Peng Hao 0804c849f1 kvm/x86 : add coalesced pio support ... Coalesced pio is based on coalesced mmio and can be used for some port like rtc port, pci-host config port and so on. Specially in case of rtc as coalesced pio, some versions of windows guest access rtc frequently because of rtc as system tick. guest access rtc like this: write register index to 0x70, then write or read data from 0x71. writing 0x70 port is just as index and do nothing else. So we can use coalesced pio to handle this scene to reduce VM-EXIT time. When starting and closing a virtual machine, it will access pci-host config port frequently. So setting these port as coalesced pio can reduce startup and shutdown time. without my patch, get the vm-exit time of accessing rtc 0x70 and piix 0xcf8 using perf tools: (guest OS : windows 7 64bit) IO Port Access Samples Samples% Time% Min Time Max Time Avg time 0x70:POUT 86 30.99% 74.59% 9us 29us 10.75us (+- 3.41%) 0xcf8:POUT 1119 2.60% 2.12% 2.79us 56.83us 3.41us (+- 2.23%) with my patch IO Port Access Samples Samples% Time% Min Time Max Time Avg time 0x70:POUT 106 32.02% 29.47% 0us 10us 1.57us (+- 7.38%) 0xcf8:POUT 1065 1.67% 0.28% 0.41us 65.44us 0.66us (+- 10.55%) Signed-off-by: Peng Hao <peng.hao2@zte.com.cn> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>		2018-10-17 00:30:11 +02:00
..
ABI	xen/balloon: add runtime control for scrubbing ballooned out pages	2018-09-14 08:51:10 -04:00
EDID	…
PCI	Merge branch 'remotes/lorenzo/pci/dwc'	2018-08-15 14:59:11 -05:00
RCU	rculist: Improve documentation for list_for_each_entry_from_rcu()	2018-07-12 15:39:25 -07:00
accelerators	ocxl: Document new OCXL IOCTLs	2018-06-03 20:40:33 +10:00
accounting	…
acpi	ACPI: property: graph: Update graph documentation to use generic references	2018-07-23 12:44:52 +02:00
admin-guide	xen/balloon: add runtime control for scrubbing ballooned out pages	2018-09-14 08:51:10 -04:00
aoe	…
arm	ARM: Device-tree updates	2018-06-11 17:57:38 -07:00
arm64	Documentation/arm64/sve: Couple of improvements and typos	2018-08-29 11:33:19 +01:00
auxdisplay	Doc: misc-devices: move lcd-panel-cgram.txt to auxdisplay/	2018-04-12 16:08:02 +02:00
backlight	…
block	block: Track DISCARD statistics and output them in stat and diskstat	2018-07-18 08:44:22 -06:00
blockdev	zram: introduce zram memory tracking	2018-06-07 17:34:34 -07:00
bpf	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next	2018-08-07 11:02:05 -07:00
bus-devices	…
cdrom	Documentation/cdrom: fix German sharp s in LaTex	2018-03-08 19:35:29 -07:00
cgroup-v1	page cache: use xa_lock	2018-04-11 10:28:39 -07:00
cma	…
connector	…
console	Documentation: corrections to console/console.txt	2018-08-10 16:09:40 -06:00
core-api	docs/core-api: mm-api: add section about GFP flags	2018-08-23 18:48:43 -07:00
cpu-freq	cpufreq: Drop cpufreq_table_validate_and_show()	2018-04-10 08:40:45 +02:00
cpuidle	cpuidle: Add definition of residency to sysfs documentation	2018-04-09 13:44:37 +02:00
crypto	crypto: remove redundant type flags from tfm allocation	2018-07-09 00:30:29 +08:00
dev-tools	doc: dev-tools: kselftest.rst: update contributing new tests	2018-06-29 09:01:50 -06:00
device-mapper	dm raid: bump target version, update comments and documentation	2018-09-06 17:07:58 -04:00
devicetree	ARM: dts: at91: add new compatibility string for macb on sama5d3	2018-09-17 07:54:40 -07:00
doc-guide	Documentation/sphinx: allow "functions" with no parameters	2018-06-30 07:52:42 -06:00
driver-api	Merge branch 'for-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata	2018-08-24 13:20:33 -07:00
driver-model	dmaengine: add a new helper dmaenginem_async_device_register	2018-07-30 10:50:22 +05:30
early-userspace	initramfs: move gen_initramfs_list.sh from scripts/ to usr/	2018-08-22 23:21:44 +09:00
extcon	…
fault-injection	Documentation: nvme: Documentation for nvme fault injection	2018-03-26 08:53:43 -06:00
fb	Documentation/fb: corrections for fbcon.txt	2018-08-10 17:23:02 +02:00
features	ARM: 8777/1: Hook up SYNC_CORE functionality for sys_membarrier()	2018-07-11 11:02:08 +01:00
filesystems	vfs: add the fadvise() file operation	2018-08-30 17:08:35 +02:00
firmware_class	…
fmc	…
fpga	docs: fpga: add a document for FPGA Device Feature List (DFL) Framework Overview	2018-07-15 13:55:44 +02:00
gpio	Documentation: gpio: Move drivers-on-gpio.txt to driver-api	2018-03-23 04:22:29 +01:00
gpu	drm/msm/gpu: Add the buffer objects from the submit to the crash dump	2018-07-30 08:50:10 -04:00
hid	…
hwmon	hwmon: (ina2xx) fix sysfs shunt resistor read access	2018-08-26 17:45:25 -07:00
i2c	i2c: refactor function to release a DMA safe buffer	2018-08-30 23:13:15 +02:00
ia64	ia64: doc: tweak whitespace for 'console=' parameter	2018-03-05 14:41:38 -08:00
ide	…
iio	…
infiniband	Documentation/ABI: update infiniband sysfs interfaces	2018-02-23 08:18:33 -07:00
input	input: add MT_TOOL_DIAL	2018-07-17 15:33:47 +02:00
ioctl	Char/Misc driver patches for 4.19-rc1	2018-08-18 11:04:51 -07:00
isdn	Documentation/isdn: check and fix dead links ...	2018-03-26 12:31:13 -04:00
kbuild	kbuild: Fix LOADLIBES rename in Documentation/kbuild/makefiles.txt	2018-08-22 23:21:42 +09:00
kdump	…
kernel-hacking	doc:it_IT: translation for kernel-hacking	2018-07-26 16:21:09 -06:00
laptops	platform/x86: thinkpad_acpi: silence HKEY 0x6032, 0x60f0, 0x6030	2018-05-07 15:10:31 +03:00
leds	…
lightnvm	…
livepatch	livepatch: Remove not longer valid limitations from the documentation	2018-05-24 15:37:57 +02:00
locking	locking: Implement an algorithm choice for Wound-Wait mutexes	2018-07-03 09:44:36 +02:00
m68k	…
maintainer	docs: Fix more broken references	2018-06-15 18:11:26 -03:00
md	raid5-ppl: PPL support for disks with write-back cache enabled	2018-01-15 14:29:42 -08:00
media	media: doc: media/v4l-drivers: Update Qualcomm CAMSS driver document for 8x96	2018-08-02 08:48:00 -04:00
memory-devices	…
mic	…
mips	Documentation: mips: Update AU1xxx_IDE Kconfig dependencies	2018-02-01 12:45:35 -07:00
misc-devices	pci_endpoint_test: Add 2 ioctl commands	2018-07-19 11:46:57 +01:00
mmc	…
mtd	mtd: spi-nor: add an API to restore the status of SPI flash chip	2017-12-13 00:36:00 +01:00
namespaces	…
netlabel	…
networking	ARM: SoC driver updates	2018-08-23 13:52:46 -07:00
nfc	…
nios2	…
nvdimm	…
nvmem	…
openrisc	…
parisc	…
pcmcia	pcmcia: remove long deprecated pcmcia_request_exclusive_irq() function	2018-08-18 12:30:42 -07:00
perf	drivers/bus: Move Arm CCN PMU driver	2018-03-06 17:26:15 +01:00
phy	…
platform	…
power	PM / reboot: Eliminate race between reboot and suspend	2018-08-06 12:35:20 +02:00
powerpc	powerpc: Document issues with TM on POWER9	2018-07-02 23:54:29 +10:00
pps	…
process	Code of Conduct: Let's revamp it.	2018-09-16 11:42:28 -07:00
pti	…
ptp	ptp: Fix documentation to match code.	2018-03-26 12:13:21 -04:00
rapidio	Documentation: rapidio: move sysfs interface to ABI	2018-02-23 08:25:45 -07:00
riscv	perf: riscv: Add Document for Future Porting Guide	2018-06-04 14:02:11 -07:00
s390	s390: doc: detailed specifications for AP virtualization	2018-09-28 15:50:11 +02:00
scheduler	sched/deadline/Documentation: Add overrun signal and GRUB-PA documentation	2018-05-14 09:12:27 +02:00
scsi	scsi: documentation: add scsi_mod.use_blk_mq to scsi-parameters	2018-08-27 12:26:10 -04:00
security	Kbuild: rename CC_STACKPROTECTOR[_STRONG] config variables	2018-06-14 12:21:18 +09:00
serial	…
sh	…
sound	ASoC: Updates for v4.19	2018-08-13 12:12:31 +02:00
sparc	sparc64: Add support for ADI (Application Data Integrity)	2018-03-18 07:38:48 -07:00
sphinx	Documentation/sphinx: allow "functions" with no parameters	2018-06-30 07:52:42 -06:00
sphinx-static	…
spi	…
sysctl	namei: allow restricted O_CREAT of FIFOs and regular files	2018-08-23 18:48:43 -07:00
target	…
thermal	thermal: Add cooling device's statistics in sysfs	2018-04-02 21:49:01 +08:00
timers	timekeeping.txt: Correct maxCount of n-bit binary counter	2018-07-23 09:33:06 -06:00
trace	This was a moderately busy cycle for docs, with the usual collection of	2018-08-14 14:29:31 -07:00
translations	This was a moderately busy cycle for docs, with the usual collection of	2018-08-14 14:29:31 -07:00
usb	USB-serial updates for v4.19-rc1	2018-07-20 21:47:15 +02:00
userspace-api	audit/stable-4.18 PR 20180605	2018-06-06 16:34:00 -07:00
virtual	kvm/x86 : add coalesced pio support	2018-10-17 00:30:11 +02:00
vm	docs/vm: move ksm and transhuge from "user" to "internals" section.	2018-05-29 06:45:55 -06:00
w1	w1: fix w1_ds2438 documentation	2018-07-07 17:27:13 +02:00
watchdog	watchdog: remove bfin_wdt driver	2018-03-26 15:57:04 +02:00
wimax	…
x86	x86/doc: Fix Documentation/x86/earlyprintk.txt	2018-09-10 15:09:30 +02:00
xtensa	xtensa: add support for KASAN	2017-12-16 22:37:12 -08:00
.gitignore	…
00-INDEX	docs: admin-guide: add cgroup-v2 documentation	2018-05-10 15:42:41 -06:00
Changes	…
CodingStyle	…
DMA-API-HOWTO.txt	…
DMA-API.txt	…
DMA-ISA-LPC.txt	…
DMA-attributes.txt	…
IPMI.txt	…
IRQ-affinity.txt	…
IRQ-domain.txt	irqdomain: Kill CONFIG_IRQ_DOMAIN_DEBUG	2018-01-24 12:32:58 +01:00
IRQ.txt	…
Intel-IOMMU.txt	…
Makefile	…
SAK.txt	…
SM501.txt	…
SubmittingPatches	…
atomic_bitops.txt	locking/atomic/bitops: Document and clarify ordering semantics for failed test_and_{}_bit()	2018-02-13 14:55:53 +01:00
atomic_t.txt	…
bt8xxgpio.txt	…
btmrvl.txt	…
bus-virt-phys-mapping.txt	…
clearing-warn-once.txt	kernel debug: support resetting WARN*_ONCE	2017-11-17 16:10:00 -08:00
conf.py	ext4: import inode data fork chapter from wiki page	2018-07-29 15:45:00 -04:00
cpu-load.txt	…
cputopology.txt	…
crc32.txt	…
dcdbas.txt	…
debugging-modules.txt	…
debugging-via-ohci1394.txt	…
dell_rbu.txt	Documentation: remove stale firmware API reference	2018-05-14 16:44:41 +02:00
digsig.txt	…
docutils.conf	…
dontdiff	…
efi-stub.txt	…
eisa.txt	…
flexible-arrays.txt	…
futex-requeue-pi.txt	…
gcc-plugins.txt	…
highuid.txt	…
hw_random.txt	…
hwspinlock.txt	…
index.rst	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2018-08-15 15:04:25 -07:00
intel_txt.txt	…
io-mapping.txt	…
io_ordering.txt	…
iostats.txt	block: Track DISCARD statistics and output them in stat and diskstat	2018-07-18 08:44:22 -06:00
irqflags-tracing.txt	…
isa.txt	…
isapnp.txt	…
kernel-per-CPU-kthreads.txt	…
kobject.txt	…
kprobes.txt	kprobes/Documentation: Fix various typos	2018-06-22 11:10:55 +02:00
kref.txt	…
ldm.txt	…
lockup-watchdogs.txt	…
logo.gif	…
logo.txt	…
lsm.txt	…
lzo.txt	…
mailbox.txt	…
memory-barriers.txt	sched/Documentation: Update wake_up() & co. memory-barrier guarantees	2018-07-17 09:30:34 +02:00
memory-hotplug.txt	…
men-chameleon-bus.txt	…
nommu-mmap.txt	Documentation: nommu-map: Fix duplicate word typo	2018-06-26 09:01:27 -06:00
ntb.txt	…
numastat.txt	…
padata.txt	…
parport-lowlevel.txt	…
percpu-rw-semaphore.txt	…
phy.txt	…
pi-futex.txt	…
pnp.txt	…
preempt-locking.txt	…
pwm.txt	…
rbtree.txt	…
remoteproc.txt	…
rfkill.txt	rfkill: Fix several typos in documentation	2018-06-15 13:36:08 +02:00
robust-futex-ABI.txt	…
robust-futexes.txt	…
rpmsg.txt	…
rtc.txt	Documentation: rtc: move iotcl interface documentation to ABI	2018-01-12 00:20:41 +01:00
sgi-ioc4.txt	…
siphash.txt	…
smsc_ece1099.txt	…
speculation.txt	Documentation: Document array_index_nospec	2018-01-30 21:54:28 +01:00
static-keys.txt	…
svga.txt	documentation/svga.txt: update outdated file	2017-11-20 10:45:50 -07:00
switchtec.txt	NTB: switchtec_ntb: Update switchtec documentation with notes for NTB	2017-11-18 20:37:13 -05:00
sync_file.txt	…
tee.txt	…
this_cpu_ops.txt	…
unaligned-memory-access.txt	…
vfio-mediated-device.txt	vfio/mdev: Check globally for duplicate devices	2018-06-08 10:24:27 -06:00
vfio.txt	vfio: fix documentation	2018-05-08 09:16:41 -06:00
video-output.txt	…
xillybus.txt	…
xz.txt	…
zorro.txt	…