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Commit 6fe9d1fa authored by Vaidyanathan Srinivasan's avatar Vaidyanathan Srinivasan Committed by Benjamin Herrenschmidt
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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: default avatarVaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent 9c7cc234

arch/powerpc/include/asm/hvcall.h

+1 −0
Original line number Original line Diff line number Diff line
@@ -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

arch/powerpc/kernel/lparcfg.c

+11 −1
Original line number Original line Diff line number Diff line
@@ -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;

}

}