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powerpc/pseries: Export data from new hcall H_EM_GET_PARMS

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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>
This commit is contained in:
Vaidyanathan Srinivasan 2010-03-31 21:39:24 +00:00 committed by Benjamin Herrenschmidt
parent 9c7cc234dc
commit 6fe9d1facb
2 changed files with 12 additions and 1 deletions
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1
arch/powerpc/include/asm/hvcall.h
View File

@ -228,6 +228,7 @@
#define H_JOIN 0x298 #define H_JOIN 0x298
#define H_VASI_STATE 0x2A4 #define H_VASI_STATE 0x2A4
#define H_ENABLE_CRQ 0x2B0 #define H_ENABLE_CRQ 0x2B0
#define H_GET_EM_PARMS 0x2B8
#define H_SET_MPP 0x2D0 #define H_SET_MPP 0x2D0
#define H_GET_MPP 0x2D4 #define H_GET_MPP 0x2D4
#define MAX_HCALL_OPCODE H_GET_MPP #define MAX_HCALL_OPCODE H_GET_MPP

12
arch/powerpc/kernel/lparcfg.c
View File

@ -38,7 +38,7 @@
#include <asm/vio.h> #include <asm/vio.h>
#include <asm/mmu.h> #include <asm/mmu.h>
#define MODULE_VERS "1.8" #define MODULE_VERS "1.9"
#define MODULE_NAME "lparcfg" #define MODULE_NAME "lparcfg"
/* #define LPARCFG_DEBUG */ /* #define LPARCFG_DEBUG */
@ -487,6 +487,14 @@ static void splpar_dispatch_data(struct seq_file *m)
seq_printf(m, "dispatch_dispersions=%lu\n", dispatch_dispersions); 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) static int pseries_lparcfg_data(struct seq_file *m, void *v)
{ {
int partition_potential_processors; int partition_potential_processors;
@ -541,6 +549,8 @@ static int pseries_lparcfg_data(struct seq_file *m, void *v)
seq_printf(m, "slb_size=%d\n", mmu_slb_size); seq_printf(m, "slb_size=%d\n", mmu_slb_size);
parse_em_data(m);
return 0; return 0;
} }