From: Lu Baolu <baolu.lu@linux.intel.com>
To: Joerg Roedel <joro@8bytes.org>, Will Deacon <will@kernel.org>,
Robin Murphy <robin.murphy@arm.com>,
Jason Gunthorpe <jgg@ziepe.ca>, Kevin Tian <kevin.tian@intel.com>,
Jean-Philippe Brucker <jean-philippe@linaro.org>,
Nicolin Chen <nicolinc@nvidia.com>
Cc: Yi Liu <yi.l.liu@intel.com>,
Jacob Pan <jacob.jun.pan@linux.intel.com>,
iommu@lists.linux.dev, kvm@vger.kernel.org,
linux-kernel@vger.kernel.org, Lu Baolu <baolu.lu@linux.intel.com>
Subject: [PATCH v6 02/12] iommu/arm-smmu-v3: Remove unrecoverable faults reporting
Date: Thu, 28 Sep 2023 12:27:24 +0800 [thread overview]
Message-ID: <20230928042734.16134-3-baolu.lu@linux.intel.com> (raw)
In-Reply-To: <20230928042734.16134-1-baolu.lu@linux.intel.com>
No device driver registers fault handler to handle the reported
unrecoveraable faults. Remove it to avoid dead code.
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
---
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 46 ++++++---------------
1 file changed, 13 insertions(+), 33 deletions(-)
diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
index bd0a596f9863..a2a67b0a8261 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -1469,7 +1469,6 @@ arm_smmu_find_master(struct arm_smmu_device *smmu, u32 sid)
static int arm_smmu_handle_evt(struct arm_smmu_device *smmu, u64 *evt)
{
int ret;
- u32 reason;
u32 perm = 0;
struct arm_smmu_master *master;
bool ssid_valid = evt[0] & EVTQ_0_SSV;
@@ -1479,16 +1478,9 @@ static int arm_smmu_handle_evt(struct arm_smmu_device *smmu, u64 *evt)
switch (FIELD_GET(EVTQ_0_ID, evt[0])) {
case EVT_ID_TRANSLATION_FAULT:
- reason = IOMMU_FAULT_REASON_PTE_FETCH;
- break;
case EVT_ID_ADDR_SIZE_FAULT:
- reason = IOMMU_FAULT_REASON_OOR_ADDRESS;
- break;
case EVT_ID_ACCESS_FAULT:
- reason = IOMMU_FAULT_REASON_ACCESS;
- break;
case EVT_ID_PERMISSION_FAULT:
- reason = IOMMU_FAULT_REASON_PERMISSION;
break;
default:
return -EOPNOTSUPP;
@@ -1498,6 +1490,9 @@ static int arm_smmu_handle_evt(struct arm_smmu_device *smmu, u64 *evt)
if (evt[1] & EVTQ_1_S2)
return -EFAULT;
+ if (!(evt[1] & EVTQ_1_STALL))
+ return -EOPNOTSUPP;
+
if (evt[1] & EVTQ_1_RnW)
perm |= IOMMU_FAULT_PERM_READ;
else
@@ -1509,32 +1504,17 @@ static int arm_smmu_handle_evt(struct arm_smmu_device *smmu, u64 *evt)
if (evt[1] & EVTQ_1_PnU)
perm |= IOMMU_FAULT_PERM_PRIV;
- if (evt[1] & EVTQ_1_STALL) {
- flt->type = IOMMU_FAULT_PAGE_REQ;
- flt->prm = (struct iommu_fault_page_request) {
- .flags = IOMMU_FAULT_PAGE_REQUEST_LAST_PAGE,
- .grpid = FIELD_GET(EVTQ_1_STAG, evt[1]),
- .perm = perm,
- .addr = FIELD_GET(EVTQ_2_ADDR, evt[2]),
- };
+ flt->type = IOMMU_FAULT_PAGE_REQ;
+ flt->prm = (struct iommu_fault_page_request) {
+ .flags = IOMMU_FAULT_PAGE_REQUEST_LAST_PAGE,
+ .grpid = FIELD_GET(EVTQ_1_STAG, evt[1]),
+ .perm = perm,
+ .addr = FIELD_GET(EVTQ_2_ADDR, evt[2]),
+ };
- if (ssid_valid) {
- flt->prm.flags |= IOMMU_FAULT_PAGE_REQUEST_PASID_VALID;
- flt->prm.pasid = FIELD_GET(EVTQ_0_SSID, evt[0]);
- }
- } else {
- flt->type = IOMMU_FAULT_DMA_UNRECOV;
- flt->event = (struct iommu_fault_unrecoverable) {
- .reason = reason,
- .flags = IOMMU_FAULT_UNRECOV_ADDR_VALID,
- .perm = perm,
- .addr = FIELD_GET(EVTQ_2_ADDR, evt[2]),
- };
-
- if (ssid_valid) {
- flt->event.flags |= IOMMU_FAULT_UNRECOV_PASID_VALID;
- flt->event.pasid = FIELD_GET(EVTQ_0_SSID, evt[0]);
- }
+ if (ssid_valid) {
+ flt->prm.flags |= IOMMU_FAULT_PAGE_REQUEST_PASID_VALID;
+ flt->prm.pasid = FIELD_GET(EVTQ_0_SSID, evt[0]);
}
mutex_lock(&smmu->streams_mutex);
--
2.34.1
next prev parent reply other threads:[~2023-09-28 4:31 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-28 4:27 [PATCH v6 00/12] iommu: Prepare to deliver page faults to user space Lu Baolu
2023-09-28 4:27 ` [PATCH v6 01/12] iommu: Move iommu fault data to linux/iommu.h Lu Baolu
2023-09-28 4:27 ` Lu Baolu [this message]
2023-09-28 4:27 ` [PATCH v6 03/12] iommu: Remove unrecoverable fault data Lu Baolu
2023-09-28 4:27 ` [PATCH v6 04/12] iommu: Cleanup iopf data structure definitions Lu Baolu
2023-09-28 4:27 ` [PATCH v6 05/12] iommu: Merge iopf_device_param into iommu_fault_param Lu Baolu
2023-09-28 4:27 ` [PATCH v6 06/12] iommu: Remove iommu_[un]register_device_fault_handler() Lu Baolu
2023-09-28 4:27 ` [PATCH v6 07/12] iommu: Merge iommu_fault_event and iopf_fault Lu Baolu
2023-09-28 4:27 ` [PATCH v6 08/12] iommu: Prepare for separating SVA and IOPF Lu Baolu
2023-09-28 4:27 ` [PATCH v6 09/12] iommu: Make iommu_queue_iopf() more generic Lu Baolu
2023-09-28 4:27 ` [PATCH v6 10/12] iommu: Separate SVA and IOPF Lu Baolu
2023-09-28 4:27 ` [PATCH v6 11/12] iommu: Consolidate per-device fault data management Lu Baolu
2023-09-28 4:27 ` [PATCH v6 12/12] iommu: Improve iopf_queue_flush_dev() Lu Baolu
2023-09-28 5:00 ` Tian, Kevin
2023-10-13 7:49 ` [PATCH v6 00/12] iommu: Prepare to deliver page faults to user space Yan Zhao
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