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

[Eric Huang]

http://gerrit-git.amd.com/c/compute/ec/libhsakmt/+/697296

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
>>