[v5,0/3] x86/mce: Handle error injection failure in mce-inject module

Message

Smita Koralahalli May 3, 2022, 3:28 a.m. UTC

This set of patches handles a scenario of silent hw error injection
failure on mce-inject module and returns appropriate error code to
userspace.

Error injection fails if the platform enforces write ignored behavior on
status registers and the second patch checks for writes ignored from
MCA_STATUS register and returns appropriate error code to user.

The first patch does some cleanup by replacing existing struct i_mce
with inject_desc and including error field as its member.

The last patch assigns and returns the error code to userspace when none
of the CPUs are online.

Smita Koralahalli (3):
  x86/mce/mce-inject: Replace struct i_mce with struct inject_desc
  x86/mce: Check for writes ignored in MCA_STATUS register
  x86/mce/mce-inject: Return appropriate error code if CPUs are offline

 arch/x86/kernel/cpu/mce/inject.c   | 124 +++++++++++++++++++----------
 arch/x86/kernel/cpu/mce/internal.h |   2 +-
 2 files changed, 82 insertions(+), 44 deletions(-)