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2017-06-30Merge tag 'iommu-fixes-v4.12-rc7' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu Pull IOMMU fixes from Joerg Roedel: "Two fixes: - A fix for AMD IOMMU interrupt remapping code when IRQs are forwarded directly to KVM guests - Fixed check in the recently merged code to allow tboot with Intel VT-d disabled" * tag 'iommu-fixes-v4.12-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: iommu/amd: Fix interrupt remapping when disable guest_mode iommu/vt-d: Correctly disable Intel IOMMU force on
2017-06-30Merge tag 'sound-4.12' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound Pull sound fixes from Takashi Iwai: "Two last-minute HD-audio fixes" * tag 'sound-4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: ALSA: hda - Fix endless loop of codec configure ALSA: hda - set input_path bitmap to zero after moving it to new place
2017-06-30Merge branch 'overlayfs-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs Pull overlayfs fixes from Miklos Szeredi: "Fix two bugs in copy-up code. One introduced in 4.11 and one in 4.12-rc" * 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs: ovl: don't set origin on broken lower hardlink ovl: copy-up: don't unlock between lookup and link
2017-06-30Merge branch 'PTP-support-for-macb-driver'David S. Miller
Rafal Ozieblo says: ==================== PTP support for macb driver This patch series adds support for PTP synchronization protocol in Cadence GEM driver based on PHC. v2 changes: * removed alarm's support * removed external time stamp support * removed PTP event interrupt handling * removed ptp_hw_support flag * removed all extra sanity checks * removed unnecessary #ifdef * fixed coding style and alligment issues * renamed macb.c to macb_main.c v3 changes: * added checking NULL ptr from ptp_clock_register() * fixed error codes return * locals list in "upside down Christmas tree" style * fixed some other issues from review v4 changes: * respin to the newest next-next (28 Jun 2017) ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2017-06-30net: macb: Add hardware PTP supportRafal Ozieblo
This patch is based on original Harini's patch and Andrei's patch, implemented in a separate file to ease the review/maintanance and integration with other platforms. This driver supports GEM-GXL: - Register ptp clock framework - Initialize PTP related registers - HW time stamp on the PTP Ethernet packets are received using the SO_TIMESTAMPING API. Time stamps are obtained from the dma buffer descriptors - add macb_ptp to compilation chain Signed-off-by: Rafal Ozieblo <rafalo@cadence.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-06-30net: macb: macb.c changed to macb_main.cRafal Ozieblo
In case that macb is compiled as a module, macb.c has been renamed to macb_main.c to avoid naming confusion in Makefile. Signed-off-by: Rafal Ozieblo <rafalo@cadence.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-06-30net: macb: Add tsu_clk to device treeRafal Ozieblo
Signed-off-by: Rafal Ozieblo <rafalo@cadence.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-06-30net: macb: Add support for PTP timestamps in DMA descriptorsRafal Ozieblo
This patch adds support for PTP timestamps in DMA buffer descriptors. It checks capability at runtime and uses appropriate buffer descriptor. Signed-off-by: Rafal Ozieblo <rafalo@cadence.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-06-30lightnvm: pblk: set line bitmap check under debugJavier González
Do bitmap checks only when debug mode is enable. The line bitmap used for mapping to physical addresses is fairly large (~512KB) and it is expensive to do this checks on the fast path. Signed-off-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <matias@cnexlabs.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2017-06-30lightnvm: pblk: verify that cache read is still validJavier González
When a read is directed to the cache, we risk that the lba has been updated during the time we made the L2P table lookup and the time we are actually reading form the cache. We intentionally not hold the L2P lock not to block other threads. While strict ordering is not a guarantee at this level (unless REQ_FLUSH has been previously issued), we have experience that some databases that have recently implemented direct I/O support, issue metadata reads very close to the writes, without issuing a fsync in the middle. An easy way to support them while they is to make an extra effort and check the L2P map right before reading the cache. Signed-off-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <matias@cnexlabs.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2017-06-30lightnvm: pblk: add initialization checkJavier González
Add a sanity check to the pblk initialization sequence in order to ensure that enough LUNs have been allocated to store the line metadata. Signed-off-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <matias@cnexlabs.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2017-06-30lightnvm: pblk: remove target using async. I/OsJavier González
When removing a pblk instance, pad the current line using asynchronous I/O. This reduces the removal time from ~1 minute in the worst case to a couple of seconds. Signed-off-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <matias@cnexlabs.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2017-06-30lightnvm: pblk: use vmalloc for GC data bufferJavier González
For now, we allocate a per I/O buffer for GC data. Since the potential size of the buffer is 256KB and GC is not in the fast path, do this allocation with vmalloc. This puts lets pressure on the memory allocator at no performance cost. Signed-off-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <matias@cnexlabs.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2017-06-30lightnvm: pblk: use right metadata buffer for recoveryJavier González
Fix bad metadata buffer assignations introduced when refactoring the medatada write path. Fixes: dd2a43437337 lightnvm: pblk: sched. metadata on write thread Signed-off-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <matias@cnexlabs.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2017-06-30lightnvm: pblk: schedule if data is not readyJavier González
When user threads place data into the write buffer, they reserve space and do the memory copy out of the lock. As a consequence, when the write thread starts persisting data, there is a chance that it is not copied yet. In this case, avoid polling, and schedule before retrying. Signed-off-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <matias@cnexlabs.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2017-06-30lightnvm: pblk: remove unused return variableJavier González
Remove unused variable. Signed-off-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <matias@cnexlabs.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2017-06-30lightnvm: pblk: fix double-free on pblk initJavier González
Prevent pblk->lines being double freed in case of an error during pblk initialization. Fixes: dd2a43437337: "lightnvm: pblk: sched. metadata on write thread" Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <matias@cnexlabs.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2017-06-30lightnvm: pblk: fix bad le64 assignationsJavier González
Use the right types and conversions on le64 variables. Reported by sparse. Signed-off-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <matias@cnexlabs.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2017-06-30Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller
A set of overlapping changes in macvlan and the rocker driver, nothing serious. Signed-off-by: David S. Miller <davem@davemloft.net>
2017-06-30Merge tag 'irqchip-4.13-2' of ↵Thomas Gleixner
git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into irq/core Merge second batch of irqchip updates for 4.13 from Marc Zyngier - Potential out of bound access for GICv3 - Memory allocation gotcha in the Marvell GICP driver - Fix openrisc interrupt acknowledgement
2017-06-30perf auxtrace: Add CPU filter supportAdrian Hunter
Decoding auxtrace data can take a long time. To avoid decoding unnecessarily, filter auxtrace data that is collected per-cpu before it is decoded. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1495786658-18063-38-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-06-30perf intel-pt: Do not use TSC packets for calculating CPU cycles to TSCAdrian Hunter
CBR (core-to-bus ratio) packets provide an indication of CPU frequency. A more accurate measure can be made by counting the cycles (given by CYC packets) in between other timing packets (either MTC or TSC). Using TSC packets has at least 2 issues: 1) timing might have stopped (e.g. mwait) or 2) TSC packets within PSB+ might slip past CYC packets. For now, simply do not use TSC packets for calculating CPU cycles to TSC. That leaves the case where 2 MTC packets are used, otherwise falling back to the CBR value. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1495786658-18063-37-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-06-30perf intel-pt: Update documentation to include new ptwrite and power eventsAdrian Hunter
Update documentation to include new ptwrite and power events. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1495786658-18063-36-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-06-30perf intel-pt: Add example script for power events and PTWRITEAdrian Hunter
Add script intel-pt-events.py that provides an example of how to unpack the raw data for power events and PTWRITE. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1495786658-18063-35-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-06-30perf intel-pt: Synthesize new power and "ptwrite" eventsAdrian Hunter
Synthesize new power and ptwrite events. Power events report changes to C-state but I have also added support for the existing CBR (core-to-bus ratio) packet and included that when outputting power events. The PTWRITE packet is associated with the new "ptwrite" instruction, which is essentially just a way to stuff a 32 or 64 bit value into the PT trace. More details can be found in the patches that add documentation and in the Intel SDM. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1498811805-2335-1-git-send-email-adrian.hunter@intel.com [ Copy the description of such packet from the patchkit cover message ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-06-30perf intel-pt: Move code in intel_pt_synth_events() to simplify attr settingAdrian Hunter
intel_pt_synth_events() uses the same attr structure to create each event. Move the code around a bit to simplify that. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1495786658-18063-33-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-06-30perf intel-pt: Factor out intel_pt_set_event_name()Adrian Hunter
Factor out intel_pt_set_event_name() so it can be reused. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1495786658-18063-32-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-06-30perf intel-pt: Tidy messages into called function intel_pt_synth_event()Adrian Hunter
Tidy print messages into called function intel_pt_synth_event(). Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1495786658-18063-31-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-06-30perf intel-pt: Tidy Intel PT evsel lookup into separate functionAdrian Hunter
Tidy the lookup of the Intel PT selected event (perf_evsel) into a separate function. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1495786658-18063-30-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-06-30perf intel-pt: Join needlessly wrapped linesAdrian Hunter
Join needlessly wrapped lines. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1495786658-18063-29-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-06-30perf intel-pt: Remove unused instructions_sample_periodAdrian Hunter
Remove unused struct intel_pt member instructions_sample_period. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1495786658-18063-28-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-06-30perf intel-pt: Factor out common code synthesizing event samplesAdrian Hunter
Factor out common code in functions synthesizing event samples i.e. intel_pt_synth_branch_sample(), intel_pt_synth_instruction_sample() and intel_pt_synth_transaction_sample(). Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1495786658-18063-27-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-06-30perf script: Add synthesized Intel PT power and ptwrite eventsAdrian Hunter
Add definitions for synthesized Intel PT events for power and ptwrite. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1498811802-2301-1-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-06-30irqchip/or1k-pic: Fix interrupt acknowledgementPedro H. Penna
Usually, hardware implicitly acknowledges interrupts when reading them. However, if this is not the case, the IRQ gets fired over and over again in the current implementation. This patch uses the right mask acknowledge function to handle the aforementioned situation on or1k processors that interact with such kind of hardware. Acked-by: Stafford Horne <shorne@gmail.com> Signed-off-by: Pedro H. Penna <pedrohenriquepenna@gmail.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2017-06-30irqchip/irq-mvebu-gicp: Allocate enough memory for spi_bitmapDan Carpenter
BITS_TO_LONGS() gives us the number of longs we need, but we want to allocate the number of bytes. Fixes: a68a63cb4dfc ("irqchip/irq-mvebu-gicp: Add new driver for Marvell GICP") Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2017-06-30irqchip/gic-v3: Fix out-of-bound access in gic_set_affinitySuzuki K Poulose
The GICv3 driver doesn't check if the target CPU for gic_set_affinity is valid before going ahead and making the changes. This triggers the following splat with KASAN: [ 141.189434] BUG: KASAN: global-out-of-bounds in gic_set_affinity+0x8c/0x140 [ 141.189704] Read of size 8 at addr ffff200009741d20 by task swapper/1/0 [ 141.189958] [ 141.190158] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.12.0-rc7 [ 141.190458] Hardware name: Foundation-v8A (DT) [ 141.190658] Call trace: [ 141.190908] [<ffff200008089d70>] dump_backtrace+0x0/0x328 [ 141.191224] [<ffff20000808a1b4>] show_stack+0x14/0x20 [ 141.191507] [<ffff200008504c3c>] dump_stack+0xa4/0xc8 [ 141.191858] [<ffff20000826c19c>] print_address_description+0x13c/0x250 [ 141.192219] [<ffff20000826c5c8>] kasan_report+0x210/0x300 [ 141.192547] [<ffff20000826ad54>] __asan_load8+0x84/0x98 [ 141.192874] [<ffff20000854eeec>] gic_set_affinity+0x8c/0x140 [ 141.193158] [<ffff200008148b14>] irq_do_set_affinity+0x54/0xb8 [ 141.193473] [<ffff200008148d2c>] irq_set_affinity_locked+0x64/0xf0 [ 141.193828] [<ffff200008148e00>] __irq_set_affinity+0x48/0x78 [ 141.194158] [<ffff200008bc48a4>] arm_perf_starting_cpu+0x104/0x150 [ 141.194513] [<ffff2000080d73bc>] cpuhp_invoke_callback+0x17c/0x1f8 [ 141.194783] [<ffff2000080d94ec>] notify_cpu_starting+0x8c/0xb8 [ 141.195130] [<ffff2000080911ec>] secondary_start_kernel+0x15c/0x200 [ 141.195390] [<0000000080db81b4>] 0x80db81b4 [ 141.195603] [ 141.195685] The buggy address belongs to the variable: [ 141.196012] __cpu_logical_map+0x200/0x220 [ 141.196176] [ 141.196315] Memory state around the buggy address: [ 141.196586] ffff200009741c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 141.196913] ffff200009741c80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 141.197158] >ffff200009741d00: 00 00 00 00 fa fa fa fa 00 00 00 00 00 00 00 00 [ 141.197487] ^ [ 141.197758] ffff200009741d80: 00 00 00 00 00 00 00 00 fa fa fa fa 00 00 00 00 [ 141.198060] ffff200009741e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 141.198358] ================================================================== [ 141.198609] Disabling lock debugging due to kernel taint [ 141.198961] CPU1: Booted secondary processor [410fd051] This patch adds the check to make sure the cpu is valid. Fixes: commit 021f653791ad17e03f98 ("irqchip: gic-v3: Initial support for GICv3") Cc: stable@vger.kernel.org Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2017-06-30Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-nextDavid S. Miller
Pablo Neira Ayuso says: ==================== Netfilter updates for net-next The following patchset contains Netfilter updates for your net-next tree. This batch contains connection tracking updates for the cleanup iteration path, patches from Florian Westphal: X) Skip unconfirmed conntracks in nf_ct_iterate_cleanup_net(), just set dying bit to let the CPU release them. X) Add nf_ct_iterate_destroy() to be used on module removal, to kill conntrack from all namespace. X) Restart iteration on hashtable resizing, since both may occur at the same time. X) Use the new nf_ct_iterate_destroy() to remove conntrack with NAT mapping on module removal. X) Use nf_ct_iterate_destroy() to remove conntrack entries helper module removal, from Liping Zhang. X) Use nf_ct_iterate_cleanup_net() to remove the timeout extension if user requests this, also from Liping. X) Add net_ns_barrier() and use it from FTP helper, so make sure no concurrent namespace removal happens at the same time while the helper module is being removed. X) Use NFPROTO_MAX in layer 3 conntrack protocol array, to reduce module size. Same thing in nf_tables. Updates for the nf_tables infrastructure: X) Prepare usage of the extended ACK reporting infrastructure for nf_tables. X) Remove unnecessary forward declaration in nf_tables hash set. X) Skip set size estimation if number of element is not specified. X) Changes to accomodate a (faster) unresizable hash set implementation, for anonymous sets and dynamic size fixed sets with no timeouts. X) Faster lookup function for unresizable hash table for 2 and 4 bytes key. And, finally, a bunch of asorted small updates and cleanups: X) Do not hold reference to netdev from ipt_CLUSTER, instead subscribe to device events and look up for index from the packet path, this is fixing an issue that is present since the very beginning, patch from Xin Long. X) Use nf_register_net_hook() in ipt_CLUSTER, from Florian Westphal. X) Use ebt_invalid_target() whenever possible in the ebtables tree, from Gao Feng. X) Calm down compilation warning in nf_dup infrastructure, patch from stephen hemminger. X) Statify functions in nftables rt expression, also from stephen. X) Update Makefile to use canonical method to specify nf_tables-objs. From Jike Song. X) Use nf_conntrack_helpers_register() in amanda and H323. X) Space cleanup for ctnetlink, from linzhang. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2017-06-30regulator: core: Fix size limit of supply_mapHaishan Zhou
Now the debugfs file supply_map has a size limit PAGE_SIZE and the user can not see the whole content of regulator_map_list when it is larger than this limit. This patch uses seq_file instead to make sure supply_map shows the full information of regulator_map_list. Signed-off-by: Haishan Zhou <zhssmail@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-06-30Merge tag 'iwlwifi-next-for-kalle-2017-06-30' of ↵Kalle Valo
git://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/iwlwifi-next Final set of patches for 4.13 * Some important fixes for 9000 HW; * FW API changes for the upcoming -30 ucode release; * A few new PCI IDs for 9000 series; * Reorganization of common files; * Some more fixes and improvements here and there * Initialization and other important fixes for 9000 series; * Support for version 30 of the FW API for 8000 and 9000 series;
2017-06-30objtool: Implement stack validation 2.0Josh Poimboeuf
This is a major rewrite of objtool. Instead of only tracking frame pointer changes, it now tracks all stack-related operations, including all register saves/restores. In addition to making stack validation more robust, this also paves the way for undwarf generation. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Jiri Slaby <jslaby@suse.cz> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: live-patching@vger.kernel.org Link: http://lkml.kernel.org/r/678bd94c0566c6129bcc376cddb259c4c5633004.1498659915.git.jpoimboe@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-06-30objtool, x86: Add several functions and files to the objtool whitelistJosh Poimboeuf
In preparation for an objtool rewrite which will have broader checks, whitelist functions and files which cause problems because they do unusual things with the stack. These whitelists serve as a TODO list for which functions and files don't yet have undwarf unwinder coverage. Eventually most of the whitelists can be removed in favor of manual CFI hint annotations or objtool improvements. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Jiri Slaby <jslaby@suse.cz> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: live-patching@vger.kernel.org Link: http://lkml.kernel.org/r/7f934a5d707a574bda33ea282e9478e627fb1829.1498659915.git.jpoimboe@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-06-30objtool: Move checking code to check.cJosh Poimboeuf
In preparation for the new 'objtool undwarf generate' command, which will rely on 'objtool check', move the checking code from builtin-check.c to check.c where it can be used by other commands. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Reviewed-by: Jiri Slaby <jslaby@suse.cz> Cc: Andy Lutomirski <luto@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: live-patching@vger.kernel.org Link: http://lkml.kernel.org/r/294c5c695fd73c1a5000bbe5960a7c9bec4ee6b4.1498659915.git.jpoimboe@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-06-30posix_clocks: Use get_itimerspec64() and put_itimerspec64()Deepa Dinamani
Usage of these apis and their compat versions makes the syscalls: timer_settime and timer_gettime and their compat implementations simpler. This patch also serves as a preparatory patch for changing syscalls to use new time_t data types to support the y2038 effort by isolating the processing of user pointers through these apis. Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2017-06-30timerfd: Use get_itimerspec64() and put_itimerspec64()Deepa Dinamani
Usage of these apis and their compat versions makes the syscalls: timerfd_settime and timerfd_gettime and their compat implementations simpler. This patch also serves as a preparatory patch for changing syscalls to use new time_t data types to support the y2038 effort by isolating the processing of user pointers through these apis. Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2017-06-30nanosleep: Use get_timespec64() and put_timespec64()Deepa Dinamani
Usage of these apis and their compat versions makes the syscalls: clock_nanosleep and nanosleep and their compat implementations simpler. This is a preparatory patch to isolate data conversions to struct timespec64 at userspace boundaries. This helps contain the changes needed to transition to new y2038 safe types. Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2017-06-30posix-timers: Use get_timespec64() and put_timespec64()Deepa Dinamani
Usage of these apis and their compat versions makes the syscalls: clock_gettime, clock_settime, clock_getres and their compat implementations simpler. This is a preparatory patch to isolate data conversions to struct timespec64 at userspace boundaries. This helps contain the changes needed to transition to new y2038 safe types. Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2017-06-30x86/mm: Delete a big outdated comment about TLB flushingAndy Lutomirski
The comment describes the old explicit IPI-based flush logic, which is long gone. Signed-off-by: Andy Lutomirski <luto@kernel.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mel Gorman <mgorman@suse.de> Cc: Nadav Amit <nadav.amit@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rik van Riel <riel@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/55e44997e56086528140c5180f8337dc53fb7ffc.1498751203.git.luto@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-06-30x86/mm: Don't reenter flush_tlb_func_common()Andy Lutomirski
It was historically possible to have two concurrent TLB flushes targetting the same CPU: one initiated locally and one initiated remotely. This can now cause an OOPS in leave_mm() at arch/x86/mm/tlb.c:47: if (this_cpu_read(cpu_tlbstate.state) == TLBSTATE_OK) BUG(); with this call trace: flush_tlb_func_local arch/x86/mm/tlb.c:239 [inline] flush_tlb_mm_range+0x26d/0x370 arch/x86/mm/tlb.c:317 Without reentrancy, this OOPS is impossible: leave_mm() is only called if we're not in TLBSTATE_OK, but then we're unexpectedly in TLBSTATE_OK in leave_mm(). This can be caused by flush_tlb_func_remote() happening between the two checks and calling leave_mm(), resulting in two consecutive leave_mm() calls on the same CPU with no intervening switch_mm() calls. We never saw this OOPS before because the old leave_mm() implementation didn't put us back in TLBSTATE_OK, so the assertion didn't fire. Nadav noticed the reentrancy issue in a different context, but neither of us realized that it caused a problem yet. Reported-by: Levin, Alexander (Sasha Levin) <alexander.levin@verizon.com> Signed-off-by: Andy Lutomirski <luto@kernel.org> Reviewed-by: Nadav Amit <nadav.amit@gmail.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mel Gorman <mgorman@suse.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rik van Riel <riel@redhat.com> Cc: linux-mm@kvack.org Fixes: 3d28ebceaffa ("x86/mm: Rework lazy TLB to track the actual loaded mm") Link: http://lkml.kernel.org/r/855acf733268d521c9f2e191faee2dcc23a29729.1498751203.git.luto@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-06-30x86/uaccess: Optimize copy_user_enhanced_fast_string() for short stringsPaolo Abeni
According to the Intel datasheet, the REP MOVSB instruction exposes a pretty heavy setup cost (50 ticks), which hurts short string copy operations. This change tries to avoid this cost by calling the explicit loop available in the unrolled code for strings shorter than 64 bytes. The 64 bytes cutoff value is arbitrary from the code logic point of view - it has been selected based on measurements, as the largest value that still ensures a measurable gain. Micro benchmarks of the __copy_from_user() function with lengths in the [0-63] range show this performance gain (shorter the string, larger the gain): - in the [55%-4%] range on Intel Xeon(R) CPU E5-2690 v4 - in the [72%-9%] range on Intel Core i7-4810MQ Other tested CPUs - namely Intel Atom S1260 and AMD Opteron 8216 - show no difference, because they do not expose the ERMS feature bit. Signed-off-by: Paolo Abeni <pabeni@redhat.com> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Alan Cox <gnomes@lxorguk.ukuu.org.uk> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Hannes Frederic Sowa <hannes@stressinduktion.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Kees Cook <keescook@chromium.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/4533a1d101fd460f80e21329a34928fad521c1d4.1498744345.git.pabeni@redhat.com [ Clarified the changelog. ] Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-06-30sched/cputime: Refactor the cputime_adjust() codeGustavo A. R. Silva
Address a Coverity false positive, which is caused by overly convoluted code: Value assigned to variable 'utime' at line 619:utime = rtime; is overwritten at line 642:utime = rtime - stime; before it can be used. This makes such variable assignment useless. Remove this variable assignment and refactor the code related. Addresses-Coverity-ID: 1371643 Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com> Cc: Frans Klaver <fransklaver@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rik van Riel <riel@redhat.com> Cc: Stanislaw Gruszka <sgruszka@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wanpeng Li <wanpeng.li@hotmail.com> Link: http://lkml.kernel.org/r/20170629184128.GA5271@embeddedgus Signed-off-by: Ingo Molnar <mingo@kernel.org>
generated by cgit (git 2.34.1) at 2025-09-12 03:17:37 +0000