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2012-11-06s390/sclp: fix addressing mode clobberHeiko Carstens1-1/+7
The early mini sclp driver may be called in zArch mode either in 31 or 64 bit addressing mode. If called in 31 bit addressing mode the new external interrupt psw however would switch to 64 bit addressing mode. This would cause an addressing exception within the interrupt handler, since the code didn't expect the zArch/31 bit addressing mode combination. Fix this by setting the new psw addressing mode bits so they fit the current addressing mode. Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-10-29vtime: Make vtime_account_system() irqsafeFrederic Weisbecker1-0/+4
vtime_account_system() currently has only one caller with vtime_account() which is irq safe. Now we are going to call it from other places like kvm where irqs are not always disabled by the time we account the cputime. So let's make it irqsafe. The arch implementation part is now prefixed with "__". vtime_account_idle() arch implementation is prefixed accordingly to stay consistent. Signed-off-by: Frederic Weisbecker <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Paul Gortmaker <[email protected]> Cc: Tony Luck <[email protected]> Cc: Fenghua Yu <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Martin Schwidefsky <[email protected]> Cc: Heiko Carstens <[email protected]>
2012-10-29s390: switch to saner kernel_execve() semanticsAl Viro2-48/+10
Acked-by: Martin Schwidefsky <[email protected]> Signed-off-by: Al Viro <[email protected]>
2012-10-18s390/cache: fix data/instruction cache outputHeiko Carstens1-3/+6
The sysfs and procfs output of the instruction and data caches were wrong: the output of the data cache provided that instruction cache values and vice versa. Fix this by using the correct type indication when issueing the ecag instruction. Reported-by: Andreas Krebbel <[email protected]> Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-10-18s390: fix linker script for 31 bit buildsHeiko Carstens1-1/+1
Because of a change in the s390 arch backend of binutils (commit 23ecd77 "Pick the default arch depending on the target size" in binutils repo) 31 bit builds will fail since the linker would now try to create 64 bit binary output. Fix this by setting OUTPUT_ARCH to s390:31-bit instead of s390. Thanks to Andreas Krebbel for figuring out the issue. Fixes this build error: LD init/built-in.o s390x-4.7.2-ld: s390:31-bit architecture of input file `arch/s390/kernel/head.o' is incompatible with s390:64-bit output Cc: Andreas Krebbel <[email protected]> Cc: [email protected] Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-10-18s390/kdump: Use 64 bit mode for 0x10000 entry pointMichael Holzheu1-8/+2
The 0x10000 entry point can be called in z/Arch architecture and 64 bit addressing mode. Therefore this patch removes the unnecessary 31 bit switch code from the kdump startup function. Signed-off-by: Michael Holzheu <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-10-18perf_cpum_cf: Add support for counters available with IBM zEC12Hendrik Brueckner1-1/+5
Increase the maximum number of available counters and check if the hardware supports the counter. Support is indicated by the version of the CPU-measurement counter facility. Signed-off-by: Hendrik Brueckner <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-10-12Merge branch 'timers-core-for-linus' of ↵Linus Torvalds1-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull timer core update from Thomas Gleixner: - Bug fixes (one for a longstanding dead loop issue) - Rework of time related vsyscalls - Alarm timer updates - Jiffies updates to remove compile time dependencies * 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: timekeeping: Cast raw_interval to u64 to avoid shift overflow timers: Fix endless looping between cascade() and internal_add_timer() time/jiffies: bring back unconditional LATCH definition time: Convert x86_64 to using new update_vsyscall time: Only do nanosecond rounding on GENERIC_TIME_VSYSCALL_OLD systems time: Introduce new GENERIC_TIME_VSYSCALL time: Convert CONFIG_GENERIC_TIME_VSYSCALL to CONFIG_GENERIC_TIME_VSYSCALL_OLD time: Move update_vsyscall definitions to timekeeper_internal.h time: Move timekeeper structure to timekeeper_internal.h for vsyscall changes jiffies: Remove compile time assumptions about CLOCK_TICK_RATE jiffies: Kill unused TICK_USEC_TO_NSEC alarmtimer: Rename alarmtimer_remove to alarmtimer_dequeue alarmtimer: Remove unused helpers & defines alarmtimer: Use hrtimer per-alarm instead of per-base alarmtimer: Implement minimum alarm interval for allowing suspend
2012-10-10Merge branch 'for-linus' of ↵Linus Torvalds7-54/+134
git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull second s390 update from Martin Schwidefsky: "The big thing in this pull request is the UAPI patch from David, and worth mentioning is the page table dumper. The rest are small improvements and bug fixes." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: s390/entry: fix svc number for TIF_SYSCALL system call restart s390/mm,vmem: fix vmem_add_mem()/vmem_remove_range() s390/vmalloc: have separate modules area s390/zcrypt: remove duplicated include from zcrypt_pcixcc.c s390/css_chars: remove superfluous ifdef s390/chsc: make headers usable s390/mm: let kernel text section always begin at 1MB s390/mm: fix mapping of read-only kernel text section s390/mm: add page table dumper s390: add support to start the kernel in 64 bit mode. s390/mm,pageattr: remove superfluous EXPORT_SYMBOLs s390/mm,pageattr: add more page table walk sanity checks s390/mm: fix pmd_huge() usage for kernel mapping s390/dcssblk: cleanup device attribute usage s390/mm: use pfmf instruction to initialize storage keys s390/facilities: cleanup PFMF and HPAGE machine facility detection UAPI: (Scripted) Disintegrate arch/s390/include/asm
2012-10-10Merge branch 'for-linus' of ↵Linus Torvalds7-166/+75
git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal Pull generic execve() changes from Al Viro: "This introduces the generic kernel_thread() and kernel_execve() functions, and switches x86, arm, alpha, um and s390 over to them." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal: (26 commits) s390: convert to generic kernel_execve() s390: switch to generic kernel_thread() s390: fold kernel_thread_helper() into ret_from_fork() s390: fold execve_tail() into start_thread(), convert to generic sys_execve() um: switch to generic kernel_thread() x86, um/x86: switch to generic sys_execve and kernel_execve x86: split ret_from_fork alpha: introduce ret_from_kernel_execve(), switch to generic kernel_execve() alpha: switch to generic kernel_thread() alpha: switch to generic sys_execve() arm: get rid of execve wrapper, switch to generic execve() implementation arm: optimized current_pt_regs() arm: introduce ret_from_kernel_execve(), switch to generic kernel_execve() arm: split ret_from_fork, simplify kernel_thread() [based on patch by rmk] generic sys_execve() generic kernel_execve() new helper: current_pt_regs() preparation for generic kernel_thread() um: kill thread->forking um: let signal_delivered() do SIGTRAP on singlestepping into handler ...
2012-10-09s390/entry: fix svc number for TIF_SYSCALL system call restartMartin Schwidefsky1-1/+1
The load of the svc number in the TIF_SYSCALL restart path needs to be done with an instruction that loads all 64 bits of %r1, 'lh' only loads 32 bits. If the upper half of %r1 is not zero and has the msb set, entry64.S will try to execute an svc with a really large number. What will be in the upper half of %r1 depends on the code generated by gcc for the functions on the do_signal() callchain. Signed-off-by: Martin Schwidefsky <[email protected]>
2012-10-09s390/vmalloc: have separate modules areaHeiko Carstens2-2/+22
Add a special module area on top of the vmalloc area, which may be only used for modules and bpf jit generated code. This makes sure that inter module branches will always happen without a trampoline and in addition having all the code within a 2GB frame is branch prediction unit friendly. Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-10-09s390/mm: let kernel text section always begin at 1MBHeiko Carstens2-6/+0
Let the kernel text section always begin at 1MB. This allows to always have a large frame in the identity mapping of the kernel image for beginning of the text section, if the machine has EDAT1 support. Moving the beginning from 64K to 1MB doesn't cost any memory, since we make the memory between 64K and 1MB available for the page allocator. Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-10-09s390: add support to start the kernel in 64 bit mode.Martin Schwidefsky1-31/+70
Do the switch to z/Architecture (alias 64 bit) mode early in head.S. If the machine is already running in 64 bit mode the sigp turns into a nop. With this change it doesn't matter in which mode the kernel is started. Reviewd-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-10-09s390/mm: use pfmf instruction to initialize storage keysHeiko Carstens2-3/+37
Make use of the pfmf instruction, if available, to initialize storage keys of whole 1MB or 2GB frames instead of initializing every single page with the sske instruction. Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-10-09s390/facilities: cleanup PFMF and HPAGE machine facility detectionHeiko Carstens1-11/+4
MACHINE_HAS_PFMF and MACHINE_HAS_HPAGE actually have the same semantics: the cpu has the EDAT1 facility installed in zArch mode. So remove one of the feature flags in machine_flags and rename the other one to EDAT1. The two old macros simply get mapped to MACHINE_HAS_EDAT1. Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-10-09thp, s390: architecture backend for thp on s390Gerald Schaefer1-0/+2
This implements the architecture backend for transparent hugepages on s390. Signed-off-by: Gerald Schaefer <[email protected]> Cc: Andrea Arcangeli <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Hugh Dickins <[email protected]> Cc: Hillf Danton <[email protected]> Cc: Martin Schwidefsky <[email protected]> Cc: Heiko Carstens <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2012-10-06compat: move compat_siginfo_t definition to asm/compat.hDenys Vlasenko1-68/+0
This is a preparatory patch for the introduction of NT_SIGINFO elf note. Make the location of compat_siginfo_t uniform across eight architectures which have it. Now it can be pulled in by including asm/compat.h or linux/compat.h. Most of the copies are verbatim. compat_uid[32]_t had to be replaced by __compat_uid[32]_t. compat_uptr_t had to be moved up before compat_siginfo_t in asm/compat.h on a several architectures (tile already had it moved up). compat_sigval_t had to be relocated from linux/compat.h to asm/compat.h. Signed-off-by: Denys Vlasenko <[email protected]> Cc: Oleg Nesterov <[email protected]> Cc: Amerigo Wang <[email protected]> Cc: "Jonathan M. Foote" <[email protected]> Cc: Roland McGrath <[email protected]> Cc: Pedro Alves <[email protected]> Cc: Fengguang Wu <[email protected]> Cc: Stephen Rothwell <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2012-10-04Merge tag 'kvm-3.7-1' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds1-0/+27
Pull KVM updates from Avi Kivity: "Highlights of the changes for this release include support for vfio level triggered interrupts, improved big real mode support on older Intels, a streamlines guest page table walker, guest APIC speedups, PIO optimizations, better overcommit handling, and read-only memory." * tag 'kvm-3.7-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (138 commits) KVM: s390: Fix vcpu_load handling in interrupt code KVM: x86: Fix guest debug across vcpu INIT reset KVM: Add resampling irqfds for level triggered interrupts KVM: optimize apic interrupt delivery KVM: MMU: Eliminate pointless temporary 'ac' KVM: MMU: Avoid access/dirty update loop if all is well KVM: MMU: Eliminate eperm temporary KVM: MMU: Optimize is_last_gpte() KVM: MMU: Simplify walk_addr_generic() loop KVM: MMU: Optimize pte permission checks KVM: MMU: Update accessed and dirty bits after guest pagetable walk KVM: MMU: Move gpte_access() out of paging_tmpl.h KVM: MMU: Optimize gpte_access() slightly KVM: MMU: Push clean gpte write protection out of gpte_access() KVM: clarify kvmclock documentation KVM: make processes waiting on vcpu mutex killable KVM: SVM: Make use of asm.h KVM: VMX: Make use of asm.h KVM: VMX: Make lto-friendly KVM: x86: lapic: Clean up find_highest_vector() and count_vectors() ... Conflicts: arch/s390/include/asm/processor.h arch/x86/kvm/i8259.c
2012-10-02Merge branch 'for-linus' of ↵Linus Torvalds1-12/+24
git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace Pull user namespace changes from Eric Biederman: "This is a mostly modest set of changes to enable basic user namespace support. This allows the code to code to compile with user namespaces enabled and removes the assumption there is only the initial user namespace. Everything is converted except for the most complex of the filesystems: autofs4, 9p, afs, ceph, cifs, coda, fuse, gfs2, ncpfs, nfs, ocfs2 and xfs as those patches need a bit more review. The strategy is to push kuid_t and kgid_t values are far down into subsystems and filesystems as reasonable. Leaving the make_kuid and from_kuid operations to happen at the edge of userspace, as the values come off the disk, and as the values come in from the network. Letting compile type incompatible compile errors (present when user namespaces are enabled) guide me to find the issues. The most tricky areas have been the places where we had an implicit union of uid and gid values and were storing them in an unsigned int. Those places were converted into explicit unions. I made certain to handle those places with simple trivial patches. Out of that work I discovered we have generic interfaces for storing quota by projid. I had never heard of the project identifiers before. Adding full user namespace support for project identifiers accounts for most of the code size growth in my git tree. Ultimately there will be work to relax privlige checks from "capable(FOO)" to "ns_capable(user_ns, FOO)" where it is safe allowing root in a user names to do those things that today we only forbid to non-root users because it will confuse suid root applications. While I was pushing kuid_t and kgid_t changes deep into the audit code I made a few other cleanups. I capitalized on the fact we process netlink messages in the context of the message sender. I removed usage of NETLINK_CRED, and started directly using current->tty. Some of these patches have also made it into maintainer trees, with no problems from identical code from different trees showing up in linux-next. After reading through all of this code I feel like I might be able to win a game of kernel trivial pursuit." Fix up some fairly trivial conflicts in netfilter uid/git logging code. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace: (107 commits) userns: Convert the ufs filesystem to use kuid/kgid where appropriate userns: Convert the udf filesystem to use kuid/kgid where appropriate userns: Convert ubifs to use kuid/kgid userns: Convert squashfs to use kuid/kgid where appropriate userns: Convert reiserfs to use kuid and kgid where appropriate userns: Convert jfs to use kuid/kgid where appropriate userns: Convert jffs2 to use kuid and kgid where appropriate userns: Convert hpfs to use kuid and kgid where appropriate userns: Convert btrfs to use kuid/kgid where appropriate userns: Convert bfs to use kuid/kgid where appropriate userns: Convert affs to use kuid/kgid wherwe appropriate userns: On alpha modify linux_to_osf_stat to use convert from kuids and kgids userns: On ia64 deal with current_uid and current_gid being kuid and kgid userns: On ppc convert current_uid from a kuid before printing. userns: Convert s390 getting uid and gid system calls to use kuid and kgid userns: Convert s390 hypfs to use kuid and kgid where appropriate userns: Convert binder ipc to use kuids userns: Teach security_path_chown to take kuids and kgids userns: Add user namespace support to IMA userns: Convert EVM to deal with kuids and kgids in it's hmac computation ...
2012-10-01Merge branch 'for-linus' of ↵Linus Torvalds27-368/+1043
git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull s390 updates from Martin Schwidefsky: "The main new feature is machine support for System zEC12 including transactional memory, runtime instrumentation, support for scm block devices via eadm subchannels, and support for CEX4 crypto cards. In addition there are some nice improvements: bpf jit compiler, arch backend for cmpxchg_double, relative exception table entries, dasd partition detection independent from the dasd driver ioctls, and cpu cache information in /proc/cpuinfo and /sys/device/cpu. And last but not least a series of cleanup patches from Heiko." Fix up trivial add-add conflict in arch/s390/Kconfig due to commit b952741c8079 ("cputime: Generalize CONFIG_VIRT_CPU_ACCOUNTING") * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (76 commits) s390: update defconfig s390/jump label,nss: let shared kernel support depend on !JUMP_LABEL s390/disassembler: fix decoding of risblg instruction s390/bpf,jit: add support for BPF_S_ANC_ALU_XOR_X instruction s390/traps: move call to print_modules() out of show_regs() s390/mm: mark free_initrd_mem() as __init s390/dasd: check count address during online setting drivers/s390/char/monreader.c: fix error return code s390/cmpxchg,percpu: implement cmpxchg_double() s390/percpu: implement this_cpu_add_return() s390/percpu: implement this_cpu_xchg() s390/kexec: remove CONFIG_KEXEC s390/irq: use designated initializers for irq class array s390: add uninitialized_var() to suppress false positive compiler warnings s390/crashdump: move fill_cpu_elf_notes() prototype to header file s390/process: add missing header include s390/ptrace: add missing ifdef s390/ipl,decrompressor: disable branch profiling s390/perf_events: compile only for CONFIG_64BIT s390/tape: remove even more tape block leftovers ...
2012-10-01Merge branch 'sched-core-for-linus' of ↵Linus Torvalds1-4/+4
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull scheduler changes from Ingo Molnar: "Continued quest to clean up and enhance the cputime code by Frederic Weisbecker, in preparation for future tickless kernel features. Other than that, smallish changes." Fix up trivial conflicts due to additions next to each other in arch/{x86/}Kconfig * 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (24 commits) cputime: Make finegrained irqtime accounting generally available cputime: Gather time/stats accounting config options into a single menu ia64: Reuse system and user vtime accounting functions on task switch ia64: Consolidate user vtime accounting vtime: Consolidate system/idle context detection cputime: Use a proper subsystem naming for vtime related APIs sched: cpu_power: enable ARCH_POWER sched/nohz: Clean up select_nohz_load_balancer() sched: Fix load avg vs. cpu-hotplug sched: Remove __ARCH_WANT_INTERRUPTS_ON_CTXSW sched: Fix nohz_idle_balance() sched: Remove useless code in yield_to() sched: Add time unit suffix to sched sysctl knobs sched/debug: Limit sd->*_idx range on sysctl sched: Remove AFFINE_WAKEUPS feature flag s390: Remove leftover account_tick_vtime() header cputime: Consolidate vtime handling on context switch sched: Move cputime code to its own file cputime: Generalize CONFIG_VIRT_CPU_ACCOUNTING tile: Remove SD_PREFER_LOCAL leftover ...
2012-09-30s390: convert to generic kernel_execve()Al Viro2-49/+12
same situation as with alpha and arm - only massage needed Signed-off-by: Al Viro <[email protected]>
2012-09-30s390: switch to generic kernel_thread()Al Viro1-39/+33
Signed-off-by: Al Viro <[email protected]>
2012-09-30s390: fold kernel_thread_helper() into ret_from_fork()Al Viro3-16/+28
... and don't bother with syscall return path in case of kernel threads. Signed-off-by: Al Viro <[email protected]>
2012-09-30s390: fold execve_tail() into start_thread(), convert to generic sys_execve()Al Viro7-61/+1
Signed-off-by: Al Viro <[email protected]>
2012-09-26s390/disassembler: fix decoding of risblg instructionHeiko Carstens1-1/+1
Fix typo: risblk -> risblg. Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-09-26s390/traps: move call to print_modules() out of show_regs()Heiko Carstens1-1/+1
Same as 0fa0e2f0 "x86: Move call to print_modules() out of show_regs()". Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-09-26s390/kexec: remove CONFIG_KEXECHeiko Carstens2-8/+2
Since "Kconfig: split the s390 base menu" CONFIG_KEXEC gets always selected. Therefore there is no point in keeping CONFIG_KEXEC anywhere. Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-09-26s390/irq: use designated initializers for irq class arrayHeiko Carstens1-29/+29
Use designated initializers for the irq class array in irq.c so it's always guaranteed that the order of elements is equal to their corresponding parts in irq.h. Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-09-26s390: add uninitialized_var() to suppress false positive compiler warningsHeiko Carstens1-1/+1
Get rid of these: arch/s390/kernel/smp.c:134:19: warning: ‘status’ may be used uninitialized in this function [-Wuninitialized] arch/s390/mm/pgtable.c:641:10: warning: ‘table’ may be used uninitialized in this function [-Wuninitialized] arch/s390/mm/pgtable.c:644:12: warning: ‘page’ may be used uninitialized in this function [-Wuninitialized] drivers/s390/cio/cio.c:1037:14: warning: ‘schid’ may be used uninitialized in this function [-Wuninitialized] Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-09-26s390/crashdump: move fill_cpu_elf_notes() prototype to header fileHeiko Carstens2-3/+3
Move fill_cpu_elf_notes() prototype to header file. This way we get compile errors if e.g. the number of function parameters get changed. Otherwise it's possible to change just the definition and everything else still compiles fine, but the result is broken code. Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-09-26s390/process: add missing header includeHeiko Carstens1-0/+1
Add appropriate header file: arch/s390/kernel/process.c:327:15: warning: symbol 'arch_align_stack' was not declared. Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-09-26s390/ptrace: add missing ifdefHeiko Carstens1-1/+2
if (MACHINE_HAS_TE) translates to if (0) on !CONFIG_64BIT however the compiler still warns about invalid shifts within non-reachable code. So add an explicit ifdef to get rid of this warning: arch/s390/kernel/ptrace.c: In function ‘update_per_regs’: arch/s390/kernel/ptrace.c:63:4: warning: left shift count >= width of type [enabled by default] arch/s390/kernel/ptrace.c:65:4: warning: left shift count >= width of type [enabled by default] Reported-by: Fengguang Wu <[email protected]> Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-09-26s390/perf_events: compile only for CONFIG_64BITHeiko Carstens1-1/+4
The whole hardware support is only available in zArch mode. Fixes also this compile warning: arch/s390/kernel/perf_cpum_cf.c: In function ‘cpumf_pmu_init’: arch/s390/kernel/perf_cpum_cf.c:670:2: warning: left shift count >= width of type [enabled by default] Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-09-26s390/topology: use for_each_set_bit to simplify the codeWei Yongjun1-4/+1
Use for_each_set_bit() to simplify the code. spatch with a semantic match is used to found this. (http://coccinelle.lip6.fr/) Signed-off-by: Wei Yongjun <[email protected]> Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-09-26s390/syscalls: wire up kcmp system callHeiko Carstens2-0/+9
Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-09-26s390/kexec: change return value of machine_kexec_prepareHeiko Carstens1-1/+1
Returning -ENOSYS on kexec_load() is a bad idea since user space cannot tell if the system call is not implmented or if it failed. Use -EOPNOTSUPP in case somebody tries a kexec_load on a NSS image based kernel instead. Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-09-26s390/etr,stp: use -EOPNOTSUPP instead of -ENOSYSHeiko Carstens1-2/+2
Change -ENOSYS to -EOPNOTSUPP. Return value is used only internally. Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-09-26s390/sysinfo,stsi: change return code handlingHeiko Carstens3-33/+45
Change return code handling of the stsi() function: In case function code 0 was specified the return value is the current configuration level (already shifted). That way all the code that actually copied the stsi_0() function can go away. Otherwise the return value is 0 (success) or negative to indicate an error (currently only -EOPNOTSUPP). Also stsi() is no longer an inline function. The function is not performance critical, but every caller would generate an exception table entry for this function. Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-09-26s390/exceptions: switch to relative exception table entriesHeiko Carstens4-7/+6
This is the s390 port of 70627654 "x86, extable: Switch to relative exception table entries". Reduces the size of our exception tables by 50% on 64 bit builds. Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-09-26s390/smp,topology: add polarization member to pcpu structHeiko Carstens2-11/+23
The cpu polarization member is the only per cpu state that is not part of the pcpu structure. So add it there and have everything in one place. Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-09-26s390/sysinfo,topology: fix cpu topology maximum nesting detectionHeiko Carstens3-20/+29
The maximum nesting of the cpu topology is evaluated when /proc/sysinfo is the first time read. This happens without a lock and a concurrent reader on a different cpu can see and use an invalid intermediate value. Besides the fact that this race is quite unlikely the worst thing that could happen is that /proc/sysinfo would contain bogus information about the machine's cpu topology. Nevertheless this should be fixed. So move the detection code to the early machine detection code and since now the value is early available use it in the topology code as well. Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-09-26s390/sysinfo: add additional z196 fields to outputHeiko Carstens1-8/+24
Add a couple of missing fields that were introduced with z196. Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-09-26s390/sysinfo: convert /proc/sysinfo to seqfileHeiko Carstens1-167/+115
The current proc implementation of the /proc/sysinfo file writes all informations contained in all system information blocks to a single page. This is done by calling sprintf all the time in the expectation that everything will fit into a single page. This however is not necessarily true if the configuration of a machine is very large. So convert /proc/sysinfo to avoid writing into random memory regions. For readability reasons a couple of lines are longer than 80 characters. Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-09-26s390/topology: remove sysinfo header include, add forward declaration insteadHeiko Carstens1-0/+1
Any change to sysinfo.h causes a whole kernel recompile since sysinfo.h is included by topology.h, which again is used nearly everywhere. So remove that include and add a forward declaration instead. Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-09-26s390/mm: shorten addressing mode initializationHeiko Carstens1-18/+10
Shorten the code for addressing mode initialization. Also add missing __init annotations, since this code is only used during kernel initialization. Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-09-26s390/mm: rename addressing_mode to s390_user_modeHeiko Carstens3-10/+10
Renaming the globally visible variable "user_mode" to "addressing_mode" in order to fix a name clash was not a good idea. (Commit 37fe1d73 "s390/mm: rename user_mode variable to addressing_mode") Looking at the code after a couple of weeks one thinks: addressing mode of what? So rename the variable again. This time to s390_user_mode. Which hopefully makes more sense. Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-09-26s390/mm: change default addressing modeHeiko Carstens1-11/+1
Change the default addressing mode so that user space runs in primary space and the kernel runs in home space. In addition remove the "switch_amode" kernel parameter so all users who already specified they want the new default behaviour will stay in the "switched" mode instead of in the opposite they intended. If there is a need to switch addressing modes, this can be done with the "user_mode" kernel parameter: user_mode=home Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-09-26s390/smp: avoid concurrent write to sigp status fieldHeiko Carstens1-6/+7
When a sigp instruction is issued it may store a status. This status is currently stored in a per cpu field of the target cpu. If multiple cpus issue a sigp instruction with the same target cpu and a status is stored the result is not necessarily as expected. Currently this is not an issue: - on cpu hotplug no sigps, except "restart" and "sense" are sent to the target cpu. - on external call we don't look at the status if it is stored - on sense running the condition code "status stored" is sufficient to tell if a cpu is running or not Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
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