SYSCTL_SYSCALL default to n sysctl: add support for poll() RapidIO: documentation update drivers/net/rionet.c: fix ethernet address macros for LE platforms RapidIO: fix potential null deref in rio_setup_device() RapidIO: add mport driver for Tsi721 bridge ...
| * | | thp: share get_huge_page_tail()Andrea Arcangeli2011-11-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This avoids duplicating the function in every arch gup_fast. Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Hugh Dickins <hughd@google.com> Cc: Johannes Weiner <jweiner@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: Mel Gorman <mgorman@suse.de> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: David Gibson <david@gibson.dropbear.id.au> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: David Miller <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * | | s390: gup_huge_pmd() return 0 if pte changesAndrea Arcangeli2011-11-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | s390 didn't return 0 in that case, if it's rolling back the *nr pointer it should also return zero to avoid adding pages to the array at the wrong offset. Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Hugh Dickins <hughd@google.com> Cc: Johannes Weiner <jweiner@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: Mel Gorman <mgorman@suse.de> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: David Gibson <david@gibson.dropbear.id.au> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: David Miller <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * | | s390: gup_huge_pmd() support THP tail recountingAndrea Arcangeli2011-11-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Up to this point the code assumed old refcounting for hugepages (pre-thp). This updates the code directly to the thp mapcount tail page refcounting. Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Hugh Dickins <hughd@google.com> Cc: Johannes Weiner <jweiner@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: Mel Gorman <mgorman@suse.de> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: David Gibson <david@gibson.dropbear.id.au> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: David Miller <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | filesystems: add set_nlink()Miklos Szeredi2011-11-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Replace remaining direct i_nlink updates with a new set_nlink() updater function. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Tested-by: Toshiyuki Okajima <toshi.okajima@jp.fujitsu.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
* | | | filesystems: add missing nlink wrappersMiklos Szeredi2011-11-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Replace direct i_nlink updates with the respective updater function (inc_nlink, drop_nlink, clear_nlink, inode_dec_link_count). Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
* | | | hypfs: remove unnecessary nlink settingMiklos Szeredi2011-11-02
|/ / / | | | | | | | | | | | | | | | | | | | | | | | | alloc_inode() initializes i_nlink to 1. Remove unnecessary re-initialization. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> CC: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
* | | Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6Linus Torvalds2011-10-31
|\ \ \ | |/ / |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6: (54 commits) [S390] Remove error checking from copy_oldmem_page() [S390] qdio: prevent dsci access without adapter interrupts [S390] irqstats: split IPI interrupt accounting [S390] add missing __tlb_flush_global() for !CONFIG_SMP [S390] sparse: fix sparse symbol shadow warning [S390] sparse: fix sparse NULL pointer warnings [S390] sparse: fix sparse warnings with __user pointers [S390] sparse: fix sparse warnings in math-emu [S390] sparse: fix sparse warnings about missing prototypes [S390] sparse: fix sparse ANSI-C warnings [S390] sparse: fix sparse static warnings [S390] sparse: fix access past end of array warnings [S390] dasd: prevent path verification before resume [S390] qdio: remove multicast polling [S390] qdio: reset outbound SBAL error states [S390] qdio: EQBS retry after CCQ 96 [S390] qdio: add timestamp for last queue scan time [S390] Introduce get_clock_fast() [S390] kvm: Handle diagnose 0x10 (release pages) [S390] take mmap_sem when walking guest page table ...
| * | [S390] Remove error checking from copy_oldmem_page()Michael Holzheu2011-10-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently it can happen that the pre-allocated ELF header contains a wrong memory map which would result in errors when copying /proc/vmcore. In order to still get a valid vmcore, we (temporarily) disable the error checking in copy_oldmem_page(). This will then produce zero pages for those memory regions. Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] irqstats: split IPI interrupt accountingHeiko Carstens2011-10-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | We use both the external call and emergency call IPIs to signal remote cpus. Therefore it makes sense to account them differently withing /proc/irqstats so we actually know what happened. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] add missing __tlb_flush_global() for !CONFIG_SMPJan Glauber2011-10-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix this compiler error for !CONFIG_SMP: CC arch/s390/mm/pgtable.o arch/s390/mm/pgtable.c: In function ‘gmap_flush_tlb’: arch/s390/mm/pgtable.c:202:3: error: implicit declaration of function ‘__tlb_flush_global’ [-Werror=implicit-function-declaration] cc1: some warnings being treated as errors Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] sparse: fix sparse warnings with __user pointersMartin Schwidefsky2011-10-30
| | | | | | | | | | | | | | | | | | Use __force to quiet sparse warnings about user address space. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] sparse: fix sparse warnings in math-emuMartin Schwidefsky2011-10-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix three sparse warnings in math-emu / sysinfo: arch/s390/kernel/sysinfo.c:448:17: error: return expression in void function arch/s390/kernel/sysinfo.c:445:25: warning: shift too big (32) for type unsigned int arch/s390/kernel/sysinfo.c:445:25: warning: shift too big (32) for type unsigned int Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] sparse: fix sparse warnings about missing prototypesMartin Schwidefsky2011-10-30
| | | | | | | | | | | | | | | | | | Add prototypes and includes for functions used in different modules. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] sparse: fix sparse ANSI-C warningsMartin Schwidefsky2011-10-30
| | | | | | | | | | | | | | | | | | | | | Fix prototype of some functions in arch/s390/oprofile to avoid non-ANSI warnings from sparse. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] sparse: fix sparse static warningsMartin Schwidefsky2011-10-30
| | | | | | | | | | | | | | | | | | Make functions and data static to avoid sparse warnings. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] sparse: fix access past end of array warningsMartin Schwidefsky2011-10-30
| | | | | | | | | | | | | | | | | | | | | | | | Remove unnecessary code to avoid false positives from sparse, e.g. arch/s390/kernel/compat_signal.c:221:61: warning: invalid access past the end of 'set32' (8 8) Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] Introduce get_clock_fast()Jan Glauber2011-10-30
| | | | | | | | | | | | | | | | | | | | | | | | Add get_clock_fast() which uses the slightly faster stckf if available. If stckf is not available fall back to stck, which has the same width. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] kvm: Handle diagnose 0x10 (release pages)Christian Borntraeger2011-10-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | Linux on System z uses a ballooner based on diagnose 0x10. (aka as collaborative memory management). This patch implements diagnose 0x10 on the guest address space. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] take mmap_sem when walking guest page tableCarsten Otte2011-10-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | gmap_fault needs to walk the guest page table. However, parts of that may change if some other thread does munmap. In that case gmap_unmap_notifier will also unmap the corresponding parts from the guest page table. We need to take mmap_sem in order to serialize these operations. do_exception now calls __gmap_fault with mmap_sem held which does not get exported to modules. The exported function, which is called from KVM, now takes mmap_sem. Reported-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Carsten Otte <cotte@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] fix list corruption in gmap reverse mappingCarsten Otte2011-10-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | This introduces locking via mm->page_table_lock to protect the rmap list for guest mappings from being corrupted by concurrent operations. Signed-off-by: Carsten Otte <cotte@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] fix possible deadlock in gmap_map_segmentCarsten Otte2011-10-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix possible deadlock reported by lockdep: qemu-system-s39/2963 is trying to acquire lock: (&mm->mmap_sem){++++++}, at: gmap_alloc_table+0x9c/0x120 but task is already holding lock: (&mm->mmap_sem){++++++}, at: gmap_map_segment+0xa6/0x27c Actually gmap_alloc_table is the only called in gmap_map_segment with mmap_sem held, thus it's safe to simply remove the inner lock. Signed-off-by: Carsten Otte <cotte@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] load user asce on sie_faultCarsten Otte2011-10-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | On sie_fault we need to switch back to user ASCE. Otherwise we get interresting effects when exiting to "userspace" while the guest space is still active. Signed-off-by: Carsten Otte <cotte@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] smp: external call vs. emergency signalMartin Schwidefsky2011-10-30
| | | | | | | | | | | | | | | | | | | | | | | | Use a sigp sense running to decide which signal processor order to use for an ipi. If the target cpu is running use external call, if the target cpu is not running use emergency signal. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] chsc_sch: add support for irq statisticsSebastian Ott2011-10-30
| | | | | | | | | | | | | | | | | | | | | Add support for CHSC I/O interrupt statistics in /proc/interrupts. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] allow all addressing modesMartin Schwidefsky2011-10-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The user space program can change its addressing mode between the 24-bit, 31-bit and the 64-bit mode if the kernel is 64 bit. Currently the kernel always forces the standard amode on signal delivery and signal return and on ptrace: 64-bit for a 64-bit process, 31-bit for a compat process and 31-bit kernels. Change the signal and ptrace code to allow the full range of addressing modes. Signal handlers are run in the standard addressing mode for the process. One caveat is that even an 31-bit compat process can switch to the 64-bit mode. The next signal will switch back into the 31-bit mode and there is no room in the 31-bit compat signal frame to store the information that the program came from the 64-bit mode. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] cleanup psw related bits and piecesMartin Schwidefsky2011-10-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Split out addressing mode bits from PSW_BASE_BITS, rename PSW_BASE_BITS to PSW_MASK_BASE, get rid of psw_user32_bits, remove unused function enabled_wait(), introduce PSW_MASK_USER, and drop PSW_MASK_MERGE macros. Change psw_kernel_bits / psw_user_bits to contain only the bits that are always set in the respective mode. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] add TIF_SYSCALL thread flagMartin Schwidefsky2011-10-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add an explicit TIF_SYSCALL bit that indicates if a task is inside a system call. The svc_code in the pt_regs structure is now only valid if TIF_SYSCALL is set. With this definition TIF_RESTART_SVC can be replaced with TIF_SYSCALL. Overall do_signal is a bit more readable and it saves a few lines of code. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] addressing mode limits and psw address wrappingMartin Schwidefsky2011-10-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | An instruction with an address right below the adress limit for the current addressing mode will wrap. The instruction restart logic in the protection fault handler and the signal code need to follow the wrapping rules to find the correct instruction address. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] signal race with restarting system callsMartin Schwidefsky2011-10-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For a ERESTARTNOHAND/ERESTARTSYS/ERESTARTNOINTR restarting system call do_signal will prepare the restart of the system call with a rewind of the PSW before calling get_signal_to_deliver (where the debugger might take control). For A ERESTART_RESTARTBLOCK restarting system call do_signal will set -EINTR as return code. There are two issues with this approach: 1) strace never sees ERESTARTNOHAND, ERESTARTSYS, ERESTARTNOINTR or ERESTART_RESTARTBLOCK as the rewinding already took place or the return code has been changed to -EINTR 2) if get_signal_to_deliver does not return with a signal to deliver the restart via the repeat of the svc instruction is left in place. This opens a race if another signal is made pending before the system call instruction can be reexecuted. The original system call will be restarted even if the second signal would have ended the system call with -EINTR. These two issues can be solved by dropping the early rewind of the system call before get_signal_to_deliver has been called and by using the TIF_RESTART_SVC magic to do the restart if no signal has to be delivered. The only situation where the system call restart via the repeat of the svc instruction is appropriate is when a SA_RESTART signal is delivered to user space. Unfortunately this breaks inferior calls by the debugger again. The system call number and the length of the system call instruction is lost over the inferior call and user space will see ERESTARTNOHAND/ ERESTARTSYS/ERESTARTNOINTR/ERESTART_RESTARTBLOCK. To correct this a new ptrace interface is added to save/restore the system call number and system call instruction length. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] defconfig: switch on CONFIG_DEVTMPFSHendrik Brueckner2011-10-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | Switching on the DEVTMPFS kernel option helpes to maintain a /dev file system early in the boot process, especially, in limited environments. Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-27 05:22:55 -0500