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2014-04-09arch/powerpc: Use RCU_INIT_POINTER(x, NULL) in platforms/cell/spu_syscalls.cMonam Agarwal1-1/+1
Here rcu_assign_pointer() is ensuring that the initialization of a structure is carried out before storing a pointer to that structure. So, rcu_assign_pointer(p, NULL) can always safely be converted to RCU_INIT_POINTER(p, NULL). Signed-off-by: Monam Agarwal <monamagarwal123@gmail.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-04-09powerpc/opal: Add missing includeMichael Neuling1-0/+2
next-20140324 currently fails compiling celleb_defconfig with: arch/powerpc/include/asm/opal.h:894:42: error: 'struct notifier_block' declared inside parameter list [-Werror] arch/powerpc/include/asm/opal.h:894:42: error: its scope is only this definition or declaration, which is probably not what you want [-Werror] arch/powerpc/include/asm/opal.h:896:14: error: 'struct notifier_block' declared inside parameter list [-Werror] This is due to a missing include which is added here. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-04-09powerpc: Convert last uses of __FUNCTION__ to __func__Joe Perches1-6/+5
Just about all of these have been converted to __func__, so convert the last uses. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-04-09powerpc: Add lq/stq emulationAnton Blanchard3-8/+46
Recent CPUs support quad word load and store instructions. Add support to the alignment handler for them. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-04-09powerpc/powernv: Add invalid OPAL callJoel Stanley3-0/+6
This call will not be understood by OPAL, and cause it to add an error to it's log. Among other things, this is useful for testing the behaviour of the log as it fills up. Signed-off-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-04-09powerpc/powernv: Add OPAL message log interfaceJoel Stanley4-1/+128
OPAL provides an in-memory circular buffer containing a message log populated with various runtime messages produced by the firmware. Provide a sysfs interface /sys/firmware/opal/msglog for userspace to view the messages. Signed-off-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-04-09powerpc/book3s: Fix mc_recoverable_range buffer overrun issue.Mahesh Salgaonkar1-8/+20
Currently we wrongly allocate mc_recoverable_range buffer (to hold recoverable ranges) based on size of the property "mcheck-recoverable-ranges". This results in allocating less memory to hold available recoverable range entries from /proc/device-tree/ibm,opal/mcheck-recoverable-ranges. This patch fixes this issue by allocating mc_recoverable_range buffer based on number of entries of recoverable ranges instead of device property size. Without this change we end up allocating less memory and run into memory corruption issue. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-04-09powerpc: Remove dead code in sycall entryMichael Neuling1-8/+0
In: commit 742415d6b66bf09e3e73280178ef7ec85c90b7ee Author: Michael Neuling <mikey@neuling.org> powerpc: Turn syscall handler into macros We converted the syscall entry code onto macros, but in doing this we introduced some cruft that's never run and should never have been added. This removes that code. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-04-09powerpc: Use of_node_init() for the fakenode in msi_bitmap.cLi Zhong1-1/+1
This patch uses of_node_init() to initialize the kobject in the fake node used in test_of_node(), to avoid following kobject warning. [ 0.897654] kobject: '(null)' (c0000007ca183a08): is not initialized, yet kobject_put() is being called. [ 0.897682] ------------[ cut here ]------------ [ 0.897688] WARNING: at lib/kobject.c:670 [ 0.897692] Modules linked in: [ 0.897701] CPU: 4 PID: 1 Comm: swapper/0 Not tainted 3.14.0+ #1 [ 0.897708] task: c0000007ca100000 ti: c0000007ca180000 task.ti: c0000007ca180000 [ 0.897715] NIP: c00000000046a1f0 LR: c00000000046a1ec CTR: 0000000001704660 [ 0.897721] REGS: c0000007ca1835c0 TRAP: 0700 Not tainted (3.14.0+) [ 0.897727] MSR: 8000000000029032 <SF,EE,ME,IR,DR,RI> CR: 28000024 XER: 0000000d [ 0.897749] CFAR: c0000000008ef4ec SOFTE: 1 GPR00: c00000000046a1ec c0000007ca183840 c0000000014c59b8 000000000000005c GPR04: 0000000000000001 c000000000129770 0000000000000000 0000000000000001 GPR08: 0000000000000000 0000000000000000 0000000000000000 0000000000003fef GPR12: 0000000000000000 c00000000f221200 c00000000000c350 0000000000000000 GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 GPR20: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 GPR24: 0000000000000000 c00000000144e808 c000000000c56f20 00000000000000d8 GPR28: c000000000cd5058 0000000000000000 c000000001454ca8 c0000007ca183a08 [ 0.897856] NIP [c00000000046a1f0] .kobject_put+0xa0/0xb0 [ 0.897863] LR [c00000000046a1ec] .kobject_put+0x9c/0xb0 [ 0.897868] Call Trace: [ 0.897874] [c0000007ca183840] [c00000000046a1ec] .kobject_put+0x9c/0xb0 (unreliable) [ 0.897885] [c0000007ca1838c0] [c000000000743f9c] .of_node_put+0x2c/0x50 [ 0.897894] [c0000007ca183940] [c000000000c83954] .test_of_node+0x1dc/0x208 [ 0.897902] [c0000007ca183b80] [c000000000c839a4] .msi_bitmap_selftest+0x24/0x38 [ 0.897913] [c0000007ca183bf0] [c00000000000bb34] .do_one_initcall+0x144/0x200 [ 0.897922] [c0000007ca183ce0] [c000000000c748e4] .kernel_init_freeable+0x2b4/0x394 [ 0.897931] [c0000007ca183db0] [c00000000000c374] .kernel_init+0x24/0x130 [ 0.897940] [c0000007ca183e30] [c00000000000a2f4] .ret_from_kernel_thread+0x5c/0x68 [ 0.897947] Instruction dump: [ 0.897952] 7fe3fb78 38210080 e8010010 ebe1fff8 7c0803a6 4800014c e89f0000 3c62ff6e [ 0.897971] 7fe5fb78 3863a950 48485279 60000000 <0fe00000> 39000000 393f0038 4bffff80 [ 0.897992] ---[ end trace 1eeffdb9f825a556 ]--- Signed-off-by: Li Zhong <zhong@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-04-09powerpc/mm: NUMA pte should be handled via slow path in get_user_pages_fast()Aneesh Kumar K.V1-0/+13
We need to handle numa pte via the slow path Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-04-09powerpc/powernv: Fix endian issues with sensor codeAnton Blanchard2-3/+4
One OPAL call and one device tree property needed byte swapping. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-04-07powerpc/powernv: Fix endian issues with OPAL async codeAnton Blanchard5-13/+16
OPAL defines opal_msg as a big endian struct so we have to byte swap it on little endian builds. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-04-07powerpc/powernv: Add opal_notifier_unregister() and export to modulesBenjamin Herrenschmidt2-0/+16
opal_notifier_register() is missing a pending "unregister" variant and should be exposed to modules. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-04-07powerpc/ppc64: Do not turn AIL (reloc-on interrupts) too earlyBenjamin Herrenschmidt2-5/+15
Turn them on at the same time as we allow MSR_IR/DR in the paca kernel MSR, ie, after the MMU has been setup enough to be able to handle relocated access to the linear mapping. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-04-07powerpc/ppc64: Gracefully handle early interruptsBenjamin Herrenschmidt2-1/+17
If we take an interrupt such as a trap caused by a BUG_ON before the MMU has been setup, the interrupt handlers try to enable virutal mode and cause a recursive crash, making the original problem very hard to debug. This fixes it by adjusting the "kernel_msr" value in the PACA so that it only has MSR_IR and MSR_DR (translation for instruction and data) set after the MMU has been initialized for the processor. We may still not have a console yet but at least we don't get into a recursive fault (and early debug console or memory dump via JTAG of the kernel buffer *will* give us the proper error). Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-04-07powerpc/prom: early_init_dt_scan_cpus() updates cpu features only onceBenjamin Herrenschmidt1-26/+26
All our cpu feature updates were done for every CPU in the device-tree, thus overwriting the cputable bits over and over again. Instead do them only for the boot CPU. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-04-07powerpc: Make boot_cpuid common between 32 and 64-bitBenjamin Herrenschmidt4-3/+7
Move the definition to setup-common.c and set the init value to -1 on both 32 and 64-bit (it was 0 on 64-bit). Additionally add a check to prom.c to garantee that the init value has been udpated after the DT scan. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-04-07powerpc: Adjust CPU_FTR_SMT on all platformsBenjamin Herrenschmidt1-1/+1
For historical reasons that code was under #ifdef CONFIG_PPC_PSERIES but it applies equally to all 64-bit platforms. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-04-07powerpc/tm: Disable IRQ in tm_recheckpointMichael Neuling4-7/+33
We can't take an IRQ when we're about to do a trechkpt as our GPR state is set to user GPR values. We've hit this when running some IBM Java stress tests in the lab resulting in the following dump: cpu 0x3f: Vector: 700 (Program Check) at [c000000007eb3d40] pc: c000000000050074: restore_gprs+0xc0/0x148 lr: 00000000b52a8184 sp: ac57d360 msr: 8000000100201030 current = 0xc00000002c500000 paca = 0xc000000007dbfc00 softe: 0 irq_happened: 0x00 pid = 34535, comm = Pooled Thread # R00 = 00000000b52a8184 R16 = 00000000b3e48fda R01 = 00000000ac57d360 R17 = 00000000ade79bd8 R02 = 00000000ac586930 R18 = 000000000fac9bcc R03 = 00000000ade60000 R19 = 00000000ac57f930 R04 = 00000000f6624918 R20 = 00000000ade79be8 R05 = 00000000f663f238 R21 = 00000000ac218a54 R06 = 0000000000000002 R22 = 000000000f956280 R07 = 0000000000000008 R23 = 000000000000007e R08 = 000000000000000a R24 = 000000000000000c R09 = 00000000b6e69160 R25 = 00000000b424cf00 R10 = 0000000000000181 R26 = 00000000f66256d4 R11 = 000000000f365ec0 R27 = 00000000b6fdcdd0 R12 = 00000000f66400f0 R28 = 0000000000000001 R13 = 00000000ada71900 R29 = 00000000ade5a300 R14 = 00000000ac2185a8 R30 = 00000000f663f238 R15 = 0000000000000004 R31 = 00000000f6624918 pc = c000000000050074 restore_gprs+0xc0/0x148 cfar= c00000000004fe28 dont_restore_vec+0x1c/0x1a4 lr = 00000000b52a8184 msr = 8000000100201030 cr = 24804888 ctr = 0000000000000000 xer = 0000000000000000 trap = 700 This moves tm_recheckpoint to a C function and moves the tm_restore_sprs into that function. It then adds IRQ disabling over the trechkpt critical section. It also sets the TEXASR FS in the signals code to ensure this is never set now that we explictly write the TM sprs in tm_recheckpoint. Signed-off-by: Michael Neuling <mikey@neuling.org> cc: stable@vger.kernel.org Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-04-07powerpc/le: Enable RTAS events supportGreg Kurz5-61/+128
The current kernel code assumes big endian and parses RTAS events all wrong. The most visible effect is that we cannot honor EPOW events, meaning, for example, we cannot shut down a guest properly from the hypervisor. This new patch is largely inspired by Nathan's work: we get rid of all the bit fields in the RTAS event structures (even the unused ones, for consistency). We also introduce endian safe accessors for the fields used by the kernel (trivial rtas_error_type() accessor added for consistency). Cc: Nathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-04-07powerpc: Correct emulated mtfsf instructionStephen Chivers1-35/+23
The emulated (CONFIG_MATH_EMULATION_FULL) PowerPC Floating Point instruction mtfsf does not correctly copy bits from its source register to the Floating Point Status and Register (FPSCR). The error is in the preparation of the mask used to select the bits to be copied from the source to the FPSCR. Execution of the mtfsf instruction does not produce the same results on a MPC8548 platform (emulated floating point) as on MPC7410 or 440EP platforms (hardware floating point). This error has been detected using a Freescale MPC8548 based platform and the patch below tested using that platform. The patch is based on the patch(es) provided by Gabriel Paubert and analysis by Gabriel, James Yang and David Laight. Signed-off-by: Stephen Chivers <schivers@csc.com> Signed-off-by: Gabriel Paubert <paubert@iram.es> Tested-by: Stephen Chivers <schivers@csc.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-04-04Merge tag 'random_for_linus' of ↵Linus Torvalds1-0/+18
git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random Pull /dev/random changes from Ted Ts'o: "A number of cleanups plus support for the RDSEED instruction, which will be showing up in Intel Broadwell CPU's" * tag 'random_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random: random: Add arch_has_random[_seed]() random: If we have arch_get_random_seed*(), try it before blocking random: Use arch_get_random_seed*() at init time and once a second x86, random: Enable the RDSEED instruction random: use the architectural HWRNG for the SHA's IV in extract_buf() random: clarify bits/bytes in wakeup thresholds random: entropy_bytes is actually bits random: simplify accounting code random: tighten bound on random_read_wakeup_thresh random: forget lock in lockless accounting random: simplify accounting logic random: fix comment on "account" random: simplify loop in random_read random: fix description of get_random_bytes random: fix comment on proc_do_uuid random: fix typos / spelling errors in comments
2014-04-03Merge tag 'trace-3.15' of ↵Linus Torvalds1-6/+1
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace Pull tracing updates from Steven Rostedt: "Most of the changes were largely clean ups, and some documentation. But there were a few features that were added: Uprobes now work with event triggers and multi buffers and have support under ftrace and perf. The big feature is that the function tracer can now be used within the multi buffer instances. That is, you can now trace some functions in one buffer, others in another buffer, all functions in a third buffer and so on. They are basically agnostic from each other. This only works for the function tracer and not for the function graph trace, although you can have the function graph tracer running in the top level buffer (or any tracer for that matter) and have different function tracing going on in the sub buffers" * tag 'trace-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (45 commits) tracing: Add BUG_ON when stack end location is over written tracepoint: Remove unused API functions Revert "tracing: Move event storage for array from macro to standalone function" ftrace: Constify ftrace_text_reserved tracepoints: API doc update to tracepoint_probe_register() return value tracepoints: API doc update to data argument ftrace: Fix compilation warning about control_ops_free ftrace/x86: BUG when ftrace recovery fails ftrace: Warn on error when modifying ftrace function ftrace: Remove freelist from struct dyn_ftrace ftrace: Do not pass data to ftrace_dyn_arch_init ftrace: Pass retval through return in ftrace_dyn_arch_init() ftrace: Inline the code from ftrace_dyn_table_alloc() ftrace: Cleanup of global variables ftrace_new_pgs and ftrace_update_cnt tracing: Evaluate len expression only once in __dynamic_array macro tracing: Correctly expand len expressions from __dynamic_array macro tracing/module: Replace include of tracepoint.h with jump_label.h in module.h tracing: Fix event header migrate.h to include tracepoint.h tracing: Fix event header writeback.h to include tracepoint.h tracing: Warn if a tracepoint is not set via debugfs ...
2014-04-02Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-nextLinus Torvalds1-3/+4
Pull networking updates from David Miller: "Here is my initial pull request for the networking subsystem during this merge window: 1) Support for ESN in AH (RFC 4302) from Fan Du. 2) Add full kernel doc for ethtool command structures, from Ben Hutchings. 3) Add BCM7xxx PHY driver, from Florian Fainelli. 4) Export computed TCP rate information in netlink socket dumps, from Eric Dumazet. 5) Allow IPSEC SA to be dumped partially using a filter, from Nicolas Dichtel. 6) Convert many drivers to pci_enable_msix_range(), from Alexander Gordeev. 7) Record SKB timestamps more efficiently, from Eric Dumazet. 8) Switch to microsecond resolution for TCP round trip times, also from Eric Dumazet. 9) Clean up and fix 6lowpan fragmentation handling by making use of the existing inet_frag api for it's implementation. 10) Add TX grant mapping to xen-netback driver, from Zoltan Kiss. 11) Auto size SKB lengths when composing netlink messages based upon past message sizes used, from Eric Dumazet. 12) qdisc dumps can take a long time, add a cond_resched(), From Eric Dumazet. 13) Sanitize netpoll core and drivers wrt. SKB handling semantics. Get rid of never-used-in-tree netpoll RX handling. From Eric W Biederman. 14) Support inter-address-family and namespace changing in VTI tunnel driver(s). From Steffen Klassert. 15) Add Altera TSE driver, from Vince Bridgers. 16) Optimizing csum_replace2() so that it doesn't adjust the checksum by checksumming the entire header, from Eric Dumazet. 17) Expand BPF internal implementation for faster interpreting, more direct translations into JIT'd code, and much cleaner uses of BPF filtering in non-socket ocntexts. From Daniel Borkmann and Alexei Starovoitov" * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1976 commits) netpoll: Use skb_irq_freeable to make zap_completion_queue safe. net: Add a test to see if a skb is freeable in irq context qlcnic: Fix build failure due to undefined reference to `vxlan_get_rx_port' net: ptp: move PTP classifier in its own file net: sxgbe: make "core_ops" static net: sxgbe: fix logical vs bitwise operation net: sxgbe: sxgbe_mdio_register() frees the bus Call efx_set_channels() before efx->type->dimension_resources() xen-netback: disable rogue vif in kthread context net/mlx4: Set proper build dependancy with vxlan be2net: fix build dependency on VxLAN mac802154: make csma/cca parameters per-wpan mac802154: allow only one WPAN to be up at any given time net: filter: minor: fix kdoc in __sk_run_filter netlink: don't compare the nul-termination in nla_strcmp can: c_can: Avoid led toggling for every packet. can: c_can: Simplify TX interrupt cleanup can: c_can: Store dlc private can: c_can: Reduce register access can: c_can: Make the code readable ...
2014-04-02Merge tag 'kvm-3.15-1' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds13-67/+377
Pull kvm updates from Paolo Bonzini: "PPC and ARM do not have much going on this time. Most of the cool stuff, instead, is in s390 and (after a few releases) x86. ARM has some caching fixes and PPC has transactional memory support in guests. MIPS has some fixes, with more probably coming in 3.16 as QEMU will soon get support for MIPS KVM. For x86 there are optimizations for debug registers, which trigger on some Windows games, and other important fixes for Windows guests. We now expose to the guest Broadwell instruction set extensions and also Intel MPX. There's also a fix/workaround for OS X guests, nested virtualization features (preemption timer), and a couple kvmclock refinements. For s390, the main news is asynchronous page faults, together with improvements to IRQs (floating irqs and adapter irqs) that speed up virtio devices" * tag 'kvm-3.15-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (96 commits) KVM: PPC: Book3S HV: Save/restore host PMU registers that are new in POWER8 KVM: PPC: Book3S HV: Fix decrementer timeouts with non-zero TB offset KVM: PPC: Book3S HV: Don't use kvm_memslots() in real mode KVM: PPC: Book3S HV: Return ENODEV error rather than EIO KVM: PPC: Book3S: Trim top 4 bits of physical address in RTAS code KVM: PPC: Book3S HV: Add get/set_one_reg for new TM state KVM: PPC: Book3S HV: Add transactional memory support KVM: Specify byte order for KVM_EXIT_MMIO KVM: vmx: fix MPX detection KVM: PPC: Book3S HV: Fix KVM hang with CONFIG_KVM_XICS=n KVM: PPC: Book3S: Introduce hypervisor call H_GET_TCE KVM: PPC: Book3S HV: Fix incorrect userspace exit on ioeventfd write KVM: s390: clear local interrupts at cpu initial reset KVM: s390: Fix possible memory leak in SIGP functions KVM: s390: fix calculation of idle_mask array size KVM: s390: randomize sca address KVM: ioapic: reinject pending interrupts on KVM_SET_IRQCHIP KVM: Bump KVM_MAX_IRQ_ROUTES for s390 KVM: s390: irq routing for adapter interrupts. KVM: s390: adapter interrupt sources ...
2014-04-02Merge tag 'dt-for-linus' of git://git.secretlab.ca/git/linuxLinus Torvalds5-5/+5
Pull devicetree changes from Grant Likely: "Updates to devicetree core code. This branch contains the following notable changes: - add reserved memory binding - make struct device_node a kobject and remove legacy /proc/device-tree - ePAPR conformance fixes - update in-kernel DTC copy to version v1.4.0 - preparatory changes for dynamic device tree overlays - minor bug fixes and documentation changes The most significant change in this branch is the conversion of struct device_node to be a kobject that is exposed via sysfs and removal of the old /proc/device-tree code. This simplifies the device tree handling code and tightens up the lifecycle on device tree nodes. [updated: added fix for dangling select PROC_DEVICETREE]" * tag 'dt-for-linus' of git://git.secretlab.ca/git/linux: (29 commits) dt: Remove dangling "select PROC_DEVICETREE" of: Add support for ePAPR "stdout-path" property of: device_node kobject lifecycle fixes of: only scan for reserved mem when fdt present powerpc: add support for reserved memory defined by device tree arm64: add support for reserved memory defined by device tree of: add missing major vendors of: add vendor prefix for SMSC of: remove /proc/device-tree of/selftest: Add self tests for manipulation of properties of: Make device nodes kobjects so they show up in sysfs arm: add support for reserved memory defined by device tree drivers: of: add support for custom reserved memory drivers drivers: of: add initialization code for dynamic reserved memory drivers: of: add initialization code for static reserved memory of: document bindings for reserved-memory nodes Revert "of: fix of_update_property()" kbuild: dtbs_install: new make target ARM: mvebu: Allows to get the SoC ID even without PCI enabled of: Allows to use the PCI translator without the PCI core ...
2014-04-02Merge branch 'powernv-cpuidle' of ↵Linus Torvalds12-67/+161
git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc Pull powerpc non-virtualized cpuidle from Ben Herrenschmidt: "This is the branch I mentioned in my other pull request which contains our improved cpuidle support for the "powernv" platform (non-virtualized). It adds support for the "fast sleep" feature of the processor which provides higher power savings than our usual "nap" mode but at the cost of losing the timers while asleep, and thus exploits the new timer broadcast framework to work around that limitation. It's based on a tip timer tree that you seem to have already merged" * 'powernv-cpuidle' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: cpuidle/powernv: Parse device tree to setup idle states cpuidle/powernv: Add "Fast-Sleep" CPU idle state powerpc/powernv: Add OPAL call to resync timebase on wakeup powerpc/powernv: Add context management for Fast Sleep powerpc: Split timer_interrupt() into timer handling and interrupt handling routines powerpc: Implement tick broadcast IPI as a fixed IPI message powerpc: Free up the slot of PPC_MSG_CALL_FUNC_SINGLE IPI message
2014-04-02Merge branch 'next' of ↵Linus Torvalds161-898/+4409
git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc Pull main powerpc updates from Ben Herrenschmidt: "This time around, the powerpc merges are going to be a little bit more complicated than usual. This is the main pull request with most of the work for this merge window. I will describe it a bit more further down. There is some additional cpuidle driver work, however I haven't included it in this tree as it depends on some work in tip/timer-core which Thomas accidentally forgot to put in a topic branch. Since I didn't want to carry all of that tip timer stuff in powerpc -next, I setup a separate branch on top of Thomas tree with just that cpuidle driver in it, and Stephen has been carrying that in next separately for a while now. I'll send a separate pull request for it. Additionally, two new pieces in this tree add users for a sysfs API that Tejun and Greg have been deprecating in drivers-core-next. Thankfully Greg reverted the patch that removes the old API so this merge can happen cleanly, but once merged, I will send a patch adjusting our new code to the new API so that Greg can send you the removal patch. Now as for the content of this branch, we have a lot of perf work for power8 new counters including support for our new "nest" counters (also called 24x7) under pHyp (not natively yet). We have new functionality when running under the OPAL firmware (non-virtualized or KVM host), such as access to the firmware error logs and service processor dumps, system parameters and sensors, along with a hwmon driver for the latter. There's also a bunch of bug fixes accross the board, some LE fixes, and a nice set of selftests for validating our various types of copy loops. On the Freescale side, we see mostly new chip/board revisions, some clock updates, better support for machine checks and debug exceptions, etc..." * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (70 commits) powerpc/book3s: Fix CFAR clobbering issue in machine check handler. powerpc/compat: 32-bit little endian machine name is ppcle, not ppc powerpc/le: Big endian arguments for ppc_rtas() powerpc: Use default set of netfilter modules (CONFIG_NETFILTER_ADVANCED=n) powerpc/defconfigs: Enable THP in pseries defconfig powerpc/mm: Make sure a local_irq_disable prevent a parallel THP split powerpc: Rate-limit users spamming kernel log buffer powerpc/perf: Fix handling of L3 events with bank == 1 powerpc/perf/hv_{gpci, 24x7}: Add documentation of device attributes powerpc/perf: Add kconfig option for hypervisor provided counters powerpc/perf: Add support for the hv 24x7 interface powerpc/perf: Add support for the hv gpci (get performance counter info) interface powerpc/perf: Add macros for defining event fields & formats powerpc/perf: Add a shared interface to get gpci version and capabilities powerpc/perf: Add 24x7 interface headers powerpc/perf: Add hv_gpci interface header powerpc: Add hvcalls for 24x7 and gpci (Get Performance Counter Info) sysfs: create bin_attributes under the requested group powerpc/perf: Enable BHRB access for EBB events powerpc/perf: Add BHRB constraint and IFM MMCRA handling for EBB ...
2014-04-01Merge tag 'usb-3.15-rc1' of ↵Linus Torvalds2-3/+0
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb Pull USB patches from Greg KH: "Here's the big USB pull request for 3.15-rc1. The normal set of patches, lots of controller driver updates, and a smattering of individual USB driver updates as well. All have been in linux-next for a while" * tag 'usb-3.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (249 commits) xhci: Transition maintainership to Mathias Nyman. USB: disable reset-resume when USB_QUIRK_RESET is set USB: unbind all interfaces before rebinding any usb: phy: Add ulpi IDs for SMSC USB3320 and TI TUSB1210 usb: gadget: tcm_usb_gadget: stop format strings usb: gadget: f_fs: add missing spinlock and mutex unlock usb: gadget: composite: switch over to ERR_CAST() usb: gadget: inode: switch over to memdup_user() usb: gadget: f_subset: switch over to PTR_RET usb: gadget: lpc32xx_udc: fix wrong clk_put() sequence USB: keyspan: remove dead debugging code USB: serial: add missing newlines to dev_<level> messages. USB: serial: add missing braces USB: serial: continue to write on errors USB: serial: continue to read on errors USB: serial: make bulk_out_size a lower limit USB: cypress_m8: fix potential scheduling while atomic devicetree: bindings: document lsi,zevio-usb usb: chipidea: add support for USB OTG controller on LSI Zevio SoCs usb: chipidea: imx: Use dev_name() for ci_hdrc name to distinguish USBs ...
2014-04-01Merge tag 'char-misc-3.15-rc1' of ↵Linus Torvalds4-1148/+0
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc Pull char/misc driver patches from Greg KH: "Here's the big char/misc driver updates for 3.15-rc1. Lots of various things here, including the new mcb driver subsystem. All of these have been in linux-next for a while" * tag 'char-misc-3.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (118 commits) extcon: Move OF helper function to extcon core and change function name extcon: of: Remove unnecessary function call by using the name of device_node extcon: gpio: Use SIMPLE_DEV_PM_OPS macro extcon: palmas: Use SIMPLE_DEV_PM_OPS macro mei: don't use deprecated DEFINE_PCI_DEVICE_TABLE macro mei: amthif: fix checkpatch error mei: client.h fix checkpatch errors mei: use cl_dbg where appropriate mei: fix Unnecessary space after function pointer name mei: report consistently copy_from/to_user failures mei: drop pr_fmt macros mei: make me hw headers private to me hw. mei: fix memory leak of pending write cb objects mei: me: do not reset when less than expected data is received drivers: mcb: Fix build error discovered by 0-day bot cs5535-mfgpt: Simplify dependencies spmi: pm: drop bus-level PM suspend/resume routines spmi: pmic_arb: make selectable on ARCH_QCOM Drivers: hv: vmbus: Increase the limit on the number of pfns we can handle pch_phub: Report error writing MAC back to user ...
2014-04-01Merge tag 'pci-v3.15-changes' of ↵Linus Torvalds2-6/+4
git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci Pull PCI changes from Bjorn Helgaas: "Enumeration - Increment max correctly in pci_scan_bridge() (Andreas Noever) - Clarify the "scan anyway" comment in pci_scan_bridge() (Andreas Noever) - Assign CardBus bus number only during the second pass (Andreas Noever) - Use request_resource_conflict() instead of insert_ for bus numbers (Andreas Noever) - Make sure bus number resources stay within their parents bounds (Andreas Noever) - Remove pci_fixup_parent_subordinate_busnr() (Andreas Noever) - Check for child busses which use more bus numbers than allocated (Andreas Noever) - Don't scan random busses in pci_scan_bridge() (Andreas Noever) - x86: Drop pcibios_scan_root() check for bus already scanned (Bjorn Helgaas) - x86: Use pcibios_scan_root() instead of pci_scan_bus_with_sysdata() (Bjorn Helgaas) - x86: Use pcibios_scan_root() instead of pci_scan_bus_on_node() (Bjorn Helgaas) - x86: Merge pci_scan_bus_on_node() into pcibios_scan_root() (Bjorn Helgaas) - x86: Drop return value of pcibios_scan_root() (Bjorn Helgaas) NUMA - x86: Add x86_pci_root_bus_node() to look up NUMA node from PCI bus (Bjorn Helgaas) - x86: Use x86_pci_root_bus_node() instead of get_mp_bus_to_node() (Bjorn Helgaas) - x86: Remove mp_bus_to_node[], set_mp_bus_to_node(), get_mp_bus_to_node() (Bjorn Helgaas) - x86: Use NUMA_NO_NODE, not -1, for unknown node (Bjorn Helgaas) - x86: Remove acpi_get_pxm() usage (Bjorn Helgaas) - ia64: Use NUMA_NO_NODE, not MAX_NUMNODES, for unknown node (Bjorn Helgaas) - ia64: Remove acpi_get_pxm() usage (Bjorn Helgaas) - ACPI: Fix acpi_get_node() prototype (Bjorn Helgaas) Resource management - i2o: Fix and refactor PCI space allocation (Bjorn Helgaas) - Add resource_contains() (Bjorn Helgaas) - Add %pR support for IORESOURCE_UNSET (Bjorn Helgaas) - Mark resources as IORESOURCE_UNSET if we can't assign them (Bjorn Helgaas) - Don't clear IORESOURCE_UNSET when updating BAR (Bjorn Helgaas) - Check IORESOURCE_UNSET before updating BAR (Bjorn Helgaas) - Don't try to claim IORESOURCE_UNSET resources (Bjorn Helgaas) - Mark 64-bit resource as IORESOURCE_UNSET if we only support 32-bit (Bjorn Helgaas) - Don't enable decoding if BAR hasn't been assigned an address (Bjorn Helgaas) - Add "weak" generic pcibios_enable_device() implementation (Bjorn Helgaas) - alpha, microblaze, sh, sparc, tile: Use default pcibios_enable_device() (Bjorn Helgaas) - s390: Use generic pci_enable_resources() (Bjorn Helgaas) - Don't check resource_size() in pci_bus_alloc_resource() (Bjorn Helgaas) - Set type in __request_region() (Bjorn Helgaas) - Check all IORESOURCE_TYPE_BITS in pci_bus_alloc_from_region() (Bjorn Helgaas) - Change pci_bus_alloc_resource() type_mask to unsigned long (Bjorn Helgaas) - Log IDE resource quirk in dmesg (Bjorn Helgaas) - Revert "[PATCH] Insert GART region into resource map" (Bjorn Helgaas) PCI device hotplug - Make check_link_active() non-static (Rajat Jain) - Use link change notifications for hot-plug and removal (Rajat Jain) - Enable link state change notifications (Rajat Jain) - Don't disable the link permanently during removal (Rajat Jain) - Don't check adapter or latch status while disabling (Rajat Jain) - Disable link notification across slot reset (Rajat Jain) - Ensure very fast hotplug events are also processed (Rajat Jain) - Add hotplug_lock to serialize hotplug events (Rajat Jain) - Remove a non-existent card, regardless of "surprise" capability (Rajat Jain) - Don't turn slot off when hot-added device already exists (Yijing Wang) MSI - Keep pci_enable_msi() documentation (Alexander Gordeev) - ahci: Fix broken single MSI fallback (Alexander Gordeev) - ahci, vfio: Use pci_enable_msi_range() (Alexander Gordeev) - Check kmalloc() return value, fix leak of name (Greg Kroah-Hartman) - Fix leak of msi_attrs (Greg Kroah-Hartman) - Fix pci_msix_vec_count() htmldocs failure (Masanari Iida) Virtualization - Device-specific ACS support (Alex Williamson) Freescale i.MX6 - Wait for retraining (Marek Vasut) Marvell MVEBU - Use Device ID and revision from underlying endpoint (Andrew Lunn) - Fix incorrect size for PCI aperture resources (Jason Gunthorpe) - Call request_resource() on the apertures (Jason Gunthorpe) - Fix potential issue in range parsing (Jean-Jacques Hiblot) Renesas R-Car - Check platform_get_irq() return code (Ben Dooks) - Add error interrupt handling (Ben Dooks) - Fix bridge logic configuration accesses (Ben Dooks) - Register each instance independently (Magnus Damm) - Break out window size handling (Magnus Damm) - Make the Kconfig dependencies more generic (Magnus Damm) Synopsys DesignWare - Fix RC BAR to be single 64-bit non-prefetchable memory (Mohit Kumar) Miscellaneous - Remove unused SR-IOV VF Migration support (Bjorn Helgaas) - Enable INTx if BIOS left them disabled (Bjorn Helgaas) - Fix hex vs decimal typo in cpqhpc_probe() (Dan Carpenter) - Clean up par-arch object file list (Liviu Dudau) - Set IORESOURCE_ROM_SHADOW only for the default VGA device (Sander Eikelenboom) - ACPI, ARM, drm, powerpc, pcmcia, PCI: Use list_for_each_entry() for bus traversal (Yijing Wang) - Fix pci_bus_b() build failure (Paul Gortmaker)" * tag 'pci-v3.15-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (108 commits) Revert "[PATCH] Insert GART region into resource map" PCI: Log IDE resource quirk in dmesg PCI: Change pci_bus_alloc_resource() type_mask to unsigned long PCI: Check all IORESOURCE_TYPE_BITS in pci_bus_alloc_from_region() resources: Set type in __request_region() PCI: Don't check resource_size() in pci_bus_alloc_resource() s390/PCI: Use generic pci_enable_resources() tile PCI RC: Use default pcibios_enable_device() sparc/PCI: Use default pcibios_enable_device() (Leon only) sh/PCI: Use default pcibios_enable_device() microblaze/PCI: Use default pcibios_enable_device() alpha/PCI: Use default pcibios_enable_device() PCI: Add "weak" generic pcibios_enable_device() implementation PCI: Don't enable decoding if BAR hasn't been assigned an address PCI: Enable INTx in pci_reenable_device() only when MSI/MSI-X not enabled PCI: Mark 64-bit resource as IORESOURCE_UNSET if we only support 32-bit PCI: Don't try to claim IORESOURCE_UNSET resources PCI: Check IORESOURCE_UNSET before updating BAR PCI: Don't clear IORESOURCE_UNSET when updating BAR PCI: Mark resources as IORESOURCE_UNSET if we can't assign them ... Conflicts: arch/x86/include/asm/topology.h drivers/ata/ahci.c
2014-04-01Merge tag 'pm+acpi-3.15-rc1' of ↵Linus Torvalds1-2/+1
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull ACPI and power management updates from Rafael Wysocki: "The majority of this material spent some time in linux-next, some of it even several weeks. There are a few relatively fresh commits in it, but they are mostly fixes and simple cleanups. ACPI took the lead this time, both in terms of the number of commits and the number of modified lines of code, cpufreq follows and there are a few changes in the PM core and in cpuidle too. A new feature that already got some LWN.net's attention is the device PM QoS extension allowing latency tolerance requirements to be propagated from leaf devices to their ancestors with hardware interfaces for specifying latency tolerance. That should help systems with hardware-driven power management to avoid going too far with it in cases when there are latency tolerance constraints. There also are some significant changes in the ACPI core related to the way in which hotplug notifications are handled. They affect PCI hotplug (ACPIPHP) and the ACPI dock station code too. The bottom line is that all those notification now go through the root notify handler and are propagated to the interested subsystems by means of callbacks instead of having to install a notify handler for each device object that we can potentially get hotplug notifications for. In addition to that ACPICA will now advertise "Windows 2013" compatibility for _OSI, because some systems out there don't work correctly if that is not done (some of them don't even boot). On the system suspend side of things, all of the device suspend and resume callbacks, except for ->prepare() and ->complete(), are now going to be executed asynchronously as that turns out to speed up system suspend and resume on some platforms quite significantly and we have a few more optimizations in that area. Apart from that, there are some new device IDs and fixes and cleanups all over. In particular, the system suspend and resume handling by cpufreq should be improved and the cpuidle menu governor should be a bit more robust now. Specifics: - Device PM QoS support for latency tolerance constraints on systems with hardware interfaces allowing such constraints to be specified. That is necessary to prevent hardware-driven power management from becoming overly aggressive on some systems and to prevent power management features leading to excessive latencies from being used in some cases. - Consolidation of the handling of ACPI hotplug notifications for device objects. This causes all device hotplug notifications to go through the root notify handler (that was executed for all of them anyway before) that propagates them to individual subsystems, if necessary, by executing callbacks provided by those subsystems (those callbacks are associated with struct acpi_device objects during device enumeration). As a result, the code in question becomes both smaller in size and more straightforward and all of those changes should not affect users. - ACPICA update, including fixes related to the handling of _PRT in cases when it is broken and the addition of "Windows 2013" to the list of supported "features" for _OSI (which is necessary to support systems that work incorrectly or don't even boot without it). Changes from Bob Moore and Lv Zheng. - Consolidation of ACPI _OST handling from Jiang Liu. - ACPI battery and AC fixes allowing unusual system configurations to be handled by that code from Alexander Mezin. - New device IDs for the ACPI LPSS driver from Chiau Ee Chew. - ACPI fan and thermal optimizations related to system suspend and resume from Aaron Lu. - Cleanups related to ACPI video from Jean Delvare. - Assorted ACPI fixes and cleanups from Al Stone, Hanjun Guo, Lan Tianyu, Paul Bolle, Tomasz Nowicki. - Intel RAPL (Running Average Power Limits) driver cleanups from Jacob Pan. - intel_pstate fixes and cleanups from Dirk Brandewie. - cpufreq fixes related to system suspend/resume handling from Viresh Kumar. - cpufreq core fixes and cleanups from Viresh Kumar, Stratos Karafotis, Saravana Kannan, Rashika Kheria, Joe Perches. - cpufreq drivers updates from Viresh Kumar, Zhuoyu Zhang, Rob Herring. - cpuidle fixes related to the menu governor from Tuukka Tikkanen. - cpuidle fix related to coupled CPUs handling from Paul Burton. - Asynchronous execution of all device suspend and resume callbacks, except for ->prepare and ->complete, during system suspend and resume from Chuansheng Liu. - Delayed resuming of runtime-suspended devices during system suspend for the PCI bus type and ACPI PM domain. - New set of PM helper routines to allow device runtime PM callbacks to be used during system suspend and resume more easily from Ulf Hansson. - Assorted fixes and cleanups in the PM core from Geert Uytterhoeven, Prabhakar Lad, Philipp Zabel, Rashika Kheria, Sebastian Capella. - devfreq fix from Saravana Kannan" * tag 'pm+acpi-3.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (162 commits) PM / devfreq: Rewrite devfreq_update_status() to fix multiple bugs PM / sleep: Correct whitespace errors in <linux/pm.h> intel_pstate: Set core to min P state during core offline cpufreq: Add stop CPU callback to cpufreq_driver interface cpufreq: Remove unnecessary braces cpufreq: Fix checkpatch errors and warnings cpufreq: powerpc: add cpufreq transition latency for FSL e500mc SoCs MAINTAINERS: Reorder maintainer addresses for PM and ACPI PM / Runtime: Update runtime_idle() documentation for return value meaning video / output: Drop display output class support fujitsu-laptop: Drop unneeded include acer-wmi: Stop selecting VIDEO_OUTPUT_CONTROL ACPI / gpu / drm: Stop selecting VIDEO_OUTPUT_CONTROL ACPI / video: fix ACPI_VIDEO dependencies cpufreq: remove unused notifier: CPUFREQ_{SUSPENDCHANGE|RESUMECHANGE} cpufreq: Do not allow ->setpolicy drivers to provide ->target cpufreq: arm_big_little: set 'physical_cluster' for each CPU cpufreq: arm_big_little: make vexpress driver depend on bL core driver ACPI / button: Add ACPI Button event via netlink routine ACPI: Remove duplicate definitions of PREFIX ...
2014-04-01Merge branch 'irq-core-for-linus' of ↵Linus Torvalds3-18/+25
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull irq code updates from Thomas Gleixner: "The irq department proudly presents: - Another tree wide sweep of irq infrastructure abuse. Clear winner of the trainwreck engineering contest was: #include "../../../kernel/irq/settings.h" - Tree wide update of irq_set_affinity() callbacks which miss a cpu online check when picking a single cpu out of the affinity mask. - Tree wide consolidation of interrupt statistics. - Updates to the threaded interrupt infrastructure to allow explicit wakeup of the interrupt thread and a variant of synchronize_irq() which synchronizes only the hard interrupt handler. Both are needed to replace the homebrewn thread handling in the mmc/sdhci code. - New irq chip callbacks to allow proper support for GPIO based irqs. The GPIO based interrupts need to request/release GPIO resources from request/free_irq. - A few new ARM interrupt chips. No revolutionary new hardware, just differently wreckaged variations of the scheme. - Small improvments, cleanups and updates all over the place" I was hoping that that trainwreck engineering contest was a April Fools' joke. But no. * 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (68 commits) irqchip: sun7i/sun6i: Disable NMI before registering the handler ARM: sun7i/sun6i: dts: Fix IRQ number for sun6i NMI controller ARM: sun7i/sun6i: irqchip: Update the documentation ARM: sun7i/sun6i: dts: Add NMI irqchip support ARM: sun7i/sun6i: irqchip: Add irqchip driver for NMI controller genirq: Export symbol no_action() arm: omap: Fix typo in ams-delta-fiq.c m68k: atari: Fix the last kernel_stat.h fallout irqchip: sun4i: Simplify sun4i_irq_ack irqchip: sun4i: Use handle_fasteoi_irq for all interrupts genirq: procfs: Make smp_affinity values go+r softirq: Add linux/irq.h to make it compile again m68k: amiga: Add linux/irq.h to make it compile again irqchip: sun4i: Don't ack IRQs > 0, fix acking of IRQ 0 irqchip: sun4i: Fix a comment about mask register initialization irqchip: sun4i: Fix irq 0 not working genirq: Add a new IRQCHIP_EOI_THREADED flag genirq: Document IRQCHIP_ONESHOT_SAFE flag ARM: sunxi: dt: Convert to the new irq controller compatibles irqchip: sunxi: Change compatibles ...
2014-03-31Merge branch 'sched-core-for-linus' of ↵Linus Torvalds4-34/+15
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull scheduler changes from Ingo Molnar: "Bigger changes: - sched/idle restructuring: they are WIP preparation for deeper integration between the scheduler and idle state selection, by Nicolas Pitre. - add NUMA scheduling pseudo-interleaving, by Rik van Riel. - optimize cgroup context switches, by Peter Zijlstra. - RT scheduling enhancements, by Thomas Gleixner. The rest is smaller changes, non-urgnt fixes and cleanups" * 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (68 commits) sched: Clean up the task_hot() function sched: Remove double calculation in fix_small_imbalance() sched: Fix broken setscheduler() sparc64, sched: Remove unused sparc64_multi_core sched: Remove unused mc_capable() and smt_capable() sched/numa: Move task_numa_free() to __put_task_struct() sched/fair: Fix endless loop in idle_balance() sched/core: Fix endless loop in pick_next_task() sched/fair: Push down check for high priority class task into idle_balance() sched/rt: Fix picking RT and DL tasks from empty queue trace: Replace hardcoding of 19 with MAX_NICE sched: Guarantee task priority in pick_next_task() sched/idle: Remove stale old file sched: Put rq's sched_avg under CONFIG_FAIR_GROUP_SCHED cpuidle/arm64: Remove redundant cpuidle_idle_call() cpuidle/powernv: Remove redundant cpuidle_idle_call() sched, nohz: Exclude isolated cores from load balancing sched: Fix select_task_rq_fair() description comments workqueue: Replace hardcoding of -20 and 19 with MIN_NICE and MAX_NICE sys: Replace hardcoding of -20 and 19 with MIN_NICE and MAX_NICE ...
2014-03-31Merge branch 'core-locking-for-linus' of ↵Linus Torvalds1-2/+3
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull core locking updates from Ingo Molnar: "The biggest change is the MCS spinlock generalization changes from Tim Chen, Peter Zijlstra, Jason Low et al. There's also lockdep fixes/enhancements from Oleg Nesterov, in particular a false negative fix related to lockdep_set_novalidate_class() usage" * 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (22 commits) locking/mutex: Fix debug checks locking/mutexes: Add extra reschedule point locking/mutexes: Introduce cancelable MCS lock for adaptive spinning locking/mutexes: Unlock the mutex without the wait_lock locking/mutexes: Modify the way optimistic spinners are queued locking/mutexes: Return false if task need_resched() in mutex_can_spin_on_owner() locking: Move mcs_spinlock.h into kernel/locking/ m68k: Skip futex_atomic_cmpxchg_inatomic() test futex: Allow architectures to skip futex_atomic_cmpxchg_inatomic() test Revert "sched/wait: Suppress Sparse 'variable shadowing' warning" lockdep: Change lockdep_set_novalidate_class() to use _and_name lockdep: Change mark_held_locks() to check hlock->check instead of lockdep_no_validate lockdep: Don't create the wrong dependency on hlock->check == 0 lockdep: Make held_lock->check and "int check" argument bool locking/mcs: Allow architecture specific asm files to be used for contended case locking/mcs: Order the header files in Kbuild of each architecture in alphabetical order sched/wait: Suppress Sparse 'variable shadowing' warning hung_task/Documentation: Fix hung_task_warnings description locking/mcs: Allow architectures to hook in to contended paths locking/mcs: Micro-optimize the MCS code, add extra comments ...
2014-03-31Merge remote-tracking branch 'robh/for-next' into devicetree/nextGrant Likely2-0/+10
2014-03-31net: filter: add jited flag to indicate jit compiled filtersDaniel Borkmann1-1/+2
This patch adds a jited flag into sk_filter struct in order to indicate whether a filter is currently jited or not. The size of sk_filter is not being expanded as the 32 bit 'len' member allows upper bits to be reused since a filter can currently only grow as large as BPF_MAXINSNS. Therefore, there's enough room also for other in future needed flags to reuse 'len' field if necessary. The jited flag also allows for having alternative interpreter functions running as currently, we can only detect jit compiled filters by testing fp->bpf_func to not equal the address of sk_run_filter(). Joint work with Alexei Starovoitov. Signed-off-by: Alexei Starovoitov <ast@plumgrid.com> Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Cc: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-29Merge branch 'kvm-ppchv-next' of ↵Paolo Bonzini13-67/+377
git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc into kvm-next
2014-03-29KVM: PPC: Book3S HV: Save/restore host PMU registers that are new in POWER8Paul Mackerras3-1/+33
Currently we save the host PMU configuration, counter values, etc., when entering a guest, and restore it on return from the guest. (We have to do this because the guest has control of the PMU while it is executing.) However, we missed saving/restoring the SIAR and SDAR registers, as well as the registers which are new on POWER8, namely SIER and MMCR2. This adds code to save the values of these registers when entering the guest and restore them on exit. This also works around the bug in POWER8 where setting PMAE with a counter already negative doesn't generate an interrupt. Signed-off-by: Paul Mackerras <paulus@samba.org> Acked-by: Scott Wood <scottwood@freescale.com>
2014-03-29KVM: PPC: Book3S HV: Fix decrementer timeouts with non-zero TB offsetPaul Mackerras1-1/+9
Commit c7699822bc21 ("KVM: PPC: Book3S HV: Make physical thread 0 do the MMU switching") reordered the guest entry/exit code so that most of the guest register save/restore code happened in guest MMU context. A side effect of that is that the timebase still contains the guest timebase value at the point where we compute and use vcpu->arch.dec_expires, and therefore that is now a guest timebase value rather than a host timebase value. That in turn means that the timeouts computed in kvmppc_set_timer() are wrong if the timebase offset for the guest is non-zero. The consequence of that is things such as "sleep 1" in a guest after migration may sleep for much longer than they should. This fixes the problem by converting between guest and host timebase values as necessary, by adding or subtracting the timebase offset. This also fixes an incorrect comment. Signed-off-by: Paul Mackerras <paulus@samba.org> Acked-by: Scott Wood <scottwood@freescale.com>
2014-03-29KVM: PPC: Book3S HV: Don't use kvm_memslots() in real modePaul Mackerras2-3/+15
With HV KVM, some high-frequency hypercalls such as H_ENTER are handled in real mode, and need to access the memslots array for the guest. Accessing the memslots array is safe, because we hold the SRCU read lock for the whole time that a guest vcpu is running. However, the checks that kvm_memslots() does when lockdep is enabled are potentially unsafe in real mode, when only the linear mapping is available. Furthermore, kvm_memslots() can be called from a secondary CPU thread, which is an offline CPU from the point of view of the host kernel, and is not running the task which holds the SRCU read lock. To avoid false positives in the checks in kvm_memslots(), and to avoid possible side effects from doing the checks in real mode, this replaces kvm_memslots() with kvm_memslots_raw() in all the places that execute in real mode. kvm_memslots_raw() is a new function that is like kvm_memslots() but uses rcu_dereference_raw_notrace() instead of kvm_dereference_check(). Signed-off-by: Paul Mackerras <paulus@samba.org> Acked-by: Scott Wood <scottwood@freescale.com>
2014-03-29KVM: PPC: Book3S HV: Return ENODEV error rather than EIOPaul Mackerras1-1/+1
If an attempt is made to load the kvm-hv module on a machine which doesn't have hypervisor mode available, return an ENODEV error, which is the conventional thing to return to indicate that this module is not applicable to the hardware of the current machine, rather than EIO, which causes a warning to be printed. Signed-off-by: Paul Mackerras <paulus@samba.org> Acked-by: Scott Wood <scottwood@freescale.com>
2014-03-29KVM: PPC: Book3S: Trim top 4 bits of physical address in RTAS codePaul Mackerras1-2/+5
The in-kernel emulation of RTAS functions needs to read the argument buffer from guest memory in order to find out what function is being requested. The guest supplies the guest physical address of the buffer, and on a real system the code that reads that buffer would run in guest real mode. In guest real mode, the processor ignores the top 4 bits of the address specified in load and store instructions. In order to emulate that behaviour correctly, we need to mask off those bits before calling kvm_read_guest() or kvm_write_guest(). This adds that masking. Signed-off-by: Paul Mackerras <paulus@samba.org> Acked-by: Scott Wood <scottwood@freescale.com>
2014-03-29KVM: PPC: Book3S HV: Add get/set_one_reg for new TM stateMichael Neuling1-22/+125
This adds code to get/set_one_reg to read and write the new transactional memory (TM) state. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Paul Mackerras <paulus@samba.org> Acked-by: Scott Wood <scottwood@freescale.com>
2014-03-29KVM: PPC: Book3S HV: Add transactional memory supportMichael Neuling4-30/+149
This adds saving of the transactional memory (TM) checkpointed state on guest entry and exit. We only do this if we see that the guest has an active transaction. It also adds emulation of the TM state changes when delivering IRQs into the guest. According to the architecture, if we are transactional when an IRQ occurs, the TM state is changed to suspended, otherwise it's left unchanged. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Paul Mackerras <paulus@samba.org> Acked-by: Scott Wood <scottwood@freescale.com>
2014-03-26net: Rename skb->rxhash to skb->hashTom Herbert1-2/+2
The packet hash can be considered a property of the packet, not just on RX path. This patch changes name of rxhash and l4_rxhash skbuff fields to be hash and l4_hash respectively. This includes changing uses of the field in the code which don't call the access functions. Signed-off-by: Tom Herbert <therbert@google.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Mahesh Bandewar <maheshb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-26KVM: PPC: Book3S HV: Fix KVM hang with CONFIG_KVM_XICS=nAnton Blanchard1-3/+1
I noticed KVM is broken when KVM in-kernel XICS emulation (CONFIG_KVM_XICS) is disabled. The problem was introduced in 48eaef05 (KVM: PPC: Book3S HV: use xics_wake_cpu only when defined). It used CONFIG_KVM_XICS to wrap xics_wake_cpu, where CONFIG_PPC_ICP_NATIVE should have been used. Signed-off-by: Anton Blanchard <anton@samba.org> Cc: stable@vger.kernel.org Signed-off-by: Paul Mackerras <paulus@samba.org> Acked-by: Scott Wood <scottwood@freescale.com>
2014-03-26KVM: PPC: Book3S: Introduce hypervisor call H_GET_TCELaurent Dufour3-1/+31
This introduces the H_GET_TCE hypervisor call, which is basically the reverse of H_PUT_TCE, as defined in the Power Architecture Platform Requirements (PAPR). The hcall H_GET_TCE is required by the kdump kernel, which uses it to retrieve TCEs set up by the previous (panicked) kernel. Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
2014-03-26KVM: PPC: Book3S HV: Fix incorrect userspace exit on ioeventfd writeGreg Kurz2-3/+8
When the guest does an MMIO write which is handled successfully by an ioeventfd, ioeventfd_write() returns 0 (success) and kvmppc_handle_store() returns EMULATE_DONE. Then kvmppc_emulate_mmio() converts EMULATE_DONE to RESUME_GUEST_NV and this causes an exit from the loop in kvmppc_vcpu_run_hv(), causing an exit back to userspace with a bogus exit reason code, typically causing userspace (e.g. qemu) to crash with a message about an unknown exit code. This adds handling of RESUME_GUEST_NV in kvmppc_vcpu_run_hv() in order to fix that. For generality, we define a helper to check for either of the return-to-guest codes we use, RESUME_GUEST and RESUME_GUEST_NV, to make it easy to check for either and provide one place to update if any other return-to-guest code gets defined in future. Since it only affects Book3S HV for now, the helper is added to the kvm_book3s.h header file. We use the helper in two places in kvmppc_run_core() as well for future-proofing, though we don't see RESUME_GUEST_NV in either place at present. [paulus@samba.org - combined 4 patches into one, rewrote description] Suggested-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2014-03-24Merge remote-tracking branch 'scott/next' into nextBenjamin Herrenschmidt57-210/+1259
Freescale updates from Scott. Mostly support for critical and machine check exceptions on 64-bit BookE, some new PCI suspend/resume work and misc bits.
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