/*
* PowerPC64 LPAR Configuration Information Driver
*
* Dave Engebretsen engebret@us.ibm.com
* Copyright (c) 2003 Dave Engebretsen
* Will Schmidt willschm@us.ibm.com
* SPLPAR updates, Copyright (c) 2003 Will Schmidt IBM Corporation.
* seq_file updates, Copyright (c) 2004 Will Schmidt IBM Corporation.
* Nathan Lynch nathanl@austin.ibm.com
* Added lparcfg_write, Copyright (C) 2004 Nathan Lynch IBM Corporation.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* This driver creates a proc file at /proc/ppc64/lparcfg which contains
* keyword - value pairs that specify the configuration of the partition.
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/proc_fs.h>
#include <linux/init.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <asm/uaccess.h>
#include <asm/iseries/hv_lp_config.h>
#include <asm/lppaca.h>
#include <asm/hvcall.h>
#include <asm/firmware.h>
#include <asm/rtas.h>
#include <asm/system.h>
#include <asm/time.h>
#include <asm/prom.h>
#include <asm/vdso_datapage.h>
#include <asm/vio.h>
#include <asm/mmu.h>
#define MODULE_VERS "1.9"
#define MODULE_NAME "lparcfg"
/* #define LPARCFG_DEBUG */
static struct proc_dir_entry *proc_ppc64_lparcfg;
/*
* Track sum of all purrs across all processors. This is used to further
* calculate usage values by different applications
*/
static unsigned long get_purr(void)
{
unsigned long sum_purr = 0;
int cpu;
for_each_possible_cpu(cpu) {
if (firmware_has_feature(FW_FEATURE_ISERIES))
sum_purr += lppaca_of(cpu).emulated_time_base;
else {
struct cpu_usage *cu;
cu = &per_cpu(cpu_usage_array, cpu);
sum_purr += cu->current_tb;
}
}
return sum_purr;
}
#ifdef CONFIG_PPC_ISERIES
/*
* Methods used to fetch LPAR data when running on an iSeries platform.
*/
static int iseries_lparcfg_data(struct seq_file *m, void *v)
{
unsigned long pool_id;
int shared, entitled_capacity, max_entitled_capacity;
int processors, max_processors;
unsigned long purr = get_purr();
shared = (int)(local_paca->lppaca_ptr->shared_proc);
seq_printf(m, "system_active_processors=%d\n",
(int)HvLpConfig_getSystemPhysicalProcessors());
seq_printf(m, "system_potential_processors=%d\n",
(int)HvLpConfig_getSystemPhysicalProcessors());
processors = (int)HvLpConfig_getPhysicalProcessors();
seq_printf(m, "partition_active_processors=%d\n", processors);
max_processors = (int)HvLpConfig_getMaxPhysicalProcessors();
seq_printf(m, "partition_potential_processors=%d\n", max_processors);
if (shared) {
entitled_capacity = HvLpConfig_getSharedProcUnits();
max_entitled_capacity = HvLpConfig_getMaxSharedProcUnits();
} else {
entitled_capacity = processors * 100;
max_entitled_capacity = max_processors * 100;
}
seq_printf(m, "partition_entitled_capacity=%d\n", entitled_capacity);
seq_printf(m, "partition_max_entitled_capacity=%d\n",
max_entitled_capacity);
if (shared) {
pool_id = HvLpConfig_getSharedPoolIndex();
seq_printf(m, "pool=%d\n", (int)pool_id);
seq_printf(m, "pool_capacity=%d\n",
(int)(HvLpConfig_getNumProcsInSharedPool(pool_id) *
100));
seq_printf(m, "purr=%ld\n", purr);
}
seq_printf(m, "shared_processor_mode=%d\n", shared);
return 0;
}
#else /* CONFIG_PPC_ISERIES */
static int iseries_lparcfg_data(struct seq_file *m, void *v)
{
return 0;
}
#endif /* CONFIG_PPC_ISERIES */
#ifdef CONFIG_PPC_PSERIES
/*
* Methods used to fetch LPAR data when running on a pSeries platform.
*/
struct hvcall_ppp_data {
u64 entitlement;
u64 unallocated_entitlement;
u16 group_num;
u16 pool_num;
u8 capped;
u8 weight;
u8 unallocated_weight;
u16 active_procs_in_pool;
u16 active_system_procs;
u16 phys_platform_procs;
u32 max_proc_cap_avail;
u32 entitled_proc_cap_avail;
};
/*
* H_GET_PPP hcall returns info in 4 parms.
* entitled_capacity,unallocated_capacity,
* aggregation, resource_capability).
*
* R4 = Entitled Processor Capacity Percentage.
* R5 = Unallocated Processor Capacity Percentage.
* R6 (AABBCCDDEEFFGGHH).
* XXXX - reserved (0)
* XXXX - reserved (0)
* XXXX - Group Number
* XXXX - Pool Number.
* R7 (IIJJKKLLMMNNOOPP).
* XX - reserved. (0)
* XX - bit 0-6 reserved (0). bit 7 is Capped indicator.
* XX - variable processor Capacity Weight
* XX - Unallocated Variable Processor Capacity Weight.
* XXXX - Active processors in Physical Processor Pool.
* XXXX - Processors active on platform.
* R8 (QQQQRRRRRRSSSSSS). if ibm,partition-performance-parameters-level >= 1
* XXXX - Physical platform procs allocated to virtualization.
* XXXXXX - Max procs capacity % available to the partitions pool.
* XXXXXX - Entitled procs capacity % available to the
* partitions pool.
*/
static unsigned int h_get_ppp(struct hvcall_ppp_data *ppp_data)
{
unsigned long rc;
unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
rc = plpar_hcall9(H_GET_PPP, retbuf);
ppp_data->entitlement = retbuf[0];
ppp_data->unallocated_entitlement = retbuf[1];
ppp_data->group_num = (retbuf[2] >> 2 * 8) & 0xffff;
ppp_data->pool_num = retbuf[2] & 0xffff;
ppp_data->capped = (retbuf[3] >> 6 * 8) & 0x01;
ppp_data->weight = (retbuf[3] >> 5 * 8) & 0xff;
ppp_data->unallocated_weight = (retbuf[3] >> 4 * 8) & 0xff;
ppp_data->active_procs_in_pool = (retbuf[3] >> 2 * 8) & 0xffff;
ppp_data->active_system_procs = retbuf[3] & 0xffff;
ppp_data->phys_platform_procs = retbuf[4] >> 6 * 8;
ppp_data->max_proc_cap_avail = (retbuf[4] >> 3 * 8) & 0xffffff;
ppp_data->entitled_proc_cap_avail = retbuf[4] & 0xffffff;
return rc;
}
static unsigned h_pic(unsigned long *pool_idle_time,
unsigned long *num_procs)
{
unsigned long rc;
unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
rc = plpar_hcall(H_PIC, retbuf);
*pool_idle_time = retbuf[0];
*num_procs = retbuf[1];
return rc;
}
/*
* parse_ppp_data
* Parse out the data returned from h_get_ppp and h_pic
*/
static void parse_ppp_data(struct seq_file *m)
{
struct hvcall_ppp_data ppp_data;
struct device_node *root;
const int *perf_level;
int rc;
rc = h_get_ppp(&ppp_data);
if (rc)
return;
seq_printf(m, "partition_entitled_capacity=%lld\n",
ppp_data.entitlement);
seq_printf(m, "group=%d\n", ppp_data.group_num);
seq_printf(m, "system_active_processors=%d\n",
ppp_data.active_system_procs);
/* pool related entries are appropriate for shared configs */
if (lppaca_of(0).shared_proc) {
unsigned long pool_idle_time, pool_procs;
seq_printf(m, "pool=%d\n", ppp_data.pool_num);
/* report pool_capacity in percentage */
seq_printf(m, "pool_capacity=%d\n",
ppp_data.active_procs_in_pool * 100);
h_pic(&pool_idle_time, &pool_procs);
seq_printf(m, "pool_idle_time=%ld\n", pool_idle_time);
seq_printf(m, "pool_num_procs=%ld\n", pool_procs);
}
seq_printf(m, "unallocated_capacity_weight=%d\n",
ppp_data.unallocated_weight);
seq_printf(m, "capacity_weight=%d\n", ppp_data.weight);
seq_printf(m, "capped=%d\n", ppp_data.capped);
seq_printf(m, "unallocated_capacity=%lld\n",
ppp_data.unallocated_entitlement);
/* The last bits of information returned from h_get_ppp are only
* valid if the ibm,partition-performance-parameters-level
* property is >= 1.
*/
root = of_find_node_by_path("/");
if (root) {
perf_level = of_get_property(root,
"ibm,partition-performance-parameters-level",
NULL);
if (perf_level && (*perf_level >= 1)) {
seq_printf(m,
"physical_procs_allocated_to_virtualization=%d\n",
ppp_data.phys_platform_procs);
seq_printf(m, "max_proc_capacity_available=%d\n",
ppp_data.max_proc_cap_avail);
seq_printf(m, "entitled_proc_capacity_available=%d\n",
ppp_data.entitled_proc_cap_avail);
}
of_node_put(root);
}
}
/**
* parse_mpp_data
* Parse out data returned from h_get_mpp
*/
static void parse_mpp_data(struct seq_file *m)
{
struct hvcall_mpp_data mpp_data;
int rc;
rc = h_get_mpp(&mpp_data);
if (rc)
return;
seq_printf(m, "entitled_memory=%ld\n", mpp_data.entitled_mem);
if (mpp_data.mapped_mem != -1)
seq_printf(m, "mapped_entitled_memory=%ld\n",
mpp_data.mapped_mem);
seq_printf(m, "entitled_memory_group_number=%d\n", mpp_data.group_num);
seq_printf(m, "entitled_memory_pool_number=%d\n", mpp_data.pool_num);
seq_printf(m, "entitled_memory_weight=%d\n", mpp_data.mem_weight);
seq_printf(m, "unallocated_entitled_memory_weight=%d\n",
mpp_data.unallocated_mem_weight);
seq_printf(m, "unallocated_io_mapping_entitlement=%ld\n",
mpp_data.unallocated_entitlement);
if (mpp_data.pool_size != -1)
seq_printf(m, "entitled_memory_pool_size=%ld bytes\n",
mpp_data.pool_size);
seq_printf(m, "entitled_memory_loan_request=%ld\n",
mpp_data.loan_request);
seq_printf(m, "backing_memory=%ld bytes\n", mpp_data.backing_mem);
}
/**
* parse_mpp_x_data
* Parse out data returned from h_get_mpp_x
*/
static void parse_mpp_x_data(struct seq_file *m)
{
struct hvcall_mpp_x_data mpp_x_data;
if (!firmware_has_feature(FW_FEATURE_XCMO))
return;
if (h_get_mpp_x(&mpp_x_data))
return;
seq_printf(m, "coalesced_bytes=%ld\n", mpp_x_data.coalesced_bytes);
if (mpp_x_data.pool_coalesced_bytes)
seq_printf(m, "pool_coalesced_bytes=%ld\n",
mpp_x_data.pool_coalesced_bytes);
if (mpp_x_data.pool_purr_cycles)
seq_printf(m, "coalesce_pool_purr=%ld\n", mpp_x_data.pool_purr_cycles);
if (mpp_x_data.pool_spurr_cycles)
seq_printf(m, "coalesce_pool_spurr=%ld\n", mpp_x_data.pool_spurr_cycles);
}
#define SPLPAR_CHARACTERISTICS_TOKEN 20
#define SPLPAR_MAXLENGTH 1026*(sizeof(char))
/*
* parse_system_parameter_string()
* Retrieve the potential_processors, max_entitled_capacity and friends
* through the get-system-parameter rtas call. Replace keyword strings as
* necessary.
*/
static void parse_system_parameter_string(struct seq_file *m)
{
int call_status;
unsigned char *local_buffer = kmalloc(SPLPAR_MAXLENGTH, GFP_KERNEL);
if (!local_buffer) {
printk(KERN_ERR "%s %s kmalloc failure at line %d\n",
__FILE__, __func__, __LINE__);
return;
}
spin_lock(&rtas_data_buf_lock);
memset(rtas_data_buf, 0, SPLPAR_MAXLENGTH);
call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1,
NULL,
SPLPAR_CHARACTERISTICS_TOKEN,
__pa(rtas_data_buf),
RTAS_DATA_BUF_SIZE);
memcpy(local_buffer, rtas_data_buf, SPLPAR_MAXLENGTH);
spin_unlock(&rtas_data_buf_lock);
if (call_status != 0) {
printk(KERN_INFO
"%s %s Error calling get-system-parameter (0x%x)\n",
__FILE__, __func__, call_status);
} else {
int splpar_strlen;
int idx, w_idx;
char *workbuffer = kzalloc(SPLPAR_MAXLENGTH, GFP_KERNEL);
if (!workbuffer) {
printk(KERN_ERR "%s %s kmalloc failure at line %d\n",
__FILE__, __func__, __LINE__);
kfree(local_buffer);
return;
}
#ifdef LPARCFG_DEBUG
printk(KERN_INFO "success calling get-system-parameter\n");
#endif
splpar_strlen = local_buffer[0] * 256 + local_buffer[1];
local_buffer += 2; /* step over strlen value */
w_idx = 0;
idx = 0;
while ((*local_buffer) && (idx < splpar_strlen)) {
workbuffer[w_idx++] = local_buffer[idx++];
if ((local_buffer[idx] == ',')
|| (local_buffer[idx] == '\0')) {
workbuffer[w_idx] = '\0';
if (w_idx) {
/* avoid the empty string */
seq_printf(m, "%s\n", workbuffer);
}
memset(workbuffer, 0, SPLPAR_MAXLENGTH);
idx++; /* skip the comma */
w_idx = 0;
} else if (local_buffer[idx] == '=') {
/* code here to replace workbuffer contents
with different keyword strings */
if (0 == strcmp(workbuffer, "MaxEntCap")) {
strcpy(workbuffer,
"partition_max_entitled_capacity");
w_idx = strlen(workbuffer);
}
if (0 == strcmp(workbuffer, "MaxPlatProcs")) {
strcpy(workbuffer,
"system_potential_processors");
w_idx = strlen(workbuffer);
}
}
}
kfree(workbuffer);
local_buffer -= 2; /* back up over strlen value */
}
kfree(local_buffer);
}
/* Return the number of processors in the system.
* This function reads through the device tree and counts
* the virtual processors, this does not include threads.
*/
static int lparcfg_count_active_processors(void)
{
struct device_node *cpus_dn = NULL;
int count = 0;
while ((cpus_dn = of_find_node_by_type(cpus_dn, "cpu"))) {
#ifdef LPARCFG_DEBUG
printk(KERN_ERR "cpus_dn %p\n", cpus_dn);
#endif
count++;
}
return count;
}
static void pseries_cmo_data(struct seq_file *m)
{
int cpu;
unsigned long cmo_faults = 0;
unsigned long cmo_fault_time = 0;
seq_printf(m, "cmo_enabled=%d\n", firmware_has_feature(FW_FEATURE_CMO));
if (!firmware_has_feature(FW_FEATURE_CMO))
return;
for_each_possible_cpu(cpu) {
cmo_faults += lppaca_of(cpu).cmo_faults;
cmo_fault_time += lppaca_of(cpu).cmo_fault_time;
}
seq_printf(m, "cmo_faults=%lu\n", cmo_faults);
seq_printf(m, "cmo_fault_time_usec=%lu\n",
cmo_fault_time / tb_ticks_per_usec);
seq_printf(m, "cmo_primary_psp=%d\n", cmo_get_primary_psp());
seq_printf(m, "cmo_secondary_psp=%d\n", cmo_get_secondary_psp());
seq_printf(m, "cmo_page_size=%lu\n", cmo_get_page_size());
}
static void splpar_dispatch_data(struct seq_file *m)
{
int cpu;
unsigned long dispatches = 0;
unsigned long dispatch_dispersions = 0;
for_each_possible_cpu(cpu) {
dispatches += lppaca_of(cpu).yield_count;
dispatch_dispersions += lppaca_of(cpu).dispersion_count;
}
seq_printf(m, "dispatches=%lu\n", dispatches);
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;
int partition_active_processors;
struct device_node *rtas_node;
const int *lrdrp = NULL;
rtas_node = of_find_node_by_path("/rtas");
if (rtas_node)
lrdrp = of_get_property(rtas_node, "ibm,lrdr-capacity", NULL);
if (lrdrp == NULL) {
partition_potential_processors = vdso_data->processorCount;
} else {
partition_potential_processors = *(lrdrp + 4);
}
of_node_put(rtas_node);
partition_active_processors = lparcfg_count_active_processors();
if (firmware_has_feature(FW_FEATURE_SPLPAR)) {
/* this call handles the ibm,get-system-parameter contents */
parse_system_parameter_string(m);
parse_ppp_data(m);
parse_mpp_data(m);
parse_mpp_x_data(m);
pseries_cmo_data(m);
splpar_dispatch_data(m);
seq_printf(m, "purr=%ld\n", get_purr());
} else { /* non SPLPAR case */
seq_printf(m, "system_active_processors=%d\n",
partition_potential_processors);
seq_printf(m, "system_potential_processors=%d\n",
partition_potential_processors);
seq_printf(m, "partition_max_entitled_capacity=%d\n",
partition_potential_processors * 100);
seq_printf(m, "partition_entitled_capacity=%d\n",
partition_active_processors * 100);
}
seq_printf(m, "partition_active_processors=%d\n",
partition_active_processors);
seq_printf(m, "partition_potential_processors=%d\n",
partition_potential_processors);
seq_printf(m, "shared_processor_mode=%d\n", lppaca_of(0).shared_proc);
seq_printf(m, "slb_size=%d\n", mmu_slb_size);
parse_em_data(m);
return 0;
}
static ssize_t update_ppp(u64 *entitlement, u8 *weight)
{
struct hvcall_ppp_data ppp_data;
u8 new_weight;
u64 new_entitled;
ssize_t retval;
/* Get our current parameters */
retval = h_get_ppp(&ppp_data);
if (retval)
return retval;
if (entitlement) {
new_weight = ppp_data.weight;
new_entitled = *entitlement;
} else if (weight) {
new_weight = *weight;
new_entitled = ppp_data.entitlement;
} else
return -EINVAL;
pr_debug("%s: current_entitled = %llu, current_weight = %u\n",
__func__, ppp_data.entitlement, ppp_data.weight);
pr_debug("%s: new_entitled = %llu, new_weight = %u\n",
__func__, new_entitled, new_weight);
retval = plpar_hcall_norets(H_SET_PPP, new_entitled, new_weight);
return retval;
}
/**
* update_mpp
*
* Update the memory entitlement and weight for the partition. Caller must
* specify either a new entitlement or weight, not both, to be updated
* since the h_set_mpp call takes both entitlement and weight as parameters.
*/
static ssize_t update_mpp(u64 *entitlement, u8 *weight)
{
struct hvcall_mpp_data mpp_data;
u64 new_entitled;
u8 new_weight;
ssize_t rc;
if (entitlement) {
/* Check with vio to ensure the new memory entitlement
* can be handled.
*/
rc = vio_cmo_entitlement_update(*entitlement);
if (rc)
return rc;
}
rc = h_get_mpp(&mpp_data);
if (rc)
return rc;
if (entitlement) {
new_weight = mpp_data.mem_weight;
new_entitled = *entitlement;
} else if (weight) {
new_weight = *weight;
new_entitled = mpp_data.entitled_mem;
} else
return -EINVAL;
pr_debug("%s: current_entitled = %lu, current_weight = %u\n",
__func__, mpp_data.entitled_mem, mpp_data.mem_weight);
pr_debug("%s: new_entitled = %llu, new_weight = %u\n",
__func__, new_entitled, new_weight);
rc = plpar_hcall_norets(H_SET_MPP, new_entitled, new_weight);
return rc;
}
/*
* Interface for changing system parameters (variable capacity weight
* and entitled capacity). Format of input is "param_name=value";
* anything after value is ignored. Valid parameters at this time are
* "partition_entitled_capacity" and "capacity_weight". We use
* H_SET_PPP to alter parameters.
*
* This function should be invoked only on systems with
* FW_FEATURE_SPLPAR.
*/
static ssize_t lparcfg_write(struct file *file, const char __user * buf,
size_t count, loff_t * off)
{
int kbuf_sz = 64;
char kbuf[kbuf_sz];
char *tmp;
u64 new_entitled, *new_entitled_ptr = &new_entitled;
u8 new_weight, *new_weight_ptr = &new_weight;
ssize_t retval;
if (!firmware_has_feature(FW_FEATURE_SPLPAR) ||
firmware_has_feature(FW_FEATURE_ISERIES))
return -EINVAL;
if (count > kbuf_sz)
return -EINVAL;
if (copy_from_user(kbuf, buf, count))
return -EFAULT;
kbuf[count - 1] = '\0';
tmp = strchr(kbuf, '=');
if (!tmp)
return -EINVAL;
*tmp++ = '\0';
if (!strcmp(kbuf, "partition_entitled_capacity")) {
char *endp;
*new_entitled_ptr = (u64) simple_strtoul(tmp, &endp, 10);
if (endp == tmp)
return -EINVAL;
retval = update_ppp(new_entitled_ptr, NULL);
} else if (!strcmp(kbuf, "capacity_weight")) {
char *endp;
*new_weight_ptr = (u8) simple_strtoul(tmp, &endp, 10);
if (endp == tmp)
return -EINVAL;
retval = update_ppp(NULL, new_weight_ptr);
} else if (!strcmp(kbuf, "entitled_memory")) {
char *endp;
*new_entitled_ptr = (u64) simple_strtoul(tmp, &endp, 10);
if (endp == tmp)
return -EINVAL;
retval = update_mpp(new_entitled_ptr, NULL);
} else if (!strcmp(kbuf, "entitled_memory_weight")) {
char *endp;
*new_weight_ptr = (u8) simple_strtoul(tmp, &endp, 10);
if (endp == tmp)
return -EINVAL;
retval = update_mpp(NULL, new_weight_ptr);
} else
return -EINVAL;
if (retval == H_SUCCESS || retval == H_CONSTRAINED) {
retval = count;
} else if (retval == H_BUSY) {
retval = -EBUSY;
} else if (retval == H_HARDWARE) {
retval = -EIO;
} else if (retval == H_PARAMETER) {
retval = -EINVAL;
}
return retval;
}
#else /* CONFIG_PPC_PSERIES */
static int pseries_lparcfg_data(struct seq_file *m, void *v)
{
return 0;
}
static ssize_t lparcfg_write(struct file *file, const char __user * buf,
size_t count, loff_t * off)
{
return -EINVAL;
}
#endif /* CONFIG_PPC_PSERIES */
static int lparcfg_data(struct seq_file *m, void *v)
{
struct device_node *rootdn;
const char *model = "";
const char *system_id = "";
const char *tmp;
const unsigned int *lp_index_ptr;
unsigned int lp_index = 0;
seq_printf(m, "%s %s\n", MODULE_NAME, MODULE_VERS);
rootdn = of_find_node_by_path("/");
if (rootdn) {
tmp = of_get_property(rootdn, "model", NULL);
if (tmp) {
model = tmp;
/* Skip "IBM," - see platforms/iseries/dt.c */
if (firmware_has_feature(FW_FEATURE_ISERIES))
model += 4;
}
tmp = of_get_property(rootdn, "system-id", NULL);
if (tmp) {
system_id = tmp;
/* Skip "IBM," - see platforms/iseries/dt.c */
if (firmware_has_feature(FW_FEATURE_ISERIES))
system_id += 4;
}
lp_index_ptr = of_get_property(rootdn, "ibm,partition-no",
NULL);
if (lp_index_ptr)
lp_index = *lp_index_ptr;
of_node_put(rootdn);
}
seq_printf(m, "serial_number=%s\n", system_id);
seq_printf(m, "system_type=%s\n", model);
seq_printf(m, "partition_id=%d\n", (int)lp_index);
if (firmware_has_feature(FW_FEATURE_ISERIES))
return iseries_lparcfg_data(m, v);
return pseries_lparcfg_data(m, v);
}
static int lparcfg_open(struct inode *inode, struct file *file)
{
return single_open(file, lparcfg_data, NULL);
}
static const struct file_operations lparcfg_fops = {
.owner = THIS_MODULE,
.read = seq_read,
.write = lparcfg_write,
.open = lparcfg_open,
.release = single_release,
.llseek = seq_lseek,
};
static int __init lparcfg_init(void)
{
struct proc_dir_entry *ent;
mode_t mode = S_IRUSR | S_IRGRP | S_IROTH;
/* Allow writing if we have FW_FEATURE_SPLPAR */
if (firmware_has_feature(FW_FEATURE_SPLPAR) &&
!firmware_has_feature(FW_FEATURE_ISERIES))
mode |= S_IWUSR;
ent = proc_create("powerpc/lparcfg", mode, NULL, &lparcfg_fops);
if (!ent) {
printk(KERN_ERR "Failed to create powerpc/lparcfg\n");
return -EIO;
}
proc_ppc64_lparcfg = ent;
return 0;
}
static void __exit lparcfg_cleanup(void)
{
if (proc_ppc64_lparcfg)
remove_proc_entry("lparcfg", proc_ppc64_lparcfg->parent);
}
module_init(lparcfg_init);
module_exit(lparcfg_cleanup);
MODULE_DESCRIPTION("Interface for LPAR configuration data");
MODULE_AUTHOR("Dave Engebretsen");
MODULE_LICENSE("GPL");