[PATCH 1/3] drm/amdkfd: add new flags for svm

[Alex Deucher]

On Fri, Jun 24, 2022 at 12:03 PM Eric Huang <jinhuieric.huang at amd.com> wrote:
>
> It is to add new options for always keeping gpu mapping
> and custom of coarse grain allocation intead of fine
> grain as default.
>
> Signed-off-by: Eric Huang <jinhuieric.huang at amd.com>

Can you provide a link to the proposed userspace for this?

Alex

> ---
>  include/uapi/linux/kfd_ioctl.h | 4 ++++
>  1 file changed, 4 insertions(+)
>
> diff --git a/include/uapi/linux/kfd_ioctl.h b/include/uapi/linux/kfd_ioctl.h
> index fd49dde4d5f4..9dbf215675a0 100644
> --- a/include/uapi/linux/kfd_ioctl.h
> +++ b/include/uapi/linux/kfd_ioctl.h
> @@ -1076,6 +1076,10 @@ struct kfd_ioctl_cross_memory_copy_args {
>  #define KFD_IOCTL_SVM_FLAG_GPU_EXEC    0x00000010
>  /* GPUs mostly read, may allow similar optimizations as RO, but writes fault */
>  #define KFD_IOCTL_SVM_FLAG_GPU_READ_MOSTLY     0x00000020
> +/* Keep GPU memory mapping always valid as if XNACK is disable */
> +#define KFD_IOCTL_SVM_FLAG_GPU_ALWAYS_MAPPED   0x00000040
> +/* Allow set custom flags instead of defaults */
> +#define KFD_IOCTL_SVM_FLAG_CUSTOM      0x80000000
>
>  /**
>   * kfd_ioctl_svm_op - SVM ioctl operations
> --
> 2.25.1
>