Messages in this thread | | | From | Smita Koralahalli <> | Subject | [PATCH v2 0/5] x86/mce: Handle error injection failures in mce-inject module | Date | Tue, 19 Oct 2021 18:36:36 -0500 |
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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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