These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / arch / s390 / kernel / ipl.c

diff --git a/kernel/arch/s390/kernel/ipl.c b/kernel/arch/s390/kernel/ipl.c
index 52fbef9..b1f0a90 100644 (file)
--- a/kernel/arch/s390/kernel/ipl.c
+++ b/kernel/arch/s390/kernel/ipl.c
@@ -17,6 +17,7 @@
 #include <linux/gfp.h>
 #include <linux/crash_dump.h>
 #include <linux/debug_locks.h>
+#include <asm/diag.h>
 #include <asm/ipl.h>
 #include <asm/smp.h>
 #include <asm/setup.h>
@@ -120,6 +121,7 @@ static char *dump_type_str(enum dump_type type)
  * Must be in data section since the bss section
  * is not cleared when these are accessed.
  */
+static u8 ipl_ssid __attribute__((__section__(".data"))) = 0;
 static u16 ipl_devno __attribute__((__section__(".data"))) = 0;
 u32 ipl_flags __attribute__((__section__(".data"))) = 0;
 
@@ -165,7 +167,7 @@ static struct ipl_parameter_block *dump_block_ccw;
 
 static struct sclp_ipl_info sclp_ipl_info;
 
-int diag308(unsigned long subcode, void *addr)
+static inline int __diag308(unsigned long subcode, void *addr)
 {
        register unsigned long _addr asm("0") = (unsigned long) addr;
        register unsigned long _rc asm("1") = 0;
@@ -178,6 +180,12 @@ int diag308(unsigned long subcode, void *addr)
                : "d" (subcode) : "cc", "memory");
        return _rc;
 }
+
+int diag308(unsigned long subcode, void *addr)
+{
+       diag_stat_inc(DIAG_STAT_X308);
+       return __diag308(subcode, addr);
+}
 EXPORT_SYMBOL_GPL(diag308);
 
 /* SYSFS */
@@ -190,6 +198,33 @@ static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj,        \
        return snprintf(page, PAGE_SIZE, _format, ##args);              \
 }
 
+#define IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk)                        \
+static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,   \
+               struct kobj_attribute *attr,                            \
+               const char *buf, size_t len)                            \
+{                                                                      \
+       unsigned long long ssid, devno;                                 \
+                                                                       \
+       if (sscanf(buf, "0.%llx.%llx\n", &ssid, &devno) != 2)           \
+               return -EINVAL;                                         \
+                                                                       \
+       if (ssid > __MAX_SSID || devno > __MAX_SUBCHANNEL)              \
+               return -EINVAL;                                         \
+                                                                       \
+       _ipl_blk.ssid = ssid;                                           \
+       _ipl_blk.devno = devno;                                         \
+       return len;                                                     \
+}
+
+#define DEFINE_IPL_CCW_ATTR_RW(_prefix, _name, _ipl_blk)               \
+IPL_ATTR_SHOW_FN(_prefix, _name, "0.%x.%04x\n",                                \
+                _ipl_blk.ssid, _ipl_blk.devno);                        \
+IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk);                       \
+static struct kobj_attribute sys_##_prefix##_##_name##_attr =          \
+       __ATTR(_name, (S_IRUGO | S_IWUSR),                              \
+              sys_##_prefix##_##_name##_show,                          \
+              sys_##_prefix##_##_name##_store)                         \
+
 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value)            \
 IPL_ATTR_SHOW_FN(_prefix, _name, _format, _value)                      \
 static struct kobj_attribute sys_##_prefix##_##_name##_attr =          \
@@ -388,7 +423,7 @@ static ssize_t sys_ipl_device_show(struct kobject *kobj,
 
        switch (ipl_info.type) {
        case IPL_TYPE_CCW:
-               return sprintf(page, "0.0.%04x\n", ipl_devno);
+               return sprintf(page, "0.%x.%04x\n", ipl_ssid, ipl_devno);
        case IPL_TYPE_FCP:
        case IPL_TYPE_FCP_DUMP:
                return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
@@ -680,21 +715,14 @@ static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
                                       struct bin_attribute *attr,
                                       char *buf, loff_t off, size_t count)
 {
+       size_t scpdata_len = count;
        size_t padding;
-       size_t scpdata_len;
-
-       if (off < 0)
-               return -EINVAL;
 
-       if (off >= DIAG308_SCPDATA_SIZE)
-               return -ENOSPC;
 
-       if (count > DIAG308_SCPDATA_SIZE - off)
-               count = DIAG308_SCPDATA_SIZE - off;
-
-       memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf + off, count);
-       scpdata_len = off + count;
+       if (off)
+               return -EINVAL;
 
+       memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf, count);
        if (scpdata_len % 8) {
                padding = 8 - (scpdata_len % 8);
                memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
@@ -710,7 +738,7 @@ static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
 }
 static struct bin_attribute sys_reipl_fcp_scp_data_attr =
        __BIN_ATTR(scp_data, (S_IRUGO | S_IWUSR), reipl_fcp_scpdata_read,
-                  reipl_fcp_scpdata_write, PAGE_SIZE);
+                  reipl_fcp_scpdata_write, DIAG308_SCPDATA_SIZE);
 
 static struct bin_attribute *reipl_fcp_bin_attrs[] = {
        &sys_reipl_fcp_scp_data_attr,
@@ -807,9 +835,7 @@ static struct attribute_group reipl_fcp_attr_group = {
 };
 
 /* CCW reipl device attributes */
-
-DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
-       reipl_block_ccw->ipl_info.ccw.devno);
+DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ipl_info.ccw);
 
 /* NSS wrapper */
 static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
@@ -1049,8 +1075,8 @@ static void __reipl_run(void *unused)
 
        switch (reipl_method) {
        case REIPL_METHOD_CCW_CIO:
+               devid.ssid  = reipl_block_ccw->ipl_info.ccw.ssid;
                devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
-               devid.ssid  = 0;
                reipl_ccw_dev(&devid);
                break;
        case REIPL_METHOD_CCW_VM:
@@ -1185,6 +1211,7 @@ static int __init reipl_ccw_init(void)
 
        reipl_block_ccw_init(reipl_block_ccw);
        if (ipl_info.type == IPL_TYPE_CCW) {
+               reipl_block_ccw->ipl_info.ccw.ssid = ipl_ssid;
                reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
                reipl_block_ccw_fill_parms(reipl_block_ccw);
        }
@@ -1329,9 +1356,7 @@ static struct attribute_group dump_fcp_attr_group = {
 };
 
 /* CCW dump device attributes */
-
-DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
-                  dump_block_ccw->ipl_info.ccw.devno);
+DEFINE_IPL_CCW_ATTR_RW(dump_ccw, device, dump_block_ccw->ipl_info.ccw);
 
 static struct attribute *dump_ccw_attrs[] = {
        &sys_dump_ccw_device_attr.attr,
@@ -1411,8 +1436,8 @@ static void __dump_run(void *unused)
 
        switch (dump_method) {
        case DUMP_METHOD_CCW_CIO:
+               devid.ssid  = dump_block_ccw->ipl_info.ccw.ssid;
                devid.devno = dump_block_ccw->ipl_info.ccw.devno;
-               devid.ssid  = 0;
                reipl_ccw_dev(&devid);
                break;
        case DUMP_METHOD_CCW_VM:
@@ -1932,14 +1957,14 @@ void __init setup_ipl(void)
        ipl_info.type = get_ipl_type();
        switch (ipl_info.type) {
        case IPL_TYPE_CCW:
+               ipl_info.data.ccw.dev_id.ssid = ipl_ssid;
                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.ssid = 0;
                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;
@@ -1971,6 +1996,7 @@ void __init ipl_save_parameters(void)
        if (cio_get_iplinfo(&iplinfo))
                return;
 
+       ipl_ssid = iplinfo.ssid;
        ipl_devno = iplinfo.devno;
        ipl_flags |= IPL_DEVNO_VALID;
        if (!iplinfo.is_qdio)