drm/amdkfd: add new flag for uncached GPU mapping

The macro is for memory mapped by GPU as uncached.

Signed-off-by: Eric Huang <jinhuieric.huang@amd.com>
Reviewed-by: Oak Zeng <Oak.Zeng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/include/uapi/linux/kfd_ioctl.h b/include/uapi/linux/kfd_ioctl.h
index 695b606..18449f7 100644 (file)
--- a/include/uapi/linux/kfd_ioctl.h
+++ b/include/uapi/linux/kfd_ioctl.h
@@ -351,6 +351,7 @@ struct kfd_ioctl_acquire_vm_args {
 #define KFD_IOC_ALLOC_MEM_FLAGS_NO_SUBSTITUTE  (1 << 28)
 #define KFD_IOC_ALLOC_MEM_FLAGS_AQL_QUEUE_MEM  (1 << 27)
 #define KFD_IOC_ALLOC_MEM_FLAGS_COHERENT       (1 << 26)
+#define KFD_IOC_ALLOC_MEM_FLAGS_UNCACHED       (1 << 25)
 
 /* Allocate memory for later SVM (shared virtual memory) mapping.
  *