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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
accelerators
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accounting
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acpi
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admin-guide
Documentation: Correct the possible MDS sysfs values
2019-05-14 19:18:00 +02:00
aoe
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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
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backlight
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block
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blockdev
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bpf
Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
2018-08-07 11:02:05 -07:00
bus-devices
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cdrom
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cgroup-v1
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cma
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connector
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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
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cpuidle
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crypto
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dev-tools
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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
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driver-api
USB: core: Fix bug caused by duplicate interface PM usage counter
2019-05-08 07:21:44 +02:00
driver-model
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early-userspace
initramfs: move gen_initramfs_list.sh from scripts/ to usr/
2018-08-22 23:21:44 +09:00
EDID
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extcon
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fault-injection
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fb
uvesafb: Fix URLs in the documentation
2018-09-26 18:11:23 +02:00
features
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filesystems
mm, proc: be more verbose about unstable VMA flags in /proc/<pid>/smaps
2019-01-26 09:32:44 +01:00
firmware_class
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fmc
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fpga
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gpio
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gpu
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hid
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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
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ide
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iio
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infiniband
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input
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ioctl
Merge tag 'char-misc-4.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
2018-08-18 11:04:51 -07:00
isdn
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kbuild
kbuild: Fix LOADLIBES rename in Documentation/kbuild/makefiles.txt
2018-08-22 23:21:42 +09:00
kdump
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kernel-hacking
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laptops
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leds
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lightnvm
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livepatch
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locking
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m68k
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maintainer
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md
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media
media: replace ADOBERGB by OPRGB
2018-11-13 11:08:54 -08:00
memory-devices
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mic
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mips
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misc-devices
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mmc
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mtd
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namespaces
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netlabel
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networking
ipv4: set the tcp_min_rtt_wlen range from 0 to one day
2019-05-02 09:58:59 +02:00
nfc
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nios2
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nvdimm
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nvmem
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openrisc
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parisc
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PCI
Merge branch 'remotes/lorenzo/pci/dwc'
2018-08-15 14:59:11 -05:00
pcmcia
pcmcia: remove long deprecated pcmcia_request_exclusive_irq() function
2018-08-18 12:30:42 -07:00
perf
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phy
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platform
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power
PM / reboot: Eliminate race between reboot and suspend
2018-08-06 12:35:20 +02:00
powerpc
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pps
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process
stable-kernel-rules.rst: add link to networking patch queue
2019-03-23 20:10:10 +01:00
pti
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ptp
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rapidio
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RCU
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riscv
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s390
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scheduler
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scsi
scsi: documentation: add scsi_mod.use_blk_mq to scsi-parameters
2018-08-27 12:26:10 -04:00
security
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serial
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sh
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sound
Merge tag 'asoc-v4.19' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
2018-08-13 12:12:31 +02:00
sparc
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sphinx
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sphinx-static
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spi
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sysctl
namei: allow restricted O_CREAT of FIFOs and regular files
2018-08-23 18:48:43 -07:00
target
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thermal
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timers
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trace
Merge tag 'docs-4.19' of git://git.lwn.net/linux
2018-08-14 14:29:31 -07:00
translations
Merge tag 'docs-4.19' of git://git.lwn.net/linux
2018-08-14 14:29:31 -07:00
usb
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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
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w1
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watchdog
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wimax
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x86
x86/speculation/mds: Improve CPU buffer clear documentation
2019-05-22 07:37:35 +02:00
xtensa
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.gitignore
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00-INDEX
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atomic_bitops.txt
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atomic_t.txt
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bt8xxgpio.txt
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btmrvl.txt
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bus-virt-phys-mapping.txt
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Changes
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clearing-warn-once.txt
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CodingStyle
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conf.py
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cpu-load.txt
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cputopology.txt
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crc32.txt
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dcdbas.txt
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debugging-modules.txt
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debugging-via-ohci1394.txt
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dell_rbu.txt
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digsig.txt
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DMA-API-HOWTO.txt
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DMA-API.txt
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DMA-attributes.txt
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DMA-ISA-LPC.txt
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docutils.conf
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dontdiff
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efi-stub.txt
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eisa.txt
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flexible-arrays.txt
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futex-requeue-pi.txt
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gcc-plugins.txt
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highuid.txt
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hw_random.txt
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hwspinlock.txt
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index.rst
x86/speculation/mds: Add mds_clear_cpu_buffers()
2019-05-14 19:17:54 +02:00
intel_txt.txt
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Intel-IOMMU.txt
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io_ordering.txt
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io-mapping.txt
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iostats.txt
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IPMI.txt
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IRQ-affinity.txt
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IRQ-domain.txt
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IRQ.txt
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irqflags-tracing.txt
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isa.txt
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isapnp.txt
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kernel-per-CPU-kthreads.txt
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kobject.txt
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kprobes.txt
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kref.txt
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ldm.txt
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lockup-watchdogs.txt
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logo.gif
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logo.txt
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lsm.txt
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lzo.txt
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mailbox.txt
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Makefile
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memory-barriers.txt
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memory-hotplug.txt
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men-chameleon-bus.txt
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nommu-mmap.txt
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ntb.txt
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numastat.txt
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padata.txt
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parport-lowlevel.txt
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percpu-rw-semaphore.txt
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phy.txt
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pi-futex.txt
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pnp.txt
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preempt-locking.txt
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pwm.txt
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rbtree.txt
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remoteproc.txt
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rfkill.txt
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robust-futex-ABI.txt
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robust-futexes.txt
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rpmsg.txt
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rtc.txt
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SAK.txt
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sgi-ioc4.txt
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siphash.txt
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SM501.txt
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smsc_ece1099.txt
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speculation.txt
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static-keys.txt
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SubmittingPatches
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svga.txt
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switchtec.txt
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sync_file.txt
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tee.txt
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this_cpu_ops.txt
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unaligned-memory-access.txt
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vfio-mediated-device.txt
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vfio.txt
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video-output.txt
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xillybus.txt
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xz.txt
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zorro.txt
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