Thomas Gleixner bc1241700a x86/speculation/mds: Add mitigation control for MDS ... Now that the mitigations are in place, add a command line parameter to control the mitigation, a mitigation selector function and a SMT update mechanism. This is the minimal straight forward initial implementation which just provides an always on/off mode. The command line parameter is: mds=[full|off] This is consistent with the existing mitigations for other speculative hardware vulnerabilities. The idle invocation is dynamically updated according to the SMT state of the system similar to the dynamic update of the STIBP mitigation. The idle mitigation is limited to CPUs which are only affected by MSBDS and not any other variant, because the other variants cannot be mitigated on SMT enabled systems. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Borislav Petkov <bp@suse.de> Reviewed-by: Jon Masters <jcm@redhat.com> Tested-by: Jon Masters <jcm@redhat.com>		2019-03-06 21:52:14 +01:00
..
ABI	Documentation/ABI: Correct mlxreg-io KernelVersion for 5.0	2019-01-26 11:30:26 -08:00
EDID	Docs/EDID: Calculate CRC while building the code	2018-11-06 07:36:22 -07:00
PCI	pci-v4.20-changes	2018-10-25 06:50:48 -07:00
RCU	doc: Fix "struction" typo in RCU memory-ordering documentation	2018-11-12 08:56:25 -08:00
accelerators	ocxl: Document new OCXL IOCTLs	2018-06-03 20:40:33 +10:00
accounting	psi: cgroup support	2018-10-26 16:26:32 -07:00
acpi	ACPI: property: graph: Update graph documentation to use generic references	2018-07-23 12:44:52 +02:00
admin-guide	x86/speculation/mds: Add mitigation control for MDS	2019-03-06 21:52:14 +01:00
aoe	…
arm	Documentation: Use "while" instead of "whilst"	2018-11-20 09:30:43 -07:00
arm64	arm64 festive updates for 4.21	2018-12-25 17:41:56 -08:00
auxdisplay	Doc: misc-devices: move lcd-panel-cgram.txt to auxdisplay/	2018-04-12 16:08:02 +02:00
backlight	…
block	block: doc: add slice_idle_us to bfq documentation	2019-01-09 07:38:48 -07:00
blockdev	zram: idle writeback fixes and cleanup	2019-01-08 17:15:10 -08:00
bpf	bpf, doc: update design qa to reflect kern_version requirement	2019-01-07 15:52:00 -08:00
bus-devices	…
cdrom	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
cgroup-v1	Merge branch 'for-4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup	2018-10-25 17:15:46 -07:00
cma	…
connector	…
console	Documentation: corrections to console/console.txt	2018-08-10 16:09:40 -06:00
core-api	XArray: Honour reserved entries in xa_insert	2019-01-06 22:12:58 -05:00
cpu-freq	Documentation: cpu-freq: Frequencies aren't always sorted	2018-11-07 13:29:04 +01:00
cpuidle	Documentation: admin-guide: PM: Add cpuidle document	2018-12-03 10:03:36 +01:00
crypto	crypto: skcipher - remove remnants of internal IV generators	2018-12-23 11:52:45 +08:00
dev-tools	A fairly normal cycle for documentation stuff. We have a new	2018-12-29 11:21:49 -08:00
device-mapper	Documentation: Use "while" instead of "whilst"	2018-11-20 09:30:43 -07:00
devicetree	A single fix for building DT bindings in-tree.	2019-02-02 10:34:32 -08:00
doc-guide	doc:process: add links where missing	2018-12-06 10:21:19 -07:00
driver-api	pci-v4.21-changes	2019-01-05 17:57:34 -08:00
driver-model	Documentation: driver core: remove use of BUS_ATTR	2019-01-08 15:17:45 +01:00
early-userspace	Correct gen_init_cpio tool's documentation	2018-11-25 12:25:53 -07:00
extcon	…
fault-injection	…
fb	fbdev: fbmem: convert CONFIG_FB_LOGO_CENTER into a cmd line option	2019-01-16 17:42:35 +01:00
features	Documentation/features: Add csky kernel features	2019-01-07 22:22:16 +08:00
filesystems	Documentation: driver core: remove use of BUS_ATTR	2019-01-08 15:17:45 +01:00
firmware_class	…
fmc	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
fpga	docs: fpga: add a document for FPGA Device Feature List (DFL) Framework Overview	2018-07-15 13:55:44 +02:00
gpio	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
gpu	A fairly normal cycle for documentation stuff. We have a new	2018-12-29 11:21:49 -08:00
hid	HID: doc: fix wrong data structure reference for UHID_OUTPUT	2018-12-18 14:55:22 +01:00
hwmon	hwmon: Introduce SENSOR_DEVICE_ATTR_{RO, RW, WO} and variants	2018-12-16 15:13:22 -08:00
i2c	i2c: add i2c bus driver for NVIDIA GPU	2018-11-09 17:46:43 +01:00
ia64	…
ide	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
iio	…
infiniband	…
input	Input: add `REL_WHEEL_HI_RES` and `REL_HWHEEL_HI_RES`	2018-12-07 16:27:11 +01:00
ioctl	seccomp: add a return code to trap to userspace	2018-12-11 16:28:41 -08:00
isdn	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
kbuild	kbuild: generate asm-generic wrappers if mandatory headers are missing	2019-01-06 09:46:51 +09:00
kdump	…
kernel-hacking	doc:it_IT: translation for kernel-hacking	2018-07-26 16:21:09 -06:00
laptops	platform-drivers-x86 for v4.20-1	2018-11-01 08:42:21 -07:00
leds	Documentation: Use "while" instead of "whilst"	2018-11-20 09:30:43 -07:00
lightnvm	…
livepatch	livepatch: Remove not longer valid limitations from the documentation	2018-05-24 15:37:57 +02:00
locking	This is a fairly typical cycle for documentation. There's some welcome	2018-10-24 18:01:11 +01:00
m68k	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
maintainer	docs: Fix more broken references	2018-06-15 18:11:26 -03:00
md	…
media	A fairly normal cycle for documentation stuff. We have a new	2018-12-29 11:21:49 -08:00
memory-devices	…
mic	…
mips	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
misc-devices	pci_endpoint_test: Add 2 ioctl commands	2018-07-19 11:46:57 +01:00
mmc	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
mtd	Documentation: mtd: remove stale pxa3xx NAND controller documentation	2018-09-04 23:37:38 +02:00
namespaces	…
netlabel	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
networking	net: dsa: Remove documentation for port_fdb_prepare	2019-02-23 18:38:00 -08:00
nfc	…
nios2	…
nvdimm	libnvdimm/security: Add documentation for nvdimm security support	2018-12-21 12:44:41 -08:00
nvmem	Documentation: nvmem: document cell tables and lookup entries	2018-09-28 15:14:54 +02:00
openrisc	…
parisc	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
pcmcia	pcmcia: remove long deprecated pcmcia_request_exclusive_irq() function	2018-08-18 12:30:42 -07:00
perf	Documentation: perf: Add documentation for ThunderX2 PMU uncore driver	2018-12-06 12:29:47 +00:00
phy	…
platform	…
power	Documentation: Use "while" instead of "whilst"	2018-11-20 09:30:43 -07:00
powerpc	powerpc/fadump: Reservationless firmware assisted dump	2018-12-21 11:32:49 +11:00
pps	…
process	Documentation: change linux-4.x references to 5.x	2019-02-17 15:41:05 -07:00
pti	…
ptp	…
rapidio	…
riscv	perf: riscv: Add Document for Future Porting Guide	2018-06-04 14:02:11 -07:00
s390	Documentation: Use "while" instead of "whilst"	2018-11-20 09:30:43 -07:00
scheduler	This is a fairly typical cycle for documentation. There's some welcome	2018-10-24 18:01:11 +01:00
scsi	SCSI misc on 20181224	2018-12-28 14:48:06 -08:00
security	Merge branch 'next-integrity' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security	2019-01-02 09:43:14 -08:00
serial	Documentation: Use "while" instead of "whilst"	2018-11-20 09:30:43 -07:00
sh	sh: remove board_time_init() callback	2018-12-18 16:13:04 +01:00
sound	Documentation: Use "while" instead of "whilst"	2018-11-20 09:30:43 -07:00
sparc	…
sphinx	Documentation/sphinx: allow "functions" with no parameters	2018-06-30 07:52:42 -06:00
sphinx-static	docs: improve readability for people with poorer eyesight	2018-10-07 09:16:50 -06:00
spi	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
sysctl	Documentation: Fix grammatical error in sysctl/fs.txt & clarify negative dentry	2019-02-11 09:10:22 -08:00
target	…
thermal	Documentation: Use "while" instead of "whilst"	2018-11-20 09:30:43 -07:00
timers	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
trace	Merge branches 'pm-cpuidle', 'pm-cpufreq' and 'pm-sleep'	2019-01-11 10:09:51 +01:00
translations	Documentation: change linux-4.x references to 5.x	2019-02-17 15:41:05 -07:00
usb	Documentation/usb: Fix typo	2018-11-26 16:56:34 +01:00
userspace-api	Merge branch 'next-seccomp' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security	2019-01-02 09:48:13 -08:00
virtual	Documentation/virtual/kvm: Update URL for AMD SEV API specification	2019-01-11 18:38:07 +01:00
vm	A fairly normal cycle for documentation stuff. We have a new	2018-12-29 11:21:49 -08:00
w1	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
watchdog	watchdog: docs: kernel-api: don't reference removed functions	2018-12-24 13:15:06 +01:00
wimax	…
x86	x86/speculation/mds: Conditionally clear CPU buffers on idle entry	2019-03-06 21:52:13 +01:00
xilinx	Documentation: xilinx: Add documentation for eemi APIs	2018-10-09 13:26:05 +02:00
xtensa	…
.gitignore	…
Changes	…
CodingStyle	…
DMA-API-HOWTO.txt	…
DMA-API.txt	dma-mapping: deprecate dma_zalloc_coherent	2018-12-20 08:14:09 +01:00
DMA-ISA-LPC.txt	…
DMA-attributes.txt	…
IPMI.txt	…
IRQ-affinity.txt	…
IRQ-domain.txt	…
IRQ.txt	…
Intel-IOMMU.txt	…
Makefile	kbuild: Add support for DT binding schema checks	2018-12-13 09:41:32 -06:00
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	This is a fairly typical cycle for documentation. There's some welcome	2018-10-24 18:01:11 +01:00
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	efi_stub: update documentation on dtb= parameter	2018-09-09 14:46:44 -06:00
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()	2019-03-06 21:52:12 +01:00
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	doc: Update removal of RCU-bh/sched update machinery	2018-08-30 10:59:48 -07:00
kobject.txt	kref/kobject: Improve documentation	2018-12-06 13:57:03 +01:00
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	Documentation: Use "while" instead of "whilst"	2018-11-20 09:30:43 -07:00
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	Documentation: preempt-locking: Use better example	2018-10-12 11:35:47 -06:00
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	Documentation: Use "while" instead of "whilst"	2018-11-20 09:30:43 -07:00
svga.txt	…
switchtec.txt	NTB: switchtec_ntb: Update switchtec documentation with prerequisites for NTB	2018-10-11 11:28:53 -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	…