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drm/amdkfd: Disable SVM per GPU, not per process

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When some GPUs don't support SVM, don't disabe it for the entire process.
That would be inconsistent with the information the process got from the
topology, which indicates SVM support per GPU.

Instead disable SVM support only for the unsupported GPUs. This is done
by checking any per-device attributes against the bitmap of supported
GPUs. Also use the supported GPU bitmap to initialize access bitmaps for
new SVM address ranges.

Don't handle recoverable page faults from unsupported GPUs. (I don't
think there will be unsupported GPUs that can generate recoverable page
faults. But better safe than sorry.)

Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Philip Yang <philip.yang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Felix Kuehling
2021-06-10 18:39:56 -04:00
committed by Alex Deucher
parent d0414a834c
commit 5a75ea56e3
7 changed files with 45 additions and 38 deletions
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2
drivers/gpu/drm/amd/amdkfd/kfd_priv.h
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@@ -743,6 +743,7 @@ struct svm_range_list {
spinlock_t deferred_list_lock;
atomic_t evicted_ranges;
struct delayed_work restore_work;
DECLARE_BITMAP(bitmap_supported, MAX_GPU_INSTANCE);
};
/* Process data */
@@ -826,7 +827,6 @@ struct kfd_process {
/* shared virtual memory registered by this process */
struct svm_range_list svms;
bool svm_disabled;
bool xnack_enabled;
};