[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 <aravi...@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;
 }