diff options
Diffstat (limited to 'drivers/cxl/pci.c')
| -rw-r--r-- | drivers/cxl/pci.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/cxl/pci.c b/drivers/cxl/pci.c index 2ff361e756..659f9d46b1 100644 --- a/drivers/cxl/pci.c +++ b/drivers/cxl/pci.c @@ -957,11 +957,33 @@ static void cxl_error_resume(struct pci_dev *pdev) dev->driver ? "successful" : "failed"); } +static void cxl_reset_done(struct pci_dev *pdev) +{ + struct cxl_dev_state *cxlds = pci_get_drvdata(pdev); + struct cxl_memdev *cxlmd = cxlds->cxlmd; + struct device *dev = &pdev->dev; + + /* + * FLR does not expect to touch the HDM decoders and related + * registers. SBR, however, will wipe all device configurations. + * Issue a warning if there was an active decoder before the reset + * that no longer exists. + */ + guard(device)(&cxlmd->dev); + if (cxlmd->endpoint && + cxl_endpoint_decoder_reset_detected(cxlmd->endpoint)) { + dev_crit(dev, "SBR happened without memory regions removal.\n"); + dev_crit(dev, "System may be unstable if regions hosted system memory.\n"); + add_taint(TAINT_USER, LOCKDEP_STILL_OK); + } +} + static const struct pci_error_handlers cxl_error_handlers = { .error_detected = cxl_error_detected, .slot_reset = cxl_slot_reset, .resume = cxl_error_resume, .cor_error_detected = cxl_cor_error_detected, + .reset_done = cxl_reset_done, }; static struct pci_driver cxl_pci_driver = { |