| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Author(s)......: Carsten Otte <cotte@de.ibm.com> |
| * Rob M van der Heij <rvdheij@nl.ibm.com> |
| * Steven Shultz <shultzss@us.ibm.com> |
| * Bugreports.to..: <Linux390@de.ibm.com> |
| * Copyright IBM Corp. 2002, 2004 |
| */ |
| |
| #define KMSG_COMPONENT "extmem" |
| #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt |
| |
| #include <linux/kernel.h> |
| #include <linux/string.h> |
| #include <linux/spinlock.h> |
| #include <linux/list.h> |
| #include <linux/slab.h> |
| #include <linux/export.h> |
| #include <linux/memblock.h> |
| #include <linux/ctype.h> |
| #include <linux/ioport.h> |
| #include <asm/diag.h> |
| #include <asm/page.h> |
| #include <asm/pgtable.h> |
| #include <asm/ebcdic.h> |
| #include <asm/errno.h> |
| #include <asm/extmem.h> |
| #include <asm/cpcmd.h> |
| #include <asm/setup.h> |
| |
| #define DCSS_LOADSHR 0x00 |
| #define DCSS_LOADNSR 0x04 |
| #define DCSS_PURGESEG 0x08 |
| #define DCSS_FINDSEG 0x0c |
| #define DCSS_LOADNOLY 0x10 |
| #define DCSS_SEGEXT 0x18 |
| #define DCSS_LOADSHRX 0x20 |
| #define DCSS_LOADNSRX 0x24 |
| #define DCSS_FINDSEGX 0x2c |
| #define DCSS_SEGEXTX 0x38 |
| #define DCSS_FINDSEGA 0x0c |
| |
| struct qrange { |
| unsigned long start; /* last byte type */ |
| unsigned long end; /* last byte reserved */ |
| }; |
| |
| struct qout64 { |
| unsigned long segstart; |
| unsigned long segend; |
| int segcnt; |
| int segrcnt; |
| struct qrange range[6]; |
| }; |
| |
| struct qrange_old { |
| unsigned int start; /* last byte type */ |
| unsigned int end; /* last byte reserved */ |
| }; |
| |
| /* output area format for the Diag x'64' old subcode x'18' */ |
| struct qout64_old { |
| int segstart; |
| int segend; |
| int segcnt; |
| int segrcnt; |
| struct qrange_old range[6]; |
| }; |
| |
| struct qin64 { |
| char qopcode; |
| char rsrv1[3]; |
| char qrcode; |
| char rsrv2[3]; |
| char qname[8]; |
| unsigned int qoutptr; |
| short int qoutlen; |
| }; |
| |
| struct dcss_segment { |
| struct list_head list; |
| char dcss_name[8]; |
| char res_name[16]; |
| unsigned long start_addr; |
| unsigned long end; |
| atomic_t ref_count; |
| int do_nonshared; |
| unsigned int vm_segtype; |
| struct qrange range[6]; |
| int segcnt; |
| struct resource *res; |
| }; |
| |
| static DEFINE_MUTEX(dcss_lock); |
| static LIST_HEAD(dcss_list); |
| static char *segtype_string[] = { "SW", "EW", "SR", "ER", "SN", "EN", "SC", |
| "EW/EN-MIXED" }; |
| static int loadshr_scode, loadnsr_scode; |
| static int segext_scode, purgeseg_scode; |
| static int scode_set; |
| |
| /* set correct Diag x'64' subcodes. */ |
| static int |
| dcss_set_subcodes(void) |
| { |
| char *name = kmalloc(8, GFP_KERNEL | GFP_DMA); |
| unsigned long rx, ry; |
| int rc; |
| |
| if (name == NULL) |
| return -ENOMEM; |
| |
| rx = (unsigned long) name; |
| ry = DCSS_FINDSEGX; |
| |
| strcpy(name, "dummy"); |
| diag_stat_inc(DIAG_STAT_X064); |
| asm volatile( |
| " diag %0,%1,0x64\n" |
| "0: ipm %2\n" |
| " srl %2,28\n" |
| " j 2f\n" |
| "1: la %2,3\n" |
| "2:\n" |
| EX_TABLE(0b, 1b) |
| : "+d" (rx), "+d" (ry), "=d" (rc) : : "cc", "memory"); |
| |
| kfree(name); |
| /* Diag x'64' new subcodes are supported, set to new subcodes */ |
| if (rc != 3) { |
| loadshr_scode = DCSS_LOADSHRX; |
| loadnsr_scode = DCSS_LOADNSRX; |
| purgeseg_scode = DCSS_PURGESEG; |
| segext_scode = DCSS_SEGEXTX; |
| return 0; |
| } |
| /* Diag x'64' new subcodes are not supported, set to old subcodes */ |
| loadshr_scode = DCSS_LOADNOLY; |
| loadnsr_scode = DCSS_LOADNSR; |
| purgeseg_scode = DCSS_PURGESEG; |
| segext_scode = DCSS_SEGEXT; |
| return 0; |
| } |
| |
| /* |
| * Create the 8 bytes, ebcdic VM segment name from |
| * an ascii name. |
| */ |
| static void |
| dcss_mkname(char *name, char *dcss_name) |
| { |
| int i; |
| |
| for (i = 0; i < 8; i++) { |
| if (name[i] == '\0') |
| break; |
| dcss_name[i] = toupper(name[i]); |
| } |
| for (; i < 8; i++) |
| dcss_name[i] = ' '; |
| ASCEBC(dcss_name, 8); |
| } |
| |
| |
| /* |
| * search all segments in dcss_list, and return the one |
| * namend *name. If not found, return NULL. |
| */ |
| static struct dcss_segment * |
| segment_by_name (char *name) |
| { |
| char dcss_name[9]; |
| struct list_head *l; |
| struct dcss_segment *tmp, *retval = NULL; |
| |
| BUG_ON(!mutex_is_locked(&dcss_lock)); |
| dcss_mkname (name, dcss_name); |
| list_for_each (l, &dcss_list) { |
| tmp = list_entry (l, struct dcss_segment, list); |
| if (memcmp(tmp->dcss_name, dcss_name, 8) == 0) { |
| retval = tmp; |
| break; |
| } |
| } |
| return retval; |
| } |
| |
| |
| /* |
| * Perform a function on a dcss segment. |
| */ |
| static inline int |
| dcss_diag(int *func, void *parameter, |
| unsigned long *ret1, unsigned long *ret2) |
| { |
| unsigned long rx, ry; |
| int rc; |
| |
| if (scode_set == 0) { |
| rc = dcss_set_subcodes(); |
| if (rc < 0) |
| return rc; |
| scode_set = 1; |
| } |
| rx = (unsigned long) parameter; |
| ry = (unsigned long) *func; |
| |
| /* 64-bit Diag x'64' new subcode, keep in 64-bit addressing mode */ |
| diag_stat_inc(DIAG_STAT_X064); |
| if (*func > DCSS_SEGEXT) |
| asm volatile( |
| " diag %0,%1,0x64\n" |
| " ipm %2\n" |
| " srl %2,28\n" |
| : "+d" (rx), "+d" (ry), "=d" (rc) : : "cc"); |
| /* 31-bit Diag x'64' old subcode, switch to 31-bit addressing mode */ |
| else |
| asm volatile( |
| " sam31\n" |
| " diag %0,%1,0x64\n" |
| " sam64\n" |
| " ipm %2\n" |
| " srl %2,28\n" |
| : "+d" (rx), "+d" (ry), "=d" (rc) : : "cc"); |
| *ret1 = rx; |
| *ret2 = ry; |
| return rc; |
| } |
| |
| static inline int |
| dcss_diag_translate_rc (int vm_rc) { |
| if (vm_rc == 44) |
| return -ENOENT; |
| return -EIO; |
| } |
| |
| |
| /* do a diag to get info about a segment. |
| * fills start_address, end and vm_segtype fields |
| */ |
| static int |
| query_segment_type (struct dcss_segment *seg) |
| { |
| unsigned long dummy, vmrc; |
| int diag_cc, rc, i; |
| struct qout64 *qout; |
| struct qin64 *qin; |
| |
| qin = kmalloc(sizeof(*qin), GFP_KERNEL | GFP_DMA); |
| qout = kmalloc(sizeof(*qout), GFP_KERNEL | GFP_DMA); |
| if ((qin == NULL) || (qout == NULL)) { |
| rc = -ENOMEM; |
| goto out_free; |
| } |
| |
| /* initialize diag input parameters */ |
| qin->qopcode = DCSS_FINDSEGA; |
| qin->qoutptr = (unsigned long) qout; |
| qin->qoutlen = sizeof(struct qout64); |
| memcpy (qin->qname, seg->dcss_name, 8); |
| |
| diag_cc = dcss_diag(&segext_scode, qin, &dummy, &vmrc); |
| |
| if (diag_cc < 0) { |
| rc = diag_cc; |
| goto out_free; |
| } |
| if (diag_cc > 1) { |
| pr_warn("Querying a DCSS type failed with rc=%ld\n", vmrc); |
| rc = dcss_diag_translate_rc (vmrc); |
| goto out_free; |
| } |
| |
| /* Only old format of output area of Diagnose x'64' is supported, |
| copy data for the new format. */ |
| if (segext_scode == DCSS_SEGEXT) { |
| struct qout64_old *qout_old; |
| qout_old = kzalloc(sizeof(*qout_old), GFP_KERNEL | GFP_DMA); |
| if (qout_old == NULL) { |
| rc = -ENOMEM; |
| goto out_free; |
| } |
| memcpy(qout_old, qout, sizeof(struct qout64_old)); |
| qout->segstart = (unsigned long) qout_old->segstart; |
| qout->segend = (unsigned long) qout_old->segend; |
| qout->segcnt = qout_old->segcnt; |
| qout->segrcnt = qout_old->segrcnt; |
| |
| if (qout->segcnt > 6) |
| qout->segrcnt = 6; |
| for (i = 0; i < qout->segrcnt; i++) { |
| qout->range[i].start = |
| (unsigned long) qout_old->range[i].start; |
| qout->range[i].end = |
| (unsigned long) qout_old->range[i].end; |
| } |
| kfree(qout_old); |
| } |
| if (qout->segcnt > 6) { |
| rc = -EOPNOTSUPP; |
| goto out_free; |
| } |
| |
| if (qout->segcnt == 1) { |
| seg->vm_segtype = qout->range[0].start & 0xff; |
| } else { |
| /* multi-part segment. only one type supported here: |
| - all parts are contiguous |
| - all parts are either EW or EN type |
| - maximum 6 parts allowed */ |
| unsigned long start = qout->segstart >> PAGE_SHIFT; |
| for (i=0; i<qout->segcnt; i++) { |
| if (((qout->range[i].start & 0xff) != SEG_TYPE_EW) && |
| ((qout->range[i].start & 0xff) != SEG_TYPE_EN)) { |
| rc = -EOPNOTSUPP; |
| goto out_free; |
| } |
| if (start != qout->range[i].start >> PAGE_SHIFT) { |
| rc = -EOPNOTSUPP; |
| goto out_free; |
| } |
| start = (qout->range[i].end >> PAGE_SHIFT) + 1; |
| } |
| seg->vm_segtype = SEG_TYPE_EWEN; |
| } |
| |
| /* analyze diag output and update seg */ |
| seg->start_addr = qout->segstart; |
| seg->end = qout->segend; |
| |
| memcpy (seg->range, qout->range, 6*sizeof(struct qrange)); |
| seg->segcnt = qout->segcnt; |
| |
| rc = 0; |
| |
| out_free: |
| kfree(qin); |
| kfree(qout); |
| return rc; |
| } |
| |
| /* |
| * get info about a segment |
| * possible return values: |
| * -ENOSYS : we are not running on VM |
| * -EIO : could not perform query diagnose |
| * -ENOENT : no such segment |
| * -EOPNOTSUPP: multi-part segment cannot be used with linux |
| * -ENOMEM : out of memory |
| * 0 .. 6 : type of segment as defined in include/asm-s390/extmem.h |
| */ |
| int |
| segment_type (char* name) |
| { |
| int rc; |
| struct dcss_segment seg; |
| |
| if (!MACHINE_IS_VM) |
| return -ENOSYS; |
| |
| dcss_mkname(name, seg.dcss_name); |
| rc = query_segment_type (&seg); |
| if (rc < 0) |
| return rc; |
| return seg.vm_segtype; |
| } |
| |
| /* |
| * check if segment collides with other segments that are currently loaded |
| * returns 1 if this is the case, 0 if no collision was found |
| */ |
| static int |
| segment_overlaps_others (struct dcss_segment *seg) |
| { |
| struct list_head *l; |
| struct dcss_segment *tmp; |
| |
| BUG_ON(!mutex_is_locked(&dcss_lock)); |
| list_for_each(l, &dcss_list) { |
| tmp = list_entry(l, struct dcss_segment, list); |
| if ((tmp->start_addr >> 20) > (seg->end >> 20)) |
| continue; |
| if ((tmp->end >> 20) < (seg->start_addr >> 20)) |
| continue; |
| if (seg == tmp) |
| continue; |
| return 1; |
| } |
| return 0; |
| } |
| |
| /* |
| * real segment loading function, called from segment_load |
| */ |
| static int |
| __segment_load (char *name, int do_nonshared, unsigned long *addr, unsigned long *end) |
| { |
| unsigned long start_addr, end_addr, dummy; |
| struct dcss_segment *seg; |
| int rc, diag_cc; |
| |
| start_addr = end_addr = 0; |
| seg = kmalloc(sizeof(*seg), GFP_KERNEL | GFP_DMA); |
| if (seg == NULL) { |
| rc = -ENOMEM; |
| goto out; |
| } |
| dcss_mkname (name, seg->dcss_name); |
| rc = query_segment_type (seg); |
| if (rc < 0) |
| goto out_free; |
| |
| if (loadshr_scode == DCSS_LOADSHRX) { |
| if (segment_overlaps_others(seg)) { |
| rc = -EBUSY; |
| goto out_free; |
| } |
| } |
| |
| rc = vmem_add_mapping(seg->start_addr, seg->end - seg->start_addr + 1); |
| |
| if (rc) |
| goto out_free; |
| |
| seg->res = kzalloc(sizeof(struct resource), GFP_KERNEL); |
| if (seg->res == NULL) { |
| rc = -ENOMEM; |
| goto out_shared; |
| } |
| seg->res->flags = IORESOURCE_BUSY | IORESOURCE_MEM; |
| seg->res->start = seg->start_addr; |
| seg->res->end = seg->end; |
| memcpy(&seg->res_name, seg->dcss_name, 8); |
| EBCASC(seg->res_name, 8); |
| seg->res_name[8] = '\0'; |
| strlcat(seg->res_name, " (DCSS)", sizeof(seg->res_name)); |
| seg->res->name = seg->res_name; |
| rc = seg->vm_segtype; |
| if (rc == SEG_TYPE_SC || |
| ((rc == SEG_TYPE_SR || rc == SEG_TYPE_ER) && !do_nonshared)) |
| seg->res->flags |= IORESOURCE_READONLY; |
| if (request_resource(&iomem_resource, seg->res)) { |
| rc = -EBUSY; |
| kfree(seg->res); |
| goto out_shared; |
| } |
| |
| if (do_nonshared) |
| diag_cc = dcss_diag(&loadnsr_scode, seg->dcss_name, |
| &start_addr, &end_addr); |
| else |
| diag_cc = dcss_diag(&loadshr_scode, seg->dcss_name, |
| &start_addr, &end_addr); |
| if (diag_cc < 0) { |
| dcss_diag(&purgeseg_scode, seg->dcss_name, |
| &dummy, &dummy); |
| rc = diag_cc; |
| goto out_resource; |
| } |
| if (diag_cc > 1) { |
| pr_warn("Loading DCSS %s failed with rc=%ld\n", name, end_addr); |
| rc = dcss_diag_translate_rc(end_addr); |
| dcss_diag(&purgeseg_scode, seg->dcss_name, |
| &dummy, &dummy); |
| goto out_resource; |
| } |
| seg->start_addr = start_addr; |
| seg->end = end_addr; |
| seg->do_nonshared = do_nonshared; |
| atomic_set(&seg->ref_count, 1); |
| list_add(&seg->list, &dcss_list); |
| *addr = seg->start_addr; |
| *end = seg->end; |
| if (do_nonshared) |
| pr_info("DCSS %s of range %p to %p and type %s loaded as " |
| "exclusive-writable\n", name, (void*) seg->start_addr, |
| (void*) seg->end, segtype_string[seg->vm_segtype]); |
| else { |
| pr_info("DCSS %s of range %p to %p and type %s loaded in " |
| "shared access mode\n", name, (void*) seg->start_addr, |
| (void*) seg->end, segtype_string[seg->vm_segtype]); |
| } |
| goto out; |
| out_resource: |
| release_resource(seg->res); |
| kfree(seg->res); |
| out_shared: |
| vmem_remove_mapping(seg->start_addr, seg->end - seg->start_addr + 1); |
| out_free: |
| kfree(seg); |
| out: |
| return rc; |
| } |
| |
| /* |
| * this function loads a DCSS segment |
| * name : name of the DCSS |
| * do_nonshared : 0 indicates that the dcss should be shared with other linux images |
| * 1 indicates that the dcss should be exclusive for this linux image |
| * addr : will be filled with start address of the segment |
| * end : will be filled with end address of the segment |
| * return values: |
| * -ENOSYS : we are not running on VM |
| * -EIO : could not perform query or load diagnose |
| * -ENOENT : no such segment |
| * -EOPNOTSUPP: multi-part segment cannot be used with linux |
| * -ENOSPC : segment cannot be used (overlaps with storage) |
| * -EBUSY : segment can temporarily not be used (overlaps with dcss) |
| * -ERANGE : segment cannot be used (exceeds kernel mapping range) |
| * -EPERM : segment is currently loaded with incompatible permissions |
| * -ENOMEM : out of memory |
| * 0 .. 6 : type of segment as defined in include/asm-s390/extmem.h |
| */ |
| int |
| segment_load (char *name, int do_nonshared, unsigned long *addr, |
| unsigned long *end) |
| { |
| struct dcss_segment *seg; |
| int rc; |
| |
| if (!MACHINE_IS_VM) |
| return -ENOSYS; |
| |
| mutex_lock(&dcss_lock); |
| seg = segment_by_name (name); |
| if (seg == NULL) |
| rc = __segment_load (name, do_nonshared, addr, end); |
| else { |
| if (do_nonshared == seg->do_nonshared) { |
| atomic_inc(&seg->ref_count); |
| *addr = seg->start_addr; |
| *end = seg->end; |
| rc = seg->vm_segtype; |
| } else { |
| *addr = *end = 0; |
| rc = -EPERM; |
| } |
| } |
| mutex_unlock(&dcss_lock); |
| return rc; |
| } |
| |
| /* |
| * this function modifies the shared state of a DCSS segment. note that |
| * name : name of the DCSS |
| * do_nonshared : 0 indicates that the dcss should be shared with other linux images |
| * 1 indicates that the dcss should be exclusive for this linux image |
| * return values: |
| * -EIO : could not perform load diagnose (segment gone!) |
| * -ENOENT : no such segment (segment gone!) |
| * -EAGAIN : segment is in use by other exploiters, try later |
| * -EINVAL : no segment with the given name is currently loaded - name invalid |
| * -EBUSY : segment can temporarily not be used (overlaps with dcss) |
| * 0 : operation succeeded |
| */ |
| int |
| segment_modify_shared (char *name, int do_nonshared) |
| { |
| struct dcss_segment *seg; |
| unsigned long start_addr, end_addr, dummy; |
| int rc, diag_cc; |
| |
| start_addr = end_addr = 0; |
| mutex_lock(&dcss_lock); |
| seg = segment_by_name (name); |
| if (seg == NULL) { |
| rc = -EINVAL; |
| goto out_unlock; |
| } |
| if (do_nonshared == seg->do_nonshared) { |
| pr_info("DCSS %s is already in the requested access " |
| "mode\n", name); |
| rc = 0; |
| goto out_unlock; |
| } |
| if (atomic_read (&seg->ref_count) != 1) { |
| pr_warn("DCSS %s is in use and cannot be reloaded\n", name); |
| rc = -EAGAIN; |
| goto out_unlock; |
| } |
| release_resource(seg->res); |
| if (do_nonshared) |
| seg->res->flags &= ~IORESOURCE_READONLY; |
| else |
| if (seg->vm_segtype == SEG_TYPE_SR || |
| seg->vm_segtype == SEG_TYPE_ER) |
| seg->res->flags |= IORESOURCE_READONLY; |
| |
| if (request_resource(&iomem_resource, seg->res)) { |
| pr_warn("DCSS %s overlaps with used memory resources and cannot be reloaded\n", |
| name); |
| rc = -EBUSY; |
| kfree(seg->res); |
| goto out_del_mem; |
| } |
| |
| dcss_diag(&purgeseg_scode, seg->dcss_name, &dummy, &dummy); |
| if (do_nonshared) |
| diag_cc = dcss_diag(&loadnsr_scode, seg->dcss_name, |
| &start_addr, &end_addr); |
| else |
| diag_cc = dcss_diag(&loadshr_scode, seg->dcss_name, |
| &start_addr, &end_addr); |
| if (diag_cc < 0) { |
| rc = diag_cc; |
| goto out_del_res; |
| } |
| if (diag_cc > 1) { |
| pr_warn("Reloading DCSS %s failed with rc=%ld\n", |
| name, end_addr); |
| rc = dcss_diag_translate_rc(end_addr); |
| goto out_del_res; |
| } |
| seg->start_addr = start_addr; |
| seg->end = end_addr; |
| seg->do_nonshared = do_nonshared; |
| rc = 0; |
| goto out_unlock; |
| out_del_res: |
| release_resource(seg->res); |
| kfree(seg->res); |
| out_del_mem: |
| vmem_remove_mapping(seg->start_addr, seg->end - seg->start_addr + 1); |
| list_del(&seg->list); |
| dcss_diag(&purgeseg_scode, seg->dcss_name, &dummy, &dummy); |
| kfree(seg); |
| out_unlock: |
| mutex_unlock(&dcss_lock); |
| return rc; |
| } |
| |
| /* |
| * Decrease the use count of a DCSS segment and remove |
| * it from the address space if nobody is using it |
| * any longer. |
| */ |
| void |
| segment_unload(char *name) |
| { |
| unsigned long dummy; |
| struct dcss_segment *seg; |
| |
| if (!MACHINE_IS_VM) |
| return; |
| |
| mutex_lock(&dcss_lock); |
| seg = segment_by_name (name); |
| if (seg == NULL) { |
| pr_err("Unloading unknown DCSS %s failed\n", name); |
| goto out_unlock; |
| } |
| if (atomic_dec_return(&seg->ref_count) != 0) |
| goto out_unlock; |
| release_resource(seg->res); |
| kfree(seg->res); |
| vmem_remove_mapping(seg->start_addr, seg->end - seg->start_addr + 1); |
| list_del(&seg->list); |
| dcss_diag(&purgeseg_scode, seg->dcss_name, &dummy, &dummy); |
| kfree(seg); |
| out_unlock: |
| mutex_unlock(&dcss_lock); |
| } |
| |
| /* |
| * save segment content permanently |
| */ |
| void |
| segment_save(char *name) |
| { |
| struct dcss_segment *seg; |
| char cmd1[160]; |
| char cmd2[80]; |
| int i, response; |
| |
| if (!MACHINE_IS_VM) |
| return; |
| |
| mutex_lock(&dcss_lock); |
| seg = segment_by_name (name); |
| |
| if (seg == NULL) { |
| pr_err("Saving unknown DCSS %s failed\n", name); |
| goto out; |
| } |
| |
| sprintf(cmd1, "DEFSEG %s", name); |
| for (i=0; i<seg->segcnt; i++) { |
| sprintf(cmd1+strlen(cmd1), " %lX-%lX %s", |
| seg->range[i].start >> PAGE_SHIFT, |
| seg->range[i].end >> PAGE_SHIFT, |
| segtype_string[seg->range[i].start & 0xff]); |
| } |
| sprintf(cmd2, "SAVESEG %s", name); |
| response = 0; |
| cpcmd(cmd1, NULL, 0, &response); |
| if (response) { |
| pr_err("Saving a DCSS failed with DEFSEG response code " |
| "%i\n", response); |
| goto out; |
| } |
| cpcmd(cmd2, NULL, 0, &response); |
| if (response) { |
| pr_err("Saving a DCSS failed with SAVESEG response code " |
| "%i\n", response); |
| goto out; |
| } |
| out: |
| mutex_unlock(&dcss_lock); |
| } |
| |
| /* |
| * print appropriate error message for segment_load()/segment_type() |
| * return code |
| */ |
| void segment_warning(int rc, char *seg_name) |
| { |
| switch (rc) { |
| case -ENOENT: |
| pr_err("DCSS %s cannot be loaded or queried\n", seg_name); |
| break; |
| case -ENOSYS: |
| pr_err("DCSS %s cannot be loaded or queried without " |
| "z/VM\n", seg_name); |
| break; |
| case -EIO: |
| pr_err("Loading or querying DCSS %s resulted in a " |
| "hardware error\n", seg_name); |
| break; |
| case -EOPNOTSUPP: |
| pr_err("DCSS %s has multiple page ranges and cannot be " |
| "loaded or queried\n", seg_name); |
| break; |
| case -ENOSPC: |
| pr_err("DCSS %s overlaps with used storage and cannot " |
| "be loaded\n", seg_name); |
| break; |
| case -EBUSY: |
| pr_err("%s needs used memory resources and cannot be " |
| "loaded or queried\n", seg_name); |
| break; |
| case -EPERM: |
| pr_err("DCSS %s is already loaded in a different access " |
| "mode\n", seg_name); |
| break; |
| case -ENOMEM: |
| pr_err("There is not enough memory to load or query " |
| "DCSS %s\n", seg_name); |
| break; |
| case -ERANGE: |
| pr_err("DCSS %s exceeds the kernel mapping range (%lu) " |
| "and cannot be loaded\n", seg_name, VMEM_MAX_PHYS); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| EXPORT_SYMBOL(segment_load); |
| EXPORT_SYMBOL(segment_unload); |
| EXPORT_SYMBOL(segment_save); |
| EXPORT_SYMBOL(segment_type); |
| EXPORT_SYMBOL(segment_modify_shared); |
| EXPORT_SYMBOL(segment_warning); |