Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * Author(s)......: Carsten Otte <cotte@de.ibm.com> |
| 4 | * Rob M van der Heij <rvdheij@nl.ibm.com> |
| 5 | * Steven Shultz <shultzss@us.ibm.com> |
| 6 | * Bugreports.to..: <Linux390@de.ibm.com> |
Heiko Carstens | a53c8fa | 2012-07-20 11:15:04 +0200 | [diff] [blame] | 7 | * Copyright IBM Corp. 2002, 2004 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | */ |
| 9 | |
Hongjie Yang | 93098bf | 2008-12-25 13:39:45 +0100 | [diff] [blame] | 10 | #define KMSG_COMPONENT "extmem" |
| 11 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt |
| 12 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #include <linux/kernel.h> |
| 14 | #include <linux/string.h> |
| 15 | #include <linux/spinlock.h> |
| 16 | #include <linux/list.h> |
| 17 | #include <linux/slab.h> |
Paul Gortmaker | ff24b07 | 2017-02-09 15:20:24 -0500 | [diff] [blame] | 18 | #include <linux/export.h> |
Mike Rapoport | 57c8a66 | 2018-10-30 15:09:49 -0700 | [diff] [blame] | 19 | #include <linux/memblock.h> |
Heiko Carstens | 36a2bd4 | 2006-12-04 15:40:38 +0100 | [diff] [blame] | 20 | #include <linux/ctype.h> |
Gerald Schaefer | 444f0e5 | 2007-02-05 21:17:11 +0100 | [diff] [blame] | 21 | #include <linux/ioport.h> |
Martin Schwidefsky | 1ec2772 | 2015-08-20 17:28:44 +0200 | [diff] [blame] | 22 | #include <asm/diag.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #include <asm/page.h> |
Heiko Carstens | f4eb07c | 2006-12-08 15:56:07 +0100 | [diff] [blame] | 24 | #include <asm/pgtable.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include <asm/ebcdic.h> |
| 26 | #include <asm/errno.h> |
| 27 | #include <asm/extmem.h> |
| 28 | #include <asm/cpcmd.h> |
Heiko Carstens | 36a2bd4 | 2006-12-04 15:40:38 +0100 | [diff] [blame] | 29 | #include <asm/setup.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #define DCSS_PURGESEG 0x08 |
Hongjie Yang | b2300b9 | 2008-10-10 21:33:21 +0200 | [diff] [blame] | 32 | #define DCSS_LOADSHRX 0x20 |
| 33 | #define DCSS_LOADNSRX 0x24 |
| 34 | #define DCSS_FINDSEGX 0x2c |
| 35 | #define DCSS_SEGEXTX 0x38 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #define DCSS_FINDSEGA 0x0c |
| 37 | |
| 38 | struct qrange { |
Hongjie Yang | b2300b9 | 2008-10-10 21:33:21 +0200 | [diff] [blame] | 39 | unsigned long start; /* last byte type */ |
| 40 | unsigned long end; /* last byte reserved */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | }; |
| 42 | |
| 43 | struct qout64 { |
Hongjie Yang | b2300b9 | 2008-10-10 21:33:21 +0200 | [diff] [blame] | 44 | unsigned long segstart; |
| 45 | unsigned long segend; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | int segcnt; |
| 47 | int segrcnt; |
| 48 | struct qrange range[6]; |
| 49 | }; |
| 50 | |
| 51 | struct qin64 { |
| 52 | char qopcode; |
| 53 | char rsrv1[3]; |
| 54 | char qrcode; |
| 55 | char rsrv2[3]; |
| 56 | char qname[8]; |
| 57 | unsigned int qoutptr; |
| 58 | short int qoutlen; |
| 59 | }; |
| 60 | |
| 61 | struct dcss_segment { |
| 62 | struct list_head list; |
| 63 | char dcss_name[8]; |
Vasily Gorbik | 6b2ddf3 | 2018-06-17 00:30:43 +0200 | [diff] [blame] | 64 | char res_name[16]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | unsigned long start_addr; |
| 66 | unsigned long end; |
| 67 | atomic_t ref_count; |
| 68 | int do_nonshared; |
| 69 | unsigned int vm_segtype; |
| 70 | struct qrange range[6]; |
| 71 | int segcnt; |
Gerald Schaefer | 444f0e5 | 2007-02-05 21:17:11 +0100 | [diff] [blame] | 72 | struct resource *res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | }; |
| 74 | |
Heiko Carstens | 09252e7 | 2006-12-04 15:40:51 +0100 | [diff] [blame] | 75 | static DEFINE_MUTEX(dcss_lock); |
Denis Cheng | c11ca97 | 2008-01-26 14:11:13 +0100 | [diff] [blame] | 76 | static LIST_HEAD(dcss_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | static char *segtype_string[] = { "SW", "EW", "SR", "ER", "SN", "EN", "SC", |
| 78 | "EW/EN-MIXED" }; |
Gerald Schaefer | ca57114 | 2019-02-21 15:34:21 +0100 | [diff] [blame] | 79 | static int loadshr_scode = DCSS_LOADSHRX; |
| 80 | static int loadnsr_scode = DCSS_LOADNSRX; |
| 81 | static int purgeseg_scode = DCSS_PURGESEG; |
| 82 | static int segext_scode = DCSS_SEGEXTX; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | /* |
| 85 | * Create the 8 bytes, ebcdic VM segment name from |
| 86 | * an ascii name. |
| 87 | */ |
Heiko Carstens | 4d284ca | 2007-02-05 21:18:53 +0100 | [diff] [blame] | 88 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | dcss_mkname(char *name, char *dcss_name) |
| 90 | { |
| 91 | int i; |
| 92 | |
| 93 | for (i = 0; i < 8; i++) { |
| 94 | if (name[i] == '\0') |
| 95 | break; |
| 96 | dcss_name[i] = toupper(name[i]); |
Heiko Carstens | 0b92515 | 2017-01-02 08:51:02 +0100 | [diff] [blame] | 97 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | for (; i < 8; i++) |
| 99 | dcss_name[i] = ' '; |
| 100 | ASCEBC(dcss_name, 8); |
| 101 | } |
| 102 | |
| 103 | |
| 104 | /* |
| 105 | * search all segments in dcss_list, and return the one |
| 106 | * namend *name. If not found, return NULL. |
| 107 | */ |
| 108 | static struct dcss_segment * |
| 109 | segment_by_name (char *name) |
| 110 | { |
| 111 | char dcss_name[9]; |
| 112 | struct list_head *l; |
| 113 | struct dcss_segment *tmp, *retval = NULL; |
| 114 | |
Heiko Carstens | 09252e7 | 2006-12-04 15:40:51 +0100 | [diff] [blame] | 115 | BUG_ON(!mutex_is_locked(&dcss_lock)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | dcss_mkname (name, dcss_name); |
| 117 | list_for_each (l, &dcss_list) { |
| 118 | tmp = list_entry (l, struct dcss_segment, list); |
| 119 | if (memcmp(tmp->dcss_name, dcss_name, 8) == 0) { |
| 120 | retval = tmp; |
| 121 | break; |
| 122 | } |
| 123 | } |
| 124 | return retval; |
| 125 | } |
| 126 | |
| 127 | |
| 128 | /* |
| 129 | * Perform a function on a dcss segment. |
| 130 | */ |
| 131 | static inline int |
Hongjie Yang | b2300b9 | 2008-10-10 21:33:21 +0200 | [diff] [blame] | 132 | dcss_diag(int *func, void *parameter, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | unsigned long *ret1, unsigned long *ret2) |
| 134 | { |
| 135 | unsigned long rx, ry; |
| 136 | int rc; |
| 137 | |
| 138 | rx = (unsigned long) parameter; |
Hongjie Yang | b2300b9 | 2008-10-10 21:33:21 +0200 | [diff] [blame] | 139 | ry = (unsigned long) *func; |
| 140 | |
Martin Schwidefsky | 1ec2772 | 2015-08-20 17:28:44 +0200 | [diff] [blame] | 141 | diag_stat_inc(DIAG_STAT_X064); |
Gerald Schaefer | ca57114 | 2019-02-21 15:34:21 +0100 | [diff] [blame] | 142 | asm volatile( |
| 143 | " diag %0,%1,0x64\n" |
| 144 | " ipm %2\n" |
| 145 | " srl %2,28\n" |
| 146 | : "+d" (rx), "+d" (ry), "=d" (rc) : : "cc"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | *ret1 = rx; |
| 148 | *ret2 = ry; |
| 149 | return rc; |
| 150 | } |
| 151 | |
| 152 | static inline int |
| 153 | dcss_diag_translate_rc (int vm_rc) { |
| 154 | if (vm_rc == 44) |
| 155 | return -ENOENT; |
| 156 | return -EIO; |
| 157 | } |
| 158 | |
| 159 | |
| 160 | /* do a diag to get info about a segment. |
| 161 | * fills start_address, end and vm_segtype fields |
| 162 | */ |
| 163 | static int |
| 164 | query_segment_type (struct dcss_segment *seg) |
| 165 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | unsigned long dummy, vmrc; |
Heiko Carstens | c2f0e8c | 2010-06-08 18:58:09 +0200 | [diff] [blame] | 167 | int diag_cc, rc, i; |
| 168 | struct qout64 *qout; |
| 169 | struct qin64 *qin; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | |
Heiko Carstens | c2f0e8c | 2010-06-08 18:58:09 +0200 | [diff] [blame] | 171 | qin = kmalloc(sizeof(*qin), GFP_KERNEL | GFP_DMA); |
| 172 | qout = kmalloc(sizeof(*qout), GFP_KERNEL | GFP_DMA); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | if ((qin == NULL) || (qout == NULL)) { |
| 174 | rc = -ENOMEM; |
| 175 | goto out_free; |
| 176 | } |
| 177 | |
| 178 | /* initialize diag input parameters */ |
| 179 | qin->qopcode = DCSS_FINDSEGA; |
| 180 | qin->qoutptr = (unsigned long) qout; |
| 181 | qin->qoutlen = sizeof(struct qout64); |
| 182 | memcpy (qin->qname, seg->dcss_name, 8); |
| 183 | |
Hongjie Yang | b2300b9 | 2008-10-10 21:33:21 +0200 | [diff] [blame] | 184 | diag_cc = dcss_diag(&segext_scode, qin, &dummy, &vmrc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | |
Hongjie Yang | b2300b9 | 2008-10-10 21:33:21 +0200 | [diff] [blame] | 186 | if (diag_cc < 0) { |
| 187 | rc = diag_cc; |
| 188 | goto out_free; |
| 189 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | if (diag_cc > 1) { |
Joe Perches | baebc70 | 2016-03-03 20:49:57 -0800 | [diff] [blame] | 191 | pr_warn("Querying a DCSS type failed with rc=%ld\n", vmrc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | rc = dcss_diag_translate_rc (vmrc); |
| 193 | goto out_free; |
| 194 | } |
| 195 | |
| 196 | if (qout->segcnt > 6) { |
Heiko Carstens | b8e660b | 2010-02-26 22:37:41 +0100 | [diff] [blame] | 197 | rc = -EOPNOTSUPP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | goto out_free; |
| 199 | } |
| 200 | |
| 201 | if (qout->segcnt == 1) { |
| 202 | seg->vm_segtype = qout->range[0].start & 0xff; |
| 203 | } else { |
| 204 | /* multi-part segment. only one type supported here: |
| 205 | - all parts are contiguous |
| 206 | - all parts are either EW or EN type |
| 207 | - maximum 6 parts allowed */ |
| 208 | unsigned long start = qout->segstart >> PAGE_SHIFT; |
| 209 | for (i=0; i<qout->segcnt; i++) { |
| 210 | if (((qout->range[i].start & 0xff) != SEG_TYPE_EW) && |
| 211 | ((qout->range[i].start & 0xff) != SEG_TYPE_EN)) { |
Heiko Carstens | b8e660b | 2010-02-26 22:37:41 +0100 | [diff] [blame] | 212 | rc = -EOPNOTSUPP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | goto out_free; |
| 214 | } |
| 215 | if (start != qout->range[i].start >> PAGE_SHIFT) { |
Heiko Carstens | b8e660b | 2010-02-26 22:37:41 +0100 | [diff] [blame] | 216 | rc = -EOPNOTSUPP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | goto out_free; |
| 218 | } |
| 219 | start = (qout->range[i].end >> PAGE_SHIFT) + 1; |
| 220 | } |
| 221 | seg->vm_segtype = SEG_TYPE_EWEN; |
| 222 | } |
| 223 | |
| 224 | /* analyze diag output and update seg */ |
| 225 | seg->start_addr = qout->segstart; |
| 226 | seg->end = qout->segend; |
| 227 | |
| 228 | memcpy (seg->range, qout->range, 6*sizeof(struct qrange)); |
| 229 | seg->segcnt = qout->segcnt; |
| 230 | |
| 231 | rc = 0; |
| 232 | |
| 233 | out_free: |
Jesper Juhl | b2325fe | 2005-11-07 01:01:35 -0800 | [diff] [blame] | 234 | kfree(qin); |
| 235 | kfree(qout); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | return rc; |
| 237 | } |
| 238 | |
| 239 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | * get info about a segment |
| 241 | * possible return values: |
| 242 | * -ENOSYS : we are not running on VM |
| 243 | * -EIO : could not perform query diagnose |
| 244 | * -ENOENT : no such segment |
Heiko Carstens | b8e660b | 2010-02-26 22:37:41 +0100 | [diff] [blame] | 245 | * -EOPNOTSUPP: multi-part segment cannot be used with linux |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | * -ENOMEM : out of memory |
| 247 | * 0 .. 6 : type of segment as defined in include/asm-s390/extmem.h |
| 248 | */ |
| 249 | int |
| 250 | segment_type (char* name) |
| 251 | { |
| 252 | int rc; |
| 253 | struct dcss_segment seg; |
| 254 | |
| 255 | if (!MACHINE_IS_VM) |
| 256 | return -ENOSYS; |
| 257 | |
| 258 | dcss_mkname(name, seg.dcss_name); |
| 259 | rc = query_segment_type (&seg); |
| 260 | if (rc < 0) |
| 261 | return rc; |
| 262 | return seg.vm_segtype; |
| 263 | } |
| 264 | |
| 265 | /* |
Hongjie Yang | b2300b9 | 2008-10-10 21:33:21 +0200 | [diff] [blame] | 266 | * check if segment collides with other segments that are currently loaded |
| 267 | * returns 1 if this is the case, 0 if no collision was found |
| 268 | */ |
| 269 | static int |
| 270 | segment_overlaps_others (struct dcss_segment *seg) |
| 271 | { |
| 272 | struct list_head *l; |
| 273 | struct dcss_segment *tmp; |
| 274 | |
| 275 | BUG_ON(!mutex_is_locked(&dcss_lock)); |
| 276 | list_for_each(l, &dcss_list) { |
| 277 | tmp = list_entry(l, struct dcss_segment, list); |
| 278 | if ((tmp->start_addr >> 20) > (seg->end >> 20)) |
| 279 | continue; |
| 280 | if ((tmp->end >> 20) < (seg->start_addr >> 20)) |
| 281 | continue; |
| 282 | if (seg == tmp) |
| 283 | continue; |
| 284 | return 1; |
| 285 | } |
| 286 | return 0; |
| 287 | } |
| 288 | |
| 289 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | * real segment loading function, called from segment_load |
| 291 | */ |
| 292 | static int |
| 293 | __segment_load (char *name, int do_nonshared, unsigned long *addr, unsigned long *end) |
| 294 | { |
Hongjie Yang | b2300b9 | 2008-10-10 21:33:21 +0200 | [diff] [blame] | 295 | unsigned long start_addr, end_addr, dummy; |
Heiko Carstens | c2f0e8c | 2010-06-08 18:58:09 +0200 | [diff] [blame] | 296 | struct dcss_segment *seg; |
| 297 | int rc, diag_cc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | |
Heiko Carstens | 89db4df | 2011-05-23 10:24:29 +0200 | [diff] [blame] | 299 | start_addr = end_addr = 0; |
Heiko Carstens | c2f0e8c | 2010-06-08 18:58:09 +0200 | [diff] [blame] | 300 | seg = kmalloc(sizeof(*seg), GFP_KERNEL | GFP_DMA); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | if (seg == NULL) { |
| 302 | rc = -ENOMEM; |
| 303 | goto out; |
| 304 | } |
| 305 | dcss_mkname (name, seg->dcss_name); |
| 306 | rc = query_segment_type (seg); |
| 307 | if (rc < 0) |
| 308 | goto out_free; |
Heiko Carstens | f4eb07c | 2006-12-08 15:56:07 +0100 | [diff] [blame] | 309 | |
Gerald Schaefer | ca57114 | 2019-02-21 15:34:21 +0100 | [diff] [blame] | 310 | if (segment_overlaps_others(seg)) { |
| 311 | rc = -EBUSY; |
| 312 | goto out_free; |
Hongjie Yang | b2300b9 | 2008-10-10 21:33:21 +0200 | [diff] [blame] | 313 | } |
| 314 | |
Heiko Carstens | 17f3458 | 2008-04-30 13:38:47 +0200 | [diff] [blame] | 315 | rc = vmem_add_mapping(seg->start_addr, seg->end - seg->start_addr + 1); |
Heiko Carstens | f4eb07c | 2006-12-08 15:56:07 +0100 | [diff] [blame] | 316 | |
Martin Schwidefsky | ca68305 | 2008-04-17 07:46:31 +0200 | [diff] [blame] | 317 | if (rc) |
Heiko Carstens | f4eb07c | 2006-12-08 15:56:07 +0100 | [diff] [blame] | 318 | goto out_free; |
Heiko Carstens | f4eb07c | 2006-12-08 15:56:07 +0100 | [diff] [blame] | 319 | |
Gerald Schaefer | 444f0e5 | 2007-02-05 21:17:11 +0100 | [diff] [blame] | 320 | seg->res = kzalloc(sizeof(struct resource), GFP_KERNEL); |
| 321 | if (seg->res == NULL) { |
| 322 | rc = -ENOMEM; |
| 323 | goto out_shared; |
| 324 | } |
| 325 | seg->res->flags = IORESOURCE_BUSY | IORESOURCE_MEM; |
| 326 | seg->res->start = seg->start_addr; |
| 327 | seg->res->end = seg->end; |
| 328 | memcpy(&seg->res_name, seg->dcss_name, 8); |
| 329 | EBCASC(seg->res_name, 8); |
| 330 | seg->res_name[8] = '\0'; |
Vasily Gorbik | 6b2ddf3 | 2018-06-17 00:30:43 +0200 | [diff] [blame] | 331 | strlcat(seg->res_name, " (DCSS)", sizeof(seg->res_name)); |
Gerald Schaefer | 444f0e5 | 2007-02-05 21:17:11 +0100 | [diff] [blame] | 332 | seg->res->name = seg->res_name; |
| 333 | rc = seg->vm_segtype; |
| 334 | if (rc == SEG_TYPE_SC || |
| 335 | ((rc == SEG_TYPE_SR || rc == SEG_TYPE_ER) && !do_nonshared)) |
| 336 | seg->res->flags |= IORESOURCE_READONLY; |
| 337 | if (request_resource(&iomem_resource, seg->res)) { |
| 338 | rc = -EBUSY; |
| 339 | kfree(seg->res); |
| 340 | goto out_shared; |
| 341 | } |
| 342 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | if (do_nonshared) |
Hongjie Yang | b2300b9 | 2008-10-10 21:33:21 +0200 | [diff] [blame] | 344 | diag_cc = dcss_diag(&loadnsr_scode, seg->dcss_name, |
| 345 | &start_addr, &end_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | else |
Hongjie Yang | b2300b9 | 2008-10-10 21:33:21 +0200 | [diff] [blame] | 347 | diag_cc = dcss_diag(&loadshr_scode, seg->dcss_name, |
| 348 | &start_addr, &end_addr); |
| 349 | if (diag_cc < 0) { |
| 350 | dcss_diag(&purgeseg_scode, seg->dcss_name, |
| 351 | &dummy, &dummy); |
| 352 | rc = diag_cc; |
Gerald Schaefer | 444f0e5 | 2007-02-05 21:17:11 +0100 | [diff] [blame] | 353 | goto out_resource; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | } |
Hongjie Yang | b2300b9 | 2008-10-10 21:33:21 +0200 | [diff] [blame] | 355 | if (diag_cc > 1) { |
Joe Perches | baebc70 | 2016-03-03 20:49:57 -0800 | [diff] [blame] | 356 | pr_warn("Loading DCSS %s failed with rc=%ld\n", name, end_addr); |
Hongjie Yang | b2300b9 | 2008-10-10 21:33:21 +0200 | [diff] [blame] | 357 | rc = dcss_diag_translate_rc(end_addr); |
| 358 | dcss_diag(&purgeseg_scode, seg->dcss_name, |
| 359 | &dummy, &dummy); |
| 360 | goto out_resource; |
| 361 | } |
| 362 | seg->start_addr = start_addr; |
| 363 | seg->end = end_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | seg->do_nonshared = do_nonshared; |
| 365 | atomic_set(&seg->ref_count, 1); |
| 366 | list_add(&seg->list, &dcss_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | *addr = seg->start_addr; |
| 368 | *end = seg->end; |
| 369 | if (do_nonshared) |
Gerald Schaefer | f177762 | 2019-02-21 15:36:31 +0100 | [diff] [blame] | 370 | pr_info("DCSS %s of range %px to %px and type %s loaded as " |
Hongjie Yang | 93098bf | 2008-12-25 13:39:45 +0100 | [diff] [blame] | 371 | "exclusive-writable\n", name, (void*) seg->start_addr, |
| 372 | (void*) seg->end, segtype_string[seg->vm_segtype]); |
Gerald Schaefer | 444f0e5 | 2007-02-05 21:17:11 +0100 | [diff] [blame] | 373 | else { |
Gerald Schaefer | f177762 | 2019-02-21 15:36:31 +0100 | [diff] [blame] | 374 | pr_info("DCSS %s of range %px to %px and type %s loaded in " |
Hongjie Yang | 93098bf | 2008-12-25 13:39:45 +0100 | [diff] [blame] | 375 | "shared access mode\n", name, (void*) seg->start_addr, |
| 376 | (void*) seg->end, segtype_string[seg->vm_segtype]); |
Gerald Schaefer | 444f0e5 | 2007-02-05 21:17:11 +0100 | [diff] [blame] | 377 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | goto out; |
Gerald Schaefer | 444f0e5 | 2007-02-05 21:17:11 +0100 | [diff] [blame] | 379 | out_resource: |
| 380 | release_resource(seg->res); |
| 381 | kfree(seg->res); |
Heiko Carstens | f4eb07c | 2006-12-08 15:56:07 +0100 | [diff] [blame] | 382 | out_shared: |
Heiko Carstens | 17f3458 | 2008-04-30 13:38:47 +0200 | [diff] [blame] | 383 | vmem_remove_mapping(seg->start_addr, seg->end - seg->start_addr + 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | out_free: |
Jesper Juhl | b2325fe | 2005-11-07 01:01:35 -0800 | [diff] [blame] | 385 | kfree(seg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | out: |
| 387 | return rc; |
| 388 | } |
| 389 | |
| 390 | /* |
| 391 | * this function loads a DCSS segment |
| 392 | * name : name of the DCSS |
| 393 | * do_nonshared : 0 indicates that the dcss should be shared with other linux images |
| 394 | * 1 indicates that the dcss should be exclusive for this linux image |
| 395 | * addr : will be filled with start address of the segment |
| 396 | * end : will be filled with end address of the segment |
| 397 | * return values: |
| 398 | * -ENOSYS : we are not running on VM |
| 399 | * -EIO : could not perform query or load diagnose |
| 400 | * -ENOENT : no such segment |
Heiko Carstens | b8e660b | 2010-02-26 22:37:41 +0100 | [diff] [blame] | 401 | * -EOPNOTSUPP: multi-part segment cannot be used with linux |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | * -ENOSPC : segment cannot be used (overlaps with storage) |
| 403 | * -EBUSY : segment can temporarily not be used (overlaps with dcss) |
| 404 | * -ERANGE : segment cannot be used (exceeds kernel mapping range) |
| 405 | * -EPERM : segment is currently loaded with incompatible permissions |
| 406 | * -ENOMEM : out of memory |
| 407 | * 0 .. 6 : type of segment as defined in include/asm-s390/extmem.h |
| 408 | */ |
| 409 | int |
| 410 | segment_load (char *name, int do_nonshared, unsigned long *addr, |
| 411 | unsigned long *end) |
| 412 | { |
| 413 | struct dcss_segment *seg; |
| 414 | int rc; |
| 415 | |
| 416 | if (!MACHINE_IS_VM) |
| 417 | return -ENOSYS; |
| 418 | |
Heiko Carstens | 09252e7 | 2006-12-04 15:40:51 +0100 | [diff] [blame] | 419 | mutex_lock(&dcss_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | seg = segment_by_name (name); |
| 421 | if (seg == NULL) |
| 422 | rc = __segment_load (name, do_nonshared, addr, end); |
| 423 | else { |
| 424 | if (do_nonshared == seg->do_nonshared) { |
| 425 | atomic_inc(&seg->ref_count); |
| 426 | *addr = seg->start_addr; |
| 427 | *end = seg->end; |
| 428 | rc = seg->vm_segtype; |
| 429 | } else { |
| 430 | *addr = *end = 0; |
| 431 | rc = -EPERM; |
| 432 | } |
| 433 | } |
Heiko Carstens | 09252e7 | 2006-12-04 15:40:51 +0100 | [diff] [blame] | 434 | mutex_unlock(&dcss_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | return rc; |
| 436 | } |
| 437 | |
| 438 | /* |
| 439 | * this function modifies the shared state of a DCSS segment. note that |
| 440 | * name : name of the DCSS |
| 441 | * do_nonshared : 0 indicates that the dcss should be shared with other linux images |
| 442 | * 1 indicates that the dcss should be exclusive for this linux image |
| 443 | * return values: |
| 444 | * -EIO : could not perform load diagnose (segment gone!) |
| 445 | * -ENOENT : no such segment (segment gone!) |
| 446 | * -EAGAIN : segment is in use by other exploiters, try later |
| 447 | * -EINVAL : no segment with the given name is currently loaded - name invalid |
Gerald Schaefer | 444f0e5 | 2007-02-05 21:17:11 +0100 | [diff] [blame] | 448 | * -EBUSY : segment can temporarily not be used (overlaps with dcss) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | * 0 : operation succeeded |
| 450 | */ |
| 451 | int |
| 452 | segment_modify_shared (char *name, int do_nonshared) |
| 453 | { |
| 454 | struct dcss_segment *seg; |
Hongjie Yang | b2300b9 | 2008-10-10 21:33:21 +0200 | [diff] [blame] | 455 | unsigned long start_addr, end_addr, dummy; |
| 456 | int rc, diag_cc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | |
Heiko Carstens | 89db4df | 2011-05-23 10:24:29 +0200 | [diff] [blame] | 458 | start_addr = end_addr = 0; |
Heiko Carstens | 09252e7 | 2006-12-04 15:40:51 +0100 | [diff] [blame] | 459 | mutex_lock(&dcss_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | seg = segment_by_name (name); |
| 461 | if (seg == NULL) { |
| 462 | rc = -EINVAL; |
| 463 | goto out_unlock; |
| 464 | } |
| 465 | if (do_nonshared == seg->do_nonshared) { |
Hongjie Yang | 93098bf | 2008-12-25 13:39:45 +0100 | [diff] [blame] | 466 | pr_info("DCSS %s is already in the requested access " |
| 467 | "mode\n", name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | rc = 0; |
| 469 | goto out_unlock; |
| 470 | } |
| 471 | if (atomic_read (&seg->ref_count) != 1) { |
Joe Perches | baebc70 | 2016-03-03 20:49:57 -0800 | [diff] [blame] | 472 | pr_warn("DCSS %s is in use and cannot be reloaded\n", name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | rc = -EAGAIN; |
| 474 | goto out_unlock; |
| 475 | } |
Gerald Schaefer | 444f0e5 | 2007-02-05 21:17:11 +0100 | [diff] [blame] | 476 | release_resource(seg->res); |
Hongjie Yang | b2300b9 | 2008-10-10 21:33:21 +0200 | [diff] [blame] | 477 | if (do_nonshared) |
Gerald Schaefer | 444f0e5 | 2007-02-05 21:17:11 +0100 | [diff] [blame] | 478 | seg->res->flags &= ~IORESOURCE_READONLY; |
Hongjie Yang | b2300b9 | 2008-10-10 21:33:21 +0200 | [diff] [blame] | 479 | else |
Gerald Schaefer | 444f0e5 | 2007-02-05 21:17:11 +0100 | [diff] [blame] | 480 | if (seg->vm_segtype == SEG_TYPE_SR || |
| 481 | seg->vm_segtype == SEG_TYPE_ER) |
| 482 | seg->res->flags |= IORESOURCE_READONLY; |
Hongjie Yang | b2300b9 | 2008-10-10 21:33:21 +0200 | [diff] [blame] | 483 | |
Gerald Schaefer | 444f0e5 | 2007-02-05 21:17:11 +0100 | [diff] [blame] | 484 | if (request_resource(&iomem_resource, seg->res)) { |
Joe Perches | baebc70 | 2016-03-03 20:49:57 -0800 | [diff] [blame] | 485 | pr_warn("DCSS %s overlaps with used memory resources and cannot be reloaded\n", |
| 486 | name); |
Gerald Schaefer | 444f0e5 | 2007-02-05 21:17:11 +0100 | [diff] [blame] | 487 | rc = -EBUSY; |
| 488 | kfree(seg->res); |
Hongjie Yang | b2300b9 | 2008-10-10 21:33:21 +0200 | [diff] [blame] | 489 | goto out_del_mem; |
Gerald Schaefer | 444f0e5 | 2007-02-05 21:17:11 +0100 | [diff] [blame] | 490 | } |
Hongjie Yang | b2300b9 | 2008-10-10 21:33:21 +0200 | [diff] [blame] | 491 | |
| 492 | dcss_diag(&purgeseg_scode, seg->dcss_name, &dummy, &dummy); |
| 493 | if (do_nonshared) |
| 494 | diag_cc = dcss_diag(&loadnsr_scode, seg->dcss_name, |
| 495 | &start_addr, &end_addr); |
| 496 | else |
| 497 | diag_cc = dcss_diag(&loadshr_scode, seg->dcss_name, |
| 498 | &start_addr, &end_addr); |
| 499 | if (diag_cc < 0) { |
| 500 | rc = diag_cc; |
| 501 | goto out_del_res; |
| 502 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | if (diag_cc > 1) { |
Joe Perches | baebc70 | 2016-03-03 20:49:57 -0800 | [diff] [blame] | 504 | pr_warn("Reloading DCSS %s failed with rc=%ld\n", |
| 505 | name, end_addr); |
Hongjie Yang | b2300b9 | 2008-10-10 21:33:21 +0200 | [diff] [blame] | 506 | rc = dcss_diag_translate_rc(end_addr); |
| 507 | goto out_del_res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | } |
Hongjie Yang | b2300b9 | 2008-10-10 21:33:21 +0200 | [diff] [blame] | 509 | seg->start_addr = start_addr; |
| 510 | seg->end = end_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | seg->do_nonshared = do_nonshared; |
| 512 | rc = 0; |
| 513 | goto out_unlock; |
Hongjie Yang | b2300b9 | 2008-10-10 21:33:21 +0200 | [diff] [blame] | 514 | out_del_res: |
| 515 | release_resource(seg->res); |
| 516 | kfree(seg->res); |
| 517 | out_del_mem: |
Heiko Carstens | 17f3458 | 2008-04-30 13:38:47 +0200 | [diff] [blame] | 518 | vmem_remove_mapping(seg->start_addr, seg->end - seg->start_addr + 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | list_del(&seg->list); |
Hongjie Yang | b2300b9 | 2008-10-10 21:33:21 +0200 | [diff] [blame] | 520 | dcss_diag(&purgeseg_scode, seg->dcss_name, &dummy, &dummy); |
Jesper Juhl | b2325fe | 2005-11-07 01:01:35 -0800 | [diff] [blame] | 521 | kfree(seg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | out_unlock: |
Heiko Carstens | 09252e7 | 2006-12-04 15:40:51 +0100 | [diff] [blame] | 523 | mutex_unlock(&dcss_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | return rc; |
| 525 | } |
| 526 | |
| 527 | /* |
| 528 | * Decrease the use count of a DCSS segment and remove |
| 529 | * it from the address space if nobody is using it |
| 530 | * any longer. |
| 531 | */ |
| 532 | void |
| 533 | segment_unload(char *name) |
| 534 | { |
| 535 | unsigned long dummy; |
| 536 | struct dcss_segment *seg; |
| 537 | |
| 538 | if (!MACHINE_IS_VM) |
| 539 | return; |
| 540 | |
Heiko Carstens | 09252e7 | 2006-12-04 15:40:51 +0100 | [diff] [blame] | 541 | mutex_lock(&dcss_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | seg = segment_by_name (name); |
| 543 | if (seg == NULL) { |
Hongjie Yang | 93098bf | 2008-12-25 13:39:45 +0100 | [diff] [blame] | 544 | pr_err("Unloading unknown DCSS %s failed\n", name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | goto out_unlock; |
| 546 | } |
Heiko Carstens | f4eb07c | 2006-12-08 15:56:07 +0100 | [diff] [blame] | 547 | if (atomic_dec_return(&seg->ref_count) != 0) |
| 548 | goto out_unlock; |
Gerald Schaefer | 444f0e5 | 2007-02-05 21:17:11 +0100 | [diff] [blame] | 549 | release_resource(seg->res); |
| 550 | kfree(seg->res); |
Heiko Carstens | 17f3458 | 2008-04-30 13:38:47 +0200 | [diff] [blame] | 551 | vmem_remove_mapping(seg->start_addr, seg->end - seg->start_addr + 1); |
Heiko Carstens | f4eb07c | 2006-12-08 15:56:07 +0100 | [diff] [blame] | 552 | list_del(&seg->list); |
Hongjie Yang | b2300b9 | 2008-10-10 21:33:21 +0200 | [diff] [blame] | 553 | dcss_diag(&purgeseg_scode, seg->dcss_name, &dummy, &dummy); |
Heiko Carstens | f4eb07c | 2006-12-08 15:56:07 +0100 | [diff] [blame] | 554 | kfree(seg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | out_unlock: |
Heiko Carstens | 09252e7 | 2006-12-04 15:40:51 +0100 | [diff] [blame] | 556 | mutex_unlock(&dcss_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | } |
| 558 | |
| 559 | /* |
| 560 | * save segment content permanently |
| 561 | */ |
| 562 | void |
| 563 | segment_save(char *name) |
| 564 | { |
| 565 | struct dcss_segment *seg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | char cmd1[160]; |
| 567 | char cmd2[80]; |
Gerald Schaefer | 9b5dec1 | 2006-04-27 18:40:22 -0700 | [diff] [blame] | 568 | int i, response; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | |
| 570 | if (!MACHINE_IS_VM) |
| 571 | return; |
| 572 | |
Heiko Carstens | 09252e7 | 2006-12-04 15:40:51 +0100 | [diff] [blame] | 573 | mutex_lock(&dcss_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | seg = segment_by_name (name); |
| 575 | |
| 576 | if (seg == NULL) { |
Hongjie Yang | 93098bf | 2008-12-25 13:39:45 +0100 | [diff] [blame] | 577 | pr_err("Saving unknown DCSS %s failed\n", name); |
Heiko Carstens | 6b4044b | 2006-12-04 15:40:20 +0100 | [diff] [blame] | 578 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | } |
| 580 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | sprintf(cmd1, "DEFSEG %s", name); |
| 582 | for (i=0; i<seg->segcnt; i++) { |
Hongjie Yang | b2300b9 | 2008-10-10 21:33:21 +0200 | [diff] [blame] | 583 | sprintf(cmd1+strlen(cmd1), " %lX-%lX %s", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | seg->range[i].start >> PAGE_SHIFT, |
| 585 | seg->range[i].end >> PAGE_SHIFT, |
| 586 | segtype_string[seg->range[i].start & 0xff]); |
| 587 | } |
| 588 | sprintf(cmd2, "SAVESEG %s", name); |
Gerald Schaefer | 9b5dec1 | 2006-04-27 18:40:22 -0700 | [diff] [blame] | 589 | response = 0; |
| 590 | cpcmd(cmd1, NULL, 0, &response); |
| 591 | if (response) { |
Hongjie Yang | 93098bf | 2008-12-25 13:39:45 +0100 | [diff] [blame] | 592 | pr_err("Saving a DCSS failed with DEFSEG response code " |
| 593 | "%i\n", response); |
Gerald Schaefer | 9b5dec1 | 2006-04-27 18:40:22 -0700 | [diff] [blame] | 594 | goto out; |
| 595 | } |
| 596 | cpcmd(cmd2, NULL, 0, &response); |
| 597 | if (response) { |
Hongjie Yang | 93098bf | 2008-12-25 13:39:45 +0100 | [diff] [blame] | 598 | pr_err("Saving a DCSS failed with SAVESEG response code " |
| 599 | "%i\n", response); |
Gerald Schaefer | 9b5dec1 | 2006-04-27 18:40:22 -0700 | [diff] [blame] | 600 | goto out; |
| 601 | } |
| 602 | out: |
Heiko Carstens | 09252e7 | 2006-12-04 15:40:51 +0100 | [diff] [blame] | 603 | mutex_unlock(&dcss_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 604 | } |
| 605 | |
Martin Schwidefsky | ca68305 | 2008-04-17 07:46:31 +0200 | [diff] [blame] | 606 | /* |
| 607 | * print appropriate error message for segment_load()/segment_type() |
| 608 | * return code |
| 609 | */ |
| 610 | void segment_warning(int rc, char *seg_name) |
| 611 | { |
| 612 | switch (rc) { |
| 613 | case -ENOENT: |
Hongjie Yang | 93098bf | 2008-12-25 13:39:45 +0100 | [diff] [blame] | 614 | pr_err("DCSS %s cannot be loaded or queried\n", seg_name); |
Martin Schwidefsky | ca68305 | 2008-04-17 07:46:31 +0200 | [diff] [blame] | 615 | break; |
| 616 | case -ENOSYS: |
Hongjie Yang | 93098bf | 2008-12-25 13:39:45 +0100 | [diff] [blame] | 617 | pr_err("DCSS %s cannot be loaded or queried without " |
| 618 | "z/VM\n", seg_name); |
Martin Schwidefsky | ca68305 | 2008-04-17 07:46:31 +0200 | [diff] [blame] | 619 | break; |
| 620 | case -EIO: |
Hongjie Yang | 93098bf | 2008-12-25 13:39:45 +0100 | [diff] [blame] | 621 | pr_err("Loading or querying DCSS %s resulted in a " |
| 622 | "hardware error\n", seg_name); |
Martin Schwidefsky | ca68305 | 2008-04-17 07:46:31 +0200 | [diff] [blame] | 623 | break; |
Heiko Carstens | b8e660b | 2010-02-26 22:37:41 +0100 | [diff] [blame] | 624 | case -EOPNOTSUPP: |
Hongjie Yang | 93098bf | 2008-12-25 13:39:45 +0100 | [diff] [blame] | 625 | pr_err("DCSS %s has multiple page ranges and cannot be " |
| 626 | "loaded or queried\n", seg_name); |
Martin Schwidefsky | ca68305 | 2008-04-17 07:46:31 +0200 | [diff] [blame] | 627 | break; |
| 628 | case -ENOSPC: |
Hongjie Yang | 93098bf | 2008-12-25 13:39:45 +0100 | [diff] [blame] | 629 | pr_err("DCSS %s overlaps with used storage and cannot " |
| 630 | "be loaded\n", seg_name); |
Martin Schwidefsky | ca68305 | 2008-04-17 07:46:31 +0200 | [diff] [blame] | 631 | break; |
| 632 | case -EBUSY: |
Hongjie Yang | 93098bf | 2008-12-25 13:39:45 +0100 | [diff] [blame] | 633 | pr_err("%s needs used memory resources and cannot be " |
| 634 | "loaded or queried\n", seg_name); |
Martin Schwidefsky | ca68305 | 2008-04-17 07:46:31 +0200 | [diff] [blame] | 635 | break; |
| 636 | case -EPERM: |
Hongjie Yang | 93098bf | 2008-12-25 13:39:45 +0100 | [diff] [blame] | 637 | pr_err("DCSS %s is already loaded in a different access " |
| 638 | "mode\n", seg_name); |
Martin Schwidefsky | ca68305 | 2008-04-17 07:46:31 +0200 | [diff] [blame] | 639 | break; |
| 640 | case -ENOMEM: |
Hongjie Yang | 93098bf | 2008-12-25 13:39:45 +0100 | [diff] [blame] | 641 | pr_err("There is not enough memory to load or query " |
| 642 | "DCSS %s\n", seg_name); |
Martin Schwidefsky | ca68305 | 2008-04-17 07:46:31 +0200 | [diff] [blame] | 643 | break; |
| 644 | case -ERANGE: |
Hongjie Yang | 93098bf | 2008-12-25 13:39:45 +0100 | [diff] [blame] | 645 | pr_err("DCSS %s exceeds the kernel mapping range (%lu) " |
| 646 | "and cannot be loaded\n", seg_name, VMEM_MAX_PHYS); |
Martin Schwidefsky | ca68305 | 2008-04-17 07:46:31 +0200 | [diff] [blame] | 647 | break; |
| 648 | default: |
Martin Schwidefsky | ca68305 | 2008-04-17 07:46:31 +0200 | [diff] [blame] | 649 | break; |
| 650 | } |
| 651 | } |
| 652 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | EXPORT_SYMBOL(segment_load); |
| 654 | EXPORT_SYMBOL(segment_unload); |
| 655 | EXPORT_SYMBOL(segment_save); |
| 656 | EXPORT_SYMBOL(segment_type); |
| 657 | EXPORT_SYMBOL(segment_modify_shared); |
Martin Schwidefsky | ca68305 | 2008-04-17 07:46:31 +0200 | [diff] [blame] | 658 | EXPORT_SYMBOL(segment_warning); |