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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* 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 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 <linux/uaccess.h>
#include <linux/hugetlb.h>
#include <asm/lppaca.h>
#include <asm/hvcall.h>
#include <asm/firmware.h>
#include <asm/rtas.h>
#include <asm/time.h>
#include <asm/prom.h>
#include <asm/vdso_datapage.h>
#include <asm/vio.h>
#include <asm/mmu.h>
#include <asm/machdep.h>
#include <asm/drmem.h>
#include "pseries.h"
/*
* This isn't a module but we expose that to userspace
* via /proc so leave the definitions here
*/
#define MODULE_VERS "1.9"
#define MODULE_NAME "lparcfg"
/* #define LPARCFG_DEBUG */
/*
* Track sum of all purrs across all processors. This is used to further
* calculate usage values by different applications
*/
static void cpu_get_purr(void *arg)
{
atomic64_t *sum = arg;
atomic64_add(mfspr(SPRN_PURR), sum);
}
static unsigned long get_purr(void)
{
atomic64_t purr = ATOMIC64_INIT(0);
on_each_cpu(cpu_get_purr, &purr, 1);
return atomic64_read(&purr);
}
/*
* 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 __be32 *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_shared_proc(get_lppaca())) {
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 && (be32_to_cpup(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 !
|