forked from luck/tmp_suning_uos_patched
96f4a70d8e
Export the cpu configuration topology via sysinfo. Two new lines are introduced: CPU Topology HW: 0 0 0 4 6 4 CPU Topology SW: 0 0 0 0 4 24 The HW line describes the cpu topology nesting levels when the maximum nesting level is used to get the corresponding SYSIB. The SW line describes what Linux is actually using. In this case it supports only two levels (CONFIG_SCHED_BOOK off) and therefore the hardware folded the two lower levels in the SYSIB response block. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
469 lines
13 KiB
C
469 lines
13 KiB
C
/*
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* Copyright IBM Corp. 2001, 2009
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* Author(s): Ulrich Weigand <Ulrich.Weigand@de.ibm.com>,
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* Martin Schwidefsky <schwidefsky@de.ibm.com>,
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*/
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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/module.h>
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#include <linux/slab.h>
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#include <asm/ebcdic.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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/* Sigh, math-emu. Don't ask. */
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#include <asm/sfp-util.h>
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#include <math-emu/soft-fp.h>
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#include <math-emu/single.h>
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static inline int stsi_0(void)
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{
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int rc = stsi(NULL, 0, 0, 0);
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return rc == -ENOSYS ? rc : (((unsigned int) rc) >> 28);
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}
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static int stsi_1_1_1(struct sysinfo_1_1_1 *info, char *page, int len)
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{
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if (stsi(info, 1, 1, 1) == -ENOSYS)
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return len;
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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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len += sprintf(page + len, "Manufacturer: %-16.16s\n",
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info->manufacturer);
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len += sprintf(page + len, "Type: %-4.4s\n",
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info->type);
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if (info->model[0] != '\0')
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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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len += sprintf(page + len,
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"Model: %-16.16s %-16.16s\n",
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info->model_capacity, info->model);
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else
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len += sprintf(page + len, "Model: %-16.16s\n",
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info->model_capacity);
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len += sprintf(page + len, "Sequence Code: %-16.16s\n",
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info->sequence);
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len += sprintf(page + len, "Plant: %-4.4s\n",
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info->plant);
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len += sprintf(page + len, "Model Capacity: %-16.16s %08u\n",
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info->model_capacity, *(u32 *) info->model_cap_rating);
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if (info->model_perm_cap[0] != '\0')
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len += sprintf(page + len,
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"Model Perm. Capacity: %-16.16s %08u\n",
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info->model_perm_cap,
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*(u32 *) info->model_perm_cap_rating);
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if (info->model_temp_cap[0] != '\0')
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len += sprintf(page + len,
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"Model Temp. Capacity: %-16.16s %08u\n",
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info->model_temp_cap,
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*(u32 *) info->model_temp_cap_rating);
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if (info->cai) {
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len += sprintf(page + len,
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"Capacity Adj. Ind.: %d\n",
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info->cai);
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len += sprintf(page + len, "Capacity Ch. Reason: %d\n",
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info->ccr);
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}
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return len;
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}
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static int stsi_15_1_x(struct sysinfo_15_1_x *info, char *page, int len)
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{
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static int max_mnest;
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int i, rc;
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len += sprintf(page + len, "\n");
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if (!MACHINE_HAS_TOPOLOGY)
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return len;
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if (max_mnest) {
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stsi(info, 15, 1, max_mnest);
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} else {
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for (max_mnest = 6; max_mnest > 1; max_mnest--) {
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rc = stsi(info, 15, 1, max_mnest);
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if (rc != -ENOSYS)
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break;
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}
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}
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len += sprintf(page + len, "CPU Topology HW: ");
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for (i = 0; i < TOPOLOGY_NR_MAG; i++)
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len += sprintf(page + len, " %d", info->mag[i]);
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len += sprintf(page + len, "\n");
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store_topology(info);
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len += sprintf(page + len, "CPU Topology SW: ");
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for (i = 0; i < TOPOLOGY_NR_MAG; i++)
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len += sprintf(page + len, " %d", info->mag[i]);
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len += sprintf(page + len, "\n");
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return len;
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}
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static int stsi_1_2_2(struct sysinfo_1_2_2 *info, char *page, int len)
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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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if (stsi(info, 1, 2, 2) == -ENOSYS)
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return len;
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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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len += sprintf(page + len, "CPUs Total: %d\n",
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info->cpus_total);
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len += sprintf(page + len, "CPUs Configured: %d\n",
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info->cpus_configured);
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len += sprintf(page + len, "CPUs Standby: %d\n",
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info->cpus_standby);
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len += sprintf(page + len, "CPUs Reserved: %d\n",
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info->cpus_reserved);
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if (info->format == 1) {
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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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len += sprintf(page + len, "Capability: %u %u\n",
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info->capability, ext->alt_capability);
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for (i = 2; i <= info->cpus_total; i++)
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len += sprintf(page + len,
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"Adjustment %02d-way: %u %u\n",
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i, info->adjustment[i-2],
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ext->alt_adjustment[i-2]);
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} else {
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len += sprintf(page + len, "Capability: %u\n",
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info->capability);
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for (i = 2; i <= info->cpus_total; i++)
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len += sprintf(page + len,
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"Adjustment %02d-way: %u\n",
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i, info->adjustment[i-2]);
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}
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if (info->secondary_capability != 0)
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len += sprintf(page + len, "Secondary Capability: %d\n",
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info->secondary_capability);
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return len;
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}
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static int stsi_2_2_2(struct sysinfo_2_2_2 *info, char *page, int len)
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{
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if (stsi(info, 2, 2, 2) == -ENOSYS)
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return len;
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EBCASC(info->name, sizeof(info->name));
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len += sprintf(page + len, "\n");
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len += sprintf(page + len, "LPAR Number: %d\n",
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info->lpar_number);
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len += sprintf(page + len, "LPAR Characteristics: ");
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if (info->characteristics & LPAR_CHAR_DEDICATED)
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len += sprintf(page + len, "Dedicated ");
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if (info->characteristics & LPAR_CHAR_SHARED)
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len += sprintf(page + len, "Shared ");
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if (info->characteristics & LPAR_CHAR_LIMITED)
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len += sprintf(page + len, "Limited ");
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len += sprintf(page + len, "\n");
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len += sprintf(page + len, "LPAR Name: %-8.8s\n",
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info->name);
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len += sprintf(page + len, "LPAR Adjustment: %d\n",
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info->caf);
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len += sprintf(page + len, "LPAR CPUs Total: %d\n",
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info->cpus_total);
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len += sprintf(page + len, "LPAR CPUs Configured: %d\n",
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info->cpus_configured);
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len += sprintf(page + len, "LPAR CPUs Standby: %d\n",
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info->cpus_standby);
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len += sprintf(page + len, "LPAR CPUs Reserved: %d\n",
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info->cpus_reserved);
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len += sprintf(page + len, "LPAR CPUs Dedicated: %d\n",
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info->cpus_dedicated);
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len += sprintf(page + len, "LPAR CPUs Shared: %d\n",
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info->cpus_shared);
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return len;
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}
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static int stsi_3_2_2(struct sysinfo_3_2_2 *info, char *page, int len)
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{
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int i;
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if (stsi(info, 3, 2, 2) == -ENOSYS)
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return len;
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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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len += sprintf(page + len, "\n");
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len += sprintf(page + len, "VM%02d Name: %-8.8s\n",
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i, info->vm[i].name);
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len += sprintf(page + len, "VM%02d Control Program: %-16.16s\n",
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i, info->vm[i].cpi);
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len += sprintf(page + len, "VM%02d Adjustment: %d\n",
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i, info->vm[i].caf);
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len += sprintf(page + len, "VM%02d CPUs Total: %d\n",
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i, info->vm[i].cpus_total);
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len += sprintf(page + len, "VM%02d CPUs Configured: %d\n",
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i, info->vm[i].cpus_configured);
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len += sprintf(page + len, "VM%02d CPUs Standby: %d\n",
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i, info->vm[i].cpus_standby);
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len += sprintf(page + len, "VM%02d CPUs Reserved: %d\n",
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i, info->vm[i].cpus_reserved);
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}
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return len;
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}
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static int proc_read_sysinfo(char *page, char **start,
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off_t off, int count,
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int *eof, void *data)
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{
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unsigned long info = get_zeroed_page(GFP_KERNEL);
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int level, len;
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if (!info)
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return 0;
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len = 0;
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level = stsi_0();
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if (level >= 1)
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len = stsi_1_1_1((struct sysinfo_1_1_1 *) info, page, len);
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if (level >= 1)
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len = stsi_15_1_x((struct sysinfo_15_1_x *) info, page, len);
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if (level >= 1)
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len = stsi_1_2_2((struct sysinfo_1_2_2 *) info, page, len);
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if (level >= 2)
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len = stsi_2_2_2((struct sysinfo_2_2_2 *) info, page, len);
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if (level >= 3)
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len = stsi_3_2_2((struct sysinfo_3_2_2 *) info, page, len);
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free_page(info);
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return len;
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}
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static __init int create_proc_sysinfo(void)
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{
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create_proc_read_entry("sysinfo", 0444, NULL,
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proc_read_sysinfo, NULL);
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return 0;
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}
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device_initcall(create_proc_sysinfo);
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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 int service_level_open(struct inode *inode, struct file *file)
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{
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return seq_open(file, &service_level_seq_ops);
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}
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static const struct file_operations service_level_ops = {
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.open = service_level_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release
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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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static __init int create_proc_service_level(void)
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{
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proc_create("service_levels", 0, NULL, &service_level_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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* Bogomips calculation based on cpu capability.
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*/
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int get_cpu_capability(unsigned int *capability)
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{
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struct sysinfo_1_2_2 *info;
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int rc;
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info = (void *) get_zeroed_page(GFP_KERNEL);
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if (!info)
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return -ENOMEM;
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rc = stsi(info, 1, 2, 2);
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if (rc == -ENOSYS)
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goto out;
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rc = 0;
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*capability = info->capability;
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out:
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free_page((unsigned long) info);
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return rc;
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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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const unsigned int fmil = 0x4b189680; /* 1e7 as 32-bit float. */
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FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SR);
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FP_DECL_EX;
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unsigned int capability;
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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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if (stsi(info, 1, 2, 2) != -ENOSYS) {
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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 .. math-emu here we come :-)
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*/
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FP_UNPACK_SP(SA, &fmil);
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if ((info->capability >> 23) == 0)
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FP_FROM_INT_S(SB, info->capability, 32, int);
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else
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FP_UNPACK_SP(SB, &info->capability);
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FP_DIV_S(SR, SA, SB);
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FP_TO_INT_S(capability, SR, 32, 0);
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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 __cpuinit 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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