Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel…

…/git/s390/linux

Pull second s390 update from Martin Schwidefsky:
 "The big thing in this pull request is the UAPI patch from David, and
  worth mentioning is the page table dumper.  The rest are small
  improvements and bug fixes."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/entry: fix svc number for TIF_SYSCALL system call restart
  s390/mm,vmem: fix vmem_add_mem()/vmem_remove_range()
  s390/vmalloc: have separate modules area
  s390/zcrypt: remove duplicated include from zcrypt_pcixcc.c
  s390/css_chars: remove superfluous ifdef
  s390/chsc: make headers usable
  s390/mm: let kernel text section always begin at 1MB
  s390/mm: fix mapping of read-only kernel text section
  s390/mm: add page table dumper
  s390: add support to start the kernel in 64 bit mode.
  s390/mm,pageattr: remove superfluous EXPORT_SYMBOLs
  s390/mm,pageattr: add more page table walk sanity checks
  s390/mm: fix pmd_huge() usage for kernel mapping
  s390/dcssblk: cleanup device attribute usage
  s390/mm: use pfmf instruction to initialize storage keys
  s390/facilities: cleanup PFMF and HPAGE machine facility detection
  UAPI: (Scripted) Disintegrate arch/s390/include/asm

arch/s390/Kconfig.debug

@@ -31,6 +31,18 @@ config DEBUG_STRICT_USER_COPY_CHECKS
 
 	  If unsure, or if you run an older (pre 4.4) gcc, say N.
 
+config S390_PTDUMP
+	bool "Export kernel pagetable layout to userspace via debugfs"
+	depends on DEBUG_KERNEL
+	select DEBUG_FS
+	---help---
+	  Say Y here if you want to show the kernel pagetable layout in a
+	  debugfs file. This information is only useful for kernel developers
+	  who are working in architecture specific areas of the kernel.
+	  It is probably not a good idea to enable this feature in a production
+	  kernel.
+	  If in doubt, say "N"
+
 config DEBUG_SET_MODULE_RONX
 	def_bool y
 	depends on MODULES

arch/s390/include/asm/Kbuild

@@ -1,17 +1,3 @@
-include include/asm-generic/Kbuild.asm
 
-header-y += chpid.h
-header-y += chsc.h
-header-y += cmb.h
-header-y += dasd.h
-header-y += debug.h
-header-y += kvm_virtio.h
-header-y += monwriter.h
-header-y += qeth.h
-header-y += schid.h
-header-y += tape390.h
-header-y += ucontext.h
-header-y += vtoc.h
-header-y += zcrypt.h
 
 generic-y += clkdev.h

arch/s390/include/asm/chpid.h

@@ -1,24 +1,11 @@
 /*
- *    Copyright IBM Corp. 2007
+ *    Copyright IBM Corp. 2007, 2012
  *    Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
  */
-
 #ifndef _ASM_S390_CHPID_H
 #define _ASM_S390_CHPID_H
 
-#include <linux/string.h>
-#include <linux/types.h>
-
-#define __MAX_CHPID 255
-
-struct chp_id {
-	u8 reserved1;
-	u8 cssid;
-	u8 reserved2;
-	u8 id;
-} __attribute__((packed));
-
-#ifdef __KERNEL__
+#include <uapi/asm/chpid.h>
 #include <asm/cio.h>
 
 static inline void chp_id_init(struct chp_id *chpid)
@@ -49,6 +36,4 @@ static inline int chp_id_is_valid(struct chp_id *chpid)
 
 #define chp_id_for_each(c) \
 	for (chp_id_init(c); chp_id_is_valid(c); chp_id_next(c))
-#endif /* __KERNEL */
-
 #endif /* _ASM_S390_CHPID_H */

arch/s390/include/asm/cmb.h

@@ -1,61 +1,12 @@
 #ifndef S390_CMB_H
 #define S390_CMB_H
 
-#include <linux/types.h>
+#include <uapi/asm/cmb.h>
 
-/**
- * struct cmbdata - channel measurement block data for user space
- * @size: size of the stored data
- * @elapsed_time: time since last sampling
- * @ssch_rsch_count: number of ssch and rsch
- * @sample_count: number of samples
- * @device_connect_time: time of device connect
- * @function_pending_time: time of function pending
- * @device_disconnect_time: time of device disconnect
- * @control_unit_queuing_time: time of control unit queuing
- * @device_active_only_time: time of device active only
- * @device_busy_time: time of device busy (ext. format)
- * @initial_command_response_time: initial command response time (ext. format)
- *
- * All values are stored as 64 bit for simplicity, especially
- * in 32 bit emulation mode. All time values are normalized to
- * nanoseconds.
- * Currently, two formats are known, which differ by the size of
- * this structure, i.e. the last two members are only set when
- * the extended channel measurement facility (first shipped in
- * z990 machines) is activated.
- * Potentially, more fields could be added, which would result in a
- * new ioctl number.
- */
-struct cmbdata {
-	__u64 size;
-	__u64 elapsed_time;
- /* basic and exended format: */
-	__u64 ssch_rsch_count;
-	__u64 sample_count;
-	__u64 device_connect_time;
-	__u64 function_pending_time;
-	__u64 device_disconnect_time;
-	__u64 control_unit_queuing_time;
-	__u64 device_active_only_time;
- /* extended format only: */
-	__u64 device_busy_time;
-	__u64 initial_command_response_time;
-};
-
-/* enable channel measurement */
-#define BIODASDCMFENABLE	_IO(DASD_IOCTL_LETTER, 32)
-/* enable channel measurement */
-#define BIODASDCMFDISABLE	_IO(DASD_IOCTL_LETTER, 33)
-/* read channel measurement data */
-#define BIODASDREADALLCMB	_IOWR(DASD_IOCTL_LETTER, 33, struct cmbdata)
-
-#ifdef __KERNEL__
 struct ccw_device;
 extern int enable_cmf(struct ccw_device *cdev);
 extern int disable_cmf(struct ccw_device *cdev);
 extern u64 cmf_read(struct ccw_device *cdev, int index);
 extern int cmf_readall(struct ccw_device *cdev, struct cmbdata *data);
 
-#endif /* __KERNEL__ */
 #endif /* S390_CMB_H */

arch/s390/include/asm/css_chars.h

@@ -3,8 +3,6 @@
 
 #include <linux/types.h>
 
-#ifdef __KERNEL__
-
 struct css_general_char {
 	u64 : 12;
 	u32 dynio : 1;	 /* bit 12 */
@@ -35,5 +33,4 @@ struct css_general_char {
 
 extern struct css_general_char css_general_characteristics;
 
-#endif /* __KERNEL__ */
 #endif

arch/s390/include/asm/debug.h

@@ -3,39 +3,14 @@
  *
  *    Copyright IBM Corp. 1999, 2000
  */
-
 #ifndef DEBUG_H
 #define DEBUG_H
 
-#include <linux/fs.h>
-
-/* Note:
- * struct __debug_entry must be defined outside of #ifdef __KERNEL__ 
- * in order to allow a user program to analyze the 'raw'-view.
- */
-
-struct __debug_entry{
-        union {
-                struct {
-                        unsigned long long clock:52;
-                        unsigned long long exception:1;
-                        unsigned long long level:3;
-                        unsigned long long cpuid:8;
-                } fields;
-
-                unsigned long long stck;
-        } id;
-        void* caller;
-} __attribute__((packed));
-
-
-#define __DEBUG_FEATURE_VERSION      2  /* version of debug feature */
-
-#ifdef __KERNEL__
 #include <linux/string.h>
 #include <linux/spinlock.h>
 #include <linux/kernel.h>
 #include <linux/time.h>
+#include <uapi/asm/debug.h>
 
 #define DEBUG_MAX_LEVEL            6  /* debug levels range from 0 to 6 */
 #define DEBUG_OFF_LEVEL            -1 /* level where debug is switched off */
@@ -254,5 +229,4 @@ int debug_unregister_view(debug_info_t* id, struct debug_view* view);
 #define PRINT_FATAL(x...) printk ( KERN_DEBUG PRINTK_HEADER x )
 #endif				/* DASD_DEBUG */
 
-#endif				/* __KERNEL__ */
 #endif				/* DEBUG_H */

arch/s390/include/asm/kvm_para.h

@@ -9,12 +9,6 @@
  *
  *    Author(s): Christian Borntraeger <borntraeger@de.ibm.com>
  */
-
-#ifndef __S390_KVM_PARA_H
-#define __S390_KVM_PARA_H
-
-#ifdef __KERNEL__
-
 /*
  * Hypercalls for KVM on s390. The calling convention is similar to the
  * s390 ABI, so we use R2-R6 for parameters 1-5. In addition we use R1
@@ -29,6 +23,12 @@
  *
  * This work is licensed under the terms of the GNU GPL, version 2.
  */
+#ifndef __S390_KVM_PARA_H
+#define __S390_KVM_PARA_H
+
+#include <uapi/asm/kvm_para.h>
+
+
 
 static inline long kvm_hypercall0(unsigned long nr)
 {
@@ -154,6 +154,4 @@ static inline bool kvm_check_and_clear_guest_paused(void)
 	return false;
 }
 
-#endif
-
 #endif /* __S390_KVM_PARA_H */

arch/s390/include/asm/mman.h

@@ -3,17 +3,13 @@
  *
  *  Derived from "include/asm-i386/mman.h"
  */
-
 #ifndef __S390_MMAN_H__
 #define __S390_MMAN_H__
 
-#include <asm-generic/mman.h>
+#include <uapi/asm/mman.h>
 
-#if defined(__KERNEL__)
 #if !defined(__ASSEMBLY__) && defined(CONFIG_64BIT)
 int s390_mmap_check(unsigned long addr, unsigned long len);
 #define arch_mmap_check(addr,len,flags)	s390_mmap_check(addr,len)
 #endif
-#endif
-
 #endif /* __S390_MMAN_H__ */

arch/s390/include/asm/page.h

@@ -30,12 +30,20 @@
 #include <asm/setup.h>
 #ifndef __ASSEMBLY__
 
+static unsigned long pfmf(unsigned long function, unsigned long address)
+{
+	asm volatile(
+		"	.insn	rre,0xb9af0000,%[function],%[address]"
+		: [address] "+a" (address)
+		: [function] "d" (function)
+		: "memory");
+	return address;
+}
+
 static inline void clear_page(void *page)
 {
 	if (MACHINE_HAS_PFMF) {
-		asm volatile(
-			"	.insn	rre,0xb9af0000,%0,%1"
-			: : "d" (0x10000), "a" (page) : "memory", "cc");
+		pfmf(0x10000, (unsigned long)page);
 	} else {
 		register unsigned long reg1 asm ("1") = 0;
 		register void *reg2 asm ("2") = page;

arch/s390/include/asm/pgtable.h

@@ -119,20 +119,27 @@ static inline int is_zero_pfn(unsigned long pfn)
 
 #ifndef __ASSEMBLY__
 /*
- * The vmalloc area will always be on the topmost area of the kernel
- * mapping. We reserve 96MB (31bit) / 128GB (64bit) for vmalloc,
- * which should be enough for any sane case.
- * By putting vmalloc at the top, we maximise the gap between physical
- * memory and vmalloc to catch misplaced memory accesses. As a side
- * effect, this also makes sure that 64 bit module code cannot be used
- * as system call address.
+ * The vmalloc and module area will always be on the topmost area of the kernel
+ * mapping. We reserve 96MB (31bit) / 128GB (64bit) for vmalloc and modules.
+ * On 64 bit kernels we have a 2GB area at the top of the vmalloc area where
+ * modules will reside. That makes sure that inter module branches always
+ * happen without trampolines and in addition the placement within a 2GB frame
+ * is branch prediction unit friendly.
  */
 extern unsigned long VMALLOC_START;
 extern unsigned long VMALLOC_END;
 extern struct page *vmemmap;
 
 #define VMEM_MAX_PHYS ((unsigned long) vmemmap)
 
+#ifdef CONFIG_64BIT
+extern unsigned long MODULES_VADDR;
+extern unsigned long MODULES_END;
+#define MODULES_VADDR	MODULES_VADDR
+#define MODULES_END	MODULES_END
+#define MODULES_LEN	(1UL << 31)
+#endif
+
 /*
  * A 31 bit pagetable entry of S390 has following format:
  *  |   PFRA          |    |  OS  |
@@ -507,6 +514,15 @@ static inline int pmd_none(pmd_t pmd)
 	return (pmd_val(pmd) & _SEGMENT_ENTRY_INV) != 0UL;
 }
 
+static inline int pmd_large(pmd_t pmd)
+{
+#ifdef CONFIG_64BIT
+	return !!(pmd_val(pmd) & _SEGMENT_ENTRY_LARGE);
+#else
+	return 0;
+#endif
+}
+
 static inline int pmd_bad(pmd_t pmd)
 {
 	unsigned long mask = ~_SEGMENT_ENTRY_ORIGIN & ~_SEGMENT_ENTRY_INV;