lkml.org 
[lkml]   [2020]   [Sep]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 2/3] iommu: amd: Add support for RMP_PAGE_FAULT and RMP_HW_ERR
Date
IOMMU SNP support introduces two new IOMMU events:
* RMP Page Fault event
* RMP Hardware Error event

Hence, add reporting functions for these events.

Cc: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
---
drivers/iommu/amd/amd_iommu_types.h | 2 +
drivers/iommu/amd/iommu.c | 61 +++++++++++++++++++++++++++++
2 files changed, 63 insertions(+)

diff --git a/drivers/iommu/amd/amd_iommu_types.h b/drivers/iommu/amd/amd_iommu_types.h
index 4c80483e78ec..1e7966c73707 100644
--- a/drivers/iommu/amd/amd_iommu_types.h
+++ b/drivers/iommu/amd/amd_iommu_types.h
@@ -128,6 +128,8 @@
#define EVENT_TYPE_IOTLB_INV_TO 0x7
#define EVENT_TYPE_INV_DEV_REQ 0x8
#define EVENT_TYPE_INV_PPR_REQ 0x9
+#define EVENT_TYPE_RMP_FAULT 0xd
+#define EVENT_TYPE_RMP_HW_ERR 0xe
#define EVENT_DEVID_MASK 0xffff
#define EVENT_DEVID_SHIFT 0
#define EVENT_DOMID_MASK_LO 0xffff
diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index a1d2c749a21f..73c035161f28 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -486,6 +486,61 @@ static void dump_command(unsigned long phys_addr)
pr_err("CMD[%d]: %08x\n", i, cmd->data[i]);
}

+static void amd_iommu_report_rmp_hw_error(volatile u32 *event)
+{
+ struct pci_dev *pdev;
+ struct iommu_dev_data *dev_data = NULL;
+ int devid = (event[0] >> EVENT_DEVID_SHIFT) & EVENT_DEVID_MASK;
+ int vmg_tag = (event[1]) & 0xFFFF;
+ int flags = (event[1] >> EVENT_FLAGS_SHIFT) & EVENT_FLAGS_MASK;
+ u64 spa = ((u64)event[3] << 32) | (event[2] & 0xFFFFFFF8);
+
+ pdev = pci_get_domain_bus_and_slot(0, PCI_BUS_NUM(devid),
+ devid & 0xff);
+ if (pdev)
+ dev_data = dev_iommu_priv_get(&pdev->dev);
+
+ if (dev_data && __ratelimit(&dev_data->rs)) {
+ pci_err(pdev, "Event logged [RMP_HW_ERROR devid=0x%04x, vmg_tag=0x%04x, spa=0x%llx, flags=0x%04x]\n",
+ devid, vmg_tag, spa, flags);
+ } else {
+ pr_err_ratelimited("Event logged [RMP_HW_ERROR device=%02x:%02x.%x, vmg_tag=0x%04x, spa=0x%llx, flags=0x%04x]\n",
+ PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid),
+ vmg_tag, spa, flags);
+ }
+
+ if (pdev)
+ pci_dev_put(pdev);
+}
+
+static void amd_iommu_report_rmp_fault(volatile u32 *event)
+{
+ struct pci_dev *pdev;
+ struct iommu_dev_data *dev_data = NULL;
+ int devid = (event[0] >> EVENT_DEVID_SHIFT) & EVENT_DEVID_MASK;
+ int flags_rmp = (event[0] >> EVENT_FLAGS_SHIFT) & 0xFF;
+ int vmg_tag = (event[1]) & 0xFFFF;
+ int flags = (event[1] >> EVENT_FLAGS_SHIFT) & EVENT_FLAGS_MASK;
+ u64 gpa = ((u64)event[3] << 32) | event[2];
+
+ pdev = pci_get_domain_bus_and_slot(0, PCI_BUS_NUM(devid),
+ devid & 0xff);
+ if (pdev)
+ dev_data = dev_iommu_priv_get(&pdev->dev);
+
+ if (dev_data && __ratelimit(&dev_data->rs)) {
+ pci_err(pdev, "Event logged [RMP_PAGE_FAULT devid=0x%04x, vmg_tag=0x%04x, gpa=0x%llx, flags_rmp=0x%04x, flags=0x%04x]\n",
+ devid, vmg_tag, gpa, flags_rmp, flags);
+ } else {
+ pr_err_ratelimited("Event logged [RMP_PAGE_FAULT device=%02x:%02x.%x, vmg_tag=0x%04x, gpa=0x%llx, flags_rmp=0x%04x, flags=0x%04x]\n",
+ PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid),
+ vmg_tag, gpa, flags_rmp, flags);
+ }
+
+ if (pdev)
+ pci_dev_put(pdev);
+}
+
static void amd_iommu_report_page_fault(u16 devid, u16 domain_id,
u64 address, int flags)
{
@@ -577,6 +632,12 @@ static void iommu_print_event(struct amd_iommu *iommu, void *__evt)
PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid),
pasid, address, flags);
break;
+ case EVENT_TYPE_RMP_FAULT:
+ amd_iommu_report_rmp_fault(event);
+ break;
+ case EVENT_TYPE_RMP_HW_ERR:
+ amd_iommu_report_rmp_hw_error(event);
+ break;
case EVENT_TYPE_INV_PPR_REQ:
pasid = PPR_PASID(*((u64 *)__evt));
tag = event[1] & 0x03FF;
--
2.17.1
\
 
 \ /
  Last update: 2020-09-16 21:09    [W:0.075 / U:0.288 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site