---

yaml
---
r: 333015
b: refs/heads/master
c: ab08ff3
h: refs/heads/master
i:
  333013: 4807be8
  333011: 71e5626
  333007: 38b54b8
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 9807f75955ea7f1877981056755284481873115c
+refs/heads/master: ab08ff34b44f752b664ebb312d2e110cf37a7f5e

trunk/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

trunk/arch/s390/include/asm/chpid.h

@@ -1,5 +1,5 @@
 /*
- *    Copyright IBM Corp. 2007
+ *    Copyright IBM Corp. 2007, 2012
  *    Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
  */
 #ifndef _ASM_S390_CHPID_H

trunk/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

trunk/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;

trunk/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;

trunk/arch/s390/include/asm/setup.h

@@ -71,8 +71,8 @@ extern unsigned int s390_user_mode;
 #define MACHINE_FLAG_DIAG9C	(1UL << 7)
 #define MACHINE_FLAG_MVCOS	(1UL << 8)
 #define MACHINE_FLAG_KVM	(1UL << 9)
-#define MACHINE_FLAG_HPAGE	(1UL << 10)
-#define MACHINE_FLAG_PFMF	(1UL << 11)
+#define MACHINE_FLAG_EDAT1	(1UL << 10)
+#define MACHINE_FLAG_EDAT2	(1UL << 11)
 #define MACHINE_FLAG_LPAR	(1UL << 12)
 #define MACHINE_FLAG_SPP	(1UL << 13)
 #define MACHINE_FLAG_TOPOLOGY	(1UL << 14)
@@ -84,6 +84,8 @@ extern unsigned int s390_user_mode;
 #define MACHINE_IS_LPAR		(S390_lowcore.machine_flags & MACHINE_FLAG_LPAR)
 
 #define MACHINE_HAS_DIAG9C	(S390_lowcore.machine_flags & MACHINE_FLAG_DIAG9C)
+#define MACHINE_HAS_PFMF	MACHINE_HAS_EDAT1
+#define MACHINE_HAS_HPAGE	MACHINE_HAS_EDAT1
 
 #ifndef CONFIG_64BIT
 #define MACHINE_HAS_IEEE	(S390_lowcore.machine_flags & MACHINE_FLAG_IEEE)
@@ -92,8 +94,8 @@ extern unsigned int s390_user_mode;
 #define MACHINE_HAS_DIAG44	(1)
 #define MACHINE_HAS_MVPG	(S390_lowcore.machine_flags & MACHINE_FLAG_MVPG)
 #define MACHINE_HAS_MVCOS	(0)
-#define MACHINE_HAS_HPAGE	(0)
-#define MACHINE_HAS_PFMF	(0)
+#define MACHINE_HAS_EDAT1	(0)
+#define MACHINE_HAS_EDAT2	(0)
 #define MACHINE_HAS_SPP		(0)
 #define MACHINE_HAS_TOPOLOGY	(0)
 #define MACHINE_HAS_TE		(0)
@@ -105,8 +107,8 @@ extern unsigned int s390_user_mode;
 #define MACHINE_HAS_DIAG44	(S390_lowcore.machine_flags & MACHINE_FLAG_DIAG44)
 #define MACHINE_HAS_MVPG	(1)
 #define MACHINE_HAS_MVCOS	(S390_lowcore.machine_flags & MACHINE_FLAG_MVCOS)
-#define MACHINE_HAS_HPAGE	(S390_lowcore.machine_flags & MACHINE_FLAG_HPAGE)
-#define MACHINE_HAS_PFMF	(S390_lowcore.machine_flags & MACHINE_FLAG_PFMF)
+#define MACHINE_HAS_EDAT1	(S390_lowcore.machine_flags & MACHINE_FLAG_EDAT1)
+#define MACHINE_HAS_EDAT2	(S390_lowcore.machine_flags & MACHINE_FLAG_EDAT2)
 #define MACHINE_HAS_SPP		(S390_lowcore.machine_flags & MACHINE_FLAG_SPP)
 #define MACHINE_HAS_TOPOLOGY	(S390_lowcore.machine_flags & MACHINE_FLAG_TOPOLOGY)
 #define MACHINE_HAS_TE		(S390_lowcore.machine_flags & MACHINE_FLAG_TE)

trunk/arch/s390/include/uapi/asm/chsc.h

@@ -1,17 +1,20 @@
 /*
  * ioctl interface for /dev/chsc
  *
- * Copyright IBM Corp. 2008
+ * Copyright IBM Corp. 2008, 2012
  * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
  */
 
 #ifndef _ASM_CHSC_H
 #define _ASM_CHSC_H
 
 #include <linux/types.h>
+#include <linux/ioctl.h>
 #include <asm/chpid.h>
 #include <asm/schid.h>
 
+#define CHSC_SIZE 0x1000
+
 struct chsc_async_header {
 	__u16 length;
 	__u16 code;
@@ -23,15 +26,14 @@ struct chsc_async_header {
 
 struct chsc_async_area {
 	struct chsc_async_header header;
-	__u8 data[PAGE_SIZE - 16 /* size of chsc_async_header */];
+	__u8 data[CHSC_SIZE - sizeof(struct chsc_async_header)];
 } __attribute__ ((packed));
 
-
 struct chsc_response_struct {
 	__u16 length;
 	__u16 code;
 	__u32 parms;
-	__u8 data[PAGE_SIZE - 8];
+	__u8 data[CHSC_SIZE - 2 * sizeof(__u16) - sizeof(__u32)];
 } __attribute__ ((packed));
 
 struct chsc_chp_cd {

trunk/arch/s390/kernel/early.c

@@ -283,14 +283,6 @@ static noinline __init void setup_facility_list(void)
 	      ARRAY_SIZE(S390_lowcore.stfle_fac_list));
 }
 
-static noinline __init void setup_hpage(void)
-{
-	if (!test_facility(2) || !test_facility(8))
-		return;
-	S390_lowcore.machine_flags |= MACHINE_FLAG_HPAGE;
-	__ctl_set_bit(0, 23);
-}
-
 static __init void detect_mvpg(void)
 {
 #ifndef CONFIG_64BIT
@@ -378,10 +370,14 @@ static __init void detect_diag44(void)
 static __init void detect_machine_facilities(void)
 {
 #ifdef CONFIG_64BIT
+	if (test_facility(8)) {
+		S390_lowcore.machine_flags |= MACHINE_FLAG_EDAT1;
+		__ctl_set_bit(0, 23);
+	}
+	if (test_facility(78))
+		S390_lowcore.machine_flags |= MACHINE_FLAG_EDAT2;
 	if (test_facility(3))
 		S390_lowcore.machine_flags |= MACHINE_FLAG_IDTE;
-	if (test_facility(8))
-		S390_lowcore.machine_flags |= MACHINE_FLAG_PFMF;
 	if (test_facility(27))
 		S390_lowcore.machine_flags |= MACHINE_FLAG_MVCOS;
 	if (test_facility(40))
@@ -484,7 +480,6 @@ void __init startup_init(void)
 	detect_diag9c();
 	detect_diag44();
 	detect_machine_facilities();
-	setup_hpage();
 	setup_topology();
 	sclp_facilities_detect();
 	detect_memory_layout(memory_chunk);

trunk/arch/s390/kernel/entry64.S

@@ -295,7 +295,7 @@ sysc_sigpending:
 	jno	sysc_return
 	lmg	%r2,%r7,__PT_R2(%r11)	# load svc arguments
 	lghi	%r8,0			# svc 0 returns -ENOSYS
-	lh	%r1,__PT_INT_CODE+2(%r11)	# load new svc number
+	llgh	%r1,__PT_INT_CODE+2(%r11)	# load new svc number
 	cghi	%r1,NR_syscalls
 	jnl	sysc_nr_ok		# invalid svc number -> do svc 0
 	slag	%r8,%r1,2