// SPDX-License-Identifier: GPL-2.0 /* * Implementation of s390 diagnose codes * * Copyright IBM Corp. 2007 * Author(s): Michael Holzheu */ #include #include #include #include #include #include #include #include #include #include #include "entry.h" struct diag_stat { unsigned int counter[NR_DIAG_STAT]; }; static DEFINE_PER_CPU(struct diag_stat, diag_stat); struct diag_desc { int code; char *name; }; static const struct diag_desc diag_map[NR_DIAG_STAT] = { [DIAG_STAT_X008] = { .code = 0x008, .name = "Console Function" }, [DIAG_STAT_X00C] = { .code = 0x00c, .name = "Pseudo Timer" }, [DIAG_STAT_X010] = { .code = 0x010, .name = "Release Pages" }, [DIAG_STAT_X014] = { .code = 0x014, .name = "Spool File Services" }, [DIAG_STAT_X044] = { .code = 0x044, .name = "Voluntary Timeslice End" }, [DIAG_STAT_X064] = { .code = 0x064, .name = "NSS Manipulation" }, [DIAG_STAT_X08C] = { .code = 0x08c, .name = "Access 3270 Display Device Information" }, [DIAG_STAT_X09C] = { .code = 0x09c, .name = "Relinquish Timeslice" }, [DIAG_STAT_X0DC] = { .code = 0x0dc, .name = "Appldata Control" }, [DIAG_STAT_X204] = { .code = 0x204, .name = "Logical-CPU Utilization" }, [DIAG_STAT_X210] = { .code = 0x210, .name = "Device Information" }, [DIAG_STAT_X224] = { .code = 0x224, .name = "EBCDIC-Name Table" }, [DIAG_STAT_X250] = { .code = 0x250, .name = "Block I/O" }, [DIAG_STAT_X258] = { .code = 0x258, .name = "Page-Reference Services" }, [DIAG_STAT_X26C] = { .code = 0x26c, .name = "Certain System Information" }, [DIAG_STAT_X288] = { .code = 0x288, .name = "Time Bomb" }, [DIAG_STAT_X2C4] = { .code = 0x2c4, .name = "FTP Services" }, [DIAG_STAT_X2FC] = { .code = 0x2fc, .name = "Guest Performance Data" }, [DIAG_STAT_X304] = { .code = 0x304, .name = "Partition-Resource Service" }, [DIAG_STAT_X308] = { .code = 0x308, .name = "List-Directed IPL" }, [DIAG_STAT_X318] = { .code = 0x318, .name = "CP Name and Version Codes" }, [DIAG_STAT_X320] = { .code = 0x320, .name = "Certificate Store" }, [DIAG_STAT_X49C] = { .code = 0x49c, .name = "Warning-Track Interruption" }, [DIAG_STAT_X500] = { .code = 0x500, .name = "Virtio Service" }, }; struct diag_ops __amode31_ref diag_amode31_ops = { .diag210 = _diag210_amode31, .diag26c = _diag26c_amode31, .diag14 = _diag14_amode31, .diag0c = _diag0c_amode31, .diag8c = _diag8c_amode31, .diag308_reset = _diag308_reset_amode31 }; static struct diag210 _diag210_tmp_amode31 __section(".amode31.data"); struct diag210 __amode31_ref *__diag210_tmp_amode31 = &_diag210_tmp_amode31; static struct diag8c _diag8c_tmp_amode31 __section(".amode31.data"); static struct diag8c __amode31_ref *__diag8c_tmp_amode31 = &_diag8c_tmp_amode31; static int show_diag_stat(struct seq_file *m, void *v) { struct diag_stat *stat; unsigned long n = (unsigned long) v - 1; int cpu, prec, tmp; cpus_read_lock(); if (n == 0) { seq_puts(m, " "); for_each_online_cpu(cpu) { prec = 10; for (tmp = 10; cpu >= tmp; tmp *= 10) prec--; seq_printf(m, "%*s%d", prec, "CPU", cpu); } seq_putc(m, '\n'); } else if (n <= NR_DIAG_STAT) { seq_printf(m, "diag %03x:", diag_map[n-1].code); for_each_online_cpu(cpu) { stat = &per_cpu(diag_stat, cpu); seq_printf(m, " %10u", stat->counter[n-1]); } seq_printf(m, " %s\n", diag_map[n-1].name); } cpus_read_unlock(); return 0; } static void *show_diag_stat_start(struct seq_file *m, loff_t *pos) { return *pos <= NR_DIAG_STAT ? (void *)((unsigned long) *pos + 1) : NULL; } static void *show_diag_stat_next(struct seq_file *m, void *v, loff_t *pos) { ++*pos; return show_diag_stat_start(m, pos); } static void show_diag_stat_stop(struct seq_file *m, void *v) { } static const struct seq_operations show_diag_stat_sops = { .start = show_diag_stat_start, .next = show_diag_stat_next, .stop = show_diag_stat_stop, .show = show_diag_stat, }; DEFINE_SEQ_ATTRIBUTE(show_diag_stat); static int __init show_diag_stat_init(void) { debugfs_create_file("diag_stat", 0400, NULL, NULL, &show_diag_stat_fops); return 0; } device_initcall(show_diag_stat_init); void diag_stat_inc(enum diag_stat_enum nr) { this_cpu_inc(diag_stat.counter[nr]); trace_s390_diagnose(diag_map[nr].code); } EXPORT_SYMBOL(diag_stat_inc); void notrace diag_stat_inc_norecursion(enum diag_stat_enum nr) { this_cpu_inc(diag_stat.counter[nr]); trace_s390_diagnose_norecursion(diag_map[nr].code); } EXPORT_SYMBOL(diag_stat_inc_norecursion); /* * Diagnose 0c: Pseudo Timer */ void diag0c(struct hypfs_diag0c_entry *data) { diag_stat_inc(DIAG_STAT_X00C); diag_amode31_ops.diag0c(virt_to_phys(data)); } /* * Diagnose 14: Input spool file manipulation * * The subcode parameter determines the type of the first parameter rx. * Currently used are the following 3 subcommands: * 0x0: Read the Next Spool File Buffer (Data Record) * 0x28: Position a Spool File to the Designated Record * 0xfff: Retrieve Next File Descriptor * * For subcommands 0x0 and 0xfff, the value of the first parameter is * a virtual address of a memory buffer and needs virtual to physical * address translation. For other subcommands the rx parameter is not * a virtual address. */ int diag14(unsigned long rx, unsigned long ry1, unsigned long subcode) { diag_stat_inc(DIAG_STAT_X014); switch (subcode) { case 0x0: case 0xfff: rx = virt_to_phys((void *)rx); break; default: /* Do nothing */ break; } return diag_amode31_ops.diag14(rx, ry1, subcode); } EXPORT_SYMBOL(diag14); #define DIAG204_BUSY_RC 8 static inline int __diag204(unsigned long *subcode, unsigned long size, void *addr) { union register_pair rp = { .even = *subcode, .odd = size }; asm volatile( " diag %[addr],%[rp],0x204\n" "0: nopr %%r7\n" EX_TABLE(0b,0b) : [rp] "+&d" (rp.pair) : [addr] "d" (addr) : "memory"); *subcode = rp.even; return rp.odd; } /** * diag204() - Issue diagnose 204 call. * @subcode: Subcode of diagnose 204 to be executed. * @size: Size of area in pages which @area points to, if given. * @addr: Vmalloc'ed memory area where the result is written to. * * Execute diagnose 204 with the given subcode and write the result to the * memory area specified with @addr. For subcodes which do not write a * result to memory both @size and @addr must be zero. If @addr is * specified it must be page aligned and must have been allocated with * vmalloc(). Conversion to real / physical addresses will be handled by * this function if required. */ int diag204(unsigned long subcode, unsigned long size, void *addr) { if (addr) { if (WARN_ON_ONCE(!is_vmalloc_addr(addr))) return -EINVAL; if (WARN_ON_ONCE(!IS_ALIGNED((unsigned long)addr, PAGE_SIZE))) return -EINVAL; } if ((subcode & DIAG204_SUBCODE_MASK) == DIAG204_SUBC_STIB4) addr = (void *)pfn_to_phys(vmalloc_to_pfn(addr)); diag_stat_inc(DIAG_STAT_X204); size = __diag204(&subcode, size, addr); if (subcode == DIAG204_BUSY_RC) return -EBUSY; else if (subcode) return -EOPNOTSUPP; return size; } EXPORT_SYMBOL(diag204); /* * Diagnose 210: Get information about a virtual device */ int diag210(struct diag210 *addr) { static DEFINE_SPINLOCK(diag210_lock); unsigned long flags; int ccode; spin_lock_irqsave(&diag210_lock, flags); *__diag210_tmp_amode31 = *addr; diag_stat_inc(DIAG_STAT_X210); ccode = diag_amode31_ops.diag210(__diag210_tmp_amode31); *addr = *__diag210_tmp_amode31; spin_unlock_irqrestore(&diag210_lock, flags); return ccode; } EXPORT_SYMBOL(diag210); /* * Diagnose 8C: Access 3270 Display Device Information */ int diag8c(struct diag8c *addr, struct ccw_dev_id *devno) { static DEFINE_SPINLOCK(diag8c_lock); unsigned long flags; int ccode; spin_lock_irqsave(&diag8c_lock, flags); diag_stat_inc(DIAG_STAT_X08C); ccode = diag_amode31_ops.diag8c(__diag8c_tmp_amode31, devno, sizeof(*addr)); *addr = *__diag8c_tmp_amode31; spin_unlock_irqrestore(&diag8c_lock, flags); return ccode; } EXPORT_SYMBOL(diag8c); int diag224(void *ptr) { unsigned long addr = __pa(ptr); int rc = -EOPNOTSUPP; diag_stat_inc(DIAG_STAT_X224); asm volatile("\n" " diag %[type],%[addr],0x224\n" "0: lhi %[rc],0\n" "1:\n" EX_TABLE(0b,1b) : [rc] "+d" (rc) , "=m" (*(struct { char buf[PAGE_SIZE]; } *)ptr) : [type] "d" (0), [addr] "d" (addr)); return rc; } EXPORT_SYMBOL(diag224); /* * Diagnose 26C: Access Certain System Information */ int diag26c(void *req, void *resp, enum diag26c_sc subcode) { diag_stat_inc(DIAG_STAT_X26C); return diag_amode31_ops.diag26c(virt_to_phys(req), virt_to_phys(resp), subcode); } EXPORT_SYMBOL(diag26c); int diag49c(unsigned long subcode) { int rc; diag_stat_inc(DIAG_STAT_X49C); asm volatile( " diag %[subcode],0,0x49c\n" " ipm %[rc]\n" " srl %[rc],28\n" : [rc] "=d" (rc) : [subcode] "d" (subcode) : "cc"); return rc; } EXPORT_SYMBOL(diag49c);