powerpc/eeh: Allow to disable EEH
The patch introduces bootarg "eeh=off" to disable EEH functinality. Also, it creates /sys/kerenl/debug/powerpc/eeh_enable to disable or enable EEH functionality. By default, we have the functionality enabled. For PowerNV platform, we will restore to have the conventional mechanism of clearing frozen PE during PCI config access if we're going to disable EEH functionality. Conversely, we will rely on EEH for error recovery. The patch also fixes the issue that we missed to cover the case of disabled EEH functionality in function ioda_eeh_event(). Those events driven by interrupt should be cleared to avoid endless reporting. Signed-off-by:Gavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org>
parent
8a5ad356
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