Alexander Shishkin
fdc2670666
perf: Add API for PMUs to write to the AUX area ...
For pmus that wish to write data to ring buffer's AUX area, provide
perf_aux_output_{begin,end}() calls to initiate/commit data writes,
similarly to perf_output_{begin,end}. These also use the same output
handle structure. Also, similarly to software counterparts, these
will direct inherited events' output to parents' ring buffers.
After the perf_aux_output_begin() returns successfully, handle->size
is set to the maximum amount of data that can be written wrt aux_tail
pointer, so that no data that the user hasn't seen will be overwritten,
therefore this should always be called before hardware writing is
enabled. On success, this will return the pointer to pmu driver's
private structure allocated for this aux area by pmu::setup_aux. Same
pointer can also be retrieved using perf_get_aux() while hardware
writing is enabled.
PMU driver should pass the actual amount of data written as a parameter
to perf_aux_output_end(). All hardware writes should be completed and
visible before this one is called.
Additionally, perf_aux_output_skip() will adjust output handle and
aux_head in case some part of the buffer has to be skipped over to
maintain hardware's alignment constraints.
Nested writers are forbidden and guards are in place to catch such
attempts.
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Kaixu Xia <kaixu.xia@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Robert Richter <rric@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: acme@infradead.org
Cc: adrian.hunter@intel.com
Cc: kan.liang@intel.com
Cc: markus.t.metzger@intel.com
Cc: mathieu.poirier@linaro.org
Link: http://lkml.kernel.org/r/1421237903-181015-8-git-send-email-alexander.shishkin@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-04-02 17:14:13 +02:00
ARM: 8256/1: driver coamba: add device binding path 'driver_override'
2015-02-10 10:23:15 +00:00
bcma: implement host code support for PCIe Gen 2 devices
2015-01-29 10:54:43 +02:00
libceph: tcp_nodelay support
2015-02-19 13:31:40 +03:00
clk: omap: compile legacy omap3 clocks conditionally
2015-02-03 11:06:11 -08:00
fsl /bestcomm
iio: core: Introduce IIO_CHAN_INFO_DEBOUNCE_COUNT and _TIME
2015-01-29 18:49:57 +00:00
Input: MT - add support for balanced slot assignment
2015-02-01 11:50:35 -08:00
irqchip: gicv3-its: Define macros for GITS_CTLR fields
2015-03-08 05:34:35 +00:00
regulator: palmas: Correct TPS659038 register definition for REGEN2
2015-03-17 12:19:14 +00:00
net/mlx4_core: Fix wrong mask and error flow for the update-qp command
2015-03-02 15:27:19 -05:00
MMC core:
2015-02-11 10:56:48 -08:00
MTD updates for 3.20-rc1
2015-02-18 08:01:44 -08:00
SCSI misc on 20150209
2015-02-11 10:28:45 -08:00
Revert "pinctrl: consumer: use correct retval for placeholder functions"
2015-03-05 10:08:14 +01:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
2015-02-21 12:59:04 -08:00
power: charger-manager: Use alarmtimer for battery monitoring in suspend.
2015-01-21 20:52:07 +01:00
regulator: Fix documentation for regmap in the config
2015-03-18 11:42:30 +00:00
rtc: add driver for DS1685 family of real time clocks
2015-02-16 17:56:05 -08:00
soc /ti
spi: fix a typo in comment.
2015-03-03 14:14:26 +00:00
bcma: detect SPROM revision 11
2015-01-29 10:49:28 +02:00
Merge branch 'cleanups'
2015-02-18 07:28:37 -08:00
Revert "USB: serial: make bulk_out_size a lower limit"
2015-02-26 17:02:15 +01:00
ACPI: Add interfaces to parse IOAPIC ID for IOAPIC hotplug
2015-02-05 15:09:26 +01:00
ata: ahci_platform: fix owner module reference mismatch for scsi host
2015-01-28 18:45:23 -05:00
ata: pata_platform: fix owner module reference mismatch for scsi host
2015-01-28 18:45:23 -05:00
Merge branch 'getname2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-02-17 15:27:47 -08:00
Merge branch 'lazytime' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-02-17 16:12:34 -08:00
watchdog: bcm47xx_wdt.c: add restart handler support
2015-02-17 21:33:27 +01:00
block: merge __bio_map_user_iov into bio_map_user_iov
2015-02-05 09:30:43 -07:00
bitmap, cpumask, nodemask: remove dedicated formatting functions
2015-02-13 21:21:39 -08:00
Merge branch 'for-3.20/core' of git://git.kernel.dk/linux-block
2015-02-12 14:13:23 -08:00
block: remove unused function blk_bio_map_sg
2015-02-11 11:24:14 -07:00
bpf: Make internal bpf API independent of CONFIG_BPF_SYSCALL #ifdefs
2015-04-02 13:25:49 +02:00
fs: introduce f_op->mmap_capabilities for nommu mmap support
2015-01-20 14:02:58 -07:00
clk: Add __clk_hw_set_clk helper function
2015-02-18 09:40:07 -08:00
clk: introduce clk_is_match
2015-03-11 15:56:59 -07:00
clockevents: Introduce mode specific callbacks
2015-02-18 15:16:23 +01:00
clocksource: Rename __clocksource_updatefreq_*() to __clocksource_update_freq_*()
2015-03-13 08:07:08 +01:00
mm/compaction: add tracepoint to observe behaviour of compaction defer
2015-02-11 17:06:04 -08:00
compat: Declare compat_sys_sigpending and compat_sys_sigprocmask prototypes
2015-01-27 09:37:53 +00:00
compiler: introduce __alias(symbol) shortcut
2015-02-13 21:21:40 -08:00
kasan: enable instrumentation of global variables
2015-02-13 21:21:42 -08:00
kasan: enable instrumentation of global variables
2015-02-13 21:21:42 -08:00
kernel: make READ_ONCE() valid on const arguments
2015-02-21 10:27:33 -08:00
coresight: remove the unnecessary function coresight_is_bit_set()
2015-02-04 10:42:55 -08:00
cpufreq: remove CPUFREQ_UPDATE_POLICY_CPU notifications
2015-01-23 23:06:44 +01:00
cpuidle / sleep: Use broadcast timer for states that stop local timer
2015-03-05 23:13:19 +01:00
bitmap, cpumask, nodemask: remove dedicated formatting functions
2015-02-13 21:21:39 -08:00
lib/halfmd4.c: simplify includes
2015-02-12 18:54:15 -08:00
VFS: Split DCACHE_FILE_TYPE into regular and special types
2015-02-22 11:38:38 -05:00
debugfs: Provide a file creation function that also takes an initial size
2015-02-17 12:21:51 -05:00
PM / devfreq: event: Add devfreq_event class
2015-01-30 17:56:40 +09:00
dm snapshot: suspend merging snapshot when doing exception handover
2015-02-27 14:53:16 -05:00
device: Change dev_<level> logging functions to return void
2015-01-26 15:57:59 -08:00
Merge branch 'topic/rcar' into for-linus
2015-02-02 16:55:43 -08:00
quota: Cleanup flags definitions
2015-01-21 19:21:30 +01:00
arm64 updates for 3.20:
2015-02-11 18:03:54 -08:00
exportfs: add methods for block layout exports
2015-02-05 14:35:17 +01:00
f2fs: introduce macros to convert bytes and blocks in f2fs
2015-02-11 17:04:48 -08:00
File locking related fixes for v3.20 (pile #2 )
2015-02-18 10:21:47 -08:00
new fs_pin killing logics
2015-01-25 23:17:28 -05:00
fsnotify: fix handling of renames in audit
2015-02-10 14:30:28 -08:00
tracing, perf: Implement BPF programs attached to kprobes
2015-04-02 13:25:49 +02:00
mm/mempolicy.c: merge alloc_hugepage_vma to alloc_pages_vma
2015-02-11 17:06:04 -08:00
[media] hdmi: rename HDMI_AUDIO_CODING_TYPE_EXT_STREAM to _EXT_CT
2015-01-27 10:19:12 -02:00
HID: hid-sensor-hub: Correct documentation
2015-02-17 13:34:44 +01:00
gpu: host1x: Provide a proper struct bus_type
2015-01-27 10:09:14 +01:00
hrtimer: Prevent stale expiry time in hrtimer_interrupt()
2015-01-23 12:13:20 +01:00
mm: numa: do not trap faults on the huge zero page
2015-02-12 18:54:08 -08:00
mm/hugetlb: take page table lock in follow_huge_pmd()
2015-02-11 17:06:01 -08:00
Drivers: hv: rename sc_lock to the more generic lock
2015-01-25 09:18:00 -08:00
Merge branch 'i2c/for-3.20' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
2015-02-21 12:41:50 -08:00
mac80111: Add BIP-CMAC-256 cipher
2015-01-27 11:09:13 +01:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2015-02-05 14:33:28 -08:00
kasan: enable stack instrumentation
2015-02-13 21:21:41 -08:00
genirq / PM: Add flag for shared NO_SUSPEND interrupt lines
2015-03-04 21:42:19 +01:00
ipv6: pull cork initialization into its own function.
2015-02-02 19:28:04 -08:00
genirq / PM: Add flag for shared NO_SUSPEND interrupt lines
2015-03-04 21:42:19 +01:00
kasan, module: move MODULE_ALIGN macro into <linux/moduleloader.h>
2015-03-12 18:46:08 -07:00
kdb: Avoid printing KERN_ levels to consoles
2015-02-19 12:39:02 -06:00
kernel.h: remove ancient __FUNCTION__ hack
2015-02-12 18:54:13 -08:00
kernfs: remove KERNFS_STATIC_NAME
2015-02-13 21:21:36 -08:00
kexec: add IND_FLAGS macro
2015-02-17 14:34:51 -08:00
Couple of items for 3.20
2015-01-24 10:11:12 +01:00
Fairly small update, but there are some interesting new features.
2015-02-13 09:55:09 -08:00
leds: Add LED Flash class extension to the LED subsystem
2015-01-26 14:59:08 -08:00
leds: Add LED Flash class extension to the LED subsystem
2015-01-26 14:59:08 -08:00
lguest: remove NOTIFY call and eventfd facility.
2015-02-11 16:47:46 +10:30
ata: Add a new flag to destinguish sas controller
2015-03-19 14:14:43 -04:00
memcg: reparent list_lrus and free kmemcg_id on css offline
2015-02-12 18:54:10 -08:00
livepatch: rename config to CONFIG_LIVEPATCH
2015-02-04 11:25:51 +01:00
dcache: let the dentry count go down to zero without taking d_lock
2015-01-25 23:16:29 -05:00
list_lru: introduce per-memcg lists
2015-02-12 18:54:09 -08:00
mm: numa: do not dereference pmd outside of the lock during NUMA hinting fault
2015-02-12 18:54:08 -08:00
mm: allow page fault handlers to perform the COW
2015-02-16 17:56:03 -08:00
mm: account pmd page tables to the process
2015-02-11 17:06:04 -08:00
mm: microoptimize zonelist operations
2015-02-11 17:06:02 -08:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2015-02-17 17:41:19 -08:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching
2015-03-18 10:46:39 -07:00
kasan, module: move MODULE_ALIGN macro into <linux/moduleloader.h>
2015-03-12 18:46:08 -07:00
mutex: remove unused field "name" in debug mode
2015-02-14 11:32:59 -08:00
netdev: introduce new NETIF_F_HW_SWITCH_OFFLOAD feature flag for switch device offloads
2015-02-01 23:16:33 -08:00
netdevice.h: fix ndo_bridge_* comments
2015-03-17 14:58:39 -04:00
Merge branch 'for-3.20' of git://linux-nfs.org/~bfields/linux
2015-02-12 10:39:41 -08:00
NFS: Fix a regression in the read() syscall
2015-03-03 13:02:29 -05:00
nfsv3: introduce nfs3_set_ds_client
2015-02-03 11:06:34 -08:00
pnfs/flexfiles: Add the FlexFile Layout Driver
2015-02-03 11:06:52 -08:00
nfs: add mirroring support to pgio layer
2015-02-03 11:06:45 -08:00
NFSv4.1: Clean up bind_conn_to_session
2015-02-18 13:11:09 -08:00
bitmap, cpumask, nodemask: remove dedicated formatting functions
2015-02-13 21:21:39 -08:00
NVMe: Fix potential corruption during shutdown
2015-02-19 16:15:37 -07:00
of/platform: Fix sparc:allmodconfig build
2015-03-13 09:45:24 -05:00
oom, PM: make OOM detection in the freezer path raceless
2015-02-11 17:06:03 -08:00
mm: add 'foreign' alias for the 'pinned' page flag
2015-01-28 14:03:09 +00:00
mm: page_counter: pull "-1" handling out of page_counter_memparse()
2015-02-11 17:06:02 -08:00
mm/page_owner.c: remove unnecessary stack_trace field
2015-02-11 17:06:07 -08:00
ACPI and power management updates for v3.20-rc1
2015-02-10 15:09:41 -08:00
perf: Add API for PMUs to write to the AUX area
2015-04-02 17:14:13 +02:00
net: phy: keep track of the PHY suspend state
2015-01-27 00:16:51 -08:00
new fs_pin killing logics
2015-01-25 23:17:28 -05:00
PM: Convert dev_pm_put_subsys_data() into a void function
2015-02-03 22:59:25 +01:00
PM / Domains: Eliminate the mutex for the generic_pm_domain_data
2015-02-03 22:56:53 +01:00
PNP: Allow console to override ACPI device sleep
2015-02-02 10:11:25 -08:00
hexdump: make it return number of bytes placed in buffer
2015-02-12 18:54:15 -08:00
quota: Store maximum space limit in bytes
2015-01-30 12:51:21 +01:00
quota: Add ->quota_{enable,disable} callbacks for VFS quotas
2015-01-30 12:50:32 +01:00
lib/rbtree.c: fix typo in comment
2015-02-17 14:34:52 -08:00
regmap: correct the description of structure element in reg_field
2015-01-27 13:13:04 +00:00
resources: Move struct resource_list_entry from ACPI into resource core
2015-02-05 15:09:25 +01:00
rhashtable: remove indirection for grow/shrink decision functions
2015-02-27 16:06:02 -05:00
vfs: remove get_xip_mem
2015-02-16 17:56:03 -08:00
rtc: Convert rtc_set_ntp_time() to use timespec64
2015-01-23 17:21:57 -08:00
mm: numa: slow PTE scan rate if migration failures occur
2015-03-25 16:20:31 -07:00
Add security hooks to binder and implement the hooks for SELinux.
2015-01-25 09:17:57 -08:00
bitmap, cpumask, nodemask: remove dedicated formatting functions
2015-02-13 21:21:39 -08:00
bitmap, cpumask, nodemask: remove dedicated formatting functions
2015-02-13 21:21:39 -08:00
serial: 8250: Use canary to restart console after suspend
2015-02-02 10:11:27 -08:00
serial: uapi: Declare all userspace-visible io types
2015-03-07 03:39:55 +01:00
vmscan: per memory cgroup slab shrinkers
2015-02-12 18:54:09 -08:00
xps: must clear sender_cpu before forwarding
2015-03-11 23:51:18 -04:00
mm: slub: add kernel address sanitizer support for slub allocator
2015-02-13 21:21:41 -08:00
slab: embed memcg_cache_params to kmem_cache
2015-02-12 18:54:09 -08:00
mm: slub: share object_err function
2015-02-13 21:21:41 -08:00
init: Get rid of x86isms
2015-01-22 15:10:56 +01:00
net: bury net/core/iovec.c - nothing in there is used anymore
2015-02-04 01:34:15 -05:00
mm/util: add kstrdup_const
2015-02-13 21:21:35 -08:00
libstring_helpers.c:string_get_size(): return void
2015-02-12 18:54:13 -08:00
PM / sleep: Re-implement suspend-to-idle handling
2015-02-13 23:49:36 +01:00
swap: remove unused mem_cgroup_uncharge_swapcache declaration
2015-02-11 17:06:00 -08:00
mm: remove remaining references to NUMA hinting bits and helpers
2015-02-12 18:54:08 -08:00
syscalls: Declare sys_*stat64 prototypes if __ARCH_WANT_(COMPAT_)STAT64
2015-01-27 09:38:00 +00:00
tcp: mitigate ACK loops for connections as tcp_timewait_sock
2015-02-08 01:03:13 -08:00
thermal: Introduce dummy functions when thermal is not defined
2015-02-24 14:40:42 -04:00
ti-st: clean up data types (fix harmless memory corruption)
2015-02-03 15:48:51 -08:00
PM / sleep: Make it possible to quiesce timers during suspend-to-idle
2015-02-15 19:40:09 +01:00
Merge branch 'fortglx/3.19-stable/time' of https://git.linaro.org/people/john.stultz/linux into timers/urgent
2015-01-22 12:28:02 +01:00
time: Add timerkeeper::tkr_raw
2015-03-27 09:45:07 +01:00
time: Add ktime_get_tai_ns()
2015-03-27 09:45:10 +01:00
tracing: Add condition check to RCU lockdep checks
2015-02-07 19:34:25 -05:00
tty: Remove external interface for tty_set_termios()
2015-02-02 10:11:28 -08:00
linux/types.h: Always use unsigned long for pgoff_t
2015-02-12 18:54:13 -08:00
new helper: dup_iter()
2015-02-17 22:21:11 -05:00
USB: don't cancel queued resets when unbinding drivers
2015-01-25 20:54:17 +08:00
vfio: Add and use device request op for vfio bus drivers
2015-02-10 12:37:47 -07:00
virtio-mmio: Update the device to OASIS spec version
2015-01-23 14:57:10 +10:30
kasan, module, vmalloc: rework shadow allocation for modules
2015-03-12 18:46:08 -07:00
vmci: propagate msghdr all way down to __qp_memcpy_to_queue()
2015-02-04 01:34:14 -05:00
vt_buffer: drop console buffer copying optimisations
2015-02-02 10:09:54 -08:00
Merge branch 'for-3.20/drivers' of git://git.kernel.dk/linux-block
2015-02-12 14:30:53 -08:00
workqueue: fix hang involving racing cancel[_delayed]_work_sync()'s for PREEMPT_NONE
2015-03-05 08:04:13 -05:00
mm/zpool: add name argument to create zpool
2015-02-12 18:54:12 -08:00
mm/zpool: add name argument to create zpool
2015-02-12 18:54:12 -08:00
