linux/Documentation
Steven Rostedt f7e1d19105 Documentation/tracing: Mention that RESET_ATTACK_MITIGATION can clear memory
At the 2024 Linux Plumbers Conference, I was talking with Hans de Goede
about the persistent buffer to display traces from previous boots. He
mentioned that UEFI can clear memory. In my own tests I have not seen
this. He later informed me that it requires the config option:

 CONFIG_RESET_ATTACK_MITIGATION

It appears that setting this will allow the memory to be cleared on boot
up, which will definitely clear out the trace of the previous boot.

Add this information under the trace_instance in kernel-parameters.txt
to let people know that this can cause issues.

Link: https://lore.kernel.org/all/20170825155019.6740-2-ard.biesheuvel@linaro.org/

Reported-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20241007131653.35837081@gandalf.local.home
2024-10-14 09:50:30 -06:00
..
ABI Char/Misc and other driver changes for 6.12-rc1 2024-09-26 10:13:08 -07:00
accel drm next for 6.12-rc1 2024-09-19 10:18:15 +02:00
accounting
admin-guide Documentation/tracing: Mention that RESET_ATTACK_MITIGATION can clear memory 2024-10-14 09:50:30 -06:00
arch arm64 fixes for 6.12-rc2: 2024-10-04 12:20:09 -07:00
block docs: block: Fix grammar and spelling mistakes in bfq-iosched.rst 2024-09-05 14:38:10 -06:00
bpf docs/bpf: Add missing BPF program types to docs 2024-09-12 10:56:41 -07:00
cdrom
core-api Documentation: core-api/cpuhotplug: Fix missing prefix 2024-10-07 11:50:54 -06:00
cpu-freq
crypto
dev-tools Documentation: kgdb: Correct parameter error 2024-10-07 11:50:54 -06:00
devicetree sound fixes for 6.12-rc2 2024-10-04 11:29:46 -07:00
doc-guide
driver-api platform/x86: wmi: Update WMI driver API documentation 2024-10-06 12:48:52 +02:00
fault-injection Fix typo "allocateed" to allocated 2024-08-26 15:37:25 -06:00
fb
features x86: remove PG_uncached 2024-09-03 21:15:46 -07:00
filesystems USB/Thunderbolt update for 6.12-rc1 2024-09-26 09:45:36 -07:00
firmware_class
firmware-guide
fpga
gpu Short summary of fixes pull: 2024-10-01 08:15:55 +10:00
hid Documentation: hid: intel-ish-hid: Add vendor custom firmware loading 2024-08-19 21:12:27 +02:00
hwmon hwmon: Remove devm_hwmon_device_unregister() API function 2024-09-13 07:27:36 -07:00
i2c i2c: testunit: add SMBusAlert trigger 2024-08-26 15:15:48 +02:00
iio doc: iio: ad4695: update for calibration support 2024-09-03 18:49:43 +01:00
images
infiniband
input
isdn
kbuild kbuild: doc: replace "gcc" in external module description 2024-09-24 03:07:21 +09:00
kernel-hacking
leds - Limited LED current based on thermal conditions in the QCOM flash LED driver. 2024-09-23 14:20:11 -07:00
litmus-tests
livepatch Documentation: livepatch: Correct release locks antonym 2024-09-04 13:42:27 +02:00
locking
maintainer
mhi
misc-devices
mm ALong with the usual shower of singleton patches, notable patch series in 2024-09-21 07:29:05 -07:00
netlabel
netlink Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2024-09-12 17:11:24 -07:00
networking doc: net: napi: Update documentation for napi_schedule_irqoff 2024-10-03 12:07:29 +02:00
nvdimm
nvme Remove duplicate "and" in 'Linux NVMe docs. 2024-09-10 15:44:20 -06:00
PCI Documentation: PCI: fix typo in pci.rst 2024-09-10 15:30:42 -06:00
pcmcia
peci
power Documentation: PM: Discourage use of deprecated macros 2024-09-04 14:37:57 +02:00
process kernel-docs: Add new section for Rust learning materials 2024-10-14 09:50:29 -06:00
RCU Merge branches 'context_tracking.15.08.24a', 'csd.lock.15.08.24a', 'nocb.09.09.24a', 'rcutorture.14.08.24a', 'rcustall.09.09.24a', 'srcu.12.08.24a', 'rcu.tasks.14.08.24a', 'rcu_scaling_tests.15.08.24a', 'fixes.12.08.24a' and 'misc.11.08.24a' into next.09.09.24a 2024-09-09 00:09:47 +05:30
rust kernel-docs: Add new section for Rust learning materials 2024-10-14 09:50:29 -06:00
scheduler sched_ext: Provide a sysfs enable_seq counter 2024-09-23 06:53:02 -10:00
scsi
security documentation: add IPE documentation 2024-08-20 14:03:47 -04:00
sound Docs/sound: Add documentation for userspace-driven ALSA timers 2024-08-18 09:55:54 +02:00
sphinx docs: kerneldoc-preamble.sty: Suppress extra spaces in CJK literal blocks 2024-09-05 14:16:41 -06:00
sphinx-static
spi
staging xz: remove XZ_EXTERN and extern from functions 2024-09-01 20:43:27 -07:00
target
tee
timers treewide: Fix wrong singular form of jiffies in comments 2024-09-08 20:47:40 +02:00
tools
trace docs: fix WARNING document not included in any toctree 2024-10-07 11:50:54 -06:00
translations docs/sp_SP: Add translation for scheduler/sched-bwc.rst 2024-10-14 09:50:30 -06:00
usb usb: gadget: f_uac1: Change volume name and remove alt names 2024-08-13 18:11:35 +02:00
userspace-api Landlock updates for v6.12-rc1 2024-09-24 10:40:11 -07:00
virt x86: 2024-09-28 09:20:14 -07:00
w1
watchdog [tree-wide] finally take no_llseek out 2024-09-27 08:18:43 -07:00
wmi platform/x86: dell-ddv: Fix typo in documentation 2024-10-06 12:47:40 +02:00
.gitignore
atomic_bitops.txt
atomic_t.txt
Changes
CodingStyle
conf.py
docutils.conf
dontdiff Kbuild updates for v6.12 2024-09-24 13:02:06 -07:00
index.rst
Kconfig
Makefile
memory-barriers.txt docs/memory-barriers.txt: Remove left-over references to "CACHE COHERENCY" 2024-09-13 23:56:44 -07:00
SubmittingPatches
subsystem-apis.rst