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da28512156
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David Woodhouse da28512156 x86/spectre: Add boot time option to select Spectre v2 mitigation 
Add a spectre_v2= option to select the mitigation used for the indirect
branch speculation vulnerability.

Currently, the only option available is retpoline, in its various forms.
This will be expanded to cover the new IBRS/IBPB microcode features.

The RETPOLINE_AMD feature relies on a serializing LFENCE for speculation
control. For AMD hardware, only set RETPOLINE_AMD if LFENCE is a
serializing instruction, which is indicated by the LFENCE_RDTSC feature.

[ tglx: Folded back the LFENCE/AMD fixes and reworked it so IBRS
  	integration becomes simple ]

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: gnomes@lxorguk.ukuu.org.uk
Cc: Rik van Riel <riel@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: thomas.lendacky@amd.com
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Jiri Kosina <jikos@kernel.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Kees Cook <keescook@google.com>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linux-foundation.org>
Cc: Paul Turner <pjt@google.com>
Link: https://lkml.kernel.org/r/1515707194-20531-5-git-send-email-dwmw@amazon.co.uk
2018-01-12 00:14:29 +01:00
..
ABI sysfs/cpu: Fix typos in vulnerability documentation 2018-01-09 16:17:50 +01:00
accounting
acpi This is the bulk of GPIO changes for the v4.13 series: 2017-07-07 12:40:27 -07:00
admin-guide x86/spectre: Add boot time option to select Spectre v2 mitigation 2018-01-12 00:14:29 +01:00
aoe
arm Documentation: arm: Replace use of virt_to_phys with __pa_symbol 2017-07-17 13:43:58 -06:00
arm64 arm64: Expose DC CVAP to userspace 2017-08-09 11:00:35 +01:00
auxdisplay
backlight
blackfin samples: move blackfin gptimers-example from Documentation 2016-10-10 07:12:02 -06:00
block doc, block, bfq: better describe how to properly configure bfq 2017-08-31 13:55:26 -06:00
blockdev SCSI misc on 20170907 2017-09-07 21:11:05 -07:00
bus-devices
cdrom cdrom: Make device operations read-only 2017-02-14 08:29:56 -07:00
cgroup-v1 mm, vmpressure: pass-through notification support 2017-07-10 16:32:31 -07:00
cma
connector
console
core-api doc: Fix RCU's docbook options 2017-10-19 22:26:11 -04:00
cpu-freq cpufreq: docs: Drop intel-pstate.txt from index.txt 2017-09-28 02:08:43 +02:00
cpuidle
cris
crypto KEYS: Add documentation for asymmetric keyring restrictions 2017-07-14 11:01:38 +10:00
dev-tools docs: disable KASLR when debugging kernel 2017-07-17 14:49:01 -06:00
device-mapper dm raid: fix incorrect status output at the end of a "recover" process 2017-10-05 16:21:30 -04:00
devicetree Staging/IIO fixes for 4.14-rc6 2017-10-23 06:37:16 -04:00
dmaengine Merge branch 'topic/dmatest' into for-linus 2017-09-06 21:55:10 +05:30
doc-guide sphinx.rst: Allow Sphinx version 1.6 at the docs 2017-08-26 15:50:27 -06:00
driver-api PM: docs: Drop an excess character from devices.rst 2017-09-19 22:57:38 +02:00
driver-model driver core: remove DRIVER_ATTR 2017-09-19 09:20:33 +02:00
early-userspace Documentation: Fix dead URLs to ftp.kernel.org 2017-03-29 15:46:06 -06:00
EDID drm: use .hword to represent 16-bit numbers 2017-03-30 10:15:19 +02:00
extcon extcon: Remove porting compatibility of swich class 2017-04-06 10:55:24 +09:00
fault-injection fault-inject: add /proc/<pid>/fail-nth 2017-07-14 15:05:13 -07:00
fb fbcon: remove restriction on margin color 2017-09-04 16:00:49 +02:00
features docs/features: parisc implements tracehook 2017-08-07 14:18:40 -06:00
filesystems Merge branch 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs 2017-10-06 08:52:53 -07:00
firmware_class firmware: revamp firmware documentation 2017-01-11 09:42:59 +01:00
fmc
fpga fpga: Add scatterlist based programming 2017-02-10 15:20:44 +01:00
frv docs: fix locations of several documents that got moved 2016-10-24 08:12:35 -02:00
gpio Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2017-09-07 13:39:21 -07:00
gpu Merge tag 'drm-intel-next-2017-08-18' of git://anongit.freedesktop.org/git/drm-intel into drm-next 2017-08-22 10:03:07 +10:00
hid Documentation: hid: fix path to input bus definitions 2017-03-13 17:15:19 -06:00
hwmon hwmon: (pmbus/lm25066) Add support for TI LM5066I 2017-08-30 06:31:13 -07:00
i2c i2c: i801: Add support for Intel Cedar Fork 2017-10-05 14:44:56 +02:00
ia64
ide
iio iio: adc: New driver for Cirrus Logic EP93xx ADC 2017-07-25 19:56:23 +01:00
infiniband Documentation: Hardware tag matching 2017-08-29 08:30:21 -04:00
input Documentation:input: fix typo 2017-08-30 15:18:24 -06:00
ioctl scsi: cxlflash: Introduce host ioctl support 2017-06-26 15:01:11 -04:00
isdn docs: fix locations of several documents that got moved 2016-10-24 08:12:35 -02:00
kbuild kbuild doc: a bundle of fixes on makefiles.txt 2017-10-24 10:12:00 +09:00
kdump kexec/kdump: minor Documentation updates for arm64 and Image 2017-07-12 16:26:00 -07:00
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 platform/x86: thinkpad_acpi: Fix warning about deprecated hwmon_device_register 2017-08-18 15:57:24 -07:00
leds Documentaion: leds: leds-lp55xx.txt: Fix typos 2017-03-17 13:06:14 -06:00
lightnvm lightnvm: physical block device (pblk) target 2017-04-16 10:06:33 -06:00
livepatch livepatch: allow removal of a disabled patch 2017-03-08 09:38:43 +01:00
locking Merge branch 'linus' into locking/core, to fix up conflicts 2017-09-04 11:01:18 +02:00
m68k docs: fix locations of several documents that got moved 2016-10-24 08:12:35 -02:00
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: add qcom_camss.rst to v4l-drivers rst file 2017-09-05 07:28:25 -04:00
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 spi-nor: Add support for Intel SPI serial flash controller 2017-01-03 17:33:36 +00:00
namespaces
netlabel
networking doc: Fix typo "8023.ad" in bonding documentation 2017-10-07 23:19:13 +01:00
nfc
nios2
nvdimm
nvmem NVMEM documentation fix: A minor typo 2017-08-24 13:31:58 -06:00
parisc
PCI docs: update old references for DocBook from the documentation 2017-05-16 08:44:19 -03:00
pcmcia
perf perf: qcom: Add L3 cache PMU driver 2017-04-03 18:53:50 +01:00
phy
platform
power Merge branch 'pm-sleep' 2017-09-04 00:06:02 +02:00
powerpc powerpc updates for 4.13 2017-07-07 13:55:45 -07:00
pps drivers/pps: aesthetic tweaks to PPS-related content 2017-09-08 18:26:51 -07:00
process Documentation: Add Frank Rowand to list of enforcement statement endorsers 2017-11-04 11:52:39 +01:00
pti
ptp
rapidio
RCU doc: Set down RCU's scheduling-clock-interrupt needs 2017-08-17 07:31:14 -07:00
s390 docs: add documentation for vfio-ccw 2017-03-31 12:55:11 +02:00
scheduler sched/deadline: Add documentation about GRUB reclaiming 2017-06-08 10:31:56 +02:00
scsi scsi: make asynchronous aborts mandatory 2017-04-06 13:07:33 -04:00
security docs: ReSTify table of contents in core.rst 2017-08-30 15:27:58 -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 Documentation/sparc: Steps for sending break on sunhv console 2017-02-23 08:27:25 -08:00
sphinx Documentation/sphinx: fix kernel-doc decode for non-utf-8 locale 2017-08-31 13:36:28 -06:00
sphinx-static docs RTD theme: code-block with line nos - lines and line numbers don't line up. 2017-07-17 13:48:45 -06:00
spi spi: Document SPI slave controller support 2017-05-26 13:11:00 +01:00
sysctl Major additions: 2017-09-22 16:16:41 -10:00
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 stm class: Document the stm_ftrace 2017-08-25 17:58:34 +03:00
translations kokr/memory-barriers.txt: Apply atomic_t.txt change 2017-09-08 10:10:53 -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 seccomp: Implement SECCOMP_RET_KILL_PROCESS action 2017-08-14 13:46:50 -07:00
virtual KVM/ARM Changes for v4.14 2017-09-07 18:22:04 +02:00
vm hmm: heterogeneous memory management documentation 2017-09-08 18:26:45 -07:00
w1 w1: add documentation for w1_ds2438 2017-03-17 15:10:49 +09:00
watchdog watchdog: Revert "iTCO_wdt: all versions count down twice" 2017-09-09 17:41:24 +02:00
wimax
x86 x86/Documentation: Add PTI description 2018-01-06 21:39:10 +01:00
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
atomic_bitops.txt Documentation/locking/atomic: Add documents for new atomic_t APIs 2017-08-10 12:29:00 +02:00
atomic_t.txt Documentation/locking/atomic: Finish the document... 2017-08-25 11:06:33 +02:00
bcache.txt bcache.txt: standardize document format 2017-07-14 13:51:27 -06:00
bt8xxgpio.txt bt8xxgpio.txt: standardize document format 2017-07-14 13:51:27 -06:00
btmrvl.txt btmrvl.txt: standardize document format 2017-07-14 13:51:27 -06:00
bus-virt-phys-mapping.txt bus-virt-phys-mapping.txt: standardize document format 2017-07-14 13:51:28 -06:00
cachetlb.txt cachetlb.txt: standardize document format 2017-07-14 13:51:28 -06:00
cgroup-v2.txt cgroup: add cgroup.stat interface with basic hierarchy stats 2017-08-02 12:05:20 -07:00
Changes docs: add back 'Documentation/Changes' file (as symlink) 2016-12-14 16:30:12 -08:00
circular-buffers.txt circular-buffers.txt: standardize document format 2017-07-14 13:51:29 -06:00
clk.txt clk.txt: standardize document format 2017-07-14 13:51:29 -06:00
CodingStyle doc: re-add CodingStyle and SubmittingPatches 2016-10-24 08:12:35 -02:00
conf.py docs-rst: don't require adjustbox anymore 2017-09-08 10:02:55 -06:00
cpu-load.txt cpu-load: standardize document format 2017-07-14 13:51:30 -06:00
cputopology.txt cputopology.txt: standardize document format 2017-07-14 13:51:30 -06:00
crc32.txt crc32.txt: standardize document format 2017-07-14 13:51:30 -06:00
dcdbas.txt dcdbas.txt: standardize document format 2017-07-14 13:51:31 -06:00
debugging-modules.txt
debugging-via-ohci1394.txt debugging-via-ohci1394.txt: standardize document format 2017-07-14 13:51:34 -06:00
dell_rbu.txt dell_rbu.txt: standardize document format 2017-07-14 13:58:12 -06:00
digsig.txt digsig.txt: standardize document format 2017-07-14 13:51:31 -06:00
DMA-API-HOWTO.txt DMA-API-HOWTO.txt: standardize document format 2017-07-14 13:51:32 -06:00
DMA-API.txt dma-coherent: remove the DMA_MEMORY_MAP and DMA_MEMORY_IO flags 2017-09-01 11:59:17 +02:00
DMA-attributes.txt DMA-attributes.txt: standardize document format 2017-07-14 13:51:33 -06:00
DMA-ISA-LPC.txt DMA-ISA-LPC.txt: standardize document format 2017-07-14 13:51:33 -06:00
docutils.conf
dontdiff Remove gperf usage from toolchain 2017-08-19 11:02:53 -07:00
efi-stub.txt efi-stub.txt: standardize document format 2017-07-14 13:51:34 -06:00
eisa.txt eisa.txt: standardize document format 2017-07-14 13:51:34 -06:00
errseq.rst Documentation: add some docs for errseq_t 2017-07-29 09:01:02 -04:00
flexible-arrays.txt flexible-arrays.txt: standardize document format 2017-07-14 13:51:35 -06:00
futex-requeue-pi.txt futex-requeue-pi.txt: standardize document format 2017-07-14 13:51:35 -06:00
gcc-plugins.txt gcc-plugins.txt: standardize document format 2017-07-14 13:51:36 -06:00
highuid.txt highuid.txt: standardize document format 2017-07-14 13:51:36 -06:00
hw_random.txt hw_random.txt: standardize document format 2017-07-14 13:51:37 -06:00
hwspinlock.txt hwspinlock.txt: standardize document format 2017-07-14 13:51:37 -06:00
index.rst Make the main documentation title less Geocities 2017-06-23 14:02:27 -06:00
intel_txt.txt intel_txt.txt: standardize document format 2017-07-14 13:51:38 -06:00
Intel-IOMMU.txt Intel-IOMMU.txt: standardize document format 2017-07-14 13:51:38 -06:00
io_ordering.txt io_ordering.txt: standardize document format 2017-07-14 13:51:39 -06:00
io-mapping.txt io-mapping.txt: standardize document format 2017-07-14 13:51:38 -06:00
iostats.txt iostats.txt: update it to cover recent Kernels 2017-07-14 13:51:40 -06:00
IPMI.txt IPMI.txt: standardize document format 2017-07-14 13:51:40 -06:00
IRQ-affinity.txt IRQ-affinity.txt: standardize document format 2017-07-14 13:51:41 -06:00
IRQ-domain.txt IRQ-domain.txt: standardize document format 2017-07-14 13:51:41 -06:00
IRQ.txt IRQ.txt: add a markup for its title 2017-07-14 13:51:42 -06:00
irqflags-tracing.txt irqflags-tracing.txt: standardize document format 2017-07-14 13:51:42 -06:00
isa.txt isa.txt: standardize document format 2017-07-14 13:51:43 -06:00
isapnp.txt isapnp.txt: promote title level 2017-07-14 13:51:43 -06:00
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 kernel-per-CPU-kthreads.txt: standardize document format 2017-07-14 13:51:43 -06:00
kobject.txt kobject.txt: standardize document format 2017-07-14 13:51:44 -06:00
kprobes.txt docs: kprobes.txt: Fix whitespacing 2017-07-14 13:58:14 -06:00
kref.txt kref.txt: standardize document format 2017-07-14 13:51:45 -06:00
ldm.txt ldm.txt: standardize document format 2017-07-14 13:51:45 -06:00
lockup-watchdogs.txt lockup-watchdogs.txt: standardize document format 2017-07-14 13:51:46 -06:00
logo.gif
logo.txt
lsm.txt docs-rst: convert lsm from DocBook to ReST 2017-05-16 08:44:19 -03:00
lzo.txt lzo.txt: standardize document format 2017-07-14 13:51:46 -06:00
mailbox.txt mailbox.txt: standardize document format 2017-07-14 13:51:47 -06:00
Makefile doc: Makefile: if sphinx is not found, run a check script 2017-08-24 13:18:30 -06:00
memory-barriers.txt Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-09-04 11:52:29 -07:00
memory-hotplug.txt memory-hotplug.txt: standardize document format 2017-07-14 13:57:53 -06:00
men-chameleon-bus.txt men-chameleon-bus.txt: standardize document format 2017-07-14 13:57:54 -06:00
nommu-mmap.txt nommu-mmap.txt: don't use all upper case on titles 2017-07-14 13:57:55 -06:00
ntb.txt This series converts a number of top-level documents to the RST format 2017-07-15 12:58:58 -07:00
numastat.txt numastat.txt: standardize document format 2017-07-14 13:57:56 -06:00
padata.txt padata.txt: standardize document format 2017-07-14 13:57:56 -06:00
parport-lowlevel.txt parport-lowlevel.txt: standardize document format 2017-07-14 13:57:57 -06:00
percpu-rw-semaphore.txt percpu-rw-semaphore.txt: standardize document format 2017-07-14 13:57:58 -06:00
phy.txt phy.txt: standardize document format 2017-07-14 13:57:58 -06:00
pi-futex.txt pi-futex.txt: standardize document format 2017-07-14 13:57:59 -06:00
pnp.txt pnp.txt: standardize document format 2017-07-14 13:57:59 -06:00
preempt-locking.txt preempt-locking.txt: standardize document format 2017-07-14 13:58:00 -06:00
printk-formats.txt printk-formats.txt: Add examples for %pF and %pS usage 2017-08-24 18:49:52 +02:00
pwm.txt pwm: Standardize document format 2017-07-06 08:23:30 +02:00
rbtree.txt rbtree: cache leftmost node internally 2017-09-08 18:26:48 -07:00
remoteproc.txt remoteproc.txt: standardize document format 2017-07-14 13:58:02 -06:00
rfkill.txt rfkill.txt: standardize document format 2017-07-14 13:58:02 -06:00
robust-futex-ABI.txt robust-futex-ABI.txt: standardize document format 2017-07-14 13:58:03 -06:00
robust-futexes.txt robust-futexes.txt: standardize document format 2017-07-14 13:58:03 -06:00
rpmsg.txt rpmsg.txt: standardize document format 2017-07-14 13:58:04 -06:00
rtc.txt rtc: add generic nvmem support 2017-07-07 13:14:14 +02:00
SAK.txt SAK.txt: standardize document format 2017-07-14 13:58:04 -06:00
sgi-ioc4.txt sgi-ioc4.txt: standardize document format 2017-07-14 13:58:05 -06:00
siphash.txt siphash.txt: standardize document format 2017-07-14 13:58:06 -06:00
SM501.txt SM501.txt: standardize document format 2017-07-14 13:58:06 -06:00
smsc_ece1099.txt smsc_ece1099.txt: standardize document format 2017-07-14 13:58:07 -06:00
static-keys.txt jump_label: Provide hotplug context variants 2017-08-10 12:28:59 +02:00
SubmittingPatches doc: re-add CodingStyle and SubmittingPatches 2016-10-24 08:12:35 -02:00
svga.txt svga.txt: standardize document format 2017-07-14 13:58:08 -06:00
switchtec.txt switchtec: Add IOCTLs to the Switchtec driver 2017-04-12 12:23:37 -05:00
sync_file.txt sync_file.txt: standardize document format 2017-05-24 13:01:27 -03:00
tee.txt tee.txt: standardize document format 2017-07-14 13:58:14 -06:00
this_cpu_ops.txt this_cpu_ops.txt: standardize document format 2017-07-14 13:58:08 -06:00
unaligned-memory-access.txt unaligned-memory-access.txt: standardize document format 2017-07-14 13:58:09 -06:00
vfio-mediated-device.txt vfio-mediated-device.txt: standardize document format 2017-07-14 13:58:10 -06:00
vfio.txt vfio.txt: standardize document format 2017-07-14 13:58:10 -06:00
video-output.txt
xillybus.txt xillybus.txt: standardize document format 2017-07-14 13:58:11 -06:00
xz.txt xz.txt: standardize document format 2017-07-14 13:58:11 -06:00
zorro.txt zorro.txt: standardize document format 2017-07-14 13:58:12 -06:00