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Matthew Garrett 04178b1709 x86/efi: Clarify that reset attack mitigation needs appropriate userspace 
commit a5c03c31af upstream.

Some distributions have turned on the reset attack mitigation feature,
which is designed to force the platform to clear the contents of RAM if
the machine is shut down uncleanly. However, in order for the platform
to be able to determine whether the shutdown was clean or not, userspace
has to be configured to clear the MemoryOverwriteRequest flag on
shutdown - otherwise the firmware will end up clearing RAM on every
reboot, which is unnecessarily time consuming. Add some additional
clarity to the kconfig text to reduce the risk of systems being
configured this way.

Signed-off-by: Matthew Garrett <mjg59@google.com>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-efi@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2018-02-03 17:39:25 +01:00
..
accessibility License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
acpi ACPI / bus: Leave modalias empty for devices which are not present 2018-02-03 17:38:59 +01:00
amba License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
android android: binder: use VM_ALLOC to get vm area 2018-02-03 17:39:22 +01:00
ata libata: apply MAX_SEC_1024 to all LITEON EP1 series devices 2018-01-23 19:58:18 +01:00
atm atm: horizon: Fix irq release error 2017-12-14 09:53:13 +01:00
auxdisplay auxdisplay: img-ascii-lcd: Only build on archs that have IOMEM 2018-02-03 17:39:07 +01:00
base sysfs/cpu: Add vulnerability folder 2018-01-17 09:45:27 +01:00
bcma License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
block null_blk: fix dev->badblocks leak 2018-02-03 17:39:00 +01:00
bluetooth Bluetooth: hci_bcm: Fix setting of irq trigger type 2017-12-25 14:26:27 +01:00
bus sunxi-rsb: Include OF based modalias in device uevent 2018-01-10 09:31:19 +01:00
cdrom License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
char Revert "ipmi_si: fix memory leak on new_smi" 2017-12-29 17:53:49 +01:00
clk clk: sunxi: sun9i-mmc: Implement reset callback for reset controls 2017-12-29 17:53:48 +01:00
clocksource clocksource/drivers/arm_arch_timer: Validate CNTFRQ after enabling frame 2017-12-10 13:40:41 +01:00
connector
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cpufreq cpufreq: Add Loongson machine dependencies 2018-02-03 17:39:00 +01:00
cpuidle cpuidle: fix broadcast control when broadcast can not be entered 2017-12-25 14:26:30 +01:00
crypto crypto: inside-secure - avoid unmapping DMA memory that was not mapped 2018-02-03 17:38:50 +01:00
dax dev/dax: fix uninitialized variable build warning 2017-12-20 10:10:34 +01:00
dca
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devfreq License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dio License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dma dmaengine: ti-dma-crossbar: Correct am335x/am43xx mux value type 2017-12-20 10:10:24 +01:00
dma-buf dma-buf/sw_sync: force signal all unsignaled fences on dying timeline 2017-12-10 13:40:44 +01:00
edac EDAC, sb_edac: Fix missing break in switch 2017-12-10 13:40:41 +01:00
eisa License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
extcon License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
firewire License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
firmware x86/efi: Clarify that reset attack mitigation needs appropriate userspace 2018-02-03 17:39:25 +01:00
fmc License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
fpga License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
fsi drivers/fsi/scom: Remove reset before every putscom 2017-08-28 17:15:16 +02:00
gpio gpio: ath79: add missing MODULE_DESCRIPTION/LICENSE 2018-02-03 17:38:52 +01:00
gpu drm/vc4: Move IRQ enable to PM path 2018-02-03 17:39:17 +01:00
hid HID: wacom: Fix reporting of touch toggle (WACOM_HID_WD_MUTE_DEVICE) events 2018-02-03 17:38:51 +01:00
hsi License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
hv x86/virt: Add enum for hypervisors to replace x86_hyper 2017-12-25 14:26:20 +01:00
hwmon hwmon: (pmbus) Use 64bit math for DIRECT format values 2018-02-03 17:39:09 +01:00
hwspinlock License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
hwtracing License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
i2c i2c: i2c-boardinfo: fix memory leaks on devinfo 2018-02-03 17:39:07 +01:00
ide ide: ide-atapi: fix compile error with defining macro DEBUG 2017-12-17 15:08:00 +01:00
idle Revert "x86/mm: Stop calling leave_mm() in idle code" 2017-11-04 15:01:50 +01:00
iio iio: chemical: ccs811: Fix output of IIO_CONCENTRATION channels 2018-02-03 17:39:23 +01:00
infiniband {net,ib}/mlx5: Don't disable local loopback multicast traffic when needed 2018-01-31 14:03:46 +01:00
input Input: synaptics-rmi4 - do not delete interrupt memory too early 2018-02-03 17:39:24 +01:00
iommu iommu/arm-smmu-v3: Cope with duplicated Stream IDs 2018-01-10 09:31:21 +01:00
ipack
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irqchip irqchip/qcom: Fix u32 comparison with value less than zero 2017-12-14 09:53:05 +01:00
isdn License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
leds leds: pca955x: Don't invert requested value in pca955x_gpio_set_value() 2017-12-25 14:26:27 +01:00
lightnvm lightnvm: pblk: protect line bitmap while submitting meta io 2017-12-20 10:10:38 +01:00
macintosh License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mailbox mailbox: mailbox-test: don't rely on rx_buffer content to signal data ready 2017-12-14 09:53:12 +01:00
mcb License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
md bcache: check return value of register_shrinker 2018-02-03 17:39:01 +01:00
media media: usbtv: add a new usbid 2018-02-03 17:39:17 +01:00
memory License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
memstick License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
message License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mfd mfd: twl6040: Fix child-node lookup 2017-12-29 17:53:46 +01:00
misc mei: me: allow runtime pm for platform with D0i3 2018-02-03 17:39:22 +01:00
mmc mmc: sdhci-esdhc-imx: Fix i.MX53 eSDHCv3 clock 2018-01-23 19:58:13 +01:00
mtd mtd: nand: denali_pci: add missing MODULE_DESCRIPTION/AUTHOR/LICENSE 2018-02-03 17:38:52 +01:00
mux mux: core: fix double get_device() 2018-01-17 09:45:27 +01:00
net iwlwifi: fix access to prph when transport is stopped 2018-02-03 17:39:16 +01:00
nfc License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ntb
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nubus License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
nvdimm libnvdimm, pfn: fix start_pad handling for aligned namespaces 2017-12-29 17:53:49 +01:00
nvme nvme-pci: fix NULL pointer dereference in nvme_free_host_mem() 2018-02-03 17:39:10 +01:00
nvmem License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
of License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
oprofile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
parisc parisc: Hide Diva-built-in serial aux and graphics card 2017-12-29 17:53:47 +01:00
parport License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pci PCI / PM: Force devices to D0 in pci_pm_thaw_noirq() 2017-12-29 17:53:47 +01:00
pcmcia License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
perf License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
phy phy: work around 'phys' references to usb-nop-xceiv devices 2018-01-23 19:58:16 +01:00
pinctrl pinctrl: cherryview: Mask all interrupts on Intel_Strago based systems 2017-12-29 17:53:48 +01:00
platform platform/x86: wmi: Call acpi_wmi_init() later 2018-01-17 09:45:18 +01:00
pnp License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
power power: reset: zx-reboot: add missing MODULE_DESCRIPTION/AUTHOR/LICENSE 2018-02-03 17:38:51 +01:00
powercap
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pps drivers/pps: use surrounding "if PPS" to remove numerous dependency checks 2017-09-08 18:26:51 -07:00
ps3
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ptp License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pwm License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
rapidio drivers/rapidio/devices/rio_mport_cdev.c: fix resource leak in error handling path in 'rio_dma_transfer()' 2017-12-14 09:53:08 +01:00
ras License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
regulator License cleanup: add SPDX license identifiers to some files 2017-11-02 10:04:46 -07:00
remoteproc License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
reset License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
rpmsg rpmsg: glink: Initialize the "intent_req_comp" completion variable 2017-12-20 10:10:29 +01:00
rtc rtc: m41t80: remove unneeded checks from m41t80_sqw_set_rate 2018-01-05 15:48:59 +01:00
s390 s390/zcrypt: Fix wrong comparison leading to strange load balancing 2018-02-03 17:38:59 +01:00
sbus License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
scsi scsi: ufs: ufshcd: fix potential NULL pointer dereference in ufshcd_config_vreg 2018-02-03 17:39:15 +01:00
sfi
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sh License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sn
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soc soc: mediatek: pwrap: fix compiler errors 2017-12-20 10:10:34 +01:00
spi spi: imx: do not access registers while clocks disabled 2018-02-03 17:39:23 +01:00
spmi spmi: pmic-arb: Move the ownership check to irq_chip callback 2017-08-28 13:52:22 +02:00
ssb License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
staging staging: ccree: fix fips event irq handling build 2018-02-03 17:39:19 +01:00
target block: fix blk_rq_append_bio 2018-01-02 20:31:05 +01:00
tc
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tee optee: fix invalid of_node_put() in optee_driver_init() 2017-12-25 14:26:24 +01:00
thermal thermal/drivers/hisi: Fix multiple alarm interrupts firing 2017-12-25 14:26:31 +01:00
thunderbolt thunderbolt: tb: fix use after free in tb_activate_pcie_devices 2017-12-20 10:10:24 +01:00
tty serial: imx: Only wakeup via RTSDEN bit if the system has RTS/CTS 2018-02-03 17:39:23 +01:00
uio License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
usb usb/gadget: Fix "high bandwidth" check in usb_gadget_ep_match_desc() 2018-02-03 17:39:21 +01:00
uwb License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
vfio vfio/pci: Virtualize Maximum Payload Size 2017-12-25 14:26:29 +01:00
vhost vhost: fix skb leak in handle_rx() 2017-12-17 15:07:56 +01:00
video backlight: pwm_bl: Fix overflow condition 2017-12-25 14:26:24 +01:00
virt virt: Convert to using %pOF instead of full_name 2017-08-29 08:52:51 -05:00
virtio virtio: release virtio index when fail to device_register 2017-12-14 09:52:48 +01:00
vlynq
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vme License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
w1 License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
watchdog License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
xen License cleanup: add SPDX license identifiers to some files 2017-11-02 10:04:46 -07:00
zorro License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Kconfig License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00