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 <npig...@gmail.com>
---
arch/powerpc/include/asm/lppaca.h | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/include/asm/lppaca.h
b/arch/powerpc/include/asm/lppaca.h
index c390ec377bae..34d44cb17c87 100644
--- 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)
--
2.35.1
