Sync with Linus - rsync://rsync.kernel.org/pub/scm/linux/kernel/git/torvalds/linux...
authorTony Luck <tony.luck@intel.com>
Wed, 18 May 2005 23:28:52 +0000 (16:28 -0700)
committerTony Luck <tony.luck@intel.com>
Wed, 18 May 2005 23:28:52 +0000 (16:28 -0700)
MAINTAINERS
arch/ia64/kernel/entry.S
arch/ia64/kernel/mca.c
arch/ia64/kernel/minstate.h
arch/ia64/kernel/perfmon.c
arch/ia64/kernel/ptrace.c
arch/ia64/kernel/smpboot.c
arch/ia64/sn/kernel/setup.c
include/asm-ia64/perfmon.h
include/asm-ia64/sn/sn_sal.h

index 5b8483334de1eb0e30b83dc825f8867294bc4e0c..97bc927d2c5539ee7a430d134f0fbf3668aba113 100644 (file)
@@ -1023,8 +1023,8 @@ W:        http://www.ia64-linux.org/
 S:     Maintained
 
 SN-IA64 (Itanium) SUB-PLATFORM
-P:     Jesse Barnes
-M:     jbarnes@sgi.com
+P:     Greg Edwards
+M:     edwardsg@sgi.com
 L:     linux-altix@sgi.com
 L:     linux-ia64@vger.kernel.org
 W:     http://www.sgi.com/altix
index 81c45d44739430f5754b89117a15333f2ffa4d1f..d99316c9be28977f4a814970d42f629c958cd54b 100644 (file)
@@ -1182,7 +1182,7 @@ ENTRY(notify_resume_user)
        ;;
 (pNonSys) mov out2=0                           // out2==0 => not a syscall
        .fframe 16
-       .spillpsp ar.unat, 16                   // (note that offset is relative to psp+0x10!)
+       .spillsp ar.unat, 16
        st8 [sp]=r9,-16                         // allocate space for ar.unat and save it
        st8 [out1]=loc1,-8                      // save ar.pfs, out1=&sigscratch
        .body
@@ -1208,7 +1208,7 @@ GLOBAL_ENTRY(sys_rt_sigsuspend)
        adds out2=8,sp                          // out2=&sigscratch->ar_pfs
        ;;
        .fframe 16
-       .spillpsp ar.unat, 16                   // (note that offset is relative to psp+0x10!)
+       .spillsp ar.unat, 16
        st8 [sp]=r9,-16                         // allocate space for ar.unat and save it
        st8 [out2]=loc1,-8                      // save ar.pfs, out2=&sigscratch
        .body
index 4d6c7b8f667bc6207dc20230c453560e276da516..2c75741dcc66004e908dd792df6418aba9d61953 100644 (file)
@@ -1390,8 +1390,7 @@ ia64_mca_init(void)
        register_percpu_irq(IA64_MCA_WAKEUP_VECTOR, &mca_wkup_irqaction);
 
 #ifdef CONFIG_ACPI
-       /* Setup the CPEI/P vector and handler */
-       cpe_vector = acpi_request_vector(ACPI_INTERRUPT_CPEI);
+       /* Setup the CPEI/P handler */
        register_percpu_irq(IA64_CPEP_VECTOR, &mca_cpep_irqaction);
 #endif
 
@@ -1436,6 +1435,7 @@ ia64_mca_late_init(void)
 
 #ifdef CONFIG_ACPI
        /* Setup the CPEI/P vector and handler */
+       cpe_vector = acpi_request_vector(ACPI_INTERRUPT_CPEI);
        init_timer(&cpe_poll_timer);
        cpe_poll_timer.function = ia64_mca_cpe_poll;
 
index 1dbc7b2497c90d4b3c0a8cef4c7afb94e7abc315..f6d8a010d99beacb04dc2d3a9cf8af2e14237a3e 100644 (file)
@@ -41,7 +41,7 @@
 (pKStk) addl r3=THIS_CPU(ia64_mca_data),r3;;                                                   \
 (pKStk) ld8 r3 = [r3];;                                                                                \
 (pKStk) addl r3=IA64_MCA_CPU_INIT_STACK_OFFSET,r3;;                                            \
-(pKStk) addl sp=IA64_STK_OFFSET-IA64_PT_REGS_SIZE,r3;                                          \
+(pKStk) addl r1=IA64_STK_OFFSET-IA64_PT_REGS_SIZE,r3;                                          \
 (pUStk)        mov ar.rsc=0;           /* set enforced lazy mode, pl 0, little-endian, loadrs=0 */     \
 (pUStk)        addl r22=IA64_RBS_OFFSET,r1;            /* compute base of register backing store */    \
        ;;                                                                                      \
@@ -50,7 +50,6 @@
 (pUStk)        mov r23=ar.bspstore;                            /* save ar.bspstore */                  \
 (pUStk)        dep r22=-1,r22,61,3;                    /* compute kernel virtual addr of RBS */        \
        ;;                                                                                      \
-(pKStk) addl r1=-IA64_PT_REGS_SIZE,r1;         /* if in kernel mode, use sp (r12) */           \
 (pUStk)        mov ar.bspstore=r22;                    /* switch to kernel RBS */                      \
        ;;                                                                                      \
 (pUStk)        mov r18=ar.bsp;                                                                         \
index 71c101601e3ef060a33d416904c57021d1501c01..ab9682f8b04474a42c08a43ce52cce34289dbcce 100644 (file)
@@ -11,7 +11,7 @@
  * Version Perfmon-2.x is a rewrite of perfmon-1.x
  * by Stephane Eranian, Hewlett Packard Co.
  *
- * Copyright (C) 1999-2003, 2005  Hewlett Packard Co
+ * Copyright (C) 1999-2005  Hewlett Packard Co
  *               Stephane Eranian <eranian@hpl.hp.com>
  *               David Mosberger-Tang <davidm@hpl.hp.com>
  *
@@ -497,6 +497,9 @@ typedef struct {
 static pfm_stats_t             pfm_stats[NR_CPUS];
 static pfm_session_t           pfm_sessions;   /* global sessions information */
 
+static spinlock_t pfm_alt_install_check;
+static pfm_intr_handler_desc_t  *pfm_alt_intr_handler;
+
 static struct proc_dir_entry   *perfmon_dir;
 static pfm_uuid_t              pfm_null_uuid = {0,};
 
@@ -606,6 +609,7 @@ DEFINE_PER_CPU(unsigned long, pfm_syst_info);
 DEFINE_PER_CPU(struct task_struct *, pmu_owner);
 DEFINE_PER_CPU(pfm_context_t  *, pmu_ctx);
 DEFINE_PER_CPU(unsigned long, pmu_activation_number);
+EXPORT_SYMBOL_GPL(per_cpu__pfm_syst_info);
 
 
 /* forward declaration */
@@ -1325,7 +1329,7 @@ pfm_reserve_session(struct task_struct *task, int is_syswide, unsigned int cpu)
 error_conflict:
        DPRINT(("system wide not possible, conflicting session [%d] on CPU%d\n",
                pfm_sessions.pfs_sys_session[cpu]->pid,
-               smp_processor_id()));
+               cpu));
 abort:
        UNLOCK_PFS(flags);
 
@@ -5555,26 +5559,32 @@ pfm_interrupt_handler(int irq, void *arg, struct pt_regs *regs)
        int ret;
 
        this_cpu = get_cpu();
-       min      = pfm_stats[this_cpu].pfm_ovfl_intr_cycles_min;
-       max      = pfm_stats[this_cpu].pfm_ovfl_intr_cycles_max;
+       if (likely(!pfm_alt_intr_handler)) {
+               min = pfm_stats[this_cpu].pfm_ovfl_intr_cycles_min;
+               max = pfm_stats[this_cpu].pfm_ovfl_intr_cycles_max;
 
-       start_cycles = ia64_get_itc();
+               start_cycles = ia64_get_itc();
 
-       ret = pfm_do_interrupt_handler(irq, arg, regs);
+               ret = pfm_do_interrupt_handler(irq, arg, regs);
 
-       total_cycles = ia64_get_itc();
+               total_cycles = ia64_get_itc();
 
-       /*
-        * don't measure spurious interrupts
-        */
-       if (likely(ret == 0)) {
-               total_cycles -= start_cycles;
+               /*
+                * don't measure spurious interrupts
+                */
+               if (likely(ret == 0)) {
+                       total_cycles -= start_cycles;
 
-               if (total_cycles < min) pfm_stats[this_cpu].pfm_ovfl_intr_cycles_min = total_cycles;
-               if (total_cycles > max) pfm_stats[this_cpu].pfm_ovfl_intr_cycles_max = total_cycles;
+                       if (total_cycles < min) pfm_stats[this_cpu].pfm_ovfl_intr_cycles_min = total_cycles;
+                       if (total_cycles > max) pfm_stats[this_cpu].pfm_ovfl_intr_cycles_max = total_cycles;
 
-               pfm_stats[this_cpu].pfm_ovfl_intr_cycles += total_cycles;
+                       pfm_stats[this_cpu].pfm_ovfl_intr_cycles += total_cycles;
+               }
+       }
+       else {
+               (*pfm_alt_intr_handler->handler)(irq, arg, regs);
        }
+
        put_cpu_no_resched();
        return IRQ_HANDLED;
 }
@@ -6425,6 +6435,141 @@ static struct irqaction perfmon_irqaction = {
        .name    = "perfmon"
 };
 
+static void
+pfm_alt_save_pmu_state(void *data)
+{
+       struct pt_regs *regs;
+
+       regs = ia64_task_regs(current);
+
+       DPRINT(("called\n"));
+
+       /*
+        * should not be necessary but
+        * let's take not risk
+        */
+       pfm_clear_psr_up();
+       pfm_clear_psr_pp();
+       ia64_psr(regs)->pp = 0;
+
+       /*
+        * This call is required
+        * May cause a spurious interrupt on some processors
+        */
+       pfm_freeze_pmu();
+
+       ia64_srlz_d();
+}
+
+void
+pfm_alt_restore_pmu_state(void *data)
+{
+       struct pt_regs *regs;
+
+       regs = ia64_task_regs(current);
+
+       DPRINT(("called\n"));
+
+       /*
+        * put PMU back in state expected
+        * by perfmon
+        */
+       pfm_clear_psr_up();
+       pfm_clear_psr_pp();
+       ia64_psr(regs)->pp = 0;
+
+       /*
+        * perfmon runs with PMU unfrozen at all times
+        */
+       pfm_unfreeze_pmu();
+
+       ia64_srlz_d();
+}
+
+int
+pfm_install_alt_pmu_interrupt(pfm_intr_handler_desc_t *hdl)
+{
+       int ret, i;
+       int reserve_cpu;
+
+       /* some sanity checks */
+       if (hdl == NULL || hdl->handler == NULL) return -EINVAL;
+
+       /* do the easy test first */
+       if (pfm_alt_intr_handler) return -EBUSY;
+
+       /* one at a time in the install or remove, just fail the others */
+       if (!spin_trylock(&pfm_alt_install_check)) {
+               return -EBUSY;
+       }
+
+       /* reserve our session */
+       for_each_online_cpu(reserve_cpu) {
+               ret = pfm_reserve_session(NULL, 1, reserve_cpu);
+               if (ret) goto cleanup_reserve;
+       }
+
+       /* save the current system wide pmu states */
+       ret = on_each_cpu(pfm_alt_save_pmu_state, NULL, 0, 1);
+       if (ret) {
+               DPRINT(("on_each_cpu() failed: %d\n", ret));
+               goto cleanup_reserve;
+       }
+
+       /* officially change to the alternate interrupt handler */
+       pfm_alt_intr_handler = hdl;
+
+       spin_unlock(&pfm_alt_install_check);
+
+       return 0;
+
+cleanup_reserve:
+       for_each_online_cpu(i) {
+               /* don't unreserve more than we reserved */
+               if (i >= reserve_cpu) break;
+
+               pfm_unreserve_session(NULL, 1, i);
+       }
+
+       spin_unlock(&pfm_alt_install_check);
+
+       return ret;
+}
+EXPORT_SYMBOL_GPL(pfm_install_alt_pmu_interrupt);
+
+int
+pfm_remove_alt_pmu_interrupt(pfm_intr_handler_desc_t *hdl)
+{
+       int i;
+       int ret;
+
+       if (hdl == NULL) return -EINVAL;
+
+       /* cannot remove someone else's handler! */
+       if (pfm_alt_intr_handler != hdl) return -EINVAL;
+
+       /* one at a time in the install or remove, just fail the others */
+       if (!spin_trylock(&pfm_alt_install_check)) {
+               return -EBUSY;
+       }
+
+       pfm_alt_intr_handler = NULL;
+
+       ret = on_each_cpu(pfm_alt_restore_pmu_state, NULL, 0, 1);
+       if (ret) {
+               DPRINT(("on_each_cpu() failed: %d\n", ret));
+       }
+
+       for_each_online_cpu(i) {
+               pfm_unreserve_session(NULL, 1, i);
+       }
+
+       spin_unlock(&pfm_alt_install_check);
+
+       return 0;
+}
+EXPORT_SYMBOL_GPL(pfm_remove_alt_pmu_interrupt);
+
 /*
  * perfmon initialization routine, called from the initcall() table
  */
index 907464ee7273221468afa4c59cc811042ed2fd11..08c8a5eb25abc307c49bbc01ac34d6ad6e8e7bdb 100644 (file)
@@ -692,16 +692,30 @@ convert_to_non_syscall (struct task_struct *child, struct pt_regs  *pt,
                        unsigned long cfm)
 {
        struct unw_frame_info info, prev_info;
-       unsigned long ip, pr;
+       unsigned long ip, sp, pr;
 
        unw_init_from_blocked_task(&info, child);
        while (1) {
                prev_info = info;
                if (unw_unwind(&info) < 0)
                        return;
-               if (unw_get_rp(&info, &ip) < 0)
+
+               unw_get_sp(&info, &sp);
+               if ((long)((unsigned long)child + IA64_STK_OFFSET - sp)
+                   < IA64_PT_REGS_SIZE) {
+                       dprintk("ptrace.%s: ran off the top of the kernel "
+                               "stack\n", __FUNCTION__);
+                       return;
+               }
+               if (unw_get_pr (&prev_info, &pr) < 0) {
+                       unw_get_rp(&prev_info, &ip);
+                       dprintk("ptrace.%s: failed to read "
+                               "predicate register (ip=0x%lx)\n",
+                               __FUNCTION__, ip);
                        return;
-               if (ip < FIXADDR_USER_END)
+               }
+               if (unw_is_intr_frame(&info)
+                   && (pr & (1UL << PRED_USER_STACK)))
                        break;
        }
 
index 0d5ee57c9865ce10128cdf89a05d0af48d8d7020..3865f088ffa26d9c7db30c932098a09db0762ba0 100644 (file)
@@ -624,7 +624,7 @@ static struct {
        __u16   thread_id;
        __u16   proc_fixed_addr;
        __u8    valid;
-}mt_info[NR_CPUS] __devinit;
+} mt_info[NR_CPUS] __devinitdata;
 
 #ifdef CONFIG_HOTPLUG_CPU
 static inline void
index 4fb44984afe61198a5f3c4c62795a6ced91eb265..e64cb8175f7a7450becd3ff9962ab348b80780d1 100644 (file)
@@ -271,6 +271,8 @@ void __init sn_setup(char **cmdline_p)
        int major = sn_sal_rev_major(), minor = sn_sal_rev_minor();
        extern void sn_cpu_init(void);
 
+       ia64_sn_plat_set_error_handling_features();
+
        /*
         * If the generic code has enabled vga console support - lets
         * get rid of it again. This is a kludge for the fact that ACPI
index ed5416c5b1ac6c63ec66aa173508178da7d3ece7..7f3333dd00e44b3ed4e8296728c509e23f4a3922 100644 (file)
@@ -177,6 +177,10 @@ typedef union {
 
 extern long perfmonctl(int fd, int cmd, void *arg, int narg);
 
+typedef struct {
+       void (*handler)(int irq, void *arg, struct pt_regs *regs);
+} pfm_intr_handler_desc_t;
+
 extern void pfm_save_regs (struct task_struct *);
 extern void pfm_load_regs (struct task_struct *);
 
@@ -187,6 +191,10 @@ extern void pfm_syst_wide_update_task(struct task_struct *, unsigned long info,
 extern void pfm_inherit(struct task_struct *task, struct pt_regs *regs);
 extern void pfm_init_percpu(void);
 extern void pfm_handle_work(void);
+extern int  pfm_install_alt_pmu_interrupt(pfm_intr_handler_desc_t *h);
+extern int  pfm_remove_alt_pmu_interrupt(pfm_intr_handler_desc_t *h);
+
+
 
 /*
  * Reset PMD register flags
index 56d74ca76b5d0b9f4fc809c4f05c6152655b1311..eb0395ad0d6a68c1a93e98d86ac045c76928ce51 100644 (file)
 #define SAL_IROUTER_INTR_XMIT  SAL_CONSOLE_INTR_XMIT
 #define SAL_IROUTER_INTR_RECV  SAL_CONSOLE_INTR_RECV
 
+/*
+ * Error Handling Features
+ */
+#define SAL_ERR_FEAT_MCA_SLV_TO_OS_INIT_SLV    0x1
+#define SAL_ERR_FEAT_LOG_SBES                  0x2
+#define SAL_ERR_FEAT_MFR_OVERRIDE              0x4
+#define SAL_ERR_FEAT_SBE_THRESHOLD             0xffff0000
 
 /*
  * SAL Error Codes
@@ -341,6 +348,25 @@ ia64_sn_plat_cpei_handler(void)
        return ret_stuff.status;
 }
 
+/*
+ * Set Error Handling Features
+ */
+static inline u64
+ia64_sn_plat_set_error_handling_features(void)
+{
+       struct ia64_sal_retval ret_stuff;
+
+       ret_stuff.status = 0;
+       ret_stuff.v0 = 0;
+       ret_stuff.v1 = 0;
+       ret_stuff.v2 = 0;
+       SAL_CALL_REENTRANT(ret_stuff, SN_SAL_SET_ERROR_HANDLING_FEATURES,
+               (SAL_ERR_FEAT_MCA_SLV_TO_OS_INIT_SLV | SAL_ERR_FEAT_LOG_SBES),
+               0, 0, 0, 0, 0, 0);
+
+       return ret_stuff.status;
+}
+
 /*
  * Checks for console input.
  */
@@ -472,7 +498,7 @@ static inline u64
 ia64_sn_pod_mode(void)
 {
        struct ia64_sal_retval isrv;
-       SAL_CALL(isrv, SN_SAL_POD_MODE, 0, 0, 0, 0, 0, 0, 0);
+       SAL_CALL_REENTRANT(isrv, SN_SAL_POD_MODE, 0, 0, 0, 0, 0, 0, 0);
        if (isrv.status)
                return 0;
        return isrv.v0;