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-rw-r--r--arch/s390/kernel/head64.S72
-rw-r--r--arch/s390/kernel/ipl.c232
-rw-r--r--arch/s390/kernel/setup.c38
-rw-r--r--arch/s390/kernel/smp.c62
4 files changed, 318 insertions, 86 deletions
diff --git a/arch/s390/kernel/head64.S b/arch/s390/kernel/head64.S
index 37010709fe6..a87b1976d40 100644
--- a/arch/s390/kernel/head64.S
+++ b/arch/s390/kernel/head64.S
@@ -39,7 +39,69 @@ startup_continue:
basr %r13,0 # get base
.LPG1: sll %r13,1 # remove high order bit
srl %r13,1
- lhi %r1,1 # mode 1 = esame
+
+#ifdef CONFIG_ZFCPDUMP
+
+ # check if we have been ipled using zfcp dump:
+
+ tm 0xb9,0x01 # test if subchannel is enabled
+ jno .nodump # subchannel disabled
+ l %r1,0xb8
+ la %r5,.Lipl_schib-.LPG1(%r13)
+ stsch 0(%r5) # get schib of subchannel
+ jne .nodump # schib not available
+ tm 5(%r5),0x01 # devno valid?
+ jno .nodump
+ tm 4(%r5),0x80 # qdio capable device?
+ jno .nodump
+ l %r2,20(%r0) # address of ipl parameter block
+ lhi %r3,0
+ ic %r3,0x148(%r2) # get opt field
+ chi %r3,0x20 # load with dump?
+ jne .nodump
+
+ # store all prefix registers in case of load with dump:
+
+ la %r7,0 # base register for 0 page
+ la %r8,0 # first cpu
+ l %r11,.Lpref_arr_ptr-.LPG1(%r13) # address of prefix array
+ ahi %r11,4 # skip boot cpu
+ lr %r12,%r11
+ ahi %r12,(CONFIG_NR_CPUS*4) # end of prefix array
+ stap .Lcurrent_cpu+2-.LPG1(%r13) # store current cpu addr
+1:
+ cl %r8,.Lcurrent_cpu-.LPG1(%r13) # is ipl cpu ?
+ je 4f # if yes get next cpu
+2:
+ lr %r9,%r7
+ sigp %r9,%r8,0x9 # stop & store status of cpu
+ brc 8,3f # accepted
+ brc 4,4f # status stored: next cpu
+ brc 2,2b # busy: try again
+ brc 1,4f # not op: next cpu
+3:
+ mvc 0(4,%r11),264(%r7) # copy prefix register to prefix array
+ ahi %r11,4 # next element in prefix array
+ clr %r11,%r12
+ je 5f # no more space in prefix array
+4:
+ ahi %r8,1 # next cpu (r8 += 1)
+ cl %r8,.Llast_cpu-.LPG1(%r13) # is last possible cpu ?
+ jl 1b # jump if not last cpu
+5:
+ lhi %r1,2 # mode 2 = esame (dump)
+ j 6f
+ .align 4
+.Lipl_schib:
+ .rept 13
+ .long 0
+ .endr
+.nodump:
+ lhi %r1,1 # mode 1 = esame (normal ipl)
+6:
+#else
+ lhi %r1,1 # mode 1 = esame (normal ipl)
+#endif /* CONFIG_ZFCPDUMP */
mvi __LC_AR_MODE_ID,1 # set esame flag
slr %r0,%r0 # set cpuid to zero
sigp %r1,%r0,0x12 # switch to esame mode
@@ -149,6 +211,14 @@ startup_continue:
.L4malign:.quad 0xffffffffffc00000
.Lscan2g:.quad 0x80000000 + 0x20000 - 8 # 2GB + 128K - 8
.Lnop: .long 0x07000700
+#ifdef CONFIG_ZFCPDUMP
+.Lcurrent_cpu:
+ .long 0x0
+.Llast_cpu:
+ .long 0x0000ffff
+.Lpref_arr_ptr:
+ .long zfcpdump_prefix_array
+#endif /* CONFIG_ZFCPDUMP */
.Lparmaddr:
.quad PARMAREA
.align 64
diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
index a83cf1fdd8f..06833ac2b11 100644
--- a/arch/s390/kernel/ipl.c
+++ b/arch/s390/kernel/ipl.c
@@ -29,36 +29,21 @@
#define SCCB_LOADPARM (&s390_readinfo_sccb.loadparm)
#define SCCB_FLAG (s390_readinfo_sccb.flags)
-enum ipl_type {
- IPL_TYPE_NONE = 1,
- IPL_TYPE_UNKNOWN = 2,
- IPL_TYPE_CCW = 4,
- IPL_TYPE_FCP = 8,
- IPL_TYPE_NSS = 16,
-};
-
-#define IPL_NONE_STR "none"
-#define IPL_UNKNOWN_STR "unknown"
-#define IPL_CCW_STR "ccw"
-#define IPL_FCP_STR "fcp"
-#define IPL_NSS_STR "nss"
-
-/*
- * Must be in data section since the bss section
- * is not cleared when these are accessed.
- */
-static u16 ipl_devno __attribute__((__section__(".data"))) = 0;
-u32 ipl_flags __attribute__((__section__(".data"))) = 0;
+#define IPL_UNKNOWN_STR "unknown"
+#define IPL_CCW_STR "ccw"
+#define IPL_FCP_STR "fcp"
+#define IPL_FCP_DUMP_STR "fcp_dump"
+#define IPL_NSS_STR "nss"
static char *ipl_type_str(enum ipl_type type)
{
switch (type) {
- case IPL_TYPE_NONE:
- return IPL_NONE_STR;
case IPL_TYPE_CCW:
return IPL_CCW_STR;
case IPL_TYPE_FCP:
return IPL_FCP_STR;
+ case IPL_TYPE_FCP_DUMP:
+ return IPL_FCP_DUMP_STR;
case IPL_TYPE_NSS:
return IPL_NSS_STR;
case IPL_TYPE_UNKNOWN:
@@ -67,15 +52,55 @@ static char *ipl_type_str(enum ipl_type type)
}
}
+enum dump_type {
+ DUMP_TYPE_NONE = 1,
+ DUMP_TYPE_CCW = 2,
+ DUMP_TYPE_FCP = 4,
+};
+
+#define DUMP_NONE_STR "none"
+#define DUMP_CCW_STR "ccw"
+#define DUMP_FCP_STR "fcp"
+
+static char *dump_type_str(enum dump_type type)
+{
+ switch (type) {
+ case DUMP_TYPE_NONE:
+ return DUMP_NONE_STR;
+ case DUMP_TYPE_CCW:
+ return DUMP_CCW_STR;
+ case DUMP_TYPE_FCP:
+ return DUMP_FCP_STR;
+ default:
+ return NULL;
+ }
+}
+
+/*
+ * Must be in data section since the bss section
+ * is not cleared when these are accessed.
+ */
+static u16 ipl_devno __attribute__((__section__(".data"))) = 0;
+u32 ipl_flags __attribute__((__section__(".data"))) = 0;
+
enum ipl_method {
- IPL_METHOD_NONE,
- IPL_METHOD_CCW_CIO,
- IPL_METHOD_CCW_DIAG,
- IPL_METHOD_CCW_VM,
- IPL_METHOD_FCP_RO_DIAG,
- IPL_METHOD_FCP_RW_DIAG,
- IPL_METHOD_FCP_RO_VM,
- IPL_METHOD_NSS,
+ REIPL_METHOD_CCW_CIO,
+ REIPL_METHOD_CCW_DIAG,
+ REIPL_METHOD_CCW_VM,
+ REIPL_METHOD_FCP_RO_DIAG,
+ REIPL_METHOD_FCP_RW_DIAG,
+ REIPL_METHOD_FCP_RO_VM,
+ REIPL_METHOD_FCP_DUMP,
+ REIPL_METHOD_NSS,
+ REIPL_METHOD_DEFAULT,
+};
+
+enum dump_method {
+ DUMP_METHOD_NONE,
+ DUMP_METHOD_CCW_CIO,
+ DUMP_METHOD_CCW_DIAG,
+ DUMP_METHOD_CCW_VM,
+ DUMP_METHOD_FCP_DIAG,
};
enum shutdown_action {
@@ -107,15 +132,15 @@ static int diag308_set_works = 0;
static int reipl_capabilities = IPL_TYPE_UNKNOWN;
static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
-static enum ipl_method reipl_method = IPL_METHOD_NONE;
+static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
static struct ipl_parameter_block *reipl_block_fcp;
static struct ipl_parameter_block *reipl_block_ccw;
static char reipl_nss_name[NSS_NAME_SIZE + 1];
-static int dump_capabilities = IPL_TYPE_NONE;
-static enum ipl_type dump_type = IPL_TYPE_NONE;
-static enum ipl_method dump_method = IPL_METHOD_NONE;
+static int dump_capabilities = DUMP_TYPE_NONE;
+static enum dump_type dump_type = DUMP_TYPE_NONE;
+static enum dump_method dump_method = DUMP_METHOD_NONE;
static struct ipl_parameter_block *dump_block_fcp;
static struct ipl_parameter_block *dump_block_ccw;
@@ -134,6 +159,7 @@ int diag308(unsigned long subcode, void *addr)
: "d" (subcode) : "cc", "memory");
return _rc;
}
+EXPORT_SYMBOL_GPL(diag308);
/* SYSFS */
@@ -197,7 +223,7 @@ static void make_attrs_ro(struct attribute **attrs)
* ipl section
*/
-static enum ipl_type ipl_get_type(void)
+static __init enum ipl_type get_ipl_type(void)
{
struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
@@ -211,12 +237,44 @@ static enum ipl_type ipl_get_type(void)
return IPL_TYPE_UNKNOWN;
if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
return IPL_TYPE_UNKNOWN;
+ if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
+ return IPL_TYPE_FCP_DUMP;
return IPL_TYPE_FCP;
}
+void __init setup_ipl_info(void)
+{
+ ipl_info.type = get_ipl_type();
+ switch (ipl_info.type) {
+ case IPL_TYPE_CCW:
+ ipl_info.data.ccw.dev_id.devno = ipl_devno;
+ ipl_info.data.ccw.dev_id.ssid = 0;
+ break;
+ case IPL_TYPE_FCP:
+ case IPL_TYPE_FCP_DUMP:
+ ipl_info.data.fcp.dev_id.devno =
+ IPL_PARMBLOCK_START->ipl_info.fcp.devno;
+ ipl_info.data.fcp.dev_id.ssid = 0;
+ ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
+ ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
+ break;
+ case IPL_TYPE_NSS:
+ strncpy(ipl_info.data.nss.name, kernel_nss_name,
+ sizeof(ipl_info.data.nss.name));
+ break;
+ case IPL_TYPE_UNKNOWN:
+ default:
+ /* We have no info to copy */
+ break;
+ }
+}
+
+struct ipl_info ipl_info;
+EXPORT_SYMBOL_GPL(ipl_info);
+
static ssize_t ipl_type_show(struct subsystem *subsys, char *page)
{
- return sprintf(page, "%s\n", ipl_type_str(ipl_get_type()));
+ return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
}
static struct subsys_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
@@ -225,10 +283,11 @@ static ssize_t sys_ipl_device_show(struct subsystem *subsys, char *page)
{
struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
- switch (ipl_get_type()) {
+ switch (ipl_info.type) {
case IPL_TYPE_CCW:
return sprintf(page, "0.0.%04x\n", ipl_devno);
case IPL_TYPE_FCP:
+ case IPL_TYPE_FCP_DUMP:
return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
default:
return 0;
@@ -485,23 +544,29 @@ static int reipl_set_type(enum ipl_type type)
switch(type) {
case IPL_TYPE_CCW:
if (MACHINE_IS_VM)
- reipl_method = IPL_METHOD_CCW_VM;
+ reipl_method = REIPL_METHOD_CCW_VM;
else
- reipl_method = IPL_METHOD_CCW_CIO;
+ reipl_method = REIPL_METHOD_CCW_CIO;
break;
case IPL_TYPE_FCP:
if (diag308_set_works)
- reipl_method = IPL_METHOD_FCP_RW_DIAG;
+ reipl_method = REIPL_METHOD_FCP_RW_DIAG;
else if (MACHINE_IS_VM)
- reipl_method = IPL_METHOD_FCP_RO_VM;
+ reipl_method = REIPL_METHOD_FCP_RO_VM;
else
- reipl_method = IPL_METHOD_FCP_RO_DIAG;
+ reipl_method = REIPL_METHOD_FCP_RO_DIAG;
+ break;
+ case IPL_TYPE_FCP_DUMP:
+ reipl_method = REIPL_METHOD_FCP_DUMP;
break;
case IPL_TYPE_NSS:
- reipl_method = IPL_METHOD_NSS;
+ reipl_method = REIPL_METHOD_NSS;
+ break;
+ case IPL_TYPE_UNKNOWN:
+ reipl_method = REIPL_METHOD_DEFAULT;
break;
default:
- reipl_method = IPL_METHOD_NONE;
+ BUG();
}
reipl_type = type;
return 0;
@@ -579,22 +644,22 @@ static struct attribute_group dump_ccw_attr_group = {
/* dump type */
-static int dump_set_type(enum ipl_type type)
+static int dump_set_type(enum dump_type type)
{
if (!(dump_capabilities & type))
return -EINVAL;
switch(type) {
- case IPL_TYPE_CCW:
+ case DUMP_TYPE_CCW:
if (MACHINE_IS_VM)
- dump_method = IPL_METHOD_CCW_VM;
+ dump_method = DUMP_METHOD_CCW_VM;
else
- dump_method = IPL_METHOD_CCW_CIO;
+ dump_method = DUMP_METHOD_CCW_CIO;
break;
- case IPL_TYPE_FCP:
- dump_method = IPL_METHOD_FCP_RW_DIAG;
+ case DUMP_TYPE_FCP:
+ dump_method = DUMP_METHOD_FCP_DIAG;
break;
default:
- dump_method = IPL_METHOD_NONE;
+ dump_method = DUMP_METHOD_NONE;
}
dump_type = type;
return 0;
@@ -602,7 +667,7 @@ static int dump_set_type(enum ipl_type type)
static ssize_t dump_type_show(struct subsystem *subsys, char *page)
{
- return sprintf(page, "%s\n", ipl_type_str(dump_type));
+ return sprintf(page, "%s\n", dump_type_str(dump_type));
}
static ssize_t dump_type_store(struct subsystem *subsys, const char *buf,
@@ -610,12 +675,12 @@ static ssize_t dump_type_store(struct subsystem *subsys, const char *buf,
{
int rc = -EINVAL;
- if (strncmp(buf, IPL_NONE_STR, strlen(IPL_NONE_STR)) == 0)
- rc = dump_set_type(IPL_TYPE_NONE);
- else if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
- rc = dump_set_type(IPL_TYPE_CCW);
- else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
- rc = dump_set_type(IPL_TYPE_FCP);
+ if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
+ rc = dump_set_type(DUMP_TYPE_NONE);
+ else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
+ rc = dump_set_type(DUMP_TYPE_CCW);
+ else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
+ rc = dump_set_type(DUMP_TYPE_FCP);
return (rc != 0) ? rc : len;
}
@@ -664,14 +729,14 @@ void do_reipl(void)
char loadparm[LOADPARM_LEN + 1];
switch (reipl_method) {
- case IPL_METHOD_CCW_CIO:
+ case REIPL_METHOD_CCW_CIO:
devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
- if (ipl_get_type() == IPL_TYPE_CCW && devid.devno == ipl_devno)
+ if (ipl_info.type == IPL_TYPE_CCW && devid.devno == ipl_devno)
diag308(DIAG308_IPL, NULL);
devid.ssid = 0;
reipl_ccw_dev(&devid);
break;
- case IPL_METHOD_CCW_VM:
+ case REIPL_METHOD_CCW_VM:
reipl_get_ascii_loadparm(loadparm);
if (strlen(loadparm) == 0)
sprintf(buf, "IPL %X",
@@ -681,30 +746,32 @@ void do_reipl(void)
reipl_block_ccw->ipl_info.ccw.devno, loadparm);
__cpcmd(buf, NULL, 0, NULL);
break;
- case IPL_METHOD_CCW_DIAG:
+ case REIPL_METHOD_CCW_DIAG:
diag308(DIAG308_SET, reipl_block_ccw);
diag308(DIAG308_IPL, NULL);
break;
- case IPL_METHOD_FCP_RW_DIAG:
+ case REIPL_METHOD_FCP_RW_DIAG:
diag308(DIAG308_SET, reipl_block_fcp);
diag308(DIAG308_IPL, NULL);
break;
- case IPL_METHOD_FCP_RO_DIAG:
+ case REIPL_METHOD_FCP_RO_DIAG:
diag308(DIAG308_IPL, NULL);
break;
- case IPL_METHOD_FCP_RO_VM:
+ case REIPL_METHOD_FCP_RO_VM:
__cpcmd("IPL", NULL, 0, NULL);
break;
- case IPL_METHOD_NSS:
+ case REIPL_METHOD_NSS:
sprintf(buf, "IPL %s", reipl_nss_name);
__cpcmd(buf, NULL, 0, NULL);
break;
- case IPL_METHOD_NONE:
- default:
+ case REIPL_METHOD_DEFAULT:
if (MACHINE_IS_VM)
__cpcmd("IPL", NULL, 0, NULL);
diag308(DIAG308_IPL, NULL);
break;
+ case REIPL_METHOD_FCP_DUMP:
+ default:
+ break;
}
signal_processor(smp_processor_id(), sigp_stop_and_store_status);
}
@@ -715,28 +782,28 @@ static void do_dump(void)
static char buf[100];
switch (dump_method) {
- case IPL_METHOD_CCW_CIO:
+ case DUMP_METHOD_CCW_CIO:
smp_send_stop();
devid.devno = dump_block_ccw->ipl_info.ccw.devno;
devid.ssid = 0;
reipl_ccw_dev(&devid);
break;
- case IPL_METHOD_CCW_VM:
+ case DUMP_METHOD_CCW_VM:
smp_send_stop();
sprintf(buf, "STORE STATUS");
__cpcmd(buf, NULL, 0, NULL);
sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
__cpcmd(buf, NULL, 0, NULL);
break;
- case IPL_METHOD_CCW_DIAG:
+ case DUMP_METHOD_CCW_DIAG:
diag308(DIAG308_SET, dump_block_ccw);
diag308(DIAG308_DUMP, NULL);
break;
- case IPL_METHOD_FCP_RW_DIAG:
+ case DUMP_METHOD_FCP_DIAG:
diag308(DIAG308_SET, dump_block_fcp);
diag308(DIAG308_DUMP, NULL);
break;
- case IPL_METHOD_NONE:
+ case DUMP_METHOD_NONE:
default:
return;
}
@@ -777,12 +844,13 @@ static int __init ipl_init(void)
rc = firmware_register(&ipl_subsys);
if (rc)
return rc;
- switch (ipl_get_type()) {
+ switch (ipl_info.type) {
case IPL_TYPE_CCW:
rc = sysfs_create_group(&ipl_subsys.kset.kobj,
&ipl_ccw_attr_group);
break;
case IPL_TYPE_FCP:
+ case IPL_TYPE_FCP_DUMP:
rc = ipl_register_fcp_files();
break;
case IPL_TYPE_NSS:
@@ -852,7 +920,7 @@ static int __init reipl_ccw_init(void)
/* FIXME: check for diag308_set_works when enabling diag ccw reipl */
if (!MACHINE_IS_VM)
sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
- if (ipl_get_type() == IPL_TYPE_CCW)
+ if (ipl_info.type == IPL_TYPE_CCW)
reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
reipl_capabilities |= IPL_TYPE_CCW;
return 0;
@@ -862,9 +930,9 @@ static int __init reipl_fcp_init(void)
{
int rc;
- if ((!diag308_set_works) && (ipl_get_type() != IPL_TYPE_FCP))
+ if ((!diag308_set_works) && (ipl_info.type != IPL_TYPE_FCP))
return 0;
- if ((!diag308_set_works) && (ipl_get_type() == IPL_TYPE_FCP))
+ if ((!diag308_set_works) && (ipl_info.type == IPL_TYPE_FCP))
make_attrs_ro(reipl_fcp_attrs);
reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
@@ -875,7 +943,7 @@ static int __init reipl_fcp_init(void)
free_page((unsigned long)reipl_block_fcp);
return rc;
}
- if (ipl_get_type() == IPL_TYPE_FCP) {
+ if (ipl_info.type == IPL_TYPE_FCP) {
memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
} else {
reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
@@ -909,7 +977,7 @@ static int __init reipl_init(void)
rc = reipl_nss_init();
if (rc)
return rc;
- rc = reipl_set_type(ipl_get_type());
+ rc = reipl_set_type(ipl_info.type);
if (rc)
return rc;
return 0;
@@ -931,7 +999,7 @@ static int __init dump_ccw_init(void)
dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
- dump_capabilities |= IPL_TYPE_CCW;
+ dump_capabilities |= DUMP_TYPE_CCW;
return 0;
}
@@ -956,7 +1024,7 @@ static int __init dump_fcp_init(void)
dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
- dump_capabilities |= IPL_TYPE_FCP;
+ dump_capabilities |= DUMP_TYPE_FCP;
return 0;
}
@@ -995,7 +1063,7 @@ static int __init dump_init(void)
rc = dump_fcp_init();
if (rc)
return rc;
- dump_set_type(IPL_TYPE_NONE);
+ dump_set_type(DUMP_TYPE_NONE);
return 0;
}
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 863c8d08c02..3dfd0985861 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -285,6 +285,26 @@ static void __init conmode_default(void)
}
}
+#if defined(CONFIG_ZFCPDUMP) || defined(CONFIG_ZFCPDUMP_MODULE)
+static void __init setup_zfcpdump(unsigned int console_devno)
+{
+ static char str[64];
+
+ if (ipl_info.type != IPL_TYPE_FCP_DUMP)
+ return;
+ if (console_devno != -1)
+ sprintf(str, "cio_ignore=all,!0.0.%04x,!0.0.%04x",
+ ipl_info.data.fcp.dev_id.devno, console_devno);
+ else
+ sprintf(str, "cio_ignore=all,!0.0.%04x",
+ ipl_info.data.fcp.dev_id.devno);
+ strcat(COMMAND_LINE, str);
+ console_loglevel = 2;
+}
+#else
+static inline void setup_zfcpdump(unsigned int console_devno) {}
+#endif /* CONFIG_ZFCPDUMP */
+
#ifdef CONFIG_SMP
void (*_machine_restart)(char *command) = machine_restart_smp;
void (*_machine_halt)(void) = machine_halt_smp;
@@ -586,13 +606,20 @@ setup_resources(void)
}
}
+unsigned long real_memory_size;
+EXPORT_SYMBOL_GPL(real_memory_size);
+
static void __init setup_memory_end(void)
{
- unsigned long real_size, memory_size;
+ unsigned long memory_size;
unsigned long max_mem, max_phys;
int i;
- memory_size = real_size = 0;
+#if defined(CONFIG_ZFCPDUMP) || defined(CONFIG_ZFCPDUMP_MODULE)
+ if (ipl_info.type == IPL_TYPE_FCP_DUMP)
+ memory_end = ZFCPDUMP_HSA_SIZE;
+#endif
+ memory_size = 0;
max_phys = VMALLOC_END_INIT - VMALLOC_MIN_SIZE;
memory_end &= PAGE_MASK;
@@ -601,7 +628,8 @@ static void __init setup_memory_end(void)
for (i = 0; i < MEMORY_CHUNKS; i++) {
struct mem_chunk *chunk = &memory_chunk[i];
- real_size = max(real_size, chunk->addr + chunk->size);
+ real_memory_size = max(real_memory_size,
+ chunk->addr + chunk->size);
if (chunk->addr >= max_mem) {
memset(chunk, 0, sizeof(*chunk));
continue;
@@ -765,6 +793,7 @@ setup_arch(char **cmdline_p)
parse_early_param();
+ setup_ipl_info();
setup_memory_end();
setup_addressing_mode();
setup_memory();
@@ -782,6 +811,9 @@ setup_arch(char **cmdline_p)
/* Setup default console */
conmode_default();
+
+ /* Setup zfcpdump support */
+ setup_zfcpdump(console_devno);
}
void print_cpu_info(struct cpuinfo_S390 *cpuinfo)
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 97764f710bb..7c0143fdf71 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -31,6 +31,7 @@
#include <linux/interrupt.h>
#include <linux/cpu.h>
#include <linux/timex.h>
+#include <linux/bootmem.h>
#include <asm/ipl.h>
#include <asm/setup.h>
#include <asm/sigp.h>
@@ -40,6 +41,7 @@
#include <asm/cpcmd.h>
#include <asm/tlbflush.h>
#include <asm/timer.h>
+#include <asm/lowcore.h>
extern volatile int __cpu_logical_map[];
@@ -395,6 +397,65 @@ void smp_ctl_clear_bit(int cr, int bit)
on_each_cpu(smp_ctl_bit_callback, &parms, 0, 1);
}
+#if defined(CONFIG_ZFCPDUMP) || defined(CONFIG_ZFCPDUMP_MODULE)
+
+/*
+ * zfcpdump_prefix_array holds prefix registers for the following scenario:
+ * 64 bit zfcpdump kernel and 31 bit kernel which is to be dumped. We have to
+ * save its prefix registers, since they get lost, when switching from 31 bit
+ * to 64 bit.
+ */
+unsigned int zfcpdump_prefix_array[NR_CPUS + 1] \
+ __attribute__((__section__(".data")));
+
+static void __init smp_get_save_areas(void)
+{
+ unsigned int cpu, cpu_num, rc;
+ __u16 boot_cpu_addr;
+
+ if (ipl_info.type != IPL_TYPE_FCP_DUMP)
+ return;
+ boot_cpu_addr = S390_lowcore.cpu_data.cpu_addr;
+ cpu_num = 1;
+ for (cpu = 0; cpu <= 65535; cpu++) {
+ if ((u16) cpu == boot_cpu_addr)
+ continue;
+ __cpu_logical_map[1] = (__u16) cpu;
+ if (signal_processor(1, sigp_sense) == sigp_not_operational)
+ continue;
+ if (cpu_num >= NR_CPUS) {
+ printk("WARNING: Registers for cpu %i are not "
+ "saved, since dump kernel was compiled with"
+ "NR_CPUS=%i!\n", cpu_num, NR_CPUS);
+ continue;
+ }
+ zfcpdump_save_areas[cpu_num] =
+ alloc_bootmem(sizeof(union save_area));
+ while (1) {
+ rc = signal_processor(1, sigp_stop_and_store_status);
+ if (rc != sigp_busy)
+ break;
+ cpu_relax();
+ }
+ memcpy(zfcpdump_save_areas[cpu_num],
+ (void *)(unsigned long) store_prefix() +
+ SAVE_AREA_BASE, SAVE_AREA_SIZE);
+#ifdef __s390x__
+ /* copy original prefix register */
+ zfcpdump_save_areas[cpu_num]->s390x.pref_reg =
+ zfcpdump_prefix_array[cpu_num];
+#endif
+ cpu_num++;
+ }
+}
+
+union save_area *zfcpdump_save_areas[NR_CPUS + 1];
+EXPORT_SYMBOL_GPL(zfcpdump_save_areas);
+
+#else
+#define smp_get_save_areas() do { } while (0)
+#endif
+
/*
* Lets check how many CPUs we have.
*/
@@ -589,6 +650,7 @@ void __init smp_setup_cpu_possible_map(void)
{
unsigned int phy_cpus, pos_cpus, cpu;
+ smp_get_save_areas();
phy_cpus = smp_count_cpus();
pos_cpus = min(phy_cpus + additional_cpus, (unsigned int) NR_CPUS);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-06 22:35:32 +0000