Hi Ben,
I have cleaned up the code from the previous post:
http://lists.ozlabs.org/pipermail/linuxppc-dev/2010-February/080630.html
Changes from v1:
* Removed redundant return statements and rearranged code
Description:
A new hcall H_EM_GET_PARMS as been added to obtain power mode data
from the platform. This data can be used by user space administrative
tools for better power management.
The following patch add data from this new hcall into the lparcfg
driver and exports to user space along with other existing lpar data
in /proc/powerpc/lparcfg
Please review and include in powerpc -next tree.
Thanks,
Vaidy
---
powerpc: 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 <sva...@linux.vnet.ibm.com>
---
arch/powerpc/include/asm/hvcall.h | 1 +
arch/powerpc/kernel/lparcfg.c | 12 +++++++++++-
2 files changed, 12 insertions(+), 1 deletions(-)
diff --git a/arch/powerpc/include/asm/hvcall.h
b/arch/powerpc/include/asm/hvcall.h
index f027581..ebe7493 100644
--- a/arch/powerpc/include/asm/hvcall.h
+++ b/arch/powerpc/include/asm/hvcall.h
@@ -228,6 +228,7 @@
#define H_JOIN 0x298
#define H_VASI_STATE 0x2A4
#define H_ENABLE_CRQ 0x2B0
+#define H_GET_EM_PARMS 0x2B8
#define H_SET_MPP 0x2D0
#define H_GET_MPP 0x2D4
#define MAX_HCALL_OPCODE H_GET_MPP
diff --git a/arch/powerpc/kernel/lparcfg.c b/arch/powerpc/kernel/lparcfg.c
index d09d1c6..ff698fb 100644
--- a/arch/powerpc/kernel/lparcfg.c
+++ b/arch/powerpc/kernel/lparcfg.c
@@ -37,7 +37,7 @@
#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 */
@@ -486,6 +486,14 @@ static void splpar_dispatch_data(struct seq_file *m)
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;
@@ -540,6 +548,8 @@ static int pseries_lparcfg_data(struct seq_file *m, void *v)
seq_printf(m, "slb_size=%d\n", mmu_slb_size);
+ parse_em_data(m);
+
return 0;
}
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