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Pawan Gupta 77018fb9ef x86/rfds: Mitigate Register File Data Sampling (RFDS) 
commit 8076fcde01 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>
History 2024-03-15 10:48:22 -04:00
..
accel accel/ivpu: Don't enable any tiles by default on VPU40xx 2024-03-01 13:35:01 +01:00
accessibility tty: use u8 for flags 2023-08-11 21:12:45 +02:00
acpi ACPI: APEI: set memory failure flags as MF_ACTION_REQUIRED on synchronous events 2024-02-05 20:14:15 +00:00
amba amba: bus: fix refcount leak 2023-08-22 15:50:57 +02:00
android binder: signal epoll threads of self-work 2024-02-23 09:25:04 +01:00
ata ahci: Extend ASM1061 43-bit DMA address quirk to other ASM106x parts 2024-03-01 13:35:11 +01:00
atm atm: idt77252: fix a memleak in open_card_ubr0 2024-02-16 19:10:49 +01:00
auxdisplay drm for 6.6-rc1 2023-08-30 13:34:34 -07:00
base x86/rfds: Mitigate Register File Data Sampling (RFDS) 2024-03-15 10:48:22 -04:00
bcma bcma: Add explicit of_device.h include 2023-04-14 15:32:56 +03:00
block ublk: move ublk_cancel_dev() out of ub->mutex 2024-03-06 14:48:34 +00:00
bluetooth Bluetooth: hci_bcm4377: do not mark valid bd_addr as invalid 2024-03-06 14:48:39 +00:00
bus bus: imx-weim: fix valid range check 2024-03-01 13:35:05 +01:00
cache cache: ax45mp_cache: Align end size to cache boundary in ax45mp_dma_cache_wback() 2024-03-01 13:35:08 +01:00
cdrom cdrom/gdrom: Fix build error 2023-06-29 08:09:31 -06:00
cdx cdx: Explicitly include correct DT includes 2023-08-04 16:21:20 +02:00
char hwrng: starfive - Fix dev_err_probe return error 2024-02-05 20:14:16 +00:00
clk clk: imx: clk-imx8qxp: fix LVDS bypass, pixel and phy clocks 2024-02-05 20:14:29 +00:00
clocksource clocksource/drivers/timer-ti-dm: Fix make W=n kerneldoc warnings 2024-01-25 15:35:42 -08:00
comedi Revert "comedi: add HAS_IOPORT dependencies" 2023-09-12 15:49:20 +02:00
connector connector/cn_proc: revert "connector: Fix proc_event_num_listeners count not cleared" 2024-02-23 09:25:01 +01:00
counter First set of Counter fixes for 6.6 2023-10-02 13:13:15 +02:00
cpufreq cpufreq: intel_pstate: fix pstate limits enforcement for adjust_perf call back 2024-03-06 14:48:34 +00:00
cpuidle cpuidle: haltpoll: Do not enable interrupts when entering idle 2024-01-25 15:35:15 -08:00
crypto crypto: virtio/akcipher - Fix stack overflow on memcpy 2024-03-01 13:35:01 +01:00
cxl cxl/pci: Fix disabling memory if DVSEC CXL Range does not match a CFMWS window 2024-03-01 13:34:59 +01:00
dax mm: remove enum page_entry_size 2023-08-24 16:20:30 -07:00
dca Mainly singleton patches all over the place. Series of note are: 2023-04-27 19:57:00 -07:00
devfreq PM / devfreq: Synchronize devfreq_monitor_[start/stop] 2024-02-05 20:14:15 +00:00
dio drivers: dio: fix possible memory leak in dio_init() 2022-11-09 15:12:37 +01:00
dma dmaengine: fsl-edma: correct max_segment_size setting 2024-03-15 10:48:13 -04:00
dma-buf dma-buf: fix check in dma_resv_add_fence 2023-12-08 08:52:19 +01:00
edac EDAC/thunderx: Fix possible out-of-bounds string access 2024-01-25 15:35:12 -08:00
eisa EISA: Replace all non-returning strlcpy with strscpy 2023-07-27 10:04:42 -07:00
extcon extcon: fix possible name leak in extcon_dev_register() 2024-02-05 20:14:31 +00:00
firewire firewire: core: send bus reset promptly on gap count error 2024-03-01 13:34:56 +01:00
firmware efi/capsule-loader: fix incorrect allocation size 2024-03-06 14:48:37 +00:00
fpga fpga: Fix memory leak for fpga_region_test_class_find() 2023-10-24 19:32:39 +02:00
fsi fsi: i2cr: Switch to use struct i2c_driver's .probe() 2023-08-22 15:51:33 +02:00
gnss driver core: class: remove module * from class_create() 2023-03-17 15:16:33 +01:00
gpio gpio: fix resource unwinding order in error path 2024-03-06 14:48:44 +00:00
gpu drm/nouveau: don't fini scheduler before entity flush 2024-03-06 14:48:45 +00:00
greybus greybus: Use alloc_ordered_workqueue() to create ordered workqueues 2023-05-08 13:52:27 -10:00
hid HID: nvidia-shield: Add missing null pointer checks to LED initialization 2024-03-01 13:34:51 +01:00
hsi hsi: omap_ssi: Explicitly include correct DT includes 2023-07-31 23:17:57 +02:00
hte hte: tegra: Fix missing error code in tegra_hte_test_probe() 2023-11-20 11:59:08 +01:00
hv hyperv-next for v6.6 2023-09-04 11:26:29 -07:00
hwmon hwmon: (nct6775) Fix access to temperature configuration registers 2024-03-01 13:35:08 +01:00
hwspinlock hwspinlock: qcom: add missing regmap config for SFPB MMIO implementation 2023-07-17 11:49:18 -07:00
hwtracing coresight: etm4x: Fix width of CCITMIN field 2024-01-20 11:51:49 +01:00
i2c i2c: imx: when being a target, mark the last read as processed 2024-03-01 13:35:10 +01:00
i3c i3c: master: cdns: Update maximum prescaler value for i2c clock 2024-02-05 20:14:31 +00:00
idle x86: Fix CPUIDLE_FLAG_IRQ_ENABLE leaking timer reprogram 2024-01-25 15:35:12 -08:00
iio iio: pressure: bmp280: Add missing bmp085 to SPI id table 2024-02-23 09:25:07 +01:00
infiniband RDMA/srpt: fix function pointer cast warnings 2024-03-01 13:35:05 +01:00
input Input: i8042 - add Fujitsu Lifebook U728 to i8042 quirk table 2024-03-01 13:34:53 +01:00
interconnect interconnect: qcom: sm8550: Enable sync_state 2024-02-23 09:24:57 +01:00
iommu iommufd: Fix iopt_access_list_id overwrite bug 2024-03-06 14:48:41 +00:00
ipack tty: make tty_operations::write()'s count size_t 2023-08-11 21:12:46 +02:00
irqchip irqchip/sifive-plic: Enable interrupt if needed before EOI 2024-03-01 13:35:01 +01:00
isdn isdn: mISDN: hfcsusb: Spelling fix in comment 2023-10-23 09:39:46 +01:00
leds leds: trigger: panic: Don't register panic notifier if creating the trigger failed 2024-02-05 20:14:30 +00:00
macintosh powerpc updates for 6.6 2023-08-31 12:43:10 -07:00
mailbox mailbox: arm_mhuv2: Fix a bug for mhuv2_sender_interrupt 2024-02-05 20:14:31 +00:00
mcb mcb: fix error handling for different scenarios when parsing 2023-11-28 17:20:05 +00:00
md dm-integrity, dm-verity: reduce stack usage for recheck 2024-03-01 13:35:01 +01:00
media media: rc: bpf attach/detach requires write permission 2024-02-23 09:25:07 +01:00
memory memory: tegra: Set BPMP msg flags to reset IPC channels 2023-11-20 11:59:17 +01:00
memstick memstick r592: make memstick_debug_get_tpc_name() static 2023-06-12 15:16:19 +02:00
message scsi: message: fusion: Add HAS_IOPORT dependencies 2023-05-31 19:59:26 -04:00
mfd mfd: ti_am335x_tscadc: Fix TI SoC dependencies 2024-02-05 20:14:31 +00:00
misc misc: open-dice: Fix spurious lockdep warning 2024-03-01 13:34:51 +01:00
mmc mmc: sdhci-xenon: fix PHY init clock stability 2024-03-06 14:48:41 +00:00
most staging: most: Replace all non-returning strlcpy with strscpy 2023-06-01 07:07:37 -07:00
mtd mtd: rawnand: marvell: fix layouts 2024-03-06 14:48:40 +00:00
mux mux: Explicitly include correct DT includes 2023-08-28 13:36:24 -05:00
net net: pds_core: Fix possible double free in error handling path 2024-03-15 10:48:21 -04:00
nfc nfc: virtual_ncidev: Add variable to check if ndev is running 2023-12-20 17:01:59 +01:00
ntb ntb: Check tx descriptors outstanding instead of head/tail for tx queue 2023-08-22 12:38:19 -04:00
nubus nubus: Don't list slot resources by default 2023-05-22 13:51:56 +02:00
nvdimm nd_btt: Make BTT lanes preemptible 2023-11-20 11:59:19 +01:00
nvme nvmet-fc: take ref count on tgtport before delete assoc 2024-03-01 13:34:52 +01:00
nvmem nvmem: brcm_nvram: store a copy of NVRAM content 2024-01-01 12:42:44 +00:00
of of: property: fw_devlink: Fix stupid bug in remote-endpoint parsing 2024-03-06 14:48:39 +00:00
opp OPP: Pass rounded rate to _set_opp() 2024-01-31 16:18:49 -08:00
parisc parisc/power: Fix power soft-off button emulation on qemu 2024-01-31 16:18:52 -08:00
parport parport: parport_serial: Add Brainboxes device IDs and geometry 2024-01-20 11:51:48 +01:00
pci PCI/MSI: Prevent MSI hardware interrupt number truncation 2024-03-01 13:35:01 +01:00
pcmcia pcmcia: ds: fix possible name leak in error path in pcmcia_device_add() 2023-11-20 11:59:31 +01:00
peci Update peci-next for v6.6-rc1 2023-08-08 10:53:30 +02:00
perf drivers: perf: ctr_get_width function for legacy is not defined 2024-03-06 14:48:38 +00:00
phy phy: freescale: phy-fsl-imx8-mipi-dphy: Fix alias name to use dashes 2024-03-06 14:48:43 +00:00
pinctrl pinctrl: baytrail: Fix types of config value in byt_pin_config_set() 2024-02-05 20:14:30 +00:00
platform platform/x86: thinkpad_acpi: Only update profile if successfully converted 2024-03-01 13:35:08 +01:00
pmdomain pmdomain: qcom: rpmhpd: Fix enabled_corner aggregation 2024-03-06 14:48:41 +00:00
pnp PNP: ACPI: fix fortify warning 2024-02-05 20:14:15 +00:00
power power: supply: bq27xxx-i2c: Do not free non existing IRQ 2024-03-06 14:48:37 +00:00
powercap powercap: DTPM: Fix missing cpufreq_cpu_put() calls 2023-12-13 18:45:25 +01:00
pps driver core: class: remove module * from class_create() 2023-03-17 15:16:33 +01:00
ps3 driver/ps3: Include <video/cmdline.h> for mode parsing 2023-02-20 14:56:51 +01:00
ptp ptp: annotate data-race around q->head and q->tail 2023-11-28 17:19:51 +00:00
pwm pwm: Fix out-of-bounds access in of_pwm_single_xlate() 2024-01-25 15:35:46 -08:00
rapidio Mainly singleton patches all over the place. Series of note are: 2023-04-27 19:57:00 -07:00
ras ras/debugfs: Fix error checking for debugfs_create_dir() 2023-05-16 21:12:23 +02:00
regulator regulator (max5970): Fix IRQ handler 2024-03-01 13:34:51 +01:00
remoteproc remoteproc updates for v6.6 2023-09-04 15:12:26 -07:00
reset reset: hisilicon: hi6220: fix Wvoid-pointer-to-enum-cast warning 2024-01-20 11:51:44 +01:00
rpmsg rpmsg: virtio: Free driver_override when rpmsg_remove() 2024-01-31 16:18:50 -08:00
rtc rtc: Extend timeout for waiting for UIP to clear to 1s 2024-01-31 16:18:56 -08:00
s390 s390/cio: fix invalid -EBUSY on ccw_device_start 2024-03-01 13:34:58 +01:00
sbus sbus: Explicitly include correct DT includes 2023-08-28 13:36:24 -05:00
scsi scsi: jazz_esp: Only build if SCSI core is builtin 2024-03-01 13:35:06 +01:00
sh sh: intc: move to use bus_get_dev_root() 2023-03-17 15:29:55 +01:00
siox siox: fix possible memory leak in siox_device_add() 2022-11-09 15:40:14 +01:00
slimbus driver core: make struct bus_type.uevent() take a const * 2023-01-27 13:45:52 +01:00
soc soc: qcom: pmic_glink: Fix boot when QRTR=m 2024-03-06 14:48:40 +00:00
soundwire soundwire: fix initializing sysfs for same devices on different buses 2024-01-31 16:18:47 -08:00
spi spi: cadence-qspi: fix pointer reference in runtime PM hooks 2024-03-06 14:48:34 +00:00
spmi spmi: mediatek: Fix UAF on device remove 2024-02-05 20:14:32 +00:00
ssb driver core: make struct bus_type.uevent() take a const * 2023-01-27 13:45:52 +01:00
staging staging: iio: ad5933: fix type mismatch regression 2024-02-23 09:25:06 +01:00
target scsi: target: pscsi: Fix bio_put() for error case 2024-03-01 13:34:59 +01:00
tc The main MIPS changes for 5.6: 2020-01-31 11:28:31 -08:00
tee tee: optee: Fix supplicant based device enumeration 2023-12-13 18:45:11 +01:00
thermal thermal: core: Fix thermal zone suspend-resume synchronization 2024-02-05 20:14:15 +00:00
thunderbolt thunderbolt: Fix setting the CNS bit in ROUTER_CS_5 2024-02-23 09:25:13 +01:00
tty serial: amba-pl011: Fix DMA transmission in RS485 mode 2024-03-01 13:35:02 +01:00
ufs scsi: ufs: core: Remove the ufshcd_release() in ufshcd_err_handling_prepare() 2024-03-01 13:34:55 +01:00
uio uio: Fix use-after-free in uio_open 2024-01-20 11:51:48 +01:00
usb usb: roles: don't get/set_role() when usb_role_switch is unregistered 2024-03-01 13:35:02 +01:00
vdpa vdpa: Fix an error handling path in eni_vdpa_probe() 2024-01-25 15:35:54 -08:00
vfio iommufd/iova_bitmap: Consider page offset for the pages to be pinned 2024-03-01 13:35:05 +01:00
vhost virtio/vsock: send credit update during setting SO_RCVLOWAT 2024-01-25 15:35:26 -08:00
video fbcon: always restore the old font data in fbcon_do_set_font() 2024-03-06 14:48:38 +00:00
virt virt: sevguest: Fix passing a stack buffer as a scatterlist target 2023-11-20 11:59:30 +01:00
virtio virtio_ring: fix syncs DMA memory with different direction 2024-01-05 15:19:41 +01:00
vlynq bus: Make remove callback return void 2021-07-21 11:53:42 +02:00
w1 w1: ds2482: Switch back to use struct i2c_driver's .probe() 2023-09-13 10:48:42 +02:00
watchdog watchdog: it87_wdt: Keep WDTCTRL bit 3 unmodified for IT8784/IT8786 2024-02-05 20:14:29 +00:00
xen xen/events: fix error code in xen_bind_pirq_msi_to_irq() 2024-03-01 13:35:04 +01:00
zorro zorro: Include zorro.h in names.c 2023-08-21 13:27:44 +02:00
Kconfig Merge patch series "Add non-coherent DMA support for AX45MP" 2023-09-08 11:24:34 -07:00
Makefile pmdomain: Rename the genpd subsystem to pmdomain 2023-09-13 11:09:21 +02:00