hollalinux
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linux-sg2042
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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: (30 commits)
  [S390] wire up sys_perf_counter_open
  [S390] wire up sys_rt_tgsigqueueinfo
  [S390] ftrace: add system call tracer support
  [S390] ftrace: add function graph tracer support
  [S390] ftrace: add function trace mcount test support
  [S390] ftrace: add dynamic ftrace support
  [S390] kprobes: use probe_kernel_write
  [S390] maccess: arch specific probe_kernel_write() implementation
  [S390] maccess: add weak attribute to probe_kernel_write
  [S390] profile_tick called twice
  [S390] dasd: forward internal errors to dasd_sleep_on caller
  [S390] dasd: sync after async probe
  [S390] dasd: check_characteristics cleanup
  [S390] dasd: no High Performance FICON in 31-bit mode
  [S390] dcssblk: revert devt conversion
  [S390] qdio: fix access beyond ARRAY_SIZE of irq_ptr->{in,out}put_qs
  [S390] vmalloc: add vmalloc kernel parameter support
  [S390] uaccess: use might_fault() instead of might_sleep()
  [S390] 3270: lock dependency fixes
  [S390] 3270: do not register with tty_register_device
  ...
This commit is contained in:
Linus Torvalds 2009-06-12 18:18:05 -07:00
parent cd166bd0dd 310d6b6715
commit d645727bdc
57 changed files with 1328 additions and 344 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
arch/s390/Kconfig
View File

@ -82,6 +82,11 @@ config S390
select USE_GENERIC_SMP_HELPERS if SMP
select HAVE_SYSCALL_WRAPPERS
select HAVE_FUNCTION_TRACER
select HAVE_FUNCTION_TRACE_MCOUNT_TEST
select HAVE_FTRACE_MCOUNT_RECORD
select HAVE_FTRACE_SYSCALLS
select HAVE_DYNAMIC_FTRACE
select HAVE_FUNCTION_GRAPH_TRACER
select HAVE_DEFAULT_NO_SPIN_MUTEXES
select HAVE_OPROFILE
select HAVE_KPROBES
@ -567,6 +572,24 @@ bool "s390 guest support for KVM (EXPERIMENTAL)"
the KVM hypervisor. This will add detection for KVM as well as a
virtio transport. If KVM is detected, the virtio console will be
the default console.
config SECCOMP
bool "Enable seccomp to safely compute untrusted bytecode"
depends on PROC_FS
default y
help
This kernel feature is useful for number crunching applications
that may need to compute untrusted bytecode during their
execution. By using pipes or other transports made available to
the process as file descriptors supporting the read/write
syscalls, it's possible to isolate those applications in
their own address space using seccomp. Once seccomp is
enabled via /proc/<pid>/seccomp, it cannot be disabled
and the task is only allowed to execute a few safe syscalls
defined by each seccomp mode.
If unsure, say Y.
endmenu
source "net/Kconfig"

19
arch/s390/include/asm/compat.h
View File

@ -5,6 +5,7 @@
*/
#include <linux/types.h>
#include <linux/sched.h>
#include <linux/thread_info.h>
#define PSW32_MASK_PER 0x40000000UL
#define PSW32_MASK_DAT 0x04000000UL
@ -163,12 +164,28 @@ static inline compat_uptr_t ptr_to_compat(void __user *uptr)
return (u32)(unsigned long)uptr;
}
#ifdef CONFIG_COMPAT
static inline int is_compat_task(void)
{
return test_thread_flag(TIF_31BIT);
}
#else
static inline int is_compat_task(void)
{
return 0;
}
#endif
static inline void __user *compat_alloc_user_space(long len)
{
unsigned long stack;
stack = KSTK_ESP(current);
if (test_thread_flag(TIF_31BIT))
if (is_compat_task())
stack &= 0x7fffffffUL;
return (void __user *) (stack - len);
}

32
arch/s390/include/asm/cpu.h
View File

@ -1,32 +0,0 @@
/*
* include/asm-s390/cpu.h
*
* Copyright IBM Corp. 2007
* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
*/
#ifndef _ASM_S390_CPU_H_
#define _ASM_S390_CPU_H_
#include <linux/types.h>
#include <linux/percpu.h>
#include <linux/spinlock.h>
struct s390_idle_data {
spinlock_t lock;
unsigned long long idle_count;
unsigned long long idle_enter;
unsigned long long idle_time;
};
DECLARE_PER_CPU(struct s390_idle_data, s390_idle);
void vtime_start_cpu(void);
static inline void s390_idle_check(void)
{
if ((&__get_cpu_var(s390_idle))->idle_enter != 0ULL)
vtime_start_cpu();
}
#endif /* _ASM_S390_CPU_H_ */

19
arch/s390/include/asm/cputime.h
View File

@ -9,6 +9,9 @@
#ifndef _S390_CPUTIME_H
#define _S390_CPUTIME_H
#include <linux/types.h>
#include <linux/percpu.h>
#include <linux/spinlock.h>
#include <asm/div64.h>
/* We want to use full resolution of the CPU timer: 2**-12 micro-seconds. */
@ -174,8 +177,24 @@ cputime64_to_clock_t(cputime64_t cputime)
return __div(cputime, 4096000000ULL / USER_HZ);
}
struct s390_idle_data {
spinlock_t lock;
unsigned long long idle_count;
unsigned long long idle_enter;
unsigned long long idle_time;
};
DECLARE_PER_CPU(struct s390_idle_data, s390_idle);
void vtime_start_cpu(void);
cputime64_t s390_get_idle_time(int cpu);
#define arch_idle_time(cpu) s390_get_idle_time(cpu)
static inline void s390_idle_check(void)
{
if ((&__get_cpu_var(s390_idle))->idle_enter != 0ULL)
vtime_start_cpu();
}
#endif /* _S390_CPUTIME_H */

21
arch/s390/include/asm/ftrace.h
View File

@ -2,7 +2,28 @@
#define _ASM_S390_FTRACE_H
#ifndef __ASSEMBLY__
extern void _mcount(void);
extern unsigned long ftrace_dyn_func;
struct dyn_arch_ftrace { };
#define MCOUNT_ADDR ((long)_mcount)
#ifdef CONFIG_64BIT
#define MCOUNT_OFFSET_RET 18
#define MCOUNT_INSN_SIZE 24
#define MCOUNT_OFFSET 14
#else
#define MCOUNT_OFFSET_RET 26
#define MCOUNT_INSN_SIZE 30
#define MCOUNT_OFFSET 8
#endif
static inline unsigned long ftrace_call_adjust(unsigned long addr)
{
return addr - MCOUNT_OFFSET;
}
#endif /* __ASSEMBLY__ */
#endif /* _ASM_S390_FTRACE_H */

9
arch/s390/include/asm/lowcore.h
View File

@ -30,6 +30,7 @@
#define __LC_SUBCHANNEL_NR 0x00ba
#define __LC_IO_INT_PARM 0x00bc
#define __LC_IO_INT_WORD 0x00c0
#define __LC_STFL_FAC_LIST 0x00c8
#define __LC_MCCK_CODE 0x00e8
#define __LC_DUMP_REIPL 0x0e00
@ -67,6 +68,7 @@
#define __LC_CPUID 0x02b0
#define __LC_INT_CLOCK 0x02c8
#define __LC_MACHINE_FLAGS 0x02d8
#define __LC_FTRACE_FUNC 0x02dc
#define __LC_IRB 0x0300
#define __LC_PFAULT_INTPARM 0x0080
#define __LC_CPU_TIMER_SAVE_AREA 0x00d8
@ -112,6 +114,7 @@
#define __LC_INT_CLOCK 0x0340
#define __LC_VDSO_PER_CPU 0x0350
#define __LC_MACHINE_FLAGS 0x0358
#define __LC_FTRACE_FUNC 0x0360
#define __LC_IRB 0x0380
#define __LC_PASTE 0x03c0
#define __LC_PFAULT_INTPARM 0x11b8
@ -280,7 +283,8 @@ struct _lowcore
__u64 int_clock; /* 0x02c8 */
__u64 clock_comparator; /* 0x02d0 */
__u32 machine_flags; /* 0x02d8 */
__u8 pad_0x02dc[0x0300-0x02dc]; /* 0x02dc */
__u32 ftrace_func; /* 0x02dc */
__u8 pad_0x02f0[0x0300-0x02f0]; /* 0x02f0 */
/* Interrupt response block */
__u8 irb[64]; /* 0x0300 */
@ -385,7 +389,8 @@ struct _lowcore
__u64 clock_comparator; /* 0x0348 */
__u64 vdso_per_cpu_data; /* 0x0350 */
__u64 machine_flags; /* 0x0358 */
__u8 pad_0x0360[0x0380-0x0360]; /* 0x0360 */
__u64 ftrace_func; /* 0x0360 */
__u8 pad_0x0368[0x0380-0x0368]; /* 0x0368 */
/* Interrupt response block. */
__u8 irb[64]; /* 0x0380 */

7
arch/s390/include/asm/pgtable.h
View File

@ -112,12 +112,15 @@ extern char empty_zero_page[PAGE_SIZE];
* effect, this also makes sure that 64 bit module code cannot be used
* as system call address.
*/
extern unsigned long VMALLOC_START;
#ifndef __s390x__
#define VMALLOC_START 0x78000000UL
#define VMALLOC_SIZE (96UL << 20)
#define VMALLOC_END 0x7e000000UL
#define VMEM_MAP_END 0x80000000UL
#else /* __s390x__ */
#define VMALLOC_START 0x3e000000000UL
#define VMALLOC_SIZE (1UL << 30)
#define VMALLOC_END 0x3e040000000UL
#define VMEM_MAP_END 0x40000000000UL
#endif /* __s390x__ */

16
arch/s390/include/asm/seccomp.h Normal file
View File

@ -0,0 +1,16 @@
#ifndef _ASM_S390_SECCOMP_H
#define _ASM_S390_SECCOMP_H
#include <linux/unistd.h>
#define __NR_seccomp_read __NR_read
#define __NR_seccomp_write __NR_write
#define __NR_seccomp_exit __NR_exit
#define __NR_seccomp_sigreturn __NR_sigreturn
#define __NR_seccomp_read_32 __NR_read
#define __NR_seccomp_write_32 __NR_write
#define __NR_seccomp_exit_32 __NR_exit
#define __NR_seccomp_sigreturn_32 __NR_sigreturn
#endif /* _ASM_S390_SECCOMP_H */

19
arch/s390/include/asm/spinlock.h
View File

@ -122,8 +122,10 @@ static inline void __raw_spin_unlock(raw_spinlock_t *lp)
#define __raw_write_can_lock(x) ((x)->lock == 0)
extern void _raw_read_lock_wait(raw_rwlock_t *lp);
extern void _raw_read_lock_wait_flags(raw_rwlock_t *lp, unsigned long flags);
extern int _raw_read_trylock_retry(raw_rwlock_t *lp);
extern void _raw_write_lock_wait(raw_rwlock_t *lp);
extern void _raw_write_lock_wait_flags(raw_rwlock_t *lp, unsigned long flags);
extern int _raw_write_trylock_retry(raw_rwlock_t *lp);
static inline void __raw_read_lock(raw_rwlock_t *rw)
@ -134,6 +136,14 @@ static inline void __raw_read_lock(raw_rwlock_t *rw)
_raw_read_lock_wait(rw);
}
static inline void __raw_read_lock_flags(raw_rwlock_t *rw, unsigned long flags)
{
unsigned int old;
old = rw->lock & 0x7fffffffU;
if (_raw_compare_and_swap(&rw->lock, old, old + 1) != old)
_raw_read_lock_wait_flags(rw, flags);
}
static inline void __raw_read_unlock(raw_rwlock_t *rw)
{
unsigned int old, cmp;
@ -151,6 +161,12 @@ static inline void __raw_write_lock(raw_rwlock_t *rw)
_raw_write_lock_wait(rw);
}
static inline void __raw_write_lock_flags(raw_rwlock_t *rw, unsigned long flags)
{
if (unlikely(_raw_compare_and_swap(&rw->lock, 0, 0x80000000) != 0))
_raw_write_lock_wait_flags(rw, flags);
}
static inline void __raw_write_unlock(raw_rwlock_t *rw)
{
_raw_compare_and_swap(&rw->lock, 0x80000000, 0);
@ -172,9 +188,6 @@ static inline int __raw_write_trylock(raw_rwlock_t *rw)
return _raw_write_trylock_retry(rw);
}
#define __raw_read_lock_flags(lock, flags) __raw_read_lock(lock)
#define __raw_write_lock_flags(lock, flags) __raw_write_lock(lock)
#define _raw_read_relax(lock) cpu_relax()
#define _raw_write_relax(lock) cpu_relax()

1
arch/s390/include/asm/syscall.h
View File

@ -12,6 +12,7 @@
#ifndef _ASM_SYSCALL_H
#define _ASM_SYSCALL_H 1
#include <linux/sched.h>
#include <asm/ptrace.h>
static inline long syscall_get_nr(struct task_struct *task,

12
arch/s390/include/asm/thread_info.h
View File

@ -83,14 +83,16 @@ static inline struct thread_info *current_thread_info(void)
/*
* thread information flags bit numbers
*/
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
#define TIF_NOTIFY_RESUME 1 /* callback before returning to user */
#define TIF_SIGPENDING 2 /* signal pending */
#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
#define TIF_RESTART_SVC 4 /* restart svc with new svc number */
#define TIF_SYSCALL_AUDIT 5 /* syscall auditing active */
#define TIF_SINGLE_STEP 6 /* deliver sigtrap on return to user */
#define TIF_MCCK_PENDING 7 /* machine check handling is pending */
#define TIF_SYSCALL_TRACE 8 /* syscall trace active */
#define TIF_SYSCALL_AUDIT 9 /* syscall auditing active */
#define TIF_SECCOMP 10 /* secure computing */
#define TIF_SYSCALL_FTRACE 11 /* ftrace syscall instrumentation */
#define TIF_USEDFPU 16 /* FPU was used by this task this quantum (SMP) */
#define TIF_POLLING_NRFLAG 17 /* true if poll_idle() is polling
TIF_NEED_RESCHED */
@ -99,15 +101,17 @@ static inline struct thread_info *current_thread_info(void)
#define TIF_RESTORE_SIGMASK 20 /* restore signal mask in do_signal() */
#define TIF_FREEZE 21 /* thread is freezing for suspend */
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_RESTART_SVC (1<<TIF_RESTART_SVC)
#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
#define _TIF_SINGLE_STEP (1<<TIF_SINGLE_STEP)
#define _TIF_MCCK_PENDING (1<<TIF_MCCK_PENDING)
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
#define _TIF_SECCOMP (1<<TIF_SECCOMP)
#define _TIF_SYSCALL_FTRACE (1<<TIF_SYSCALL_FTRACE)
#define _TIF_USEDFPU (1<<TIF_USEDFPU)
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
#define _TIF_31BIT (1<<TIF_31BIT)

16
arch/s390/include/asm/uaccess.h
View File

@ -131,7 +131,7 @@ static inline int __get_user_fn(size_t size, const void __user *ptr, void *x)
#define put_user(x, ptr) \
({ \
might_sleep(); \
might_fault(); \
__put_user(x, ptr); \
})
@ -180,7 +180,7 @@ extern int __put_user_bad(void) __attribute__((noreturn));
#define get_user(x, ptr) \
({ \
might_sleep(); \
might_fault(); \
__get_user(x, ptr); \
})
@ -231,7 +231,7 @@ __copy_to_user(void __user *to, const void *from, unsigned long n)
static inline unsigned long __must_check
copy_to_user(void __user *to, const void *from, unsigned long n)
{
might_sleep();
might_fault();
if (access_ok(VERIFY_WRITE, to, n))
n = __copy_to_user(to, from, n);
return n;
@ -282,7 +282,7 @@ __copy_from_user(void *to, const void __user *from, unsigned long n)
static inline unsigned long __must_check
copy_from_user(void *to, const void __user *from, unsigned long n)
{
might_sleep();
might_fault();
if (access_ok(VERIFY_READ, from, n))
n = __copy_from_user(to, from, n);
else
@ -299,7 +299,7 @@ __copy_in_user(void __user *to, const void __user *from, unsigned long n)
static inline unsigned long __must_check
copy_in_user(void __user *to, const void __user *from, unsigned long n)
{
might_sleep();
might_fault();
if (__access_ok(from,n) && __access_ok(to,n))
n = __copy_in_user(to, from, n);
return n;
@ -312,7 +312,7 @@ static inline long __must_check
strncpy_from_user(char *dst, const char __user *src, long count)
{
long res = -EFAULT;
might_sleep();
might_fault();
if (access_ok(VERIFY_READ, src, 1))
res = uaccess.strncpy_from_user(count, src, dst);
return res;
@ -321,7 +321,7 @@ strncpy_from_user(char *dst, const char __user *src, long count)
static inline unsigned long
strnlen_user(const char __user * src, unsigned long n)
{
might_sleep();
might_fault();
return uaccess.strnlen_user(n, src);
}
@ -354,7 +354,7 @@ __clear_user(void __user *to, unsigned long n)
static inline unsigned long __must_check
clear_user(void __user *to, unsigned long n)
{
might_sleep();
might_fault();
if (access_ok(VERIFY_WRITE, to, n))
n = uaccess.clear_user(n, to);
return n;

4
arch/s390/include/asm/unistd.h
View File

@ -267,7 +267,9 @@
#define __NR_epoll_create1 327
#define __NR_preadv 328
#define __NR_pwritev 329
#define NR_syscalls 330
#define __NR_rt_tgsigqueueinfo 330
#define __NR_perf_counter_open 331
#define NR_syscalls 332
/*
* There are some system calls that are not present on 64 bit, some

7
arch/s390/kernel/Makefile
View File

@ -3,8 +3,9 @@
#
ifdef CONFIG_FUNCTION_TRACER
# Do not trace early boot code
# Don't trace early setup code and tracing code
CFLAGS_REMOVE_early.o = -pg
CFLAGS_REMOVE_ftrace.o = -pg
endif
#
@ -22,7 +23,7 @@ CFLAGS_sysinfo.o += -Iinclude/math-emu -Iarch/s390/math-emu -w
obj-y := bitmap.o traps.o time.o process.o base.o early.o setup.o \
processor.o sys_s390.o ptrace.o signal.o cpcmd.o ebcdic.o \
s390_ext.o debug.o irq.o ipl.o dis.o diag.o mem_detect.o \
vdso.o vtime.o sysinfo.o nmi.o
vdso.o vtime.o sysinfo.o nmi.o sclp.o
obj-y += $(if $(CONFIG_64BIT),entry64.o,entry.o)
obj-y += $(if $(CONFIG_64BIT),reipl64.o,reipl.o)
@ -41,6 +42,8 @@ obj-$(CONFIG_COMPAT) += compat_linux.o compat_signal.o \
obj-$(CONFIG_STACKTRACE) += stacktrace.o
obj-$(CONFIG_KPROBES) += kprobes.o
obj-$(CONFIG_FUNCTION_TRACER) += mcount.o
obj-$(CONFIG_DYNAMIC_FTRACE) += ftrace.o
obj-$(CONFIG_FUNCTION_GRAPH_TRACER) += ftrace.o
# Kexec part
S390_KEXEC_OBJS := machine_kexec.o crash.o

17
arch/s390/kernel/compat_wrapper.S
View File

@ -1823,3 +1823,20 @@ compat_sys_pwritev_wrapper:
llgfr %r5,%r5 # u32
llgfr %r6,%r6 # u32
jg compat_sys_pwritev # branch to system call
.globl compat_sys_rt_tgsigqueueinfo_wrapper
compat_sys_rt_tgsigqueueinfo_wrapper:
lgfr %r2,%r2 # compat_pid_t
lgfr %r3,%r3 # compat_pid_t
lgfr %r4,%r4 # int
llgtr %r5,%r5 # struct compat_siginfo *
jg compat_sys_rt_tgsigqueueinfo_wrapper # branch to system call
.globl sys_perf_counter_open_wrapper
sys_perf_counter_open_wrapper:
llgtr %r2,%r2 # const struct perf_counter_attr *
lgfr %r3,%r3 # pid_t
lgfr %r4,%r4 # int
lgfr %r5,%r5 # int
llgfr %r6,%r6 # unsigned long
jg sys_perf_counter_open # branch to system call

4
arch/s390/kernel/early.c
View File

@ -11,6 +11,7 @@
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/ctype.h>
#include <linux/ftrace.h>
#include <linux/lockdep.h>
#include <linux/module.h>
#include <linux/pfn.h>
@ -410,5 +411,8 @@ void __init startup_init(void)
sclp_facilities_detect();
detect_memory_layout(memory_chunk);
S390_lowcore.machine_flags = machine_flags;
#ifdef CONFIG_DYNAMIC_FTRACE
S390_lowcore.ftrace_func = (unsigned long)ftrace_caller;
#endif
lockdep_on();
}

7
arch/s390/kernel/entry.S
View File

@ -53,6 +53,8 @@ _TIF_WORK_SVC = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
_TIF_MCCK_PENDING | _TIF_RESTART_SVC | _TIF_SINGLE_STEP )
_TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
_TIF_MCCK_PENDING)
_TIF_SYSCALL = (_TIF_SYSCALL_TRACE>>8 | _TIF_SYSCALL_AUDIT>>8 | \
_TIF_SECCOMP>>8 | _TIF_SYSCALL_FTRACE>>8)
STACK_SHIFT = PAGE_SHIFT + THREAD_ORDER
STACK_SIZE = 1 << STACK_SHIFT
@ -265,7 +267,7 @@ sysc_do_restart:
sth %r7,SP_SVCNR(%r15)
sll %r7,2 # svc number *4
l %r8,BASED(.Lsysc_table)
tm __TI_flags+3(%r9),(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT)
tm __TI_flags+2(%r9),_TIF_SYSCALL
l %r8,0(%r7,%r8) # get system call addr.
bnz BASED(sysc_tracesys)
basr %r14,%r8 # call sys_xxxx
@ -405,7 +407,7 @@ sysc_tracego:
basr %r14,%r8 # call sys_xxx
st %r2,SP_R2(%r15) # store return value
sysc_tracenogo:
tm __TI_flags+3(%r9),(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT)
tm __TI_flags+2(%r9),_TIF_SYSCALL
bz BASED(sysc_return)
l %r1,BASED(.Ltrace_exit)
la %r2,SP_PTREGS(%r15) # load pt_regs
@ -1107,6 +1109,7 @@ cleanup_io_leave_insn:
.section .rodata, "a"
#define SYSCALL(esa,esame,emu) .long esa
.globl sys_call_table
sys_call_table:
#include "syscalls.S"
#undef SYSCALL

7
arch/s390/kernel/entry64.S
View File

@ -56,6 +56,8 @@ _TIF_WORK_SVC = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
_TIF_MCCK_PENDING | _TIF_RESTART_SVC | _TIF_SINGLE_STEP )
_TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
_TIF_MCCK_PENDING)
_TIF_SYSCALL = (_TIF_SYSCALL_TRACE>>8 | _TIF_SYSCALL_AUDIT>>8 | \
_TIF_SECCOMP>>8 | _TIF_SYSCALL_FTRACE>>8)
#define BASED(name) name-system_call(%r13)
@ -260,7 +262,7 @@ sysc_do_restart:
larl %r10,sys_call_table_emu # use 31 bit emulation system calls
sysc_noemu:
#endif
tm __TI_flags+7(%r9),(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT)
tm __TI_flags+6(%r9),_TIF_SYSCALL
lgf %r8,0(%r7,%r10) # load address of system call routine
jnz sysc_tracesys
basr %r14,%r8 # call sys_xxxx
@ -391,7 +393,7 @@ sysc_tracego:
basr %r14,%r8 # call sys_xxx
stg %r2,SP_R2(%r15) # store return value
sysc_tracenogo:
tm __TI_flags+7(%r9),(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT)
tm __TI_flags+6(%r9),_TIF_SYSCALL
jz sysc_return
la %r2,SP_PTREGS(%r15) # load pt_regs
larl %r14,sysc_return # return point is sysc_return
@ -1058,6 +1060,7 @@ cleanup_io_leave_insn:
.section .rodata, "a"
#define SYSCALL(esa,esame,emu) .long esame
.globl sys_call_table
sys_call_table:
#include "syscalls.S"
#undef SYSCALL

260
arch/s390/kernel/ftrace.c Normal file
View File

@ -0,0 +1,260 @@
/*
* Dynamic function tracer architecture backend.
*
* Copyright IBM Corp. 2009
*
* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>,
*
*/
#include <linux/hardirq.h>
#include <linux/uaccess.h>
#include <linux/ftrace.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <trace/syscall.h>
#include <asm/lowcore.h>
#ifdef CONFIG_DYNAMIC_FTRACE
void ftrace_disable_code(void);
void ftrace_disable_return(void);
void ftrace_call_code(void);
void ftrace_nop_code(void);
#define FTRACE_INSN_SIZE 4
#ifdef CONFIG_64BIT
asm(
" .align 4\n"
"ftrace_disable_code:\n"
" j 0f\n"
" .word 0x0024\n"
" lg %r1,"__stringify(__LC_FTRACE_FUNC)"\n"
" basr %r14,%r1\n"
"ftrace_disable_return:\n"
" lg %r14,8(15)\n"
" lgr %r0,%r0\n"
"0:\n");
asm(
" .align 4\n"
"ftrace_nop_code:\n"
" j .+"__stringify(MCOUNT_INSN_SIZE)"\n");
asm(
" .align 4\n"
"ftrace_call_code:\n"
" stg %r14,8(%r15)\n");
#else /* CONFIG_64BIT */
asm(
" .align 4\n"
"ftrace_disable_code:\n"
" j 0f\n"
" l %r1,"__stringify(__LC_FTRACE_FUNC)"\n"
" basr %r14,%r1\n"
"ftrace_disable_return:\n"
" l %r14,4(%r15)\n"
" j 0f\n"
" bcr 0,%r7\n"
" bcr 0,%r7\n"
" bcr 0,%r7\n"
" bcr 0,%r7\n"
" bcr 0,%r7\n"
" bcr 0,%r7\n"
"0:\n");
asm(
" .align 4\n"
"ftrace_nop_code:\n"
" j .+"__stringify(MCOUNT_INSN_SIZE)"\n");
asm(
" .align 4\n"
"ftrace_call_code:\n"
" st %r14,4(%r15)\n");
#endif /* CONFIG_64BIT */
static int ftrace_modify_code(unsigned long ip,
void *old_code, int old_size,
void *new_code, int new_size)
{
unsigned char replaced[MCOUNT_INSN_SIZE];
/*
* Note: Due to modules code can disappear and change.
* We need to protect against faulting as well as code
* changing. We do this by using the probe_kernel_*
* functions.
* This however is just a simple sanity check.
*/
if (probe_kernel_read(replaced, (void *)ip, old_size))
return -EFAULT;
if (memcmp(replaced, old_code, old_size) != 0)
return -EINVAL;
if (probe_kernel_write((void *)ip, new_code, new_size))
return -EPERM;
return 0;
}
static int ftrace_make_initial_nop(struct module *mod, struct dyn_ftrace *rec,
unsigned long addr)
{
return ftrace_modify_code(rec->ip,
ftrace_call_code, FTRACE_INSN_SIZE,
ftrace_disable_code, MCOUNT_INSN_SIZE);
}
int ftrace_make_nop(struct module *mod, struct dyn_ftrace *rec,
unsigned long addr)
{
if (addr == MCOUNT_ADDR)
return ftrace_make_initial_nop(mod, rec, addr);
return ftrace_modify_code(rec->ip,
ftrace_call_code, FTRACE_INSN_SIZE,
ftrace_nop_code, FTRACE_INSN_SIZE);
}
int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
{
return ftrace_modify_code(rec->ip,
ftrace_nop_code, FTRACE_INSN_SIZE,
ftrace_call_code, FTRACE_INSN_SIZE);
}
int ftrace_update_ftrace_func(ftrace_func_t func)
{
ftrace_dyn_func = (unsigned long)func;
return 0;
}
int __init ftrace_dyn_arch_init(void *data)
{
*(unsigned long *)data = 0;
return 0;
}
#endif /* CONFIG_DYNAMIC_FTRACE */
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
#ifdef CONFIG_DYNAMIC_FTRACE
/*
* Patch the kernel code at ftrace_graph_caller location:
* The instruction there is branch relative on condition. The condition mask
* is either all ones (always branch aka disable ftrace_graph_caller) or all
* zeroes (nop aka enable ftrace_graph_caller).
* Instruction format for brc is a7m4xxxx where m is the condition mask.
*/
int ftrace_enable_ftrace_graph_caller(void)
{
unsigned short opcode = 0xa704;
return probe_kernel_write(ftrace_graph_caller, &opcode, sizeof(opcode));
}
int ftrace_disable_ftrace_graph_caller(void)
{
unsigned short opcode = 0xa7f4;
return probe_kernel_write(ftrace_graph_caller, &opcode, sizeof(opcode));
}
static inline unsigned long ftrace_mcount_call_adjust(unsigned long addr)
{
return addr - (ftrace_disable_return - ftrace_disable_code);
}
#else /* CONFIG_DYNAMIC_FTRACE */
static inline unsigned long ftrace_mcount_call_adjust(unsigned long addr)
{
return addr - MCOUNT_OFFSET_RET;
}
#endif /* CONFIG_DYNAMIC_FTRACE */
/*
* Hook the return address and push it in the stack of return addresses
* in current thread info.
*/
unsigned long prepare_ftrace_return(unsigned long ip, unsigned long parent)
{
struct ftrace_graph_ent trace;
/* Nmi's are currently unsupported. */
if (unlikely(in_nmi()))
goto out;
if (unlikely(atomic_read(&current->tracing_graph_pause)))
goto out;
if (ftrace_push_return_trace(parent, ip, &trace.depth) == -EBUSY)
goto out;
trace.func = ftrace_mcount_call_adjust(ip) & PSW_ADDR_INSN;
/* Only trace if the calling function expects to. */
if (!ftrace_graph_entry(&trace)) {
current->curr_ret_stack--;
goto out;
}
parent = (unsigned long)return_to_handler;
out:
return parent;
}
#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
#ifdef CONFIG_FTRACE_SYSCALLS
extern unsigned long __start_syscalls_metadata[];
extern unsigned long __stop_syscalls_metadata[];
extern unsigned int sys_call_table[];
static struct syscall_metadata **syscalls_metadata;
struct syscall_metadata *syscall_nr_to_meta(int nr)
{
if (!syscalls_metadata || nr >= NR_syscalls || nr < 0)
return NULL;
return syscalls_metadata[nr];
}
static struct syscall_metadata *find_syscall_meta(unsigned long syscall)
{
struct syscall_metadata *start;
struct syscall_metadata *stop;
char str[KSYM_SYMBOL_LEN];
start = (struct syscall_metadata *)__start_syscalls_metadata;
stop = (struct syscall_metadata *)__stop_syscalls_metadata;
kallsyms_lookup(syscall, NULL, NULL, NULL, str);
for ( ; start < stop; start++) {
if (start->name && !strcmp(start->name + 3, str + 3))
return start;
}
return NULL;
}
void arch_init_ftrace_syscalls(void)
{
struct syscall_metadata *meta;
int i;
static atomic_t refs;
if (atomic_inc_return(&refs) != 1)
goto out;
syscalls_metadata = kzalloc(sizeof(*syscalls_metadata) * NR_syscalls,
GFP_KERNEL);
if (!syscalls_metadata)
goto out;
for (i = 0; i < NR_syscalls; i++) {
meta = find_syscall_meta((unsigned long)sys_call_table[i]);
syscalls_metadata[i] = meta;
}
return;
out:
atomic_dec(&refs);
}
#endif

65
arch/s390/kernel/head.S
View File

@ -1,7 +1,5 @@
/*
* arch/s390/kernel/head.S
*
* Copyright (C) IBM Corp. 1999,2006
* Copyright IBM Corp. 1999,2009
*
* Author(s): Hartmut Penner <hp@de.ibm.com>
* Martin Schwidefsky <schwidefsky@de.ibm.com>
@ -479,27 +477,58 @@ startup:basr %r13,0 # get base
mvc __LC_LAST_UPDATE_TIMER(8),6f-.LPG0(%r13)
mvc __LC_EXIT_TIMER(8),5f-.LPG0(%r13)
#ifndef CONFIG_MARCH_G5
# check processor version against MARCH_{G5,Z900,Z990,Z9_109,Z10}
stidp __LC_CPUID # store cpuid
lhi %r0,(3f-2f) / 2
la %r1,2f-.LPG0(%r13)
0: clc __LC_CPUID+4(2),0(%r1)
jne 3f
lpsw 1f-.LPG0(13) # machine type not good enough, crash
# check capabilities against MARCH_{G5,Z900,Z990,Z9_109,Z10}
xc __LC_STFL_FAC_LIST(8),__LC_STFL_FAC_LIST
stfl __LC_STFL_FAC_LIST # store facility list
tm __LC_STFL_FAC_LIST,0x01 # stfle available ?
jz 0f
la %r0,0
.insn s,0xb2b00000,__LC_STFL_FAC_LIST # store facility list extended
0: l %r0,__LC_STFL_FAC_LIST
n %r0,2f+8-.LPG0(%r13)
cl %r0,2f+8-.LPG0(%r13)
jne 1f
l %r0,__LC_STFL_FAC_LIST+4
n %r0,2f+12-.LPG0(%r13)
cl %r0,2f+12-.LPG0(%r13)
je 3f
1: l %r15,.Lstack-.LPG0(%r13)
ahi %r15,1<<(PAGE_SHIFT+THREAD_ORDER) # init_task_union+THREAD_SIZE
ahi %r15,-96
la %r2,.Lals_string-.LPG0(%r13)
l %r3,.Lsclp_print-.LPG0(%r13)
basr %r14,%r3
lpsw 2f-.LPG0(%r13) # machine type not good enough, crash
.Lals_string:
.asciz "The Linux kernel requires more recent processor hardware"
.Lsclp_print:
.long _sclp_print_early
.Lstack:
.long init_thread_union
.align 16
1: .long 0x000a0000,0x00000000
2:
2: .long 0x000a0000,0x8badcccc
#if defined(CONFIG_64BIT)
#if defined(CONFIG_MARCH_Z10)
.short 0x9672, 0x2064, 0x2066, 0x2084, 0x2086, 0x2094, 0x2096
.long 0xc100efe3, 0xf0680000
#elif defined(CONFIG_MARCH_Z9_109)
.short 0x9672, 0x2064, 0x2066, 0x2084, 0x2086
.long 0xc100efc3, 0x00000000
#elif defined(CONFIG_MARCH_Z990)
.short 0x9672, 0x2064, 0x2066
.long 0xc0002000, 0x00000000
#elif defined(CONFIG_MARCH_Z900)
.short 0x9672
.long 0xc0000000, 0x00000000
#endif
3: la %r1,2(%r1)
brct %r0,0b
#else
#if defined(CONFIG_MARCH_Z10)
.long 0x8100c880, 0x00000000
#elif defined(CONFIG_MARCH_Z9_109)
.long 0x8100c880, 0x00000000
#elif defined(CONFIG_MARCH_Z990)
.long 0x80002000, 0x00000000
#elif defined(CONFIG_MARCH_Z900)
.long 0x80000000, 0x00000000
#endif
#endif
3:
#endif
l %r13,4f-.LPG0(%r13)

31
arch/s390/kernel/kprobes.c
View File

@ -25,9 +25,9 @@
#include <linux/preempt.h>
#include <linux/stop_machine.h>
#include <linux/kdebug.h>
#include <linux/uaccess.h>
#include <asm/cacheflush.h>
#include <asm/sections.h>
#include <asm/uaccess.h>
#include <linux/module.h>
DEFINE_PER_CPU(struct kprobe *, current_kprobe) = NULL;
@ -155,35 +155,8 @@ void __kprobes get_instruction_type(struct arch_specific_insn *ainsn)
static int __kprobes swap_instruction(void *aref)
{
struct ins_replace_args *args = aref;
u32 *addr;
u32 instr;
int err = -EFAULT;
/*
* Text segment is read-only, hence we use stura to bypass dynamic
* address translation to exchange the instruction. Since stura
* always operates on four bytes, but we only want to exchange two
* bytes do some calculations to get things right. In addition we
* shall not cross any page boundaries (vmalloc area!) when writing
* the new instruction.
*/
addr = (u32 *)((unsigned long)args->ptr & -4UL);
if ((unsigned long)args->ptr & 2)
instr = ((*addr) & 0xffff0000) | args->new;
else
instr = ((*addr) & 0x0000ffff) | args->new << 16;
asm volatile(
" lra %1,0(%1)\n"
"0: stura %2,%1\n"
"1: la %0,0\n"
"2:\n"
EX_TABLE(0b,2b)
: "+d" (err)
: "a" (addr), "d" (instr)
: "memory", "cc");
return err;
return probe_kernel_write(args->ptr, &args->new, sizeof(args->new));
}
void __kprobes arch_arm_kprobe(struct kprobe *p)

216
arch/s390/kernel/mcount.S
View File

@ -1,5 +1,5 @@
/*
* Copyright IBM Corp. 2008
* Copyright IBM Corp. 2008,2009
*
* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>,
*
@ -7,36 +7,64 @@
#include <asm/asm-offsets.h>
#ifndef CONFIG_64BIT
.globl _mcount
_mcount:
stm %r0,%r5,8(%r15)
st %r14,56(%r15)
lr %r1,%r15
ahi %r15,-96
l %r3,100(%r15)
la %r2,0(%r14)
st %r1,__SF_BACKCHAIN(%r15)
la %r3,0(%r3)
bras %r14,0f
.long ftrace_trace_function
0: l %r14,0(%r14)
l %r14,0(%r14)
basr %r14,%r14
ahi %r15,96
lm %r0,%r5,8(%r15)
l %r14,56(%r15)
br %r14
.globl ftrace_stub
.globl ftrace_stub
ftrace_stub:
br %r14
#else /* CONFIG_64BIT */
#ifdef CONFIG_64BIT
.globl _mcount
#ifdef CONFIG_DYNAMIC_FTRACE
.globl _mcount
_mcount:
stmg %r0,%r5,16(%r15)
br %r14
.globl ftrace_caller
ftrace_caller:
larl %r1,function_trace_stop
icm %r1,0xf,0(%r1)
bnzr %r14
stmg %r2,%r5,32(%r15)
stg %r14,112(%r15)
lgr %r1,%r15
aghi %r15,-160
stg %r1,__SF_BACKCHAIN(%r15)
lgr %r2,%r14
lg %r3,168(%r15)
larl %r14,ftrace_dyn_func
lg %r14,0(%r14)
basr %r14,%r14
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
.globl ftrace_graph_caller
ftrace_graph_caller:
# This unconditional branch gets runtime patched. Change only if
# you know what you are doing. See ftrace_enable_graph_caller().
j 0f
lg %r2,272(%r15)
lg %r3,168(%r15)
brasl %r14,prepare_ftrace_return
stg %r2,168(%r15)
0:
#endif
aghi %r15,160
lmg %r2,%r5,32(%r15)
lg %r14,112(%r15)
br %r14
.data
.globl ftrace_dyn_func
ftrace_dyn_func:
.quad ftrace_stub
.previous
#else /* CONFIG_DYNAMIC_FTRACE */
.globl _mcount
_mcount:
larl %r1,function_trace_stop
icm %r1,0xf,0(%r1)
bnzr %r14
stmg %r2,%r5,32(%r15)
stg %r14,112(%r15)
lgr %r1,%r15
aghi %r15,-160
@ -46,13 +74,143 @@ _mcount:
larl %r14,ftrace_trace_function
lg %r14,0(%r14)
basr %r14,%r14
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
lg %r2,272(%r15)
lg %r3,168(%r15)
brasl %r14,prepare_ftrace_return
stg %r2,168(%r15)
#endif
aghi %r15,160
lmg %r0,%r5,16(%r15)
lmg %r2,%r5,32(%r15)
lg %r14,112(%r15)
br %r14
.globl ftrace_stub
ftrace_stub:
#endif /* CONFIG_DYNAMIC_FTRACE */
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
.globl return_to_handler
return_to_handler:
stmg %r2,%r5,32(%r15)
lgr %r1,%r15
aghi %r15,-160
stg %r1,__SF_BACKCHAIN(%r15)
brasl %r14,ftrace_return_to_handler
aghi %r15,160
lgr %r14,%r2
lmg %r2,%r5,32(%r15)
br %r14
#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
#else /* CONFIG_64BIT */
#ifdef CONFIG_DYNAMIC_FTRACE
.globl _mcount
_mcount:
br %r14
.globl ftrace_caller
ftrace_caller:
stm %r2,%r5,16(%r15)
bras %r1,2f
0: .long ftrace_trace_function
1: .long function_trace_stop
2: l %r2,1b-0b(%r1)
icm %r2,0xf,0(%r2)
jnz 3f
st %r14,56(%r15)
lr %r0,%r15
ahi %r15,-96
l %r3,100(%r15)
la %r2,0(%r14)
st %r0,__SF_BACKCHAIN(%r15)
la %r3,0(%r3)
l %r14,0b-0b(%r1)
l %r14,0(%r14)
basr %r14,%r14
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
.globl ftrace_graph_caller
ftrace_graph_caller:
# This unconditional branch gets runtime patched. Change only if
# you know what you are doing. See ftrace_enable_graph_caller().
j 1f
bras %r1,0f
.long prepare_ftrace_return
0: l %r2,152(%r15)
l %r4,0(%r1)
l %r3,100(%r15)
basr %r14,%r4
st %r2,100(%r15)
1:
#endif
ahi %r15,96
l %r14,56(%r15)
3: lm %r2,%r5,16(%r15)
br %r14
.data
.globl ftrace_dyn_func
ftrace_dyn_func:
.long ftrace_stub
.previous
#else /* CONFIG_DYNAMIC_FTRACE */
.globl _mcount
_mcount:
stm %r2,%r5,16(%r15)
bras %r1,2f
0: .long ftrace_trace_function
1: .long function_trace_stop
2: l %r2,1b-0b(%r1)
icm %r2,0xf,0(%r2)
jnz 3f
st %r14,56(%r15)
lr %r0,%r15
ahi %r15,-96
l %r3,100(%r15)
la %r2,0(%r14)
st %r0,__SF_BACKCHAIN(%r15)
la %r3,0(%r3)
l %r14,0b-0b(%r1)
l %r14,0(%r14)
basr %r14,%r14
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
bras %r1,0f
.long prepare_ftrace_return
0: l %r2,152(%r15)
l %r4,0(%r1)
l %r3,100(%r15)
basr %r14,%r4
st %r2,100(%r15)
#endif
ahi %r15,96
l %r14,56(%r15)
3: lm %r2,%r5,16(%r15)
br %r14
#endif /* CONFIG_DYNAMIC_FTRACE */
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
.globl return_to_handler
return_to_handler:
stm %r2,%r5,16(%r15)
st %r14,56(%r15)
lr %r0,%r15
ahi %r15,-96
st %r0,__SF_BACKCHAIN(%r15)
bras %r1,0f
.long ftrace_return_to_handler
0: l %r2,0b-0b(%r1)
basr %r14,%r2
lr %r14,%r2
ahi %r15,96
lm %r2,%r5,16(%r15)
br %r14
#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
#endif /* CONFIG_64BIT */

2
arch/s390/kernel/nmi.c
View File

@ -16,7 +16,7 @@
#include <asm/lowcore.h>
#include <asm/smp.h>
#include <asm/etr.h>
#include <asm/cpu.h>
#include <asm/cputime.h>
#include <asm/nmi.h>
#include <asm/crw.h>

3
arch/s390/kernel/process.c
View File

@ -32,6 +32,7 @@
#include <linux/elfcore.h>
#include <linux/kernel_stat.h>
#include <linux/syscalls.h>
#include <asm/compat.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
#include <asm/system.h>
@ -204,7 +205,7 @@ int copy_thread(unsigned long clone_flags, unsigned long new_stackp,
save_fp_regs(&p->thread.fp_regs);
/* Set a new TLS ? */
if (clone_flags & CLONE_SETTLS) {
if (test_thread_flag(TIF_31BIT)) {
if (is_compat_task()) {
p->thread.acrs[0] = (unsigned int) regs->gprs[6];
} else {
p->thread.acrs[0] = (unsigned int)(regs->gprs[6] >> 32);

23
arch/s390/kernel/ptrace.c
View File

@ -36,7 +36,9 @@
#include <linux/elf.h>
#include <linux/regset.h>
#include <linux/tracehook.h>
#include <linux/seccomp.h>
#include <trace/syscall.h>
#include <asm/compat.h>
#include <asm/segment.h>
#include <asm/page.h>
#include <asm/pgtable.h>
@ -69,7 +71,7 @@ FixPerRegisters(struct task_struct *task)
if (per_info->single_step) {
per_info->control_regs.bits.starting_addr = 0;
#ifdef CONFIG_COMPAT
if (test_thread_flag(TIF_31BIT))
if (is_compat_task())
per_info->control_regs.bits.ending_addr = 0x7fffffffUL;
else
#endif
@ -482,8 +484,7 @@ static int peek_user_compat(struct task_struct *child,
{
__u32 tmp;
if (!test_thread_flag(TIF_31BIT) ||
(addr & 3) || addr > sizeof(struct user) - 3)
if (!is_compat_task() || (addr & 3) || addr > sizeof(struct user) - 3)
return -EIO;
tmp = __peek_user_compat(child, addr);
@ -584,8 +585,7 @@ static int __poke_user_compat(struct task_struct *child,
static int poke_user_compat(struct task_struct *child,
addr_t addr, addr_t data)
{
if (!test_thread_flag(TIF_31BIT) ||
(addr & 3) || addr > sizeof(struct user32) - 3)
if (!is_compat_task() || (addr & 3) || addr > sizeof(struct user32) - 3)
return -EIO;
return __poke_user_compat(child, addr, data);
@ -642,6 +642,9 @@ asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
{
long ret;
/* Do the secure computing check first. */
secure_computing(regs->gprs[2]);
/*
* The sysc_tracesys code in entry.S stored the system
* call number to gprs[2].
@ -659,8 +662,11 @@ asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
ret = -1;
}
if (unlikely(test_thread_flag(TIF_SYSCALL_FTRACE)))
ftrace_syscall_enter(regs);
if (unlikely(current->audit_context))
audit_syscall_entry(test_thread_flag(TIF_31BIT) ?
audit_syscall_entry(is_compat_task() ?
AUDIT_ARCH_S390 : AUDIT_ARCH_S390X,
regs->gprs[2], regs->orig_gpr2,
regs->gprs[3], regs->gprs[4],
@ -674,6 +680,9 @@ asmlinkage void do_syscall_trace_exit(struct pt_regs *regs)
audit_syscall_exit(AUDITSC_RESULT(regs->gprs[2]),
regs->gprs[2]);
if (unlikely(test_thread_flag(TIF_SYSCALL_FTRACE)))
ftrace_syscall_exit(regs);
if (test_thread_flag(TIF_SYSCALL_TRACE))
tracehook_report_syscall_exit(regs, 0);
}

5
arch/s390/kernel/s390_ext.c
View File

@ -10,10 +10,11 @@
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/ftrace.h>
#include <linux/errno.h>
#include <linux/kernel_stat.h>
#include <linux/interrupt.h>
#include <asm/cpu.h>
#include <asm/cputime.h>
#include <asm/lowcore.h>
#include <asm/s390_ext.h>
#include <asm/irq_regs.h>
@ -112,7 +113,7 @@ int unregister_early_external_interrupt(__u16 code, ext_int_handler_t handler,
return 0;
}
void do_extint(struct pt_regs *regs, unsigned short code)
void __irq_entry do_extint(struct pt_regs *regs, unsigned short code)
{
ext_int_info_t *p;
int index;

327
arch/s390/kernel/sclp.S Normal file
View File

@ -0,0 +1,327 @@
/*
* Mini SCLP driver.
*
* Copyright IBM Corp. 2004,2009
*
* Author(s): Peter Oberparleiter <Peter.Oberparleiter@de.ibm.com>,
* Heiko Carstens <heiko.carstens@de.ibm.com>,
*
*/
LC_EXT_NEW_PSW = 0x58 # addr of ext int handler
LC_EXT_INT_PARAM = 0x80 # addr of ext int parameter
LC_EXT_INT_CODE = 0x86 # addr of ext int code
#
# Subroutine which waits synchronously until either an external interruption
# or a timeout occurs.
#
# Parameters:
# R2 = 0 for no timeout, non-zero for timeout in (approximated) seconds
#
# Returns:
# R2 = 0 on interrupt, 2 on timeout
# R3 = external interruption parameter if R2=0
#
.section ".init.text","ax"
_sclp_wait_int:
stm %r6,%r15,24(%r15) # save registers
basr %r13,0 # get base register
.LbaseS1:
ahi %r15,-96 # create stack frame
la %r8,LC_EXT_NEW_PSW # register int handler
mvc .LoldpswS1-.LbaseS1(8,%r13),0(%r8)
mvc 0(8,%r8),.LextpswS1-.LbaseS1(%r13)
lhi %r6,0x0200 # cr mask for ext int (cr0.54)
ltr %r2,%r2
jz .LsetctS1
ahi %r6,0x0800 # cr mask for clock int (cr0.52)
stck .LtimeS1-.LbaseS1(%r13) # initiate timeout
al %r2,.LtimeS1-.LbaseS1(%r13)
st %r2,.LtimeS1-.LbaseS1(%r13)
sckc .LtimeS1-.LbaseS1(%r13)
.LsetctS1:
stctl %c0,%c0,.LctlS1-.LbaseS1(%r13) # enable required interrupts
l %r0,.LctlS1-.LbaseS1(%r13)
lhi %r1,~(0x200 | 0x800) # clear old values
nr %r1,%r0
or %r1,%r6 # set new value
st %r1,.LctlS1-.LbaseS1(%r13)
lctl %c0,%c0,.LctlS1-.LbaseS1(%r13)
st %r0,.LctlS1-.LbaseS1(%r13)
lhi %r2,2 # return code for timeout
.LloopS1:
lpsw .LwaitpswS1-.LbaseS1(%r13) # wait until interrupt
.LwaitS1:
lh %r7,LC_EXT_INT_CODE
chi %r7,0x1004 # timeout?
je .LtimeoutS1
chi %r7,0x2401 # service int?
jne .LloopS1
sr %r2,%r2
l %r3,LC_EXT_INT_PARAM
.LtimeoutS1:
lctl %c0,%c0,.LctlS1-.LbaseS1(%r13) # restore interrupt setting
# restore old handler
mvc 0(8,%r8),.LoldpswS1-.LbaseS1(%r13)
lm %r6,%r15,120(%r15) # restore registers
br %r14 # return to caller
.align 8
.LoldpswS1:
.long 0, 0 # old ext int PSW
.LextpswS1:
.long 0x00080000, 0x80000000+.LwaitS1 # PSW to handle ext int
.LwaitpswS1:
.long 0x010a0000, 0x00000000+.LloopS1 # PSW to wait for ext int
.LtimeS1:
.quad 0 # current time
.LctlS1:
.long 0 # CT0 contents
#
# Subroutine to synchronously issue a service call.
#
# Parameters:
# R2 = command word
# R3 = sccb address
#
# Returns:
# R2 = 0 on success, 1 on failure
# R3 = sccb response code if R2 = 0
#
_sclp_servc:
stm %r6,%r15,24(%r15) # save registers
ahi %r15,-96 # create stack frame
lr %r6,%r2 # save command word
lr %r7,%r3 # save sccb address
.LretryS2:
lhi %r2,1 # error return code
.insn rre,0xb2200000,%r6,%r7 # servc
brc 1,.LendS2 # exit if not operational
brc 8,.LnotbusyS2 # go on if not busy
sr %r2,%r2 # wait until no longer busy
bras %r14,_sclp_wait_int
j .LretryS2 # retry
.LnotbusyS2:
sr %r2,%r2 # wait until result
bras %r14,_sclp_wait_int
sr %r2,%r2
lh %r3,6(%r7)
.LendS2:
lm %r6,%r15,120(%r15) # restore registers
br %r14
#
# Subroutine to set up the SCLP interface.
#
# Parameters:
# R2 = 0 to activate, non-zero to deactivate
#
# Returns:
# R2 = 0 on success, non-zero on failure
#
_sclp_setup:
stm %r6,%r15,24(%r15) # save registers
ahi %r15,-96 # create stack frame
basr %r13,0 # get base register
.LbaseS3:
l %r6,.LsccbS0-.LbaseS3(%r13) # prepare init mask sccb
mvc 0(.LinitendS3-.LinitsccbS3,%r6),.LinitsccbS3-.LbaseS3(%r13)
ltr %r2,%r2 # initialization?
jz .LdoinitS3 # go ahead
# clear masks
xc .LinitmaskS3-.LinitsccbS3(8,%r6),.LinitmaskS3-.LinitsccbS3(%r6)
.LdoinitS3:
l %r2,.LwritemaskS3-.LbaseS3(%r13)# get command word
lr %r3,%r6 # get sccb address
bras %r14,_sclp_servc # issue service call
ltr %r2,%r2 # servc successful?
jnz .LerrorS3
chi %r3,0x20 # write mask successful?
jne .LerrorS3
# check masks
la %r2,.LinitmaskS3-.LinitsccbS3(%r6)
l %r1,0(%r2) # receive mask ok?
n %r1,12(%r2)
cl %r1,0(%r2)
jne .LerrorS3
l %r1,4(%r2) # send mask ok?
n %r1,8(%r2)
cl %r1,4(%r2)
sr %r2,%r2
je .LendS3
.LerrorS3:
lhi %r2,1 # error return code
.LendS3:
lm %r6,%r15,120(%r15) # restore registers
br %r14
.LwritemaskS3:
.long 0x00780005 # SCLP command for write mask
.LinitsccbS3:
.word .LinitendS3-.LinitsccbS3
.byte 0,0,0,0
.word 0
.word 0
.word 4
.LinitmaskS3:
.long 0x80000000
.long 0x40000000
.long 0
.long 0
.LinitendS3:
#
# Subroutine which prints a given text to the SCLP console.
#
# Parameters:
# R2 = address of nil-terminated ASCII text
#
# Returns:
# R2 = 0 on success, 1 on failure
#
_sclp_print:
stm %r6,%r15,24(%r15) # save registers
ahi %r15,-96 # create stack frame
basr %r13,0 # get base register
.LbaseS4:
l %r8,.LsccbS0-.LbaseS4(%r13) # prepare write data sccb
mvc 0(.LmtoS4-.LwritesccbS4,%r8),.LwritesccbS4-.LbaseS4(%r13)
la %r7,.LmtoS4-.LwritesccbS4(%r8) # current mto addr
sr %r0,%r0
l %r10,.Lascebc-.LbaseS4(%r13) # address of translation table
.LinitmtoS4:
# initialize mto
mvc 0(.LmtoendS4-.LmtoS4,%r7),.LmtoS4-.LbaseS4(%r13)
lhi %r6,.LmtoendS4-.LmtoS4 # current mto length
.LloopS4:
ic %r0,0(%r2) # get character
ahi %r2,1
ltr %r0,%r0 # end of string?
jz .LfinalizemtoS4
chi %r0,0x15 # end of line (NL)?
jz .LfinalizemtoS4
stc %r0,0(%r6,%r7) # copy to mto
la %r11,0(%r6,%r7)
tr 0(1,%r11),0(%r10) # translate to EBCDIC
ahi %r6,1
j .LloopS4
.LfinalizemtoS4:
sth %r6,0(%r7) # update mto length
lh %r9,.LmdbS4-.LwritesccbS4(%r8) # update mdb length
ar %r9,%r6
sth %r9,.LmdbS4-.LwritesccbS4(%r8)
lh %r9,.LevbufS4-.LwritesccbS4(%r8)# update evbuf length
ar %r9,%r6
sth %r9,.LevbufS4-.LwritesccbS4(%r8)
lh %r9,0(%r8) # update sccb length
ar %r9,%r6
sth %r9,0(%r8)
ar %r7,%r6 # update current mto adress
ltr %r0,%r0 # more characters?
jnz .LinitmtoS4
l %r2,.LwritedataS4-.LbaseS4(%r13)# write data
lr %r3,%r8
bras %r14,_sclp_servc
ltr %r2,%r2 # servc successful?
jnz .LendS4
chi %r3,0x20 # write data successful?
je .LendS4
lhi %r2,1 # error return code
.LendS4:
lm %r6,%r15,120(%r15) # restore registers
br %r14
#
# Function which prints a given text to the SCLP console.
#
# Parameters:
# R2 = address of nil-terminated ASCII text
#
# Returns:
# R2 = 0 on success, 1 on failure
#
.globl _sclp_print_early
_sclp_print_early:
stm %r6,%r15,24(%r15) # save registers
ahi %r15,-96 # create stack frame
lr %r10,%r2 # save string pointer
lhi %r2,0
bras %r14,_sclp_setup # enable console
ltr %r2,%r2
jnz .LendS5
lr %r2,%r10
bras %r14,_sclp_print # print string
ltr %r2,%r2
jnz .LendS5
lhi %r2,1
bras %r14,_sclp_setup # disable console
.LendS5:
lm %r6,%r15,120(%r15) # restore registers
br %r14
.LwritedataS4:
.long 0x00760005 # SCLP command for write data
.LwritesccbS4:
# sccb
.word .LmtoS4-.LwritesccbS4
.byte 0
.byte 0,0,0
.word 0
# evbuf
.LevbufS4:
.word .LmtoS4-.LevbufS4
.byte 0x02
.byte 0
.word 0
.LmdbS4:
# mdb
.word .LmtoS4-.LmdbS4
.word 1
.long 0xd4c4c240
.long 1
# go
.LgoS4:
.word .LmtoS4-.LgoS4
.word 1
.long 0
.byte 0,0,0,0,0,0,0,0
.byte 0,0,0
.byte 0
.byte 0,0,0,0,0,0,0
.byte 0
.word 0
.byte 0,0,0,0,0,0,0,0,0,0
.byte 0,0,0,0,0,0,0,0
.byte 0,0,0,0,0,0,0,0
.LmtoS4:
.word .LmtoendS4-.LmtoS4
.word 4
.word 0x1000
.byte 0
.byte 0,0,0
.LmtoendS4:
# Global constants
.LsccbS0:
.long _sclp_work_area
.Lascebc:
.long _ascebc
.previous
.section ".init.data","a"
.balign 4096
_sclp_work_area:
.fill 4096
.previous

2
arch/s390/kernel/setup.c
View File

@ -42,6 +42,7 @@
#include <linux/ctype.h>
#include <linux/reboot.h>
#include <linux/topology.h>
#include <linux/ftrace.h>
#include <asm/ipl.h>
#include <asm/uaccess.h>
@ -442,6 +443,7 @@ setup_lowcore(void)
lc->steal_timer = S390_lowcore.steal_timer;
lc->last_update_timer = S390_lowcore.last_update_timer;
lc->last_update_clock = S390_lowcore.last_update_clock;
lc->ftrace_func = S390_lowcore.ftrace_func;
set_prefix((u32)(unsigned long) lc);
lowcore_ptr[0] = lc;
}

3
arch/s390/kernel/signal.c
View File

@ -26,6 +26,7 @@
#include <linux/binfmts.h>
#include <linux/tracehook.h>
#include <linux/syscalls.h>
#include <linux/compat.h>
#include <asm/ucontext.h>
#include <asm/uaccess.h>
#include <asm/lowcore.h>
@ -482,7 +483,7 @@ void do_signal(struct pt_regs *regs)
/* Whee! Actually deliver the signal. */
int ret;
#ifdef CONFIG_COMPAT
if (test_thread_flag(TIF_31BIT)) {
if (is_compat_task()) {
ret = handle_signal32(signr, &ka, &info, oldset, regs);
}
else

3
arch/s390/kernel/smp.c
View File

@ -47,7 +47,7 @@
#include <asm/timer.h>
#include <asm/lowcore.h>
#include <asm/sclp.h>
#include <asm/cpu.h>
#include <asm/cputime.h>
#include <asm/vdso.h>
#include "entry.h"
@ -572,6 +572,7 @@ int __cpuinit __cpu_up(unsigned int cpu)
cpu_lowcore->cpu_nr = cpu;
cpu_lowcore->kernel_asce = S390_lowcore.kernel_asce;
cpu_lowcore->machine_flags = S390_lowcore.machine_flags;
cpu_lowcore->ftrace_func = S390_lowcore.ftrace_func;
eieio();
while (signal_processor(cpu, sigp_restart) == sigp_busy)

2
arch/s390/kernel/syscalls.S
View File

@ -338,3 +338,5 @@ SYSCALL(sys_dup3,sys_dup3,sys_dup3_wrapper)
SYSCALL(sys_epoll_create1,sys_epoll_create1,sys_epoll_create1_wrapper)
SYSCALL(sys_preadv,sys_preadv,compat_sys_preadv_wrapper)
SYSCALL(sys_pwritev,sys_pwritev,compat_sys_pwritev_wrapper)
SYSCALL(sys_rt_tgsigqueueinfo,sys_rt_tgsigqueueinfo,compat_sys_rt_tgsigqueueinfo_wrapper) /* 330 */
SYSCALL(sys_perf_counter_open,sys_perf_counter_open,sys_perf_counter_open_wrapper)

9
arch/s390/kernel/time.c
View File

@ -70,7 +70,7 @@ static DEFINE_PER_CPU(struct clock_event_device, comparators);
/*
* Scheduler clock - returns current time in nanosec units.
*/
unsigned long long sched_clock(void)
unsigned long long notrace sched_clock(void)
{
return ((get_clock_xt() - sched_clock_base_cc) * 125) >> 9;
}
@ -95,12 +95,6 @@ void tod_to_timeval(__u64 todval, struct timespec *xtime)
xtime->tv_nsec = ((todval * 1000) >> 12);
}
#ifdef CONFIG_PROFILING
#define s390_do_profile() profile_tick(CPU_PROFILING)
#else
#define s390_do_profile() do { ; } while(0)
#endif /* CONFIG_PROFILING */
void clock_comparator_work(void)
{
struct clock_event_device *cd;
@ -109,7 +103,6 @@ void clock_comparator_work(void)
set_clock_comparator(S390_lowcore.clock_comparator);
cd = &__get_cpu_var(comparators);
cd->event_handler(cd);
s390_do_profile();
}
/*

19
arch/s390/kernel/vdso.c
View File

@ -22,7 +22,7 @@
#include <linux/elf.h>
#include <linux/security.h>
#include <linux/bootmem.h>
#include <linux/compat.h>
#include <asm/pgtable.h>
#include <asm/system.h>
#include <asm/processor.h>
@ -53,8 +53,19 @@ unsigned int __read_mostly vdso_enabled = 1;
static int __init vdso_setup(char *s)
{
vdso_enabled = simple_strtoul(s, NULL, 0);
return 1;
unsigned long val;
int rc;
rc = 0;
if (strncmp(s, "on", 3) == 0)
vdso_enabled = 1;
else if (strncmp(s, "off", 4) == 0)
vdso_enabled = 0;
else {
rc = strict_strtoul(s, 0, &val);
vdso_enabled = rc ? 0 : !!val;
}
return !rc;
}
__setup("vdso=", vdso_setup);
@ -203,7 +214,7 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
vdso_pagelist = vdso64_pagelist;
vdso_pages = vdso64_pages;
#ifdef CONFIG_COMPAT
if (test_thread_flag(TIF_31BIT)) {
if (is_compat_task()) {
vdso_pagelist = vdso32_pagelist;
vdso_pages = vdso32_pages;
}

1
arch/s390/kernel/vmlinux.lds.S
View File

@ -34,6 +34,7 @@ SECTIONS
SCHED_TEXT
LOCK_TEXT
KPROBES_TEXT
IRQENTRY_TEXT
*(.fixup)
*(.gnu.warning)
} :text = 0x0700

2
arch/s390/kernel/vtime.c
View File

@ -23,7 +23,7 @@
#include <asm/s390_ext.h>
#include <asm/timer.h>
#include <asm/irq_regs.h>
#include <asm/cpu.h>
#include <asm/cputime.h>
static ext_int_info_t ext_int_info_timer;

2
arch/s390/kvm/kvm-s390.c
View File

@ -512,7 +512,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
BUG();
}
might_sleep();
might_fault();
do {
__vcpu_run(vcpu);

40
arch/s390/lib/spinlock.c
View File

@ -124,6 +124,27 @@ void _raw_read_lock_wait(raw_rwlock_t *rw)
}
EXPORT_SYMBOL(_raw_read_lock_wait);
void _raw_read_lock_wait_flags(raw_rwlock_t *rw, unsigned long flags)
{
unsigned int old;
int count = spin_retry;
local_irq_restore(flags);
while (1) {
if (count-- <= 0) {
_raw_yield();
count = spin_retry;
}
if (!__raw_read_can_lock(rw))
continue;
old = rw->lock & 0x7fffffffU;
local_irq_disable();
if (_raw_compare_and_swap(&rw->lock, old, old + 1) == old)
return;
}
}
EXPORT_SYMBOL(_raw_read_lock_wait_flags);
int _raw_read_trylock_retry(raw_rwlock_t *rw)
{
unsigned int old;
@ -157,6 +178,25 @@ void _raw_write_lock_wait(raw_rwlock_t *rw)
}
EXPORT_SYMBOL(_raw_write_lock_wait);
void _raw_write_lock_wait_flags(raw_rwlock_t *rw, unsigned long flags)
{
int count = spin_retry;
local_irq_restore(flags);
while (1) {
if (count-- <= 0) {
_raw_yield();
count = spin_retry;
}
if (!__raw_write_can_lock(rw))
continue;
local_irq_disable();
if (_raw_compare_and_swap(&rw->lock, 0, 0x80000000) == 0)
return;
}
}
EXPORT_SYMBOL(_raw_write_lock_wait_flags);
int _raw_write_trylock_retry(raw_rwlock_t *rw)
{
int count = spin_retry;

2
arch/s390/mm/Makefile
View File

@ -2,7 +2,7 @@
# Makefile for the linux s390-specific parts of the memory manager.
#
obj-y := init.o fault.o extmem.o mmap.o vmem.o pgtable.o
obj-y := init.o fault.o extmem.o mmap.o vmem.o pgtable.o maccess.o
obj-$(CONFIG_CMM) += cmm.o
obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
obj-$(CONFIG_PAGE_STATES) += page-states.o

3
arch/s390/mm/fault.c
View File

@ -19,6 +19,7 @@
#include <linux/ptrace.h>
#include <linux/mman.h>
#include <linux/mm.h>
#include <linux/compat.h>
#include <linux/smp.h>
#include <linux/kdebug.h>
#include <linux/smp_lock.h>
@ -239,7 +240,7 @@ static int signal_return(struct mm_struct *mm, struct pt_regs *regs,
up_read(&mm->mmap_sem);
clear_tsk_thread_flag(current, TIF_SINGLE_STEP);
#ifdef CONFIG_COMPAT
compat = test_tsk_thread_flag(current, TIF_31BIT);
compat = is_compat_task();
if (compat && instruction == 0x0a77)
sys32_sigreturn();
else if (compat && instruction == 0x0aad)

61
arch/s390/mm/maccess.c Normal file
View File

@ -0,0 +1,61 @@
/*
* Access kernel memory without faulting -- s390 specific implementation.
*
* Copyright IBM Corp. 2009
*
* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>,
*
*/
#include <linux/uaccess.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <asm/system.h>
/*
* This function writes to kernel memory bypassing DAT and possible
* write protection. It copies one to four bytes from src to dst
* using the stura instruction.
* Returns the number of bytes copied or -EFAULT.
*/
static long probe_kernel_write_odd(void *dst, void *src, size_t size)
{
unsigned long count, aligned;
int offset, mask;
int rc = -EFAULT;
aligned = (unsigned long) dst & ~3UL;
offset = (unsigned long) dst & 3;
count = min_t(unsigned long, 4 - offset, size);
mask = (0xf << (4 - count)) & 0xf;
mask >>= offset;
asm volatile(
" bras 1,0f\n"
" icm 0,0,0(%3)\n"
"0: l 0,0(%1)\n"
" lra %1,0(%1)\n"
"1: ex %2,0(1)\n"
"2: stura 0,%1\n"
" la %0,0\n"
"3:\n"
EX_TABLE(0b,3b) EX_TABLE(1b,3b) EX_TABLE(2b,3b)
: "+d" (rc), "+a" (aligned)
: "a" (mask), "a" (src) : "cc", "memory", "0", "1");
return rc ? rc : count;
}
long probe_kernel_write(void *dst, void *src, size_t size)
{
long copied = 0;
while (size) {
copied = probe_kernel_write_odd(dst, src, size);
if (copied < 0)
break;
dst += copied;
src += copied;
size -= copied;
}
return copied < 0 ? -EFAULT : 0;
}

11
arch/s390/mm/mmap.c
View File

@ -28,6 +28,7 @@
#include <linux/mm.h>
#include <linux/module.h>
#include <asm/pgalloc.h>
#include <asm/compat.h>
/*
* Top of mmap area (just below the process stack).
@ -55,7 +56,7 @@ static inline int mmap_is_legacy(void)
/*
* Force standard allocation for 64 bit programs.
*/
if (!test_thread_flag(TIF_31BIT))
if (!is_compat_task())
return 1;
#endif
return sysctl_legacy_va_layout ||
@ -91,7 +92,7 @@ EXPORT_SYMBOL_GPL(arch_pick_mmap_layout);
int s390_mmap_check(unsigned long addr, unsigned long len)
{
if (!test_thread_flag(TIF_31BIT) &&
if (!is_compat_task() &&
len >= TASK_SIZE && TASK_SIZE < (1UL << 53))
return crst_table_upgrade(current->mm, 1UL << 53);
return 0;
@ -108,8 +109,7 @@ s390_get_unmapped_area(struct file *filp, unsigned long addr,
area = arch_get_unmapped_area(filp, addr, len, pgoff, flags);
if (!(area & ~PAGE_MASK))
return area;
if (area == -ENOMEM &&
!test_thread_flag(TIF_31BIT) && TASK_SIZE < (1UL << 53)) {
if (area == -ENOMEM && !is_compat_task() && TASK_SIZE < (1UL << 53)) {
/* Upgrade the page table to 4 levels and retry. */
rc = crst_table_upgrade(mm, 1UL << 53);
if (rc)
@ -131,8 +131,7 @@ s390_get_unmapped_area_topdown(struct file *filp, const unsigned long addr,
area = arch_get_unmapped_area_topdown(filp, addr, len, pgoff, flags);
if (!(area & ~PAGE_MASK))
return area;
if (area == -ENOMEM &&
!test_thread_flag(TIF_31BIT) && TASK_SIZE < (1UL << 53)) {
if (area == -ENOMEM && !is_compat_task() && TASK_SIZE < (1UL << 53)) {
/* Upgrade the page table to 4 levels and retry. */
rc = crst_table_upgrade(mm, 1UL << 53);
if (rc)

16
arch/s390/mm/pgtable.c
View File

@ -1,7 +1,5 @@
/*
* arch/s390/mm/pgtable.c
*
* Copyright IBM Corp. 2007
* Copyright IBM Corp. 2007,2009
* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
*/
@ -53,6 +51,18 @@ void clear_table_pgstes(unsigned long *table)
#endif
unsigned long VMALLOC_START = VMALLOC_END - VMALLOC_SIZE;
EXPORT_SYMBOL(VMALLOC_START);
static int __init parse_vmalloc(char *arg)
{
if (!arg)
return -EINVAL;
VMALLOC_START = (VMALLOC_END - memparse(arg, &arg)) & PAGE_MASK;
return 0;
}
early_param("vmalloc", parse_vmalloc);
unsigned long *crst_table_alloc(struct mm_struct *mm, int noexec)
{
struct page *page = alloc_pages(GFP_KERNEL, ALLOC_ORDER);

34
drivers/s390/block/dasd.c
View File

@ -851,8 +851,10 @@ int dasd_start_IO(struct dasd_ccw_req *cqr)
/* Check the cqr */
rc = dasd_check_cqr(cqr);
if (rc)
if (rc) {
cqr->intrc = rc;
return rc;
}
device = (struct dasd_device *) cqr->startdev;
if (cqr->retries < 0) {
/* internal error 14 - start_IO run out of retries */
@ -915,6 +917,7 @@ int dasd_start_IO(struct dasd_ccw_req *cqr)
BUG();
break;
}
cqr->intrc = rc;
return rc;
}
@ -1454,8 +1457,12 @@ int dasd_sleep_on(struct dasd_ccw_req *cqr)
dasd_add_request_tail(cqr);
wait_event(generic_waitq, _wait_for_wakeup(cqr));
/* Request status is either done or failed. */
rc = (cqr->status == DASD_CQR_DONE) ? 0 : -EIO;
if (cqr->status == DASD_CQR_DONE)
rc = 0;
else if (cqr->intrc)
rc = cqr->intrc;
else
rc = -EIO;
return rc;
}
@ -1477,8 +1484,15 @@ int dasd_sleep_on_interruptible(struct dasd_ccw_req *cqr)
dasd_cancel_req(cqr);
/* wait (non-interruptible) for final status */
wait_event(generic_waitq, _wait_for_wakeup(cqr));
cqr->intrc = rc;
}
rc = (cqr->status == DASD_CQR_DONE) ? 0 : -EIO;
if (cqr->status == DASD_CQR_DONE)
rc = 0;
else if (cqr->intrc)
rc = cqr->intrc;
else
rc = -EIO;
return rc;
}
@ -1523,8 +1537,12 @@ int dasd_sleep_on_immediatly(struct dasd_ccw_req *cqr)
wait_event(generic_waitq, _wait_for_wakeup(cqr));
/* Request status is either done or failed. */
rc = (cqr->status == DASD_CQR_DONE) ? 0 : -EIO;
if (cqr->status == DASD_CQR_DONE)
rc = 0;
else if (cqr->intrc)
rc = cqr->intrc;
else
rc = -EIO;
return rc;
}
@ -2427,12 +2445,12 @@ static struct dasd_ccw_req *dasd_generic_build_rdc(struct dasd_device *device,
int dasd_generic_read_dev_chars(struct dasd_device *device, char *magic,
void **rdc_buffer, int rdc_buffer_size)
void *rdc_buffer, int rdc_buffer_size)
{
int ret;
struct dasd_ccw_req *cqr;
cqr = dasd_generic_build_rdc(device, *rdc_buffer, rdc_buffer_size,
cqr = dasd_generic_build_rdc(device, rdc_buffer, rdc_buffer_size,
magic);
if (IS_ERR(cqr))
return PTR_ERR(cqr);

1
drivers/s390/block/dasd_diag.c
View File

@ -202,6 +202,7 @@ dasd_start_diag(struct dasd_ccw_req * cqr)
rc = -EIO;
break;
}
cqr->intrc = rc;
return rc;
}

44
drivers/s390/block/dasd_eckd.c
View File

@ -1097,20 +1097,20 @@ dasd_eckd_check_characteristics(struct dasd_device *device)
{
struct dasd_eckd_private *private;
struct dasd_block *block;
void *rdc_data;
int is_known, rc;
private = (struct dasd_eckd_private *) device->private;
if (private == NULL) {
private = kzalloc(sizeof(struct dasd_eckd_private),
GFP_KERNEL | GFP_DMA);
if (private == NULL) {
if (!private) {
private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA);
if (!private) {
dev_warn(&device->cdev->dev,
"Allocating memory for private DASD data "
"failed\n");
return -ENOMEM;
}
device->private = (void *) private;
} else {
memset(private, 0, sizeof(*private));
}
/* Invalidate status of initial analysis. */
private->init_cqr_status = -1;
@ -1161,9 +1161,8 @@ dasd_eckd_check_characteristics(struct dasd_device *device)
goto out_err3;
/* Read Device Characteristics */
rdc_data = (void *) &(private->rdc_data);
memset(rdc_data, 0, sizeof(rdc_data));
rc = dasd_generic_read_dev_chars(device, "ECKD", &rdc_data, 64);
rc = dasd_generic_read_dev_chars(device, "ECKD", &private->rdc_data,
64);
if (rc) {
DBF_EVENT(DBF_WARNING,
"Read device characteristics failed, rc=%d for "
@ -1183,7 +1182,7 @@ dasd_eckd_check_characteristics(struct dasd_device *device)
private->rdc_data.dev_model,
private->rdc_data.cu_type,
private->rdc_data.cu_model.model,
private->real_cyl,
private->real_cyl,
private->rdc_data.trk_per_cyl,
private->rdc_data.sec_per_trk);
return 0;
@ -2336,9 +2335,10 @@ static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
{
int tpm, cmdrtd, cmdwtd;
int use_prefix;
struct dasd_eckd_private *private;
#if defined(CONFIG_64BIT)
int fcx_in_css, fcx_in_gneq, fcx_in_features;
#endif
struct dasd_eckd_private *private;
struct dasd_device *basedev;
sector_t first_rec, last_rec;
sector_t first_trk, last_trk;
@ -2361,11 +2361,15 @@ static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
last_offs = sector_div(last_trk, blk_per_trk);
cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk);
/* is transport mode supported ? */
/* is transport mode supported? */
#if defined(CONFIG_64BIT)
fcx_in_css = css_general_characteristics.fcx;
fcx_in_gneq = private->gneq->reserved2[7] & 0x04;
fcx_in_features = private->features.feature[40] & 0x80;
tpm = fcx_in_css && fcx_in_gneq && fcx_in_features;
#else
tpm = 0;
#endif
/* is read track data and write track data in command mode supported? */
cmdrtd = private->features.feature[9] & 0x20;
@ -3013,8 +3017,9 @@ static void dasd_eckd_dump_sense_ccw(struct dasd_device *device,
" I/O status report for device %s:\n",
dev_name(&device->cdev->dev));
len += sprintf(page + len, KERN_ERR PRINTK_HEADER
" in req: %p CS: 0x%02X DS: 0x%02X\n", req,
scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw));
" in req: %p CS: 0x%02X DS: 0x%02X CC: 0x%02X RC: %d\n",
req, scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw),
scsw_cc(&irb->scsw), req->intrc);
len += sprintf(page + len, KERN_ERR PRINTK_HEADER
" device %s: Failing CCW: %p\n",
dev_name(&device->cdev->dev),
@ -3115,9 +3120,10 @@ static void dasd_eckd_dump_sense_tcw(struct dasd_device *device,
" I/O status report for device %s:\n",
dev_name(&device->cdev->dev));
len += sprintf(page + len, KERN_ERR PRINTK_HEADER
" in req: %p CS: 0x%02X DS: 0x%02X "
" in req: %p CS: 0x%02X DS: 0x%02X CC: 0x%02X RC: %d "
"fcxs: 0x%02X schxs: 0x%02X\n", req,
scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw),
scsw_cc(&irb->scsw), req->intrc,
irb->scsw.tm.fcxs, irb->scsw.tm.schxs);
len += sprintf(page + len, KERN_ERR PRINTK_HEADER
" device %s: Failing TCW: %p\n",
@ -3273,8 +3279,14 @@ static struct dasd_discipline dasd_eckd_discipline = {
static int __init
dasd_eckd_init(void)
{
int ret;
ASCEBC(dasd_eckd_discipline.ebcname, 4);
return ccw_driver_register(&dasd_eckd_driver);
ret = ccw_driver_register(&dasd_eckd_driver);
if (!ret)
wait_for_device_probe();
return ret;
}
static void __exit

22
drivers/s390/block/dasd_fba.c
View File

@ -122,20 +122,20 @@ dasd_fba_check_characteristics(struct dasd_device *device)
struct dasd_block *block;
struct dasd_fba_private *private;
struct ccw_device *cdev = device->cdev;
void *rdc_data;
int rc;
private = (struct dasd_fba_private *) device->private;
if (private == NULL) {
private = kzalloc(sizeof(struct dasd_fba_private),
GFP_KERNEL | GFP_DMA);
if (private == NULL) {
if (!private) {
private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA);
if (!private) {
dev_warn(&device->cdev->dev,
"Allocating memory for private DASD "
"data failed\n");
return -ENOMEM;
}
device->private = (void *) private;
} else {
memset(private, 0, sizeof(*private));
}
block = dasd_alloc_block();
if (IS_ERR(block)) {
@ -150,8 +150,8 @@ dasd_fba_check_characteristics(struct dasd_device *device)
block->base = device;
/* Read Device Characteristics */
rdc_data = (void *) &(private->rdc_data);
rc = dasd_generic_read_dev_chars(device, "FBA ", &rdc_data, 32);
rc = dasd_generic_read_dev_chars(device, "FBA ", &private->rdc_data,
32);
if (rc) {
DBF_EVENT(DBF_WARNING, "Read device characteristics returned "
"error %d for device: %s",
@ -604,8 +604,14 @@ static struct dasd_discipline dasd_fba_discipline = {
static int __init
dasd_fba_init(void)
{
int ret;
ASCEBC(dasd_fba_discipline.ebcname, 4);
return ccw_driver_register(&dasd_fba_driver);
ret = ccw_driver_register(&dasd_fba_driver);
if (!ret)
wait_for_device_probe();
return ret;
}
static void __exit

3
drivers/s390/block/dasd_int.h
View File

@ -173,6 +173,7 @@ struct dasd_ccw_req {
void *data; /* pointer to data area */
/* these are important for recovering erroneous requests */
int intrc; /* internal error, e.g. from start_IO */
struct irb irb; /* device status in case of an error */
struct dasd_ccw_req *refers; /* ERP-chain queueing. */
void *function; /* originating ERP action */
@ -578,7 +579,7 @@ int dasd_generic_set_offline (struct ccw_device *cdev);
int dasd_generic_notify(struct ccw_device *, int);
void dasd_generic_handle_state_change(struct dasd_device *);
int dasd_generic_read_dev_chars(struct dasd_device *, char *, void **, int);
int dasd_generic_read_dev_chars(struct dasd_device *, char *, void *, int);
char *dasd_get_sense(struct irb *);
/* externals in dasd_devmap.c */

4
drivers/s390/block/dcssblk.c
View File

@ -127,7 +127,7 @@ dcssblk_assign_free_minor(struct dcssblk_dev_info *dev_info)
found = 0;
// test if minor available
list_for_each_entry(entry, &dcssblk_devices, lh)
if (minor == MINOR(disk_devt(entry->gd)))
if (minor == entry->gd->first_minor)
found++;
if (!found) break; // got unused minor
}
@ -625,7 +625,7 @@ dcssblk_add_store(struct device *dev, struct device_attribute *attr, const char
if (rc)
goto release_gd;
sprintf(dev_info->gd->disk_name, "dcssblk%d",
MINOR(disk_devt(dev_info->gd)));
dev_info->gd->first_minor);
list_add_tail(&dev_info->lh, &dcssblk_devices);
if (!try_module_get(THIS_MODULE)) {

38
drivers/s390/char/con3270.c
View File

@ -64,7 +64,7 @@ static struct con3270 *condev;
#define CON_UPDATE_ERASE 1 /* Use EWRITEA instead of WRITE. */
#define CON_UPDATE_LIST 2 /* Update lines in tty3270->update. */
#define CON_UPDATE_STATUS 4 /* Update status line. */
#define CON_UPDATE_ALL 7
#define CON_UPDATE_ALL 8 /* Recreate screen. */
static void con3270_update(struct con3270 *);
@ -73,18 +73,10 @@ static void con3270_update(struct con3270 *);
*/
static void con3270_set_timer(struct con3270 *cp, int expires)
{
if (expires == 0) {
if (timer_pending(&cp->timer))
del_timer(&cp->timer);
return;
}
if (timer_pending(&cp->timer) &&
mod_timer(&cp->timer, jiffies + expires))
return;
cp->timer.function = (void (*)(unsigned long)) con3270_update;
cp->timer.data = (unsigned long) cp;
cp->timer.expires = jiffies + expires;
add_timer(&cp->timer);
if (expires == 0)
del_timer(&cp->timer);
else
mod_timer(&cp->timer, jiffies + expires);
}
/*
@ -225,6 +217,12 @@ con3270_update(struct con3270 *cp)
spin_lock_irqsave(&cp->view.lock, flags);
updated = 0;
if (cp->update_flags & CON_UPDATE_ALL) {
con3270_rebuild_update(cp);
con3270_update_status(cp);
cp->update_flags = CON_UPDATE_ERASE | CON_UPDATE_LIST |
CON_UPDATE_STATUS;
}
if (cp->update_flags & CON_UPDATE_ERASE) {
/* Use erase write alternate to initialize display. */
raw3270_request_set_cmd(wrq, TC_EWRITEA);
@ -302,7 +300,6 @@ con3270_read_tasklet(struct raw3270_request *rrq)
deactivate = 1;
break;
case 0x6d: /* clear: start from scratch. */
con3270_rebuild_update(cp);
cp->update_flags = CON_UPDATE_ALL;
con3270_set_timer(cp, 1);
break;
@ -382,30 +379,21 @@ con3270_issue_read(struct con3270 *cp)
static int
con3270_activate(struct raw3270_view *view)
{
unsigned long flags;
struct con3270 *cp;
cp = (struct con3270 *) view;
spin_lock_irqsave(&cp->view.lock, flags);
cp->nr_up = 0;
con3270_rebuild_update(cp);
con3270_update_status(cp);
cp->update_flags = CON_UPDATE_ALL;
con3270_set_timer(cp, 1);
spin_unlock_irqrestore(&cp->view.lock, flags);
return 0;
}
static void
con3270_deactivate(struct raw3270_view *view)
{
unsigned long flags;
struct con3270 *cp;
cp = (struct con3270 *) view;
spin_lock_irqsave(&cp->view.lock, flags);
del_timer(&cp->timer);
spin_unlock_irqrestore(&cp->view.lock, flags);
}
static int
@ -504,6 +492,7 @@ con3270_write(struct console *co, const char *str, unsigned int count)
con3270_cline_end(cp);
}
/* Setup timer to output current console buffer after 1/10 second */
cp->nr_up = 0;
if (cp->view.dev && !timer_pending(&cp->timer))
con3270_set_timer(cp, HZ/10);
spin_unlock_irqrestore(&cp->view.lock,flags);
@ -624,7 +613,8 @@ con3270_init(void)
INIT_LIST_HEAD(&condev->lines);
INIT_LIST_HEAD(&condev->update);
init_timer(&condev->timer);
setup_timer(&condev->timer, (void (*)(unsigned long)) con3270_update,
(unsigned long) condev);
tasklet_init(&condev->readlet,
(void (*)(unsigned long)) con3270_read_tasklet,
(unsigned long) condev->read);

57
drivers/s390/char/tty3270.c
View File

@ -112,7 +112,7 @@ struct tty3270 {
#define TTY_UPDATE_LIST 2 /* Update lines in tty3270->update. */
#define TTY_UPDATE_INPUT 4 /* Update input line. */
#define TTY_UPDATE_STATUS 8 /* Update status line. */
#define TTY_UPDATE_ALL 15
#define TTY_UPDATE_ALL 16 /* Recreate screen. */
static void tty3270_update(struct tty3270 *);
@ -121,19 +121,10 @@ static void tty3270_update(struct tty3270 *);
*/
static void tty3270_set_timer(struct tty3270 *tp, int expires)
{
if (expires == 0) {
if (timer_pending(&tp->timer) && del_timer(&tp->timer))
raw3270_put_view(&tp->view);
return;
}
if (timer_pending(&tp->timer) &&
mod_timer(&tp->timer, jiffies + expires))
return;
raw3270_get_view(&tp->view);
tp->timer.function = (void (*)(unsigned long)) tty3270_update;
tp->timer.data = (unsigned long) tp;
tp->timer.expires = jiffies + expires;
add_timer(&tp->timer);
if (expires == 0)
del_timer(&tp->timer);
else
mod_timer(&tp->timer, jiffies + expires);
}
/*
@ -337,7 +328,6 @@ tty3270_write_callback(struct raw3270_request *rq, void *data)
tp = (struct tty3270 *) rq->view;
if (rq->rc != 0) {
/* Write wasn't successfull. Refresh all. */
tty3270_rebuild_update(tp);
tp->update_flags = TTY_UPDATE_ALL;
tty3270_set_timer(tp, 1);
}
@ -366,6 +356,12 @@ tty3270_update(struct tty3270 *tp)
spin_lock(&tp->view.lock);
updated = 0;
if (tp->update_flags & TTY_UPDATE_ALL) {
tty3270_rebuild_update(tp);
tty3270_update_status(tp);
tp->update_flags = TTY_UPDATE_ERASE | TTY_UPDATE_LIST |
TTY_UPDATE_INPUT | TTY_UPDATE_STATUS;
}
if (tp->update_flags & TTY_UPDATE_ERASE) {
/* Use erase write alternate to erase display. */
raw3270_request_set_cmd(wrq, TC_EWRITEA);
@ -425,7 +421,6 @@ tty3270_update(struct tty3270 *tp)
xchg(&tp->write, wrq);
}
spin_unlock(&tp->view.lock);
raw3270_put_view(&tp->view);
}
/*
@ -570,7 +565,6 @@ tty3270_read_tasklet(struct raw3270_request *rrq)
tty3270_set_timer(tp, 1);
} else if (tp->input->string[0] == 0x6d) {
/* Display has been cleared. Redraw. */
tty3270_rebuild_update(tp);
tp->update_flags = TTY_UPDATE_ALL;
tty3270_set_timer(tp, 1);
}
@ -641,22 +635,20 @@ static int
tty3270_activate(struct raw3270_view *view)
{
struct tty3270 *tp;
unsigned long flags;
tp = (struct tty3270 *) view;
spin_lock_irqsave(&tp->view.lock, flags);
tp->nr_up = 0;
tty3270_rebuild_update(tp);
tty3270_update_status(tp);
tp->update_flags = TTY_UPDATE_ALL;
tty3270_set_timer(tp, 1);
spin_unlock_irqrestore(&tp->view.lock, flags);
return 0;
}
static void
tty3270_deactivate(struct raw3270_view *view)
{
struct tty3270 *tp;
tp = (struct tty3270 *) view;
del_timer(&tp->timer);
}
static int
@ -743,6 +735,7 @@ tty3270_free_view(struct tty3270 *tp)
{
int pages;
del_timer_sync(&tp->timer);
kbd_free(tp->kbd);
raw3270_request_free(tp->kreset);
raw3270_request_free(tp->read);
@ -889,7 +882,8 @@ tty3270_open(struct tty_struct *tty, struct file * filp)
INIT_LIST_HEAD(&tp->update);
INIT_LIST_HEAD(&tp->rcl_lines);
tp->rcl_max = 20;
init_timer(&tp->timer);
setup_timer(&tp->timer, (void (*)(unsigned long)) tty3270_update,
(unsigned long) tp);
tasklet_init(&tp->readlet,
(void (*)(unsigned long)) tty3270_read_tasklet,
(unsigned long) tp->read);
@ -1754,14 +1748,6 @@ static const struct tty_operations tty3270_ops = {
.set_termios = tty3270_set_termios
};
static void tty3270_notifier(int index, int active)
{
if (active)
tty_register_device(tty3270_driver, index, NULL);
else
tty_unregister_device(tty3270_driver, index);
}
/*
* 3270 tty registration code called from tty_init().
* Most kernel services (incl. kmalloc) are available at this poimt.
@ -1796,12 +1782,6 @@ static int __init tty3270_init(void)
return ret;
}
tty3270_driver = driver;
ret = raw3270_register_notifier(tty3270_notifier);
if (ret) {
put_tty_driver(driver);
return ret;
}
return 0;
}
@ -1810,7 +1790,6 @@ tty3270_exit(void)
{
struct tty_driver *driver;
raw3270_unregister_notifier(tty3270_notifier);
driver = tty3270_driver;
tty3270_driver = NULL;
tty_unregister_driver(driver);

6
drivers/s390/cio/cio.c
View File

@ -12,6 +12,7 @@
#define KMSG_COMPONENT "cio"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/ftrace.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
@ -28,7 +29,7 @@
#include <asm/chpid.h>
#include <asm/airq.h>
#include <asm/isc.h>
#include <asm/cpu.h>
#include <asm/cputime.h>
#include <asm/fcx.h>
#include <asm/nmi.h>
#include <asm/crw.h>
@ -626,8 +627,7 @@ out:
* handlers).
*
*/
void
do_IRQ (struct pt_regs *regs)
void __irq_entry do_IRQ(struct pt_regs *regs)
{
struct tpi_info *tpi_info;
struct subchannel *sch;

24
drivers/s390/cio/device_ops.c
View File

@ -114,7 +114,7 @@ int ccw_device_clear(struct ccw_device *cdev, unsigned long intparm)
struct subchannel *sch;
int ret;
if (!cdev)
if (!cdev || !cdev->dev.parent)
return -ENODEV;
if (cdev->private->state == DEV_STATE_NOT_OPER)
return -ENODEV;
@ -122,8 +122,6 @@ int ccw_device_clear(struct ccw_device *cdev, unsigned long intparm)
cdev->private->state != DEV_STATE_W4SENSE)
return -EINVAL;
sch = to_subchannel(cdev->dev.parent);
if (!sch)
return -ENODEV;
ret = cio_clear(sch);
if (ret == 0)
cdev->private->intparm = intparm;
@ -161,11 +159,9 @@ int ccw_device_start_key(struct ccw_device *cdev, struct ccw1 *cpa,
struct subchannel *sch;
int ret;
if (!cdev)
if (!cdev || !cdev->dev.parent)
return -ENODEV;
sch = to_subchannel(cdev->dev.parent);
if (!sch)
return -ENODEV;
if (cdev->private->state == DEV_STATE_NOT_OPER)
return -ENODEV;
if (cdev->private->state == DEV_STATE_VERIFY ||
@ -339,7 +335,7 @@ int ccw_device_halt(struct ccw_device *cdev, unsigned long intparm)
struct subchannel *sch;
int ret;
if (!cdev)
if (!cdev || !cdev->dev.parent)
return -ENODEV;
if (cdev->private->state == DEV_STATE_NOT_OPER)
return -ENODEV;
@ -347,8 +343,6 @@ int ccw_device_halt(struct ccw_device *cdev, unsigned long intparm)
cdev->private->state != DEV_STATE_W4SENSE)
return -EINVAL;
sch = to_subchannel(cdev->dev.parent);
if (!sch)
return -ENODEV;
ret = cio_halt(sch);
if (ret == 0)
cdev->private->intparm = intparm;
@ -372,11 +366,9 @@ int ccw_device_resume(struct ccw_device *cdev)
{
struct subchannel *sch;
if (!cdev)
if (!cdev || !cdev->dev.parent)
return -ENODEV;
sch = to_subchannel(cdev->dev.parent);
if (!sch)
return -ENODEV;
if (cdev->private->state == DEV_STATE_NOT_OPER)
return -ENODEV;
if (cdev->private->state != DEV_STATE_ONLINE ||
@ -471,11 +463,11 @@ __u8 ccw_device_get_path_mask(struct ccw_device *cdev)
{
struct subchannel *sch;
sch = to_subchannel(cdev->dev.parent);
if (!sch)
if (!cdev->dev.parent)
return 0;
else
return sch->lpm;
sch = to_subchannel(cdev->dev.parent);
return sch->lpm;
}
/*

54
drivers/s390/cio/qdio_main.c
View File

@ -881,42 +881,26 @@ no_handler:
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_STOPPED);
}
static int qdio_establish_check_errors(struct ccw_device *cdev, int cstat,
int dstat)
{
struct qdio_irq *irq_ptr = cdev->private->qdio_data;
if (cstat || (dstat & ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END))) {
DBF_ERROR("EQ:ck con");
goto error;
}
if (!(dstat & DEV_STAT_DEV_END)) {
DBF_ERROR("EQ:no dev");
goto error;
}
if (dstat & ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) {
DBF_ERROR("EQ: bad io");
goto error;
}
return 0;
error:
DBF_ERROR("%4x EQ:error", irq_ptr->schid.sch_no);
DBF_ERROR("ds: %2x cs:%2x", dstat, cstat);
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
return 1;
}
static void qdio_establish_handle_irq(struct ccw_device *cdev, int cstat,
int dstat)
{
struct qdio_irq *irq_ptr = cdev->private->qdio_data;
DBF_DEV_EVENT(DBF_INFO, irq_ptr, "qest irq");
if (!qdio_establish_check_errors(cdev, cstat, dstat))
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ESTABLISHED);
if (cstat)
goto error;
if (dstat & ~(DEV_STAT_DEV_END | DEV_STAT_CHN_END))
goto error;
if (!(dstat & DEV_STAT_DEV_END))
goto error;
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ESTABLISHED);
return;
error:
DBF_ERROR("%4x EQ:error", irq_ptr->schid.sch_no);
DBF_ERROR("ds: %2x cs:%2x", dstat, cstat);
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
}
/* qdio interrupt handler */
@ -946,7 +930,6 @@ void qdio_int_handler(struct ccw_device *cdev, unsigned long intparm,
}
}
qdio_irq_check_sense(irq_ptr, irb);
cstat = irb->scsw.cmd.cstat;
dstat = irb->scsw.cmd.dstat;
@ -954,22 +937,19 @@ void qdio_int_handler(struct ccw_device *cdev, unsigned long intparm,
case QDIO_IRQ_STATE_INACTIVE:
qdio_establish_handle_irq(cdev, cstat, dstat);
break;
case QDIO_IRQ_STATE_CLEANUP:
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
break;
case QDIO_IRQ_STATE_ESTABLISHED:
case QDIO_IRQ_STATE_ACTIVE:
if (cstat & SCHN_STAT_PCI) {
qdio_int_handler_pci(irq_ptr);
return;
}
if ((cstat & ~SCHN_STAT_PCI) || dstat) {
if (cstat || dstat)
qdio_handle_activate_check(cdev, intparm, cstat,
dstat);
break;
}
break;
default:
WARN_ON(1);
}
@ -1514,7 +1494,7 @@ int do_QDIO(struct ccw_device *cdev, unsigned int callflags,
if ((bufnr > QDIO_MAX_BUFFERS_PER_Q) ||
(count > QDIO_MAX_BUFFERS_PER_Q) ||
(q_nr > QDIO_MAX_QUEUES_PER_IRQ))
(q_nr >= QDIO_MAX_QUEUES_PER_IRQ))
return -EINVAL;
if (!count)

12
drivers/s390/cio/qdio_perf.c
View File

@ -25,18 +25,6 @@ struct qdio_perf_stats perf_stats;
static struct proc_dir_entry *qdio_perf_pde;
#endif
inline void qdio_perf_stat_inc(atomic_long_t *count)
{
if (qdio_performance_stats)
atomic_long_inc(count);
}
inline void qdio_perf_stat_dec(atomic_long_t *count)
{
if (qdio_performance_stats)
atomic_long_dec(count);
}
/*
* procfs functions
*/

10
drivers/s390/cio/qdio_perf.h
View File

@ -9,7 +9,6 @@
#define QDIO_PERF_H
#include <linux/types.h>
#include <linux/device.h>
#include <asm/atomic.h>
struct qdio_perf_stats {
@ -50,10 +49,13 @@ struct qdio_perf_stats {
extern struct qdio_perf_stats perf_stats;
extern int qdio_performance_stats;
static inline void qdio_perf_stat_inc(atomic_long_t *count)
{
if (qdio_performance_stats)
atomic_long_inc(count);
}
int qdio_setup_perf_stats(void);
void qdio_remove_perf_stats(void);
extern void qdio_perf_stat_inc(atomic_long_t *count);
extern void qdio_perf_stat_dec(atomic_long_t *count);
#endif

2
mm/maccess.c
View File

@ -39,7 +39,7 @@ EXPORT_SYMBOL_GPL(probe_kernel_read);
* Safely write to address @dst from the buffer at @src. If a kernel fault
* happens, handle that and return -EFAULT.
*/
long probe_kernel_write(void *dst, void *src, size_t size)
long notrace __weak probe_kernel_write(void *dst, void *src, size_t size)
{
long ret;
mm_segment_t old_fs = get_fs();

13
scripts/recordmcount.pl
View File

@ -185,6 +185,19 @@ if ($arch eq "x86_64") {
$objcopy .= " -O elf32-i386";
$cc .= " -m32";
} elsif ($arch eq "s390" && $bits == 32) {
$mcount_regex = "^\\s*([0-9a-fA-F]+):\\s*R_390_32\\s+_mcount\$";
$alignment = 4;
$ld .= " -m elf_s390";
$cc .= " -m31";
} elsif ($arch eq "s390" && $bits == 64) {
$mcount_regex = "^\\s*([0-9a-fA-F]+):\\s*R_390_(PC|PLT)32DBL\\s+_mcount\\+0x2\$";
$alignment = 8;
$type = ".quad";
$ld .= " -m elf64_s390";
$cc .= " -m64";
} elsif ($arch eq "sh") {
$alignment = 2;