---

yaml
---
r: 42019
b: refs/heads/master
c: 03a4d20
h: refs/heads/master
i:
  42017: eafd413
  42015: c1feeff
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: f7675ad791df4bec2b9d21bcc0f846320f0a921b
+refs/heads/master: 03a4d2087644f5477d9a9742e75a329f23b279e6

trunk/arch/s390/kernel/ipl.c

@@ -13,12 +13,20 @@
 #include <linux/device.h>
 #include <linux/delay.h>
 #include <linux/reboot.h>
+#include <linux/ctype.h>
 #include <asm/smp.h>
 #include <asm/setup.h>
 #include <asm/cpcmd.h>
 #include <asm/cio.h>
+#include <asm/ebcdic.h>
 
 #define IPL_PARM_BLOCK_VERSION 0
+#define LOADPARM_LEN 8
+
+extern char s390_readinfo_sccb[];
+#define SCCB_VALID (*((__u16*)&s390_readinfo_sccb[6]) == 0x0010)
+#define SCCB_LOADPARM (&s390_readinfo_sccb[24])
+#define SCCB_FLAG (s390_readinfo_sccb[91])
 
 enum ipl_type {
 	IPL_TYPE_NONE	 = 1,
@@ -289,9 +297,25 @@ static struct attribute_group ipl_fcp_attr_group = {
 
 /* CCW ipl device attributes */
 
+static ssize_t ipl_ccw_loadparm_show(struct subsystem *subsys, char *page)
+{
+	char loadparm[LOADPARM_LEN + 1] = {};
+
+	if (!SCCB_VALID)
+		return sprintf(page, "#unknown#\n");
+	memcpy(loadparm, SCCB_LOADPARM, LOADPARM_LEN);
+	EBCASC(loadparm, LOADPARM_LEN);
+	strstrip(loadparm);
+	return sprintf(page, "%s\n", loadparm);
+}
+
+static struct subsys_attribute sys_ipl_ccw_loadparm_attr =
+	__ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
+
 static struct attribute *ipl_ccw_attrs[] = {
 	&sys_ipl_type_attr.attr,
 	&sys_ipl_device_attr.attr,
+	&sys_ipl_ccw_loadparm_attr.attr,
 	NULL,
 };
 
@@ -348,8 +372,57 @@ static struct attribute_group reipl_fcp_attr_group = {
 DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
 	reipl_block_ccw->ipl_info.ccw.devno);
 
+static void reipl_get_ascii_loadparm(char *loadparm)
+{
+	memcpy(loadparm, &reipl_block_ccw->ipl_info.ccw.load_param,
+	       LOADPARM_LEN);
+	EBCASC(loadparm, LOADPARM_LEN);
+	loadparm[LOADPARM_LEN] = 0;
+	strstrip(loadparm);
+}
+
+static ssize_t reipl_ccw_loadparm_show(struct subsystem *subsys, char *page)
+{
+	char buf[LOADPARM_LEN + 1];
+
+	reipl_get_ascii_loadparm(buf);
+	return sprintf(page, "%s\n", buf);
+}
+
+static ssize_t reipl_ccw_loadparm_store(struct subsystem *subsys,
+					const char *buf, size_t len)
+{
+	int i, lp_len;
+
+	/* ignore trailing newline */
+	lp_len = len;
+	if ((len > 0) && (buf[len - 1] == '\n'))
+		lp_len--;
+	/* loadparm can have max 8 characters and must not start with a blank */
+	if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
+		return -EINVAL;
+	/* loadparm can only contain "a-z,A-Z,0-9,SP,." */
+	for (i = 0; i < lp_len; i++) {
+		if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
+		    (buf[i] == '.'))
+			continue;
+		return -EINVAL;
+	}
+	/* initialize loadparm with blanks */
+	memset(&reipl_block_ccw->ipl_info.ccw.load_param, ' ', LOADPARM_LEN);
+	/* copy and convert to ebcdic */
+	memcpy(&reipl_block_ccw->ipl_info.ccw.load_param, buf, lp_len);
+	ASCEBC(reipl_block_ccw->ipl_info.ccw.load_param, LOADPARM_LEN);
+	return len;
+}
+
+static struct subsys_attribute sys_reipl_ccw_loadparm_attr =
+	__ATTR(loadparm, 0644, reipl_ccw_loadparm_show,
+	       reipl_ccw_loadparm_store);
+
 static struct attribute *reipl_ccw_attrs[] = {
 	&sys_reipl_ccw_device_attr.attr,
+	&sys_reipl_ccw_loadparm_attr.attr,
 	NULL,
 };
 
@@ -571,11 +644,14 @@ void do_reipl(void)
 {
 	struct ccw_dev_id devid;
 	static char buf[100];
+	char loadparm[LOADPARM_LEN + 1];
 
 	switch (reipl_type) {
 	case IPL_TYPE_CCW:
+		reipl_get_ascii_loadparm(loadparm);
 		printk(KERN_EMERG "reboot on ccw device: 0.0.%04x\n",
 			reipl_block_ccw->ipl_info.ccw.devno);
+		printk(KERN_EMERG "loadparm = '%s'\n", loadparm);
 		break;
 	case IPL_TYPE_FCP:
 		printk(KERN_EMERG "reboot on fcp device:\n");
@@ -592,7 +668,12 @@ void do_reipl(void)
 		reipl_ccw_dev(&devid);
 		break;
 	case IPL_METHOD_CCW_VM:
-		sprintf(buf, "IPL %X", reipl_block_ccw->ipl_info.ccw.devno);
+		if (strlen(loadparm) == 0)
+			sprintf(buf, "IPL %X",
+				reipl_block_ccw->ipl_info.ccw.devno);
+		else
+			sprintf(buf, "IPL %X LOADPARM '%s'",
+				reipl_block_ccw->ipl_info.ccw.devno, loadparm);
 		cpcmd(buf, NULL, 0, NULL);
 		break;
 	case IPL_METHOD_CCW_DIAG:
@@ -746,6 +827,17 @@ static int __init reipl_ccw_init(void)
 	reipl_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
 	reipl_block_ccw->hdr.blk0_len = sizeof(reipl_block_ccw->ipl_info.ccw);
 	reipl_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
+	/* check if read scp info worked and set loadparm */
+	if (SCCB_VALID)
+		memcpy(reipl_block_ccw->ipl_info.ccw.load_param,
+		       SCCB_LOADPARM, LOADPARM_LEN);
+	else
+		/* read scp info failed: set empty loadparm (EBCDIC blanks) */
+		memset(reipl_block_ccw->ipl_info.ccw.load_param, 0x40,
+		       LOADPARM_LEN);
+	/* 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)
 		reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
 	reipl_capabilities |= IPL_TYPE_CCW;
@@ -827,13 +919,11 @@ static int __init dump_ccw_init(void)
 	return 0;
 }
 
-extern char s390_readinfo_sccb[];
-
 static int __init dump_fcp_init(void)
 {
 	int rc;
 
-	if(!(s390_readinfo_sccb[91] & 0x2))
+	if(!(SCCB_FLAG & 0x2) || !SCCB_VALID)
 		return 0; /* LDIPL DUMP is not installed */
 	if (!diag308_set_works)
 		return 0;