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1b03047816
Implement support for the hypervisor diagnose 0x26c
('Access Certain System Information').
It passes a request buffer and a subfunction code, and receives
a response buffer and a return code.
Also add the scaffolding for the 'MAC Services' subfunction.
It may be used by network devices to obtain a hypervisor-managed
MAC address.
Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
268 lines
6.6 KiB
C
268 lines
6.6 KiB
C
/*
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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/diag.h>
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#include <asm/trace/diag.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_X500] = { .code = 0x500, .name = "Virtio Service" },
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};
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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_cpu_ids ? (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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static int show_diag_stat_open(struct inode *inode, struct file *file)
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{
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return seq_open(file, &show_diag_stat_sops);
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}
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static const struct file_operations show_diag_stat_fops = {
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.open = show_diag_stat_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 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 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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static inline int __diag14(unsigned long rx, unsigned long ry1,
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unsigned long subcode)
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{
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register unsigned long _ry1 asm("2") = ry1;
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register unsigned long _ry2 asm("3") = subcode;
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int rc = 0;
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asm volatile(
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" sam31\n"
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" diag %2,2,0x14\n"
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" sam64\n"
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" ipm %0\n"
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" srl %0,28\n"
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: "=d" (rc), "+d" (_ry2)
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: "d" (rx), "d" (_ry1)
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: "cc");
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return rc;
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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 __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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/*
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* diag 210 needs its data below the 2GB border, so we
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* use a static data area to be sure
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*/
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static struct diag210 diag210_tmp;
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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 = *addr;
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diag_stat_inc(DIAG_STAT_X210);
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asm volatile(
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" lhi %0,-1\n"
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" sam31\n"
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" diag %1,0,0x210\n"
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"0: ipm %0\n"
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" srl %0,28\n"
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"1: sam64\n"
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EX_TABLE(0b, 1b)
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: "=&d" (ccode) : "a" (&diag210_tmp) : "cc", "memory");
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*addr = diag210_tmp;
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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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static inline int __diag26c(void *req, void *resp, enum diag26c_sc subcode)
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{
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register unsigned long _req asm("2") = (addr_t) req;
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register unsigned long _resp asm("3") = (addr_t) resp;
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register unsigned long _subcode asm("4") = subcode;
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register unsigned long _rc asm("5") = -EOPNOTSUPP;
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asm volatile(
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" sam31\n"
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" diag %[rx],%[ry],0x26c\n"
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"0: sam64\n"
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EX_TABLE(0b,0b)
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: "+d" (_rc)
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: [rx] "d" (_req), "d" (_resp), [ry] "d" (_subcode)
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: "cc", "memory");
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return _rc;
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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 __diag26c(req, resp, subcode);
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}
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EXPORT_SYMBOL(diag26c);
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