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566 lines
16 KiB
566 lines
16 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Copyright IBM Corp. 2001, 2009 |
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* Author(s): Ulrich Weigand <[email protected]>, |
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* Martin Schwidefsky <[email protected]>, |
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*/ |
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|
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#include <linux/debugfs.h> |
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#include <linux/kernel.h> |
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#include <linux/mm.h> |
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#include <linux/proc_fs.h> |
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#include <linux/seq_file.h> |
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#include <linux/init.h> |
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#include <linux/delay.h> |
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#include <linux/export.h> |
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#include <linux/slab.h> |
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#include <asm/ebcdic.h> |
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#include <asm/debug.h> |
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#include <asm/sysinfo.h> |
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#include <asm/cpcmd.h> |
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#include <asm/topology.h> |
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#include <asm/fpu/api.h> |
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int topology_max_mnest; |
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static inline int __stsi(void *sysinfo, int fc, int sel1, int sel2, int *lvl) |
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{ |
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register int r0 asm("0") = (fc << 28) | sel1; |
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register int r1 asm("1") = sel2; |
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int rc = 0; |
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|
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asm volatile( |
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" stsi 0(%3)\n" |
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"0: jz 2f\n" |
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"1: lhi %1,%4\n" |
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"2:\n" |
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EX_TABLE(0b, 1b) |
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: "+d" (r0), "+d" (rc) |
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: "d" (r1), "a" (sysinfo), "K" (-EOPNOTSUPP) |
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: "cc", "memory"); |
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*lvl = ((unsigned int) r0) >> 28; |
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return rc; |
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} |
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|
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/* |
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* stsi - store system information |
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* |
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* Returns the current configuration level if function code 0 was specified. |
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* Otherwise returns 0 on success or a negative value on error. |
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*/ |
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int stsi(void *sysinfo, int fc, int sel1, int sel2) |
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{ |
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int lvl, rc; |
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rc = __stsi(sysinfo, fc, sel1, sel2, &lvl); |
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if (rc) |
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return rc; |
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return fc ? 0 : lvl; |
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} |
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EXPORT_SYMBOL(stsi); |
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|
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#ifdef CONFIG_PROC_FS |
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|
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static bool convert_ext_name(unsigned char encoding, char *name, size_t len) |
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{ |
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switch (encoding) { |
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case 1: /* EBCDIC */ |
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EBCASC(name, len); |
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break; |
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case 2: /* UTF-8 */ |
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break; |
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default: |
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return false; |
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} |
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return true; |
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} |
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static void stsi_1_1_1(struct seq_file *m, struct sysinfo_1_1_1 *info) |
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{ |
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int i; |
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|
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if (stsi(info, 1, 1, 1)) |
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return; |
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EBCASC(info->manufacturer, sizeof(info->manufacturer)); |
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EBCASC(info->type, sizeof(info->type)); |
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EBCASC(info->model, sizeof(info->model)); |
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EBCASC(info->sequence, sizeof(info->sequence)); |
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EBCASC(info->plant, sizeof(info->plant)); |
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EBCASC(info->model_capacity, sizeof(info->model_capacity)); |
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EBCASC(info->model_perm_cap, sizeof(info->model_perm_cap)); |
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EBCASC(info->model_temp_cap, sizeof(info->model_temp_cap)); |
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seq_printf(m, "Manufacturer: %-16.16s\n", info->manufacturer); |
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seq_printf(m, "Type: %-4.4s\n", info->type); |
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if (info->lic) |
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seq_printf(m, "LIC Identifier: %016lx\n", info->lic); |
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/* |
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* Sigh: the model field has been renamed with System z9 |
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* to model_capacity and a new model field has been added |
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* after the plant field. To avoid confusing older programs |
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* the "Model:" prints "model_capacity model" or just |
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* "model_capacity" if the model string is empty . |
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*/ |
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seq_printf(m, "Model: %-16.16s", info->model_capacity); |
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if (info->model[0] != '\0') |
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seq_printf(m, " %-16.16s", info->model); |
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seq_putc(m, '\n'); |
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seq_printf(m, "Sequence Code: %-16.16s\n", info->sequence); |
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seq_printf(m, "Plant: %-4.4s\n", info->plant); |
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seq_printf(m, "Model Capacity: %-16.16s %08u\n", |
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info->model_capacity, info->model_cap_rating); |
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if (info->model_perm_cap_rating) |
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seq_printf(m, "Model Perm. Capacity: %-16.16s %08u\n", |
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info->model_perm_cap, |
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info->model_perm_cap_rating); |
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if (info->model_temp_cap_rating) |
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seq_printf(m, "Model Temp. Capacity: %-16.16s %08u\n", |
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info->model_temp_cap, |
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info->model_temp_cap_rating); |
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if (info->ncr) |
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seq_printf(m, "Nominal Cap. Rating: %08u\n", info->ncr); |
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if (info->npr) |
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seq_printf(m, "Nominal Perm. Rating: %08u\n", info->npr); |
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if (info->ntr) |
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seq_printf(m, "Nominal Temp. Rating: %08u\n", info->ntr); |
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if (info->cai) { |
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seq_printf(m, "Capacity Adj. Ind.: %d\n", info->cai); |
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seq_printf(m, "Capacity Ch. Reason: %d\n", info->ccr); |
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seq_printf(m, "Capacity Transient: %d\n", info->t); |
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} |
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if (info->p) { |
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for (i = 1; i <= ARRAY_SIZE(info->typepct); i++) { |
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seq_printf(m, "Type %d Percentage: %d\n", |
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i, info->typepct[i - 1]); |
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} |
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} |
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} |
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|
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static void stsi_15_1_x(struct seq_file *m, struct sysinfo_15_1_x *info) |
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{ |
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int i; |
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|
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seq_putc(m, '\n'); |
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if (!MACHINE_HAS_TOPOLOGY) |
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return; |
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if (stsi(info, 15, 1, topology_max_mnest)) |
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return; |
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seq_printf(m, "CPU Topology HW: "); |
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for (i = 0; i < TOPOLOGY_NR_MAG; i++) |
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seq_printf(m, " %d", info->mag[i]); |
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seq_putc(m, '\n'); |
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#ifdef CONFIG_SCHED_TOPOLOGY |
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store_topology(info); |
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seq_printf(m, "CPU Topology SW: "); |
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for (i = 0; i < TOPOLOGY_NR_MAG; i++) |
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seq_printf(m, " %d", info->mag[i]); |
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seq_putc(m, '\n'); |
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#endif |
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} |
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|
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static void stsi_1_2_2(struct seq_file *m, struct sysinfo_1_2_2 *info) |
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{ |
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struct sysinfo_1_2_2_extension *ext; |
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int i; |
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|
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if (stsi(info, 1, 2, 2)) |
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return; |
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ext = (struct sysinfo_1_2_2_extension *) |
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((unsigned long) info + info->acc_offset); |
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seq_printf(m, "CPUs Total: %d\n", info->cpus_total); |
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seq_printf(m, "CPUs Configured: %d\n", info->cpus_configured); |
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seq_printf(m, "CPUs Standby: %d\n", info->cpus_standby); |
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seq_printf(m, "CPUs Reserved: %d\n", info->cpus_reserved); |
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if (info->mt_installed) { |
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seq_printf(m, "CPUs G-MTID: %d\n", info->mt_gtid); |
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seq_printf(m, "CPUs S-MTID: %d\n", info->mt_stid); |
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} |
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/* |
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* Sigh 2. According to the specification the alternate |
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* capability field is a 32 bit floating point number |
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* if the higher order 8 bits are not zero. Printing |
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* a floating point number in the kernel is a no-no, |
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* always print the number as 32 bit unsigned integer. |
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* The user-space needs to know about the strange |
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* encoding of the alternate cpu capability. |
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*/ |
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seq_printf(m, "Capability: %u", info->capability); |
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if (info->format == 1) |
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seq_printf(m, " %u", ext->alt_capability); |
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seq_putc(m, '\n'); |
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if (info->nominal_cap) |
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seq_printf(m, "Nominal Capability: %d\n", info->nominal_cap); |
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if (info->secondary_cap) |
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seq_printf(m, "Secondary Capability: %d\n", info->secondary_cap); |
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for (i = 2; i <= info->cpus_total; i++) { |
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seq_printf(m, "Adjustment %02d-way: %u", |
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i, info->adjustment[i-2]); |
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if (info->format == 1) |
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seq_printf(m, " %u", ext->alt_adjustment[i-2]); |
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seq_putc(m, '\n'); |
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} |
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} |
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static void stsi_2_2_2(struct seq_file *m, struct sysinfo_2_2_2 *info) |
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{ |
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if (stsi(info, 2, 2, 2)) |
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return; |
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EBCASC(info->name, sizeof(info->name)); |
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seq_putc(m, '\n'); |
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seq_printf(m, "LPAR Number: %d\n", info->lpar_number); |
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seq_printf(m, "LPAR Characteristics: "); |
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if (info->characteristics & LPAR_CHAR_DEDICATED) |
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seq_printf(m, "Dedicated "); |
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if (info->characteristics & LPAR_CHAR_SHARED) |
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seq_printf(m, "Shared "); |
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if (info->characteristics & LPAR_CHAR_LIMITED) |
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seq_printf(m, "Limited "); |
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seq_putc(m, '\n'); |
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seq_printf(m, "LPAR Name: %-8.8s\n", info->name); |
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seq_printf(m, "LPAR Adjustment: %d\n", info->caf); |
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seq_printf(m, "LPAR CPUs Total: %d\n", info->cpus_total); |
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seq_printf(m, "LPAR CPUs Configured: %d\n", info->cpus_configured); |
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seq_printf(m, "LPAR CPUs Standby: %d\n", info->cpus_standby); |
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seq_printf(m, "LPAR CPUs Reserved: %d\n", info->cpus_reserved); |
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seq_printf(m, "LPAR CPUs Dedicated: %d\n", info->cpus_dedicated); |
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seq_printf(m, "LPAR CPUs Shared: %d\n", info->cpus_shared); |
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if (info->mt_installed) { |
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seq_printf(m, "LPAR CPUs G-MTID: %d\n", info->mt_gtid); |
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seq_printf(m, "LPAR CPUs S-MTID: %d\n", info->mt_stid); |
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seq_printf(m, "LPAR CPUs PS-MTID: %d\n", info->mt_psmtid); |
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} |
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if (convert_ext_name(info->vsne, info->ext_name, sizeof(info->ext_name))) { |
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seq_printf(m, "LPAR Extended Name: %-.256s\n", info->ext_name); |
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seq_printf(m, "LPAR UUID: %pUb\n", &info->uuid); |
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} |
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} |
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static void print_ext_name(struct seq_file *m, int lvl, |
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struct sysinfo_3_2_2 *info) |
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{ |
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size_t len = sizeof(info->ext_names[lvl]); |
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if (!convert_ext_name(info->vm[lvl].evmne, info->ext_names[lvl], len)) |
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return; |
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seq_printf(m, "VM%02d Extended Name: %-.256s\n", lvl, |
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info->ext_names[lvl]); |
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} |
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static void print_uuid(struct seq_file *m, int i, struct sysinfo_3_2_2 *info) |
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{ |
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if (uuid_is_null(&info->vm[i].uuid)) |
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return; |
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seq_printf(m, "VM%02d UUID: %pUb\n", i, &info->vm[i].uuid); |
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} |
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static void stsi_3_2_2(struct seq_file *m, struct sysinfo_3_2_2 *info) |
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{ |
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int i; |
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if (stsi(info, 3, 2, 2)) |
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return; |
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for (i = 0; i < info->count; i++) { |
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EBCASC(info->vm[i].name, sizeof(info->vm[i].name)); |
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EBCASC(info->vm[i].cpi, sizeof(info->vm[i].cpi)); |
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seq_putc(m, '\n'); |
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seq_printf(m, "VM%02d Name: %-8.8s\n", i, info->vm[i].name); |
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seq_printf(m, "VM%02d Control Program: %-16.16s\n", i, info->vm[i].cpi); |
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seq_printf(m, "VM%02d Adjustment: %d\n", i, info->vm[i].caf); |
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seq_printf(m, "VM%02d CPUs Total: %d\n", i, info->vm[i].cpus_total); |
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seq_printf(m, "VM%02d CPUs Configured: %d\n", i, info->vm[i].cpus_configured); |
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seq_printf(m, "VM%02d CPUs Standby: %d\n", i, info->vm[i].cpus_standby); |
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seq_printf(m, "VM%02d CPUs Reserved: %d\n", i, info->vm[i].cpus_reserved); |
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print_ext_name(m, i, info); |
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print_uuid(m, i, info); |
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} |
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} |
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static int sysinfo_show(struct seq_file *m, void *v) |
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{ |
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void *info = (void *)get_zeroed_page(GFP_KERNEL); |
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int level; |
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if (!info) |
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return 0; |
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level = stsi(NULL, 0, 0, 0); |
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if (level >= 1) |
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stsi_1_1_1(m, info); |
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if (level >= 1) |
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stsi_15_1_x(m, info); |
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if (level >= 1) |
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stsi_1_2_2(m, info); |
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if (level >= 2) |
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stsi_2_2_2(m, info); |
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if (level >= 3) |
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stsi_3_2_2(m, info); |
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free_page((unsigned long)info); |
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return 0; |
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} |
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static int __init sysinfo_create_proc(void) |
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{ |
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proc_create_single("sysinfo", 0444, NULL, sysinfo_show); |
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return 0; |
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} |
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device_initcall(sysinfo_create_proc); |
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#endif /* CONFIG_PROC_FS */ |
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/* |
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* Service levels interface. |
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*/ |
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static DECLARE_RWSEM(service_level_sem); |
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static LIST_HEAD(service_level_list); |
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int register_service_level(struct service_level *slr) |
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{ |
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struct service_level *ptr; |
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down_write(&service_level_sem); |
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list_for_each_entry(ptr, &service_level_list, list) |
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if (ptr == slr) { |
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up_write(&service_level_sem); |
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return -EEXIST; |
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} |
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list_add_tail(&slr->list, &service_level_list); |
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up_write(&service_level_sem); |
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return 0; |
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} |
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EXPORT_SYMBOL(register_service_level); |
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int unregister_service_level(struct service_level *slr) |
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{ |
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struct service_level *ptr, *next; |
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int rc = -ENOENT; |
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down_write(&service_level_sem); |
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list_for_each_entry_safe(ptr, next, &service_level_list, list) { |
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if (ptr != slr) |
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continue; |
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list_del(&ptr->list); |
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rc = 0; |
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break; |
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} |
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up_write(&service_level_sem); |
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return rc; |
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} |
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EXPORT_SYMBOL(unregister_service_level); |
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static void *service_level_start(struct seq_file *m, loff_t *pos) |
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{ |
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down_read(&service_level_sem); |
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return seq_list_start(&service_level_list, *pos); |
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} |
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static void *service_level_next(struct seq_file *m, void *p, loff_t *pos) |
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{ |
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return seq_list_next(p, &service_level_list, pos); |
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} |
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static void service_level_stop(struct seq_file *m, void *p) |
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{ |
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up_read(&service_level_sem); |
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} |
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static int service_level_show(struct seq_file *m, void *p) |
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{ |
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struct service_level *slr; |
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slr = list_entry(p, struct service_level, list); |
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slr->seq_print(m, slr); |
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return 0; |
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} |
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static const struct seq_operations service_level_seq_ops = { |
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.start = service_level_start, |
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.next = service_level_next, |
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.stop = service_level_stop, |
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.show = service_level_show |
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}; |
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static void service_level_vm_print(struct seq_file *m, |
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struct service_level *slr) |
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{ |
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char *query_buffer, *str; |
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query_buffer = kmalloc(1024, GFP_KERNEL | GFP_DMA); |
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if (!query_buffer) |
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return; |
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cpcmd("QUERY CPLEVEL", query_buffer, 1024, NULL); |
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str = strchr(query_buffer, '\n'); |
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if (str) |
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*str = 0; |
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seq_printf(m, "VM: %s\n", query_buffer); |
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kfree(query_buffer); |
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} |
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static struct service_level service_level_vm = { |
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.seq_print = service_level_vm_print |
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}; |
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|
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static __init int create_proc_service_level(void) |
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{ |
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proc_create_seq("service_levels", 0, NULL, &service_level_seq_ops); |
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if (MACHINE_IS_VM) |
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register_service_level(&service_level_vm); |
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return 0; |
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} |
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subsys_initcall(create_proc_service_level); |
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|
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/* |
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* CPU capability might have changed. Therefore recalculate loops_per_jiffy. |
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*/ |
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void s390_adjust_jiffies(void) |
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{ |
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struct sysinfo_1_2_2 *info; |
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unsigned long capability; |
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struct kernel_fpu fpu; |
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|
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info = (void *) get_zeroed_page(GFP_KERNEL); |
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if (!info) |
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return; |
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|
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if (stsi(info, 1, 2, 2) == 0) { |
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/* |
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* Major sigh. The cpu capability encoding is "special". |
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* If the first 9 bits of info->capability are 0 then it |
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* is a 32 bit unsigned integer in the range 0 .. 2^23. |
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* If the first 9 bits are != 0 then it is a 32 bit float. |
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* In addition a lower value indicates a proportionally |
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* higher cpu capacity. Bogomips are the other way round. |
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* To get to a halfway suitable number we divide 1e7 |
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* by the cpu capability number. Yes, that means a floating |
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* point division .. |
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*/ |
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kernel_fpu_begin(&fpu, KERNEL_FPR); |
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asm volatile( |
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" sfpc %3\n" |
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" l %0,%1\n" |
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" tmlh %0,0xff80\n" |
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" jnz 0f\n" |
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" cefbr %%f2,%0\n" |
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" j 1f\n" |
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"0: le %%f2,%1\n" |
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"1: cefbr %%f0,%2\n" |
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" debr %%f0,%%f2\n" |
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" cgebr %0,5,%%f0\n" |
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: "=&d" (capability) |
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: "Q" (info->capability), "d" (10000000), "d" (0) |
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: "cc" |
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); |
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kernel_fpu_end(&fpu, KERNEL_FPR); |
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} else |
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/* |
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* Really old machine without stsi block for basic |
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* cpu information. Report 42.0 bogomips. |
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*/ |
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capability = 42; |
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loops_per_jiffy = capability * (500000/HZ); |
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free_page((unsigned long) info); |
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} |
|
|
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/* |
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* calibrate the delay loop |
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*/ |
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void calibrate_delay(void) |
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{ |
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s390_adjust_jiffies(); |
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/* Print the good old Bogomips line .. */ |
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printk(KERN_DEBUG "Calibrating delay loop (skipped)... " |
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"%lu.%02lu BogoMIPS preset\n", loops_per_jiffy/(500000/HZ), |
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(loops_per_jiffy/(5000/HZ)) % 100); |
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} |
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|
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#ifdef CONFIG_DEBUG_FS |
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|
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#define STSI_FILE(fc, s1, s2) \ |
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static int stsi_open_##fc##_##s1##_##s2(struct inode *inode, struct file *file)\ |
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{ \ |
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file->private_data = (void *) get_zeroed_page(GFP_KERNEL); \ |
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if (!file->private_data) \ |
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return -ENOMEM; \ |
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if (stsi(file->private_data, fc, s1, s2)) { \ |
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free_page((unsigned long)file->private_data); \ |
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file->private_data = NULL; \ |
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return -EACCES; \ |
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} \ |
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return nonseekable_open(inode, file); \ |
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} \ |
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\ |
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static const struct file_operations stsi_##fc##_##s1##_##s2##_fs_ops = { \ |
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.open = stsi_open_##fc##_##s1##_##s2, \ |
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.release = stsi_release, \ |
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.read = stsi_read, \ |
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.llseek = no_llseek, \ |
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}; |
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|
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static int stsi_release(struct inode *inode, struct file *file) |
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{ |
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free_page((unsigned long)file->private_data); |
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return 0; |
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} |
|
|
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static ssize_t stsi_read(struct file *file, char __user *buf, size_t size, loff_t *ppos) |
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{ |
|
return simple_read_from_buffer(buf, size, ppos, file->private_data, PAGE_SIZE); |
|
} |
|
|
|
STSI_FILE( 1, 1, 1); |
|
STSI_FILE( 1, 2, 1); |
|
STSI_FILE( 1, 2, 2); |
|
STSI_FILE( 2, 2, 1); |
|
STSI_FILE( 2, 2, 2); |
|
STSI_FILE( 3, 2, 2); |
|
STSI_FILE(15, 1, 2); |
|
STSI_FILE(15, 1, 3); |
|
STSI_FILE(15, 1, 4); |
|
STSI_FILE(15, 1, 5); |
|
STSI_FILE(15, 1, 6); |
|
|
|
struct stsi_file { |
|
const struct file_operations *fops; |
|
char *name; |
|
}; |
|
|
|
static struct stsi_file stsi_file[] __initdata = { |
|
{.fops = &stsi_1_1_1_fs_ops, .name = "1_1_1"}, |
|
{.fops = &stsi_1_2_1_fs_ops, .name = "1_2_1"}, |
|
{.fops = &stsi_1_2_2_fs_ops, .name = "1_2_2"}, |
|
{.fops = &stsi_2_2_1_fs_ops, .name = "2_2_1"}, |
|
{.fops = &stsi_2_2_2_fs_ops, .name = "2_2_2"}, |
|
{.fops = &stsi_3_2_2_fs_ops, .name = "3_2_2"}, |
|
{.fops = &stsi_15_1_2_fs_ops, .name = "15_1_2"}, |
|
{.fops = &stsi_15_1_3_fs_ops, .name = "15_1_3"}, |
|
{.fops = &stsi_15_1_4_fs_ops, .name = "15_1_4"}, |
|
{.fops = &stsi_15_1_5_fs_ops, .name = "15_1_5"}, |
|
{.fops = &stsi_15_1_6_fs_ops, .name = "15_1_6"}, |
|
}; |
|
|
|
static u8 stsi_0_0_0; |
|
|
|
static __init int stsi_init_debugfs(void) |
|
{ |
|
struct dentry *stsi_root; |
|
struct stsi_file *sf; |
|
int lvl, i; |
|
|
|
stsi_root = debugfs_create_dir("stsi", arch_debugfs_dir); |
|
lvl = stsi(NULL, 0, 0, 0); |
|
if (lvl > 0) |
|
stsi_0_0_0 = lvl; |
|
debugfs_create_u8("0_0_0", 0400, stsi_root, &stsi_0_0_0); |
|
for (i = 0; i < ARRAY_SIZE(stsi_file); i++) { |
|
sf = &stsi_file[i]; |
|
debugfs_create_file(sf->name, 0400, stsi_root, NULL, sf->fops); |
|
} |
|
if (IS_ENABLED(CONFIG_SCHED_TOPOLOGY) && MACHINE_HAS_TOPOLOGY) { |
|
char link_to[10]; |
|
|
|
sprintf(link_to, "15_1_%d", topology_mnest_limit()); |
|
debugfs_create_symlink("topology", stsi_root, link_to); |
|
} |
|
return 0; |
|
} |
|
device_initcall(stsi_init_debugfs); |
|
|
|
#endif /* CONFIG_DEBUG_FS */
|
|
|