[PATCH] powerpc/pseries: Export VPA related data

[Aravinda Prasad]

This patch exports VPA related data such as stolen and
donated CPU cycles through /proc/powerpc/lparcfg file.

Signed-off-by: Aravinda Prasad <aravinda at linux.vnet.ibm.com>
---
 arch/powerpc/include/asm/lppaca.h        |   10 ++++++-
 arch/powerpc/platforms/pseries/lparcfg.c |   45 ++++++++++++++++++++++++++++++
 2 files changed, 54 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/include/asm/lppaca.h b/arch/powerpc/include/asm/lppaca.h
index 7c23ce8..87e22f6 100644
--- a/arch/powerpc/include/asm/lppaca.h
+++ b/arch/powerpc/include/asm/lppaca.h
@@ -94,7 +94,15 @@ 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];
+	volatile __be64 idle_stolen_purr;
+	volatile __be64 idle_stolen_spurr;
+	volatile __be64 busy_stolen_purr;
+	volatile __be64 busy_stolen_spurr;
+	volatile __be64 idle_donated_purr;
+	volatile __be64 idle_donated_spurr;
+	volatile __be64 busy_donated_purr;
+	volatile __be64 busy_donated_spurr;
+	u8  reserved10[40];
 
 	/* cacheline 4-5 */
 
diff --git a/arch/powerpc/platforms/pseries/lparcfg.c b/arch/powerpc/platforms/pseries/lparcfg.c
index 7c872dc..b986551 100644
--- a/arch/powerpc/platforms/pseries/lparcfg.c
+++ b/arch/powerpc/platforms/pseries/lparcfg.c
@@ -433,6 +433,50 @@ static void parse_em_data(struct seq_file *m)
 		seq_printf(m, "power_mode_data=%016lx\n", retbuf[0]);
 }
 
+static void pseries_vpa_data(struct seq_file *m)
+{
+	int cpu;
+	unsigned long idle_stolen_purr = 0;
+	unsigned long idle_stolen_spurr = 0;
+	unsigned long busy_stolen_purr = 0;
+	unsigned long busy_stolen_spurr = 0;
+	unsigned long idle_donated_purr = 0;
+	unsigned long idle_donated_spurr = 0;
+	unsigned long busy_donated_purr = 0;
+	unsigned long busy_donated_spurr = 0;
+
+	if (!firmware_has_feature(FW_FEATURE_SPLPAR))
+		return;
+
+	for_each_possible_cpu(cpu) {
+		idle_stolen_purr +=
+			be64_to_cpu(lppaca_of(cpu).idle_stolen_purr);
+		idle_stolen_spurr +=
+			be64_to_cpu(lppaca_of(cpu).idle_stolen_spurr);
+		busy_stolen_purr +=
+			be64_to_cpu(lppaca_of(cpu).busy_stolen_purr);
+		busy_stolen_spurr +=
+			be64_to_cpu(lppaca_of(cpu).busy_stolen_spurr);
+		idle_donated_purr +=
+			be64_to_cpu(lppaca_of(cpu).idle_donated_purr);
+		idle_donated_spurr +=
+			be64_to_cpu(lppaca_of(cpu).idle_donated_spurr);
+		busy_donated_purr +=
+			be64_to_cpu(lppaca_of(cpu).busy_donated_purr);
+		busy_donated_spurr +=
+			be64_to_cpu(lppaca_of(cpu).busy_donated_spurr);
+	}
+
+	seq_printf(m, "idle_stolen_purr=%lu\n", idle_stolen_purr);
+	seq_printf(m, "idle_stolen_spurr=%lu\n", idle_stolen_spurr);
+	seq_printf(m, "busy_stolen_purr=%lu\n", busy_stolen_purr);
+	seq_printf(m, "busy_stolen_spurr=%lu\n", busy_stolen_spurr);
+	seq_printf(m, "idle_donated_purr=%lu\n", idle_donated_purr);
+	seq_printf(m, "idle_donated_spurr=%lu\n", idle_donated_spurr);
+	seq_printf(m, "busy_donated_purr=%lu\n", busy_donated_purr);
+	seq_printf(m, "busy_donated_spurr=%lu\n", busy_donated_spurr);
+}
+
 static int pseries_lparcfg_data(struct seq_file *m, void *v)
 {
 	int partition_potential_processors;
@@ -491,6 +535,7 @@ static int pseries_lparcfg_data(struct seq_file *m, void *v)
 	seq_printf(m, "slb_size=%d\n", mmu_slb_size);
 #endif
 	parse_em_data(m);
+	pseries_vpa_data(m);
 
 	return 0;
 }