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Diffstat (limited to 'common/recipes-kernel/linux/linux-yocto-4.14.71/1129-drm-amdkfd-Don-t-report-invalid-event-data-on-VM-fau.patch')
-rw-r--r--common/recipes-kernel/linux/linux-yocto-4.14.71/1129-drm-amdkfd-Don-t-report-invalid-event-data-on-VM-fau.patch63
1 files changed, 63 insertions, 0 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.14.71/1129-drm-amdkfd-Don-t-report-invalid-event-data-on-VM-fau.patch b/common/recipes-kernel/linux/linux-yocto-4.14.71/1129-drm-amdkfd-Don-t-report-invalid-event-data-on-VM-fau.patch
new file mode 100644
index 00000000..35b30579
--- /dev/null
+++ b/common/recipes-kernel/linux/linux-yocto-4.14.71/1129-drm-amdkfd-Don-t-report-invalid-event-data-on-VM-fau.patch
@@ -0,0 +1,63 @@
+From 91fb6713d5387e9ed1f421a183442698df24d673 Mon Sep 17 00:00:00 2001
+From: shaoyunl <Shaoyun.Liu@amd.com>
+Date: Fri, 1 Apr 2016 15:54:56 -0400
+Subject: [PATCH 1129/4131] drm/amdkfd: Don't report invalid event data on VM
+ fault
+
+KFD may get mulitple interrupt callback with different IH entry for the vm
+fault since driver only disable the fault status and address updating when
+handling the VM fault ISR.
+
+Ignore the IH entries that don't have correct address and status value.
+
+Set imprecise flag on events where the VMID of the fault info doesn't match
+the IH ring entry. This can happen when several processes generate faults at
+almost the same time.
+
+Change-Id: I25bd82dea4a9432cc68e02ad97d295c3d841dea4
+Signed-off-by: shaoyun liu <shaoyun.liu@amd.com>
+---
+ drivers/gpu/drm/amd/amdkfd/cik_event_interrupt.c | 4 ++++
+ drivers/gpu/drm/amd/amdkfd/kfd_events.c | 2 ++
+ 2 files changed, 6 insertions(+)
+
+diff --git a/drivers/gpu/drm/amd/amdkfd/cik_event_interrupt.c b/drivers/gpu/drm/amd/amdkfd/cik_event_interrupt.c
+index 02a9082..996b49e 100644
+--- a/drivers/gpu/drm/amd/amdkfd/cik_event_interrupt.c
++++ b/drivers/gpu/drm/amd/amdkfd/cik_event_interrupt.c
+@@ -70,8 +70,12 @@ static void cik_event_interrupt_wq(struct kfd_dev *dev,
+ ihre->source_id == CIK_INTSRC_GFX_MEM_PROT_FAULT) {
+ struct kfd_vm_fault_info info;
+
++ memset(&info, 0, sizeof(info));
+ dev->kfd2kgd->get_vm_fault_info(dev->kgd, &info);
+ kfd_process_vm_fault(dev->dqm, ihre->pasid);
++ if (!info.page_addr && !info.status)
++ return;
++
+ if (info.vmid == ihre->vmid)
+ kfd_signal_vm_fault_event(dev, ihre->pasid, &info);
+ else
+diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_events.c b/drivers/gpu/drm/amd/amdkfd/kfd_events.c
+index 23b5936..eb51873 100644
+--- a/drivers/gpu/drm/amd/amdkfd/kfd_events.c
++++ b/drivers/gpu/drm/amd/amdkfd/kfd_events.c
+@@ -1105,6 +1105,7 @@ void kfd_signal_vm_fault_event(struct kfd_dev *dev, unsigned int pasid,
+ return; /* Presumably process exited. */
+ memset(&memory_exception_data, 0, sizeof(memory_exception_data));
+ memory_exception_data.gpu_id = dev->id;
++ memory_exception_data.failure.imprecise = true;
+ /* Set failure reason */
+ if (info) {
+ memory_exception_data.va = (info->page_addr) << PAGE_SHIFT;
+@@ -1114,6 +1115,7 @@ void kfd_signal_vm_fault_event(struct kfd_dev *dev, unsigned int pasid,
+ info->prot_exec ? true : false;
+ memory_exception_data.failure.ReadOnly =
+ info->prot_write ? true : false;
++ memory_exception_data.failure.imprecise = false;
+ }
+ mutex_lock(&p->event_mutex);
+
+--
+2.7.4
+