Pawan Gupta 66d5260fc7 x86/rfds: Mitigate Register File Data Sampling (RFDS) ... commit 8076fcde016c9c0e0660543e67bff86cb48a7c9c upstream. RFDS is a CPU vulnerability that may allow userspace to infer kernel stale data previously used in floating point registers, vector registers and integer registers. RFDS only affects certain Intel Atom processors. Intel released a microcode update that uses VERW instruction to clear the affected CPU buffers. Unlike MDS, none of the affected cores support SMT. Add RFDS bug infrastructure and enable the VERW based mitigation by default, that clears the affected buffers just before exiting to userspace. Also add sysfs reporting and cmdline parameter "reg_file_data_sampling" to control the mitigation. For details see: Documentation/admin-guide/hw-vuln/reg-file-data-sampling.rst [ pawan: - Resolved conflicts in sysfs reporting. - s/ATOM_GRACEMONT/ALDERLAKE_N/ATOM_GRACEMONT is called ALDERLAKE_N in 6.6. ] Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Josh Poimboeuf <jpoimboe@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2024-04-13 12:58:59 +02:00
..
ABI	x86/rfds: Mitigate Register File Data Sampling (RFDS)	2024-04-13 12:58:59 +02:00
accounting	psi: Fix uaf issue when psi trigger is destroyed while being polled	2022-02-05 12:37:55 +01:00
admin-guide	x86/rfds: Mitigate Register File Data Sampling (RFDS)	2024-04-13 12:58:59 +02:00
arm	ARM: 9012/1: move device tree mapping out of linear region	2021-05-19 10:13:18 +02:00
arm64	perf/smmuv3: Enable HiSilicon Erratum 162001900 quirk for HIP08/09	2023-09-23 11:01:05 +02:00
block	block: introduce zone_write_granularity limit	2024-04-13 12:58:07 +02:00
bpf	bpf: Migrate from patchwork.ozlabs.org to patchwork.kernel.org.	2020-10-11 22:05:47 +02:00
cdrom
core-api	kernel.h: split out kstrtox() and simple_strtox() to a separate header	2023-06-21 15:45:35 +02:00
cpu-freq
crypto	crypto: af_alg - add extra parameters for DRBG interface	2020-09-25 17:48:52 +10:00
dev-tools	docs/scripts/gdb: add necessary make scripts_gdb step	2023-03-11 16:39:52 +01:00
devicetree	dt-bindings: nvmem: mxs-ocotp: Document fsl,ocotp	2024-01-05 15:12:28 +01:00
doc-guide	docs: kerneldoc.py: add support for kerneldoc -nosymbol	2020-10-15 07:49:38 +02:00
driver-api	spi: Update reference to struct spi_controller	2023-01-14 10:15:26 +01:00
fault-injection	debugfs: fix error when writing negative value to atomic_t debugfs file	2023-01-14 10:15:19 +01:00
fb	drm fixes (round two) for 5.10-rc1	2020-10-23 13:56:34 -07:00
features	s390 updates for the 5.10 merge window	2020-10-16 12:36:38 -07:00
filesystems	rename(): fix the locking of subdirectories	2024-02-23 08:41:54 +01:00
firmware_class
firmware-guide	Documentation: ACPI: EINJ: Fix obsolete example	2022-08-25 11:37:53 +02:00
fpga
gpu	Revert "fbcon: Disable accelerated scrolling"	2022-02-08 18:30:40 +01:00
hid
hwmon	hwmon: (lm90) Add basic support for TI TMP461	2021-12-29 12:25:59 +01:00
i2c	Documentation: i2c: add testunit docs to index	2020-10-05 22:57:45 +02:00
ia64
ide
iio
infiniband
input	Input: iforce - add support for Boeder Force Feedback Wheel	2022-09-20 12:38:32 +02:00
isdn
kbuild	Documentation/Kbuild: Remove references to gcc-plugin.sh	2021-12-14 11:32:46 +01:00
kernel-hacking	docs: futex: Fix kernel-doc references after code split-up preparation	2023-04-26 11:27:40 +02:00
leds	docs: leds: index.rst: add a missing file	2020-11-02 13:45:37 +01:00
litmus-tests
livepatch
locking	Documentation/locking/locktypes: Update migrate_disable() bits.	2021-12-14 11:32:42 +01:00
m68k
maintainer
mhi
mips	dt: Remove booting-without-of.rst	2020-10-13 13:33:16 -05:00
misc-devices	Documentation: remove mic/index from misc-devices/index.rst	2020-11-04 11:38:32 +01:00
netlabel
networking	net: change accept_ra_min_rtr_lft to affect all RA lifetimes	2023-10-25 11:54:14 +02:00
nios2
nvdimm
openrisc
parisc
PCI	Documentation: better locations for sysfs-pci, sysfs-tagging	2020-10-09 09:33:23 -06:00
pcmcia
power	PCI/PM: Rename pci_dev.d3_delay to d3hot_delay	2020-09-29 14:21:50 -05:00
powerpc	powerpc/doc: Fix htmldocs errors	2023-04-26 11:27:37 +02:00
process	overflow: Implement size_t saturating arithmetic helpers	2023-11-20 11:06:44 +01:00
RCU	Merge branch 'for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu	2020-10-09 08:21:56 +02:00
riscv
s390
scheduler
scsi	scsi: core: Fix the scsi_set_resid() documentation	2023-09-19 12:20:21 +02:00
security	watch_queue: Drop references to /dev/watch_queue	2021-03-04 11:37:59 +01:00
sh	dt: Remove booting-without-of.rst	2020-10-13 13:33:16 -05:00
sound	ASoC: doc: Fix undefined SND_SOC_DAPM_NOPM argument	2024-02-23 08:42:10 +01:00
sparc
sphinx	docs: Fix the docs build with Sphinx 6.0	2023-01-18 11:44:53 +01:00
sphinx-static
spi
staging
target	tweewide: Fix most Shebang lines	2021-05-22 11:40:55 +02:00
timers
trace	attr: use consistent sgid stripping checks	2023-03-22 13:30:08 +01:00
translations	docs: futex: Fix kernel-doc references after code split-up preparation	2023-04-26 11:27:40 +02:00
usb
userspace-api	Remove DECnet support from kernel	2023-06-21 15:45:38 +02:00
virt	KVM: s390: disable migration mode when dirty tracking is disabled	2023-03-11 16:39:58 +01:00
vm	arm: remove CONFIG_ARCH_HAS_HOLES_MEMORYMODEL	2022-05-15 20:00:09 +02:00
w1	docs: w1: w1_therm: Fix broken xref, mistakes, clarify text	2020-10-08 09:47:15 +02:00
watchdog
x86	x86/bugs: Use ALTERNATIVE() instead of mds_user_clear static key	2024-04-13 12:58:57 +02:00
xtensa	xtensa: fix TLBTEMP area placement	2020-11-16 02:13:15 -08:00
.gitignore
asm-annotations.rst	x86/entry: Emit a symbol for register restoring thunk	2021-02-03 23:28:40 +01:00
atomic_bitops.txt	locking/atomic: Make test_and_*_bit() ordered on failure	2022-08-25 11:38:10 +02:00
atomic_t.txt
Changes
CodingStyle
conf.py	docs/conf.py: Cope with removal of language=None in Sphinx 5.0.0	2022-06-09 10:21:28 +02:00
COPYING-logo
docutils.conf
dontdiff	kbuild: generate Module.symvers only when vmlinux exists	2021-05-19 10:12:59 +02:00
index.rst
Kconfig	docs: Kconfig/Makefile: add a check for broken ABI files	2020-10-30 13:08:07 +01:00
logo.gif
Makefile	A small number of fixes, plus a build tweak to respect the desire for	2020-11-03 09:57:30 -08:00
memory-barriers.txt
SubmittingPatches
watch_queue.rst