aboutsummaryrefslogtreecommitdiffstats
path: root/arch/s390/kernel
diff options
context:
space:
mode:
authorChristian Borntraeger <cborntra@de.ibm.com>2005-06-25 17:55:32 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-25 19:24:37 -0400
commit6b979de395c7e1b7e59f74a870e1d1911853eccb (patch)
tree82502e9e93c977b0f812d017f5d8d4e12436c6c8 /arch/s390/kernel
parent77fa22450de00d535de2cc8be653983560828000 (diff)
[PATCH] s390: add vmcp interface
Add interface to issue VM control program commands. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/s390/kernel')
-rw-r--r--arch/s390/kernel/cpcmd.c109
-rw-r--r--arch/s390/kernel/setup.c6
-rw-r--r--arch/s390/kernel/smp.c6
-rw-r--r--arch/s390/kernel/traps.c2
4 files changed, 72 insertions, 51 deletions
diff --git a/arch/s390/kernel/cpcmd.c b/arch/s390/kernel/cpcmd.c
index 44df8dc07c59..20062145e84e 100644
--- a/arch/s390/kernel/cpcmd.c
+++ b/arch/s390/kernel/cpcmd.c
@@ -2,7 +2,7 @@
2 * arch/s390/kernel/cpcmd.c 2 * arch/s390/kernel/cpcmd.c
3 * 3 *
4 * S390 version 4 * S390 version
5 * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation 5 * Copyright (C) 1999,2005 IBM Deutschland Entwicklung GmbH, IBM Corporation
6 * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com), 6 * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
7 * Christian Borntraeger (cborntra@de.ibm.com), 7 * Christian Borntraeger (cborntra@de.ibm.com),
8 */ 8 */
@@ -18,93 +18,114 @@
18#include <asm/system.h> 18#include <asm/system.h>
19 19
20static DEFINE_SPINLOCK(cpcmd_lock); 20static DEFINE_SPINLOCK(cpcmd_lock);
21static char cpcmd_buf[240]; 21static char cpcmd_buf[241];
22 22
23/* 23/*
24 * the caller of __cpcmd has to ensure that the response buffer is below 2 GB 24 * the caller of __cpcmd has to ensure that the response buffer is below 2 GB
25 */ 25 */
26void __cpcmd(char *cmd, char *response, int rlen) 26int __cpcmd(const char *cmd, char *response, int rlen, int *response_code)
27{ 27{
28 const int mask = 0x40000000L; 28 const int mask = 0x40000000L;
29 unsigned long flags; 29 unsigned long flags;
30 int return_code;
31 int return_len;
30 int cmdlen; 32 int cmdlen;
31 33
32 spin_lock_irqsave(&cpcmd_lock, flags); 34 spin_lock_irqsave(&cpcmd_lock, flags);
33 cmdlen = strlen(cmd); 35 cmdlen = strlen(cmd);
34 BUG_ON(cmdlen > 240); 36 BUG_ON(cmdlen > 240);
35 strcpy(cpcmd_buf, cmd); 37 memcpy(cpcmd_buf, cmd, cmdlen);
36 ASCEBC(cpcmd_buf, cmdlen); 38 ASCEBC(cpcmd_buf, cmdlen);
37 39
38 if (response != NULL && rlen > 0) { 40 if (response != NULL && rlen > 0) {
39 memset(response, 0, rlen); 41 memset(response, 0, rlen);
40#ifndef CONFIG_ARCH_S390X 42#ifndef CONFIG_ARCH_S390X
41 asm volatile ("LRA 2,0(%0)\n\t" 43 asm volatile ( "lra 2,0(%2)\n"
42 "LR 4,%1\n\t" 44 "lr 4,%3\n"
43 "O 4,%4\n\t" 45 "o 4,%6\n"
44 "LRA 3,0(%2)\n\t" 46 "lra 3,0(%4)\n"
45 "LR 5,%3\n\t" 47 "lr 5,%5\n"
46 ".long 0x83240008 # Diagnose X'08'\n\t" 48 "diag 2,4,0x8\n"
47 : /* no output */ 49 "brc 8, .Litfits\n"
48 : "a" (cpcmd_buf), "d" (cmdlen), 50 "ar 5, %5\n"
49 "a" (response), "d" (rlen), "m" (mask) 51 ".Litfits: \n"
50 : "cc", "2", "3", "4", "5" ); 52 "lr %0,4\n"
53 "lr %1,5\n"
54 : "=d" (return_code), "=d" (return_len)
55 : "a" (cpcmd_buf), "d" (cmdlen),
56 "a" (response), "d" (rlen), "m" (mask)
57 : "cc", "2", "3", "4", "5" );
51#else /* CONFIG_ARCH_S390X */ 58#else /* CONFIG_ARCH_S390X */
52 asm volatile (" lrag 2,0(%0)\n" 59 asm volatile ( "lrag 2,0(%2)\n"
53 " lgr 4,%1\n" 60 "lgr 4,%3\n"
54 " o 4,%4\n" 61 "o 4,%6\n"
55 " lrag 3,0(%2)\n" 62 "lrag 3,0(%4)\n"
56 " lgr 5,%3\n" 63 "lgr 5,%5\n"
57 " sam31\n" 64 "sam31\n"
58 " .long 0x83240008 # Diagnose X'08'\n" 65 "diag 2,4,0x8\n"
59 " sam64" 66 "sam64\n"
60 : /* no output */ 67 "brc 8, .Litfits\n"
61 : "a" (cpcmd_buf), "d" (cmdlen), 68 "agr 5, %5\n"
62 "a" (response), "d" (rlen), "m" (mask) 69 ".Litfits: \n"
63 : "cc", "2", "3", "4", "5" ); 70 "lgr %0,4\n"
71 "lgr %1,5\n"
72 : "=d" (return_code), "=d" (return_len)
73 : "a" (cpcmd_buf), "d" (cmdlen),
74 "a" (response), "d" (rlen), "m" (mask)
75 : "cc", "2", "3", "4", "5" );
64#endif /* CONFIG_ARCH_S390X */ 76#endif /* CONFIG_ARCH_S390X */
65 EBCASC(response, rlen); 77 EBCASC(response, rlen);
66 } else { 78 } else {
79 return_len = 0;
67#ifndef CONFIG_ARCH_S390X 80#ifndef CONFIG_ARCH_S390X
68 asm volatile ("LRA 2,0(%0)\n\t" 81 asm volatile ( "lra 2,0(%1)\n"
69 "LR 3,%1\n\t" 82 "lr 3,%2\n"
70 ".long 0x83230008 # Diagnose X'08'\n\t" 83 "diag 2,3,0x8\n"
71 : /* no output */ 84 "lr %0,3\n"
72 : "a" (cpcmd_buf), "d" (cmdlen) 85 : "=d" (return_code)
73 : "2", "3" ); 86 : "a" (cpcmd_buf), "d" (cmdlen)
87 : "2", "3" );
74#else /* CONFIG_ARCH_S390X */ 88#else /* CONFIG_ARCH_S390X */
75 asm volatile (" lrag 2,0(%0)\n" 89 asm volatile ( "lrag 2,0(%1)\n"
76 " lgr 3,%1\n" 90 "lgr 3,%2\n"
77 " sam31\n" 91 "sam31\n"
78 " .long 0x83230008 # Diagnose X'08'\n" 92 "diag 2,3,0x8\n"
79 " sam64" 93 "sam64\n"
80 : /* no output */ 94 "lgr %0,3\n"
81 : "a" (cpcmd_buf), "d" (cmdlen) 95 : "=d" (return_code)
82 : "2", "3" ); 96 : "a" (cpcmd_buf), "d" (cmdlen)
97 : "2", "3" );
83#endif /* CONFIG_ARCH_S390X */ 98#endif /* CONFIG_ARCH_S390X */
84 } 99 }
85 spin_unlock_irqrestore(&cpcmd_lock, flags); 100 spin_unlock_irqrestore(&cpcmd_lock, flags);
101 if (response_code != NULL)
102 *response_code = return_code;
103 return return_len;
86} 104}
87 105
88EXPORT_SYMBOL(__cpcmd); 106EXPORT_SYMBOL(__cpcmd);
89 107
90#ifdef CONFIG_ARCH_S390X 108#ifdef CONFIG_ARCH_S390X
91void cpcmd(char *cmd, char *response, int rlen) 109int cpcmd(const char *cmd, char *response, int rlen, int *response_code)
92{ 110{
93 char *lowbuf; 111 char *lowbuf;
112 int len;
113
94 if ((rlen == 0) || (response == NULL) 114 if ((rlen == 0) || (response == NULL)
95 || !((unsigned long)response >> 31)) 115 || !((unsigned long)response >> 31))
96 __cpcmd(cmd, response, rlen); 116 len = __cpcmd(cmd, response, rlen, response_code);
97 else { 117 else {
98 lowbuf = kmalloc(rlen, GFP_KERNEL | GFP_DMA); 118 lowbuf = kmalloc(rlen, GFP_KERNEL | GFP_DMA);
99 if (!lowbuf) { 119 if (!lowbuf) {
100 printk(KERN_WARNING 120 printk(KERN_WARNING
101 "cpcmd: could not allocate response buffer\n"); 121 "cpcmd: could not allocate response buffer\n");
102 return; 122 return -ENOMEM;
103 } 123 }
104 __cpcmd(cmd, lowbuf, rlen); 124 len = __cpcmd(cmd, lowbuf, rlen, response_code);
105 memcpy(response, lowbuf, rlen); 125 memcpy(response, lowbuf, rlen);
106 kfree(lowbuf); 126 kfree(lowbuf);
107 } 127 }
128 return len;
108} 129}
109 130
110EXPORT_SYMBOL(cpcmd); 131EXPORT_SYMBOL(cpcmd);
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index eb7be0ad7175..b6d740ac0e6e 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -198,11 +198,11 @@ static void __init conmode_default(void)
198 char *ptr; 198 char *ptr;
199 199
200 if (MACHINE_IS_VM) { 200 if (MACHINE_IS_VM) {
201 __cpcmd("QUERY CONSOLE", query_buffer, 1024); 201 __cpcmd("QUERY CONSOLE", query_buffer, 1024, NULL);
202 console_devno = simple_strtoul(query_buffer + 5, NULL, 16); 202 console_devno = simple_strtoul(query_buffer + 5, NULL, 16);
203 ptr = strstr(query_buffer, "SUBCHANNEL ="); 203 ptr = strstr(query_buffer, "SUBCHANNEL =");
204 console_irq = simple_strtoul(ptr + 13, NULL, 16); 204 console_irq = simple_strtoul(ptr + 13, NULL, 16);
205 __cpcmd("QUERY TERM", query_buffer, 1024); 205 __cpcmd("QUERY TERM", query_buffer, 1024, NULL);
206 ptr = strstr(query_buffer, "CONMODE"); 206 ptr = strstr(query_buffer, "CONMODE");
207 /* 207 /*
208 * Set the conmode to 3215 so that the device recognition 208 * Set the conmode to 3215 so that the device recognition
@@ -211,7 +211,7 @@ static void __init conmode_default(void)
211 * 3215 and the 3270 driver will try to access the console 211 * 3215 and the 3270 driver will try to access the console
212 * device (3215 as console and 3270 as normal tty). 212 * device (3215 as console and 3270 as normal tty).
213 */ 213 */
214 __cpcmd("TERM CONMODE 3215", NULL, 0); 214 __cpcmd("TERM CONMODE 3215", NULL, 0, NULL);
215 if (ptr == NULL) { 215 if (ptr == NULL) {
216#if defined(CONFIG_SCLP_CONSOLE) 216#if defined(CONFIG_SCLP_CONSOLE)
217 SET_CONSOLE_SCLP; 217 SET_CONSOLE_SCLP;
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 50c335067cfe..642572a8e334 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -284,7 +284,7 @@ static void do_machine_restart(void * __unused)
284 * locks are always held disabled). 284 * locks are always held disabled).
285 */ 285 */
286 if (MACHINE_IS_VM) 286 if (MACHINE_IS_VM)
287 cpcmd ("IPL", NULL, 0); 287 cpcmd ("IPL", NULL, 0, NULL);
288 else 288 else
289 reipl (0x10000 | S390_lowcore.ipl_device); 289 reipl (0x10000 | S390_lowcore.ipl_device);
290} 290}
@@ -313,7 +313,7 @@ static void do_machine_halt(void * __unused)
313 if (atomic_compare_and_swap(-1, smp_processor_id(), &cpuid) == 0) { 313 if (atomic_compare_and_swap(-1, smp_processor_id(), &cpuid) == 0) {
314 smp_send_stop(); 314 smp_send_stop();
315 if (MACHINE_IS_VM && strlen(vmhalt_cmd) > 0) 315 if (MACHINE_IS_VM && strlen(vmhalt_cmd) > 0)
316 cpcmd(vmhalt_cmd, NULL, 0); 316 cpcmd(vmhalt_cmd, NULL, 0, NULL);
317 signal_processor(smp_processor_id(), 317 signal_processor(smp_processor_id(),
318 sigp_stop_and_store_status); 318 sigp_stop_and_store_status);
319 } 319 }
@@ -332,7 +332,7 @@ static void do_machine_power_off(void * __unused)
332 if (atomic_compare_and_swap(-1, smp_processor_id(), &cpuid) == 0) { 332 if (atomic_compare_and_swap(-1, smp_processor_id(), &cpuid) == 0) {
333 smp_send_stop(); 333 smp_send_stop();
334 if (MACHINE_IS_VM && strlen(vmpoff_cmd) > 0) 334 if (MACHINE_IS_VM && strlen(vmpoff_cmd) > 0)
335 cpcmd(vmpoff_cmd, NULL, 0); 335 cpcmd(vmpoff_cmd, NULL, 0, NULL);
336 signal_processor(smp_processor_id(), 336 signal_processor(smp_processor_id(),
337 sigp_stop_and_store_status); 337 sigp_stop_and_store_status);
338 } 338 }
diff --git a/arch/s390/kernel/traps.c b/arch/s390/kernel/traps.c
index ca34b6f34b38..bc7b7be7acbe 100644
--- a/arch/s390/kernel/traps.c
+++ b/arch/s390/kernel/traps.c
@@ -735,7 +735,7 @@ void __init trap_init(void)
735 &ext_int_pfault); 735 &ext_int_pfault);
736#endif 736#endif
737#ifndef CONFIG_ARCH_S390X 737#ifndef CONFIG_ARCH_S390X
738 cpcmd("SET PAGEX ON", NULL, 0); 738 cpcmd("SET PAGEX ON", NULL, 0, NULL);
739#endif 739#endif
740 } 740 }
741} 741}
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-15 16:13:32 -0500