---

yaml
---
r: 46179
b: refs/heads/master
c: fe355b7
h: refs/heads/master
i:
  46177: 888bfcb
  46175: 2b93910
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 1b2782948997cf5a0d1747de13d43ba7dfa7c543
+refs/heads/master: fe355b7f1c7400cbb71762a1237461be03f88265

trunk/arch/s390/kernel/head31.S

@@ -51,20 +51,12 @@ startup_continue:
 	st	%r15,__LC_KERNEL_STACK	# set end of kernel stack
 	ahi	%r15,-96
 	xc	__SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15) # clear backchain
-
-	l	%r14,.Lipl_save_parameters-.LPG1(%r13)
-	basr	%r14,%r14
 #
-# clear bss memory
+# Save ipl parameters, clear bss memory, initialize storage key for kernel pages,
+# and create a kernel NSS if the SAVESYS= parm is defined
 #
-	l	%r2,.Lbss_bgn-.LPG1(%r13) # start of bss
-	l	%r3,.Lbss_end-.LPG1(%r13) # end of bss
-	sr	%r3,%r2			# length of bss
-	sr	%r4,%r4
-	sr	%r5,%r5			# set src,length and pad to zero
-	sr	%r0,%r0
-	mvcle	%r2,%r4,0		# clear mem
-	jo	.-4			# branch back, if not finish
+	l	%r14,.Lstartup_init-.LPG1(%r13)
+	basr	%r14,%r14
 
 	l	%r2,.Lrcp-.LPG1(%r13)	# Read SCP forced command word
 .Lservicecall:
@@ -125,10 +117,10 @@ startup_continue:
 	b	.Lfchunk-.LPG1(%r13)
 
 	.align 4
-.Lipl_save_parameters:
-	.long	ipl_save_parameters
 .Linittu:
 	.long	init_thread_union
+.Lstartup_init:
+	.long	startup_init
 .Lpmask:
 	.byte	0
 	.align	8
@@ -206,20 +198,6 @@ startup_continue:
 	jl	.Lloop
 .Ldonemem:
 	l	%r12,.Lmflags-.LPG1(%r13) # get address of machine_flags
-#
-# find out if we are running under VM
-#
-	stidp	__LC_CPUID		# store cpuid
-	tm	__LC_CPUID,0xff		# running under VM ?
-	bno	.Lnovm-.LPG1(%r13)
-	oi	3(%r12),1		# set VM flag
-.Lnovm:
-	lh	%r0,__LC_CPUID+4	# get cpu version
-	chi	%r0,0x7490		# running on a P/390 ?
-	bne	.Lnop390-.LPG1(%r13)
-	oi	3(%r12),4		# set P/390 flag
-.Lnop390:
-
 #
 # find out if we have an IEEE fpu
 #

trunk/arch/s390/kernel/head64.S

@@ -58,18 +58,11 @@ startup_continue:
 	stg	%r15,__LC_KERNEL_STACK	# set end of kernel stack
 	aghi	%r15,-160
 	xc	__SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15) # clear backchain
-
-	brasl	%r14,ipl_save_parameters
 #
-# clear bss memory
+# Save ipl parameters, clear bss memory, initialize storage key for kernel pages,
+# and create a kernel NSS if the SAVESYS= parm is defined
 #
-	larl	%r2,__bss_start 	# start of bss segment
-	larl	%r3,_end		# end of bss segment
-	sgr	%r3,%r2 		# length of bss
-	sgr	%r4,%r4 		#
-	sgr	%r5,%r5 		# set src,length and pad to zero
-	mvcle	%r2,%r4,0		# clear mem
-	jo	.-4			# branch back, if not finish
+	brasl	%r14,startup_init
 					# set program check new psw mask
 	mvc	__LC_PGM_NEW_PSW(8),.Lpcmsk-.LPG1(%r13)
 	larl	%r1,.Lslowmemdetect	# set program check address
@@ -78,6 +71,10 @@ startup_continue:
 	diag	%r0,%r1,0x260		# get memory size of virtual machine
 	cgr	%r0,%r1			# different? -> old detection routine
 	jne	.Lslowmemdetect
+	larl	%r3,ipl_flags
+	llgt	%r3,0(%r3)
+	chi	%r3,4			# ipled from an kernel NSS
+	je	.Lslowmemdetect
 	aghi	%r1,1			# size is one more than end
 	larl	%r2,memory_chunk
 	stg	%r1,8(%r2)		# store size of chunk
@@ -225,19 +222,6 @@ startup_continue:
 .Ldonemem:
 
 	larl	%r12,machine_flags
-#
-# find out if we are running under VM
-#
-	stidp	__LC_CPUID		# store cpuid
-	tm	__LC_CPUID,0xff 	# running under VM ?
-	bno	0f-.LPG1(%r13)
-	oi	7(%r12),1		# set VM flag
-0:	lh	%r0,__LC_CPUID+4	# get cpu version
-	chi	%r0,0x7490		# running on a P/390 ?
-	bne	1f-.LPG1(%r13)
-	oi	7(%r12),4		# set P/390 flag
-1:
-
 #
 # find out if we have the MVPG instruction
 #

trunk/arch/s390/kernel/ipl.c

@@ -34,12 +34,14 @@ enum ipl_type {
 	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"
 
 static char *ipl_type_str(enum ipl_type type)
 {
@@ -50,6 +52,8 @@ static char *ipl_type_str(enum ipl_type type)
 		return IPL_CCW_STR;
 	case IPL_TYPE_FCP:
 		return IPL_FCP_STR;
+	case IPL_TYPE_NSS:
+		return IPL_NSS_STR;
 	case IPL_TYPE_UNKNOWN:
 	default:
 		return IPL_UNKNOWN_STR;
@@ -64,6 +68,7 @@ enum ipl_method {
 	IPL_METHOD_FCP_RO_DIAG,
 	IPL_METHOD_FCP_RW_DIAG,
 	IPL_METHOD_FCP_RO_VM,
+	IPL_METHOD_NSS,
 };
 
 enum shutdown_action {
@@ -114,11 +119,14 @@ enum diag308_rc {
 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 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;
@@ -173,6 +181,24 @@ static struct subsys_attribute sys_##_prefix##_##_name##_attr =		\
 			sys_##_prefix##_##_name##_show,			\
 			sys_##_prefix##_##_name##_store);
 
+#define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
+static ssize_t sys_##_prefix##_##_name##_show(struct subsystem *subsys,	\
+		char *page)						\
+{									\
+	return sprintf(page, _fmt_out, _value);				\
+}									\
+static ssize_t sys_##_prefix##_##_name##_store(struct subsystem *subsys,\
+		const char *buf, size_t len)				\
+{									\
+	if (sscanf(buf, _fmt_in, _value) != 1)				\
+		return -EINVAL;						\
+	return len;							\
+}									\
+static struct subsys_attribute sys_##_prefix##_##_name##_attr =		\
+	__ATTR(_name,(S_IRUGO | S_IWUSR),				\
+			sys_##_prefix##_##_name##_show,			\
+			sys_##_prefix##_##_name##_store);
+
 static void make_attrs_ro(struct attribute **attrs)
 {
 	while (*attrs) {
@@ -189,6 +215,8 @@ static enum ipl_type ipl_get_type(void)
 {
 	struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
 
+	if (ipl_flags & IPL_NSS_VALID)
+		return IPL_TYPE_NSS;
 	if (!(ipl_flags & IPL_DEVNO_VALID))
 		return IPL_TYPE_UNKNOWN;
 	if (!(ipl_flags & IPL_PARMBLOCK_VALID))
@@ -324,6 +352,20 @@ static struct attribute_group ipl_ccw_attr_group = {
 	.attrs = ipl_ccw_attrs,
 };
 
+/* NSS ipl device attributes */
+
+DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
+
+static struct attribute *ipl_nss_attrs[] = {
+	&sys_ipl_type_attr.attr,
+	&sys_ipl_nss_name_attr.attr,
+	NULL,
+};
+
+static struct attribute_group ipl_nss_attr_group = {
+	.attrs = ipl_nss_attrs,
+};
+
 /* UNKNOWN ipl device attributes */
 
 static struct attribute *ipl_unknown_attrs[] = {
@@ -432,6 +474,21 @@ static struct attribute_group reipl_ccw_attr_group = {
 	.attrs = reipl_ccw_attrs,
 };
 
+
+/* NSS reipl device attributes */
+
+DEFINE_IPL_ATTR_STR_RW(reipl_nss, name, "%s\n", "%s\n", reipl_nss_name);
+
+static struct attribute *reipl_nss_attrs[] = {
+	&sys_reipl_nss_name_attr.attr,
+	NULL,
+};
+
+static struct attribute_group reipl_nss_attr_group = {
+	.name  = IPL_NSS_STR,
+	.attrs = reipl_nss_attrs,
+};
+
 /* reipl type */
 
 static int reipl_set_type(enum ipl_type type)
@@ -454,6 +511,9 @@ static int reipl_set_type(enum ipl_type type)
 		else
 			reipl_method = IPL_METHOD_FCP_RO_DIAG;
 		break;
+	case IPL_TYPE_NSS:
+		reipl_method = IPL_METHOD_NSS;
+		break;
 	default:
 		reipl_method = IPL_METHOD_NONE;
 	}
@@ -475,6 +535,8 @@ static ssize_t reipl_type_store(struct subsystem *subsys, const char *buf,
 		rc = reipl_set_type(IPL_TYPE_CCW);
 	else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
 		rc = reipl_set_type(IPL_TYPE_FCP);
+	else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
+		rc = reipl_set_type(IPL_TYPE_NSS);
 	return (rc != 0) ? rc : len;
 }
 
@@ -647,6 +709,10 @@ void do_reipl(void)
 	case IPL_METHOD_FCP_RO_VM:
 		__cpcmd("IPL", NULL, 0, NULL);
 		break;
+	case IPL_METHOD_NSS:
+		sprintf(buf, "IPL %s", reipl_nss_name);
+		__cpcmd(buf, NULL, 0, NULL);
+		break;
 	case IPL_METHOD_NONE:
 	default:
 		if (MACHINE_IS_VM)
@@ -733,6 +799,10 @@ static int __init ipl_init(void)
 	case IPL_TYPE_FCP:
 		rc = ipl_register_fcp_files();
 		break;
+	case IPL_TYPE_NSS:
+		rc = sysfs_create_group(&ipl_subsys.kset.kobj,
+					&ipl_nss_attr_group);
+		break;
 	default:
 		rc = sysfs_create_group(&ipl_subsys.kset.kobj,
 					&ipl_unknown_attr_group);
@@ -755,6 +825,20 @@ static void __init reipl_probe(void)
 	free_page((unsigned long)buffer);
 }
 
+static int __init reipl_nss_init(void)
+{
+	int rc;
+
+	if (!MACHINE_IS_VM)
+		return 0;
+	rc = sysfs_create_group(&reipl_subsys.kset.kobj, &reipl_nss_attr_group);
+	if (rc)
+		return rc;
+	strncpy(reipl_nss_name, kernel_nss_name, NSS_NAME_SIZE + 1);
+	reipl_capabilities |= IPL_TYPE_NSS;
+	return 0;
+}
+
 static int __init reipl_ccw_init(void)
 {
 	int rc;
@@ -835,6 +919,9 @@ static int __init reipl_init(void)
 	if (rc)
 		return rc;
 	rc = reipl_fcp_init();
+	if (rc)
+		return rc;
+	rc = reipl_nss_init();
 	if (rc)
 		return rc;
 	rc = reipl_set_type(ipl_get_type());