Merge branch 'master' of ssh://master.kernel.org/pub/scm/linux/kernel/git/mchehab...

[deliverable/linux.git] / arch / sparc64 / kernel / traps.c

diff --git a/arch/sparc64/kernel/traps.c b/arch/sparc64/kernel/traps.c
index 68420e2dad0eb2c28857ce854563165fe62570fc..d0fde36395b4a07e9dfa7586b8cc90d8a69bb782 100644 (file)
--- a/arch/sparc64/kernel/traps.c
+++ b/arch/sparc64/kernel/traps.c
@@ -10,15 +10,16 @@
  */
 
 #include <linux/module.h>
-#include <linux/sched.h>  /* for jiffies */
+#include <linux/sched.h>
 #include <linux/kernel.h>
 #include <linux/kallsyms.h>
 #include <linux/signal.h>
 #include <linux/smp.h>
-#include <linux/smp_lock.h>
 #include <linux/mm.h>
 #include <linux/init.h>
+#include <linux/kdebug.h>
 
+#include <asm/smp.h>
 #include <asm/delay.h>
 #include <asm/system.h>
 #include <asm/ptrace.h>
@@ -36,26 +37,12 @@
 #include <asm/psrcompat.h>
 #include <asm/processor.h>
 #include <asm/timer.h>
-#include <asm/kdebug.h>
 #include <asm/head.h>
 #ifdef CONFIG_KMOD
 #include <linux/kmod.h>
 #endif
 #include <asm/prom.h>
 
-ATOMIC_NOTIFIER_HEAD(sparc64die_chain);
-
-int register_die_notifier(struct notifier_block *nb)
-{
-       return atomic_notifier_chain_register(&sparc64die_chain, nb);
-}
-EXPORT_SYMBOL(register_die_notifier);
-
-int unregister_die_notifier(struct notifier_block *nb)
-{
-       return atomic_notifier_chain_unregister(&sparc64die_chain, nb);
-}
-EXPORT_SYMBOL(unregister_die_notifier);
 
 /* When an irrecoverable trap occurs at tl > 0, the trap entry
  * code logs the trap state registers at every level in the trap
@@ -87,6 +74,7 @@ static void dump_tl1_traplog(struct tl1_traplog *p)
                       i + 1,
                       p->trapstack[i].tstate, p->trapstack[i].tpc,
                       p->trapstack[i].tnpc, p->trapstack[i].tt);
+               print_symbol("TRAPLOG: TPC<%s>\n", p->trapstack[i].tpc);
        }
 }
 
@@ -1134,6 +1122,9 @@ static void cheetah_log_errors(struct pt_regs *regs, struct cheetah_err_info *in
        printk("%s" "ERROR(%d): TPC[%lx] TNPC[%lx] O7[%lx] TSTATE[%lx]\n",
               (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
               regs->tpc, regs->tnpc, regs->u_regs[UREG_I7], regs->tstate);
+       printk("%s" "ERROR(%d): ",
+              (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id());
+       print_symbol("TPC<%s>\n", regs->tpc);
        printk("%s" "ERROR(%d): M_SYND(%lx),  E_SYND(%lx)%s%s\n",
               (recoverable ? KERN_WARNING : KERN_CRIT), smp_processor_id(),
               (afsr & CHAFSR_M_SYNDROME) >> CHAFSR_M_SYNDROME_SHIFT,
@@ -1741,6 +1732,7 @@ void cheetah_plus_parity_error(int type, struct pt_regs *regs)
                       smp_processor_id(),
                       (type & 0x1) ? 'I' : 'D',
                       regs->tpc);
+               print_symbol(KERN_EMERG "TPC<%s>\n", regs->tpc);
                panic("Irrecoverable Cheetah+ parity error.");
        }
 
@@ -1748,6 +1740,7 @@ void cheetah_plus_parity_error(int type, struct pt_regs *regs)
               smp_processor_id(),
               (type & 0x1) ? 'I' : 'D',
               regs->tpc);
+       print_symbol(KERN_WARNING "TPC<%s>\n", regs->tpc);
 }
 
 struct sun4v_error_entry {
@@ -1867,6 +1860,16 @@ void sun4v_resum_error(struct pt_regs *regs, unsigned long offset)
 
        put_cpu();
 
+       if (ent->err_type == SUN4V_ERR_TYPE_WARNING_RES) {
+               /* If err_type is 0x4, it's a powerdown request.  Do
+                * not do the usual resumable error log because that
+                * makes it look like some abnormal error.
+                */
+               printk(KERN_INFO "Power down request...\n");
+               kill_cad_pid(SIGINT, 1);
+               return;
+       }
+
        sun4v_log_error(regs, &local_copy, cpu,
                        KERN_ERR "RESUMABLE ERROR",
                        &sun4v_resum_oflow_cnt);
@@ -1946,6 +1949,7 @@ void sun4v_itlb_error_report(struct pt_regs *regs, int tl)
 
        printk(KERN_EMERG "SUN4V-ITLB: Error at TPC[%lx], tl %d\n",
               regs->tpc, tl);
+       print_symbol(KERN_EMERG "SUN4V-ITLB: TPC<%s>\n", regs->tpc);
        printk(KERN_EMERG "SUN4V-ITLB: vaddr[%lx] ctx[%lx] "
               "pte[%lx] error[%lx]\n",
               sun4v_err_itlb_vaddr, sun4v_err_itlb_ctx,
@@ -1966,6 +1970,7 @@ void sun4v_dtlb_error_report(struct pt_regs *regs, int tl)
 
        printk(KERN_EMERG "SUN4V-DTLB: Error at TPC[%lx], tl %d\n",
               regs->tpc, tl);
+       print_symbol(KERN_EMERG "SUN4V-DTLB: TPC<%s>\n", regs->tpc);
        printk(KERN_EMERG "SUN4V-DTLB: vaddr[%lx] ctx[%lx] "
               "pte[%lx] error[%lx]\n",
               sun4v_err_dtlb_vaddr, sun4v_err_dtlb_ctx,
@@ -2253,8 +2258,12 @@ void die_if_kernel(char *str, struct pt_regs *regs)
        do_exit(SIGSEGV);
 }
 
+#define VIS_OPCODE_MASK        ((0x3 << 30) | (0x3f << 19))
+#define VIS_OPCODE_VAL ((0x2 << 30) | (0x36 << 19))
+
 extern int handle_popc(u32 insn, struct pt_regs *regs);
 extern int handle_ldf_stq(u32 insn, struct pt_regs *regs);
+extern int vis_emul(struct pt_regs *, unsigned int);
 
 void do_illegal_instruction(struct pt_regs *regs)
 {
@@ -2279,10 +2288,18 @@ void do_illegal_instruction(struct pt_regs *regs)
                        if (handle_ldf_stq(insn, regs))
                                return;
                } else if (tlb_type == hypervisor) {
-                       extern int vis_emul(struct pt_regs *, unsigned int);
+                       if ((insn & VIS_OPCODE_MASK) == VIS_OPCODE_VAL) {
+                               if (!vis_emul(regs, insn))
+                                       return;
+                       } else {
+                               struct fpustate *f = FPUSTATE;
 
-                       if (!vis_emul(regs, insn))
-                               return;
+                               /* XXX maybe verify XFSR bits like
+                                * XXX do_fpother() does?
+                                */
+                               if (do_mathemu(regs, f))
+                                       return;
+                       }
                }
        }
        info.si_signo = SIGILL;