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Subject[PATCH v2 0/5] x86/mce: Handle error injection failures in mce-inject module
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This series of patches handles the scenarios where error injection
fails silently on mce-inject module. It also cleans up the code by
replacing MCx_{STATUS, ADDR, MISC} macros with mca_msr_reg() and finally
returns error code to userspace on failures injecting the module.

Error injection fails if the bank is unpopulated (MCA_IPID register reads
zero) or if the platform enforces write ignored behavior on status
registers.

The first patch checks for an unpopulated bank by reading the value out
from MCA_IPID register and the fourth patch checks for writes ignored from
MCA_STATUS and MCA_DESTAT.

The second patch warns the user about MCA handlers missing signatures if
valid bit is not set in MCA_STATUS register before doing error injection.

The third patch does some cleanup by replacing MCx_{STATUS, ADDR, MISC}
macros with mca_msr_reg().

The final patch returns error code to userspace from mce-inject module.

Smita Koralahalli (5):
x86/mce/inject: Check if a bank is unpopulated before error injection
x86/mce/inject: Warn the user on a not set valid bit in MCA_STATUS
x86/mce: Use mca_msr_reg() in prepare_msrs()
x86/mce/inject: Check for writes ignored in status registers
x86/mce/mce-inject: Return error code to userspace from mce-inject
module

arch/x86/kernel/cpu/mce/core.c | 1 +
arch/x86/kernel/cpu/mce/inject.c | 103 ++++++++++++++++++++++++-------
2 files changed, 82 insertions(+), 22 deletions(-)

--
2.17.1

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