Xiongfeng Wang 3370a82d1d asm-generic: introduce io_stop_wc() and add implementation for ARM64 ... For memory accesses with write-combining attributes (e.g. those returned by ioremap_wc()), the CPU may wait for prior accesses to be merged with subsequent ones. But in some situation, such wait is bad for the performance. We introduce io_stop_wc() to prevent the merging of write-combining memory accesses before this macro with those after it. We add implementation for ARM64 using DGH instruction and provide NOP implementation for other architectures. Signed-off-by: Xiongfeng Wang <wangxiongfeng2@huawei.com> Suggested-by: Will Deacon <will@kernel.org> Suggested-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Link: https://lore.kernel.org/r/20211221035556.60346-1-wangxiongfeng2@huawei.com Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: hongrongxuan <hongrongxuan@huawei.com> Conflicts: arch/arm64/include/asm/barrier.h include/asm-generic/barrier.h		2024-06-12 13:16:50 +08:00
..
ABI	tkernel: sync code to the same with tk4 pub/lts/0017-kabi	2024-06-12 13:13:20 +08:00
EDID	docs: driver-api: add a series of orphaned documents	2019-07-15 11:03:02 -03:00
PCI	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2019-08-27 14:23:31 -07:00
RCU	Merge branches 'consolidate.2019.08.01b', 'fixes.2019.08.12a', 'lists.2019.08.13a' and 'torture.2019.08.01b' into HEAD	2019-08-13 14:30:30 -07:00
accounting	tkernel: sync code to the same with tk4 pub/lts/0017-kabi	2024-06-12 13:13:20 +08:00
admin-guide	tkernel: sync code to the same with tk4 pub/lts/0017-kabi	2024-06-12 13:13:20 +08:00
arm	tkernel: sync code to the same with tk4 pub/lts/0017-kabi	2024-06-12 13:13:20 +08:00
arm64	arm64: Add HWCAP for Data Gathering Hint instruction	2024-06-12 13:16:50 +08:00
block	docs: block: null_blk: enhance document style	2019-09-11 16:04:22 -06:00
bpf	ock: sync codes to ock 5.4.119-20.0009.21	2024-06-11 20:27:38 +08:00
cdrom	docs: add some directories to the main documentation index	2019-07-15 11:03:03 -03:00
core-api	tkernel: sync code to the same with tk4 pub/lts/0017-kabi	2024-06-12 13:13:20 +08:00
cpu-freq	Documentation: cpufreq: Update policy notifier documentation	2019-09-02 22:44:05 +02:00
crypto	Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2019-09-18 12:11:14 -07:00
dev-tools	tkernel: sync code to the same with tk4 pub/lts/0017-kabi	2024-06-12 13:13:20 +08:00
devicetree	tkernel: sync code to the same with tk4 pub/lts/0017-kabi	2024-06-12 13:13:20 +08:00
doc-guide	docs: remove extra conf.py files	2019-07-17 06:57:52 -03:00
driver-api	tkernel: sync code to the same with tk4 pub/lts/0017-kabi	2024-06-12 13:13:20 +08:00
fault-injection	tkernel: sync code to the same with tk4 pub/lts/0017-kabi	2024-06-12 13:13:20 +08:00
fb	tkernel: add base tlinux kernel interfaces	2024-06-11 20:09:33 +08:00
features	It's a somewhat calmer cycle for docs this time, as the churn of the mass	2019-09-17 16:22:26 -07:00
filesystems	tkernel: sync code to the same with tk4 pub/lts/0017-kabi	2024-06-12 13:13:20 +08:00
firmware-guide	tkernel: sync code to the same with tk4 pub/lts/0017-kabi	2024-06-12 13:13:20 +08:00
firmware_class	…
fpga	Documentation: fpga: dfl: add descriptions for virtualization and new interfaces.	2019-09-03 19:35:42 -07:00
gpu	Merge drm/drm-next into drm-intel-next-queued	2019-08-22 00:10:36 -07:00
hid	docs: add some documentation dirs to the driver-api book	2019-07-15 11:03:02 -03:00
hwmon	tkernel: sync code to the same with tk4 pub/lts/0017-kabi	2024-06-12 13:13:20 +08:00
i2c	docs: i2c: convert to ReST and add to driver-api bookset	2019-07-31 13:25:27 -06:00
ia64	docs: add SPDX tags to new index files	2019-07-15 11:03:03 -03:00
ide	docs: add some directories to the main documentation index	2019-07-15 11:03:03 -03:00
iio	docs: add some documentation dirs to the driver-api book	2019-07-15 11:03:02 -03:00
infiniband	Documentation/infiniband: update name of some functions	2019-09-13 16:55:55 -03:00
input	tkernel: sync code to the same with tk4 pub/lts/0017-kabi	2024-06-12 13:13:20 +08:00
ioctl	ock: sync codes to ock 5.4.119-20.0009.21	2024-06-11 20:27:38 +08:00
isdn	docs: isdn: convert to ReST and add to kAPI bookset	2019-07-31 13:30:25 -06:00
kbuild	ock: sync codes to ock 5.4.119-20.0009.21	2024-06-11 20:27:38 +08:00
kernel-hacking	docs: Add documentation for Symbol Namespaces	2019-09-10 10:30:49 +02:00
leds	leds: core: Add support for composing LED class device names	2019-07-25 20:07:52 +02:00
livepatch	docs: add some directories to the main documentation index	2019-07-15 11:03:03 -03:00
locking	doc🔒 remove reference to clever use of read-write lock	2019-09-14 01:53:27 -06:00
m68k	docs: README.buddha: convert to ReST and add to m68k book	2019-07-31 13:30:10 -06:00
maintainer	docs: Fix typo on pull requests guide	2019-08-12 15:14:14 -06:00
media	ock: sync codes to ock 5.4.119-20.0009.21	2024-06-11 20:27:38 +08:00
mic	docs: driver-api: add remaining converted dirs to it	2019-07-15 11:03:03 -03:00
mips	Main MIPS changes for v5.4:	2019-09-22 09:30:30 -07:00
misc-devices	Docs: misc: xilinx_sdfec: Add documentation	2019-08-15 17:54:38 +02:00
netlabel	docs: add some directories to the main documentation index	2019-07-15 11:03:03 -03:00
networking	tkernel: sync code to the same with tk4 pub/lts/0017-kabi	2024-06-12 13:13:20 +08:00
nios2	docs: nios2: add it to the main Documentation body	2019-07-31 13:31:51 -06:00
openrisc	docs: openrisc: convert to ReST and add to documentation body	2019-07-31 13:30:20 -06:00
parisc	docs: parisc: convert to ReST and add to documentation body	2019-07-31 13:30:15 -06:00
pcmcia	docs: add some directories to the main documentation index	2019-07-15 11:03:03 -03:00
power	Merge branches 'pm-opp', 'pm-qos', 'acpi-pm', 'pm-domains' and 'pm-tools'	2019-09-17 09:49:19 +02:00
powerpc	docs: powerpc: Add missing documentation reference	2019-09-17 23:59:34 +10:00
process	tkernel: sync code to the same with tk4 pub/lts/0017-kabi	2024-06-12 13:13:20 +08:00
riscv	It's a somewhat calmer cycle for docs this time, as the churn of the mass	2019-09-17 16:22:26 -07:00
s390	Documentation/s390: remove outdated debugging390 documentation	2019-08-21 12:41:43 +02:00
scheduler	sched/fair: Fix low cpu usage with high throttling by removing expiration of cpu-local slices	2019-08-08 09:09:30 +02:00
scsi	tkernel: sync code to the same with tk4 pub/lts/0017-kabi	2024-06-12 13:13:20 +08:00
security	Merge branch 'next-integrity' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity	2019-09-27 19:37:27 -07:00
sh	docs: remove extra conf.py files	2019-07-17 06:57:52 -03:00
sound	tkernel: sync code to the same with tk4 pub/lts/0017-kabi	2024-06-12 13:13:20 +08:00
sparc	docs: add arch doc directories to the index	2019-07-15 11:03:01 -03:00
sphinx	tkernel: sync code to the same with tk4 pub/lts/0017-kabi	2024-06-12 13:13:20 +08:00
sphinx-static	…
spi	spi: docs: convert to ReST and add it to the kABI bookset	2019-07-31 14:13:13 -06:00
target	tkernel: sync code to the same with tk4 pub/lts/0017-kabi	2024-06-12 13:13:20 +08:00
timers	docs: add some directories to the main documentation index	2019-07-15 11:03:03 -03:00
trace	tkernel: sync code to the same with tk4 pub/lts/0017-kabi	2024-06-12 13:13:20 +08:00
translations	doc: arm64: fix grammar dtb placed in no attributes region	2019-09-06 08:44:34 -06:00
usb	USB: rio500: Remove Rio 500 kernel driver	2019-10-04 10:53:36 +02:00
userspace-api	tkernel: sync code to the same with tk4 pub/lts/0017-kabi	2024-06-12 13:13:20 +08:00
virt	tkernel: sync code to the same with tk4 pub/lts/0017-kabi	2024-06-12 13:13:20 +08:00
virtual	cpuidle: add haltpoll governor	2019-07-30 17:27:37 +02:00
vm	tkernel: sync code to the same with tk4 pub/lts/0017-kabi	2024-06-12 13:13:20 +08:00
w1	docs: w1: convert to ReST and add to the kAPI group of docs	2019-07-31 14:16:17 -06:00
watchdog	linux-watchdog 5.4-rc1 tag	2019-09-27 11:17:38 -07:00
x86	ock: sync codes to ock 5.4.119-20.0009.21	2024-06-11 20:27:38 +08:00
xtensa	ock: sync codes to ock 5.4.119-20.0009.21	2024-06-11 20:27:38 +08:00
.gitignore	…
COPYING-logo	docs: logo.txt: rename it to COPYING-logo	2019-07-15 09:20:27 -03:00
Changes	…
CodingStyle	…
DMA-API-HOWTO.txt	docs: DMA-API-HOWTO.txt: fix an unmarked code block	2019-07-15 09:20:24 -03:00
DMA-API.txt	tkernel: sync code to the same with tk4 pub/lts/0017-kabi	2024-06-12 13:13:20 +08:00
DMA-ISA-LPC.txt	…
DMA-attributes.txt	…
IPMI.txt	…
IRQ-affinity.txt	…
IRQ-domain.txt	…
IRQ.txt	…
Kconfig	docs: Kbuild/Makefile: allow check for missing docs at build time	2019-06-07 11:33:16 -06:00
Makefile	docs: Kbuild/Makefile: allow check for missing docs at build time	2019-06-07 11:33:16 -06:00
SubmittingPatches	…
asm-annotations.rst	ock: sync codes to ock 5.4.119-20.0009.21	2024-06-11 20:27:38 +08:00
atomic_bitops.txt	tkernel: sync code to the same with tk4 pub/lts/0017-kabi	2024-06-12 13:13:20 +08:00
atomic_t.txt	Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2019-07-08 16:12:03 -07:00
bus-virt-phys-mapping.txt	…
conf.py	tkernel: sync code to the same with tk4 pub/lts/0017-kabi	2024-06-12 13:13:20 +08:00
crc32.txt	…
debugging-modules.txt	…
debugging-via-ohci1394.txt	…
digsig.txt	…
docutils.conf	doc-rst: Add missing newline at end of file	2019-06-20 14:16:56 -06:00
dontdiff	kbuild: create *.mod with full directory path and remove MODVERDIR	2019-07-18 02:19:31 +09:00
futex-requeue-pi.txt	…
hwspinlock.txt	hwspinlock: add the 'in_atomic' API	2019-06-29 21:08:14 -07:00
index.rst	ock: sync codes to ock 5.4.119-20.0009.21	2024-06-11 20:27:38 +08:00
io-mapping.txt	…
io_ordering.txt	…
irqflags-tracing.txt	…
kobject.txt	…
kprobes.txt	Merge branch 'parisc-5.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux	2019-05-07 19:34:17 -07:00
kref.txt	…
logo.gif	…
lzo.txt	ock: sync codes to ock 5.4.119-20.0009.21	2024-06-11 20:27:38 +08:00
mailbox.txt	…
memory-barriers.txt	asm-generic: introduce io_stop_wc() and add implementation for ARM64	2024-06-12 13:16:50 +08:00
nommu-mmap.txt	…
padata.txt	padata: allocate workqueue internally	2019-09-13 21:15:39 +10:00
percpu-rw-semaphore.txt	…
pi-futex.txt	docs: locking: convert docs to ReST and rename to *.rst	2019-07-15 08:53:27 -03:00
preempt-locking.txt	x86/fpu: Remove fpu__restore()	2019-04-09 19:27:42 +02:00
rbtree.txt	docs: rbtree.txt: fix Sphinx build warnings	2019-07-15 09:20:24 -03:00
remoteproc.txt	remoteproc: add vendor resources handling	2019-06-29 12:02:17 -07:00
robust-futex-ABI.txt	…
robust-futexes.txt	futex: Update comments and docs about return values of arch futex code	2019-04-26 13:57:55 +01:00
rpmsg.txt	…
speculation.txt	docs: speculation.txt: mark example blocks as such	2019-04-11 12:37:03 -06:00
static-keys.txt	…
tee.txt	Documentation: tee: Grammar s/the its/its/	2019-06-07 11:23:38 -06:00
this_cpu_ops.txt	…
unaligned-memory-access.txt	docs: unaligned-memory-access.txt: use a lowercase title	2019-04-11 12:37:03 -06:00
xz.txt	…