drm/amdkfd: Add support for more per-process flag

Add support for more per-process flags starting with option to configure
MFMA precision for gfx 9.5

v2: Change flag name to KFD_PROC_FLAG_MFMA_HIGH_PRECISION
    Remove unused else condition
v3: Bump the KFD API version
v4: Missed SH_MEM_CONFIG__PRECISION_MODE__SHIFT define. Added it.

Signed-off-by: Harish Kasiviswanathan <Harish.Kasiviswanathan@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Reviewed-by: Amber Lin <Amber.Lin@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

include/uapi/linux/kfd_ioctl.h

@@ -43,9 +43,10 @@
  * - 1.15 - Enable managing mappings in compute VMs with GEM_VA ioctl
  * - 1.16 - Add contiguous VRAM allocation flag
  * - 1.17 - Add SDMA queue creation with target SDMA engine ID
+ * - 1.18 - Rename pad in set_memory_policy_args to misc_process_flag
  */
 #define KFD_IOCTL_MAJOR_VERSION 1
-#define KFD_IOCTL_MINOR_VERSION 17
+#define KFD_IOCTL_MINOR_VERSION 18
 
 struct kfd_ioctl_get_version_args {
 	__u32 major_version;	/* from KFD */
@@ -150,6 +151,9 @@ struct kfd_dbg_device_info_entry {
 #define KFD_IOC_CACHE_POLICY_COHERENT 0
 #define KFD_IOC_CACHE_POLICY_NONCOHERENT 1
 
+/* Misc. per process flags */
+#define KFD_PROC_FLAG_MFMA_HIGH_PRECISION (1 << 0)
+
 struct kfd_ioctl_set_memory_policy_args {
 	__u64 alternate_aperture_base;	/* to KFD */
 	__u64 alternate_aperture_size;	/* to KFD */
@@ -157,7 +161,7 @@ struct kfd_ioctl_set_memory_policy_args {
 	__u32 gpu_id;			/* to KFD */
 	__u32 default_policy;		/* to KFD */
 	__u32 alternate_policy;		/* to KFD */
-	__u32 pad;
+	__u32 misc_process_flag;        /* to KFD */
 };
 
 /*