summaryrefslogtreecommitdiffstats
path: root/arch
diff options
context:
space:
mode:
Diffstat (limited to 'arch')
-rw-r--r--arch/ia64/kernel/entry.S4
-rw-r--r--arch/ia64/kernel/mca.c4
-rw-r--r--arch/ia64/kernel/minstate.h3
-rw-r--r--arch/ia64/kernel/perfmon.c175
-rw-r--r--arch/ia64/kernel/ptrace.c20
-rw-r--r--arch/ia64/kernel/smpboot.c2
-rw-r--r--arch/ia64/kernel/sys_ia64.c7
-rw-r--r--arch/ia64/sn/kernel/setup.c2
8 files changed, 185 insertions, 32 deletions
diff --git a/arch/ia64/kernel/entry.S b/arch/ia64/kernel/entry.S
index 81c45d44739..d99316c9be2 100644
--- a/arch/ia64/kernel/entry.S
+++ b/arch/ia64/kernel/entry.S
@@ -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
diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c
index 4d6c7b8f667..2c75741dcc6 100644
--- a/arch/ia64/kernel/mca.c
+++ b/arch/ia64/kernel/mca.c
@@ -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;
diff --git a/arch/ia64/kernel/minstate.h b/arch/ia64/kernel/minstate.h
index 1dbc7b2497c..f6d8a010d99 100644
--- a/arch/ia64/kernel/minstate.h
+++ b/arch/ia64/kernel/minstate.h
@@ -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; \
diff --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c
index 71c101601e3..6407bff6bfd 100644
--- a/arch/ia64/kernel/perfmon.c
+++ b/arch/ia64/kernel/perfmon.c
@@ -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 = SPIN_LOCK_UNLOCKED;
+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_PER_CPU_SYMBOL_GPL(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
*/
diff --git a/arch/ia64/kernel/ptrace.c b/arch/ia64/kernel/ptrace.c
index 907464ee727..08c8a5eb25a 100644
--- a/arch/ia64/kernel/ptrace.c
+++ b/arch/ia64/kernel/ptrace.c
@@ -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;
}
diff --git a/arch/ia64/kernel/smpboot.c b/arch/ia64/kernel/smpboot.c
index 0d5ee57c986..3865f088ffa 100644
--- a/arch/ia64/kernel/smpboot.c
+++ b/arch/ia64/kernel/smpboot.c
@@ -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
diff --git a/arch/ia64/kernel/sys_ia64.c b/arch/ia64/kernel/sys_ia64.c
index a8cf6d8a509..770fab37928 100644
--- a/arch/ia64/kernel/sys_ia64.c
+++ b/arch/ia64/kernel/sys_ia64.c
@@ -182,13 +182,6 @@ do_mmap2 (unsigned long addr, unsigned long len, int prot, int flags, int fd, un
}
}
- /*
- * A zero mmap always succeeds in Linux, independent of whether or not the
- * remaining arguments are valid.
- */
- if (len == 0)
- goto out;
-
/* Careful about overflows.. */
len = PAGE_ALIGN(len);
if (!len || len > TASK_SIZE) {
diff --git a/arch/ia64/sn/kernel/setup.c b/arch/ia64/sn/kernel/setup.c
index 4fb44984afe..e64cb8175f7 100644
--- a/arch/ia64/sn/kernel/setup.c
+++ b/arch/ia64/sn/kernel/setup.c
@@ -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
generated by cgit (git 2.34.1) at 2024-11-13 06:57:56 +0000