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author | Tony Luck <tony.luck@intel.com> | 2023-11-15 22:54:50 +0300 |
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committer | Borislav Petkov (AMD) <bp@alien8.de> | 2023-12-15 16:53:42 +0300 |
commit | 1f68ce2a027250aeeb1756391110cdc4dc97c797 (patch) | |
tree | 534140189405bf3a60fad66ddaf27829f985979b /arch/powerpc/mm/book3s64/pkeys.c | |
parent | 7eae17c4add5de46efcca45356388f480103e6d9 (diff) | |
download | linux-1f68ce2a027250aeeb1756391110cdc4dc97c797.tar.xz |
x86/mce: Handle Intel threshold interrupt storms
Add an Intel specific hook into machine_check_poll() to keep track of
per-CPU, per-bank corrected error logs (with a stub for the
CONFIG_MCE_INTEL=n case).
When a storm is observed the rate of interrupts is reduced by setting
a large threshold value for this bank in IA32_MCi_CTL2. This bank is
added to the bitmap of banks for this CPU to poll. The polling rate is
increased to once per second.
When a storm ends reset the threshold in IA32_MCi_CTL2 back to 1, remove
the bank from the bitmap for polling, and change the polling rate back
to the default.
If a CPU with banks in storm mode is taken offline, the new CPU that
inherits ownership of those banks takes over management of storm(s) in
the inherited bank(s).
The cmci_discover() function was already very large. These changes
pushed it well over the top. Refactor with three helper functions to
bring it back under control.
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20231115195450.12963-4-tony.luck@intel.com
Diffstat (limited to 'arch/powerpc/mm/book3s64/pkeys.c')
0 files changed, 0 insertions, 0 deletions