Pawan Gupta 77018fb9ef 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 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>		2024-03-15 10:48:22 -04:00
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ABI	x86/rfds: Mitigate Register File Data Sampling (RFDS)	2024-03-15 10:48:22 -04:00
PCI	Merge branch 'pci/misc'	2023-08-29 11:03:57 -05:00
RCU	Docs/RCU/rculist_nulls: Fix text about atomic_set_release()	2023-07-14 14:55:57 -07:00
accel	…
accounting	docs: psi: use correct config name	2023-07-31 09:54:17 -06:00
admin-guide	x86/rfds: Mitigate Register File Data Sampling (RFDS)	2024-03-15 10:48:22 -04:00
arch	x86/bugs: Use ALTERNATIVE() instead of mds_user_clear static key	2024-03-06 14:48:44 +00:00
block	Documentation work keeps chugging along; stuff for 6.6 includes:	2023-08-30 20:05:42 -07:00
bpf	Including fixes from netfilter and bpf.	2023-09-07 18:33:07 -07:00
cdrom	…
core-api	workqueue: doc: Fix function and sysfs path errors	2023-10-12 07:27:22 -10:00
cpu-freq	…
crypto	…
dev-tools	LoongArch changes for v6.6	2023-09-08 12:16:52 -07:00
devicetree	dt-bindings: net: snps,dwmac: Tx coe unsupported	2024-01-31 16:18:58 -08:00
doc-guide	Documentation: doc-guide: use '%' constant indicator in Return: examples	2023-07-14 13:16:59 -06:00
driver-api	PCI/P2PDMA: Remove reference to pci_p2pdma_map_sg()	2024-01-25 15:35:47 -08:00
fault-injection	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
fb	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
features	LoongArch changes for v6.6	2023-09-08 12:16:52 -07:00
filesystems	rename(): fix the locking of subdirectories	2024-01-31 16:18:57 -08:00
firmware-guide	Documentation work keeps chugging along; stuff for 6.6 includes:	2023-08-30 20:05:42 -07:00
firmware_class	…
fpga	…
gpu	drm: Allow drivers to indicate the damage helpers to ignore damage clips	2024-01-31 16:19:08 -08:00
hid	HID: Add introduction about HID for non-kernel programmers	2023-08-07 13:24:36 +02:00
hwmon	Documentation work keeps chugging along; stuff for 6.6 includes:	2023-08-30 20:05:42 -07:00
i2c	i2c: i801: Add support for Intel Birch Stream SoC	2023-11-28 17:19:46 +00:00
iio	…
images	…
infiniband	…
input	input: docs: pxrc: remove reference to phoenix-sim	2023-08-28 12:43:32 -06:00
isdn	…
kbuild	Documentation: kbuild: explain handling optional dependencies	2023-09-25 16:01:05 +09:00
kernel-hacking	…
leds	- New Drivers	2023-07-03 11:26:05 -07:00
litmus-tests	…
livepatch	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
locking	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
maintainer	Documentation work keeps chugging along; stuff for 6.6 includes:	2023-08-30 20:05:42 -07:00
mhi	…
misc-devices	…
mm	Add x86 shadow stack support	2023-08-31 12:20:12 -07:00
netlabel	…
netlink	netlink: specs: devlink: fix reply command values	2023-10-13 17:27:27 -07:00
networking	devlink: Fix command annotation documentation	2024-02-23 09:24:50 +01:00
nvdimm	…
nvme	…
pcmcia	…
peci	…
power	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
powerpc	docs: kernel_feat.py: fix potential command injection	2024-01-31 16:18:46 -08:00
process	rust: upgrade to Rust 1.73.0	2024-02-16 19:10:43 +01:00
riscv	docs: kernel_feat.py: fix potential command injection	2024-01-31 16:18:46 -08:00
rust	docs: rust: update Rust docs output path	2023-10-19 16:39:03 +02:00
scheduler	Documentation work keeps chugging along; stuff for 6.6 includes:	2023-08-30 20:05:42 -07:00
scsi	SCSI misc on 20230902	2023-09-02 12:02:41 -07:00
security	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
sound	ASoC: doc: Fix undefined SND_SOC_DAPM_NOPM argument	2024-02-05 20:14:26 +00:00
sphinx	docs: kernel_feat.py: fix build error for missing files	2024-02-23 09:25:16 +01:00
sphinx-static	…
spi	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
staging	…
target	…
timers	…
tools	rtla: fix a example in rtla-timerlat-hist.rst	2023-09-22 14:44:04 +02:00
trace	Documentation: probes: Add a new ret_ip callback parameter	2023-10-17 10:21:45 +09:00
translations	docs: kernel_feat.py: fix potential command injection	2024-01-31 16:18:46 -08:00
usb	USB / Thunderbolt / PHY driver update for 6.6-rc1	2023-09-01 09:23:34 -07:00
userspace-api	Including fixes from netfilter and bpf.	2023-09-07 18:33:07 -07:00
virt	ARM:	2023-09-07 13:52:20 -07:00
w1	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
watchdog	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
wmi	Documentation work keeps chugging along; stuff for 6.6 includes:	2023-08-30 20:05:42 -07:00
.gitignore	…
Changes	…
CodingStyle	…
Kconfig	…
Makefile	docs: Integrate rustdoc generation into htmldocs	2023-07-21 15:08:46 -06:00
SubmittingPatches	…
atomic_bitops.txt	…
atomic_t.txt	…
conf.py	docs: Instruct LaTeX to cope with deeper nesting	2024-03-01 13:34:58 +01:00
docutils.conf	…
dontdiff	…
index.rst	…
memory-barriers.txt	…
subsystem-apis.rst	docs: consolidate networking interfaces	2023-07-21 14:54:50 -06:00