remarkable-linux/Documentation
Roman Kagan efc479e690 kvm: x86: hyperv: add KVM_CAP_HYPERV_SYNIC2
There is a flaw in the Hyper-V SynIC implementation in KVM: when message
page or event flags page is enabled by setting the corresponding msr,
KVM zeroes it out.  This is problematic because on migration the
corresponding MSRs are loaded on the destination, so the content of
those pages is lost.

This went unnoticed so far because the only user of those pages was
in-KVM hyperv synic timers, which could continue working despite that
zeroing.

Newer QEMU uses those pages for Hyper-V VMBus implementation, and
zeroing them breaks the migration.

Besides, in newer QEMU the content of those pages is fully managed by
QEMU, so zeroing them is undesirable even when writing the MSRs from the
guest side.

To support this new scheme, introduce a new capability,
KVM_CAP_HYPERV_SYNIC2, which, when enabled, makes sure that the synic
pages aren't zeroed out in KVM.

Signed-off-by: Roman Kagan <rkagan@virtuozzo.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2017-07-13 17:41:04 +02:00
..
ABI DeviceTree for 4.13: 2017-07-07 10:37:54 -07:00
accounting
acpi This is the bulk of GPIO changes for the v4.13 series: 2017-07-07 12:40:27 -07:00
admin-guide Merge branch 'akpm' (patches from Andrew) 2017-07-06 22:27:08 -07:00
aoe
arm ARM: at91: Documentation: add armv7m families 2017-06-02 10:11:09 +02:00
arm64 arm64: Add workaround for Cavium Thunder erratum 30115 2017-06-15 09:45:04 +01:00
auxdisplay
backlight
blackfin
block block: remove bio_clone() and all references. 2017-06-18 12:40:59 -06:00
blockdev
bus-devices
cdrom
cgroup-v1
cma
connector
console
core-api There has been a fair amount of activity in the docs tree this time 2017-07-03 21:13:25 -07:00
cpu-freq cpufreq: intel_pstate: Document the current behavior and user interface 2017-05-14 02:06:03 +02:00
cpuidle
cris
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2017-07-05 12:22:23 -07:00
dev-tools linux-kselftest-4.13-rc1-update 2017-07-07 14:04:47 -07:00
device-mapper dm zoned: drive-managed zoned block device target 2017-06-19 11:05:20 -04:00
devicetree main drm pull for v4.13 2017-07-09 18:48:37 -07:00
dmaengine
doc-guide kernel-doc: describe the `literal` syntax 2017-05-16 08:44:24 -03:00
driver-api This is the big bulk of pin control changes for the v4.13 series: 2017-07-06 11:38:59 -07:00
driver-model pci-v4.13-changes 2017-07-08 15:51:57 -07:00
early-userspace
EDID
extcon
fault-injection
fb docs: update old references for DocBook from the documentation 2017-05-16 08:44:19 -03:00
features powerpc updates for 4.12 part 1. 2017-05-05 11:36:44 -07:00
filesystems Writeback error handling fixes (pile #2) 2017-07-07 19:38:17 -07:00
firmware_class
fmc
fpga
frv
gpio
gpu main drm pull for v4.13 2017-07-09 18:48:37 -07:00
hid
hwmon hwmon: (pmbus) move header file out of I2C realm 2017-06-11 17:08:19 -07:00
i2c
ia64
ide
iio
infiniband
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2017-05-26 16:45:13 -07:00
ioctl scsi: cxlflash: Introduce host ioctl support 2017-06-26 15:01:11 -04:00
isdn
kbuild Kbuild thin archives updates for v4.13 2017-07-07 15:11:12 -07:00
kdump
kernel-hacking There has been a fair amount of activity in the docs tree this time 2017-07-03 21:13:25 -07:00
laptops
leds
lightnvm
livepatch
locking
m68k
md Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md 2017-05-03 10:05:38 -07:00
media media updates for v4.13-rc1 2017-07-06 11:15:19 -07:00
memory-devices
metag
mic
mips
misc-devices Documentation: misc-devices: Add Documentation for pci-endpoint-test driver 2017-04-28 10:23:19 -05:00
mmc MMC core: 2017-05-02 17:34:32 -07:00
mn10300
mtd
namespaces
netlabel
networking doc: SKB_GSO_[IPIP|SIT] have been replaced 2017-07-08 11:25:56 +01:00
nfc
nios2
nvdimm
nvmem
parisc
PCI docs: update old references for DocBook from the documentation 2017-05-16 08:44:19 -03:00
pcmcia
perf
phy
platform
power power supply and reset changes for the v4.13 series 2017-07-04 14:25:14 -07:00
powerpc powerpc updates for 4.13 2017-07-07 13:55:45 -07:00
pps
process Kbuild thin archives updates for v4.13 2017-07-07 15:11:12 -07:00
pti
ptp
rapidio
RCU rcu: Remove debugfs tracing 2017-06-08 18:52:43 -07:00
s390
scheduler sched/deadline: Add documentation about GRUB reclaiming 2017-06-08 10:31:56 +02:00
scsi
security docs: Fix some formatting issues in request-key.rst 2017-05-18 10:46:25 -06:00
serial tty: n_gsm: do not send/receive in ldisc close path 2017-06-03 18:48:52 +09:00
sh docs-rst: convert sh book to ReST 2017-05-16 08:44:18 -03:00
sound sound updates for 4.13-rc1 2017-07-06 10:56:51 -07:00
sparc
sphinx Docs: clean up some DocBook loose ends 2017-06-23 14:17:38 -06:00
sphinx-static
spi spi: Document SPI slave controller support 2017-05-26 13:11:00 +01:00
sysctl
target Documentation/target: add an example script to configure an iSCSI target 2017-05-01 22:21:35 -07:00
thermal Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux 2017-05-12 11:58:45 -07:00
timers rcu: Eliminate NOCBs CPU-state Kconfig options 2017-06-08 18:52:43 -07:00
trace Char/Misc patches for 4.13-rc1 2017-07-03 20:55:59 -07:00
translations doc/kokr/howto: Only send regression fixes after -rc1 2017-06-22 10:25:22 -06:00
usb usb: gadget: add f_uac1 variant based on a new u_audio api 2017-06-19 09:22:47 +03:00
userspace-api doc: ReSTify no_new_privs.txt 2017-05-18 10:30:09 -06:00
virtual kvm: x86: hyperv: add KVM_CAP_HYPERV_SYNIC2 2017-07-13 17:41:04 +02:00
vm ksm: introduce ksm_max_page_sharing per page deduplication limit 2017-07-06 16:24:31 -07:00
w1
watchdog iTCO_wdt: all versions count down twice 2017-05-19 10:42:11 +02:00
wimax
x86 x86/mce: Update bootlog description to reflect behavior on AMD 2017-06-14 07:32:10 +02:00
xtensa of: update ePAPR references to point to Devicetree Specification 2017-06-22 11:22:06 -05:00
.gitignore
00-INDEX linux-kselftest-4.13-rc1-update 2017-07-07 14:04:47 -07:00
bcache.txt
bt8xxgpio.txt
btmrvl.txt
bus-virt-phys-mapping.txt
cachetlb.txt
cgroup-v2.txt mm/oom_kill: count global and memory cgroup oom kills 2017-07-06 16:24:35 -07:00
Changes
circular-buffers.txt
clk.txt
CodingStyle
conf.py Docs: Fix breakage with Sphinx 1.5 and upper 2017-06-23 13:45:37 -06:00
cpu-load.txt
cputopology.txt docs: Fix a couple typos 2017-04-27 15:54:39 -06:00
crc32.txt
dcdbas.txt
debugging-modules.txt
debugging-via-ohci1394.txt docs: Fix a couple typos 2017-04-27 15:54:39 -06:00
dell_rbu.txt
digsig.txt
DMA-API-HOWTO.txt dma-mapping: remove DMA_ERROR_CODE 2017-06-28 06:54:37 -07:00
DMA-API.txt Documentation: DMA API: fix a typo in a function name 2017-06-05 15:57:02 -06:00
DMA-attributes.txt
DMA-ISA-LPC.txt
docutils.conf
dontdiff GCC plugin updates: 2017-07-05 11:46:59 -07:00
efi-stub.txt
eisa.txt
flexible-arrays.txt
futex-requeue-pi.txt
gcc-plugins.txt
highuid.txt
hw_random.txt
hwspinlock.txt
index.rst Make the main documentation title less Geocities 2017-06-23 14:02:27 -06:00
Intel-IOMMU.txt
intel_txt.txt
io-mapping.txt
io_ordering.txt
iostats.txt
IPMI.txt
IRQ-affinity.txt
IRQ-domain.txt Documentation: Update IRQ-domain.txt to document irq_domain_mapping 2017-05-22 22:29:45 +02:00
IRQ.txt
irqflags-tracing.txt
isa.txt
isapnp.txt
kernel-doc-nano-HOWTO.txt docs: update old references for DocBook from the documentation 2017-05-16 08:44:19 -03:00
kernel-per-CPU-kthreads.txt rcu: Eliminate NOCBs CPU-state Kconfig options 2017-06-08 18:52:43 -07:00
kobject.txt
kprobes.txt
kref.txt
ldm.txt
lockup-watchdogs.txt
logo.gif
logo.txt
lsm.txt docs-rst: convert lsm from DocBook to ReST 2017-05-16 08:44:19 -03:00
lzo.txt
mailbox.txt
Makefile docs: remove DocBook from the building system 2017-05-16 08:44:19 -03:00
memory-barriers.txt There has been a fair amount of activity in the docs tree this time 2017-07-03 21:13:25 -07:00
memory-hotplug.txt
men-chameleon-bus.txt
nommu-mmap.txt
ntb.txt
numastat.txt
padata.txt
parport-lowlevel.txt
percpu-rw-semaphore.txt
phy.txt
pi-futex.txt
pnp.txt
preempt-locking.txt
printk-formats.txt vsprintf: Add %p extension "%pOF" for device tree 2017-06-27 12:36:40 -05:00
pwm.txt
rbtree.txt
remoteproc.txt
rfkill.txt
robust-futex-ABI.txt
robust-futexes.txt
rpmsg.txt
rtc.txt
SAK.txt
sgi-ioc4.txt
siphash.txt
SM501.txt
smsc_ece1099.txt
static-keys.txt docs: Fix a couple typos 2017-04-27 15:54:39 -06:00
SubmittingPatches
svga.txt
switchtec.txt
sync_file.txt sync_file.txt: standardize document format 2017-05-24 13:01:27 -03:00
tee.txt
this_cpu_ops.txt
unaligned-memory-access.txt
vfio-mediated-device.txt docs: Fix a spelling error in vfio-mediated-device.txt 2017-04-27 15:54:39 -06:00
vfio.txt
video-output.txt
xillybus.txt
xz.txt
zorro.txt docs: Fix a couple typos 2017-04-27 15:54:39 -06:00