[PATCH v2 02/26] iommu/amd: Introduce vIOMMU-specific events and event
From: Suravee Suthikulpanit
Date: Thu May 28 2026 - 01:18:29 EST
Adding support for new vIOMMU events:
* Guest Event Fault event
* vIOMMU Hardware Error event
Also, adding support for the additional vIOMMU related flags
in existing events.
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@xxxxxxx>
---
drivers/iommu/amd/amd_iommu_types.h | 7 ++++
drivers/iommu/amd/iommu.c | 58 ++++++++++++++++++++++-------
2 files changed, 52 insertions(+), 13 deletions(-)
diff --git a/drivers/iommu/amd/amd_iommu_types.h b/drivers/iommu/amd/amd_iommu_types.h
index c685d3771436..31af02d12afd 100644
---
drivers/iommu/amd/amd_iommu_types.h | 7 ++++
drivers/iommu/amd/iommu.c | 58 ++++++++++++++++++++++-------
2 files changed, 52 insertions(+), 13 deletions(-)
diff --git a/drivers/iommu/amd/amd_iommu_types.h b/drivers/iommu/amd/amd_iommu_types.h
index d2c64e2e9f05..4df6a50128de 100644
--- a/drivers/iommu/amd/amd_iommu_types.h
+++ b/drivers/iommu/amd/amd_iommu_types.h
@@ -149,6 +149,9 @@
#define EVENT_TYPE_IOTLB_INV_TO 0x7
#define EVENT_TYPE_INV_DEV_REQ 0x8
#define EVENT_TYPE_INV_PPR_REQ 0x9
+#define EVENT_TYPE_GUEST_EVENT_FAULT 0xb
+#define EVENT_TYPE_VIOMMU_HW_ERR 0xc
+
#define EVENT_TYPE_RMP_FAULT 0xd
#define EVENT_TYPE_RMP_HW_ERR 0xe
#define EVENT_DEVID_MASK 0xffff
@@ -261,6 +264,10 @@
#define EVTLOG_SIZE_MAX SZ_512K /* 32K entries */
#define EVTLOG_LEN_MASK_MAX (0xFULL << EVTLOG_SIZE_SHIFT)
+/* Constants for IO_PAGE_FAULT event */
+#define IO_PAGE_FAULT_VFLAGS_SHIFT 27
+#define IO_PAGE_FAULT_VFLAGS_MASK GENMASK_ULL(27, 23)
+
/* Constants for PPR Log handling */
#define PPRLOG_ENTRY_SIZE 0x10
#define PPRLOG_SIZE_SHIFT 56
diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index 4b4dd20ebec6..50f26c8123f3 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -854,7 +854,7 @@ static void amd_iommu_report_rmp_fault(struct amd_iommu *iommu, volatile u32 *ev
static void amd_iommu_report_page_fault(struct amd_iommu *iommu,
u16 devid, u16 domain_id,
- u64 address, int flags)
+ u64 address, int flags, u8 vflags)
{
struct iommu_dev_data *dev_data = NULL;
struct pci_dev *pdev;
@@ -889,13 +889,13 @@ static void amd_iommu_report_page_fault(struct amd_iommu *iommu,
}
if (__ratelimit(&dev_data->rs)) {
- pci_err(pdev, "Event logged [IO_PAGE_FAULT domain=0x%04x address=0x%llx flags=0x%04x]\n",
- domain_id, address, flags);
+ pci_err(pdev, "Event logged [IO_PAGE_FAULT domain=0x%04x address=0x%llx flags=0x%04x vflags=%#x]\n",
+ domain_id, address, flags, vflags);
}
} else {
- pr_err_ratelimited("Event logged [IO_PAGE_FAULT device=%04x:%02x:%02x.%x domain=0x%04x address=0x%llx flags=0x%04x]\n",
+ pr_err_ratelimited("Event logged [IO_PAGE_FAULT device=%04x:%02x:%02x.%x domain=0x%04x address=0x%llx flags=0x%04x vflags=%#x]\n",
iommu->pci_seg->id, PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid),
- domain_id, address, flags);
+ domain_id, address, flags, vflags);
}
out:
@@ -932,29 +932,42 @@ static void iommu_print_event(struct amd_iommu *iommu, void *__evt)
}
if (type == EVENT_TYPE_IO_FAULT) {
- amd_iommu_report_page_fault(iommu, devid, pasid, address, flags);
+ u8 vflags = FIELD_GET(IO_PAGE_FAULT_VFLAGS_MASK, event[0]);
+
+ amd_iommu_report_page_fault(iommu, devid, pasid, address, flags, vflags);
return;
}
switch (type) {
case EVENT_TYPE_ILL_DEV:
- dev_err(dev, "Event logged [ILLEGAL_DEV_TABLE_ENTRY device=%04x:%02x:%02x.%x pasid=0x%05x address=0x%llx flags=0x%04x]\n",
+ {
+ u8 vflags = FIELD_GET(IO_PAGE_FAULT_VFLAGS_MASK, event[0]);
+
+ dev_err(dev, "Event logged [ILLEGAL_DEV_TABLE_ENTRY deice=%04x:%02x:%02x.%x pasid=0x%05x address=0x%llx flags=0x%04x vflags=%#x]\n",
iommu->pci_seg->id, PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid),
- pasid, address, flags);
+ pasid, address, flags, vflags);
dev_err(dev, "Control Reg : 0x%llx\n", ctrl);
dump_dte_entry(iommu, devid);
break;
+ }
case EVENT_TYPE_DEV_TAB_ERR:
- dev_err(dev, "Event logged [DEV_TAB_HARDWARE_ERROR device=%04x:%02x:%02x.%x "
- "address=0x%llx flags=0x%04x]\n",
+ {
+ u8 vflags = FIELD_GET(IO_PAGE_FAULT_VFLAGS_MASK, event[0]);
+
+ dev_err(dev, "Event logged [DEV_TAB_HARDWARE_ERROR device=%04x:%02x:%02x.%x address=%#llx flags=%#04x vlfags=%#x]\n",
iommu->pci_seg->id, PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid),
- address, flags);
+ address, flags, vflags);
break;
+ }
case EVENT_TYPE_PAGE_TAB_ERR:
- dev_err(dev, "Event logged [PAGE_TAB_HARDWARE_ERROR device=%04x:%02x:%02x.%x pasid=0x%04x address=0x%llx flags=0x%04x]\n",
+ {
+ u8 vflags = FIELD_GET(IO_PAGE_FAULT_VFLAGS_MASK, event[0]);
+
+ dev_err(dev, "Event logged [PAGE_TAB_HARDWARE_ERROR device=%04x:%02x:%02x.%x pasid=0x%04x address=0x%llx flags=0x%04x vflags=%#x]\n",
iommu->pci_seg->id, PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid),
- pasid, address, flags);
+ pasid, address, flags, vflags);
break;
+ }
case EVENT_TYPE_ILL_CMD:
dev_err(dev, "Event logged [ILLEGAL_COMMAND_ERROR address=0x%llx]\n", address);
dump_command(address);
@@ -986,6 +999,25 @@ static void iommu_print_event(struct amd_iommu *iommu, void *__evt)
iommu->pci_seg->id, PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid),
pasid, address, flags, tag);
break;
+ case EVENT_TYPE_GUEST_EVENT_FAULT:
+ {
+ u8 gid = event[1] & 0xFFFF;
+ u8 vflags = FIELD_GET(IO_PAGE_FAULT_VFLAGS_MASK, event[0]);
+
+ dev_err(dev, "Event logged [GUEST_EVENT_FAULT gid=#%x flags=0x%04x vflags=%#x]\n",
+ gid, flags, vflags);
+ break;
+ }
+ case EVENT_TYPE_VIOMMU_HW_ERR:
+ {
+ u16 gid = event[0] & 0xFFFF;
+ u8 src = (event[0] >> 16) & 0x3;
+ u8 vflags = FIELD_GET(IO_PAGE_FAULT_VFLAGS_MASK, event[0]);
+
+ dev_err(dev, "Event logged [VIOMMU_HW_ERR gid=%#x address=%#llx src=%#x flags=%#x vflags=%#x]\n",
+ gid, address, src, flags, vflags);
+ break;
+ }
default:
dev_err(dev, "Event logged [UNKNOWN event[0]=0x%08x event[1]=0x%08x event[2]=0x%08x event[3]=0x%08x\n",
event[0], event[1], event[2], event[3]);
--
2.34.1