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2013-09-07s390: make various functions static, add declarations to header filesHeiko Carstens6-15/+11
Make various functions static, add declarations to header files to fix a couple of sparse findings. Signed-off-by: Heiko Carstens <[email protected]>
2013-09-07s390/compat signal: add couple of __force annotationsHeiko Carstens1-5/+5
Add __force annotations to get rid of a couple of sparse warnings: arch/s390/kernel/compat_signal.c:335:35: warning: cast removes address space of expression Signed-off-by: Heiko Carstens <[email protected]>
2013-09-04Merge branch 'timers-nohz-for-linus' of ↵Linus Torvalds1-0/+1
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull timers/nohz changes from Ingo Molnar: "It mostly contains fixes and full dynticks off-case optimizations, by Frederic Weisbecker" * 'timers-nohz-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (24 commits) nohz: Include local CPU in full dynticks global kick nohz: Optimize full dynticks's sched hooks with static keys nohz: Optimize full dynticks state checks with static keys nohz: Rename a few state variables vtime: Always debug check snapshot source _before_ updating it vtime: Always scale generic vtime accounting results vtime: Optimize full dynticks accounting off case with static keys vtime: Describe overriden functions in dedicated arch headers m68k: hardirq_count() only need preempt_mask.h hardirq: Split preempt count mask definitions context_tracking: Split low level state headers vtime: Fix racy cputime delta update vtime: Remove a few unneeded generic vtime state checks context_tracking: User/kernel broundary cross trace events context_tracking: Optimize context switch off case with static keys context_tracking: Optimize guest APIs off case with static key context_tracking: Optimize main APIs off case with static key context_tracking: Ground setup for static key use context_tracking: Remove full dynticks' hacky dependency on wide context tracking nohz: Only enable context tracking on full dynticks CPUs ...
2013-09-04s390/irq: rework irq subclass handlingHeiko Carstens3-43/+20
Let's not add a function for every external interrupt subclass for which we need reference counting. Just have two register/unregister functions which have a subclass parameter: void irq_subclass_register(enum irq_subclass subclass); void irq_subclass_unregister(enum irq_subclass subclass); Signed-off-by: Heiko Carstens <[email protected]>
2013-09-04s390/irq: use hlists for external interrupt handler arrayHeiko Carstens1-12/+12
Use hlists for the hashed array of external interrupt handlers. Reduces the size of the array by 50% (2KB). Signed-off-by: Heiko Carstens <[email protected]>
2013-09-04s390/dumpstack: convert print_symbol to %pSRHeiko Carstens1-10/+10
This is the same as what other architectures did. The change has also the advantage that there won't be any interleaving messages between printk() and print_symbol(). Signed-off-by: Heiko Carstens <[email protected]>
2013-09-04s390/perf: Remove print_hex_dump_bytes() debug outputHendrik Brueckner1-4/+1
Signed-off-by: Hendrik Brueckner <[email protected]> Signed-off-by: Heiko Carstens <[email protected]>
2013-08-30s390/pci: update function handle after resume from hibernateSebastian Ott1-0/+2
Function handles may change while the system was in hibernation use list pci functions and update the function handles. Signed-off-by: Sebastian Ott <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2013-08-30s390/hibernate: add early resume functionSebastian Ott2-5/+11
Some functions that do arch specific resume actions are called directly from swsusp_asm64.S . Before we add another function call provide a generic s390_early_resume function which can be used for this purpose. Signed-off-by: Sebastian Ott <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2013-08-28s390/tx: allow program interruption filtering in user spaceMartin Schwidefsky1-3/+3
A user space program using the transactional execution facility should be allowed to do program interrupt filtering. Do not set the transactional-execution program-interruption-filtering override (PIFO) bit in CR0. Signed-off-by: Martin Schwidefsky <[email protected]>
2013-08-28s390/time: return with irqs disabled from psw_idleMartin Schwidefsky4-4/+4
Modify the psw_idle waiting logic in entry[64].S to return with interrupts disabled. This avoids potential issues with udelay and interrupt loops as interrupts are not reenabled after clock comparator interrupts. Signed-off-by: Martin Schwidefsky <[email protected]>
2013-08-22s390/kprobes: add support for compare and branch instructionsHeiko Carstens1-2/+19
The compare and branch instructions (not relative) all need special handling when kprobed: - if a branch was taken, the instruction pointer should be left alone - if a branch was not taken, the instruction pointer must be adjusted The compare and branch instructions family was introduced with the general instruction extension facility (z10). Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2013-08-22s390/time: clock comparator revalidationMartin Schwidefsky1-4/+1
Always use the S390_lowcore.clock_comparator field to revalidate the clock comparator CPU register after a machine check. This avoids an unnecssary external interrupt after a machine check if no timer is pending. Signed-off-by: Martin Schwidefsky <[email protected]>
2013-08-22s390/mm: cleanup page table definitionsMartin Schwidefsky1-2/+2
Improve the encoding of the different pte types and the naming of the page, segment table and region table bits. Due to the different pte encoding the hugetlbfs primitives need to be adapted as well. To improve compatability with common code make the huge ptes use the encoding of normal ptes. The conversion between the pte and pmd encoding for a huge pte is done with set_huge_pte_at and huge_ptep_get. Overall the code is now easier to understand. Reviewed-by: Gerald Schaefer <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2013-08-22s390: convert interrupt handling to use generic hardirqMartin Schwidefsky3-106/+75
With the introduction of PCI it became apparent that s390 should convert to generic hardirqs as too many drivers do not have the correct dependency for GENERIC_HARDIRQS. On the architecture level s390 does not have irq lines. It has external interrupts, I/O interrupts and adapter interrupts. This patch hard-codes all external interrupts as irq #1, all I/O interrupts as irq #2 and all adapter interrupts as irq #3. The additional information from the lowcore associated with the interrupt is stored in the pt_regs of the interrupt frame, where the interrupt handler can pick it up. For PCI/MSI interrupts the adapter interrupt handler scans the relevant bit fields and calls generic_handle_irq with the virtual irq number for the MSI interrupt. Reviewed-by: Sebastian Ott <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2013-08-22s390: replace remaining strict_strtoul() with kstrtoul()Heiko Carstens2-2/+2
Replace the last two strict_strtoul() with kstrtoul(). Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2013-08-14Merge branch 'timers/nohz-v3' of ↵Ingo Molnar1-0/+1
git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks into timers/nohz Pull nohz improvements from Frederic Weisbecker: " It mostly contains fixes and full dynticks off-case optimizations. I believe that distros want to enable this feature so it seems important to optimize the case where the "nohz_full=" parameter is empty. ie: I'm trying to remove any performance regression that comes with NO_HZ_FULL=y when the feature is not used. This patchset improves the current situation a lot (off-case appears to be around 11% faster with hackbench, although I guess it may vary depending on the configuration but it should be significantly faster in any case) now there is still some work to do: I can still observe a remaining loss of 1.6% throughput seen with hackbench compared to CONFIG_NO_HZ_FULL=n. " Signed-off-by: Ingo Molnar <[email protected]>
2013-08-14vtime: Describe overriden functions in dedicated arch headersFrederic Weisbecker1-0/+1
If the arch overrides some generic vtime APIs, let it describe these on a dedicated and standalone header. This way it becomes convenient to include it in vtime generic headers without irrelevant stuff in such a low level header. Signed-off-by: Frederic Weisbecker <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Paul E. McKenney <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Li Zhong <[email protected]> Cc: Mike Galbraith <[email protected]> Cc: Kevin Hilman <[email protected]> Cc: Martin Schwidefsky <[email protected]> Cc: Heiko Carstens <[email protected]>
2013-07-26s390/perf: fix compile error (undefined reference sie_exit)Heiko Carstens1-4/+5
The perf_event code references sie_exit even if KVM is not available. So add proper ifdefs to fix this one: arch/s390/built-in.o: In function `sys_call_table_emu': (.rodata+0x2b98): undefined reference to `sie_exit' arch/s390/built-in.o: In function `sys_call_table_emu': (.rodata+0x2ba0): undefined reference to `sie_exit' make: *** [vmlinux] Error 1 Reported-by: Zhouping Liu <[email protected]> Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2013-07-26s390: add support for IBM zBC12 machineHeiko Carstens1-0/+1
Just add the new model number where appropiate. Cc: [email protected] # v3.10 Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2013-07-19Merge branch 'for-linus' of ↵Linus Torvalds2-15/+86
git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull s390 fixes from Martin Schwidefsky: "An update for the BFP jit to the latest and greatest, two patches to get kdump working again, the random-abort ptrace extention for transactional execution, the z90crypt module alias for ap and a tiny cleanup" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: s390/zcrypt: Alias for new zcrypt device driver base module s390/kdump: Allow copy_oldmem_page() copy to virtual memory s390/kdump: Disable mmap for s390 s390/bpf,jit: add pkt_type support s390/bpf,jit: address randomize and write protect jit code s390/bpf,jit: use generic jit dumper s390/bpf,jit: call module_free() from any context s390/qdio: remove unused variable s390/ptrace: PTRACE_TE_ABORT_RAND
2013-07-18s390/kdump: Allow copy_oldmem_page() copy to virtual memoryMichael Holzheu1-4/+47
The kdump mmap patch series (git commit 83086978c63afd7c73e1c) changed the requirements for copy_oldmem_page(). Now this function is used for copying to virtual memory. So implement vmalloc support for the s390 version of copy_oldmem_page(). Signed-off-by: Michael Holzheu <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2013-07-16s390/ptrace: PTRACE_TE_ABORT_RANDMichael Mueller1-11/+39
The patch implements a s390 specific ptrace request PTRACE_TE_ABORT_RAND to modify the randomness of spontaneous aborts of memory transactions of the transaction execution facility. The data argument of the ptrace request is used to specify the levels of randomness, 0 for normal operation, 1 to abort every transaction at a random instruction, and 2 to abort a random transaction at a random instruction. The default is 0 for normal operation. Acked-by: Heiko Carstens <[email protected]> Signed-off-by: Michael Mueller <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2013-07-14s390: delete __cpuinit usage from all s390 filesPaul Gortmaker6-24/+22
The __cpuinit type of throwaway sections might have made sense some time ago when RAM was more constrained, but now the savings do not offset the cost and complications. For example, the fix in commit 5e427ec2d0 ("x86: Fix bit corruption at CPU resume time") is a good example of the nasty type of bugs that can be created with improper use of the various __init prefixes. After a discussion on LKML[1] it was decided that cpuinit should go the way of devinit and be phased out. Once all the users are gone, we can then finally remove the macros themselves from linux/init.h. Note that some harmless section mismatch warnings may result, since notify_cpu_starting() and cpu_up() are arch independent (kernel/cpu.c) are flagged as __cpuinit -- so if we remove the __cpuinit from arch specific callers, we will also get section mismatch warnings. As an intermediate step, we intend to turn the linux/init.h cpuinit content into no-ops as early as possible, since that will get rid of these warnings. In any case, they are temporary and harmless. This removes all the arch/s390 uses of the __cpuinit macros from all C files. Currently s390 does not have any __CPUINIT used in assembly files. [1] https://lkml.org/lkml/2013/5/20/589 Cc: Martin Schwidefsky <[email protected]> Cc: Heiko Carstens <[email protected]> Cc: [email protected] Cc: [email protected] Signed-off-by: Paul Gortmaker <[email protected]>
2013-07-03Merge branch 'akpm' (updates from Andrew Morton)Linus Torvalds1-4/+0
Merge first patch-bomb from Andrew Morton: - various misc bits - I'm been patchmonkeying ocfs2 for a while, as Joel and Mark have been distracted. There has been quite a bit of activity. - About half the MM queue - Some backlight bits - Various lib/ updates - checkpatch updates - zillions more little rtc patches - ptrace - signals - exec - procfs - rapidio - nbd - aoe - pps - memstick - tools/testing/selftests updates * emailed patches from Andrew Morton <[email protected]>: (445 commits) tools/testing/selftests: don't assume the x bit is set on scripts selftests: add .gitignore for kcmp selftests: fix clean target in kcmp Makefile selftests: add .gitignore for vm selftests: add hugetlbfstest self-test: fix make clean selftests: exit 1 on failure kernel/resource.c: remove the unneeded assignment in function __find_resource aio: fix wrong comment in aio_complete() drivers/w1/slaves/w1_ds2408.c: add magic sequence to disable P0 test mode drivers/memstick/host/r592.c: convert to module_pci_driver drivers/memstick/host/jmb38x_ms: convert to module_pci_driver pps-gpio: add device-tree binding and support drivers/pps/clients/pps-gpio.c: convert to module_platform_driver drivers/pps/clients/pps-gpio.c: convert to devm_* helpers drivers/parport/share.c: use kzalloc Documentation/accounting/getdelays.c: avoid strncpy in accounting tool aoe: update internal version number to v83 aoe: update copyright date aoe: perform I/O completions in parallel ...
2013-07-03s390: remove setting for saved_max_pfnZhang Yanfei1-4/+0
The only user of saved_max_pfn in s390 is read_oldmem interface but we have removed that interface, so saved_max_pfn is now unneeded in s390, and we needn't set it anymore. Signed-off-by: Zhang Yanfei <[email protected]> Cc: Martin Schwidefsky <[email protected]> Cc: Heiko Carstens <[email protected]> Cc: Michael Holzheu <[email protected]> Cc: "Eric W. Biederman" <[email protected]> Cc: "H. Peter Anvin" <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Cc: Dave Hansen <[email protected]> Cc: Fenghua Yu <[email protected]> Cc: Matt Fleming <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Ralf Baechle <[email protected]> Cc: Tony Luck <[email protected]> Cc: Vivek Goyal <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-07-03Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds4-42/+95
Pull KVM fixes from Paolo Bonzini: "On the x86 side, there are some optimizations and documentation updates. The big ARM/KVM change for 3.11, support for AArch64, will come through Catalin Marinas's tree. s390 and PPC have misc cleanups and bugfixes" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (87 commits) KVM: PPC: Ignore PIR writes KVM: PPC: Book3S PR: Invalidate SLB entries properly KVM: PPC: Book3S PR: Allow guest to use 1TB segments KVM: PPC: Book3S PR: Don't keep scanning HPTEG after we find a match KVM: PPC: Book3S PR: Fix invalidation of SLB entry 0 on guest entry KVM: PPC: Book3S PR: Fix proto-VSID calculations KVM: PPC: Guard doorbell exception with CONFIG_PPC_DOORBELL KVM: Fix RTC interrupt coalescing tracking kvm: Add a tracepoint write_tsc_offset KVM: MMU: Inform users of mmio generation wraparound KVM: MMU: document fast invalidate all mmio sptes KVM: MMU: document fast invalidate all pages KVM: MMU: document fast page fault KVM: MMU: document mmio page fault KVM: MMU: document write_flooding_count KVM: MMU: document clear_spte_count KVM: MMU: drop kvm_mmu_zap_mmio_sptes KVM: MMU: init kvm generation close to mmio wrap-around value KVM: MMU: add tracepoint for check_mmio_spte KVM: MMU: fast invalidate all mmio sptes ...
2013-06-26s390/irq: store interrupt information in pt_regsMartin Schwidefsky5-10/+29
Copy the interrupt parameters from the lowcore to the pt_regs structure in entry[64].S and reduce the arguments of the low level interrupt handler to the pt_regs pointer only. In addition move the test-pending-interrupt loop from do_IRQ to entry[64].S to make sure that interrupt information is always delivered via pt_regs. Signed-off-by: Martin Schwidefsky <[email protected]>
2013-06-26s390/smp: get rid of generic_smp_call_function_interruptHeiko Carstens1-4/+1
Since 9a46ad6d6 "smp: make smp_call_function_many() use logic similar to smp_call_function_single()" generic_smp_call_function_interrupt() is only an alias to generic_smp_call_function_single_interrupt(). So remove the superfluous variant. Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2013-06-24s390/ipl: Fix FCP WWPN and LUN format strings for readMichael Holzheu1-4/+4
The following git commit changed the behavior of sscanf: commit 53809751ac230a3611b5cdd375f3389f3207d471 Author: Jan Beulich <[email protected]> Date: Mon Dec 17 16:01:31 2012 -0800 sscanf: don't ignore field widths for numeric conversions This broke the WWPN and LUN sysfs attributes for s390 reipl and dump on panic. Example: $ echo 0x0123456701234567 > /sys/firmware/reipl/fcp/wwpn $ cat /sys/firmware/reipl/fcp/wwpn 0x0001234567012345 So fix this and use format strings that work also with the new sscanf implementation: $ echo 0x012345670123456789 > /sys/firmware/reipl/fcp/wwpn $ cat /sys/firmware/reipl/fcp/wwpn 0x0123456701234567 Cc: [email protected] # 3.8+ Reviewed-by: Steffen Maier <[email protected]> Signed-off-by: Michael Holzheu <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2013-06-19s390/irq: Only define synchronize_irq() on SMPBen Hutchings1-0/+2
In uniprocessor configurations, synchronize_irq() is defined in <linux/hardirq.h> as a macro, and this function definition fails to compile. Reported-by: kbuild test robot <[email protected]> Signed-off-by: Ben Hutchings <[email protected]> Cc: [email protected] # 3.9 Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2013-06-17KVM: s390,perf: Detect if perf samples belong to KVM host or guestHeinz Graalfs3-0/+54
This patch is based on an original patch of David Hildenbrand. The perf core implementation calls architecture specific code in order to ask for specific information for a particular sample: perf_instruction_pointer() When perf core code asks for the instruction pointer, architecture specific code must detect if a KVM guest was running when the sample was taken. A sample can be associated with a KVM guest when the PSW supervisor state bit is set and the PSW instruction pointer part contains the address of 'sie_exit'. A KVM guest's instruction pointer information is then retrieved via gpsw entry pointed to by the sie control-block. perf_misc_flags() perf code code calls this function in order to associate the kernel vs. user state infomation with a particular sample. Architecture specific code must also first detectif a KVM guest was running at the time the sample was taken. Signed-off-by: Heinz Graalfs <[email protected]> Reviewed-by: Hendrik Brueckner <[email protected]> Signed-off-by: Christian Borntraeger <[email protected]> Signed-off-by: Cornelia Huck <[email protected]> Signed-off-by: Paolo Bonzini <[email protected]>
2013-06-10s390/pci: Implement IRQ functions if !PCIBen Hutchings1-0/+64
All architectures must implement IRQ functions. Since various dependencies on !S390 were removed, there are various drivers that can be selected but will fail to link. Provide a dummy implementation of these functions for the !PCI case. Signed-off-by: Ben Hutchings <[email protected]> Cc: [email protected] # 3.9 Acked-by: David S. Miller <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2013-06-05s390/sclp: fix new line detectionPeter Oberparleiter1-1/+1
When printing multi-line text using sclp_print, line endings are not correctly handled. The routine is expecting an EBCDIC new line character as line terminator while the input text is encoded in ASCII format. Fix this problem by modifying sclp_print to scan for ASCII new line characters. Signed-off-by: Peter Oberparleiter <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2013-06-05s390/dumpstack: fix address ranges for asynchronous and panic stackMartin Schwidefsky1-4/+8
git commit dc7ee00d4771b321 "s390: lowcore stack pointer offsets" introduced a regression in regard to show_stack(). The stack pointer for the asynchronous and the panic stack in the lowcore now have an additional offset applied to them. This offset needs to be taken into account in the calculation for the low and high address for the stacks. Signed-off-by: Martin Schwidefsky <[email protected]>
2013-05-27s390/smp: lost IPIs on cpu hotplugHeiko Carstens1-16/+11
IPIs might be lost when a cpu gets brought offline: When stop_machine executes its state machine there is a race window for the state STOPMACHINE_DISABLE_IRQ where the to be brought offline cpu might already have irqs disabled but a different cpu still may have irqs enabled. If the enabled cpu receives an interrupt and as a result sends an IPI to the to be offlined cpu in its bottom halve context, the IPI won't be noticed before the cpu is offline. In fact the race window is much larger since there is no guarantee when an IPI will be received. To fix this check for enqueued but not yet received IPIs in the cpu_disable() path and call the respective handlers before the cpu is marked offline. Reported-by: Juergen Doelle <[email protected]> Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2013-05-21Merge branch 'for-linus' of ↵Linus Torvalds5-8/+9
git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull s390 update from Martin Schwidefsky: "An additional sysfs attribute for channel paths and a couple of bux fixes" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: s390/pgtable: fix ipte notify bit s390/xpram: mark xpram as non-rotational s390/smp: fix cpu re-scan vs. cpu state s390/cio: add channel ID sysfs attribute s390/ftrace: fix mcount adjustment s390: fix gmap_ipte_notifier vs. software dirty pages s390: disable pfmf for clear page instruction s390/disassembler: prevent endless loop in print_fn_code() s390: remove non existent reference to GENERIC_KERNEL_THREAD
2013-05-21s390/kvm: avoid automatic sie reentryMartin Schwidefsky1-43/+33
Do not automatically restart the sie instruction in entry64.S after an interrupt, return to the caller with a reason code instead. That allows to deal with RCU and other conditions in C code. Signed-off-by: Martin Schwidefsky <[email protected]> Signed-off-by: Christian Borntraeger <[email protected]> Signed-off-by: Gleb Natapov <[email protected]>
2013-05-21s390/kvm: Provide a way to prevent reentering SIEChristian Borntraeger2-1/+4
Lets provide functions to prevent KVM from reentering SIE and to kick cpus out of SIE. We cannot use the common kvm_vcpu_kick code, since we need to kick out guests in places that hold architecture specific locks (e.g. pgste lock) which might be necessary on the other cpus - so no waiting possible. So lets provide a bit in a private field of the sie control block that acts as a gate keeper, after we claimed we are in SIE. Please note that we do not reuse prog0c, since we want to access that bit without atomic ops. Signed-off-by: Christian Borntraeger <[email protected]> Acked-by: Martin Schwidefsky <[email protected]> Signed-off-by: Gleb Natapov <[email protected]>
2013-05-21s390/kvm: Mark if a cpu is in SIEChristian Borntraeger2-3/+9
Lets track in a private bit if the sie control block is active. We want to track this as closely as possible, so we also have to instrument the interrupt and program check handler. Lets use the existing HANDLE_SIE_INTERCEPT macro. Signed-off-by: Christian Borntraeger <[email protected]> Acked-by: Martin Schwidefsky <[email protected]> Signed-off-by: Gleb Natapov <[email protected]>
2013-05-17s390/smp: fix cpu re-scan vs. cpu stateMartin Schwidefsky1-1/+1
The cpu-info array starts with a list of cpus in configured state, followed by the cpus in standby state. The comparison to decide which state a cpu has is incorrect, this causes configured cpus appear as standby cpus. The correct comparison is the index of the new cpu in the cpu-info array vs. the number of configured cpus. Signed-off-by: Martin Schwidefsky <[email protected]>
2013-05-15s390/ftrace: fix mcount adjustmentHeiko Carstens3-7/+6
Tony Jones reported that the ftrace self tests on s390 do not work: <6>Testing dynamic ftrace ops #1: (0 0 0 0 0) FAILED! <6>Testing tracer irqsoff: <3>failed to start irqsoff tracer <4>.. no entries found ..FAILED! <6>Testing tracer wakeup: <3>failed to start wakeup tracer <4>.. no entries found ..FAILED! <6>Testing tracer function_graph: <4>Failed to init function_graph tracer, init returned -19 <4>FAILED! This happens because we forgot to adjust the instruction pointer that gets passed to the ftrace trace function by MCOUNT_INSN_SIZE. In addition change MCOUNT_INSN_SIZE to the correct value on 31 bit. It only worked so far because the to be patched instruction was identical. Reported-by: Tony Jones <[email protected]> Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2013-05-10Merge branch 'for-linus' of ↵Linus Torvalds2-15/+2
git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal Pull stray syscall bits from Al Viro: "Several syscall-related commits that were missing from the original" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal: switch compat_sys_sysctl to COMPAT_SYSCALL_DEFINE unicore32: just use mmap_pgoff()... unify compat fanotify_mark(2), switch to COMPAT_SYSCALL_DEFINE x86, vm86: fix VM86 syscalls: use SYSCALL_DEFINEx(...)
2013-05-09switch compat_sys_sysctl to COMPAT_SYSCALL_DEFINEAl Viro2-5/+1
Signed-off-by: Al Viro <[email protected]>
2013-05-09unify compat fanotify_mark(2), switch to COMPAT_SYSCALL_DEFINEAl Viro2-10/+1
Signed-off-by: Al Viro <[email protected]>
2013-05-07s390/disassembler: prevent endless loop in print_fn_code()Heiko Carstens1-0/+2
If the size of the opcode to be printed is larger than "len" we'll see an overflow of an unsigned long value, which means that the while loop within print_fn_code() will loop quite a long time until there is the next chance for an exit. So add an early exit check. Reported-by: Christian Ehrhardt <[email protected]> Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2013-05-03s390/mem_detect: remove artificial kdump memory typesHeiko Carstens2-23/+9
Simplify the memory detection code a bit by removing the CHUNK_OLDMEM and CHUNK_CRASHK memory types. They are not needed. Everything that is needed is a mechanism to insert holes into the detected memory. Reviewed-by: Michael Holzheu <[email protected]> Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2013-05-02s390/mem_detect: limit memory detection loop to "mem=" parameterHeiko Carstens3-3/+2
The current memory detection loop will detect all present memory of a machine. This is true even if the user specified the "mem=" parameter on the kernel command line. This can be a problem since the memory detection may cause a fully populated host page table for the guest, even for those parts of the memory that the guest will never use afterwards. So fix this and only detect memory up to a user supplied "mem=" limit if specified. Reported-by: Michael Johanssen <[email protected]> Reviewed-by: Michael Holzheu <[email protected]> Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2013-05-02s390/kdump,bootmem: fix bootmem allocator bitmap sizeHeiko Carstens1-1/+5
When in kdump mode the kernel may access only the first couple of megabytes for execution, the rest contains the dump. However the size of the bitmap used by the bootmem allocator was calculated for the whole amount of memory of the machine. For very large machines this can lead to the situation that the kdump kernel will not come up because not enough memory is available. So fix this and calculate the size of the bitmap only for the piece of memory that the kdump kernel actually uses. Call reserve_oldmem() before setup_memory_end() so that the memory_chunk array already has been updated with respect to oldmem chunks. Afterwards setup_memory_end() will ignore those chunks. Reviewed-by: Michael Holzheu <[email protected]> Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2013-05-02s390: get rid of odd global real_memory_sizeHeiko Carstens1-8/+11
The variable real_memory_size has odd semantics and has been used in a broken way by e.g. the old kvm code. Therefore get rid of it before anybody else makes use of it. Reviewed-by: Michael Holzheu <[email protected]> Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
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