From a9ed3aa9b87ee41e8ab3ff471b1331c154767e45 Mon Sep 17 00:00:00 2001 From: Dave Airlie Date: Sat, 26 Sep 2026 07:57:59 +1000 Subject: Merge tag 'drm-misc-fixes-2026-09-24' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-fixes A number of fixes: - bridge: - samsung-dsim: fix GPIO lifetime - client: Null pointer dereference fix - imagination: error handling fix, page handling fix - nouveau: fix reference leaks, double-frees, out-of-bounds accesses, use-after-frees, don't reject config without SCDC, a number of workarounds - virtio: fix memory leak, reference leaks, null pointer dereference, add pixel blend mode, cache coherency fix Signed-off-by: Dave Airlie From: Maxime Ripard Link: https://patch.msgid.link/arU22zzqUGDEco1y@houat --- drivers/ras/Kconfig | 71 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 71 insertions(+) create mode 100644 drivers/ras/Kconfig (limited to 'drivers/ras/Kconfig') diff --git a/drivers/ras/Kconfig b/drivers/ras/Kconfig new file mode 100644 index 000000000..070e17639 --- /dev/null +++ b/drivers/ras/Kconfig @@ -0,0 +1,71 @@ +# SPDX-License-Identifier: GPL-2.0-only +menuconfig RAS + bool "Reliability, Availability and Serviceability (RAS) features" + help + Reliability, availability and serviceability (RAS) is a computer + hardware engineering term. Computers designed with higher levels + of RAS have a multitude of features that protect data integrity + and help them stay available for long periods of time without + failure. + + Reliability can be defined as the probability that the system will + produce correct outputs up to some given time. Reliability is + enhanced by features that help to avoid, detect and repair hardware + faults. + + Availability is the probability a system is operational at a given + time, i.e. the amount of time a device is actually operating as the + percentage of total time it should be operating. + + Serviceability or maintainability is the simplicity and speed with + which a system can be repaired or maintained; if the time to repair + a failed system increases, then availability will decrease. + + Note that Reliability and Availability are distinct concepts: + Reliability is a measure of the ability of a system to function + correctly, including avoiding data corruption, whereas Availability + measures how often it is available for use, even though it may not + be functioning correctly. For example, a server may run forever and + so have ideal availability, but may be unreliable, with frequent + data corruption. + +if RAS + +config RAS_CEC + bool "Correctable Errors Collector" + depends on X86_MCE && MEMORY_FAILURE && DEBUG_FS + help + This is a small cache which collects correctable memory errors per 4K + page PFN and counts their repeated occurrence. Once the counter for a + PFN overflows, we try to soft-offline that page as we take it to mean + that it has reached a relatively high error count and would probably + be best if we don't use it anymore. + + Bear in mind that this is absolutely useless if your platform doesn't + have ECC DIMMs and doesn't have DRAM ECC checking enabled in the BIOS. + +config RAS_CEC_DEBUG + bool "CEC debugging machinery" + default n + depends on RAS_CEC + help + Add extra files to (debugfs)/ras/cec to test the correctable error + collector feature. "pfn" is a writable file that allows user to + simulate an error in a particular page frame. "array" is a read-only + file that dumps out the current state of all pages logged so far. + +source "drivers/ras/amd/atl/Kconfig" + +config RAS_FMPM + tristate "FRU Memory Poison Manager" + default m + depends on AMD_ATL && ACPI_APEI + help + Support saving and restoring memory error information across reboot + using ACPI ERST as persistent storage. Error information is saved with + the UEFI CPER "FRU Memory Poison" section format. + + Memory will be retired during boot time and run time depending on + platform-specific policies. + +endif -- cgit v1.3.1