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

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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: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Reviewed-by: Fabiano Rosas <farosas@linux.ibm.com>
Link: https://lore.kernel.org/r/20220902085316.2071519-2-npiggin@gmail.com
This commit is contained in:
Nicholas Piggin 2022-09-02 18:53:13 +10:00 committed by Michael Ellerman
parent 501fe29982
commit a8933c8d55
1 changed files with 7 additions and 3 deletions
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10
arch/powerpc/include/asm/lppaca.h
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@ -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)