247 lines
6.5 KiB
C
247 lines
6.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Implementation of s390 diagnose codes
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*
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* Copyright IBM Corp. 2007
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* Author(s): Michael Holzheu <holzheu@de.ibm.com>
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*/
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#include <linux/export.h>
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#include <linux/init.h>
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#include <linux/cpu.h>
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#include <linux/seq_file.h>
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#include <linux/debugfs.h>
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#include <asm/asm-extable.h>
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#include <asm/diag.h>
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#include <asm/trace/diag.h>
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#include <asm/sections.h>
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#include "entry.h"
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struct diag_stat {
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unsigned int counter[NR_DIAG_STAT];
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};
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static DEFINE_PER_CPU(struct diag_stat, diag_stat);
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struct diag_desc {
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int code;
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char *name;
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};
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static const struct diag_desc diag_map[NR_DIAG_STAT] = {
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[DIAG_STAT_X008] = { .code = 0x008, .name = "Console Function" },
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[DIAG_STAT_X00C] = { .code = 0x00c, .name = "Pseudo Timer" },
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[DIAG_STAT_X010] = { .code = 0x010, .name = "Release Pages" },
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[DIAG_STAT_X014] = { .code = 0x014, .name = "Spool File Services" },
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[DIAG_STAT_X044] = { .code = 0x044, .name = "Voluntary Timeslice End" },
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[DIAG_STAT_X064] = { .code = 0x064, .name = "NSS Manipulation" },
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[DIAG_STAT_X08C] = { .code = 0x08c, .name = "Access 3270 Display Device Information" },
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[DIAG_STAT_X09C] = { .code = 0x09c, .name = "Relinquish Timeslice" },
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[DIAG_STAT_X0DC] = { .code = 0x0dc, .name = "Appldata Control" },
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[DIAG_STAT_X204] = { .code = 0x204, .name = "Logical-CPU Utilization" },
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[DIAG_STAT_X210] = { .code = 0x210, .name = "Device Information" },
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[DIAG_STAT_X224] = { .code = 0x224, .name = "EBCDIC-Name Table" },
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[DIAG_STAT_X250] = { .code = 0x250, .name = "Block I/O" },
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[DIAG_STAT_X258] = { .code = 0x258, .name = "Page-Reference Services" },
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[DIAG_STAT_X26C] = { .code = 0x26c, .name = "Certain System Information" },
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[DIAG_STAT_X288] = { .code = 0x288, .name = "Time Bomb" },
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[DIAG_STAT_X2C4] = { .code = 0x2c4, .name = "FTP Services" },
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[DIAG_STAT_X2FC] = { .code = 0x2fc, .name = "Guest Performance Data" },
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[DIAG_STAT_X304] = { .code = 0x304, .name = "Partition-Resource Service" },
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[DIAG_STAT_X308] = { .code = 0x308, .name = "List-Directed IPL" },
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[DIAG_STAT_X318] = { .code = 0x318, .name = "CP Name and Version Codes" },
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[DIAG_STAT_X500] = { .code = 0x500, .name = "Virtio Service" },
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};
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struct diag_ops __amode31_ref diag_amode31_ops = {
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.diag210 = _diag210_amode31,
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.diag26c = _diag26c_amode31,
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.diag14 = _diag14_amode31,
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.diag0c = _diag0c_amode31,
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.diag8c = _diag8c_amode31,
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.diag308_reset = _diag308_reset_amode31
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};
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static struct diag210 _diag210_tmp_amode31 __section(".amode31.data");
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struct diag210 __amode31_ref *__diag210_tmp_amode31 = &_diag210_tmp_amode31;
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static struct diag8c _diag8c_tmp_amode31 __section(".amode31.data");
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static struct diag8c __amode31_ref *__diag8c_tmp_amode31 = &_diag8c_tmp_amode31;
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static int show_diag_stat(struct seq_file *m, void *v)
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{
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struct diag_stat *stat;
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unsigned long n = (unsigned long) v - 1;
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int cpu, prec, tmp;
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cpus_read_lock();
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if (n == 0) {
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seq_puts(m, " ");
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for_each_online_cpu(cpu) {
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prec = 10;
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for (tmp = 10; cpu >= tmp; tmp *= 10)
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prec--;
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seq_printf(m, "%*s%d", prec, "CPU", cpu);
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}
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seq_putc(m, '\n');
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} else if (n <= NR_DIAG_STAT) {
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seq_printf(m, "diag %03x:", diag_map[n-1].code);
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for_each_online_cpu(cpu) {
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stat = &per_cpu(diag_stat, cpu);
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seq_printf(m, " %10u", stat->counter[n-1]);
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}
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seq_printf(m, " %s\n", diag_map[n-1].name);
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}
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cpus_read_unlock();
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return 0;
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}
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static void *show_diag_stat_start(struct seq_file *m, loff_t *pos)
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{
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return *pos <= NR_DIAG_STAT ? (void *)((unsigned long) *pos + 1) : NULL;
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}
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static void *show_diag_stat_next(struct seq_file *m, void *v, loff_t *pos)
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{
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++*pos;
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return show_diag_stat_start(m, pos);
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}
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static void show_diag_stat_stop(struct seq_file *m, void *v)
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{
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}
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static const struct seq_operations show_diag_stat_sops = {
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.start = show_diag_stat_start,
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.next = show_diag_stat_next,
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.stop = show_diag_stat_stop,
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.show = show_diag_stat,
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};
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DEFINE_SEQ_ATTRIBUTE(show_diag_stat);
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static int __init show_diag_stat_init(void)
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{
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debugfs_create_file("diag_stat", 0400, NULL, NULL,
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&show_diag_stat_fops);
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return 0;
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}
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device_initcall(show_diag_stat_init);
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void diag_stat_inc(enum diag_stat_enum nr)
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{
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this_cpu_inc(diag_stat.counter[nr]);
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trace_s390_diagnose(diag_map[nr].code);
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}
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EXPORT_SYMBOL(diag_stat_inc);
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void notrace diag_stat_inc_norecursion(enum diag_stat_enum nr)
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{
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this_cpu_inc(diag_stat.counter[nr]);
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trace_s390_diagnose_norecursion(diag_map[nr].code);
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}
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EXPORT_SYMBOL(diag_stat_inc_norecursion);
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/*
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* Diagnose 14: Input spool file manipulation
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*/
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int diag14(unsigned long rx, unsigned long ry1, unsigned long subcode)
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{
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diag_stat_inc(DIAG_STAT_X014);
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return diag_amode31_ops.diag14(rx, ry1, subcode);
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}
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EXPORT_SYMBOL(diag14);
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static inline int __diag204(unsigned long *subcode, unsigned long size, void *addr)
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{
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union register_pair rp = { .even = *subcode, .odd = size };
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asm volatile(
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" diag %[addr],%[rp],0x204\n"
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"0: nopr %%r7\n"
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EX_TABLE(0b,0b)
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: [rp] "+&d" (rp.pair) : [addr] "d" (addr) : "memory");
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*subcode = rp.even;
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return rp.odd;
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}
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int diag204(unsigned long subcode, unsigned long size, void *addr)
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{
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diag_stat_inc(DIAG_STAT_X204);
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size = __diag204(&subcode, size, addr);
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if (subcode)
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return -1;
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return size;
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}
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EXPORT_SYMBOL(diag204);
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/*
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* Diagnose 210: Get information about a virtual device
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*/
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int diag210(struct diag210 *addr)
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{
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static DEFINE_SPINLOCK(diag210_lock);
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unsigned long flags;
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int ccode;
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spin_lock_irqsave(&diag210_lock, flags);
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*__diag210_tmp_amode31 = *addr;
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diag_stat_inc(DIAG_STAT_X210);
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ccode = diag_amode31_ops.diag210(__diag210_tmp_amode31);
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*addr = *__diag210_tmp_amode31;
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spin_unlock_irqrestore(&diag210_lock, flags);
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return ccode;
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}
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EXPORT_SYMBOL(diag210);
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/*
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* Diagnose 210: Get information about a virtual device
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*/
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int diag8c(struct diag8c *addr, struct ccw_dev_id *devno)
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{
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static DEFINE_SPINLOCK(diag8c_lock);
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unsigned long flags;
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int ccode;
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spin_lock_irqsave(&diag8c_lock, flags);
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diag_stat_inc(DIAG_STAT_X08C);
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ccode = diag_amode31_ops.diag8c(__diag8c_tmp_amode31, devno, sizeof(*addr));
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*addr = *__diag8c_tmp_amode31;
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spin_unlock_irqrestore(&diag8c_lock, flags);
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return ccode;
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}
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EXPORT_SYMBOL(diag8c);
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int diag224(void *ptr)
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{
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int rc = -EOPNOTSUPP;
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diag_stat_inc(DIAG_STAT_X224);
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asm volatile(
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" diag %1,%2,0x224\n"
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"0: lhi %0,0x0\n"
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"1:\n"
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EX_TABLE(0b,1b)
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: "+d" (rc) :"d" (0), "d" (ptr) : "memory");
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return rc;
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}
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EXPORT_SYMBOL(diag224);
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/*
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* Diagnose 26C: Access Certain System Information
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*/
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int diag26c(void *req, void *resp, enum diag26c_sc subcode)
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{
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diag_stat_inc(DIAG_STAT_X26C);
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return diag_amode31_ops.diag26c(req, resp, subcode);
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}
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EXPORT_SYMBOL(diag26c);
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