Commit a8933c8d authored by Nicholas Piggin's avatar Nicholas Piggin Committed by Michael Ellerman
Browse files

powerpc/pseries: Add wait interval counter definitions to struct lppaca 



The hypervisor exposes accumulated partition scheduling interval times
in the VPA (lppaca). These can be used to implement a simple stolen time
in the guest without complex and costly dtl scanning.

Signed-off-by: default avatarNicholas Piggin <npiggin@gmail.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Reviewed-by: default avatarFabiano Rosas <farosas@linux.ibm.com>
Link: https://lore.kernel.org/r/20220902085316.2071519-2-npiggin@gmail.com
parent 501fe299

arch/powerpc/include/asm/lppaca.h

+7 −3
Original line number Diff line number Diff line
@@ -104,14 +104,18 @@ struct lppaca { 
	volatile __be32 dispersion_count; /* dispatch changed physical cpu */

	volatile __be64 cmo_faults;	/* CMO page fault count */

	volatile __be64 cmo_fault_time;	/* CMO page fault time */

	u8	reserved10[104];

	u8	reserved10[64];		/* [S]PURR expropriated/donated */

	volatile __be64 enqueue_dispatch_tb; /* Total TB enqueue->dispatch */

	volatile __be64 ready_enqueue_tb; /* Total TB ready->enqueue */

	volatile __be64 wait_ready_tb;	/* Total TB wait->ready */

	u8	reserved11[16];



	/* cacheline 4-5 */



	__be32	page_ins;		/* CMO Hint - # page ins by OS */

	u8	reserved11[148];

	u8	reserved12[148];

	volatile __be64 dtl_idx;	/* Dispatch Trace Log head index */

	u8	reserved12[96];

	u8	reserved13[96];

} ____cacheline_aligned;



#define lppaca_of(cpu)	(*paca_ptrs[cpu]->lppaca_ptr)