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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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5260b0f50c
With z14, the store system information instruction provides an licensed internal code identifier. Display it in /proc/sysinfo. For more information, see the z/Architecture Principles of Operation. (SA22-7832-11). Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
589 lines
16 KiB
C
589 lines
16 KiB
C
// 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 <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/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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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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* 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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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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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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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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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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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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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 sysinfo_open(struct inode *inode, struct file *file)
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{
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return single_open(file, sysinfo_show, NULL);
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}
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static const struct file_operations sysinfo_fops = {
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.open = sysinfo_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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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("sysinfo", 0444, NULL, &sysinfo_fops);
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return 0;
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}
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device_initcall(sysinfo_create_proc);
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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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* 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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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) == 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
|
|
* is a 32 bit unsigned integer in the range 0 .. 2^23.
|
|
* If the first 9 bits are != 0 then it is a 32 bit float.
|
|
* In addition a lower value indicates a proportionally
|
|
* higher cpu capacity. Bogomips are the other way round.
|
|
* To get to a halfway suitable number we divide 1e7
|
|
* by the cpu capability number. Yes, that means a floating
|
|
* point division ..
|
|
*/
|
|
kernel_fpu_begin(&fpu, KERNEL_FPR);
|
|
asm volatile(
|
|
" sfpc %3\n"
|
|
" l %0,%1\n"
|
|
" tmlh %0,0xff80\n"
|
|
" jnz 0f\n"
|
|
" cefbr %%f2,%0\n"
|
|
" j 1f\n"
|
|
"0: le %%f2,%1\n"
|
|
"1: cefbr %%f0,%2\n"
|
|
" debr %%f0,%%f2\n"
|
|
" cgebr %0,5,%%f0\n"
|
|
: "=&d" (capability)
|
|
: "Q" (info->capability), "d" (10000000), "d" (0)
|
|
: "cc"
|
|
);
|
|
kernel_fpu_end(&fpu, KERNEL_FPR);
|
|
} else
|
|
/*
|
|
* Really old machine without stsi block for basic
|
|
* cpu information. Report 42.0 bogomips.
|
|
*/
|
|
capability = 42;
|
|
loops_per_jiffy = capability * (500000/HZ);
|
|
free_page((unsigned long) info);
|
|
}
|
|
|
|
/*
|
|
* calibrate the delay loop
|
|
*/
|
|
void calibrate_delay(void)
|
|
{
|
|
s390_adjust_jiffies();
|
|
/* Print the good old Bogomips line .. */
|
|
printk(KERN_DEBUG "Calibrating delay loop (skipped)... "
|
|
"%lu.%02lu BogoMIPS preset\n", loops_per_jiffy/(500000/HZ),
|
|
(loops_per_jiffy/(5000/HZ)) % 100);
|
|
}
|
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
|
|
#define STSI_FILE(fc, s1, s2) \
|
|
static int stsi_open_##fc##_##s1##_##s2(struct inode *inode, struct file *file)\
|
|
{ \
|
|
file->private_data = (void *) get_zeroed_page(GFP_KERNEL); \
|
|
if (!file->private_data) \
|
|
return -ENOMEM; \
|
|
if (stsi(file->private_data, fc, s1, s2)) { \
|
|
free_page((unsigned long)file->private_data); \
|
|
file->private_data = NULL; \
|
|
return -EACCES; \
|
|
} \
|
|
return nonseekable_open(inode, file); \
|
|
} \
|
|
\
|
|
static const struct file_operations stsi_##fc##_##s1##_##s2##_fs_ops = { \
|
|
.open = stsi_open_##fc##_##s1##_##s2, \
|
|
.release = stsi_release, \
|
|
.read = stsi_read, \
|
|
.llseek = no_llseek, \
|
|
};
|
|
|
|
static int stsi_release(struct inode *inode, struct file *file)
|
|
{
|
|
free_page((unsigned long)file->private_data);
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t stsi_read(struct file *file, char __user *buf, size_t size, loff_t *ppos)
|
|
{
|
|
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);
|
|
if (IS_ERR_OR_NULL(stsi_root))
|
|
return 0;
|
|
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 */
|