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| author | Vasant Hegde <vasant.hegde@amd.com> | 2025-02-27 19:23:14 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2025-03-10 11:27:08 +0300 |
| commit | 558d2bbd457d513d9226f88fef0d9c782e595f6e (patch) | |
| tree | ada20a414e0d407dd6c0e6e76ca1f19164e9d8ad | |
| parent | 0ad2507d5d93f39619fc42372c347d6006b64319 (diff) | |
| download | linux-558d2bbd457d513d9226f88fef0d9c782e595f6e.tar.xz | |
iommu/amd: Log IOMMU control register in event log path
Useful for debugging ILLEGAL_DEV_TABLE_ENTRY events as some of the
DTE settings depends on Control register settings.
Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20250227162320.5805-2-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
| -rw-r--r-- | drivers/iommu/amd/iommu.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c index b48a72bd7b23..797c8612966a 100644 --- a/drivers/iommu/amd/iommu.c +++ b/drivers/iommu/amd/iommu.c @@ -868,7 +868,7 @@ static void iommu_print_event(struct amd_iommu *iommu, void *__evt) int type, devid, flags, tag; volatile u32 *event = __evt; int count = 0; - u64 address; + u64 address, ctrl; u32 pasid; retry: @@ -878,6 +878,7 @@ retry: (event[1] & EVENT_DOMID_MASK_LO); flags = (event[1] >> EVENT_FLAGS_SHIFT) & EVENT_FLAGS_MASK; address = (u64)(((u64)event[3]) << 32) | event[2]; + ctrl = readq(iommu->mmio_base + MMIO_CONTROL_OFFSET); if (type == 0) { /* Did we hit the erratum? */ @@ -899,6 +900,7 @@ retry: dev_err(dev, "Event logged [ILLEGAL_DEV_TABLE_ENTRY device=%04x:%02x:%02x.%x pasid=0x%05x address=0x%llx flags=0x%04x]\n", iommu->pci_seg->id, PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid), pasid, address, flags); + dev_err(dev, "Control Reg : 0x%llx\n", ctrl); dump_dte_entry(iommu, devid); break; case EVENT_TYPE_DEV_TAB_ERR: |