[IA64] Pass more data to the MCA/INIT notify_die hooks

The MCA/INIT handlers maintain important state in the SAL to OS (sos)
area and in the monarch_cpu flag.  Kernel debuggers (such as KDB) need
this data, and may need to adjust the monarch_cpu field so make the
data available to the notify_die hooks.  Define two more events for
calling the functions on the notify_die chain.

Signed-off-by: Keith Owens <kaos@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c
index 8963171..5e6fdbe 100644 (file)
--- a/arch/ia64/kernel/mca.c
+++ b/arch/ia64/kernel/mca.c
@@ -581,10 +581,12 @@ ia64_mca_rendez_int_handler(int rendez_irq, void *arg, struct pt_regs *regs)
 {
        unsigned long flags;
        int cpu = smp_processor_id();
+       struct ia64_mca_notify_die nd =
+               { .sos = NULL, .monarch_cpu = &monarch_cpu };
 
        /* Mask all interrupts */
        local_irq_save(flags);
-       if (notify_die(DIE_MCA_RENDZVOUS_ENTER, "MCA", regs, 0, 0, 0)
+       if (notify_die(DIE_MCA_RENDZVOUS_ENTER, "MCA", regs, (long)&nd, 0, 0)
                        == NOTIFY_STOP)
                ia64_mca_spin(__FUNCTION__);
 
@@ -594,7 +596,7 @@ ia64_mca_rendez_int_handler(int rendez_irq, void *arg, struct pt_regs *regs)
         */
        ia64_sal_mc_rendez();
 
-       if (notify_die(DIE_MCA_RENDZVOUS_PROCESS, "MCA", regs, 0, 0, 0)
+       if (notify_die(DIE_MCA_RENDZVOUS_PROCESS, "MCA", regs, (long)&nd, 0, 0)
                        == NOTIFY_STOP)
                ia64_mca_spin(__FUNCTION__);
 
@@ -602,7 +604,7 @@ ia64_mca_rendez_int_handler(int rendez_irq, void *arg, struct pt_regs *regs)
        while (monarch_cpu != -1)
               cpu_relax();     /* spin until monarch leaves */
 
-       if (notify_die(DIE_MCA_RENDZVOUS_LEAVE, "MCA", regs, 0, 0, 0)
+       if (notify_die(DIE_MCA_RENDZVOUS_LEAVE, "MCA", regs, (long)&nd, 0, 0)
                        == NOTIFY_STOP)
                ia64_mca_spin(__FUNCTION__);
 
@@ -1023,6 +1025,8 @@ ia64_mca_handler(struct pt_regs *regs, struct switch_stack *sw,
                &sos->proc_state_param;
        int recover, cpu = smp_processor_id();
        task_t *previous_current;
+       struct ia64_mca_notify_die nd =
+               { .sos = sos, .monarch_cpu = &monarch_cpu };
 
        oops_in_progress = 1;   /* FIXME: make printk NMI/MCA/INIT safe */
        console_loglevel = 15;  /* make sure printks make it to console */
@@ -1031,7 +1035,7 @@ ia64_mca_handler(struct pt_regs *regs, struct switch_stack *sw,
 
        previous_current = ia64_mca_modify_original_stack(regs, sw, sos, "MCA");
        monarch_cpu = cpu;
-       if (notify_die(DIE_MCA_MONARCH_ENTER, "MCA", regs, 0, 0, 0)
+       if (notify_die(DIE_MCA_MONARCH_ENTER, "MCA", regs, (long)&nd, 0, 0)
                        == NOTIFY_STOP)
                ia64_mca_spin(__FUNCTION__);
        ia64_wait_for_slaves(cpu);
@@ -1043,7 +1047,7 @@ ia64_mca_handler(struct pt_regs *regs, struct switch_stack *sw,
         * spinning in SAL does not work.
         */
        ia64_mca_wakeup_all();
-       if (notify_die(DIE_MCA_MONARCH_PROCESS, "MCA", regs, 0, 0, 0)
+       if (notify_die(DIE_MCA_MONARCH_PROCESS, "MCA", regs, (long)&nd, 0, 0)
                        == NOTIFY_STOP)
                ia64_mca_spin(__FUNCTION__);
 
@@ -1064,7 +1068,7 @@ ia64_mca_handler(struct pt_regs *regs, struct switch_stack *sw,
                ia64_sal_clear_state_info(SAL_INFO_TYPE_MCA);
                sos->os_status = IA64_MCA_CORRECTED;
        }
-       if (notify_die(DIE_MCA_MONARCH_LEAVE, "MCA", regs, 0, 0, recover)
+       if (notify_die(DIE_MCA_MONARCH_LEAVE, "MCA", regs, (long)&nd, 0, recover)
                        == NOTIFY_STOP)
                ia64_mca_spin(__FUNCTION__);
 
@@ -1351,10 +1355,14 @@ ia64_init_handler(struct pt_regs *regs, struct switch_stack *sw,
        static atomic_t monarchs;
        task_t *previous_current;
        int cpu = smp_processor_id();
+       struct ia64_mca_notify_die nd =
+               { .sos = sos, .monarch_cpu = &monarch_cpu };
 
        oops_in_progress = 1;   /* FIXME: make printk NMI/MCA/INIT safe */
        console_loglevel = 15;  /* make sure printks make it to console */
 
+       (void) notify_die(DIE_INIT_ENTER, "INIT", regs, (long)&nd, 0, 0);
+
        printk(KERN_INFO "Entered OS INIT handler. PSP=%lx cpu=%d monarch=%ld\n",
                sos->proc_state_param, cpu, sos->monarch);
        salinfo_log_wakeup(SAL_INFO_TYPE_INIT, NULL, 0, 0);
@@ -1390,15 +1398,15 @@ ia64_init_handler(struct pt_regs *regs, struct switch_stack *sw,
                ia64_mc_info.imi_rendez_checkin[cpu] = IA64_MCA_RENDEZ_CHECKIN_INIT;
                while (monarch_cpu == -1)
                       cpu_relax();     /* spin until monarch enters */
-               if (notify_die(DIE_INIT_SLAVE_ENTER, "INIT", regs, 0, 0, 0)
+               if (notify_die(DIE_INIT_SLAVE_ENTER, "INIT", regs, (long)&nd, 0, 0)
                                == NOTIFY_STOP)
                        ia64_mca_spin(__FUNCTION__);
-               if (notify_die(DIE_INIT_SLAVE_PROCESS, "INIT", regs, 0, 0, 0)
+               if (notify_die(DIE_INIT_SLAVE_PROCESS, "INIT", regs, (long)&nd, 0, 0)
                                == NOTIFY_STOP)
                        ia64_mca_spin(__FUNCTION__);
                while (monarch_cpu != -1)
                       cpu_relax();     /* spin until monarch leaves */
-               if (notify_die(DIE_INIT_SLAVE_LEAVE, "INIT", regs, 0, 0, 0)
+               if (notify_die(DIE_INIT_SLAVE_LEAVE, "INIT", regs, (long)&nd, 0, 0)
                                == NOTIFY_STOP)
                        ia64_mca_spin(__FUNCTION__);
                printk("Slave on cpu %d returning to normal service.\n", cpu);
@@ -1409,7 +1417,7 @@ ia64_init_handler(struct pt_regs *regs, struct switch_stack *sw,
        }
 
        monarch_cpu = cpu;
-       if (notify_die(DIE_INIT_MONARCH_ENTER, "INIT", regs, 0, 0, 0)
+       if (notify_die(DIE_INIT_MONARCH_ENTER, "INIT", regs, (long)&nd, 0, 0)
                        == NOTIFY_STOP)
                ia64_mca_spin(__FUNCTION__);
 
@@ -1426,10 +1434,10 @@ ia64_init_handler(struct pt_regs *regs, struct switch_stack *sw,
         * to default_monarch_init_process() above and just print all the
         * tasks.
         */
-       if (notify_die(DIE_INIT_MONARCH_PROCESS, "INIT", regs, 0, 0, 0)
+       if (notify_die(DIE_INIT_MONARCH_PROCESS, "INIT", regs, (long)&nd, 0, 0)
                        == NOTIFY_STOP)
                ia64_mca_spin(__FUNCTION__);
-       if (notify_die(DIE_INIT_MONARCH_LEAVE, "INIT", regs, 0, 0, 0)
+       if (notify_die(DIE_INIT_MONARCH_LEAVE, "INIT", regs, (long)&nd, 0, 0)
                        == NOTIFY_STOP)
                ia64_mca_spin(__FUNCTION__);
        printk("\nINIT dump complete.  Monarch on cpu %d returning to normal service.\n", cpu);
@@ -1631,6 +1639,7 @@ ia64_mca_init(void)
                        printk(KERN_INFO "Increasing MCA rendezvous timeout from "
                                "%ld to %ld milliseconds\n", timeout, isrv.v0);
                        timeout = isrv.v0;
+                       (void) notify_die(DIE_MCA_NEW_TIMEOUT, "MCA", NULL, timeout, 0, 0);
                        continue;
                }
                printk(KERN_ERR "Failed to register rendezvous interrupt "

diff --git a/include/asm-ia64/kdebug.h b/include/asm-ia64/kdebug.h
index 218c458..c195a9a 100644 (file)
--- a/include/asm-ia64/kdebug.h
+++ b/include/asm-ia64/kdebug.h
@@ -58,6 +58,8 @@ enum die_val {
        DIE_MCA_RENDZVOUS_ENTER,
        DIE_MCA_RENDZVOUS_PROCESS,
        DIE_MCA_RENDZVOUS_LEAVE,
+       DIE_MCA_NEW_TIMEOUT,
+       DIE_INIT_ENTER,
        DIE_INIT_MONARCH_ENTER,
        DIE_INIT_MONARCH_PROCESS,
        DIE_INIT_MONARCH_LEAVE,

diff --git a/include/asm-ia64/mca.h b/include/asm-ia64/mca.h
index bfbbb8d..9c5389b 100644 (file)
--- a/include/asm-ia64/mca.h
+++ b/include/asm-ia64/mca.h
@@ -148,6 +148,11 @@ extern int  ia64_reg_MCA_extension(int (*fn)(void *, struct ia64_sal_os_state *)
 extern void ia64_unreg_MCA_extension(void);
 extern u64 ia64_get_rnat(u64 *);
 
+struct ia64_mca_notify_die {
+       struct ia64_sal_os_state *sos;
+       int *monarch_cpu;
+};
+
 #else  /* __ASSEMBLY__ */
 
 #define IA64_MCA_CORRECTED     0x0     /* Error has been corrected by OS_MCA */