diff options
Diffstat (limited to 'meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/1182-drm-amd-Simplify-SDMA-HQD-loading-in-kernel-threads.patch')
| -rw-r--r-- | meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/1182-drm-amd-Simplify-SDMA-HQD-loading-in-kernel-threads.patch | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/1182-drm-amd-Simplify-SDMA-HQD-loading-in-kernel-threads.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/1182-drm-amd-Simplify-SDMA-HQD-loading-in-kernel-threads.patch new file mode 100644 index 00000000..5c77549f --- /dev/null +++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/1182-drm-amd-Simplify-SDMA-HQD-loading-in-kernel-threads.patch @@ -0,0 +1,65 @@ +From b1dbbbdaef3806740df0b00b5375f9ed7205094e Mon Sep 17 00:00:00 2001 +From: Felix Kuehling <Felix.Kuehling@amd.com> +Date: Thu, 1 Sep 2016 21:11:39 -0400 +Subject: [PATCH 1182/4131] drm/amd: Simplify SDMA HQD loading in kernel + threads + +Use the use_mm function to temporarily access a user process context +while running in a kernel thread. This avoids the need to lock the +mmap_sem, which fixes a circular locking problem observed with user +pointers while running without the HW scheduler. + +Change-Id: I4e74f3b021277e09df55dddf81ae5e070032b599 +Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com> +--- + drivers/gpu/drm/amd/amdkfd/kfd_device.c | 9 +-------- + drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c | 4 ---- + 2 files changed, 1 insertion(+), 12 deletions(-) + +diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device.c b/drivers/gpu/drm/amd/amdkfd/kfd_device.c +index 69b08a9..a47d7f1 100644 +--- a/drivers/gpu/drm/amd/amdkfd/kfd_device.c ++++ b/drivers/gpu/drm/amd/amdkfd/kfd_device.c +@@ -738,16 +738,9 @@ int kgd2kfd_resume_mm(struct kfd_dev *kfd, struct mm_struct *mm) + + r = -ENODEV; + pdd = kfd_get_process_device_data(kfd, p); +- if (pdd) { +- if (kfd->dqm->sched_policy == KFD_SCHED_POLICY_NO_HWS) +- down_read(&mm->mmap_sem); +- ++ if (pdd) + r = process_restore_queues(kfd->dqm, &pdd->qpd); + +- if (kfd->dqm->sched_policy == KFD_SCHED_POLICY_NO_HWS) +- up_read(&mm->mmap_sem); +- } +- + kfd_unref_process(p); + return r; + } +diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c +index 53fef02..d77c1ad 100644 +--- a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c ++++ b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c +@@ -408,8 +408,6 @@ static int update_queue(struct device_queue_manager *dqm, struct queue *q) + + BUG_ON(!dqm || !q || !q->mqd); + +- if (dqm->sched_policy == KFD_SCHED_POLICY_NO_HWS) +- down_read(¤t->mm->mmap_sem); + mutex_lock(&dqm->lock); + + pdd = kfd_get_process_device_data(q->device, q->process); +@@ -465,8 +463,6 @@ static int update_queue(struct device_queue_manager *dqm, struct queue *q) + + out_unlock: + mutex_unlock(&dqm->lock); +- if (dqm->sched_policy == KFD_SCHED_POLICY_NO_HWS) +- up_read(¤t->mm->mmap_sem); + + return retval; + } +-- +2.7.4 + |