Andy Lutomirski b185029f5c x86/speculation/mds: Improve CPU buffer clear documentation ... commit 9d8d0294e7 upstream. 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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2019-05-22 07:37:35 +02:00
..
ABI	Documentation: Add MDS vulnerability documentation	2019-05-14 19:17:58 +02:00
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	Documentation: Correct the possible MDS sysfs values	2019-05-14 19:18:00 +02:00
aoe	…
arm	ARM: 8833/1: Ensure that NEON code always compiles with Clang	2019-04-05 22:33:08 +02:00
arm64	clocksource/drivers/arch_timer: Workaround for Allwinner A64 timer instability	2019-03-23 20:09:58 +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	…
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	idr: Change documentation license	2018-10-15 16:31:29 -04:00
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	dt-bindings: eeprom: at24: add "atmel,24c2048" compatible string	2019-02-20 10:25:35 +01:00
doc-guide	Documentation/sphinx: allow "functions" with no parameters	2018-06-30 07:52:42 -06:00
driver-api	USB: core: Fix bug caused by duplicate interface PM usage counter	2019-05-08 07:21:44 +02:00
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	…
fb	uvesafb: Fix URLs in the documentation	2018-09-26 18:11:23 +02:00
features	ARM: 8777/1: Hook up SYNC_CORE functionality for sys_membarrier()	2018-07-11 11:02:08 +01:00
filesystems	mm, proc: be more verbose about unstable VMA flags in /proc/<pid>/smaps	2019-01-26 09:32:44 +01:00
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	…
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: i801: Add support for Intel Comet Lake	2019-05-04 09:20:15 +02:00
ia64	…
ide	…
iio	…
infiniband	…
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	…
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	…
media	media: replace ADOBERGB by OPRGB	2018-11-13 11:08:54 -08:00
memory-devices	…
mic	…
mips	…
misc-devices	pci_endpoint_test: Add 2 ioctl commands	2018-07-19 11:46:57 +01:00
mmc	…
mtd	…
namespaces	…
netlabel	…
networking	ipv4: set the tcp_min_rtt_wlen range from 0 to one day	2019-05-02 09:58:59 +02:00
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	…
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	stable-kernel-rules.rst: add link to networking patch queue	2019-03-23 20:10:10 +01:00
pti	…
ptp	…
rapidio	…
riscv	perf: riscv: Add Document for Future Porting Guide	2018-06-04 14:02:11 -07:00
s390	…
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	…
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	…
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	x86/speculation: Add prctl() control for indirect branch speculation	2018-12-05 19:32:04 +01:00
virtual	KVM: Reject device ioctls from processes other than the VM's creator	2019-04-03 06:26:29 +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	…
wimax	…
x86	x86/speculation/mds: Improve CPU buffer clear documentation	2019-05-22 07:37:35 +02:00
xtensa	…
.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	…
IRQ.txt	…
Intel-IOMMU.txt	…
Makefile	…
SAK.txt	…
SM501.txt	…
SubmittingPatches	…
atomic_bitops.txt	…
atomic_t.txt	…
bt8xxgpio.txt	…
btmrvl.txt	…
bus-virt-phys-mapping.txt	…
clearing-warn-once.txt	…
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	x86/speculation/mds: Add mds_clear_cpu_buffers()	2019-05-14 19:17:54 +02:00
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	…
sgi-ioc4.txt	…
siphash.txt	…
smsc_ece1099.txt	…
speculation.txt	…
static-keys.txt	…
svga.txt	…
switchtec.txt	…
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	…