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-rw-r--r--arch/s390/mm/cmm.c2
-rw-r--r--arch/s390/mm/extmem.c3
-rw-r--r--arch/s390/mm/fault.c39
-rw-r--r--arch/s390/mm/hugetlbpage.c2
-rw-r--r--arch/s390/mm/init.c4
-rw-r--r--arch/s390/mm/mmap.c14
-rw-r--r--arch/s390/mm/pgtable.c9
-rw-r--r--arch/s390/mm/vmem.c2
8 files changed, 40 insertions, 35 deletions
diff --git a/arch/s390/mm/cmm.c b/arch/s390/mm/cmm.c
index 1f1dba9dcf58..479e94282910 100644
--- a/arch/s390/mm/cmm.c
+++ b/arch/s390/mm/cmm.c
@@ -1,7 +1,7 @@
/*
* Collaborative memory management interface.
*
- * Copyright IBM Corp 2003,2010
+ * Copyright IBM Corp 2003, 2010
* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>,
*
*/
diff --git a/arch/s390/mm/extmem.c b/arch/s390/mm/extmem.c
index 075ddada4911..519bba716cc3 100644
--- a/arch/s390/mm/extmem.c
+++ b/arch/s390/mm/extmem.c
@@ -1,10 +1,9 @@
/*
- * File...........: arch/s390/mm/extmem.c
* Author(s)......: Carsten Otte <cotte@de.ibm.com>
* Rob M van der Heij <rvdheij@nl.ibm.com>
* Steven Shultz <shultzss@us.ibm.com>
* Bugreports.to..: <Linux390@de.ibm.com>
- * (C) IBM Corporation 2002-2004
+ * Copyright IBM Corp. 2002, 2004
*/
#define KMSG_COMPONENT "extmem"
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c
index 72cec9ecd96c..6c013f544146 100644
--- a/arch/s390/mm/fault.c
+++ b/arch/s390/mm/fault.c
@@ -1,8 +1,6 @@
/*
- * arch/s390/mm/fault.c
- *
* S390 version
- * Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ * Copyright IBM Corp. 1999
* Author(s): Hartmut Penner (hp@de.ibm.com)
* Ulrich Weigand (uweigand@de.ibm.com)
*
@@ -51,6 +49,7 @@
#define VM_FAULT_BADCONTEXT 0x010000
#define VM_FAULT_BADMAP 0x020000
#define VM_FAULT_BADACCESS 0x040000
+#define VM_FAULT_SIGNAL 0x080000
static unsigned long store_indication;
@@ -112,7 +111,7 @@ static inline int user_space_fault(unsigned long trans_exc_code)
if (trans_exc_code == 2)
/* Access via secondary space, set_fs setting decides */
return current->thread.mm_segment.ar4;
- if (user_mode == HOME_SPACE_MODE)
+ if (addressing_mode == HOME_SPACE_MODE)
/* User space if the access has been done via home space. */
return trans_exc_code == 3;
/*
@@ -221,7 +220,7 @@ static noinline void do_fault_error(struct pt_regs *regs, int fault)
case VM_FAULT_BADACCESS:
case VM_FAULT_BADMAP:
/* Bad memory access. Check if it is kernel or user space. */
- if (regs->psw.mask & PSW_MASK_PSTATE) {
+ if (user_mode(regs)) {
/* User mode accesses just cause a SIGSEGV */
si_code = (fault == VM_FAULT_BADMAP) ?
SEGV_MAPERR : SEGV_ACCERR;
@@ -231,15 +230,19 @@ static noinline void do_fault_error(struct pt_regs *regs, int fault)
case VM_FAULT_BADCONTEXT:
do_no_context(regs);
break;
+ case VM_FAULT_SIGNAL:
+ if (!user_mode(regs))
+ do_no_context(regs);
+ break;
default: /* fault & VM_FAULT_ERROR */
if (fault & VM_FAULT_OOM) {
- if (!(regs->psw.mask & PSW_MASK_PSTATE))
+ if (!user_mode(regs))
do_no_context(regs);
else
pagefault_out_of_memory();
} else if (fault & VM_FAULT_SIGBUS) {
/* Kernel mode? Handle exceptions or die */
- if (!(regs->psw.mask & PSW_MASK_PSTATE))
+ if (!user_mode(regs))
do_no_context(regs);
else
do_sigbus(regs);
@@ -288,7 +291,7 @@ static inline int do_exception(struct pt_regs *regs, int access)
address = trans_exc_code & __FAIL_ADDR_MASK;
perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, address);
- flags = FAULT_FLAG_ALLOW_RETRY;
+ flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE;
if (access == VM_WRITE || (trans_exc_code & store_indication) == 0x400)
flags |= FAULT_FLAG_WRITE;
down_read(&mm->mmap_sem);
@@ -337,6 +340,11 @@ retry:
* the fault.
*/
fault = handle_mm_fault(mm, vma, address, flags);
+ /* No reason to continue if interrupted by SIGKILL. */
+ if ((fault & VM_FAULT_RETRY) && fatal_signal_pending(current)) {
+ fault = VM_FAULT_SIGNAL;
+ goto out;
+ }
if (unlikely(fault & VM_FAULT_ERROR))
goto out_up;
@@ -428,7 +436,7 @@ void __kprobes do_asce_exception(struct pt_regs *regs)
}
/* User mode accesses just cause a SIGSEGV */
- if (regs->psw.mask & PSW_MASK_PSTATE) {
+ if (user_mode(regs)) {
do_sigsegv(regs, SEGV_MAPERR);
return;
}
@@ -443,6 +451,7 @@ int __handle_fault(unsigned long uaddr, unsigned long pgm_int_code, int write)
struct pt_regs regs;
int access, fault;
+ /* Emulate a uaccess fault from kernel mode. */
regs.psw.mask = psw_kernel_bits | PSW_MASK_DAT | PSW_MASK_MCHECK;
if (!irqs_disabled())
regs.psw.mask |= PSW_MASK_IO | PSW_MASK_EXT;
@@ -452,12 +461,12 @@ int __handle_fault(unsigned long uaddr, unsigned long pgm_int_code, int write)
regs.int_parm_long = (uaddr & PAGE_MASK) | 2;
access = write ? VM_WRITE : VM_READ;
fault = do_exception(&regs, access);
- if (unlikely(fault)) {
- if (fault & VM_FAULT_OOM)
- return -EFAULT;
- else if (fault & VM_FAULT_SIGBUS)
- do_sigbus(&regs);
- }
+ /*
+ * Since the fault happened in kernel mode while performing a uaccess
+ * all we need to do now is emulating a fixup in case "fault" is not
+ * zero.
+ * For the calling uaccess functions this results always in -EFAULT.
+ */
return fault ? -EFAULT : 0;
}
diff --git a/arch/s390/mm/hugetlbpage.c b/arch/s390/mm/hugetlbpage.c
index 900de2b3cf28..532525ec88c1 100644
--- a/arch/s390/mm/hugetlbpage.c
+++ b/arch/s390/mm/hugetlbpage.c
@@ -1,7 +1,7 @@
/*
* IBM System z Huge TLB Page Support for Kernel.
*
- * Copyright 2007 IBM Corp.
+ * Copyright IBM Corp. 2007
* Author(s): Gerald Schaefer <gerald.schaefer@de.ibm.com>
*/
diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c
index 2bea0605856e..6adbc082618a 100644
--- a/arch/s390/mm/init.c
+++ b/arch/s390/mm/init.c
@@ -1,8 +1,6 @@
/*
- * arch/s390/mm/init.c
- *
* S390 version
- * Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ * Copyright IBM Corp. 1999
* Author(s): Hartmut Penner (hp@de.ibm.com)
*
* Derived from "arch/i386/mm/init.c"
diff --git a/arch/s390/mm/mmap.c b/arch/s390/mm/mmap.c
index 2857c48486ea..c59a5efa58b1 100644
--- a/arch/s390/mm/mmap.c
+++ b/arch/s390/mm/mmap.c
@@ -1,6 +1,4 @@
/*
- * linux/arch/s390/mm/mmap.c
- *
* flexible mmap layout support
*
* Copyright 2003-2004 Red Hat Inc., Durham, North Carolina.
@@ -105,9 +103,15 @@ void arch_pick_mmap_layout(struct mm_struct *mm)
int s390_mmap_check(unsigned long addr, unsigned long len)
{
+ int rc;
+
if (!is_compat_task() &&
- len >= TASK_SIZE && TASK_SIZE < (1UL << 53))
- return crst_table_upgrade(current->mm, 1UL << 53);
+ len >= TASK_SIZE && TASK_SIZE < (1UL << 53)) {
+ rc = crst_table_upgrade(current->mm, 1UL << 53);
+ if (rc)
+ return rc;
+ update_mm(current->mm, current);
+ }
return 0;
}
@@ -127,6 +131,7 @@ s390_get_unmapped_area(struct file *filp, unsigned long addr,
rc = crst_table_upgrade(mm, 1UL << 53);
if (rc)
return (unsigned long) rc;
+ update_mm(mm, current);
area = arch_get_unmapped_area(filp, addr, len, pgoff, flags);
}
return area;
@@ -149,6 +154,7 @@ s390_get_unmapped_area_topdown(struct file *filp, const unsigned long addr,
rc = crst_table_upgrade(mm, 1UL << 53);
if (rc)
return (unsigned long) rc;
+ update_mm(mm, current);
area = arch_get_unmapped_area_topdown(filp, addr, len,
pgoff, flags);
}
diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c
index a3db5a3ea083..18df31d1f2c9 100644
--- a/arch/s390/mm/pgtable.c
+++ b/arch/s390/mm/pgtable.c
@@ -1,5 +1,5 @@
/*
- * Copyright IBM Corp. 2007,2011
+ * Copyright IBM Corp. 2007, 2011
* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
*/
@@ -85,7 +85,6 @@ repeat:
crst_table_free(mm, table);
if (mm->context.asce_limit < limit)
goto repeat;
- update_mm(mm, current);
return 0;
}
@@ -93,9 +92,6 @@ void crst_table_downgrade(struct mm_struct *mm, unsigned long limit)
{
pgd_t *pgd;
- if (mm->context.asce_limit <= limit)
- return;
- __tlb_flush_mm(mm);
while (mm->context.asce_limit > limit) {
pgd = mm->pgd;
switch (pgd_val(*pgd) & _REGION_ENTRY_TYPE_MASK) {
@@ -118,7 +114,6 @@ void crst_table_downgrade(struct mm_struct *mm, unsigned long limit)
mm->task_size = mm->context.asce_limit;
crst_table_free(mm, (unsigned long *) pgd);
}
- update_mm(mm, current);
}
#endif
@@ -801,7 +796,7 @@ int s390_enable_sie(void)
struct mm_struct *mm, *old_mm;
/* Do we have switched amode? If no, we cannot do sie */
- if (user_mode == HOME_SPACE_MODE)
+ if (addressing_mode == HOME_SPACE_MODE)
return -EINVAL;
/* Do we have pgstes? if yes, we are done */
diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c
index 71ae20df674e..6f896e75ab49 100644
--- a/arch/s390/mm/vmem.c
+++ b/arch/s390/mm/vmem.c
@@ -1,6 +1,4 @@
/*
- * arch/s390/mm/vmem.c
- *
* Copyright IBM Corp. 2006
* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
*/
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-01 10:05:18 +0000