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powerpc/eeh: Add eeh_force_recover to debugfs

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This patch adds a debugfs interface to force scheduling a recovery event.
This can be used to recover a specific PE or schedule a "special" recovery
even that checks for errors at the PHB level.
To force a recovery of a normal PE, use:

 echo '<#pe>:<#phb>' > /sys/kernel/debug/powerpc/eeh_force_recover

To force a scan for broken PHBs:

 echo 'hwcheck' > /sys/kernel/debug/powerpc/eeh_force_recover

Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Oliver O'Halloran
2019-02-15 11:48:17 +11:00
committed by Michael Ellerman
parent 6b493f6079
commit 954bd99435
3 changed files with 75 additions and 10 deletions
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25
arch/powerpc/kernel/eeh_event.c
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@@ -121,20 +121,11 @@ int eeh_event_init(void)
* the actual event will be delivered in a normal context
* (from a workqueue).
*/
int eeh_send_failure_event(struct eeh_pe *pe)
int __eeh_send_failure_event(struct eeh_pe *pe)
{
unsigned long flags;
struct eeh_event *event;
/*
* If we've manually supressed recovery events via debugfs
* then just drop it on the floor.
*/
if (eeh_debugfs_no_recover) {
pr_err("EEH: Event dropped due to no_recover setting\n");
return 0;
}
event = kzalloc(sizeof(*event), GFP_ATOMIC);
if (!event) {
pr_err("EEH: out of memory, event not handled\n");
@@ -153,6 +144,20 @@ int eeh_send_failure_event(struct eeh_pe *pe)
return 0;
}
int eeh_send_failure_event(struct eeh_pe *pe)
{
/*
* If we've manually supressed recovery events via debugfs
* then just drop it on the floor.
*/
if (eeh_debugfs_no_recover) {
pr_err("EEH: Event dropped due to no_recover setting\n");
return 0;
}
return __eeh_send_failure_event(pe);
}
/**
* eeh_remove_event - Remove EEH event from the queue
* @pe: Event binding to the PE