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-rw-r--r--arch/arc/kernel/perf_event.c40
-rw-r--r--arch/arc/kernel/setup.c69
-rw-r--r--arch/arc/kernel/smp.c7
-rw-r--r--arch/arc/kernel/sys.c1
4 files changed, 89 insertions, 28 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 877cec8f5ea2..7ef7d9a8ff89 100644
--- a/arch/arc/kernel/setup.c
+++ b/arch/arc/kernel/setup.c
@@ -51,6 +51,7 @@ static const struct id_to_str arc_cpu_rel[] = {
{ 0x51, "R2.0" },
{ 0x52, "R2.1" },
{ 0x53, "R3.0" },
+ { 0x54, "R4.0" },
#endif
{ 0x00, NULL }
};
@@ -62,6 +63,7 @@ static const struct id_to_str arc_cpu_nm[] = {
#else
{ 0x40, "ARC EM" },
{ 0x50, "ARC HS38" },
+ { 0x54, "ARC HS48" },
#endif
{ 0x00, "Unknown" }
};
@@ -119,11 +121,11 @@ static void read_arc_build_cfg_regs(void)
struct bcr_generic bcr;
struct cpuinfo_arc *cpu = &cpuinfo_arc700[smp_processor_id()];
const struct id_to_str *tbl;
+ struct bcr_isa_arcv2 isa;
FIX_PTR(cpu);
READ_BCR(AUX_IDENTITY, cpu->core);
- READ_BCR(ARC_REG_ISA_CFG_BCR, cpu->isa);
for (tbl = &arc_cpu_rel[0]; tbl->id != 0; tbl++) {
if (cpu->core.family == tbl->id) {
@@ -133,7 +135,7 @@ static void read_arc_build_cfg_regs(void)
}
for (tbl = &arc_cpu_nm[0]; tbl->id != 0; tbl++) {
- if ((cpu->core.family & 0xF0) == tbl->id)
+ if ((cpu->core.family & 0xF4) == tbl->id)
break;
}
cpu->name = tbl->str;
@@ -192,6 +194,16 @@ static void read_arc_build_cfg_regs(void)
cpu->bpu.full = bpu.ft;
cpu->bpu.num_cache = 256 << bpu.bce;
cpu->bpu.num_pred = 2048 << bpu.pte;
+
+ if (cpu->core.family >= 0x54) {
+ unsigned int exec_ctrl;
+
+ READ_BCR(AUX_EXEC_CTRL, exec_ctrl);
+ cpu->extn.dual_enb = exec_ctrl & 1;
+
+ /* dual issue always present for this core */
+ cpu->extn.dual = 1;
+ }
}
READ_BCR(ARC_REG_AP_BCR, bcr);
@@ -205,18 +217,25 @@ static void read_arc_build_cfg_regs(void)
cpu->extn.debug = cpu->extn.ap | cpu->extn.smart | cpu->extn.rtt;
+ READ_BCR(ARC_REG_ISA_CFG_BCR, isa);
+
/* some hacks for lack of feature BCR info in old ARC700 cores */
if (is_isa_arcompact()) {
- if (!cpu->isa.ver) /* ISA BCR absent, use Kconfig info */
+ if (!isa.ver) /* ISA BCR absent, use Kconfig info */
cpu->isa.atomic = IS_ENABLED(CONFIG_ARC_HAS_LLSC);
- else
- cpu->isa.atomic = cpu->isa.atomic1;
+ else {
+ /* ARC700_BUILD only has 2 bits of isa info */
+ struct bcr_generic bcr = *(struct bcr_generic *)&isa;
+ cpu->isa.atomic = bcr.info & 1;
+ }
cpu->isa.be = IS_ENABLED(CONFIG_CPU_BIG_ENDIAN);
/* there's no direct way to distinguish 750 vs. 770 */
if (unlikely(cpu->core.family < 0x34 || cpu->mmu.ver < 3))
cpu->name = "ARC750";
+ } else {
+ cpu->isa = isa;
}
}
@@ -232,10 +251,11 @@ static char *arc_cpu_mumbojumbo(int cpu_id, char *buf, int len)
"\nIDENTITY\t: ARCVER [%#02x] ARCNUM [%#02x] CHIPID [%#4x]\n",
core->family, core->cpu_id, core->chip_id);
- n += scnprintf(buf + n, len - n, "processor [%d]\t: %s %s (%s ISA) %s\n",
+ n += scnprintf(buf + n, len - n, "processor [%d]\t: %s %s (%s ISA) %s%s%s\n",
cpu_id, cpu->name, cpu->details,
is_isa_arcompact() ? "ARCompact" : "ARCv2",
- IS_AVAIL1(cpu->isa.be, "[Big-Endian]"));
+ IS_AVAIL1(cpu->isa.be, "[Big-Endian]"),
+ 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 "),
@@ -275,11 +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;
}
@@ -308,6 +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 f46267153ec2..efe8b4200a67 100644
--- a/arch/arc/kernel/smp.c
+++ b/arch/arc/kernel/smp.c
@@ -23,6 +23,8 @@
#include <linux/cpumask.h>
#include <linux/reboot.h>
#include <linux/irqdomain.h>
+#include <linux/export.h>
+
#include <asm/processor.h>
#include <asm/setup.h>
#include <asm/mach_desc.h>
@@ -30,6 +32,9 @@
#ifndef CONFIG_ARC_HAS_LLSC
arch_spinlock_t smp_atomic_ops_lock = __ARCH_SPIN_LOCK_UNLOCKED;
arch_spinlock_t smp_bitops_lock = __ARCH_SPIN_LOCK_UNLOCKED;
+
+EXPORT_SYMBOL_GPL(smp_atomic_ops_lock);
+EXPORT_SYMBOL_GPL(smp_bitops_lock);
#endif
struct plat_smp_ops __weak plat_smp_ops;
@@ -245,7 +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/sys.c b/arch/arc/kernel/sys.c
index 9d6c1ca26af6..fddecc76efb7 100644
--- a/arch/arc/kernel/sys.c
+++ b/arch/arc/kernel/sys.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
#include <linux/syscalls.h>
#include <linux/signal.h>
generated by cgit (git 2.34.1) at 2024-05-02 09:50:56 +0000