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![Heiko Carstens](/assets/img/avatar_default.png)
Follow arm64 and riscv and move the EX_TABLE define to asm-extable.h which is a lot less generic than the current linkage.h. Also make sure that all files which contain EX_TABLE usages actually include the new header file. This should make sure that the files always compile and there won't be any random compile breakage due to other header file dependencies. Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
570 lines
16 KiB
C
570 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/asm-extable.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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int r0 = (fc << 28) | sel1;
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int rc = 0;
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asm volatile(
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" lr 0,%[r0]\n"
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" lr 1,%[r1]\n"
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" stsi 0(%[sysinfo])\n"
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"0: jz 2f\n"
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"1: lhi %[rc],%[retval]\n"
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"2: lr %[r0],0\n"
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EX_TABLE(0b, 1b)
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: [r0] "+d" (r0), [rc] "+d" (rc)
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: [r1] "d" (sel2),
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[sysinfo] "a" (sysinfo),
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[retval] "K" (-EOPNOTSUPP)
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: "cc", "0", "1", "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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#ifdef CONFIG_PROC_FS
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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 __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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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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* 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
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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(
|
|
" 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);
|
|
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 */
|