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211 lines
5.5 KiB
211 lines
5.5 KiB
// 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 <[email protected]> |
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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/diag.h> |
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#include <asm/trace/diag.h> |
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#include <asm/sections.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_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 __bootdata_preserved(diag_dma_ops); |
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struct diag210 *__bootdata_preserved(__diag210_tmp_dma); |
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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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get_online_cpus(); |
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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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put_online_cpus(); |
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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_dma_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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register unsigned long _subcode asm("0") = *subcode; |
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register unsigned long _size asm("1") = size; |
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asm volatile( |
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" diag %2,%0,0x204\n" |
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"0: nopr %%r7\n" |
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EX_TABLE(0b,0b) |
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: "+d" (_subcode), "+d" (_size) : "d" (addr) : "memory"); |
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*subcode = _subcode; |
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return _size; |
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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_dma = *addr; |
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diag_stat_inc(DIAG_STAT_X210); |
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ccode = diag_dma_ops.diag210(__diag210_tmp_dma); |
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*addr = *__diag210_tmp_dma; |
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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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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_dma_ops.diag26c(req, resp, subcode); |
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} |
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EXPORT_SYMBOL(diag26c);
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