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: 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

diff --git a/arch/powerpc/include/asm/lppaca.h b/arch/powerpc/include/asm/lppaca.h
index c390ec3..34d44cb 100644 (file)
--- a/arch/powerpc/include/asm/lppaca.h
+++ b/arch/powerpc/include/asm/lppaca.h
@@ -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)