Commit 812cb83a authored by Kirill Tkhai's avatar Kirill Tkhai Committed by David S. Miller
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sparc64: Implement HAVE_CONTEXT_TRACKING



Mark the places when the system are in user or are in kernel.
This is used to make full dynticks system (tickless) --
CONFIG_NO_HZ_FULL dependence.
Signed-off-by: default avatarKirill Tkhai <tkhai@yandex.ru>
CC: David Miller <davem@davemloft.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 1a36265b
......@@ -64,6 +64,7 @@ config SPARC64
select HAVE_DYNAMIC_FTRACE
select HAVE_FTRACE_MCOUNT_RECORD
select HAVE_SYSCALL_TRACEPOINTS
select HAVE_CONTEXT_TRACKING
select HAVE_DEBUG_KMEMLEAK
select RTC_DRV_CMOS
select RTC_DRV_BQ4802
......
......@@ -192,7 +192,7 @@ register struct thread_info *current_thread_info_reg asm("g6");
#define TIF_UNALIGNED 5 /* allowed to do unaligned accesses */
/* flag bit 6 is available */
#define TIF_32BIT 7 /* 32-bit binary */
/* flag bit 8 is available */
#define TIF_NOHZ 8 /* in adaptive nohz mode */
#define TIF_SECCOMP 9 /* secure computing */
#define TIF_SYSCALL_AUDIT 10 /* syscall auditing active */
#define TIF_SYSCALL_TRACEPOINT 11 /* syscall tracepoint instrumentation */
......@@ -210,6 +210,7 @@ register struct thread_info *current_thread_info_reg asm("g6");
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_UNALIGNED (1<<TIF_UNALIGNED)
#define _TIF_32BIT (1<<TIF_32BIT)
#define _TIF_NOHZ (1<<TIF_NOHZ)
#define _TIF_SECCOMP (1<<TIF_SECCOMP)
#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
#define _TIF_SYSCALL_TRACEPOINT (1<<TIF_SYSCALL_TRACEPOINT)
......
......@@ -88,7 +88,6 @@ extern asmlinkage void syscall_trace_leave(struct pt_regs *regs);
extern void bad_trap_tl1(struct pt_regs *regs, long lvl);
extern void do_fpe_common(struct pt_regs *regs);
extern void do_fpieee(struct pt_regs *regs);
extern void do_fpother(struct pt_regs *regs);
extern void do_tof(struct pt_regs *regs);
......
......@@ -159,11 +159,12 @@ int kgdb_arch_handle_exception(int e_vector, int signo, int err_code,
asmlinkage void kgdb_trap(unsigned long trap_level, struct pt_regs *regs)
{
enum ctx_state prev_state = exception_enter();
unsigned long flags;
if (user_mode(regs)) {
bad_trap(regs, trap_level);
return;
goto out;
}
flushw_all();
......@@ -171,6 +172,8 @@ asmlinkage void kgdb_trap(unsigned long trap_level, struct pt_regs *regs)
local_irq_save(flags);
kgdb_handle_exception(0x172, SIGTRAP, 0, regs);
local_irq_restore(flags);
out:
exception_exit(prev_state);
}
int kgdb_arch_init(void)
......
......@@ -8,6 +8,7 @@
#include <linux/module.h>
#include <linux/kdebug.h>
#include <linux/slab.h>
#include <linux/context_tracking.h>
#include <asm/signal.h>
#include <asm/cacheflush.h>
#include <asm/uaccess.h>
......@@ -418,12 +419,14 @@ int __kprobes kprobe_exceptions_notify(struct notifier_block *self,
asmlinkage void __kprobes kprobe_trap(unsigned long trap_level,
struct pt_regs *regs)
{
enum ctx_state prev_state = exception_enter();
BUG_ON(trap_level != 0x170 && trap_level != 0x171);
if (user_mode(regs)) {
local_irq_enable();
bad_trap(regs, trap_level);
return;
goto out;
}
/* trap_level == 0x170 --> ta 0x70
......@@ -433,6 +436,8 @@ asmlinkage void __kprobes kprobe_trap(unsigned long trap_level,
(trap_level == 0x170) ? "debug" : "debug_2",
regs, 0, trap_level, SIGTRAP) != NOTIFY_STOP)
bad_trap(regs, trap_level);
out:
exception_exit(prev_state);
}
/* Jprobes support. */
......
......@@ -31,6 +31,7 @@
#include <linux/elfcore.h>
#include <linux/sysrq.h>
#include <linux/nmi.h>
#include <linux/context_tracking.h>
#include <asm/uaccess.h>
#include <asm/page.h>
......@@ -557,6 +558,7 @@ void fault_in_user_windows(void)
barf:
set_thread_wsaved(window + 1);
user_exit();
do_exit(SIGILL);
}
......
......@@ -27,6 +27,7 @@
#include <trace/syscall.h>
#include <linux/compat.h>
#include <linux/elf.h>
#include <linux/context_tracking.h>
#include <asm/asi.h>
#include <asm/pgtable.h>
......@@ -1066,6 +1067,9 @@ asmlinkage int syscall_trace_enter(struct pt_regs *regs)
/* do the secure computing check first */
secure_computing_strict(regs->u_regs[UREG_G1]);
if (test_thread_flag(TIF_NOHZ))
user_exit();
if (test_thread_flag(TIF_SYSCALL_TRACE))
ret = tracehook_report_syscall_entry(regs);
......@@ -1086,6 +1090,9 @@ asmlinkage int syscall_trace_enter(struct pt_regs *regs)
asmlinkage void syscall_trace_leave(struct pt_regs *regs)
{
if (test_thread_flag(TIF_NOHZ))
user_exit();
audit_syscall_exit(regs);
if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
......@@ -1093,4 +1100,7 @@ asmlinkage void syscall_trace_leave(struct pt_regs *regs)
if (test_thread_flag(TIF_SYSCALL_TRACE))
tracehook_report_syscall_exit(regs, 0);
if (test_thread_flag(TIF_NOHZ))
user_enter();
}
......@@ -18,10 +18,16 @@
#define RTRAP_PSTATE_IRQOFF (PSTATE_TSO|PSTATE_PEF|PSTATE_PRIV)
#define RTRAP_PSTATE_AG_IRQOFF (PSTATE_TSO|PSTATE_PEF|PSTATE_PRIV|PSTATE_AG)
#ifdef CONFIG_CONTEXT_TRACKING
# define SCHEDULE_USER schedule_user
#else
# define SCHEDULE_USER schedule
#endif
.text
.align 32
__handle_preemption:
call schedule
call SCHEDULE_USER
wrpr %g0, RTRAP_PSTATE, %pstate
ba,pt %xcc, __handle_preemption_continue
wrpr %g0, RTRAP_PSTATE_IRQOFF, %pstate
......
......@@ -23,6 +23,7 @@
#include <linux/tty.h>
#include <linux/binfmts.h>
#include <linux/bitops.h>
#include <linux/context_tracking.h>
#include <asm/uaccess.h>
#include <asm/ptrace.h>
......@@ -43,6 +44,7 @@ asmlinkage void sparc64_set_context(struct pt_regs *regs)
{
struct ucontext __user *ucp = (struct ucontext __user *)
regs->u_regs[UREG_I0];
enum ctx_state prev_state = exception_enter();
mc_gregset_t __user *grp;
unsigned long pc, npc, tstate;
unsigned long fp, i7;
......@@ -129,16 +131,19 @@ asmlinkage void sparc64_set_context(struct pt_regs *regs)
}
if (err)
goto do_sigsegv;
out:
exception_exit(prev_state);
return;
do_sigsegv:
force_sig(SIGSEGV, current);
goto out;
}
asmlinkage void sparc64_get_context(struct pt_regs *regs)
{
struct ucontext __user *ucp = (struct ucontext __user *)
regs->u_regs[UREG_I0];
enum ctx_state prev_state = exception_enter();
mc_gregset_t __user *grp;
mcontext_t __user *mcp;
unsigned long fp, i7;
......@@ -220,10 +225,12 @@ asmlinkage void sparc64_get_context(struct pt_regs *regs)
}
if (err)
goto do_sigsegv;
out:
exception_exit(prev_state);
return;
do_sigsegv:
force_sig(SIGSEGV, current);
goto out;
}
struct rt_signal_frame {
......@@ -528,11 +535,13 @@ static void do_signal(struct pt_regs *regs, unsigned long orig_i0)
void do_notify_resume(struct pt_regs *regs, unsigned long orig_i0, unsigned long thread_info_flags)
{
user_exit();
if (thread_info_flags & _TIF_SIGPENDING)
do_signal(regs, orig_i0);
if (thread_info_flags & _TIF_NOTIFY_RESUME) {
clear_thread_flag(TIF_NOTIFY_RESUME);
tracehook_notify_resume(regs);
}
user_enter();
}
......@@ -24,6 +24,7 @@
#include <linux/personality.h>
#include <linux/random.h>
#include <linux/export.h>
#include <linux/context_tracking.h>
#include <asm/uaccess.h>
#include <asm/utrap.h>
......@@ -496,6 +497,7 @@ asmlinkage unsigned long c_sys_nis_syscall(struct pt_regs *regs)
asmlinkage void sparc_breakpoint(struct pt_regs *regs)
{
enum ctx_state prev_state = exception_enter();
siginfo_t info;
if (test_thread_flag(TIF_32BIT)) {
......@@ -514,6 +516,7 @@ asmlinkage void sparc_breakpoint(struct pt_regs *regs)
#ifdef DEBUG_SPARC_BREAKPOINT
printk ("TRAP: Returning to space: PC=%lx nPC=%lx\n", regs->tpc, regs->tnpc);
#endif
exception_exit(prev_state);
}
extern void check_pending(int signum);
......
......@@ -52,7 +52,7 @@ sys32_rt_sigreturn:
#endif
.align 32
1: ldx [%g6 + TI_FLAGS], %l5
andcc %l5, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT), %g0
andcc %l5, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT|_TIF_NOHZ), %g0
be,pt %icc, rtrap
nop
call syscall_trace_leave
......@@ -184,7 +184,7 @@ linux_sparc_syscall32:
srl %i3, 0, %o3 ! IEU0
srl %i2, 0, %o2 ! IEU0 Group
andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT), %g0
andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT|_TIF_NOHZ), %g0
bne,pn %icc, linux_syscall_trace32 ! CTI
mov %i0, %l5 ! IEU1
5: call %l7 ! CTI Group brk forced
......@@ -207,7 +207,7 @@ linux_sparc_syscall:
mov %i3, %o3 ! IEU1
mov %i4, %o4 ! IEU0 Group
andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT), %g0
andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT|_TIF_NOHZ), %g0
bne,pn %icc, linux_syscall_trace ! CTI Group
mov %i0, %l5 ! IEU0
2: call %l7 ! CTI Group brk forced
......@@ -223,7 +223,7 @@ ret_sys_call:
cmp %o0, -ERESTART_RESTARTBLOCK
bgeu,pn %xcc, 1f
andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT), %g0
andcc %l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT|_TIF_NOHZ), %g0
ldx [%sp + PTREGS_OFF + PT_V9_TNPC], %l1 ! pc = npc
2:
......
......@@ -20,6 +20,7 @@
#include <linux/ftrace.h>
#include <linux/reboot.h>
#include <linux/gfp.h>
#include <linux/context_tracking.h>
#include <asm/smp.h>
#include <asm/delay.h>
......@@ -186,11 +187,12 @@ EXPORT_SYMBOL_GPL(unregister_dimm_printer);
void spitfire_insn_access_exception(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
{
enum ctx_state prev_state = exception_enter();
siginfo_t info;
if (notify_die(DIE_TRAP, "instruction access exception", regs,
0, 0x8, SIGTRAP) == NOTIFY_STOP)
return;
goto out;
if (regs->tstate & TSTATE_PRIV) {
printk("spitfire_insn_access_exception: SFSR[%016lx] "
......@@ -207,6 +209,8 @@ void spitfire_insn_access_exception(struct pt_regs *regs, unsigned long sfsr, un
info.si_addr = (void __user *)regs->tpc;
info.si_trapno = 0;
force_sig_info(SIGSEGV, &info, current);
out:
exception_exit(prev_state);
}
void spitfire_insn_access_exception_tl1(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
......@@ -260,11 +264,12 @@ void sun4v_insn_access_exception_tl1(struct pt_regs *regs, unsigned long addr, u
void spitfire_data_access_exception(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
{
enum ctx_state prev_state = exception_enter();
siginfo_t info;
if (notify_die(DIE_TRAP, "data access exception", regs,
0, 0x30, SIGTRAP) == NOTIFY_STOP)
return;
goto out;
if (regs->tstate & TSTATE_PRIV) {
/* Test if this comes from uaccess places. */
......@@ -280,7 +285,7 @@ void spitfire_data_access_exception(struct pt_regs *regs, unsigned long sfsr, un
#endif
regs->tpc = entry->fixup;
regs->tnpc = regs->tpc + 4;
return;
goto out;
}
/* Shit... */
printk("spitfire_data_access_exception: SFSR[%016lx] "
......@@ -294,6 +299,8 @@ void spitfire_data_access_exception(struct pt_regs *regs, unsigned long sfsr, un
info.si_addr = (void __user *)sfar;
info.si_trapno = 0;
force_sig_info(SIGSEGV, &info, current);
out:
exception_exit(prev_state);
}
void spitfire_data_access_exception_tl1(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar)
......@@ -1994,6 +2001,7 @@ static void sun4v_log_error(struct pt_regs *regs, struct sun4v_error_entry *ent,
*/
void sun4v_resum_error(struct pt_regs *regs, unsigned long offset)
{
enum ctx_state prev_state = exception_enter();
struct sun4v_error_entry *ent, local_copy;
struct trap_per_cpu *tb;
unsigned long paddr;
......@@ -2022,12 +2030,14 @@ void sun4v_resum_error(struct pt_regs *regs, unsigned long offset)
pr_info("Shutdown request, %u seconds...\n",
local_copy.err_secs);
orderly_poweroff(true);
return;
goto out;
}
sun4v_log_error(regs, &local_copy, cpu,
KERN_ERR "RESUMABLE ERROR",
&sun4v_resum_oflow_cnt);
out:
exception_exit(prev_state);
}
/* If we try to printk() we'll probably make matters worse, by trying
......@@ -2152,7 +2162,7 @@ void hypervisor_tlbop_error_xcall(unsigned long err, unsigned long op)
err, op);
}
void do_fpe_common(struct pt_regs *regs)
static void do_fpe_common(struct pt_regs *regs)
{
if (regs->tstate & TSTATE_PRIV) {
regs->tpc = regs->tnpc;
......@@ -2188,23 +2198,28 @@ void do_fpe_common(struct pt_regs *regs)
void do_fpieee(struct pt_regs *regs)
{
enum ctx_state prev_state = exception_enter();
if (notify_die(DIE_TRAP, "fpu exception ieee", regs,
0, 0x24, SIGFPE) == NOTIFY_STOP)
return;
goto out;
do_fpe_common(regs);
out:
exception_exit(prev_state);
}
extern int do_mathemu(struct pt_regs *, struct fpustate *, bool);
void do_fpother(struct pt_regs *regs)
{
enum ctx_state prev_state = exception_enter();
struct fpustate *f = FPUSTATE;
int ret = 0;
if (notify_die(DIE_TRAP, "fpu exception other", regs,
0, 0x25, SIGFPE) == NOTIFY_STOP)
return;
goto out;
switch ((current_thread_info()->xfsr[0] & 0x1c000)) {
case (2 << 14): /* unfinished_FPop */
......@@ -2213,17 +2228,20 @@ void do_fpother(struct pt_regs *regs)
break;
}
if (ret)
return;
goto out;
do_fpe_common(regs);
out:
exception_exit(prev_state);
}
void do_tof(struct pt_regs *regs)
{
enum ctx_state prev_state = exception_enter();
siginfo_t info;
if (notify_die(DIE_TRAP, "tagged arithmetic overflow", regs,
0, 0x26, SIGEMT) == NOTIFY_STOP)
return;
goto out;
if (regs->tstate & TSTATE_PRIV)
die_if_kernel("Penguin overflow trap from kernel mode", regs);
......@@ -2237,15 +2255,18 @@ void do_tof(struct pt_regs *regs)
info.si_addr = (void __user *)regs->tpc;
info.si_trapno = 0;
force_sig_info(SIGEMT, &info, current);
out:
exception_exit(prev_state);
}
void do_div0(struct pt_regs *regs)
{
enum ctx_state prev_state = exception_enter();
siginfo_t info;
if (notify_die(DIE_TRAP, "integer division by zero", regs,
0, 0x28, SIGFPE) == NOTIFY_STOP)
return;
goto out;
if (regs->tstate & TSTATE_PRIV)
die_if_kernel("TL0: Kernel divide by zero.", regs);
......@@ -2259,6 +2280,8 @@ void do_div0(struct pt_regs *regs)
info.si_addr = (void __user *)regs->tpc;
info.si_trapno = 0;
force_sig_info(SIGFPE, &info, current);
out:
exception_exit(prev_state);
}
static void instruction_dump(unsigned int *pc)
......@@ -2415,6 +2438,7 @@ extern int handle_ldf_stq(u32 insn, struct pt_regs *regs);
void do_illegal_instruction(struct pt_regs *regs)
{
enum ctx_state prev_state = exception_enter();
unsigned long pc = regs->tpc;
unsigned long tstate = regs->tstate;
u32 insn;
......@@ -2422,7 +2446,7 @@ void do_illegal_instruction(struct pt_regs *regs)
if (notify_die(DIE_TRAP, "illegal instruction", regs,
0, 0x10, SIGILL) == NOTIFY_STOP)
return;
goto out;
if (tstate & TSTATE_PRIV)
die_if_kernel("Kernel illegal instruction", regs);
......@@ -2431,14 +2455,14 @@ void do_illegal_instruction(struct pt_regs *regs)
if (get_user(insn, (u32 __user *) pc) != -EFAULT) {
if ((insn & 0xc1ffc000) == 0x81700000) /* POPC */ {
if (handle_popc(insn, regs))
return;
goto out;
} else if ((insn & 0xc1580000) == 0xc1100000) /* LDQ/STQ */ {
if (handle_ldf_stq(insn, regs))
return;
goto out;
} else if (tlb_type == hypervisor) {
if ((insn & VIS_OPCODE_MASK) == VIS_OPCODE_VAL) {
if (!vis_emul(regs, insn))
return;
goto out;
} else {
struct fpustate *f = FPUSTATE;
......@@ -2448,7 +2472,7 @@ void do_illegal_instruction(struct pt_regs *regs)
* Trap in the %fsr to unimplemented_FPop.
*/
if (do_mathemu(regs, f, true))
return;
goto out;
}
}
}
......@@ -2458,21 +2482,24 @@ void do_illegal_instruction(struct pt_regs *regs)
info.si_addr = (void __user *)pc;
info.si_trapno = 0;
force_sig_info(SIGILL, &info, current);
out:
exception_exit(prev_state);
}
extern void kernel_unaligned_trap(struct pt_regs *regs, unsigned int insn);
void mem_address_unaligned(struct pt_regs *regs, unsigned long sfar, unsigned long sfsr)
{
enum ctx_state prev_state = exception_enter();
siginfo_t info;
if (notify_die(DIE_TRAP, "memory address unaligned", regs,
0, 0x34, SIGSEGV) == NOTIFY_STOP)
return;
goto out;
if (regs->tstate & TSTATE_PRIV) {
kernel_unaligned_trap(regs, *((unsigned int *)regs->tpc));
return;
goto out;
}
info.si_signo = SIGBUS;
info.si_errno = 0;
......@@ -2480,6 +2507,8 @@ void mem_address_unaligned(struct pt_regs *regs, unsigned long sfar, unsigned lo
info.si_addr = (void __user *)sfar;
info.si_trapno = 0;
force_sig_info(SIGBUS, &info, current);
out:
exception_exit(prev_state);
}
void sun4v_do_mna(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
......@@ -2504,11 +2533,12 @@ void sun4v_do_mna(struct pt_regs *regs, unsigned long addr, unsigned long type_c
void do_privop(struct pt_regs *regs)
{
enum ctx_state prev_state = exception_enter();
siginfo_t info;
if (notify_die(DIE_TRAP, "privileged operation", regs,
0, 0x11, SIGILL) == NOTIFY_STOP)
return;
goto out;
if (test_thread_flag(TIF_32BIT)) {
regs->tpc &= 0xffffffff;
......@@ -2520,6 +2550,8 @@ void do_privop(struct pt_regs *regs)
info.si_addr = (void __user *)regs->tpc;
info.si_trapno = 0;
force_sig_info(SIGILL, &info, current);
out:
exception_exit(prev_state);
}
void do_privact(struct pt_regs *regs)
......@@ -2530,99 +2562,116 @@ void do_privact(struct pt_regs *regs)
/* Trap level 1 stuff or other traps we should never see... */
void do_cee(struct pt_regs *regs)
{
exception_enter();
die_if_kernel("TL0: Cache Error Exception", regs);
}
void do_cee_tl1(struct pt_regs *regs)
{
exception_enter();
dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
die_if_kernel("TL1: Cache Error Exception", regs);
}
void do_dae_tl1(struct pt_regs *regs)
{
exception_enter();
dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
die_if_kernel("TL1: Data Access Exception", regs);
}
void do_iae_tl1(struct pt_regs *regs)
{
exception_enter();
dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
die_if_kernel("TL1: Instruction Access Exception", regs);
}
void do_div0_tl1(struct pt_regs *regs)
{
exception_enter();
dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
die_if_kernel("TL1: DIV0 Exception", regs);
}
void do_fpdis_tl1(struct pt_regs *regs)
{
exception_enter();
dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
die_if_kernel("TL1: FPU Disabled", regs);
}
void do_fpieee_tl1(struct pt_regs *regs)
{
exception_enter();
dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
die_if_kernel("TL1: FPU IEEE Exception", regs);
}
void do_fpother_tl1(struct pt_regs *regs)
{
exception_enter();
dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
die_if_kernel("TL1: FPU Other Exception", regs);
}
void do_ill_tl1(struct pt_regs *regs)
{
exception_enter();
dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
die_if_kernel("TL1: Illegal Instruction Exception", regs);
}
void do_irq_tl1(struct pt_regs *regs)
{
exception_enter();
dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
die_if_kernel("TL1: IRQ Exception", regs);
}
void do_lddfmna_tl1(struct pt_regs *regs)
{
exception_enter();