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

[Alex Deucher]

On Mon, Jun 27, 2022 at 11:36 AM Eric Huang <jinhuieric.huang at amd.com> wrote:
>
> http://gerrit-git.amd.com/c/compute/ec/libhsakmt/+/697296

Got an external link?

Alex

>
> Regards,
> Eric
>
> On 2022-06-27 11:33, Alex Deucher wrote:
> > 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
> >>
>