linux/Documentation
Andy Lutomirski 9d8d0294e7 x86/speculation/mds: Improve CPU buffer clear documentation
On x86_64, all returns to usermode go through
prepare_exit_to_usermode(), with the sole exception of do_nmi().
This even includes machine checks -- this was added several years
ago to support MCE recovery.  Update the documentation.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@suse.de>
Cc: Frederic Weisbecker <frederic@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jon Masters <jcm@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Fixes: 04dcbdb805 ("x86/speculation/mds: Clear CPU buffers on exit to user")
Link: http://lkml.kernel.org/r/999fa9e126ba6a48e9d214d2f18dbde5c62ac55c.1557865329.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-05-16 09:05:12 +02:00
..
ABI Merge branch 'x86-mds-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-05-14 07:57:29 -07:00
accelerators
accounting psi: introduce psi monitor 2019-05-14 19:52:48 -07:00
acpi/dsd LED updates for 5.2-rc1. 2019-05-07 18:02:51 -07:00
admin-guide ipc: allow boot time extension of IPCMNI from 32k to 16M 2019-05-14 19:52:52 -07:00
aoe
arm ARM: 8833/1: Ensure that NEON code always compiles with Clang 2019-02-12 15:20:09 +00:00
arm64 Merge branch 'for-next/perf' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into for-next/core 2019-05-03 10:18:08 +01:00
auxdisplay
backlight
block block: null: Add documentation for "zone_nr_conv" param 2019-04-09 08:18:23 -06:00
blockdev zram: idle writeback fixes and cleanup 2019-01-08 17:15:10 -08:00
bpf docs/btf: fix the missing section marks 2019-05-09 15:59:59 -07:00
bus-devices
cdrom
cgroup-v1 A fairly routine cycle for docs - lots of typo fixes, some new documents, 2019-03-09 09:56:17 -08:00
cma
connector
console
core-api lib: Move mathematic helpers to separate folder 2019-05-14 19:52:49 -07:00
cpu-freq Documentation: cpu-freq: Frequencies aren't always sorted 2018-11-07 13:29:04 +01:00
crypto crypto: shash - remove shash_desc::flags 2019-04-25 15:38:12 +08:00
dev-tools gcov: docs: add a note on GCC vs Clang differences 2019-05-14 19:52:51 -07:00
device-mapper dm cache: add support for discard passdown to the origin device 2019-03-05 14:53:52 -05:00
devicetree dt-bindings: pps: pps-gpio PPS ECHO implementation 2019-05-14 19:52:51 -07:00
doc-guide docs: doc-guide: remove the extension from .rst files 2019-04-19 12:46:27 -06:00
driver-api This is the bulk of the GPIO changes for the v5.2 kernel cycle: 2019-05-11 10:54:43 -04:00
driver-model drm-misc-next for 5.2: 2019-03-25 11:05:12 +01:00
early-userspace Correct gen_init_cpio tool's documentation 2018-11-25 12:25:53 -07:00
EDID Docs/EDID: Calculate CRC while building the code 2018-11-06 07:36:22 -07:00
extcon
fault-injection doc: fault-injection: fix macro name in example 2019-01-07 15:36:11 -07:00
fb fbdev: fbmem: convert CONFIG_FB_LOGO_CENTER into a cmd line option 2019-01-16 17:42:35 +01:00
features 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
filesystems autofs: add description of ignore pseudo mount option 2019-05-14 19:52:50 -07:00
firmware_class
firmware-guide Documentation: ACPI: move video_extension.txt to firmware-guide/acpi and convert to reST 2019-04-25 23:07:20 +02:00
fmc
fpga
gpio docs: gpio: convert docs to ReST and rename to *.rst 2019-04-23 23:30:07 +02:00
gpu drm: add drm_format_helper.c to kerneldoc 2019-04-17 09:39:22 +02:00
hid HID: doc: fix wrong data structure reference for UHID_OUTPUT 2018-12-18 14:55:22 +01:00
hwmon hwmon: (lm75) Add support for TMP75B 2019-05-03 13:16:18 -07:00
i2c i2c-piix4: Add Hygon Dhyana SMBus support 2019-05-03 16:47:54 +02:00
ia64
ide
iio
infiniband Documentation/infiniband: update from locked to pinned_vm 2019-02-07 12:56:23 -07:00
input doc: Change LXR references to elixir.bootlin.com 2019-02-01 16:05:03 -07:00
interconnect interconnect: Add generic on-chip interconnect API 2019-01-22 13:37:25 +01:00
ioctl seccomp: add a return code to trap to userspace 2018-12-11 16:28:41 -08:00
isdn
kbuild moduleparam: Save information about built-in modules in separate file 2019-05-07 21:50:24 +09:00
kdump kdump: Document kernel data exported in the vmcoreinfo note 2019-01-15 11:05:28 +01:00
kernel-hacking
laptops Documentation: fix lg-laptop.rst warnings 2019-02-11 08:27:47 -07:00
leds Documentation: Use "while" instead of "whilst" 2018-11-20 09:30:43 -07:00
lightnvm
livepatch docs/livepatch: Unify style of livepatch documentation in the ReST format 2019-05-07 16:06:28 -06:00
locking Documentation/locking/lockdep: Drop last two chars of sample states 2019-03-04 12:55:18 -07:00
m68k
maintainer
md
media media updates for v5.1-rc1 2019-05-08 11:13:17 -07:00
memory-devices
mic
mips
misc-devices Documentation: add ibmvmc to toctree(index) and fix warnings 2019-01-14 08:37:17 -07:00
mmc
mtd
namespaces
netlabel
networking Documentation: net: dsa: sja1105: Add info about supported traffic modes 2019-05-05 21:52:42 -07:00
nfc
nios2
nvdimm libnvdimm/security: Add documentation for nvdimm security support 2018-12-21 12:44:41 -08:00
nvmem
openrisc
parisc
PCI
pcmcia
perf Documentation: perf: Add documentation for ThunderX2 PMU uncore driver 2018-12-06 12:29:47 +00:00
phy
platform
power PM/EM: Document the Energy Model framework 2019-01-27 12:29:37 +01:00
powerpc Documentation: powerpc: Expand the DAWR acronym 2019-05-03 02:54:58 +10:00
pps
process A reasonably busy cycle for docs, including: 2019-05-08 12:42:50 -07:00
pti
ptp
rapidio
RCU doc: Fix typos and otherwise modernize checklist.txt 2019-03-26 14:37:06 -07:00
riscv
s390 Documentation: Use "while" instead of "whilst" 2018-11-20 09:30:43 -07:00
scheduler sched/doc: Document Energy Aware Scheduling 2019-01-27 12:29:37 +01:00
scsi scsi: ufs-bsg: Allow reading descriptors 2019-02-27 09:00:02 -05:00
security doc: security: Add kern-doc for lsm_hooks.h 2019-02-22 08:54:09 -07:00
serial docs: serial: convert docs to ReST and rename to *.rst 2019-04-25 11:37:42 +02:00
sh sh: remove board_time_init() callback 2018-12-18 16:13:04 +01:00
sound ALSA: doc: my_chip has no element ioport 2019-04-03 11:55:47 +02:00
sparc docs: sparc: convert to ReST 2019-05-08 17:13:35 -07:00
sphinx
sphinx-static
spi spi-summary: document set_cs_timing 2019-04-08 14:13:43 +07:00
sysctl userfaultfd/sysctl: add vm.unprivileged_userfaultfd 2019-05-14 09:47:45 -07:00
target scsi: target/core: Remove the write_pending_status() callback function 2019-02-04 21:23:59 -05:00
thermal docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
timers Docs: Correct /proc/stat path 2019-02-22 08:50:17 -07:00
trace mm: move recent_rotated pages calculation to shrink_inactive_list() 2019-05-14 09:47:45 -07:00
translations Some late arriving documentation changes. In particular, this contains the 2019-05-10 13:24:53 -04:00
usb docs: usb: convert documents to ReST 2019-04-16 12:16:19 +02:00
userspace-api Documentation: seccomp: unify list indentation 2019-03-18 12:00:28 -06:00
virtual KVM: fix KVM_CLEAR_DIRTY_LOG for memory slots of unaligned size 2019-04-30 21:22:15 +02:00
vm mm/hmm: add default fault flags to avoid the need to pre-fill pfns arrays 2019-05-14 09:47:48 -07:00
w1
watchdog Documentation/watchdog: Add documentation mlx-wdt driver 2019-03-02 15:28:20 +01:00
wimax
x86 x86/speculation/mds: Improve CPU buffer clear documentation 2019-05-16 09:05:12 +02:00
xilinx
xtensa xtensa: document boot parameter passing 2019-02-03 18:06:19 -08:00
.gitignore
atomic_bitops.txt docs: atomic_bitops.txt: add a title for this document 2019-04-11 12:37:02 -06:00
atomic_t.txt Documentation/atomic_t: Clarify signed vs unsigned 2019-03-18 10:27:52 -07:00
bt8xxgpio.txt
btmrvl.txt
bus-virt-phys-mapping.txt
Changes
clearing-warn-once.txt A reasonably busy cycle for docs, including: 2019-05-08 12:42:50 -07:00
CodingStyle
conf.py
cpu-load.txt
cputopology.txt topology: Simplify cputopology.txt formatting and wording 2019-04-19 10:56:04 +02:00
crc32.txt
dcdbas.txt
debugging-modules.txt
debugging-via-ohci1394.txt
dell_rbu.txt
digsig.txt
DMA-API-HOWTO.txt DMA mapping updates for 5.2 2019-05-09 08:40:55 -07:00
DMA-API.txt virtio: fixes, cleanups 2019-03-10 12:47:57 -07:00
DMA-attributes.txt
DMA-ISA-LPC.txt Documentation/DMA-ISA-LPC: fix an incorrect reference 2019-02-11 08:23:07 -07:00
docutils.conf
dontdiff A reasonably busy cycle for docs, including: 2019-05-08 12:42:50 -07:00
efi-stub.txt
eisa.txt
futex-requeue-pi.txt
gcc-plugins.txt
highuid.txt
hw_random.txt
hwspinlock.txt
index.rst Merge branch 'x86-mds-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-05-14 07:57:29 -07:00
intel_txt.txt
Intel-IOMMU.txt
io_ordering.txt
io-mapping.txt
iostats.txt
IPMI.txt
IRQ-affinity.txt
IRQ-domain.txt
IRQ.txt
irqflags-tracing.txt
isa.txt
isapnp.txt
kernel-per-CPU-kthreads.txt
kobject.txt kref/kobject: Improve documentation 2018-12-06 13:57:03 +01:00
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
ldm.txt
lockup-watchdogs.txt
logo.gif
logo.txt
lsm.txt
lzo.txt lib/lzo: fix bugs for very short or empty input 2019-04-05 16:02:30 -10:00
mailbox.txt
Makefile docs: Makefile: use latexmk if available 2019-04-01 14:33:42 -06:00
memory-barriers.txt docs/memory-barriers.txt: Update I/O section to be clearer about CPU vs thread 2019-04-23 13:34:17 +01:00
men-chameleon-bus.txt
nommu-mmap.txt
ntb.txt docs: ntb.txt: add blank lines to clean up some Sphinx warnings 2019-04-11 12:37:03 -06:00
numastat.txt
packing.txt lib: Add support for generic packing operations 2019-05-03 10:49:17 -04:00
padata.txt
parport-lowlevel.txt
percpu-rw-semaphore.txt
phy.txt
pi-futex.txt
pnp.txt
preempt-locking.txt x86/fpu: Remove fpu__restore() 2019-04-09 19:27:42 +02:00
pwm.txt
rbtree.txt
remoteproc.txt
rfkill.txt
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
rtc.txt Documentation: rtc: Correct location of rtctest.c 2019-03-25 10:34:55 -06:00
SAK.txt
sgi-ioc4.txt
siphash.txt
SM501.txt
smsc_ece1099.txt
speculation.txt docs: speculation.txt: mark example blocks as such 2019-04-11 12:37:03 -06:00
static-keys.txt static_keys.txt: Fix trivial spelling mistake 2019-02-06 16:44:16 -07:00
SubmittingPatches
svga.txt
switchtec.txt
sync_file.txt
tee.txt
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
vfio-mediated-device.txt
vfio.txt
video-output.txt docs: video-output.txt: convert it to ReST format 2019-04-11 12:37:03 -06:00
xillybus.txt
xz.txt
zorro.txt