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-rw-r--r--arch/arc/kernel/perf_event.c40
-rw-r--r--arch/arc/kernel/setup.c43
-rw-r--r--arch/arc/kernel/smp.c2
-rw-r--r--arch/arc/kernel/stacktrace.c2
-rw-r--r--arch/arc/kernel/traps.c14
-rw-r--r--arch/arc/kernel/troubleshoot.c3
6 files changed, 79 insertions, 25 deletions
diff --git a/arch/arc/kernel/perf_event.c b/arch/arc/kernel/perf_event.c
index 2ce24e74f879..8aec462d90fb 100644
--- a/arch/arc/kernel/perf_event.c
+++ b/arch/arc/kernel/perf_event.c
@@ -336,15 +336,12 @@ static int arc_pmu_add(struct perf_event *event, int flags)
struct hw_perf_event *hwc = &event->hw;
int idx = hwc->idx;
- if (__test_and_set_bit(idx, pmu_cpu->used_mask)) {
- idx = find_first_zero_bit(pmu_cpu->used_mask,
- arc_pmu->n_counters);
- if (idx == arc_pmu->n_counters)
- return -EAGAIN;
-
- __set_bit(idx, pmu_cpu->used_mask);
- hwc->idx = idx;
- }
+ idx = ffz(pmu_cpu->used_mask[0]);
+ if (idx == arc_pmu->n_counters)
+ return -EAGAIN;
+
+ __set_bit(idx, pmu_cpu->used_mask);
+ hwc->idx = idx;
write_aux_reg(ARC_REG_PCT_INDEX, idx);
@@ -377,21 +374,22 @@ static irqreturn_t arc_pmu_intr(int irq, void *dev)
struct perf_sample_data data;
struct arc_pmu_cpu *pmu_cpu = this_cpu_ptr(&arc_pmu_cpu);
struct pt_regs *regs;
- int active_ints;
+ unsigned int active_ints;
int idx;
arc_pmu_disable(&arc_pmu->pmu);
active_ints = read_aux_reg(ARC_REG_PCT_INT_ACT);
+ if (!active_ints)
+ goto done;
regs = get_irq_regs();
- for (idx = 0; idx < arc_pmu->n_counters; idx++) {
- struct perf_event *event = pmu_cpu->act_counter[idx];
+ do {
+ struct perf_event *event;
struct hw_perf_event *hwc;
- if (!(active_ints & (1 << idx)))
- continue;
+ idx = __ffs(active_ints);
/* Reset interrupt flag by writing of 1 */
write_aux_reg(ARC_REG_PCT_INT_ACT, 1 << idx);
@@ -404,19 +402,22 @@ static irqreturn_t arc_pmu_intr(int irq, void *dev)
write_aux_reg(ARC_REG_PCT_INT_CTRL,
read_aux_reg(ARC_REG_PCT_INT_CTRL) | (1 << idx));
+ event = pmu_cpu->act_counter[idx];
hwc = &event->hw;
WARN_ON_ONCE(hwc->idx != idx);
arc_perf_event_update(event, &event->hw, event->hw.idx);
perf_sample_data_init(&data, 0, hwc->last_period);
- if (!arc_pmu_event_set_period(event))
- continue;
+ if (arc_pmu_event_set_period(event)) {
+ if (perf_event_overflow(event, &data, regs))
+ arc_pmu_stop(event, 0);
+ }
- if (perf_event_overflow(event, &data, regs))
- arc_pmu_stop(event, 0);
- }
+ active_ints &= ~(1U << idx);
+ } while (active_ints);
+done:
arc_pmu_enable(&arc_pmu->pmu);
return IRQ_HANDLED;
@@ -461,6 +462,7 @@ static int arc_pmu_device_probe(struct platform_device *pdev)
pr_err("This core does not have performance counters!\n");
return -ENODEV;
}
+ BUILD_BUG_ON(ARC_PERF_MAX_COUNTERS > 32);
BUG_ON(pct_bcr.c > ARC_PERF_MAX_COUNTERS);
READ_BCR(ARC_REG_CC_BUILD, cc_bcr);
diff --git a/arch/arc/kernel/setup.c b/arch/arc/kernel/setup.c
index fb83844daeea..9d27331fe69a 100644
--- a/arch/arc/kernel/setup.c
+++ b/arch/arc/kernel/setup.c
@@ -199,8 +199,10 @@ static void read_arc_build_cfg_regs(void)
unsigned int exec_ctrl;
READ_BCR(AUX_EXEC_CTRL, exec_ctrl);
- cpu->extn.dual_iss_exist = 1;
- cpu->extn.dual_iss_enb = exec_ctrl & 1;
+ cpu->extn.dual_enb = !(exec_ctrl & 1);
+
+ /* dual issue always present for this core */
+ cpu->extn.dual = 1;
}
}
@@ -253,7 +255,7 @@ static char *arc_cpu_mumbojumbo(int cpu_id, char *buf, int len)
cpu_id, cpu->name, cpu->details,
is_isa_arcompact() ? "ARCompact" : "ARCv2",
IS_AVAIL1(cpu->isa.be, "[Big-Endian]"),
- IS_AVAIL3(cpu->extn.dual_iss_exist, cpu->extn.dual_iss_enb, " Dual-Issue"));
+ IS_AVAIL3(cpu->extn.dual, cpu->extn.dual_enb, " Dual-Issue "));
n += scnprintf(buf + n, len - n, "Timers\t\t: %s%s%s%s%s%s\nISA Extn\t: ",
IS_AVAIL1(cpu->extn.timer0, "Timer0 "),
@@ -293,11 +295,26 @@ static char *arc_cpu_mumbojumbo(int cpu_id, char *buf, int len)
if (cpu->bpu.ver)
n += scnprintf(buf + n, len - n,
- "BPU\t\t: %s%s match, cache:%d, Predict Table:%d\n",
+ "BPU\t\t: %s%s match, cache:%d, Predict Table:%d",
IS_AVAIL1(cpu->bpu.full, "full"),
IS_AVAIL1(!cpu->bpu.full, "partial"),
cpu->bpu.num_cache, cpu->bpu.num_pred);
+ if (is_isa_arcv2()) {
+ struct bcr_lpb lpb;
+
+ READ_BCR(ARC_REG_LPB_BUILD, lpb);
+ if (lpb.ver) {
+ unsigned int ctl;
+ ctl = read_aux_reg(ARC_REG_LPB_CTRL);
+
+ n += scnprintf(buf + n, len - n, " Loop Buffer:%d %s",
+ lpb.entries,
+ IS_DISABLED_RUN(!ctl));
+ }
+ }
+
+ n += scnprintf(buf + n, len - n, "\n");
return buf;
}
@@ -326,6 +343,24 @@ static char *arc_extn_mumbojumbo(int cpu_id, char *buf, int len)
cpu->dccm.base_addr, TO_KB(cpu->dccm.sz),
cpu->iccm.base_addr, TO_KB(cpu->iccm.sz));
+ if (is_isa_arcv2()) {
+
+ /* Error Protection: ECC/Parity */
+ struct bcr_erp erp;
+ READ_BCR(ARC_REG_ERP_BUILD, erp);
+
+ if (erp.ver) {
+ struct ctl_erp ctl;
+ READ_BCR(ARC_REG_ERP_CTRL, ctl);
+
+ /* inverted bits: 0 means enabled */
+ n += scnprintf(buf + n, len - n, "Extn [ECC]\t: %s%s%s%s%s%s\n",
+ IS_AVAIL3(erp.ic, !ctl.dpi, "IC "),
+ IS_AVAIL3(erp.dc, !ctl.dpd, "DC "),
+ IS_AVAIL3(erp.mmu, !ctl.mpd, "MMU "));
+ }
+ }
+
n += scnprintf(buf + n, len - n, "OS ABI [v%d]\t: %s\n",
EF_ARC_OSABI_CURRENT >> 8,
EF_ARC_OSABI_CURRENT == EF_ARC_OSABI_V3 ?
diff --git a/arch/arc/kernel/smp.c b/arch/arc/kernel/smp.c
index 6df9d94a9537..efe8b4200a67 100644
--- a/arch/arc/kernel/smp.c
+++ b/arch/arc/kernel/smp.c
@@ -250,7 +250,7 @@ static void ipi_send_msg_one(int cpu, enum ipi_msg_type msg)
* and read back old value
*/
do {
- new = old = ACCESS_ONCE(*ipi_data_ptr);
+ new = old = READ_ONCE(*ipi_data_ptr);
new |= 1U << msg;
} while (cmpxchg(ipi_data_ptr, old, new) != old);
diff --git a/arch/arc/kernel/stacktrace.c b/arch/arc/kernel/stacktrace.c
index 74315f302971..bf40e06f3fb8 100644
--- a/arch/arc/kernel/stacktrace.c
+++ b/arch/arc/kernel/stacktrace.c
@@ -163,7 +163,7 @@ arc_unwind_core(struct task_struct *tsk, struct pt_regs *regs,
*/
static int __print_sym(unsigned int address, void *unused)
{
- __print_symbol(" %s\n", address);
+ printk(" %pS\n", (void *)address);
return 0;
}
diff --git a/arch/arc/kernel/traps.c b/arch/arc/kernel/traps.c
index bcd7c9fc5d0f..133a4dae41fe 100644
--- a/arch/arc/kernel/traps.c
+++ b/arch/arc/kernel/traps.c
@@ -83,6 +83,7 @@ DO_ERROR_INFO(SIGILL, "Illegal Insn (or Seq)", insterror_is_error, ILL_ILLOPC)
DO_ERROR_INFO(SIGBUS, "Invalid Mem Access", __weak do_memory_error, BUS_ADRERR)
DO_ERROR_INFO(SIGTRAP, "Breakpoint Set", trap_is_brkpt, TRAP_BRKPT)
DO_ERROR_INFO(SIGBUS, "Misaligned Access", do_misaligned_error, BUS_ADRALN)
+DO_ERROR_INFO(SIGSEGV, "gcc generated __builtin_trap", do_trap5_error, 0)
/*
* Entry Point for Misaligned Data access Exception, for emulating in software
@@ -115,6 +116,8 @@ void do_machine_check_fault(unsigned long address, struct pt_regs *regs)
* Thus TRAP_S <n> can be used for specific purpose
* -1 used for software breakpointing (gdb)
* -2 used by kprobes
+ * -5 __builtin_trap() generated by gcc (2018.03 onwards) for toggle such as
+ * -fno-isolate-erroneous-paths-dereference
*/
void do_non_swi_trap(unsigned long address, struct pt_regs *regs)
{
@@ -134,6 +137,9 @@ void do_non_swi_trap(unsigned long address, struct pt_regs *regs)
kgdb_trap(regs);
break;
+ case 5:
+ do_trap5_error(address, regs);
+ break;
default:
break;
}
@@ -155,3 +161,11 @@ void do_insterror_or_kprobe(unsigned long address, struct pt_regs *regs)
insterror_is_error(address, regs);
}
+
+/*
+ * abort() call generated by older gcc for __builtin_trap()
+ */
+void abort(void)
+{
+ __asm__ __volatile__("trap_s 5\n");
+}
diff --git a/arch/arc/kernel/troubleshoot.c b/arch/arc/kernel/troubleshoot.c
index 7d8c1d6c2f60..6e9a0a9a6a04 100644
--- a/arch/arc/kernel/troubleshoot.c
+++ b/arch/arc/kernel/troubleshoot.c
@@ -163,6 +163,9 @@ static void show_ecr_verbose(struct pt_regs *regs)
else
pr_cont("Bus Error, check PRM\n");
#endif
+ } else if (vec == ECR_V_TRAP) {
+ if (regs->ecr_param == 5)
+ pr_cont("gcc generated __builtin_trap\n");
} else {
pr_cont("Check Programmer's Manual\n");
}
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