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OpenCloudOS-Kernel
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Andrew Murray 1004ce4c25 coresight: etm4x: Use explicit barriers on enable/disable 
Synchronization is recommended before disabling the trace registers
to prevent any start or stop points being speculative at the point
of disabling the unit (section 7.3.77 of ARM IHI 0064D).

Synchronization is also recommended after programming the trace
registers to ensure all updates are committed prior to normal code
resuming (section 4.3.7 of ARM IHI 0064D).

Let's ensure these syncronization points are present in the code
and clearly commented.

Note that we could rely on the barriers in CS_LOCK and
coresight_disclaim_device_unlocked or the context switch to user
space - however coresight may be of use in the kernel.

On armv8 the mb macro is defined as dsb(sy) - Given that the etm4x is
only used on armv8 let's directly use dsb(sy) instead of mb(). This
removes some ambiguity and makes it easier to correlate the code with
the TRM.

Signed-off-by: Andrew Murray <andrew.murray@arm.com>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
[Fixed capital letter for "use" in title]
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20190829202842.580-11-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2019-09-03 22:01:17 +02:00
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accessibility
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acpi ACPI / property: Add two new Thunderbolt property GUIDs to the list 2019-08-26 12:15:11 +03:00
amba Driver Core and debugfs changes for 5.3-rc1 2019-07-12 12:24:03 -07:00
android binder: prevent transactions to context manager from its own process. 2019-07-24 11:02:28 +02:00
ata libata: add SG safety checks in SFF pio transfers 2019-08-07 12:23:57 -06:00
atm Kconfig: Fix the reference to the IDT77105 Phy driver in the description of ATM_NICSTAR_USE_IDT77105 2019-08-19 18:15:18 -07:00
auxdisplay auxdisplay: ht16k33: Make ht16k33_fb_fix and ht16k33_fb_var constant 2019-08-20 11:48:54 +02:00
base soundwire fixes for v5.3-rc5 2019-08-16 12:35:56 +02:00
bcma
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block rbd: restore zeroing past the overlap when reading from parent 2019-08-28 12:34:11 +02:00
bluetooth Bluetooth: hci_qca: Skip 1 error print in device_want_to_sleep() 2019-08-14 15:50:46 +02:00
bus Hisilicon fixes for v5.3-rc 2019-08-29 17:23:52 +02:00
cdrom
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char Merge 5.3-rc4 into char-misc-next 2019-08-12 07:33:23 +02:00
clk interconnect patches for 5.4 2019-09-03 21:47:37 +02:00
clocksource RISC-V: Remove per cpu clocksource 2019-08-06 14:37:58 -07:00
connector connector: remove redundant input callback from cn_dev 2019-07-21 13:31:14 -07:00
counter Staging / IIO driver update for 5.3-rc1 2019-07-11 15:36:02 -07:00
cpufreq cpufreq: dev_pm_qos_update_request() can return 1 on success 2019-08-10 13:39:47 +02:00
cpuidle Merge branch 'pm-cpufreq' 2019-07-18 09:49:30 +02:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2019-08-30 18:56:08 -07:00
dax Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-07-19 10:42:02 -07:00
dca
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devfreq
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dio
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dma Wimplicit-fallthrough patches for 5.3-rc6 2019-08-22 11:26:10 -07:00
dma-buf Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-07-19 10:42:02 -07:00
edac EDAC: Fix global-out-of-bounds write when setting edac_mc_poll_msec 2019-06-27 10:24:47 -07:00
eisa
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extcon extcon: adc-jack: Remove dev_err() usage after platform_get_irq() 2019-07-31 09:55:46 +09:00
firewire firewire: mark expected switch fall-throughs 2019-07-25 20:09:37 -05:00
firmware Merge branch 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-08-18 09:36:51 -07:00
fpga FPGA Manager changes for 5.4-rc1 2019-09-03 21:57:04 +02:00
fsi fsi: scom: Don't abort operations for minor errors 2019-08-28 22:59:18 +02:00
gnss
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gpio gpio: Fix irqchip initialization order 2019-08-23 11:00:43 +02:00
gpu drm/i915 fixes for v5.3-rc7: 2019-08-30 10:55:29 +10:00
hid HID: wacom: correct misreported EKR ring values 2019-08-20 10:40:40 +02:00
hsi
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hv Drivers: hv: vmbus: Fix virt_to_hvpfn() for X86_PAE 2019-08-20 12:49:57 -04:00
hwmon hwmon: (lm75) Fixup tmp75b clr_mask 2019-08-07 14:50:49 -07:00
hwspinlock hwspinlock: add the 'in_atomic' API 2019-06-29 21:08:14 -07:00
hwtracing coresight: etm4x: Use explicit barriers on enable/disable 2019-09-03 22:01:17 +02:00
i2c i2c: mediatek: disable zero-length transfers for mt8183 2019-08-30 15:06:17 +02:00
i3c * Drop support for 10-bit I2C addresses 2019-07-09 09:04:31 -07:00
ide It's been a relatively busy cycle for docs: 2019-07-09 12:34:26 -07:00
idle
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iio iio: adc: max9611: Fix temperature reading in probe 2019-08-05 17:42:24 +01:00
infiniband RDMA/siw: Fix IPv6 addr_list locking 2019-08-28 10:29:19 -04:00
input Input: hyperv-keyboard: Use in-place iterator API in the channel callback 2019-08-20 11:28:04 -04:00
interconnect drivers: qcom: Add BCM vote macro to header 2019-08-20 10:09:56 +03:00
iommu dma-direct: fix zone selection after an unaddressable CMA allocation 2019-08-21 07:14:10 +09:00
ipack TTY / Serial driver updates for 5.3-rc1 2019-07-11 15:38:21 -07:00
irqchip irqchip fixes for 5.3 2019-08-01 20:21:00 +02:00
isdn isdn: hfcsusb: Fix mISDN driver crash caused by transfer buffer on the stack 2019-07-31 08:54:06 -07:00
leds LED updates for 5.3-rc1 2019-07-09 08:59:39 -07:00
lightnvm
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macintosh drivers/macintosh/smu.c: Mark expected switch fall-through 2019-07-31 21:44:45 +10:00
mailbox - stm32: race fix by adding a spinlock 2019-07-14 16:36:51 -07:00
mcb
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md dm table: fix invalid memory accesses with too high sector number 2019-08-23 10:11:42 -04:00
media dmaengine fixes for v5.3-rc5 2019-08-16 08:59:33 -07:00
memory Kbuild updates for v5.3 (2nd) 2019-07-20 09:34:55 -07:00
memstick MMC core: 2019-07-11 18:11:21 -07:00
message SCSI misc on 20190709 2019-07-11 15:14:01 -07:00
mfd - Bug Fixes 2019-08-27 10:47:01 -07:00
misc Merge 5.3-rc7 into char-misc-next 2019-09-02 19:30:09 +02:00
mmc mmc: sdhci-cadence: enable v4_mode to fix ADMA 64-bit addressing 2019-08-30 09:17:53 +02:00
mtd mtd: hyperbus: fix dependency and build error 2019-08-29 14:31:23 +02:00
mux
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net net: seeq: Fix the function used to release some memory in an error handling path 2019-09-01 12:10:11 -07:00
nfc NFC: nfcmrvl: fix gpio-handling regression 2019-08-05 10:25:48 -07:00
ntb NTB/msi: remove incorrect MODULE defines 2019-08-05 15:42:27 -04:00
nubus
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nvdimm libnvdimm fixes v5.3-rc2 2019-07-27 08:25:51 -07:00
nvme nvme: Add quirk for LiteON CL1 devices running FW 22301111 2019-08-20 11:02:10 -06:00
nvmem nvmem: imx: add i.MX8QM platform support 2019-08-18 12:56:53 +02:00
of of: irq: fix a trivial typo in a doc comment 2019-08-14 20:12:16 -06:00
opp pci-v5.3-changes 2019-07-15 20:44:49 -07:00
oprofile vfs: Convert oprofilefs to use the new mount API 2019-07-04 22:01:59 -04:00
parisc
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parport parport: parport_serial: Use dev_get_drvdata 2019-08-05 17:56:46 +02:00
pci pci-v5.3-fixes-1 2019-08-22 14:04:47 -07:00
pcmcia pcmcia: db1xxx_ss: Mark expected switch fall-throughs 2019-08-09 19:53:04 -05:00
perf drivers/perf: arm_pmu: Fix failure path in PM notifier 2019-07-29 11:43:48 +01:00
phy phy: marvell: phy-mvebu-cp110-comphy: rename instances of DLT 2019-08-27 11:37:09 +05:30
pinctrl pinctrl: aspeed: Make aspeed_pinmux_ips static 2019-07-29 23:35:31 +02:00
platform chrome-platform fixes for v5.3-rc6 2019-08-22 11:17:20 -07:00
pnp docs: driver-api: add a series of orphaned documents 2019-07-15 11:03:02 -03:00
power power: supply: ab8500_charger: Mark expected switch fall-through 2019-08-20 19:43:33 -05:00
powercap powercap: Invoke powercap_init() and rapl_init() earlier 2019-07-22 11:23:00 +02:00
pps drivers/pps/pps.c: clear offset flags in PPS_SETPARAMS ioctl 2019-07-16 19:23:24 -07:00
ps3
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ptp
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pwm pwm: Fallback to the static lookup-list when acpi_pwm_get fails 2019-08-08 13:17:38 +02:00
rapidio Merge branch 'akpm' (patches from Andrew) 2019-07-17 08:58:04 -07:00
ras
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regulator regulator: of: Add of_node_put() before return in function 2019-08-01 14:07:46 +01:00
remoteproc remoteproc updates for v5.3 2019-07-17 11:44:41 -07:00
reset ARM: SoC-related driver updates 2019-07-19 17:13:56 -07:00
rpmsg
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rtc RTC for 5.3 2019-07-17 10:03:50 -07:00
s390 s390/qeth: reject oversized SNMP requests 2019-08-24 16:34:08 -07:00
sbus
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scsi SCSI fixes on 20190824 2019-08-24 11:26:51 -07:00
sfi
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sh
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siox
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slimbus slimbus: fix slim_tid_txn() 2019-08-18 12:56:10 +02:00
sn
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soc soc: ixp4xx: Protect IXP4xx SoC drivers by ARCH_IXP4XX || COMPILE_TEST 2019-08-29 17:34:38 +02:00
soundwire soundwire: fix regmap dependencies and align with other serial links 2019-08-09 10:20:40 +05:30
spi spi: Fixes for v5.3 2019-08-05 11:49:02 -07:00
spmi
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ssb
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staging staging: comedi: dt3000: Fix rounding up of timer divisor 2019-08-12 16:46:12 +02:00
target scsi: target: tcmu: avoid use-after-free after command timeout 2019-08-14 21:58:55 -04:00
tc
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tee
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thermal int340X/processor_thermal_device: Fix proc_thermal_rapl_remove() 2019-07-23 09:36:07 +02:00
thunderbolt thunderbolt: Add support for Intel Ice Lake 2019-08-26 12:15:06 +03:00
tty kgdboc: disable the console lock when in kgdb 2019-07-30 17:39:39 +02:00
uio uio: Remove dev_err() usage after platform_get_irq() 2019-07-30 20:32:11 +02:00
usb USB: cdc-wdm: fix race between write and disconnect due to flag abuse 2019-08-28 22:48:38 +02:00
uwb
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vfio VFIO updates for v5.3-rc1 2019-07-17 11:23:13 -07:00
vhost vhost: disable metadata prefetch optimization 2019-07-26 07:49:29 -04:00
video Wimplicit-fallthrough patches for 5.3-rc6 2019-08-22 11:26:10 -07:00
virt
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virtio Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-07-19 10:42:02 -07:00
visorbus
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vlynq
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vme
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w1 w1: omap-hdq: use devm_platform_ioremap_resource() to simplify code 2019-08-05 17:56:46 +02:00
watchdog Wimplicit-fallthrough patches for 5.3-rc6 2019-08-22 11:26:10 -07:00
xen xen: fixes for 5.3-rc3 2019-08-02 15:26:48 -07:00
zorro
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Kconfig
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Makefile
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