On Tue, Mar 15, 2022 at 05:08:42AM +0000, Kuppuswamy Sathyanarayanan wrote:
> This error can be reproduced by making following changes to the
> aer_irq() function and by executing the given test commands.
>
> static irqreturn_t aer_irq(int irq, void *context)
> struct aer_err_source e_src = {};
>
> pci_read_config_dword(rp, aer + PCI_ERR_ROOT_STATUS,
> &e_src.status);
> + pci_dbg(pdev->port, "Root Error Status: %04x\n",
> + e_src.status);
> if (!(e_src.status & AER_ERR_STATUS_MASK))
> return IRQ_NONE;
>
> + mdelay(5000);
>
> # 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.
Eric
