859 lines
23 KiB
C
859 lines
23 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* PowerPC64 LPAR Configuration Information Driver
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*
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* Dave Engebretsen engebret@us.ibm.com
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* Copyright (c) 2003 Dave Engebretsen
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* Will Schmidt willschm@us.ibm.com
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* SPLPAR updates, Copyright (c) 2003 Will Schmidt IBM Corporation.
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* seq_file updates, Copyright (c) 2004 Will Schmidt IBM Corporation.
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* Nathan Lynch nathanl@austin.ibm.com
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* Added lparcfg_write, Copyright (C) 2004 Nathan Lynch IBM Corporation.
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*
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* This driver creates a proc file at /proc/ppc64/lparcfg which contains
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* keyword - value pairs that specify the configuration of the partition.
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/proc_fs.h>
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#include <linux/init.h>
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#include <linux/seq_file.h>
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#include <linux/slab.h>
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#include <linux/uaccess.h>
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#include <linux/hugetlb.h>
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#include <asm/lppaca.h>
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#include <asm/hvcall.h>
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#include <asm/firmware.h>
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#include <asm/rtas.h>
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#include <asm/time.h>
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#include <asm/vdso_datapage.h>
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#include <asm/vio.h>
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#include <asm/mmu.h>
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#include <asm/machdep.h>
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#include <asm/drmem.h>
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#include "pseries.h"
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#include "vas.h" /* pseries_vas_dlpar_cpu() */
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/*
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* This isn't a module but we expose that to userspace
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* via /proc so leave the definitions here
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*/
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#define MODULE_VERS "1.9"
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#define MODULE_NAME "lparcfg"
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/* #define LPARCFG_DEBUG */
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/*
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* Track sum of all purrs across all processors. This is used to further
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* calculate usage values by different applications
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*/
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static void cpu_get_purr(void *arg)
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{
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atomic64_t *sum = arg;
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atomic64_add(mfspr(SPRN_PURR), sum);
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}
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static unsigned long get_purr(void)
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{
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atomic64_t purr = ATOMIC64_INIT(0);
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on_each_cpu(cpu_get_purr, &purr, 1);
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return atomic64_read(&purr);
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}
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/*
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* Methods used to fetch LPAR data when running on a pSeries platform.
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*/
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struct hvcall_ppp_data {
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u64 entitlement;
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u64 unallocated_entitlement;
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u16 group_num;
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u16 pool_num;
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u8 capped;
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u8 weight;
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u8 unallocated_weight;
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u16 active_procs_in_pool;
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u16 active_system_procs;
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u16 phys_platform_procs;
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u32 max_proc_cap_avail;
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u32 entitled_proc_cap_avail;
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};
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/*
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* H_GET_PPP hcall returns info in 4 parms.
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* entitled_capacity,unallocated_capacity,
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* aggregation, resource_capability).
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*
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* R4 = Entitled Processor Capacity Percentage.
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* R5 = Unallocated Processor Capacity Percentage.
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* R6 (AABBCCDDEEFFGGHH).
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* XXXX - reserved (0)
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* XXXX - reserved (0)
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* XXXX - Group Number
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* XXXX - Pool Number.
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* R7 (IIJJKKLLMMNNOOPP).
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* XX - reserved. (0)
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* XX - bit 0-6 reserved (0). bit 7 is Capped indicator.
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* XX - variable processor Capacity Weight
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* XX - Unallocated Variable Processor Capacity Weight.
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* XXXX - Active processors in Physical Processor Pool.
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* XXXX - Processors active on platform.
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* R8 (QQQQRRRRRRSSSSSS). if ibm,partition-performance-parameters-level >= 1
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* XXXX - Physical platform procs allocated to virtualization.
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* XXXXXX - Max procs capacity % available to the partitions pool.
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* XXXXXX - Entitled procs capacity % available to the
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* partitions pool.
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*/
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static unsigned int h_get_ppp(struct hvcall_ppp_data *ppp_data)
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{
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unsigned long retbuf[PLPAR_HCALL9_BUFSIZE] = {0};
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long rc;
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rc = plpar_hcall9(H_GET_PPP, retbuf);
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ppp_data->entitlement = retbuf[0];
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ppp_data->unallocated_entitlement = retbuf[1];
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ppp_data->group_num = (retbuf[2] >> 2 * 8) & 0xffff;
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ppp_data->pool_num = retbuf[2] & 0xffff;
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ppp_data->capped = (retbuf[3] >> 6 * 8) & 0x01;
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ppp_data->weight = (retbuf[3] >> 5 * 8) & 0xff;
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ppp_data->unallocated_weight = (retbuf[3] >> 4 * 8) & 0xff;
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ppp_data->active_procs_in_pool = (retbuf[3] >> 2 * 8) & 0xffff;
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ppp_data->active_system_procs = retbuf[3] & 0xffff;
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ppp_data->phys_platform_procs = retbuf[4] >> 6 * 8;
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ppp_data->max_proc_cap_avail = (retbuf[4] >> 3 * 8) & 0xffffff;
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ppp_data->entitled_proc_cap_avail = retbuf[4] & 0xffffff;
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return rc;
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}
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static void show_gpci_data(struct seq_file *m)
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{
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struct hv_gpci_request_buffer *buf;
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unsigned int affinity_score;
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long ret;
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buf = kmalloc(sizeof(*buf), GFP_KERNEL);
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if (buf == NULL)
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return;
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/*
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* Show the local LPAR's affinity score.
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*
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* 0xB1 selects the Affinity_Domain_Info_By_Partition subcall.
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* The score is at byte 0xB in the output buffer.
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*/
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memset(&buf->params, 0, sizeof(buf->params));
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buf->params.counter_request = cpu_to_be32(0xB1);
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buf->params.starting_index = cpu_to_be32(-1); /* local LPAR */
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buf->params.counter_info_version_in = 0x5; /* v5+ for score */
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ret = plpar_hcall_norets(H_GET_PERF_COUNTER_INFO, virt_to_phys(buf),
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sizeof(*buf));
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if (ret != H_SUCCESS) {
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pr_debug("hcall failed: H_GET_PERF_COUNTER_INFO: %ld, %x\n",
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ret, be32_to_cpu(buf->params.detail_rc));
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goto out;
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}
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affinity_score = buf->bytes[0xB];
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seq_printf(m, "partition_affinity_score=%u\n", affinity_score);
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out:
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kfree(buf);
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}
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static unsigned h_pic(unsigned long *pool_idle_time,
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unsigned long *num_procs)
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{
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unsigned long rc;
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unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
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rc = plpar_hcall(H_PIC, retbuf);
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*pool_idle_time = retbuf[0];
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*num_procs = retbuf[1];
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return rc;
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}
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/*
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* parse_ppp_data
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* Parse out the data returned from h_get_ppp and h_pic
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*/
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static void parse_ppp_data(struct seq_file *m)
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{
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struct hvcall_ppp_data ppp_data;
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struct device_node *root;
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const __be32 *perf_level;
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long rc;
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rc = h_get_ppp(&ppp_data);
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if (rc)
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return;
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seq_printf(m, "partition_entitled_capacity=%lld\n",
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ppp_data.entitlement);
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seq_printf(m, "group=%d\n", ppp_data.group_num);
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seq_printf(m, "system_active_processors=%d\n",
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ppp_data.active_system_procs);
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/* pool related entries are appropriate for shared configs */
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if (lppaca_shared_proc()) {
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unsigned long pool_idle_time, pool_procs;
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seq_printf(m, "pool=%d\n", ppp_data.pool_num);
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/* report pool_capacity in percentage */
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seq_printf(m, "pool_capacity=%d\n",
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ppp_data.active_procs_in_pool * 100);
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h_pic(&pool_idle_time, &pool_procs);
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seq_printf(m, "pool_idle_time=%ld\n", pool_idle_time);
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seq_printf(m, "pool_num_procs=%ld\n", pool_procs);
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}
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seq_printf(m, "unallocated_capacity_weight=%d\n",
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ppp_data.unallocated_weight);
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seq_printf(m, "capacity_weight=%d\n", ppp_data.weight);
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seq_printf(m, "capped=%d\n", ppp_data.capped);
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seq_printf(m, "unallocated_capacity=%lld\n",
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ppp_data.unallocated_entitlement);
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/* The last bits of information returned from h_get_ppp are only
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* valid if the ibm,partition-performance-parameters-level
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* property is >= 1.
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*/
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root = of_find_node_by_path("/");
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if (root) {
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perf_level = of_get_property(root,
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"ibm,partition-performance-parameters-level",
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NULL);
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if (perf_level && (be32_to_cpup(perf_level) >= 1)) {
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seq_printf(m,
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"physical_procs_allocated_to_virtualization=%d\n",
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ppp_data.phys_platform_procs);
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seq_printf(m, "max_proc_capacity_available=%d\n",
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ppp_data.max_proc_cap_avail);
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seq_printf(m, "entitled_proc_capacity_available=%d\n",
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ppp_data.entitled_proc_cap_avail);
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}
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of_node_put(root);
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}
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}
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/**
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* parse_mpp_data
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* Parse out data returned from h_get_mpp
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*/
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static void parse_mpp_data(struct seq_file *m)
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{
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struct hvcall_mpp_data mpp_data;
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int rc;
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rc = h_get_mpp(&mpp_data);
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if (rc)
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return;
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seq_printf(m, "entitled_memory=%ld\n", mpp_data.entitled_mem);
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if (mpp_data.mapped_mem != -1)
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seq_printf(m, "mapped_entitled_memory=%ld\n",
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mpp_data.mapped_mem);
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seq_printf(m, "entitled_memory_group_number=%d\n", mpp_data.group_num);
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seq_printf(m, "entitled_memory_pool_number=%d\n", mpp_data.pool_num);
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seq_printf(m, "entitled_memory_weight=%d\n", mpp_data.mem_weight);
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seq_printf(m, "unallocated_entitled_memory_weight=%d\n",
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mpp_data.unallocated_mem_weight);
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seq_printf(m, "unallocated_io_mapping_entitlement=%ld\n",
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mpp_data.unallocated_entitlement);
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if (mpp_data.pool_size != -1)
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seq_printf(m, "entitled_memory_pool_size=%ld bytes\n",
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mpp_data.pool_size);
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seq_printf(m, "entitled_memory_loan_request=%ld\n",
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mpp_data.loan_request);
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seq_printf(m, "backing_memory=%ld bytes\n", mpp_data.backing_mem);
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}
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/**
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* parse_mpp_x_data
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* Parse out data returned from h_get_mpp_x
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*/
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static void parse_mpp_x_data(struct seq_file *m)
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{
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struct hvcall_mpp_x_data mpp_x_data;
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if (!firmware_has_feature(FW_FEATURE_XCMO))
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return;
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if (h_get_mpp_x(&mpp_x_data))
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return;
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seq_printf(m, "coalesced_bytes=%ld\n", mpp_x_data.coalesced_bytes);
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if (mpp_x_data.pool_coalesced_bytes)
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seq_printf(m, "pool_coalesced_bytes=%ld\n",
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mpp_x_data.pool_coalesced_bytes);
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if (mpp_x_data.pool_purr_cycles)
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seq_printf(m, "coalesce_pool_purr=%ld\n", mpp_x_data.pool_purr_cycles);
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if (mpp_x_data.pool_spurr_cycles)
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seq_printf(m, "coalesce_pool_spurr=%ld\n", mpp_x_data.pool_spurr_cycles);
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}
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/*
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* PAPR defines, in section "7.3.16 System Parameters Option", the token 55 to
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* read the LPAR name, and the largest output data to 4000 + 2 bytes length.
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*/
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#define SPLPAR_LPAR_NAME_TOKEN 55
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#define GET_SYS_PARM_BUF_SIZE 4002
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#if GET_SYS_PARM_BUF_SIZE > RTAS_DATA_BUF_SIZE
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#error "GET_SYS_PARM_BUF_SIZE is larger than RTAS_DATA_BUF_SIZE"
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#endif
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/*
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* Read the lpar name using the RTAS ibm,get-system-parameter call.
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*
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* The name read through this call is updated if changes are made by the end
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* user on the hypervisor side.
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*
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* Some hypervisor (like Qemu) may not provide this value. In that case, a non
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* null value is returned.
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*/
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static int read_rtas_lpar_name(struct seq_file *m)
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{
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int rc, len, token;
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union {
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char raw_buffer[GET_SYS_PARM_BUF_SIZE];
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struct {
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__be16 len;
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char name[GET_SYS_PARM_BUF_SIZE-2];
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};
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} *local_buffer;
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token = rtas_token("ibm,get-system-parameter");
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if (token == RTAS_UNKNOWN_SERVICE)
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return -EINVAL;
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local_buffer = kmalloc(sizeof(*local_buffer), GFP_KERNEL);
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if (!local_buffer)
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return -ENOMEM;
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do {
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spin_lock(&rtas_data_buf_lock);
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memset(rtas_data_buf, 0, sizeof(*local_buffer));
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rc = rtas_call(token, 3, 1, NULL, SPLPAR_LPAR_NAME_TOKEN,
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__pa(rtas_data_buf), sizeof(*local_buffer));
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if (!rc)
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memcpy(local_buffer->raw_buffer, rtas_data_buf,
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sizeof(local_buffer->raw_buffer));
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spin_unlock(&rtas_data_buf_lock);
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} while (rtas_busy_delay(rc));
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if (!rc) {
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/* Force end of string */
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len = min((int) be16_to_cpu(local_buffer->len),
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(int) sizeof(local_buffer->name)-1);
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local_buffer->name[len] = '\0';
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seq_printf(m, "partition_name=%s\n", local_buffer->name);
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} else
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rc = -ENODATA;
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kfree(local_buffer);
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return rc;
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}
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/*
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* Read the LPAR name from the Device Tree.
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*
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* The value read in the DT is not updated if the end-user is touching the LPAR
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* name on the hypervisor side.
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*/
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static int read_dt_lpar_name(struct seq_file *m)
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{
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const char *name;
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if (of_property_read_string(of_root, "ibm,partition-name", &name))
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return -ENOENT;
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seq_printf(m, "partition_name=%s\n", name);
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return 0;
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}
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static void read_lpar_name(struct seq_file *m)
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{
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if (read_rtas_lpar_name(m))
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read_dt_lpar_name(m);
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}
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#define SPLPAR_CHARACTERISTICS_TOKEN 20
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#define SPLPAR_MAXLENGTH 1026*(sizeof(char))
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/*
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* parse_system_parameter_string()
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* Retrieve the potential_processors, max_entitled_capacity and friends
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* through the get-system-parameter rtas call. Replace keyword strings as
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* necessary.
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*/
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static void parse_system_parameter_string(struct seq_file *m)
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{
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int call_status;
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unsigned char *local_buffer = kmalloc(SPLPAR_MAXLENGTH, GFP_KERNEL);
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if (!local_buffer) {
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printk(KERN_ERR "%s %s kmalloc failure at line %d\n",
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__FILE__, __func__, __LINE__);
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return;
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}
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spin_lock(&rtas_data_buf_lock);
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memset(rtas_data_buf, 0, SPLPAR_MAXLENGTH);
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call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1,
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NULL,
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SPLPAR_CHARACTERISTICS_TOKEN,
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__pa(rtas_data_buf),
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RTAS_DATA_BUF_SIZE);
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memcpy(local_buffer, rtas_data_buf, SPLPAR_MAXLENGTH);
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local_buffer[SPLPAR_MAXLENGTH - 1] = '\0';
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spin_unlock(&rtas_data_buf_lock);
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if (call_status != 0) {
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printk(KERN_INFO
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"%s %s Error calling get-system-parameter (0x%x)\n",
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__FILE__, __func__, call_status);
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} else {
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int splpar_strlen;
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int idx, w_idx;
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char *workbuffer = kzalloc(SPLPAR_MAXLENGTH, GFP_KERNEL);
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if (!workbuffer) {
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printk(KERN_ERR "%s %s kmalloc failure at line %d\n",
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__FILE__, __func__, __LINE__);
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kfree(local_buffer);
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return;
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}
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#ifdef LPARCFG_DEBUG
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printk(KERN_INFO "success calling get-system-parameter\n");
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#endif
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splpar_strlen = local_buffer[0] * 256 + local_buffer[1];
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local_buffer += 2; /* step over strlen value */
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w_idx = 0;
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idx = 0;
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while ((*local_buffer) && (idx < splpar_strlen)) {
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workbuffer[w_idx++] = local_buffer[idx++];
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if ((local_buffer[idx] == ',')
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|| (local_buffer[idx] == '\0')) {
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workbuffer[w_idx] = '\0';
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if (w_idx) {
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/* avoid the empty string */
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seq_printf(m, "%s\n", workbuffer);
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}
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memset(workbuffer, 0, SPLPAR_MAXLENGTH);
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idx++; /* skip the comma */
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w_idx = 0;
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} else if (local_buffer[idx] == '=') {
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/* code here to replace workbuffer contents
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with different keyword strings */
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if (0 == strcmp(workbuffer, "MaxEntCap")) {
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strcpy(workbuffer,
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"partition_max_entitled_capacity");
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w_idx = strlen(workbuffer);
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}
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if (0 == strcmp(workbuffer, "MaxPlatProcs")) {
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strcpy(workbuffer,
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"system_potential_processors");
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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;
|
|
int count = 0;
|
|
|
|
for_each_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 += be64_to_cpu(lppaca_of(cpu).cmo_faults);
|
|
cmo_fault_time += be64_to_cpu(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 += be32_to_cpu(lppaca_of(cpu).yield_count);
|
|
dispatch_dispersions +=
|
|
be32_to_cpu(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 (firmware_has_feature(FW_FEATURE_LPAR) &&
|
|
plpar_hcall(H_GET_EM_PARMS, retbuf) == H_SUCCESS)
|
|
seq_printf(m, "power_mode_data=%016lx\n", retbuf[0]);
|
|
}
|
|
|
|
static void maxmem_data(struct seq_file *m)
|
|
{
|
|
unsigned long maxmem = 0;
|
|
|
|
maxmem += (unsigned long)drmem_info->n_lmbs * drmem_info->lmb_size;
|
|
maxmem += hugetlb_total_pages() * PAGE_SIZE;
|
|
|
|
seq_printf(m, "MaxMem=%lu\n", maxmem);
|
|
}
|
|
|
|
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 __be32 *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 = be32_to_cpup(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 */
|
|
read_lpar_name(m);
|
|
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());
|
|
seq_printf(m, "tbr=%ld\n", mftb());
|
|
} 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);
|
|
}
|
|
|
|
show_gpci_data(m);
|
|
|
|
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_shared_proc());
|
|
|
|
#ifdef CONFIG_PPC_64S_HASH_MMU
|
|
if (!radix_enabled())
|
|
seq_printf(m, "slb_size=%d\n", mmu_slb_size);
|
|
#endif
|
|
parse_em_data(m);
|
|
maxmem_data(m);
|
|
|
|
seq_printf(m, "security_flavor=%u\n", pseries_security_flavor);
|
|
|
|
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)
|
|
{
|
|
char kbuf[64];
|
|
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))
|
|
return -EINVAL;
|
|
|
|
if (count > sizeof(kbuf))
|
|
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);
|
|
|
|
if (retval == H_SUCCESS || retval == H_CONSTRAINED) {
|
|
/*
|
|
* The hypervisor assigns VAS resources based
|
|
* on entitled capacity for shared mode.
|
|
* Reconfig VAS windows based on DLPAR CPU events.
|
|
*/
|
|
if (pseries_vas_dlpar_cpu() != 0)
|
|
retval = H_HARDWARE;
|
|
}
|
|
} 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;
|
|
}
|
|
|
|
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 __be32 *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;
|
|
tmp = of_get_property(rootdn, "system-id", NULL);
|
|
if (tmp)
|
|
system_id = tmp;
|
|
lp_index_ptr = of_get_property(rootdn, "ibm,partition-no",
|
|
NULL);
|
|
if (lp_index_ptr)
|
|
lp_index = be32_to_cpup(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);
|
|
|
|
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 proc_ops lparcfg_proc_ops = {
|
|
.proc_read = seq_read,
|
|
.proc_write = lparcfg_write,
|
|
.proc_open = lparcfg_open,
|
|
.proc_release = single_release,
|
|
.proc_lseek = seq_lseek,
|
|
};
|
|
|
|
static int __init lparcfg_init(void)
|
|
{
|
|
umode_t mode = 0444;
|
|
|
|
/* Allow writing if we have FW_FEATURE_SPLPAR */
|
|
if (firmware_has_feature(FW_FEATURE_SPLPAR))
|
|
mode |= 0200;
|
|
|
|
if (!proc_create("powerpc/lparcfg", mode, NULL, &lparcfg_proc_ops)) {
|
|
printk(KERN_ERR "Failed to create powerpc/lparcfg\n");
|
|
return -EIO;
|
|
}
|
|
return 0;
|
|
}
|
|
machine_device_initcall(pseries, lparcfg_init);
|