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2012-03-06kmsg_dump: don't run on non-error paths by defaultMatthew Garrett1-0/+6
Since commit 04c6862c055f ("kmsg_dump: add kmsg_dump() calls to the reboot, halt, poweroff and emergency_restart paths"), kmsg_dump() gets run on normal paths including poweroff and reboot. This is less than ideal given pstore implementations that can only represent single backtraces, since a reboot may overwrite a stored oops before it's been picked up by userspace. In addition, some pstore backends may have low performance and provide a significant delay in reboot as a result. This patch adds a printk.always_kmsg_dump kernel parameter (which can also be changed from userspace). Without it, the code will only be run on failure paths rather than on normal paths. The option can be enabled in environments where there's a desire to attempt to audit whether or not a reboot was cleanly requested or not. Signed-off-by: Matthew Garrett <mjg@redhat.com> Acked-by: Seiji Aguchi <seiji.aguchi@hds.com> Cc: Seiji Aguchi <seiji.aguchi@hds.com> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Marco Stornelli <marco.stornelli@gmail.com> Cc: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: Don Zickus <dzickus@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-01-19Merge branch 'release' of ↵Linus Torvalds1-0/+5
git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux This includes initial support for the recently published ACPI 5.0 spec. In particular, support for the "hardware-reduced" bit that eliminates the dependency on legacy hardware. APEI has patches resulting from testing on real hardware. Plus other random fixes. * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux: (52 commits) acpi/apei/einj: Add extensions to EINJ from rev 5.0 of acpi spec intel_idle: Split up and provide per CPU initialization func ACPI processor: Remove unneeded variable passed by acpi_processor_hotadd_init V2 ACPI processor: Remove unneeded cpuidle_unregister_driver call intel idle: Make idle driver more robust intel_idle: Fix a cast to pointer from integer of different size warning in intel_idle ACPI: kernel-parameters.txt : Add intel_idle.max_cstate intel_idle: remove redundant local_irq_disable() call ACPI processor: Fix error path, also remove sysdev link ACPI: processor: fix acpi_get_cpuid for UP processor intel_idle: fix API misuse ACPI APEI: Convert atomicio routines ACPI: Export interfaces for ioremapping/iounmapping ACPI registers ACPI: Fix possible alignment issues with GAS 'address' references ACPI, ia64: Use SRAT table rev to use 8bit or 16/32bit PXM fields (ia64) ACPI, x86: Use SRAT table rev to use 8bit or 32bit PXM fields (x86/x86-64) ACPI: Store SRAT table revision ACPI, APEI, Resolve false conflict between ACPI NVS and APEI ACPI, Record ACPI NVS regions ACPI, APEI, EINJ, Refine the fix of resource conflict ...
2012-01-17ACPI: kernel-parameters.txt : Add intel_idle.max_cstateMasanari Iida1-0/+5
Add missing intel_idle.max_cstate in kernel-parameters.txt Signed-off-by Masanari Iida <standby24x7@gmail.com> Signed-off-by: Len Brown <len.brown@intel.com>
2012-01-15Merge branch 'perf-core-for-linus' of ↵Linus Torvalds1-0/+8
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip * 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (39 commits) perf tools: Fix compile error on x86_64 Ubuntu perf report: Fix --stdio output alignment when --showcpuutilization used perf annotate: Get rid of field_sep check perf annotate: Fix usage string perf kmem: Fix a memory leak perf kmem: Add missing closedir() calls perf top: Add error message for EMFILE perf test: Change type of '-v' option to INCR perf script: Add missing closedir() calls tracing: Fix compile error when static ftrace is enabled recordmcount: Fix handling of elf64 big-endian objects. perf tools: Add const.h to MANIFEST to make perf-tar-src-pkg work again perf tools: Add support for guest/host-only profiling perf kvm: Do guest-only counting by default perf top: Don't update total_period on process_sample perf hists: Stop using 'self' for struct hist_entry perf hists: Rename total_session to total_period x86: Add counter when debug stack is used with interrupts enabled x86: Allow NMIs to hit breakpoints in i386 x86: Keep current stack in NMI breakpoints ...
2012-01-12Merge branch 'x86-debug-for-linus' of ↵Linus Torvalds1-0/+4
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip * 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86, reboot: Fix typo in nmi reboot path x86, NMI: Add to_cpumask() to silence compile warning x86, NMI: NMI selftest depends on the local apic x86: Add stack top margin for stack overflow checking x86, NMI: NMI-selftest should handle the UP case properly x86: Fix the 32-bit stackoverflow-debug build x86, NMI: Add knob to disable using NMI IPIs to stop cpus x86, NMI: Add NMI IPI selftest x86, reboot: Use NMI instead of REBOOT_VECTOR to stop cpus x86: Clean up the range of stack overflow checking x86: Panic on detection of stack overflow x86: Check stack overflow in detail
2012-01-12Merge branch 'slab/for-linus' of ↵Linus Torvalds1-0/+6
git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux * 'slab/for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux: slub: disallow changing cpu_partial from userspace for debug caches slub: add missed accounting slub: Extract get_freelist from __slab_alloc slub: Switch per cpu partial page support off for debugging slub: fix a possible memleak in __slab_alloc() slub: fix slub_max_order Documentation slub: add missed accounting slab: add taint flag outputting to debug paths. slub: add taint flag outputting to debug paths slab: introduce slab_max_order kernel parameter slab: rename slab_break_gfp_order to slab_max_order
2012-01-11Merge branch 'slab/urgent' into slab/for-linusPekka Enberg1-3/+3
2012-01-11Merge branch 'akpm' (aka "Andrew's patch-bomb")Linus Torvalds1-0/+19
Andrew elucidates: - First installmeant of MM. We have a HUGE number of MM patches this time. It's crazy. - MAINTAINERS updates - backlight updates - leds - checkpatch updates - misc ELF stuff - rtc updates - reiserfs - procfs - some misc other bits * akpm: (124 commits) user namespace: make signal.c respect user namespaces workqueue: make alloc_workqueue() take printf fmt and args for name procfs: add hidepid= and gid= mount options procfs: parse mount options procfs: introduce the /proc/<pid>/map_files/ directory procfs: make proc_get_link to use dentry instead of inode signal: add block_sigmask() for adding sigmask to current->blocked sparc: make SA_NOMASK a synonym of SA_NODEFER reiserfs: don't lock root inode searching reiserfs: don't lock journal_init() reiserfs: delay reiserfs lock until journal initialization reiserfs: delete comments referring to the BKL drivers/rtc/interface.c: fix alarm rollover when day or month is out-of-range drivers/rtc/rtc-twl.c: add DT support for RTC inside twl4030/twl6030 drivers/rtc/: remove redundant spi driver bus initialization drivers/rtc/rtc-jz4740.c: make jz4740_rtc_driver static drivers/rtc/rtc-mc13xxx.c: make mc13xxx_rtc_idtable static rtc: convert drivers/rtc/* to use module_platform_driver() drivers/rtc/rtc-wm831x.c: convert to devm_kzalloc() drivers/rtc/rtc-wm831x.c: remove unused period IRQ handler ...
2012-01-11mm: more intensive memory corruption debuggingStanislaw Gruszka1-0/+19
With CONFIG_DEBUG_PAGEALLOC configured, the CPU will generate an exception on access (read,write) to an unallocated page, which permits us to catch code which corrupts memory. However the kernel is trying to maximise memory usage, hence there are usually few free pages in the system and buggy code usually corrupts some crucial data. This patch changes the buddy allocator to keep more free/protected pages and to interlace free/protected and allocated pages to increase the probability of catching corruption. When the kernel is compiled with CONFIG_DEBUG_PAGEALLOC, debug_guardpage_minorder defines the minimum order used by the page allocator to grant a request. The requested size will be returned with the remaining pages used as guard pages. The default value of debug_guardpage_minorder is zero: no change from current behaviour. [akpm@linux-foundation.org: tweak documentation, s/flg/flag/] Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-01-11Merge branch 'nfs-for-3.3' of git://git.linux-nfs.org/projects/trondmy/linux-nfsLinus Torvalds1-6/+11
* 'nfs-for-3.3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: NFSv4: Change the default setting of the nfs4_disable_idmapping parameter NFSv4: Save the owner/group name string when doing open NFS: Remove pNFS bloat from the generic write path pnfs-obj: Must return layout on IO error pnfs-obj: pNFS errors are communicated on iodata->pnfs_error NFS: Cache state owners after files are closed NFS: Clean up nfs4_find_state_owners_locked() NFSv4: include bitmap in nfsv4 get acl data nfs: fix a minor do_div portability issue NFSv4.1: cleanup comment and debug printk NFSv4.1: change nfs4_free_slot parameters for dynamic slots NFSv4.1: cleanup init and reset of session slot tables NFSv4.1: fix backchannel slotid off-by-one bug nfs: fix regression in handling of context= option in NFSv4 NFS - fix recent breakage to NFS error handling. NFS: Retry mounting NFSROOT SUNRPC: Clean up the RPCSEC_GSS service ticket requests
2012-01-10Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommuLinus Torvalds1-1/+8
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (53 commits) iommu/amd: Set IOTLB invalidation timeout iommu/amd: Init stats for iommu=pt iommu/amd: Remove unnecessary cache flushes in amd_iommu_resume iommu/amd: Add invalidate-context call-back iommu/amd: Add amd_iommu_device_info() function iommu/amd: Adapt IOMMU driver to PCI register name changes iommu/amd: Add invalid_ppr callback iommu/amd: Implement notifiers for IOMMUv2 iommu/amd: Implement IO page-fault handler iommu/amd: Add routines to bind/unbind a pasid iommu/amd: Implement device aquisition code for IOMMUv2 iommu/amd: Add driver stub for AMD IOMMUv2 support iommu/amd: Add stat counter for IOMMUv2 events iommu/amd: Add device errata handling iommu/amd: Add function to get IOMMUv2 domain for pdev iommu/amd: Implement function to send PPR completions iommu/amd: Implement functions to manage GCR3 table iommu/amd: Implement IOMMUv2 TLB flushing routines iommu/amd: Add support for IOMMUv2 domain mode iommu/amd: Add amd_iommu_domain_direct_map function ...
2012-01-10Merge branch 'kvm-updates/3.3' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds1-3/+0
* 'kvm-updates/3.3' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (74 commits) KVM: PPC: Whitespace fix for kvm.h KVM: Fix whitespace in kvm_para.h KVM: PPC: annotate kvm_rma_init as __init KVM: x86 emulator: implement RDPMC (0F 33) KVM: x86 emulator: fix RDPMC privilege check KVM: Expose the architectural performance monitoring CPUID leaf KVM: VMX: Intercept RDPMC KVM: SVM: Intercept RDPMC KVM: Add generic RDPMC support KVM: Expose a version 2 architectural PMU to a guests KVM: Expose kvm_lapic_local_deliver() KVM: x86 emulator: Use opcode::execute for Group 9 instruction KVM: x86 emulator: Use opcode::execute for Group 4/5 instructions KVM: x86 emulator: Use opcode::execute for Group 1A instruction KVM: ensure that debugfs entries have been created KVM: drop bsp_vcpu pointer from kvm struct KVM: x86: Consolidate PIT legacy test KVM: x86: Do not rely on implicit inclusions KVM: Make KVM_INTEL depend on CPU_SUP_INTEL KVM: Use memdup_user instead of kmalloc/copy_from_user ...
2012-01-10Merge branch 'usb-next' of ↵Linus Torvalds1-0/+4
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb * 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (232 commits) USB: Add USB-ID for Multiplex RC serial adapter to cp210x.c xhci: Clean up 32-bit build warnings. USB: update documentation for usbmon usb: usb-storage doesn't support dynamic id currently, the patch disables the feature to fix an oops drivers/usb/class/cdc-acm.c: clear dangling pointer drivers/usb/dwc3/dwc3-pci.c: introduce missing kfree drivers/usb/host/isp1760-if.c: introduce missing kfree usb: option: add ZD Incorporated HSPA modem usb: ch9: fix up MaxStreams helper USB: usb-skeleton.c: cleanup open_count USB: usb-skeleton.c: fix open/disconnect race xhci: Properly handle COMP_2ND_BW_ERR USB: remove dead code from suspend/resume path USB: add quirk for another camera drivers: usb: wusbcore: Fix dependency for USB_WUSB xhci: Better debugging for critical host errors. xhci: Be less verbose during URB cancellation. xhci: Remove debugging about ring structure allocation. xhci: Remove debugging about toggling cycle bits. xhci: Remove debugging for individual transfers. ...
2012-01-09NFSv4: Change the default setting of the nfs4_disable_idmapping parameterTrond Myklebust1-6/+11
Now that the use of numeric uids/gids is officially sanctioned in RFC3530bis, it is time to change the default here to 'enabled'. By doing so, we ensure that NFSv4 copies the behaviour of NFSv3 when we're using the default AUTH_SYS authentication (i.e. when the client uses the numeric uids/gids as authentication tokens), so that when new files are created, they will appear to have the correct user/group. It also fixes a number of backward compatibility issues when migrating from NFSv3 to NFSv4 on a platform where the server uses different uid/gid mappings than the client. Note also that this setting has been successfully tested against servers that do not support numeric uids/gids at several Connectathon/Bakeathon events at this point, and the fall back to using string names/groups has been shown to work well in all those test cases. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-09Merge branches 'iommu/page-sizes' and 'iommu/group-id' into nextJoerg Roedel1-1/+3
Conflicts: drivers/iommu/amd_iommu.c drivers/iommu/intel-iommu.c include/linux/iommu.h
2012-01-08Merge branch 'tip/perf/core' of ↵Ingo Molnar1-0/+8
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace into perf/core
2012-01-07Merge branch 'x86-asm-for-linus' of ↵Linus Torvalds1-4/+3
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip * 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (21 commits) x86: Fix atomic64_xxx_cx8() functions x86: Fix and improve cmpxchg_double{,_local}() x86_64, asm: Optimise fls(), ffs() and fls64() x86, bitops: Move fls64.h inside __KERNEL__ x86: Fix and improve percpu_cmpxchg{8,16}b_double() x86: Report cpb and eff_freq_ro flags correctly x86/i386: Use less assembly in strlen(), speed things up a bit x86: Use the same node_distance for 32 and 64-bit x86: Fix rflags in FAKE_STACK_FRAME x86: Clean up and extend do_int3() x86: Call do_notify_resume() with interrupts enabled x86/div64: Add a micro-optimization shortcut if base is power of two x86-64: Cleanup some assembly entry points x86-64: Slightly shorten line system call entry and exit paths x86-64: Reduce amount of redundant code generated for invalidate_interruptNN x86-64: Slightly shorten int_ret_from_sys_call x86, efi: Convert efi_phys_get_time() args to physical addresses x86: Default to vsyscall=emulate x86-64: Set siginfo and context on vsyscall emulation faults x86: consolidate xchg and xadd macros ...
2012-01-04Merge commit 'v3.2-rc7' into x86/asmIngo Molnar1-3/+3
Merge reason: Update from -rc4 to -rc7. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-12-27Merge remote-tracking branch 'tip/perf/core' into kvm-updates/3.3Avi Kivity1-0/+3
* tip/perf/core: (66 commits) perf, x86: Expose perf capability to other modules perf, x86: Implement arch event mask as quirk x86, perf: Disable non available architectural events jump_label: Provide jump_label_key initializers jump_label, x86: Fix section mismatch perf, core: Rate limit perf_sched_events jump_label patching perf: Fix enable_on_exec for sibling events perf: Remove superfluous arguments perf, x86: Prefer fixed-purpose counters when scheduling perf, x86: Fix event scheduler for constraints with overlapping counters perf, x86: Implement event scheduler helper functions perf: Avoid a useless pmu_disable() in the perf-tick x86/tools: Add decoded instruction dump mode x86: Update instruction decoder to support new AVX formats x86/tools: Fix insn_sanity message outputs x86/tools: Fix instruction decoder message output x86: Fix instruction decoder to handle grouped AVX instructions x86/tools: Fix Makefile to build all test tools perf test: Soft errors shouldn't stop the "Validate PERF_RECORD_" test perf test: Validate PERF_RECORD_ events and perf_sample fields ... Signed-off-by: Avi Kivity <avi@redhat.com> * commit 'b3d9468a8bd218a695e3a0ff112cd4efd27b670a': (66 commits) perf, x86: Expose perf capability to other modules perf, x86: Implement arch event mask as quirk x86, perf: Disable non available architectural events jump_label: Provide jump_label_key initializers jump_label, x86: Fix section mismatch perf, core: Rate limit perf_sched_events jump_label patching perf: Fix enable_on_exec for sibling events perf: Remove superfluous arguments perf, x86: Prefer fixed-purpose counters when scheduling perf, x86: Fix event scheduler for constraints with overlapping counters perf, x86: Implement event scheduler helper functions perf: Avoid a useless pmu_disable() in the perf-tick x86/tools: Add decoded instruction dump mode x86: Update instruction decoder to support new AVX formats x86/tools: Fix insn_sanity message outputs x86/tools: Fix instruction decoder message output x86: Fix instruction decoder to handle grouped AVX instructions x86/tools: Fix Makefile to build all test tools perf test: Soft errors shouldn't stop the "Validate PERF_RECORD_" test perf test: Validate PERF_RECORD_ events and perf_sample fields ...
2011-12-27KVM: MMU: remove oos_shadow parameterXiao Guangrong1-3/+0
The unsync code should be stable now, maybe it is the time to remove this parameter to cleanup the code a little bit Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-12-21tracing: Have stack tracing set filtered functions at bootSteven Rostedt1-0/+8
Add stacktrace_filter= to the kernel command line that lets the user pick specific functions to check the stack on. Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2011-12-20Merge commit 'v3.2-rc6' into perf/coreIngo Molnar1-3/+3
Merge reason: Update with the latest fixes. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-12-20Merge branch 'for-tip' of ↵Ingo Molnar1-0/+2
git://git.kernel.org/pub/scm/linux/kernel/git/rric/oprofile into perf/core
2011-12-13Merge branch 'for-next/dwc3' of ↵Greg Kroah-Hartman1-3/+3
git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next * 'for-next/dwc3' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb: (392 commits) usb: dwc3: ep0: fix for possible early delayed_status usb: dwc3: gadget: fix stream enable bit usb: dwc3: ep0: fix GetStatus handling (again) usb: dwc3: ep0: use dwc3_request for ep0 requsts instead of usb_request usb: dwc3: use correct hwparam register for power mgm check usb: dwc3: omap: move to module_platform_driver usb: dwc3: workaround: missing disconnect event usb: dwc3: workaround: missing USB3 Reset event usb: dwc3: workaround: U1/U2 -> U0 transiton usb: dwc3: gadget: return early in dwc3_cleanup_done_reqs() usb: dwc3: ep0: handle delayed_status again usb: dwc3: ep0: push ep0state into xfernotready processing usb: dwc3: fix sparse errors usb: dwc3: fix few coding style problems usb: dwc3: move generic dwc3 code from gadget into core usb: dwc3: use a helper function for operation mode setting usb: dwc3: ep0: don't use ep0in for transfers usb: dwc3: ep0: use proper endianess in SetFeature for wIndex usb: dwc3: core: drop DWC3_EVENT_BUFFERS_MAX usb: dwc3: omap: add multiple instances support to OMAP ...
2011-12-12iommu/amd: Put IOMMUv2 capable devices in pt_domainJoerg Roedel1-0/+5
If the device starts to use IOMMUv2 features the dma handles need to stay valid. The only sane way to do this is to use a identity mapping for the device and not translate it by the iommu. This is implemented with this patch. Since this lifts the device-isolation there is also a new kernel parameter which allows to disable that feature. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-12-09Merge branch 'iommu/fixes' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu * 'iommu/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: MAINTAINERS: Update amd-iommu F: patterns iommu/amd: Fix typo in kernel-parameters.txt iommu/msm: Fix compile error in mach-msm/devices-iommu.c Fix comparison using wrong pointer variable in dma debug code
2011-12-07oprofile, s390: Add event interface to the System z hardware sampling moduleAndreas Krebbel1-0/+2
With this patch the OProfile Basic Mode Sampling support for System z is enhanced with a counter file system. That way hardware sampling can be configured using the user space tools with only little modifications. With the patch by default new cpu_types (s390/z10, s390/z196) are returned in order to indicate that we are running a CPU which provides the hardware sampling facility. Existing user space tools will complain about an unknown cpu type. In order to be compatible with existing user space tools the `cpu_type' module parameter has been added. Setting the parameter to `timer' will force the module to return `timer' as cpu_type. The module will still try to use hardware sampling if available and the hwsampling virtual filesystem will be also be available for configuration. So this has a different effect than using the generic oprofile module parameter `timer=1'. If the basic mode sampling is enabled on the machine and the cpu_type=timer parameter is not used the kernel module will provide the following virtual filesystem: /dev/oprofile/0/enabled /dev/oprofile/0/event /dev/oprofile/0/count /dev/oprofile/0/unit_mask /dev/oprofile/0/kernel /dev/oprofile/0/user In the counter file system only the values of 'enabled', 'count', 'kernel', and 'user' are evaluated by the kernel module. Everything else must contain fixed values. The 'event' value only supports a single event - HWSAMPLING with value 0. The 'count' value specifies the hardware sampling rate as it is passed to the CPU measurement facility. The 'kernel' and 'user' flags can now be used to filter for samples when using hardware sampling. Additionally also the following file will be created: /dev/oprofile/timer/enabled This will always be the inverted value of /dev/oprofile/0/enabled. 0 is not accepted without hardware sampling. Signed-off-by: Andreas Krebbel <krebbel@linux.vnet.ibm.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
2011-12-06iommu/amd: Fix typo in kernel-parameters.txtSedat Dilek1-1/+1
Signed-off-by: Sedat Dilek <sedat.dilek@gmail.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-12-05x86, AMD: Correct align_va_addr documentationBorislav Petkov1-2/+2
Commit dfb09f9b7ab0 ("x86, amd: Avoid cache aliasing penalties on AMD family 15h") introduced a kernel command line parameter called 'align_va_addr' which still refers to arguments used in an earlier version of the patch and which got changed without updating the documentation. Correct that omission. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com> Cc: Frank Arnold <frank.arnold@amd.com> Link: http://lkml.kernel.org/r/1321873819-29541-1-git-send-email-bp@amd64.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-12-05x86: Default to vsyscall=emulateAndy Lutomirski1-4/+3
This essentially reverts: 2b666859ec32: x86: Default to vsyscall=native for now The ABI breakage should now be fixed by: commit 48c4206f5b02f28c4c78a1f5b491d3772fb64fb9 Author: Andy Lutomirski <luto@mit.edu> Date: Thu Oct 20 08:48:19 2011 -0700 x86-64: Set siginfo and context on vsyscall emulation faults Signed-off-by: Andy Lutomirski <luto@amacapital.net> Cc: richard -rw- weinberger <richard.weinberger@gmail.com> Cc: Adrian Bunk <bunk@stusta.de> Cc: H. Peter Anvin <hpa@linux.intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: http://lkml.kernel.org/r/93154af3b2b6d208906ae02d80d92cf60c6fa94f.1320712291.git.luto@amacapital.net Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-12-05x86, NMI: Add knob to disable using NMI IPIs to stop cpusDon Zickus1-0/+4
Some machines may exhibit problems using the NMI to stop other cpus. This knob just allows one to revert back to the original behaviour to help diagnose the problem. V2: make function static Signed-off-by: Don Zickus <dzickus@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Robert Richter <robert.richter@amd.com> Cc: seiji.aguchi@hds.com Cc: vgoyal@redhat.com Cc: mjg@redhat.com Cc: tony.luck@intel.com Cc: gong.chen@intel.com Cc: satoru.moriya@hds.com Cc: avi@redhat.com Cc: Andi Kleen <andi@firstfloor.org> Link: http://lkml.kernel.org/r/1318533267-18880-4-git-send-email-dzickus@redhat.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-11-18USB: make the usbfs memory limit configurableAlan Stern1-0/+4
The 16-MB global limit on memory used by usbfs isn't suitable for all people. It's a reasonable default, but there are applications (especially for SuperSpeed devices) that need a lot more. This patch (as1498) creates a writable module parameter for usbcore to control the global limit. The default is still 16 MB, but users can change it at runtime, even after usbcore has been loaded. As a special case, setting the value to 0 is treated the same as the hard limit of 2047 MB. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-11-15iommu: Add option to group multi-function devicesAlex Williamson1-1/+3
The option iommu=group_mf indicates the that the iommu driver should expose all functions of a multi-function PCI device as the same iommu_device_group. This is useful for disallowing individual functions being exposed as independent devices to userspace as there are often hidden dependencies. Virtual functions are not affected by this option. Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-11-15Merge branch 'core' of git://amd64.org/linux/rric into perf/coreIngo Molnar1-0/+3
2011-11-10slab: introduce slab_max_order kernel parameterDavid Rientjes1-0/+6
Introduce new slab_max_order kernel parameter which is the equivalent of slub_max_order. For immediate purposes, allows users to override the heuristic that sets the max order to 1 by default if they have more than 32MB of RAM. This may result in page allocation failures if there is substantial fragmentation. Another usecase would be to increase the max order for better performance. Acked-by: Christoph Lameter <cl@linux.com> Signed-off-by: David Rientjes <rientjes@google.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
2011-11-04oprofile, x86: Add kernel parameter oprofile.cpu_type=timerRobert Richter1-0/+3
We need this to better test x86 NMI timer mode. Otherwise it is very hard to setup systems with NMI timer enabled, but we have this e.g. in virtual machine environments. Signed-off-by: Robert Richter <robert.richter@amd.com>
2011-11-01Merge branch 'akpm' (Andrew's incoming)Linus Torvalds1-0/+8
Quoth Andrew: - Most of MM. Still waiting for the poweroc guys to get off their butts and review some threaded hugepages patches. - alpha - vfs bits - drivers/misc - a few core kerenl tweaks - printk() features - MAINTAINERS updates - backlight merge - leds merge - various lib/ updates - checkpatch updates * akpm: (127 commits) epoll: fix spurious lockdep warnings checkpatch: add a --strict check for utf-8 in commit logs kernel.h/checkpatch: mark strict_strto<foo> and simple_strto<foo> as obsolete llist-return-whether-list-is-empty-before-adding-in-llist_add-fix wireless: at76c50x: follow rename pack_hex_byte to hex_byte_pack fat: follow rename pack_hex_byte() to hex_byte_pack() security: follow rename pack_hex_byte() to hex_byte_pack() kgdb: follow rename pack_hex_byte() to hex_byte_pack() lib: rename pack_hex_byte() to hex_byte_pack() lib/string.c: fix strim() semantics for strings that have only blanks lib/idr.c: fix comment for ida_get_new_above() lib/percpu_counter.c: enclose hotplug only variables in hotplug ifdef lib/bitmap.c: quiet sparse noise about address space lib/spinlock_debug.c: print owner on spinlock lockup lib/kstrtox: common code between kstrto*() and simple_strto*() functions drivers/leds/leds-lp5521.c: check if reset is successful leds: turn the blink_timer off before starting to blink leds: save the delay values after a successful call to blink_set() drivers/leds/leds-gpio.c: use gpio_get_value_cansleep() when initializing drivers/leds/leds-lm3530.c: add __devexit_p where needed ...
2011-11-01printk: add console_suspend module parameterYanmin Zhang1-0/+5
We are enabling some power features on medfield. To test suspend-2-RAM conveniently, we need turn on/off console_suspend_enabled frequently. Add a module parameter, so users could change it by: /sys/module/printk/parameters/console_suspend Signed-off-by: Yanmin Zhang <yanmin_zhang@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-11-01printk: add module parameter ignore_loglevel to control ignore_loglevelYanmin Zhang1-0/+3
We are enabling some power features on medfield. To test suspend-2-RAM conveniently, we need turn on/off ignore_loglevel frequently without rebooting. Add a module parameter, so users can change it by: /sys/module/printk/parameters/ignore_loglevel Signed-off-by: Yanmin Zhang <yanmin.zhang@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-11-01Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6Linus Torvalds1-3/+3
* '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 ...
2011-10-31Merge branch 'kvm-updates/3.2' of ↵Linus Torvalds1-0/+4
git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm * 'kvm-updates/3.2' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm: (75 commits) KVM: SVM: Keep intercepting task switching with NPT enabled KVM: s390: implement sigp external call KVM: s390: fix register setting KVM: s390: fix return value of kvm_arch_init_vm KVM: s390: check cpu_id prior to using it KVM: emulate lapic tsc deadline timer for guest x86: TSC deadline definitions KVM: Fix simultaneous NMIs KVM: x86 emulator: convert push %sreg/pop %sreg to direct decode KVM: x86 emulator: switch lds/les/lss/lfs/lgs to direct decode KVM: x86 emulator: streamline decode of segment registers KVM: x86 emulator: simplify OpMem64 decode KVM: x86 emulator: switch src decode to decode_operand() KVM: x86 emulator: qualify OpReg inhibit_byte_regs hack KVM: x86 emulator: switch OpImmUByte decode to decode_imm() KVM: x86 emulator: free up some flag bits near src, dst KVM: x86 emulator: switch src2 to generic decode_operand() KVM: x86 emulator: expand decode flags to 64 bits KVM: x86 emulator: split dst decode to a generic decode_operand() KVM: x86 emulator: move memop, memopp into emulation context ...
2011-10-30[S390] kdump: Add size to elfcorehdr kernel parameterMichael Holzheu1-3/+3
Currently only the address of the pre-allocated ELF header is passed with the elfcorehdr= kernel parameter. In order to reserve memory for the header in the 2nd kernel also the size is required. Current kdump architecture backends use different methods to do that, e.g. x86 uses the memmap= kernel parameter. On s390 there is no easy way to transfer this information. Therefore the elfcorehdr kernel parameter is extended to also pass the size. This now can also be used as standard mechanism by all future kdump architecture backends. The syntax of the kernel parameter is extended as follows: elfcorehdr=[size[KMG]@]offset[KMG] This change is backward compatible because elfcorehdr=size is still allowed. Acked-by: Vivek Goyal <vgoyal@redhat.com> Acked-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-10-28Merge branch 'x86-rdrand-for-linus' of ↵Linus Torvalds1-0/+5
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip * 'x86-rdrand-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86, random: Verify RDRAND functionality and allow it to be disabled x86, random: Architectural inlines to get random integers with RDRAND random: Add support for architectural random hooks Fix up trivial conflicts in drivers/char/random.c: the architectural random hooks touched "get_random_int()" that was simplified to use MD5 and not do the keyptr thing any more (see commit 6e5714eaf77d: "net: Compute protocol sequence numbers and fragment IDs using MD5").
2011-10-28Merge branch 'x86-cpu-for-linus' of ↵Linus Torvalds1-0/+13
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip * 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86, amd: Include linux/elf.h since we use stuff from asm/elf.h x86: cache_info: Update calculation of AMD L3 cache indices x86: cache_info: Kill the atomic allocation in amd_init_l3_cache() x86: cache_info: Kill the moronic shadow struct x86: cache_info: Remove bogus free of amd_l3_cache data x86, amd: Include elf.h explicitly, prepare the code for the module.h split x86-32, amd: Move va_align definition to unbreak 32-bit build x86, amd: Move BSP code to cpu_dev helper x86: Add a BSP cpu_dev helper x86, amd: Avoid cache aliasing penalties on AMD family 15h
2011-10-26Merge branch 'core-iommu-for-linus' of ↵Linus Torvalds1-1/+2
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip * 'core-iommu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86, ioapic: Consolidate the explicit EOI code x86, ioapic: Restore the mask bit correctly in eoi_ioapic_irq() x86, kdump, ioapic: Reset remote-IRR in clear_IO_APIC iommu: Rename the DMAR and INTR_REMAP config options x86, ioapic: Define irq_remap_modify_chip_defaults() x86, msi, intr-remap: Use the ioapic set affinity routine iommu: Cleanup ifdefs in detect_intel_iommu() iommu: No need to set dmar_disabled in check_zero_address() iommu: Move IOMMU specific code to intel-iommu.c intr_remap: Call dmar_dev_scope_init() explicitly x86, x2apic: Enable the bios request for x2apic optout
2011-10-25Merge branch 'pm-for-linus' of ↵Linus Torvalds1-0/+7
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm * 'pm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (63 commits) PM / Clocks: Remove redundant NULL checks before kfree() PM / Documentation: Update docs about suspend and CPU hotplug ACPI / PM: Add Sony VGN-FW21E to nonvs blacklist. ARM: mach-shmobile: sh7372 A4R support (v4) ARM: mach-shmobile: sh7372 A3SP support (v4) PM / Sleep: Mark devices involved in wakeup signaling during suspend PM / Hibernate: Improve performance of LZO/plain hibernation, checksum image PM / Hibernate: Do not initialize static and extern variables to 0 PM / Freezer: Make fake_signal_wake_up() wake TASK_KILLABLE tasks too PM / Hibernate: Add resumedelay kernel param in addition to resumewait MAINTAINERS: Update linux-pm list address PM / ACPI: Blacklist Vaio VGN-FW520F machine known to require acpi_sleep=nonvs PM / ACPI: Blacklist Sony Vaio known to require acpi_sleep=nonvs PM / Hibernate: Add resumewait param to support MMC-like devices as resume file PM / Hibernate: Fix typo in a kerneldoc comment PM / Hibernate: Freeze kernel threads after preallocating memory PM: Update the policy on default wakeup settings PM / VT: Cleanup #if defined uglyness and fix compile error PM / Suspend: Off by one in pm_suspend() PM / Hibernate: Include storage keys in hibernation image on s390 ...
2011-10-25Merge branch 'for-linus' of ↵Linus Torvalds1-6/+6
git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (59 commits) MAINTAINERS: linux-m32r is moderated for non-subscribers linux@lists.openrisc.net is moderated for non-subscribers Drop default from "DM365 codec select" choice parisc: Kconfig: cleanup Kernel page size default Kconfig: remove redundant CONFIG_ prefix on two symbols cris: remove arch/cris/arch-v32/lib/nand_init.S microblaze: add missing CONFIG_ prefixes h8300: drop puzzling Kconfig dependencies MAINTAINERS: microblaze-uclinux@itee.uq.edu.au is moderated for non-subscribers tty: drop superfluous dependency in Kconfig ARM: mxc: fix Kconfig typo 'i.MX51' Fix file references in Kconfig files aic7xxx: fix Kconfig references to READMEs Fix file references in drivers/ide/ thinkpad_acpi: Fix printk typo 'bluestooth' bcmring: drop commented out line in Kconfig btmrvl_sdio: fix typo 'btmrvl_sdio_sd6888' doc: raw1394: Trivial typo fix CIFS: Don't free volume_info->UNC until we are entirely done with it. treewide: Correct spelling of successfully in comments ...
2011-10-25Merge branch 'next' of git://selinuxproject.org/~jmorris/linux-securityLinus Torvalds1-0/+6
* 'next' of git://selinuxproject.org/~jmorris/linux-security: (95 commits) TOMOYO: Fix incomplete read after seek. Smack: allow to access /smack/access as normal user TOMOYO: Fix unused kernel config option. Smack: fix: invalid length set for the result of /smack/access Smack: compilation fix Smack: fix for /smack/access output, use string instead of byte Smack: domain transition protections (v3) Smack: Provide information for UDS getsockopt(SO_PEERCRED) Smack: Clean up comments Smack: Repair processing of fcntl Smack: Rule list lookup performance Smack: check permissions from user space (v2) TOMOYO: Fix quota and garbage collector. TOMOYO: Remove redundant tasklist_lock. TOMOYO: Fix domain transition failure warning. TOMOYO: Remove tomoyo_policy_memory_lock spinlock. TOMOYO: Simplify garbage collector. TOMOYO: Fix make namespacecheck warnings. target: check hex2bin result encrypted-keys: check hex2bin result ...
2011-10-17PM / Hibernate: Add resumedelay kernel param in addition to resumewaitBarry Song1-0/+3
Patch "PM / Hibernate: Add resumewait param to support MMC-like devices as resume file" added the resumewait kernel command line option. The present patch adds resumedelay so that resumewait/delay were analogous to rootwait/delay. [rjw: Modified the subject and changelog slightly.] Signed-off-by: Barry Song <baohua.song@csr.com> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
2011-10-17PM / Hibernate: Add resumewait param to support MMC-like devices as resume fileBarry Song1-0/+4
Some devices like MMC are async detected very slow. For example, drivers/mmc/host/sdhci.c launches a 200ms delayed work to detect MMC partitions then add disk. We have wait_for_device_probe() and scsi_complete_async_scans() before calling swsusp_check(), but it is not enough to wait for MMC. This patch adds resumewait kernel param just like rootwait so that we have enough time to wait until MMC is ready. The difference is that we wait for resume partition whereas rootwait waits for rootfs partition (which may be on a different device). This patch will make hibernation support many embedded products without SCSI devices, but with devices like MMC. [rjw: Modified the changelog slightly.] Signed-off-by: Barry Song <Baohua.Song@csr.com> Reviewed-by: Valdis Kletnieks <valdis.kletnieks@vt.edu> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
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