Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 33 insertions, 0 deletions

diff --git a/Documentation/arch/x86/x86_64/machinecheck.rst b/Documentation/arch/x86/x86_64/machinecheck.rst
new file mode 100644
index 0000000000..cea12ee972
--- /dev/null
+++ b/Documentation/arch/x86/x86_64/machinecheck.rst
@@ -0,0 +1,33 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+===============================================================
+Configurable sysfs parameters for the x86-64 machine check code
+===============================================================
+
+Machine checks report internal hardware error conditions detected
+by the CPU. Uncorrected errors typically cause a machine check
+(often with panic), corrected ones cause a machine check log entry.
+
+Machine checks are organized in banks (normally associated with
+a hardware subsystem) and subevents in a bank. The exact meaning
+of the banks and subevent is CPU specific.
+
+mcelog knows how to decode them.
+
+When you see the "Machine check errors logged" message in the system
+log then mcelog should run to collect and decode machine check entries
+from /dev/mcelog. Normally mcelog should be run regularly from a cronjob.
+
+Each CPU has a directory in /sys/devices/system/machinecheck/machinecheckN
+(N = CPU number).
+
+The directory contains some configurable entries. See
+Documentation/ABI/testing/sysfs-mce for more details.
+
+TBD document entries for AMD threshold interrupt configuration
+
+For more details about the x86 machine check architecture
+see the Intel and AMD architecture manuals from their developer websites.
+
+For more details about the architecture
+see http://one.firstfloor.org/~andi/mce.pdf