Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6

* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6: (72 commits) [S390] 3215/3270 console: remove wrong comment [S390] dasd: remove BKL from extended error reporting code [S390] vmlogrdr: remove BKL [S390] vmur: remove BKL [S390] zcrypt: remove BKL [S390] 3270: remove BKL [S390] vmwatchdog: remove lock_kernel() from open() function [S390] monwriter: remove lock_kernel() from open() function [S390] monreader: remove lock_kernel() from open() function [S390] s390: remove unused nfsd #includes [S390] ftrace: build ftrace.o when CONFIG_FTRACE_SYSCALLS is set for s390 [S390] etr/stp: put correct per cpu variable [S390] tty3270: move keyboard compat ioctls [S390] sclp: improve servicability setting [S390] s390: use change recording override for kernel mapping [S390] MAINTAINERS: Add s390 drivers block [S390] use generic sockios.h header file [S390] use generic termbits.h header file [S390] smp: remove unused typedef and defines [S390] cmm: free pages on hibernate. ...
2026-05-01 15:00:59 -07:00 · 2009-12-09 19:01:47 -08:00
parent 5327b9b83a 42d61b9b41
commit 67dd2f5a66
76 changed files with 2798 additions and 2784 deletions
@@ -3139,6 +3139,7 @@ S:	Supported
 F:	Documentation/s390/kvm.txt
 F:	arch/s390/include/asm/kvm*
 F:	arch/s390/kvm/
+F:	drivers/s390/kvm/

 KEXEC
 M:	Eric Biederman <ebiederm@xmission.com>
@@ -4553,6 +4554,7 @@ L:	linux-s390@vger.kernel.org
 W:	http://www.ibm.com/developerworks/linux/linux390/
 S:	Supported
 F:	arch/s390/
+F:	drivers/s390/

 S390 NETWORK DRIVERS
 M:	Ursula Braun <ursula.braun@de.ibm.com>
@@ -4568,6 +4570,7 @@ M:	Felix Beck <felix.beck@de.ibm.com>
 M:	Ralph Wuerthner <ralph.wuerthner@de.ibm.com>
 M:	linux390@de.ibm.com
 L:	linux-s390@vger.kernel.org
+W:	http://www.ibm.com/developerworks/linux/linux390/
 S:	Supported
 F:	drivers/s390/crypto/

@@ -220,23 +220,8 @@ config AUDIT_ARCH
 	bool
 	default y

-config S390_SWITCH_AMODE
-	bool "Switch kernel/user addressing modes"
-	help
-	  This option allows to switch the addressing modes of kernel and user
-	  space. The kernel parameter switch_amode=on will enable this feature,
-	  default is disabled. Enabling this (via kernel parameter) on machines
-	  earlier than IBM System z9-109 EC/BC will reduce system performance.
-
-	  Note that this option will also be selected by selecting the execute
-	  protection option below. Enabling the execute protection via the
-	  noexec kernel parameter will also switch the addressing modes,
-	  independent of the switch_amode kernel parameter.
-
-
 config S390_EXEC_PROTECT
 	bool "Data execute protection"
-	select S390_SWITCH_AMODE
 	help
 	  This option allows to enable a buffer overflow protection for user
 	  space programs and it also selects the addressing mode option above.
@@ -185,7 +185,6 @@ CONFIG_HOTPLUG_CPU=y
 CONFIG_COMPAT=y
 CONFIG_SYSVIPC_COMPAT=y
 CONFIG_AUDIT_ARCH=y
-CONFIG_S390_SWITCH_AMODE=y
 CONFIG_S390_EXEC_PROTECT=y

 #
@@ -21,7 +21,7 @@
 #if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ > 2)

 #define __CS_LOOP(ptr, op_val, op_string) ({				\
-	typeof(ptr->counter) old_val, new_val;				\
+	int old_val, new_val;						\
 	asm volatile(							\
 		"	l	%0,%2\n"				\
 		"0:	lr	%1,%0\n"				\
@@ -38,7 +38,7 @@
 #else /* __GNUC__ */

 #define __CS_LOOP(ptr, op_val, op_string) ({				\
-	typeof(ptr->counter) old_val, new_val;				\
+	int old_val, new_val;						\
 	asm volatile(							\
 		"	l	%0,0(%3)\n"				\
 		"0:	lr	%1,%0\n"				\
@@ -143,7 +143,7 @@ static inline int atomic_add_unless(atomic_t *v, int a, int u)
 #if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ > 2)

 #define __CSG_LOOP(ptr, op_val, op_string) ({				\
-	typeof(ptr->counter) old_val, new_val;				\
+	long long old_val, new_val;					\
 	asm volatile(							\
 		"	lg	%0,%2\n"				\
 		"0:	lgr	%1,%0\n"				\
@@ -160,7 +160,7 @@ static inline int atomic_add_unless(atomic_t *v, int a, int u)
 #else /* __GNUC__ */

 #define __CSG_LOOP(ptr, op_val, op_string) ({				\
-	typeof(ptr->counter) old_val, new_val;				\
+	long long old_val, new_val;					\
 	asm volatile(							\
 		"	lg	%0,0(%3)\n"				\
 		"0:	lgr	%1,%0\n"				\
@@ -142,6 +142,8 @@ struct ccw1;
 extern int ccw_device_set_options_mask(struct ccw_device *, unsigned long);
 extern int ccw_device_set_options(struct ccw_device *, unsigned long);
 extern void ccw_device_clear_options(struct ccw_device *, unsigned long);
+int ccw_device_is_pathgroup(struct ccw_device *cdev);
+int ccw_device_is_multipath(struct ccw_device *cdev);

 /* Allow for i/o completion notification after primary interrupt status. */
 #define CCWDEV_EARLY_NOTIFICATION	0x0001
@@ -151,6 +153,8 @@ extern void ccw_device_clear_options(struct ccw_device *, unsigned long);
 #define CCWDEV_DO_PATHGROUP             0x0004
 /* Allow forced onlining of boxed devices. */
 #define CCWDEV_ALLOW_FORCE              0x0008
+/* Try to use multipath mode. */
+#define CCWDEV_DO_MULTIPATH		0x0010

 extern int ccw_device_start(struct ccw_device *, struct ccw1 *,
 			    unsigned long, __u8, unsigned long);
@@ -36,7 +36,7 @@ static inline int init_new_context(struct task_struct *tsk,
 		mm->context.has_pgste = 1;
 		mm->context.alloc_pgste = 1;
 	} else {
-		mm->context.noexec = s390_noexec;
+		mm->context.noexec = (user_mode == SECONDARY_SPACE_MODE);
 		mm->context.has_pgste = 0;
 		mm->context.alloc_pgste = 0;
 	}
@@ -58,7 +58,7 @@ static inline void update_mm(struct mm_struct *mm, struct task_struct *tsk)
 	pgd_t *pgd = mm->pgd;

 	S390_lowcore.user_asce = mm->context.asce_bits | __pa(pgd);
-	if (switch_amode) {
+	if (user_mode != HOME_SPACE_MODE) {
 		/* Load primary space page table origin. */
 		pgd = mm->context.noexec ? get_shadow_table(pgd) : pgd;
 		S390_lowcore.user_exec_asce = mm->context.asce_bits | __pa(pgd);
@@ -143,7 +143,8 @@ static inline pgd_t *pgd_alloc(struct mm_struct *mm)
 	spin_lock_init(&mm->context.list_lock);
 	INIT_LIST_HEAD(&mm->context.crst_list);
 	INIT_LIST_HEAD(&mm->context.pgtable_list);
-	return (pgd_t *) crst_table_alloc(mm, s390_noexec);
+	return (pgd_t *)
+		crst_table_alloc(mm, user_mode == SECONDARY_SPACE_MODE);
 }
 #define pgd_free(mm, pgd) crst_table_free(mm, (unsigned long *) pgd)

@@ -169,12 +169,13 @@ extern unsigned long VMALLOC_START;
 * STL Segment-Table-Length:  Segment-table length (STL+1*16 entries -> up to 2048)
 *
 * A 64 bit pagetable entry of S390 has following format:
- * |                     PFRA                         |0IP0|  OS  |
+ * |			 PFRA			      |0IPC|  OS  |
 * 0000000000111111111122222222223333333333444444444455555555556666
 * 0123456789012345678901234567890123456789012345678901234567890123
 *
 * I Page-Invalid Bit:    Page is not available for address-translation
 * P Page-Protection Bit: Store access not possible for page
+ * C Change-bit override: HW is not required to set change bit
 *
 * A 64 bit segmenttable entry of S390 has following format:
 * |        P-table origin                              |      TT
@@ -218,6 +219,7 @@ extern unsigned long VMALLOC_START;
 */

 /* Hardware bits in the page table entry */
+#define _PAGE_CO	0x100		/* HW Change-bit override */
 #define _PAGE_RO	0x200		/* HW read-only bit  */
 #define _PAGE_INVALID	0x400		/* HW invalid bit    */

@@ -49,17 +49,12 @@ extern unsigned long memory_end;

 void detect_memory_layout(struct mem_chunk chunk[]);

-#ifdef CONFIG_S390_SWITCH_AMODE
-extern unsigned int switch_amode;
-#else
-#define switch_amode	(0)
-#endif
+#define PRIMARY_SPACE_MODE	0
+#define ACCESS_REGISTER_MODE	1
+#define SECONDARY_SPACE_MODE	2
+#define HOME_SPACE_MODE		3

-#ifdef CONFIG_S390_EXEC_PROTECT
-extern unsigned int s390_noexec;
-#else
-#define s390_noexec	(0)
-#endif
+extern unsigned int user_mode;

 /*
 * Machine features detected in head.S
@@ -1,57 +1,22 @@
 /*
- *  include/asm-s390/smp.h
- *
- *  S390 version
- *    Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
- *    Author(s): Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com),
- *               Martin Schwidefsky (schwidefsky@de.ibm.com)
- *               Heiko Carstens (heiko.carstens@de.ibm.com)
+ *    Copyright IBM Corp. 1999,2009
+ *    Author(s): Denis Joseph Barrow,
+ *		 Martin Schwidefsky <schwidefsky@de.ibm.com>,
+ *		 Heiko Carstens <heiko.carstens@de.ibm.com>,
 */
 #ifndef __ASM_SMP_H
 #define __ASM_SMP_H

-#include <linux/threads.h>
-#include <linux/cpumask.h>
-#include <linux/bitops.h>
+#ifdef CONFIG_SMP

-#if defined(__KERNEL__) && defined(CONFIG_SMP) && !defined(__ASSEMBLY__)
-
-#include <asm/lowcore.h>
-#include <asm/sigp.h>
-#include <asm/ptrace.h>
 #include <asm/system.h>
-
-/*
-  s390 specific smp.c headers
- */
-typedef struct
-{
-	int        intresting;
-	sigp_ccode ccode; 
-	__u32      status;
-	__u16      cpu;
-} sigp_info;
+#include <asm/sigp.h>

 extern void machine_restart_smp(char *);
 extern void machine_halt_smp(void);
 extern void machine_power_off_smp(void);

-#define NO_PROC_ID		0xFF		/* No processor magic marker */
-
-/*
- *	This magic constant controls our willingness to transfer
- *	a process across CPUs. Such a transfer incurs misses on the L1
- *	cache, and on a P6 or P5 with multiple L2 caches L2 hits. My
- *	gut feeling is this will vary by board in value. For a board
- *	with separate L2 cache it probably depends also on the RSS, and
- *	for a board with shared L2 cache it ought to decay fast as other
- *	processes are run.
- */
- 
-#define PROC_CHANGE_PENALTY	20		/* Schedule penalty */
-
 #define raw_smp_processor_id()	(S390_lowcore.cpu_nr)
-#define cpu_logical_map(cpu)	(cpu)

 extern int __cpu_disable (void);
 extern void __cpu_die (unsigned int cpu);
@@ -64,7 +29,9 @@ extern int smp_cpu_polarization[];
 extern void arch_send_call_function_single_ipi(int cpu);
 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);

-#endif
+extern union save_area *zfcpdump_save_areas[NR_CPUS + 1];
+
+#endif /* CONFIG_SMP */

 #ifdef CONFIG_HOTPLUG_CPU
 extern int smp_rescan_cpus(void);
@@ -72,5 +39,4 @@ extern int smp_rescan_cpus(void);
 static inline int smp_rescan_cpus(void) { return 0; }
 #endif

-extern union save_area *zfcpdump_save_areas[NR_CPUS + 1];
-#endif
+#endif /* __ASM_SMP_H */
@@ -1,21 +1,6 @@
-/*
- *  include/asm-s390/sockios.h
- *
- *  S390 version
- *
- *  Derived from "include/asm-i386/sockios.h"
- */
+#ifndef _ASM_S390_SOCKIOS_H
+#define _ASM_S390_SOCKIOS_H

-#ifndef __ARCH_S390_SOCKIOS__
-#define __ARCH_S390_SOCKIOS__
-
-/* Socket-level I/O control calls. */
-#define FIOSETOWN 	0x8901
-#define SIOCSPGRP	0x8902
-#define FIOGETOWN	0x8903
-#define SIOCGPGRP	0x8904
-#define SIOCATMARK	0x8905
-#define SIOCGSTAMP	0x8906		/* Get stamp (timeval) */
-#define SIOCGSTAMPNS	0x8907		/* Get stamp (timespec) */
+#include <asm-generic/sockios.h>

 #endif
@@ -1,206 +1,6 @@
-/*
- *  include/asm-s390/termbits.h
- *
- *  S390 version
- *
- *  Derived from "include/asm-i386/termbits.h"
- */
+#ifndef _ASM_S390_TERMBITS_H
+#define _ASM_S390_TERMBITS_H

-#ifndef __ARCH_S390_TERMBITS_H__
-#define __ARCH_S390_TERMBITS_H__
-
-#include <linux/posix_types.h>
-
-typedef unsigned char	cc_t;
-typedef unsigned int	speed_t;
-typedef unsigned int	tcflag_t;
-
-#define NCCS 19
-struct termios {
-	tcflag_t c_iflag;		/* input mode flags */
-	tcflag_t c_oflag;		/* output mode flags */
-	tcflag_t c_cflag;		/* control mode flags */
-	tcflag_t c_lflag;		/* local mode flags */
-	cc_t c_line;			/* line discipline */
-	cc_t c_cc[NCCS];		/* control characters */
-};
-
-struct termios2 {
-	tcflag_t c_iflag;		/* input mode flags */
-	tcflag_t c_oflag;		/* output mode flags */
-	tcflag_t c_cflag;		/* control mode flags */
-	tcflag_t c_lflag;		/* local mode flags */
-	cc_t c_line;			/* line discipline */
-	cc_t c_cc[NCCS];		/* control characters */
-	speed_t c_ispeed;		/* input speed */
-	speed_t c_ospeed;		/* output speed */
-};
-
-struct ktermios {
-	tcflag_t c_iflag;		/* input mode flags */
-	tcflag_t c_oflag;		/* output mode flags */
-	tcflag_t c_cflag;		/* control mode flags */
-	tcflag_t c_lflag;		/* local mode flags */
-	cc_t c_line;			/* line discipline */
-	cc_t c_cc[NCCS];		/* control characters */
-	speed_t c_ispeed;		/* input speed */
-	speed_t c_ospeed;		/* output speed */
-};
-
-/* c_cc characters */
-#define VINTR 0
-#define VQUIT 1
-#define VERASE 2
-#define VKILL 3
-#define VEOF 4
-#define VTIME 5
-#define VMIN 6
-#define VSWTC 7
-#define VSTART 8
-#define VSTOP 9
-#define VSUSP 10
-#define VEOL 11
-#define VREPRINT 12
-#define VDISCARD 13
-#define VWERASE 14
-#define VLNEXT 15
-#define VEOL2 16
-
-/* c_iflag bits */
-#define IGNBRK	0000001
-#define BRKINT	0000002
-#define IGNPAR	0000004
-#define PARMRK	0000010
-#define INPCK	0000020
-#define ISTRIP	0000040
-#define INLCR	0000100
-#define IGNCR	0000200
-#define ICRNL	0000400
-#define IUCLC	0001000
-#define IXON	0002000
-#define IXANY	0004000
-#define IXOFF	0010000
-#define IMAXBEL	0020000
-#define IUTF8	0040000
-
-/* c_oflag bits */
-#define OPOST	0000001
-#define OLCUC	0000002
-#define ONLCR	0000004
-#define OCRNL	0000010
-#define ONOCR	0000020
-#define ONLRET	0000040
-#define OFILL	0000100
-#define OFDEL	0000200
-#define NLDLY	0000400
-#define   NL0	0000000
-#define   NL1	0000400
-#define CRDLY	0003000
-#define   CR0	0000000
-#define   CR1	0001000
-#define   CR2	0002000
-#define   CR3	0003000
-#define TABDLY	0014000
-#define   TAB0	0000000
-#define   TAB1	0004000
-#define   TAB2	0010000
-#define   TAB3	0014000
-#define   XTABS	0014000
-#define BSDLY	0020000
-#define   BS0	0000000
-#define   BS1	0020000
-#define VTDLY	0040000
-#define   VT0	0000000
-#define   VT1	0040000
-#define FFDLY	0100000
-#define   FF0	0000000
-#define   FF1	0100000
-
-/* c_cflag bit meaning */
-#define CBAUD	0010017
-#define  B0	0000000		/* hang up */
-#define  B50	0000001
-#define  B75	0000002
-#define  B110	0000003
-#define  B134	0000004
-#define  B150	0000005
-#define  B200	0000006
-#define  B300	0000007
-#define  B600	0000010
-#define  B1200	0000011
-#define  B1800	0000012
-#define  B2400	0000013
-#define  B4800	0000014
-#define  B9600	0000015
-#define  B19200	0000016
-#define  B38400	0000017
-#define EXTA B19200
-#define EXTB B38400
-#define CSIZE	0000060
-#define   CS5	0000000
-#define   CS6	0000020
-#define   CS7	0000040
-#define   CS8	0000060
-#define CSTOPB	0000100
-#define CREAD	0000200
-#define PARENB	0000400
-#define PARODD	0001000
-#define HUPCL	0002000
-#define CLOCAL	0004000
-#define CBAUDEX 0010000
-#define  BOTHER  0010000
-#define  B57600  0010001
-#define  B115200 0010002
-#define  B230400 0010003
-#define  B460800 0010004
-#define   B500000 0010005
-#define   B576000 0010006
-#define   B921600 0010007
-#define  B1000000 0010010
-#define  B1152000 0010011
-#define  B1500000 0010012
-#define  B2000000 0010013
-#define  B2500000 0010014
-#define  B3000000 0010015
-#define  B3500000 0010016
-#define  B4000000 0010017
-#define CIBAUD	  002003600000	/* input baud rate */
-#define CMSPAR	  010000000000		/* mark or space (stick) parity */
-#define CRTSCTS	  020000000000		/* flow control */
-
-#define IBSHIFT	  16		/* Shift from CBAUD to CIBAUD */
-
-/* c_lflag bits */
-#define ISIG	0000001
-#define ICANON	0000002
-#define XCASE	0000004
-#define ECHO	0000010
-#define ECHOE	0000020
-#define ECHOK	0000040
-#define ECHONL	0000100
-#define NOFLSH	0000200
-#define TOSTOP	0000400
-#define ECHOCTL	0001000
-#define ECHOPRT	0002000
-#define ECHOKE	0004000
-#define FLUSHO	0010000
-#define PENDIN	0040000
-#define IEXTEN	0100000
-
-/* tcflow() and TCXONC use these */
-#define	TCOOFF		0
-#define	TCOON		1
-#define	TCIOFF		2
-#define	TCION		3
-
-/* tcflush() and TCFLSH use these */
-#define	TCIFLUSH	0
-#define	TCOFLUSH	1
-#define	TCIOFLUSH	2
-
-/* tcsetattr uses these */
-#define	TCSANOW		0
-#define	TCSADRAIN	1
-#define	TCSAFLUSH	2
+#include <asm-generic/termbits.h>

 #endif
@@ -1,23 +0,0 @@
-/*
- * File...........: linux/include/asm/todclk.h
- * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
- * Bugreports.to..: <Linux390@de.ibm.com>
- * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000
- *
- * History of changes (starts July 2000)
- */
-
-#ifndef __ASM_TODCLK_H
-#define __ASM_TODCLK_H
-
-#ifdef __KERNEL__
-
-#define TOD_uSEC (0x1000ULL)
-#define TOD_mSEC (1000 * TOD_uSEC)
-#define TOD_SEC (1000 * TOD_mSEC)
-#define TOD_MIN (60 * TOD_SEC)
-#define TOD_HOUR (60 * TOD_MIN)
-
-#endif
-
-#endif
@@ -93,6 +93,8 @@ extern struct uaccess_ops uaccess_mvcos;
 extern struct uaccess_ops uaccess_mvcos_switch;
 extern struct uaccess_ops uaccess_pt;

+extern int __handle_fault(unsigned long, unsigned long, int);
+
 static inline int __put_user_fn(size_t size, void __user *ptr, void *x)
 {
 	size = uaccess.copy_to_user_small(size, ptr, x);
@@ -44,6 +44,7 @@ obj-$(CONFIG_KPROBES)		+= kprobes.o
 obj-$(CONFIG_FUNCTION_TRACER)	+= $(if $(CONFIG_64BIT),mcount64.o,mcount.o)
 obj-$(CONFIG_DYNAMIC_FTRACE)	+= ftrace.o
 obj-$(CONFIG_FUNCTION_GRAPH_TRACER) += ftrace.o
+obj-$(CONFIG_FTRACE_SYSCALLS)  += ftrace.o

 # Kexec part
 S390_KEXEC_OBJS := machine_kexec.o crash.o
@@ -31,14 +31,8 @@
 #include <linux/shm.h>
 #include <linux/slab.h>
 #include <linux/uio.h>
-#include <linux/nfs_fs.h>
 #include <linux/quota.h>
 #include <linux/module.h>
-#include <linux/sunrpc/svc.h>
-#include <linux/nfsd/nfsd.h>
-#include <linux/nfsd/cache.h>
-#include <linux/nfsd/xdr.h>
-#include <linux/nfsd/syscall.h>
 #include <linux/poll.h>
 #include <linux/personality.h>
 #include <linux/stat.h>
@@ -4,10 +4,6 @@
 #include <linux/compat.h>
 #include <linux/socket.h>
 #include <linux/syscalls.h>
-#include <linux/nfs_fs.h>
-#include <linux/sunrpc/svc.h>
-#include <linux/nfsd/nfsd.h>
-#include <linux/nfsd/export.h>

 /* Macro that masks the high order bit of an 32 bit pointer and converts it*/
 /*       to a 64 bit pointer */
@@ -83,6 +83,8 @@ startup_continue:
 	slr	%r0,%r0 		# set cpuid to zero
 	sigp	%r1,%r0,0x12		# switch to esame mode
 	sam64				# switch to 64 bit mode
+	llgfr	%r13,%r13		# clear high-order half of base reg
+	lmh	%r0,%r15,.Lzero64-.LPG1(%r13)	# clear high-order half
 	lctlg	%c0,%c15,.Lctl-.LPG1(%r13)	# load control registers
 	lg	%r12,.Lparmaddr-.LPG1(%r13)	# pointer to parameter area
 					# move IPL device to lowcore
@@ -127,6 +129,7 @@ startup_continue:
 .L4malign:.quad 0xffffffffffc00000
 .Lscan2g:.quad	0x80000000 + 0x20000 - 8	# 2GB + 128K - 8
 .Lnop:	.long	0x07000700
+.Lzero64:.fill	16,4,0x0
 #ifdef CONFIG_ZFCPDUMP
 .Lcurrent_cpu:
 	.long 0x0
@@ -305,9 +305,8 @@ static int __init early_parse_mem(char *p)
 }
 early_param("mem", early_parse_mem);

-#ifdef CONFIG_S390_SWITCH_AMODE
-unsigned int switch_amode = 0;
-EXPORT_SYMBOL_GPL(switch_amode);
+unsigned int user_mode = HOME_SPACE_MODE;
+EXPORT_SYMBOL_GPL(user_mode);

 static int set_amode_and_uaccess(unsigned long user_amode,
 				 unsigned long user32_amode)
@@ -340,23 +339,29 @@ static int set_amode_and_uaccess(unsigned long user_amode,
 */
 static int __init early_parse_switch_amode(char *p)
 {
-	switch_amode = 1;
+	if (user_mode != SECONDARY_SPACE_MODE)
+		user_mode = PRIMARY_SPACE_MODE;
 	return 0;
 }
 early_param("switch_amode", early_parse_switch_amode);

-#else /* CONFIG_S390_SWITCH_AMODE */
-static inline int set_amode_and_uaccess(unsigned long user_amode,
-					unsigned long user32_amode)
+static int __init early_parse_user_mode(char *p)
 {
+	if (p && strcmp(p, "primary") == 0)
+		user_mode = PRIMARY_SPACE_MODE;
+#ifdef CONFIG_S390_EXEC_PROTECT
+	else if (p && strcmp(p, "secondary") == 0)
+		user_mode = SECONDARY_SPACE_MODE;
+#endif
+	else if (!p || strcmp(p, "home") == 0)
+		user_mode = HOME_SPACE_MODE;
+	else
+		return 1;
 	return 0;
 }
-#endif /* CONFIG_S390_SWITCH_AMODE */
+early_param("user_mode", early_parse_user_mode);

 #ifdef CONFIG_S390_EXEC_PROTECT
-unsigned int s390_noexec = 0;
-EXPORT_SYMBOL_GPL(s390_noexec);
-
 /*
 * Enable execute protection?
 */
@@ -364,8 +369,7 @@ static int __init early_parse_noexec(char *p)
 {
 	if (!strncmp(p, "off", 3))
 		return 0;
-	switch_amode = 1;
-	s390_noexec = 1;
+	user_mode = SECONDARY_SPACE_MODE;
 	return 0;
 }
 early_param("noexec", early_parse_noexec);
@@ -373,7 +377,7 @@ early_param("noexec", early_parse_noexec);

 static void setup_addressing_mode(void)
 {
-	if (s390_noexec) {
+	if (user_mode == SECONDARY_SPACE_MODE) {
 		if (set_amode_and_uaccess(PSW_ASC_SECONDARY,
 					  PSW32_ASC_SECONDARY))
 			pr_info("Execute protection active, "
@@ -381,7 +385,7 @@ static void setup_addressing_mode(void)
 		else
 			pr_info("Execute protection active, "
 				"mvcos not available\n");
-	} else if (switch_amode) {
+	} else if (user_mode == PRIMARY_SPACE_MODE) {
 		if (set_amode_and_uaccess(PSW_ASC_PRIMARY, PSW32_ASC_PRIMARY))
 			pr_info("Address spaces switched, "
 				"mvcos available\n");
@@ -411,7 +415,7 @@ setup_lowcore(void)
 	lc->restart_psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY;
 	lc->restart_psw.addr =
 		PSW_ADDR_AMODE | (unsigned long) restart_int_handler;
-	if (switch_amode)
+	if (user_mode != HOME_SPACE_MODE)
 		lc->restart_psw.mask |= PSW_ASC_HOME;
 	lc->external_new_psw.mask = psw_kernel_bits;
 	lc->external_new_psw.addr =
@@ -335,7 +335,7 @@ int get_sync_clock(unsigned long long *clock)
 	sw0 = atomic_read(sw_ptr);
 	*clock = get_clock();
 	sw1 = atomic_read(sw_ptr);
-	put_cpu_var(clock_sync_sync);
+	put_cpu_var(clock_sync_word);
 	if (sw0 == sw1 && (sw0 & 0x80000000U))
 		/* Success: time is in sync. */
 		return 0;
@@ -385,7 +385,7 @@ static inline int check_sync_clock(void)

 	sw_ptr = &get_cpu_var(clock_sync_word);
 	rc = (atomic_read(sw_ptr) & 0x80000000U) != 0;
-	put_cpu_var(clock_sync_sync);
+	put_cpu_var(clock_sync_word);
 	return rc;
 }

--- a/Show More
+++ b/Show More