powerpc/pseries: Export data from new hcall H_EM_GET_PARMS
Add support for H_EM_GET_PARMS hcall that will return data
related to power modes from the platform. Export the data
directly to user space for administrative tools to interpret
and use.
cat /proc/powerpc/lparcfg will export power mode data
Signed-off-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/kernel/lparcfg.c b/arch/powerpc/kernel/lparcfg.c
index c2c70e1..50362b6 100644
--- a/arch/powerpc/kernel/lparcfg.c
+++ b/arch/powerpc/kernel/lparcfg.c
@@ -38,7 +38,7 @@
#include <asm/vio.h>
#include <asm/mmu.h>
-#define MODULE_VERS "1.8"
+#define MODULE_VERS "1.9"
#define MODULE_NAME "lparcfg"
/* #define LPARCFG_DEBUG */
@@ -487,6 +487,14 @@
seq_printf(m, "dispatch_dispersions=%lu\n", dispatch_dispersions);
}
+static void parse_em_data(struct seq_file *m)
+{
+ unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
+
+ if (plpar_hcall(H_GET_EM_PARMS, retbuf) == H_SUCCESS)
+ seq_printf(m, "power_mode_data=%016lx\n", retbuf[0]);
+}
+
static int pseries_lparcfg_data(struct seq_file *m, void *v)
{
int partition_potential_processors;
@@ -541,6 +549,8 @@
seq_printf(m, "slb_size=%d\n", mmu_slb_size);
+ parse_em_data(m);
+
return 0;
}
