Messages in this thread | | | Date | Tue, 15 Mar 2022 10:26:46 -0700 | Subject | Re: [PATCH v2] PCI/AER: Handle Multi UnCorrectable/Correctable errors properly | From | Sathyanarayanan Kuppuswamy <> |
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On 3/15/22 10:14 AM, Eric Badger wrote: >> # Prep injection data for a correctable error. >> $ cd /sys/kernel/debug/apei/einj >> $ echo 0x00000040 > error_type >> $ echo 0x4 > flags >> $ echo 0x891000 > param4 >> >> # Root Error Status is initially clear >> $ setpci -s <Dev ID> ECAP0001+0x30.w >> 0000 >> >> # Inject one error >> $ echo 1 > error_inject >> >> # Interrupt received >> pcieport <Dev ID>: AER: Root Error Status 0001 >> >> # Inject another error (within 5 seconds) >> $ echo 1 > error_inject >> >> # No interrupt received, but "multiple ERR_COR" is now set >> $ setpci -s <Dev ID> ECAP0001+0x30.w >> 0003 >> >> # Wait for a while, then clear ERR_COR. A new interrupt immediately >> fires. >> $ setpci -s <Dev ID> ECAP0001+0x30.w=0x1 >> pcieport <Dev ID>: AER: Root Error Status 0002 >> >> Currently, the above issue has been only reproduced in the ICL server >> platform. >> >> [Eric: proposed reproducing steps] > Hmm, this differs from the procedure I described on v1, and I don't > think will work as described here.
I have attempted to modify the steps to reproduce it without returning IRQ_NONE for all cases (which will break the functionality). But I think I did not correct the last few steps.
How about replacing the last 3 steps with following?
# Inject another error (within 5 seconds) $ echo 1 > error_inject
# You will get a new IRQ with only multiple ERR_COR bit set pcieport <Dev ID>: AER: Root Error Status 0002
-- Sathyanarayanan Kuppuswamy Linux Kernel Developer
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