Commit 2621b65f authored by James Morse's avatar James Morse Committed by Zeng Heng
Browse files

arm_mpam: resctrl: Add empty definitions for fine-grained enables 

maillist inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I8T2RT

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/morse/linux.git/log/?h=mpam/snapshot/v6.7-rc2



---------------------------

resctrl has individual hooks to separately enable and disable the
closid/partid and rmid/pmg context switching code.

For MPAM this is all the same thing, as the value in struct task_struct
is used to cache the value that should be written to hardware.
arm64's context switching code is enabled once MPAM is usable, but
doesn't touch the hardware unless the value has changed.

Resctrl doesn't need to ask. Add empty definitions for these hoooks.

Signed-off-by: default avatarJames Morse <james.morse@arm.com>
Signed-off-by: default avatarZeng Heng <zengheng4@huawei.com>
parent 98e32907

include/linux/arm_mpam.h

+9 −0
Original line number Diff line number Diff line
@@ -87,4 +87,13 @@ static inline int resctrl_arch_measure_l3_residency(void *_plr) { return 0; } 
static inline int resctrl_arch_measure_cycles_lat_fn(void *_plr) { return 0; }

static inline u64 resctrl_arch_get_prefetch_disable_bits(void) { return 0; }



/*

 * The CPU configuration for MPAM is cheap to write, and is only written if it

 * has changed. No need for fine grained enables.

 */

static inline void resctrl_arch_enable_mon(void) { }

static inline void resctrl_arch_disable_mon(void) { }

static inline void resctrl_arch_enable_alloc(void) { }

static inline void resctrl_arch_disable_alloc(void) { }



#endif /* __LINUX_ARM_MPAM_H */