Lines Matching refs:DSCR

1 			DSCR (Data Stream Control Register)
4 DSCR register in powerpc allows user to have some control of prefetch of data
6 for more detailed information regarding how to use this DSCR to attain this
8 support for DSCR, related kernel objects, it's functionalities and exported
14 		dscr		/* Thread DSCR value */
15 		dscr_inherit	/* Thread has changed default DSCR */
18 		dscr_default	/* per-CPU DSCR default value */
21 		dscr_default	/* System DSCR default value */
25 	Scheduler will write the per-CPU DSCR default which is stored in the
27 	cleared which means that it has not changed the default DSCR till now.
29 	default DSCR value, scheduler will write the changed value which will
31 	the per-CPU default PACA based DSCR value.
33 	NOTE: Please note here that the system wide global DSCR value never
38 	Global DSCR default:		/sys/devices/system/cpu/dscr_default
39 	CPU specific DSCR default:	/sys/devices/system/cpu/cpuN/dscr
41 	Changing the global DSCR default in the sysfs will change all the CPU
42 	specific DSCR defaults immediately in their PACA structures. Again if
44 	value into every CPU's DSCR register right away and updates the current
45 	thread's DSCR value as well.
47 	Changing the CPU specific DSCR default value in the sysfs does exactly
53 	The DSCR register can be accessed in the user space using any of these
59 	Accessing DSCR through privileged SPR number (0x11) from user space
63 	Accessing DSCR through user level SPR (0x03) from user space will first
67 	the DSCR facility for the next time around (both for read and write) by
68 	setting DSCR facility in the FSCR register.
73 	in question has attempted and changed the DSCR itself using any of the
75 	use the CPU default DSCR value or its own changed DSCR value in the
80 		(3) ptrace interface	(Explicitly set user DSCR value)