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Merge branch 'devel-stable' into for-linus

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This commit is contained in:
Russell King
2012-12-11 10:01:53 +00:00
parent 0b99cb7310 14318efb32
commit 0fa5d3996d
34 changed files with 988 additions and 730 deletions
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104
arch/arm/kernel/devtree.c
View File

@@ -19,8 +19,10 @@
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <asm/cputype.h>
#include <asm/setup.h>
#include <asm/page.h>
#include <asm/smp_plat.h>
#include <asm/mach/arch.h>
#include <asm/mach-types.h>
@@ -61,6 +63,108 @@ void __init arm_dt_memblock_reserve(void)
}
}
/*
* arm_dt_init_cpu_maps - Function retrieves cpu nodes from the device tree
* and builds the cpu logical map array containing MPIDR values related to
* logical cpus
*
* Updates the cpu possible mask with the number of parsed cpu nodes
*/
void __init arm_dt_init_cpu_maps(void)
{
/*
* Temp logical map is initialized with UINT_MAX values that are
* considered invalid logical map entries since the logical map must
* contain a list of MPIDR[23:0] values where MPIDR[31:24] must
* read as 0.
*/
struct device_node *cpu, *cpus;
u32 i, j, cpuidx = 1;
u32 mpidr = is_smp() ? read_cpuid_mpidr() & MPIDR_HWID_BITMASK : 0;
u32 tmp_map[NR_CPUS] = { [0 ... NR_CPUS-1] = UINT_MAX };
bool bootcpu_valid = false;
cpus = of_find_node_by_path("/cpus");
if (!cpus)
return;
for_each_child_of_node(cpus, cpu) {
u32 hwid;
pr_debug(" * %s...\n", cpu->full_name);
/*
* A device tree containing CPU nodes with missing "reg"
* properties is considered invalid to build the
* cpu_logical_map.
*/
if (of_property_read_u32(cpu, "reg", &hwid)) {
pr_debug(" * %s missing reg property\n",
cpu->full_name);
return;
}
/*
* 8 MSBs must be set to 0 in the DT since the reg property
* defines the MPIDR[23:0].
*/
if (hwid & ~MPIDR_HWID_BITMASK)
return;
/*
* Duplicate MPIDRs are a recipe for disaster.
* Scan all initialized entries and check for
* duplicates. If any is found just bail out.
* temp values were initialized to UINT_MAX
* to avoid matching valid MPIDR[23:0] values.
*/
for (j = 0; j < cpuidx; j++)
if (WARN(tmp_map[j] == hwid, "Duplicate /cpu reg "
"properties in the DT\n"))
return;
/*
* Build a stashed array of MPIDR values. Numbering scheme
* requires that if detected the boot CPU must be assigned
* logical id 0. Other CPUs get sequential indexes starting
* from 1. If a CPU node with a reg property matching the
* boot CPU MPIDR is detected, this is recorded so that the
* logical map built from DT is validated and can be used
* to override the map created in smp_setup_processor_id().
*/
if (hwid == mpidr) {
i = 0;
bootcpu_valid = true;
} else {
i = cpuidx++;
}
if (WARN(cpuidx > nr_cpu_ids, "DT /cpu %u nodes greater than "
"max cores %u, capping them\n",
cpuidx, nr_cpu_ids)) {
cpuidx = nr_cpu_ids;
break;
}
tmp_map[i] = hwid;
}
if (WARN(!bootcpu_valid, "DT missing boot CPU MPIDR[23:0], "
"fall back to default cpu_logical_map\n"))
return;
/*
* Since the boot CPU node contains proper data, and all nodes have
* a reg property, the DT CPU list can be considered valid and the
* logical map created in smp_setup_processor_id() can be overridden
*/
for (i = 0; i < cpuidx; i++) {
set_cpu_possible(i, true);
cpu_logical_map(i) = tmp_map[i];
pr_debug("cpu logical map 0x%x\n", cpu_logical_map(i));
}
}
/**
* setup_machine_fdt - Machine setup when an dtb was passed to the kernel
* @dt_phys: physical address of dt blob

154
arch/arm/kernel/hw_breakpoint.c
View File

@@ -52,14 +52,14 @@ static u8 debug_arch;
/* Maximum supported watchpoint length. */
static u8 max_watchpoint_len;
#define READ_WB_REG_CASE(OP2, M, VAL) \
case ((OP2 << 4) + M): \
ARM_DBG_READ(c ## M, OP2, VAL); \
#define READ_WB_REG_CASE(OP2, M, VAL) \
case ((OP2 << 4) + M): \
ARM_DBG_READ(c0, c ## M, OP2, VAL); \
break
#define WRITE_WB_REG_CASE(OP2, M, VAL) \
case ((OP2 << 4) + M): \
ARM_DBG_WRITE(c ## M, OP2, VAL);\
#define WRITE_WB_REG_CASE(OP2, M, VAL) \
case ((OP2 << 4) + M): \
ARM_DBG_WRITE(c0, c ## M, OP2, VAL); \
break
#define GEN_READ_WB_REG_CASES(OP2, VAL) \
@@ -136,12 +136,12 @@ static u8 get_debug_arch(void)
/* Do we implement the extended CPUID interface? */
if (((read_cpuid_id() >> 16) & 0xf) != 0xf) {
pr_warning("CPUID feature registers not supported. "
"Assuming v6 debug is present.\n");
pr_warn_once("CPUID feature registers not supported. "
"Assuming v6 debug is present.\n");
return ARM_DEBUG_ARCH_V6;
}
ARM_DBG_READ(c0, 0, didr);
ARM_DBG_READ(c0, c0, 0, didr);
return (didr >> 16) & 0xf;
}
@@ -169,7 +169,7 @@ static int debug_exception_updates_fsr(void)
static int get_num_wrp_resources(void)
{
u32 didr;
ARM_DBG_READ(c0, 0, didr);
ARM_DBG_READ(c0, c0, 0, didr);
return ((didr >> 28) & 0xf) + 1;
}
@@ -177,7 +177,7 @@ static int get_num_wrp_resources(void)
static int get_num_brp_resources(void)
{
u32 didr;
ARM_DBG_READ(c0, 0, didr);
ARM_DBG_READ(c0, c0, 0, didr);
return ((didr >> 24) & 0xf) + 1;
}
@@ -228,19 +228,17 @@ static int get_num_brps(void)
* be put into halting debug mode at any time by an external debugger
* but there is nothing we can do to prevent that.
*/
static int monitor_mode_enabled(void)
{
u32 dscr;
ARM_DBG_READ(c0, c1, 0, dscr);
return !!(dscr & ARM_DSCR_MDBGEN);
}
static int enable_monitor_mode(void)
{
u32 dscr;
int ret = 0;
ARM_DBG_READ(c1, 0, dscr);
/* Ensure that halting mode is disabled. */
if (WARN_ONCE(dscr & ARM_DSCR_HDBGEN,
"halting debug mode enabled. Unable to access hardware resources.\n")) {
ret = -EPERM;
goto out;
}
ARM_DBG_READ(c0, c1, 0, dscr);
/* If monitor mode is already enabled, just return. */
if (dscr & ARM_DSCR_MDBGEN)
@@ -250,24 +248,27 @@ static int enable_monitor_mode(void)
switch (get_debug_arch()) {
case ARM_DEBUG_ARCH_V6:
case ARM_DEBUG_ARCH_V6_1:
ARM_DBG_WRITE(c1, 0, (dscr | ARM_DSCR_MDBGEN));
ARM_DBG_WRITE(c0, c1, 0, (dscr | ARM_DSCR_MDBGEN));
break;
case ARM_DEBUG_ARCH_V7_ECP14:
case ARM_DEBUG_ARCH_V7_1:
ARM_DBG_WRITE(c2, 2, (dscr | ARM_DSCR_MDBGEN));
ARM_DBG_WRITE(c0, c2, 2, (dscr | ARM_DSCR_MDBGEN));
isb();
break;
default:
ret = -ENODEV;
goto out;
return -ENODEV;
}
/* Check that the write made it through. */
ARM_DBG_READ(c1, 0, dscr);
if (!(dscr & ARM_DSCR_MDBGEN))
ret = -EPERM;
ARM_DBG_READ(c0, c1, 0, dscr);
if (!(dscr & ARM_DSCR_MDBGEN)) {
pr_warn_once("Failed to enable monitor mode on CPU %d.\n",
smp_processor_id());
return -EPERM;
}
out:
return ret;
return 0;
}
int hw_breakpoint_slots(int type)
@@ -328,14 +329,9 @@ int arch_install_hw_breakpoint(struct perf_event *bp)
{
struct arch_hw_breakpoint *info = counter_arch_bp(bp);
struct perf_event **slot, **slots;
int i, max_slots, ctrl_base, val_base, ret = 0;
int i, max_slots, ctrl_base, val_base;
u32 addr, ctrl;
/* Ensure that we are in monitor mode and halting mode is disabled. */
ret = enable_monitor_mode();
if (ret)
goto out;
addr = info->address;
ctrl = encode_ctrl_reg(info->ctrl) | 0x1;
@@ -362,9 +358,9 @@ int arch_install_hw_breakpoint(struct perf_event *bp)
}
}
if (WARN_ONCE(i == max_slots, "Can't find any breakpoint slot\n")) {
ret = -EBUSY;
goto out;
if (i == max_slots) {
pr_warning("Can't find any breakpoint slot\n");
return -EBUSY;
}
/* Override the breakpoint data with the step data. */
@@ -383,9 +379,7 @@ int arch_install_hw_breakpoint(struct perf_event *bp)
/* Setup the control register. */
write_wb_reg(ctrl_base + i, ctrl);
out:
return ret;
return 0;
}
void arch_uninstall_hw_breakpoint(struct perf_event *bp)
@@ -416,8 +410,10 @@ void arch_uninstall_hw_breakpoint(struct perf_event *bp)
}
}
if (WARN_ONCE(i == max_slots, "Can't find any breakpoint slot\n"))
if (i == max_slots) {
pr_warning("Can't find any breakpoint slot\n");
return;
}
/* Ensure that we disable the mismatch breakpoint. */
if (info->ctrl.type != ARM_BREAKPOINT_EXECUTE &&
@@ -596,6 +592,10 @@ int arch_validate_hwbkpt_settings(struct perf_event *bp)
int ret = 0;
u32 offset, alignment_mask = 0x3;
/* Ensure that we are in monitor debug mode. */
if (!monitor_mode_enabled())
return -ENODEV;
/* Build the arch_hw_breakpoint. */
ret = arch_build_bp_info(bp);
if (ret)
@@ -858,7 +858,7 @@ static int hw_breakpoint_pending(unsigned long addr, unsigned int fsr,
local_irq_enable();
/* We only handle watchpoints and hardware breakpoints. */
ARM_DBG_READ(c1, 0, dscr);
ARM_DBG_READ(c0, c1, 0, dscr);
/* Perform perf callbacks. */
switch (ARM_DSCR_MOE(dscr)) {
@@ -906,7 +906,7 @@ static struct undef_hook debug_reg_hook = {
static void reset_ctrl_regs(void *unused)
{
int i, raw_num_brps, err = 0, cpu = smp_processor_id();
u32 dbg_power;
u32 val;
/*
* v7 debug contains save and restore registers so that debug state
@@ -919,23 +919,30 @@ static void reset_ctrl_regs(void *unused)
switch (debug_arch) {
case ARM_DEBUG_ARCH_V6:
case ARM_DEBUG_ARCH_V6_1:
/* ARMv6 cores just need to reset the registers. */
goto reset_regs;
/* ARMv6 cores clear the registers out of reset. */
goto out_mdbgen;
case ARM_DEBUG_ARCH_V7_ECP14:
/*
* Ensure sticky power-down is clear (i.e. debug logic is
* powered up).
*/
asm volatile("mrc p14, 0, %0, c1, c5, 4" : "=r" (dbg_power));
if ((dbg_power & 0x1) == 0)
ARM_DBG_READ(c1, c5, 4, val);
if ((val & 0x1) == 0)
err = -EPERM;
/*
* Check whether we implement OS save and restore.
*/
ARM_DBG_READ(c1, c1, 4, val);
if ((val & 0x9) == 0)
goto clear_vcr;
break;
case ARM_DEBUG_ARCH_V7_1:
/*
* Ensure the OS double lock is clear.
*/
asm volatile("mrc p14, 0, %0, c1, c3, 4" : "=r" (dbg_power));
if ((dbg_power & 0x1) == 1)
ARM_DBG_READ(c1, c3, 4, val);
if ((val & 0x1) == 1)
err = -EPERM;
break;
}
@@ -947,24 +954,29 @@ static void reset_ctrl_regs(void *unused)
}
/*
* Unconditionally clear the lock by writing a value
* Unconditionally clear the OS lock by writing a value
* other than 0xC5ACCE55 to the access register.
*/
asm volatile("mcr p14, 0, %0, c1, c0, 4" : : "r" (0));
ARM_DBG_WRITE(c1, c0, 4, 0);
isb();
/*
* Clear any configured vector-catch events before
* enabling monitor mode.
*/
asm volatile("mcr p14, 0, %0, c0, c7, 0" : : "r" (0));
clear_vcr:
ARM_DBG_WRITE(c0, c7, 0, 0);
isb();
reset_regs:
if (enable_monitor_mode())
if (cpumask_intersects(&debug_err_mask, cpumask_of(cpu))) {
pr_warning("CPU %d failed to disable vector catch\n", cpu);
return;
}
/* We must also reset any reserved registers. */
/*
* The control/value register pairs are UNKNOWN out of reset so
* clear them to avoid spurious debug events.
*/
raw_num_brps = get_num_brp_resources();
for (i = 0; i < raw_num_brps; ++i) {
write_wb_reg(ARM_BASE_BCR + i, 0UL);
@@ -975,6 +987,19 @@ reset_regs:
write_wb_reg(ARM_BASE_WCR + i, 0UL);
write_wb_reg(ARM_BASE_WVR + i, 0UL);
}
if (cpumask_intersects(&debug_err_mask, cpumask_of(cpu))) {
pr_warning("CPU %d failed to clear debug register pairs\n", cpu);
return;
}
/*
* Have a crack at enabling monitor mode. We don't actually need
* it yet, but reporting an error early is useful if it fails.
*/
out_mdbgen:
if (enable_monitor_mode())
cpumask_or(&debug_err_mask, &debug_err_mask, cpumask_of(cpu));
}
static int __cpuinit dbg_reset_notify(struct notifier_block *self,
@@ -992,8 +1017,6 @@ static struct notifier_block __cpuinitdata dbg_reset_nb = {
static int __init arch_hw_breakpoint_init(void)
{
u32 dscr;
debug_arch = get_debug_arch();
if (!debug_arch_supported()) {
@@ -1028,17 +1051,10 @@ static int __init arch_hw_breakpoint_init(void)
core_num_brps, core_has_mismatch_brps() ? "(+1 reserved) " :
"", core_num_wrps);
ARM_DBG_READ(c1, 0, dscr);
if (dscr & ARM_DSCR_HDBGEN) {
max_watchpoint_len = 4;
pr_warning("halting debug mode enabled. Assuming maximum watchpoint size of %u bytes.\n",
max_watchpoint_len);
} else {
/* Work out the maximum supported watchpoint length. */
max_watchpoint_len = get_max_wp_len();
pr_info("maximum watchpoint size is %u bytes.\n",
max_watchpoint_len);
}
/* Work out the maximum supported watchpoint length. */
max_watchpoint_len = get_max_wp_len();
pr_info("maximum watchpoint size is %u bytes.\n",
max_watchpoint_len);
/* Register debug fault handler. */
hook_fault_code(FAULT_CODE_DEBUG, hw_breakpoint_pending, SIGTRAP,

85
arch/arm/kernel/perf_event.c
View File

@@ -86,12 +86,10 @@ armpmu_map_event(struct perf_event *event,
return -ENOENT;
}
int
armpmu_event_set_period(struct perf_event *event,
struct hw_perf_event *hwc,
int idx)
int armpmu_event_set_period(struct perf_event *event)
{
struct arm_pmu *armpmu = to_arm_pmu(event->pmu);
struct hw_perf_event *hwc = &event->hw;
s64 left = local64_read(&hwc->period_left);
s64 period = hwc->sample_period;
int ret = 0;
@@ -119,24 +117,22 @@ armpmu_event_set_period(struct perf_event *event,
local64_set(&hwc->prev_count, (u64)-left);
armpmu->write_counter(idx, (u64)(-left) & 0xffffffff);
armpmu->write_counter(event, (u64)(-left) & 0xffffffff);
perf_event_update_userpage(event);
return ret;
}
u64
armpmu_event_update(struct perf_event *event,
struct hw_perf_event *hwc,
int idx)
u64 armpmu_event_update(struct perf_event *event)
{
struct arm_pmu *armpmu = to_arm_pmu(event->pmu);
struct hw_perf_event *hwc = &event->hw;
u64 delta, prev_raw_count, new_raw_count;
again:
prev_raw_count = local64_read(&hwc->prev_count);
new_raw_count = armpmu->read_counter(idx);
new_raw_count = armpmu->read_counter(event);
if (local64_cmpxchg(&hwc->prev_count, prev_raw_count,
new_raw_count) != prev_raw_count)
@@ -159,7 +155,7 @@ armpmu_read(struct perf_event *event)
if (hwc->idx < 0)
return;
armpmu_event_update(event, hwc, hwc->idx);
armpmu_event_update(event);
}
static void
@@ -173,14 +169,13 @@ armpmu_stop(struct perf_event *event, int flags)
* PERF_EF_UPDATE, see comments in armpmu_start().
*/
if (!(hwc->state & PERF_HES_STOPPED)) {
armpmu->disable(hwc, hwc->idx);
armpmu_event_update(event, hwc, hwc->idx);
armpmu->disable(event);
armpmu_event_update(event);
hwc->state |= PERF_HES_STOPPED | PERF_HES_UPTODATE;
}
}
static void
armpmu_start(struct perf_event *event, int flags)
static void armpmu_start(struct perf_event *event, int flags)
{
struct arm_pmu *armpmu = to_arm_pmu(event->pmu);
struct hw_perf_event *hwc = &event->hw;
@@ -200,8 +195,8 @@ armpmu_start(struct perf_event *event, int flags)
* get an interrupt too soon or *way* too late if the overflow has
* happened since disabling.
*/
armpmu_event_set_period(event, hwc, hwc->idx);
armpmu->enable(hwc, hwc->idx);
armpmu_event_set_period(event);
armpmu->enable(event);
}
static void
@@ -233,7 +228,7 @@ armpmu_add(struct perf_event *event, int flags)
perf_pmu_disable(event->pmu);
/* If we don't have a space for the counter then finish early. */
idx = armpmu->get_event_idx(hw_events, hwc);
idx = armpmu->get_event_idx(hw_events, event);
if (idx < 0) {
err = idx;
goto out;
@@ -244,7 +239,7 @@ armpmu_add(struct perf_event *event, int flags)
* sure it is disabled.
*/
event->hw.idx = idx;
armpmu->disable(hwc, idx);
armpmu->disable(event);
hw_events->events[idx] = event;
hwc->state = PERF_HES_STOPPED | PERF_HES_UPTODATE;
@@ -264,13 +259,12 @@ validate_event(struct pmu_hw_events *hw_events,
struct perf_event *event)
{
struct arm_pmu *armpmu = to_arm_pmu(event->pmu);
struct hw_perf_event fake_event = event->hw;
struct pmu *leader_pmu = event->group_leader->pmu;
if (event->pmu != leader_pmu || event->state <= PERF_EVENT_STATE_OFF)
return 1;
return armpmu->get_event_idx(hw_events, &fake_event) >= 0;
return armpmu->get_event_idx(hw_events, event) >= 0;
}
static int
@@ -316,7 +310,7 @@ static irqreturn_t armpmu_dispatch_irq(int irq, void *dev)
static void
armpmu_release_hardware(struct arm_pmu *armpmu)
{
armpmu->free_irq();
armpmu->free_irq(armpmu);
pm_runtime_put_sync(&armpmu->plat_device->dev);
}
@@ -330,7 +324,7 @@ armpmu_reserve_hardware(struct arm_pmu *armpmu)
return -ENODEV;
pm_runtime_get_sync(&pmu_device->dev);
err = armpmu->request_irq(armpmu_dispatch_irq);
err = armpmu->request_irq(armpmu, armpmu_dispatch_irq);
if (err) {
armpmu_release_hardware(armpmu);
return err;
@@ -465,13 +459,13 @@ static void armpmu_enable(struct pmu *pmu)
int enabled = bitmap_weight(hw_events->used_mask, armpmu->num_events);
if (enabled)
armpmu->start();
armpmu->start(armpmu);
}
static void armpmu_disable(struct pmu *pmu)
{
struct arm_pmu *armpmu = to_arm_pmu(pmu);
armpmu->stop();
armpmu->stop(armpmu);
}
#ifdef CONFIG_PM_RUNTIME
@@ -517,12 +511,13 @@ static void __init armpmu_init(struct arm_pmu *armpmu)
};
}
int armpmu_register(struct arm_pmu *armpmu, char *name, int type)
int armpmu_register(struct arm_pmu *armpmu, int type)
{
armpmu_init(armpmu);
pm_runtime_enable(&armpmu->plat_device->dev);
pr_info("enabled with %s PMU driver, %d counters available\n",
armpmu->name, armpmu->num_events);
return perf_pmu_register(&armpmu->pmu, name, type);
return perf_pmu_register(&armpmu->pmu, armpmu->name, type);
}
/*
@@ -576,6 +571,10 @@ perf_callchain_user(struct perf_callchain_entry *entry, struct pt_regs *regs)
{
struct frame_tail __user *tail;
if (perf_guest_cbs && perf_guest_cbs->is_in_guest()) {
/* We don't support guest os callchain now */
return;
}
tail = (struct frame_tail __user *)regs->ARM_fp - 1;
@@ -603,9 +602,41 @@ perf_callchain_kernel(struct perf_callchain_entry *entry, struct pt_regs *regs)
{
struct stackframe fr;
if (perf_guest_cbs && perf_guest_cbs->is_in_guest()) {
/* We don't support guest os callchain now */
return;
}
fr.fp = regs->ARM_fp;
fr.sp = regs->ARM_sp;
fr.lr = regs->ARM_lr;
fr.pc = regs->ARM_pc;
walk_stackframe(&fr, callchain_trace, entry);
}
unsigned long perf_instruction_pointer(struct pt_regs *regs)
{
if (perf_guest_cbs && perf_guest_cbs->is_in_guest())
return perf_guest_cbs->get_guest_ip();
return instruction_pointer(regs);
}
unsigned long perf_misc_flags(struct pt_regs *regs)
{
int misc = 0;
if (perf_guest_cbs && perf_guest_cbs->is_in_guest()) {
if (perf_guest_cbs->is_user_mode())
misc |= PERF_RECORD_MISC_GUEST_USER;
else
misc |= PERF_RECORD_MISC_GUEST_KERNEL;
} else {
if (user_mode(regs))
misc |= PERF_RECORD_MISC_USER;
else
misc |= PERF_RECORD_MISC_KERNEL;
}
return misc;
}

80
arch/arm/kernel/perf_event_cpu.c
View File

@@ -23,6 +23,7 @@
#include <linux/kernel.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <asm/cputype.h>
@@ -45,7 +46,7 @@ const char *perf_pmu_name(void)
if (!cpu_pmu)
return NULL;
return cpu_pmu->pmu.name;
return cpu_pmu->name;
}
EXPORT_SYMBOL_GPL(perf_pmu_name);
@@ -70,7 +71,7 @@ static struct pmu_hw_events *cpu_pmu_get_cpu_events(void)
return &__get_cpu_var(cpu_hw_events);
}
static void cpu_pmu_free_irq(void)
static void cpu_pmu_free_irq(struct arm_pmu *cpu_pmu)
{
int i, irq, irqs;
struct platform_device *pmu_device = cpu_pmu->plat_device;
@@ -86,7 +87,7 @@ static void cpu_pmu_free_irq(void)
}
}
static int cpu_pmu_request_irq(irq_handler_t handler)
static int cpu_pmu_request_irq(struct arm_pmu *cpu_pmu, irq_handler_t handler)
{
int i, err, irq, irqs;
struct platform_device *pmu_device = cpu_pmu->plat_device;
@@ -147,7 +148,7 @@ static void __devinit cpu_pmu_init(struct arm_pmu *cpu_pmu)
/* Ensure the PMU has sane values out of reset. */
if (cpu_pmu && cpu_pmu->reset)
on_each_cpu(cpu_pmu->reset, NULL, 1);
on_each_cpu(cpu_pmu->reset, cpu_pmu, 1);
}
/*
@@ -163,7 +164,9 @@ static int __cpuinit cpu_pmu_notify(struct notifier_block *b,
return NOTIFY_DONE;
if (cpu_pmu && cpu_pmu->reset)
cpu_pmu->reset(NULL);
cpu_pmu->reset(cpu_pmu);
else
return NOTIFY_DONE;
return NOTIFY_OK;
}
@@ -195,13 +198,13 @@ static struct platform_device_id __devinitdata cpu_pmu_plat_device_ids[] = {
/*
* CPU PMU identification and probing.
*/
static struct arm_pmu *__devinit probe_current_pmu(void)
static int __devinit probe_current_pmu(struct arm_pmu *pmu)
{
struct arm_pmu *pmu = NULL;
int cpu = get_cpu();
unsigned long cpuid = read_cpuid_id();
unsigned long implementor = (cpuid & 0xFF000000) >> 24;
unsigned long part_number = (cpuid & 0xFFF0);
int ret = -ENODEV;
pr_info("probing PMU on CPU %d\n", cpu);
@@ -211,25 +214,25 @@ static struct arm_pmu *__devinit probe_current_pmu(void)
case 0xB360: /* ARM1136 */
case 0xB560: /* ARM1156 */
case 0xB760: /* ARM1176 */
pmu = armv6pmu_init();
ret = armv6pmu_init(pmu);
break;
case 0xB020: /* ARM11mpcore */
pmu = armv6mpcore_pmu_init();
ret = armv6mpcore_pmu_init(pmu);
break;
case 0xC080: /* Cortex-A8 */
pmu = armv7_a8_pmu_init();
ret = armv7_a8_pmu_init(pmu);
break;
case 0xC090: /* Cortex-A9 */
pmu = armv7_a9_pmu_init();
ret = armv7_a9_pmu_init(pmu);
break;
case 0xC050: /* Cortex-A5 */
pmu = armv7_a5_pmu_init();
ret = armv7_a5_pmu_init(pmu);
break;
case 0xC0F0: /* Cortex-A15 */
pmu = armv7_a15_pmu_init();
ret = armv7_a15_pmu_init(pmu);
break;
case 0xC070: /* Cortex-A7 */
pmu = armv7_a7_pmu_init();
ret = armv7_a7_pmu_init(pmu);
break;
}
/* Intel CPUs [xscale]. */
@@ -237,43 +240,54 @@ static struct arm_pmu *__devinit probe_current_pmu(void)
part_number = (cpuid >> 13) & 0x7;
switch (part_number) {
case 1:
pmu = xscale1pmu_init();
ret = xscale1pmu_init(pmu);
break;
case 2:
pmu = xscale2pmu_init();
ret = xscale2pmu_init(pmu);
break;
}
}
put_cpu();
return pmu;
return ret;
}
static int __devinit cpu_pmu_device_probe(struct platform_device *pdev)
{
const struct of_device_id *of_id;
struct arm_pmu *(*init_fn)(void);
int (*init_fn)(struct arm_pmu *);
struct device_node *node = pdev->dev.of_node;
struct arm_pmu *pmu;
int ret = -ENODEV;
if (cpu_pmu) {
pr_info("attempt to register multiple PMU devices!");
return -ENOSPC;
}
if (node && (of_id = of_match_node(cpu_pmu_of_device_ids, pdev->dev.of_node))) {
init_fn = of_id->data;
cpu_pmu = init_fn();
} else {
cpu_pmu = probe_current_pmu();
pmu = kzalloc(sizeof(struct arm_pmu), GFP_KERNEL);
if (!pmu) {
pr_info("failed to allocate PMU device!");
return -ENOMEM;
}
if (!cpu_pmu)
return -ENODEV;
if (node && (of_id = of_match_node(cpu_pmu_of_device_ids, pdev->dev.of_node))) {
init_fn = of_id->data;
ret = init_fn(pmu);
} else {
ret = probe_current_pmu(pmu);
}
if (ret) {
pr_info("failed to register PMU devices!");
kfree(pmu);
return ret;
}
cpu_pmu = pmu;
cpu_pmu->plat_device = pdev;
cpu_pmu_init(cpu_pmu);
register_cpu_notifier(&cpu_pmu_hotplug_notifier);
armpmu_register(cpu_pmu, cpu_pmu->name, PERF_TYPE_RAW);
armpmu_register(cpu_pmu, PERF_TYPE_RAW);
return 0;
}
@@ -290,6 +304,16 @@ static struct platform_driver cpu_pmu_driver = {
static int __init register_pmu_driver(void)
{
return platform_driver_register(&cpu_pmu_driver);
int err;
err = register_cpu_notifier(&cpu_pmu_hotplug_notifier);
if (err)
return err;
err = platform_driver_register(&cpu_pmu_driver);
if (err)
unregister_cpu_notifier(&cpu_pmu_hotplug_notifier);
return err;
}
device_initcall(register_pmu_driver);

126
arch/arm/kernel/perf_event_v6.c
View File

@@ -401,9 +401,10 @@ armv6_pmcr_counter_has_overflowed(unsigned long pmcr,
return ret;
}
static inline u32
armv6pmu_read_counter(int counter)
static inline u32 armv6pmu_read_counter(struct perf_event *event)
{
struct hw_perf_event *hwc = &event->hw;
int counter = hwc->idx;
unsigned long value = 0;
if (ARMV6_CYCLE_COUNTER == counter)
@@ -418,10 +419,11 @@ armv6pmu_read_counter(int counter)
return value;
}
static inline void
armv6pmu_write_counter(int counter,
u32 value)
static inline void armv6pmu_write_counter(struct perf_event *event, u32 value)
{
struct hw_perf_event *hwc = &event->hw;
int counter = hwc->idx;
if (ARMV6_CYCLE_COUNTER == counter)
asm volatile("mcr p15, 0, %0, c15, c12, 1" : : "r"(value));
else if (ARMV6_COUNTER0 == counter)
@@ -432,12 +434,13 @@ armv6pmu_write_counter(int counter,
WARN_ONCE(1, "invalid counter number (%d)\n", counter);
}
static void
armv6pmu_enable_event(struct hw_perf_event *hwc,
int idx)
static void armv6pmu_enable_event(struct perf_event *event)
{
unsigned long val, mask, evt, flags;
struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
struct hw_perf_event *hwc = &event->hw;
struct pmu_hw_events *events = cpu_pmu->get_hw_events();
int idx = hwc->idx;
if (ARMV6_CYCLE_COUNTER == idx) {
mask = 0;
@@ -473,7 +476,8 @@ armv6pmu_handle_irq(int irq_num,
{
unsigned long pmcr = armv6_pmcr_read();
struct perf_sample_data data;
struct pmu_hw_events *cpuc;
struct arm_pmu *cpu_pmu = (struct arm_pmu *)dev;
struct pmu_hw_events *cpuc = cpu_pmu->get_hw_events();
struct pt_regs *regs;
int idx;
@@ -489,7 +493,6 @@ armv6pmu_handle_irq(int irq_num,
*/
armv6_pmcr_write(pmcr);
cpuc = &__get_cpu_var(cpu_hw_events);
for (idx = 0; idx < cpu_pmu->num_events; ++idx) {
struct perf_event *event = cpuc->events[idx];
struct hw_perf_event *hwc;
@@ -506,13 +509,13 @@ armv6pmu_handle_irq(int irq_num,
continue;
hwc = &event->hw;
armpmu_event_update(event, hwc, idx);
armpmu_event_update(event);
perf_sample_data_init(&data, 0, hwc->last_period);
if (!armpmu_event_set_period(event, hwc, idx))
if (!armpmu_event_set_period(event))
continue;
if (perf_event_overflow(event, &data, regs))
cpu_pmu->disable(hwc, idx);
cpu_pmu->disable(event);
}
/*
@@ -527,8 +530,7 @@ armv6pmu_handle_irq(int irq_num,
return IRQ_HANDLED;
}
static void
armv6pmu_start(void)
static void armv6pmu_start(struct arm_pmu *cpu_pmu)
{
unsigned long flags, val;
struct pmu_hw_events *events = cpu_pmu->get_hw_events();
@@ -540,8 +542,7 @@ armv6pmu_start(void)
raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
}
static void
armv6pmu_stop(void)
static void armv6pmu_stop(struct arm_pmu *cpu_pmu)
{
unsigned long flags, val;
struct pmu_hw_events *events = cpu_pmu->get_hw_events();
@@ -555,10 +556,11 @@ armv6pmu_stop(void)
static int
armv6pmu_get_event_idx(struct pmu_hw_events *cpuc,
struct hw_perf_event *event)
struct perf_event *event)
{
struct hw_perf_event *hwc = &event->hw;
/* Always place a cycle counter into the cycle counter. */
if (ARMV6_PERFCTR_CPU_CYCLES == event->config_base) {
if (ARMV6_PERFCTR_CPU_CYCLES == hwc->config_base) {
if (test_and_set_bit(ARMV6_CYCLE_COUNTER, cpuc->used_mask))
return -EAGAIN;
@@ -579,12 +581,13 @@ armv6pmu_get_event_idx(struct pmu_hw_events *cpuc,
}
}
static void
armv6pmu_disable_event(struct hw_perf_event *hwc,
int idx)
static void armv6pmu_disable_event(struct perf_event *event)
{
unsigned long val, mask, evt, flags;
struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
struct hw_perf_event *hwc = &event->hw;
struct pmu_hw_events *events = cpu_pmu->get_hw_events();
int idx = hwc->idx;
if (ARMV6_CYCLE_COUNTER == idx) {
mask = ARMV6_PMCR_CCOUNT_IEN;
@@ -613,12 +616,13 @@ armv6pmu_disable_event(struct hw_perf_event *hwc,
raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
}
static void
armv6mpcore_pmu_disable_event(struct hw_perf_event *hwc,
int idx)
static void armv6mpcore_pmu_disable_event(struct perf_event *event)
{
unsigned long val, mask, flags, evt = 0;
struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
struct hw_perf_event *hwc = &event->hw;
struct pmu_hw_events *events = cpu_pmu->get_hw_events();
int idx = hwc->idx;
if (ARMV6_CYCLE_COUNTER == idx) {
mask = ARMV6_PMCR_CCOUNT_IEN;
@@ -649,24 +653,22 @@ static int armv6_map_event(struct perf_event *event)
&armv6_perf_cache_map, 0xFF);
}
static struct arm_pmu armv6pmu = {
.name = "v6",
.handle_irq = armv6pmu_handle_irq,
.enable = armv6pmu_enable_event,
.disable = armv6pmu_disable_event,
.read_counter = armv6pmu_read_counter,
.write_counter = armv6pmu_write_counter,
.get_event_idx = armv6pmu_get_event_idx,
.start = armv6pmu_start,
.stop = armv6pmu_stop,
.map_event = armv6_map_event,
.num_events = 3,
.max_period = (1LLU << 32) - 1,
};
static struct arm_pmu *__devinit armv6pmu_init(void)
static int __devinit armv6pmu_init(struct arm_pmu *cpu_pmu)
{
return &armv6pmu;
cpu_pmu->name = "v6";
cpu_pmu->handle_irq = armv6pmu_handle_irq;
cpu_pmu->enable = armv6pmu_enable_event;
cpu_pmu->disable = armv6pmu_disable_event;
cpu_pmu->read_counter = armv6pmu_read_counter;
cpu_pmu->write_counter = armv6pmu_write_counter;
cpu_pmu->get_event_idx = armv6pmu_get_event_idx;
cpu_pmu->start = armv6pmu_start;
cpu_pmu->stop = armv6pmu_stop;
cpu_pmu->map_event = armv6_map_event;
cpu_pmu->num_events = 3;
cpu_pmu->max_period = (1LLU << 32) - 1;
return 0;
}
/*
@@ -683,33 +685,31 @@ static int armv6mpcore_map_event(struct perf_event *event)
&armv6mpcore_perf_cache_map, 0xFF);
}
static struct arm_pmu armv6mpcore_pmu = {
.name = "v6mpcore",
.handle_irq = armv6pmu_handle_irq,
.enable = armv6pmu_enable_event,
.disable = armv6mpcore_pmu_disable_event,
.read_counter = armv6pmu_read_counter,
.write_counter = armv6pmu_write_counter,
.get_event_idx = armv6pmu_get_event_idx,
.start = armv6pmu_start,
.stop = armv6pmu_stop,
.map_event = armv6mpcore_map_event,
.num_events = 3,
.max_period = (1LLU << 32) - 1,
};
static struct arm_pmu *__devinit armv6mpcore_pmu_init(void)
static int __devinit armv6mpcore_pmu_init(struct arm_pmu *cpu_pmu)
{
return &armv6mpcore_pmu;
cpu_pmu->name = "v6mpcore";
cpu_pmu->handle_irq = armv6pmu_handle_irq;
cpu_pmu->enable = armv6pmu_enable_event;
cpu_pmu->disable = armv6mpcore_pmu_disable_event;
cpu_pmu->read_counter = armv6pmu_read_counter;
cpu_pmu->write_counter = armv6pmu_write_counter;
cpu_pmu->get_event_idx = armv6pmu_get_event_idx;
cpu_pmu->start = armv6pmu_start;
cpu_pmu->stop = armv6pmu_stop;
cpu_pmu->map_event = armv6mpcore_map_event;
cpu_pmu->num_events = 3;
cpu_pmu->max_period = (1LLU << 32) - 1;
return 0;
}
#else
static struct arm_pmu *__devinit armv6pmu_init(void)
static int armv6pmu_init(struct arm_pmu *cpu_pmu)
{
return NULL;
return -ENODEV;
}
static struct arm_pmu *__devinit armv6mpcore_pmu_init(void)
static int armv6mpcore_pmu_init(struct arm_pmu *cpu_pmu)
{
return NULL;
return -ENODEV;
}
#endif /* CONFIG_CPU_V6 || CONFIG_CPU_V6K */

246
arch/arm/kernel/perf_event_v7.c
View File

@@ -18,8 +18,6 @@
#ifdef CONFIG_CPU_V7
static struct arm_pmu armv7pmu;
/*
* Common ARMv7 event types
*
@@ -738,7 +736,8 @@ static const unsigned armv7_a7_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
*/
#define ARMV7_IDX_CYCLE_COUNTER 0
#define ARMV7_IDX_COUNTER0 1
#define ARMV7_IDX_COUNTER_LAST (ARMV7_IDX_CYCLE_COUNTER + cpu_pmu->num_events - 1)
#define ARMV7_IDX_COUNTER_LAST(cpu_pmu) \
(ARMV7_IDX_CYCLE_COUNTER + cpu_pmu->num_events - 1)
#define ARMV7_MAX_COUNTERS 32
#define ARMV7_COUNTER_MASK (ARMV7_MAX_COUNTERS - 1)
@@ -804,49 +803,34 @@ static inline int armv7_pmnc_has_overflowed(u32 pmnc)
return pmnc & ARMV7_OVERFLOWED_MASK;
}
static inline int armv7_pmnc_counter_valid(int idx)
static inline int armv7_pmnc_counter_valid(struct arm_pmu *cpu_pmu, int idx)
{
return idx >= ARMV7_IDX_CYCLE_COUNTER && idx <= ARMV7_IDX_COUNTER_LAST;
return idx >= ARMV7_IDX_CYCLE_COUNTER &&
idx <= ARMV7_IDX_COUNTER_LAST(cpu_pmu);
}
static inline int armv7_pmnc_counter_has_overflowed(u32 pmnc, int idx)
{
int ret = 0;
u32 counter;
if (!armv7_pmnc_counter_valid(idx)) {
pr_err("CPU%u checking wrong counter %d overflow status\n",
smp_processor_id(), idx);
} else {
counter = ARMV7_IDX_TO_COUNTER(idx);
ret = pmnc & BIT(counter);
}
return ret;
return pmnc & BIT(ARMV7_IDX_TO_COUNTER(idx));
}
static inline int armv7_pmnc_select_counter(int idx)
{
u32 counter;
if (!armv7_pmnc_counter_valid(idx)) {
pr_err("CPU%u selecting wrong PMNC counter %d\n",
smp_processor_id(), idx);
return -EINVAL;
}
counter = ARMV7_IDX_TO_COUNTER(idx);
u32 counter = ARMV7_IDX_TO_COUNTER(idx);
asm volatile("mcr p15, 0, %0, c9, c12, 5" : : "r" (counter));
isb();
return idx;
}
static inline u32 armv7pmu_read_counter(int idx)
static inline u32 armv7pmu_read_counter(struct perf_event *event)
{
struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
struct hw_perf_event *hwc = &event->hw;
int idx = hwc->idx;
u32 value = 0;
if (!armv7_pmnc_counter_valid(idx))
if (!armv7_pmnc_counter_valid(cpu_pmu, idx))
pr_err("CPU%u reading wrong counter %d\n",
smp_processor_id(), idx);
else if (idx == ARMV7_IDX_CYCLE_COUNTER)
@@ -857,9 +841,13 @@ static inline u32 armv7pmu_read_counter(int idx)
return value;
}
static inline void armv7pmu_write_counter(int idx, u32 value)
static inline void armv7pmu_write_counter(struct perf_event *event, u32 value)
{
if (!armv7_pmnc_counter_valid(idx))
struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
struct hw_perf_event *hwc = &event->hw;
int idx = hwc->idx;
if (!armv7_pmnc_counter_valid(cpu_pmu, idx))
pr_err("CPU%u writing wrong counter %d\n",
smp_processor_id(), idx);
else if (idx == ARMV7_IDX_CYCLE_COUNTER)
@@ -878,60 +866,28 @@ static inline void armv7_pmnc_write_evtsel(int idx, u32 val)
static inline int armv7_pmnc_enable_counter(int idx)
{
u32 counter;
if (!armv7_pmnc_counter_valid(idx)) {
pr_err("CPU%u enabling wrong PMNC counter %d\n",
smp_processor_id(), idx);
return -EINVAL;
}
counter = ARMV7_IDX_TO_COUNTER(idx);
u32 counter = ARMV7_IDX_TO_COUNTER(idx);
asm volatile("mcr p15, 0, %0, c9, c12, 1" : : "r" (BIT(counter)));
return idx;
}
static inline int armv7_pmnc_disable_counter(int idx)
{
u32 counter;
if (!armv7_pmnc_counter_valid(idx)) {
pr_err("CPU%u disabling wrong PMNC counter %d\n",
smp_processor_id(), idx);
return -EINVAL;
}
counter = ARMV7_IDX_TO_COUNTER(idx);
u32 counter = ARMV7_IDX_TO_COUNTER(idx);
asm volatile("mcr p15, 0, %0, c9, c12, 2" : : "r" (BIT(counter)));
return idx;
}
static inline int armv7_pmnc_enable_intens(int idx)
{
u32 counter;
if (!armv7_pmnc_counter_valid(idx)) {
pr_err("CPU%u enabling wrong PMNC counter IRQ enable %d\n",
smp_processor_id(), idx);
return -EINVAL;
}
counter = ARMV7_IDX_TO_COUNTER(idx);
u32 counter = ARMV7_IDX_TO_COUNTER(idx);
asm volatile("mcr p15, 0, %0, c9, c14, 1" : : "r" (BIT(counter)));
return idx;
}
static inline int armv7_pmnc_disable_intens(int idx)
{
u32 counter;
if (!armv7_pmnc_counter_valid(idx)) {
pr_err("CPU%u disabling wrong PMNC counter IRQ enable %d\n",
smp_processor_id(), idx);
return -EINVAL;
}
counter = ARMV7_IDX_TO_COUNTER(idx);
u32 counter = ARMV7_IDX_TO_COUNTER(idx);
asm volatile("mcr p15, 0, %0, c9, c14, 2" : : "r" (BIT(counter)));
isb();
/* Clear the overflow flag in case an interrupt is pending. */
@@ -956,7 +912,7 @@ static inline u32 armv7_pmnc_getreset_flags(void)
}
#ifdef DEBUG
static void armv7_pmnc_dump_regs(void)
static void armv7_pmnc_dump_regs(struct arm_pmu *cpu_pmu)
{
u32 val;
unsigned int cnt;
@@ -981,7 +937,8 @@ static void armv7_pmnc_dump_regs(void)
asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r" (val));
printk(KERN_INFO "CCNT =0x%08x\n", val);
for (cnt = ARMV7_IDX_COUNTER0; cnt <= ARMV7_IDX_COUNTER_LAST; cnt++) {
for (cnt = ARMV7_IDX_COUNTER0;
cnt <= ARMV7_IDX_COUNTER_LAST(cpu_pmu); cnt++) {
armv7_pmnc_select_counter(cnt);
asm volatile("mrc p15, 0, %0, c9, c13, 2" : "=r" (val));
printk(KERN_INFO "CNT[%d] count =0x%08x\n",
@@ -993,10 +950,19 @@ static void armv7_pmnc_dump_regs(void)
}
#endif
static void armv7pmu_enable_event(struct hw_perf_event *hwc, int idx)
static void armv7pmu_enable_event(struct perf_event *event)
{
unsigned long flags;
struct hw_perf_event *hwc = &event->hw;
struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
struct pmu_hw_events *events = cpu_pmu->get_hw_events();
int idx = hwc->idx;
if (!armv7_pmnc_counter_valid(cpu_pmu, idx)) {
pr_err("CPU%u enabling wrong PMNC counter IRQ enable %d\n",
smp_processor_id(), idx);
return;
}
/*
* Enable counter and interrupt, and set the counter to count
@@ -1014,7 +980,7 @@ static void armv7pmu_enable_event(struct hw_perf_event *hwc, int idx)
* We only need to set the event for the cycle counter if we
* have the ability to perform event filtering.
*/
if (armv7pmu.set_event_filter || idx != ARMV7_IDX_CYCLE_COUNTER)
if (cpu_pmu->set_event_filter || idx != ARMV7_IDX_CYCLE_COUNTER)
armv7_pmnc_write_evtsel(idx, hwc->config_base);
/*
@@ -1030,10 +996,19 @@ static void armv7pmu_enable_event(struct hw_perf_event *hwc, int idx)
raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
}
static void armv7pmu_disable_event(struct hw_perf_event *hwc, int idx)
static void armv7pmu_disable_event(struct perf_event *event)
{
unsigned long flags;
struct hw_perf_event *hwc = &event->hw;
struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
struct pmu_hw_events *events = cpu_pmu->get_hw_events();
int idx = hwc->idx;
if (!armv7_pmnc_counter_valid(cpu_pmu, idx)) {
pr_err("CPU%u disabling wrong PMNC counter IRQ enable %d\n",
smp_processor_id(), idx);
return;
}
/*
* Disable counter and interrupt
@@ -1057,7 +1032,8 @@ static irqreturn_t armv7pmu_handle_irq(int irq_num, void *dev)
{
u32 pmnc;
struct perf_sample_data data;
struct pmu_hw_events *cpuc;
struct arm_pmu *cpu_pmu = (struct arm_pmu *)dev;
struct pmu_hw_events *cpuc = cpu_pmu->get_hw_events();
struct pt_regs *regs;
int idx;
@@ -1077,7 +1053,6 @@ static irqreturn_t armv7pmu_handle_irq(int irq_num, void *dev)
*/
regs = get_irq_regs();
cpuc = &__get_cpu_var(cpu_hw_events);
for (idx = 0; idx < cpu_pmu->num_events; ++idx) {
struct perf_event *event = cpuc->events[idx];
struct hw_perf_event *hwc;
@@ -1094,13 +1069,13 @@ static irqreturn_t armv7pmu_handle_irq(int irq_num, void *dev)
continue;
hwc = &event->hw;
armpmu_event_update(event, hwc, idx);
armpmu_event_update(event);
perf_sample_data_init(&data, 0, hwc->last_period);
if (!armpmu_event_set_period(event, hwc, idx))
if (!armpmu_event_set_period(event))
continue;
if (perf_event_overflow(event, &data, regs))
cpu_pmu->disable(hwc, idx);
cpu_pmu->disable(event);
}
/*
@@ -1115,7 +1090,7 @@ static irqreturn_t armv7pmu_handle_irq(int irq_num, void *dev)
return IRQ_HANDLED;
}
static void armv7pmu_start(void)
static void armv7pmu_start(struct arm_pmu *cpu_pmu)
{
unsigned long flags;
struct pmu_hw_events *events = cpu_pmu->get_hw_events();
@@ -1126,7 +1101,7 @@ static void armv7pmu_start(void)
raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
}
static void armv7pmu_stop(void)
static void armv7pmu_stop(struct arm_pmu *cpu_pmu)
{
unsigned long flags;
struct pmu_hw_events *events = cpu_pmu->get_hw_events();
@@ -1138,10 +1113,12 @@ static void armv7pmu_stop(void)
}
static int armv7pmu_get_event_idx(struct pmu_hw_events *cpuc,
struct hw_perf_event *event)
struct perf_event *event)
{
int idx;
unsigned long evtype = event->config_base & ARMV7_EVTYPE_EVENT;
struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
struct hw_perf_event *hwc = &event->hw;
unsigned long evtype = hwc->config_base & ARMV7_EVTYPE_EVENT;
/* Always place a cycle counter into the cycle counter. */
if (evtype == ARMV7_PERFCTR_CPU_CYCLES) {
@@ -1192,11 +1169,14 @@ static int armv7pmu_set_event_filter(struct hw_perf_event *event,
static void armv7pmu_reset(void *info)
{
struct arm_pmu *cpu_pmu = (struct arm_pmu *)info;
u32 idx, nb_cnt = cpu_pmu->num_events;
/* The counter and interrupt enable registers are unknown at reset. */
for (idx = ARMV7_IDX_CYCLE_COUNTER; idx < nb_cnt; ++idx)
armv7pmu_disable_event(NULL, idx);
for (idx = ARMV7_IDX_CYCLE_COUNTER; idx < nb_cnt; ++idx) {
armv7_pmnc_disable_counter(idx);
armv7_pmnc_disable_intens(idx);
}
/* Initialize & Reset PMNC: C and P bits */
armv7_pmnc_write(ARMV7_PMNC_P | ARMV7_PMNC_C);
@@ -1232,17 +1212,18 @@ static int armv7_a7_map_event(struct perf_event *event)
&armv7_a7_perf_cache_map, 0xFF);
}
static struct arm_pmu armv7pmu = {
.handle_irq = armv7pmu_handle_irq,
.enable = armv7pmu_enable_event,
.disable = armv7pmu_disable_event,
.read_counter = armv7pmu_read_counter,
.write_counter = armv7pmu_write_counter,
.get_event_idx = armv7pmu_get_event_idx,
.start = armv7pmu_start,
.stop = armv7pmu_stop,
.reset = armv7pmu_reset,
.max_period = (1LLU << 32) - 1,
static void armv7pmu_init(struct arm_pmu *cpu_pmu)
{
cpu_pmu->handle_irq = armv7pmu_handle_irq;
cpu_pmu->enable = armv7pmu_enable_event;
cpu_pmu->disable = armv7pmu_disable_event;
cpu_pmu->read_counter = armv7pmu_read_counter;
cpu_pmu->write_counter = armv7pmu_write_counter;
cpu_pmu->get_event_idx = armv7pmu_get_event_idx;
cpu_pmu->start = armv7pmu_start;
cpu_pmu->stop = armv7pmu_stop;
cpu_pmu->reset = armv7pmu_reset;
cpu_pmu->max_period = (1LLU << 32) - 1;
};
static u32 __devinit armv7_read_num_pmnc_events(void)
@@ -1256,70 +1237,75 @@ static u32 __devinit armv7_read_num_pmnc_events(void)
return nb_cnt + 1;
}
static struct arm_pmu *__devinit armv7_a8_pmu_init(void)
static int __devinit armv7_a8_pmu_init(struct arm_pmu *cpu_pmu)
{
armv7pmu.name = "ARMv7 Cortex-A8";
armv7pmu.map_event = armv7_a8_map_event;
armv7pmu.num_events = armv7_read_num_pmnc_events();
return &armv7pmu;
armv7pmu_init(cpu_pmu);
cpu_pmu->name = "ARMv7 Cortex-A8";
cpu_pmu->map_event = armv7_a8_map_event;
cpu_pmu->num_events = armv7_read_num_pmnc_events();
return 0;
}
static struct arm_pmu *__devinit armv7_a9_pmu_init(void)
static int __devinit armv7_a9_pmu_init(struct arm_pmu *cpu_pmu)
{
armv7pmu.name = "ARMv7 Cortex-A9";
armv7pmu.map_event = armv7_a9_map_event;
armv7pmu.num_events = armv7_read_num_pmnc_events();
return &armv7pmu;
armv7pmu_init(cpu_pmu);
cpu_pmu->name = "ARMv7 Cortex-A9";
cpu_pmu->map_event = armv7_a9_map_event;
cpu_pmu->num_events = armv7_read_num_pmnc_events();
return 0;
}
static struct arm_pmu *__devinit armv7_a5_pmu_init(void)
static int __devinit armv7_a5_pmu_init(struct arm_pmu *cpu_pmu)
{
armv7pmu.name = "ARMv7 Cortex-A5";
armv7pmu.map_event = armv7_a5_map_event;
armv7pmu.num_events = armv7_read_num_pmnc_events();
return &armv7pmu;
armv7pmu_init(cpu_pmu);
cpu_pmu->name = "ARMv7 Cortex-A5";
cpu_pmu->map_event = armv7_a5_map_event;
cpu_pmu->num_events = armv7_read_num_pmnc_events();
return 0;
}
static struct arm_pmu *__devinit armv7_a15_pmu_init(void)
static int __devinit armv7_a15_pmu_init(struct arm_pmu *cpu_pmu)
{
armv7pmu.name = "ARMv7 Cortex-A15";
armv7pmu.map_event = armv7_a15_map_event;
armv7pmu.num_events = armv7_read_num_pmnc_events();
armv7pmu.set_event_filter = armv7pmu_set_event_filter;
return &armv7pmu;
armv7pmu_init(cpu_pmu);
cpu_pmu->name = "ARMv7 Cortex-A15";
cpu_pmu->map_event = armv7_a15_map_event;
cpu_pmu->num_events = armv7_read_num_pmnc_events();
cpu_pmu->set_event_filter = armv7pmu_set_event_filter;
return 0;
}
static struct arm_pmu *__devinit armv7_a7_pmu_init(void)
static int __devinit armv7_a7_pmu_init(struct arm_pmu *cpu_pmu)
{
armv7pmu.name = "ARMv7 Cortex-A7";
armv7pmu.map_event = armv7_a7_map_event;
armv7pmu.num_events = armv7_read_num_pmnc_events();
armv7pmu.set_event_filter = armv7pmu_set_event_filter;
return &armv7pmu;
armv7pmu_init(cpu_pmu);
cpu_pmu->name = "ARMv7 Cortex-A7";
cpu_pmu->map_event = armv7_a7_map_event;
cpu_pmu->num_events = armv7_read_num_pmnc_events();
cpu_pmu->set_event_filter = armv7pmu_set_event_filter;
return 0;
}
#else
static struct arm_pmu *__devinit armv7_a8_pmu_init(void)
static inline int armv7_a8_pmu_init(struct arm_pmu *cpu_pmu)
{
return NULL;
return -ENODEV;
}
static struct arm_pmu *__devinit armv7_a9_pmu_init(void)
static inline int armv7_a9_pmu_init(struct arm_pmu *cpu_pmu)
{
return NULL;
return -ENODEV;
}
static struct arm_pmu *__devinit armv7_a5_pmu_init(void)
static inline int armv7_a5_pmu_init(struct arm_pmu *cpu_pmu)
{
return NULL;
return -ENODEV;
}
static struct arm_pmu *__devinit armv7_a15_pmu_init(void)
static inline int armv7_a15_pmu_init(struct arm_pmu *cpu_pmu)
{
return NULL;
return -ENODEV;
}
static struct arm_pmu *__devinit armv7_a7_pmu_init(void)
static inline int armv7_a7_pmu_init(struct arm_pmu *cpu_pmu)
{
return NULL;
return -ENODEV;
}
#endif /* CONFIG_CPU_V7 */

157
arch/arm/kernel/perf_event_xscale.c
View File

@@ -224,7 +224,8 @@ xscale1pmu_handle_irq(int irq_num, void *dev)
{
unsigned long pmnc;
struct perf_sample_data data;
struct pmu_hw_events *cpuc;
struct arm_pmu *cpu_pmu = (struct arm_pmu *)dev;
struct pmu_hw_events *cpuc = cpu_pmu->get_hw_events();
struct pt_regs *regs;
int idx;
@@ -248,7 +249,6 @@ xscale1pmu_handle_irq(int irq_num, void *dev)
regs = get_irq_regs();
cpuc = &__get_cpu_var(cpu_hw_events);
for (idx = 0; idx < cpu_pmu->num_events; ++idx) {
struct perf_event *event = cpuc->events[idx];
struct hw_perf_event *hwc;
@@ -260,13 +260,13 @@ xscale1pmu_handle_irq(int irq_num, void *dev)
continue;
hwc = &event->hw;
armpmu_event_update(event, hwc, idx);
armpmu_event_update(event);
perf_sample_data_init(&data, 0, hwc->last_period);
if (!armpmu_event_set_period(event, hwc, idx))
if (!armpmu_event_set_period(event))
continue;
if (perf_event_overflow(event, &data, regs))
cpu_pmu->disable(hwc, idx);
cpu_pmu->disable(event);
}
irq_work_run();
@@ -280,11 +280,13 @@ xscale1pmu_handle_irq(int irq_num, void *dev)
return IRQ_HANDLED;
}
static void
xscale1pmu_enable_event(struct hw_perf_event *hwc, int idx)
static void xscale1pmu_enable_event(struct perf_event *event)
{
unsigned long val, mask, evt, flags;
struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
struct hw_perf_event *hwc = &event->hw;
struct pmu_hw_events *events = cpu_pmu->get_hw_events();
int idx = hwc->idx;
switch (idx) {
case XSCALE_CYCLE_COUNTER:
@@ -314,11 +316,13 @@ xscale1pmu_enable_event(struct hw_perf_event *hwc, int idx)
raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
}
static void
xscale1pmu_disable_event(struct hw_perf_event *hwc, int idx)
static void xscale1pmu_disable_event(struct perf_event *event)
{
unsigned long val, mask, evt, flags;
struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
struct hw_perf_event *hwc = &event->hw;
struct pmu_hw_events *events = cpu_pmu->get_hw_events();
int idx = hwc->idx;
switch (idx) {
case XSCALE_CYCLE_COUNTER:
@@ -348,9 +352,10 @@ xscale1pmu_disable_event(struct hw_perf_event *hwc, int idx)
static int
xscale1pmu_get_event_idx(struct pmu_hw_events *cpuc,
struct hw_perf_event *event)
struct perf_event *event)
{
if (XSCALE_PERFCTR_CCNT == event->config_base) {
struct hw_perf_event *hwc = &event->hw;
if (XSCALE_PERFCTR_CCNT == hwc->config_base) {
if (test_and_set_bit(XSCALE_CYCLE_COUNTER, cpuc->used_mask))
return -EAGAIN;
@@ -366,8 +371,7 @@ xscale1pmu_get_event_idx(struct pmu_hw_events *cpuc,
}
}
static void
xscale1pmu_start(void)
static void xscale1pmu_start(struct arm_pmu *cpu_pmu)
{
unsigned long flags, val;
struct pmu_hw_events *events = cpu_pmu->get_hw_events();
@@ -379,8 +383,7 @@ xscale1pmu_start(void)
raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
}
static void
xscale1pmu_stop(void)
static void xscale1pmu_stop(struct arm_pmu *cpu_pmu)
{
unsigned long flags, val;
struct pmu_hw_events *events = cpu_pmu->get_hw_events();
@@ -392,9 +395,10 @@ xscale1pmu_stop(void)
raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
}
static inline u32
xscale1pmu_read_counter(int counter)
static inline u32 xscale1pmu_read_counter(struct perf_event *event)
{
struct hw_perf_event *hwc = &event->hw;
int counter = hwc->idx;
u32 val = 0;
switch (counter) {
@@ -412,9 +416,11 @@ xscale1pmu_read_counter(int counter)
return val;
}
static inline void
xscale1pmu_write_counter(int counter, u32 val)
static inline void xscale1pmu_write_counter(struct perf_event *event, u32 val)
{
struct hw_perf_event *hwc = &event->hw;
int counter = hwc->idx;
switch (counter) {
case XSCALE_CYCLE_COUNTER:
asm volatile("mcr p14, 0, %0, c1, c0, 0" : : "r" (val));
@@ -434,24 +440,22 @@ static int xscale_map_event(struct perf_event *event)
&xscale_perf_cache_map, 0xFF);
}
static struct arm_pmu xscale1pmu = {
.name = "xscale1",
.handle_irq = xscale1pmu_handle_irq,
.enable = xscale1pmu_enable_event,
.disable = xscale1pmu_disable_event,
.read_counter = xscale1pmu_read_counter,
.write_counter = xscale1pmu_write_counter,
.get_event_idx = xscale1pmu_get_event_idx,
.start = xscale1pmu_start,
.stop = xscale1pmu_stop,
.map_event = xscale_map_event,
.num_events = 3,
.max_period = (1LLU << 32) - 1,
};
static struct arm_pmu *__devinit xscale1pmu_init(void)
static int __devinit xscale1pmu_init(struct arm_pmu *cpu_pmu)
{
return &xscale1pmu;
cpu_pmu->name = "xscale1";
cpu_pmu->handle_irq = xscale1pmu_handle_irq;
cpu_pmu->enable = xscale1pmu_enable_event;
cpu_pmu->disable = xscale1pmu_disable_event;
cpu_pmu->read_counter = xscale1pmu_read_counter;
cpu_pmu->write_counter = xscale1pmu_write_counter;
cpu_pmu->get_event_idx = xscale1pmu_get_event_idx;
cpu_pmu->start = xscale1pmu_start;
cpu_pmu->stop = xscale1pmu_stop;
cpu_pmu->map_event = xscale_map_event;
cpu_pmu->num_events = 3;
cpu_pmu->max_period = (1LLU << 32) - 1;
return 0;
}
#define XSCALE2_OVERFLOWED_MASK 0x01f
@@ -567,7 +571,8 @@ xscale2pmu_handle_irq(int irq_num, void *dev)
{
unsigned long pmnc, of_flags;
struct perf_sample_data data;
struct pmu_hw_events *cpuc;
struct arm_pmu *cpu_pmu = (struct arm_pmu *)dev;
struct pmu_hw_events *cpuc = cpu_pmu->get_hw_events();
struct pt_regs *regs;
int idx;
@@ -585,7 +590,6 @@ xscale2pmu_handle_irq(int irq_num, void *dev)
regs = get_irq_regs();
cpuc = &__get_cpu_var(cpu_hw_events);
for (idx = 0; idx < cpu_pmu->num_events; ++idx) {
struct perf_event *event = cpuc->events[idx];
struct hw_perf_event *hwc;
@@ -597,13 +601,13 @@ xscale2pmu_handle_irq(int irq_num, void *dev)
continue;
hwc = &event->hw;
armpmu_event_update(event, hwc, idx);
armpmu_event_update(event);
perf_sample_data_init(&data, 0, hwc->last_period);
if (!armpmu_event_set_period(event, hwc, idx))
if (!armpmu_event_set_period(event))
continue;
if (perf_event_overflow(event, &data, regs))
cpu_pmu->disable(hwc, idx);
cpu_pmu->disable(event);
}
irq_work_run();
@@ -617,11 +621,13 @@ xscale2pmu_handle_irq(int irq_num, void *dev)
return IRQ_HANDLED;
}
static void
xscale2pmu_enable_event(struct hw_perf_event *hwc, int idx)
static void xscale2pmu_enable_event(struct perf_event *event)
{
unsigned long flags, ien, evtsel;
struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
struct hw_perf_event *hwc = &event->hw;
struct pmu_hw_events *events = cpu_pmu->get_hw_events();
int idx = hwc->idx;
ien = xscale2pmu_read_int_enable();
evtsel = xscale2pmu_read_event_select();
@@ -661,11 +667,13 @@ xscale2pmu_enable_event(struct hw_perf_event *hwc, int idx)
raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
}
static void
xscale2pmu_disable_event(struct hw_perf_event *hwc, int idx)
static void xscale2pmu_disable_event(struct perf_event *event)
{
unsigned long flags, ien, evtsel, of_flags;
struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
struct hw_perf_event *hwc = &event->hw;
struct pmu_hw_events *events = cpu_pmu->get_hw_events();
int idx = hwc->idx;
ien = xscale2pmu_read_int_enable();
evtsel = xscale2pmu_read_event_select();
@@ -713,7 +721,7 @@ xscale2pmu_disable_event(struct hw_perf_event *hwc, int idx)
static int
xscale2pmu_get_event_idx(struct pmu_hw_events *cpuc,
struct hw_perf_event *event)
struct perf_event *event)
{
int idx = xscale1pmu_get_event_idx(cpuc, event);
if (idx >= 0)
@@ -727,8 +735,7 @@ out:
return idx;
}
static void
xscale2pmu_start(void)
static void xscale2pmu_start(struct arm_pmu *cpu_pmu)
{
unsigned long flags, val;
struct pmu_hw_events *events = cpu_pmu->get_hw_events();
@@ -740,8 +747,7 @@ xscale2pmu_start(void)
raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
}
static void
xscale2pmu_stop(void)
static void xscale2pmu_stop(struct arm_pmu *cpu_pmu)
{
unsigned long flags, val;
struct pmu_hw_events *events = cpu_pmu->get_hw_events();
@@ -753,9 +759,10 @@ xscale2pmu_stop(void)
raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
}
static inline u32
xscale2pmu_read_counter(int counter)
static inline u32 xscale2pmu_read_counter(struct perf_event *event)
{
struct hw_perf_event *hwc = &event->hw;
int counter = hwc->idx;
u32 val = 0;
switch (counter) {
@@ -779,9 +786,11 @@ xscale2pmu_read_counter(int counter)
return val;
}
static inline void
xscale2pmu_write_counter(int counter, u32 val)
static inline void xscale2pmu_write_counter(struct perf_event *event, u32 val)
{
struct hw_perf_event *hwc = &event->hw;
int counter = hwc->idx;
switch (counter) {
case XSCALE_CYCLE_COUNTER:
asm volatile("mcr p14, 0, %0, c1, c1, 0" : : "r" (val));
@@ -801,33 +810,31 @@ xscale2pmu_write_counter(int counter, u32 val)
}
}
static struct arm_pmu xscale2pmu = {
.name = "xscale2",
.handle_irq = xscale2pmu_handle_irq,
.enable = xscale2pmu_enable_event,
.disable = xscale2pmu_disable_event,
.read_counter = xscale2pmu_read_counter,
.write_counter = xscale2pmu_write_counter,
.get_event_idx = xscale2pmu_get_event_idx,
.start = xscale2pmu_start,
.stop = xscale2pmu_stop,
.map_event = xscale_map_event,
.num_events = 5,
.max_period = (1LLU << 32) - 1,
};
static struct arm_pmu *__devinit xscale2pmu_init(void)
static int __devinit xscale2pmu_init(struct arm_pmu *cpu_pmu)
{
return &xscale2pmu;
cpu_pmu->name = "xscale2";
cpu_pmu->handle_irq = xscale2pmu_handle_irq;
cpu_pmu->enable = xscale2pmu_enable_event;
cpu_pmu->disable = xscale2pmu_disable_event;
cpu_pmu->read_counter = xscale2pmu_read_counter;
cpu_pmu->write_counter = xscale2pmu_write_counter;
cpu_pmu->get_event_idx = xscale2pmu_get_event_idx;
cpu_pmu->start = xscale2pmu_start;
cpu_pmu->stop = xscale2pmu_stop;
cpu_pmu->map_event = xscale_map_event;
cpu_pmu->num_events = 5;
cpu_pmu->max_period = (1LLU << 32) - 1;
return 0;
}
#else
static struct arm_pmu *__devinit xscale1pmu_init(void)
static inline int xscale1pmu_init(struct arm_pmu *cpu_pmu)
{
return NULL;
return -ENODEV;
}
static struct arm_pmu *__devinit xscale2pmu_init(void)
static inline int xscale2pmu_init(struct arm_pmu *cpu_pmu)
{
return NULL;
return -ENODEV;
}
#endif /* CONFIG_CPU_XSCALE */

84
arch/arm/kernel/setup.c
View File

@@ -383,6 +383,12 @@ void cpu_init(void)
BUG();
}
/*
* This only works on resume and secondary cores. For booting on the
* boot cpu, smp_prepare_boot_cpu is called after percpu area setup.
*/
set_my_cpu_offset(per_cpu_offset(cpu));
cpu_proc_init();
/*
@@ -426,13 +432,14 @@ int __cpu_logical_map[NR_CPUS];
void __init smp_setup_processor_id(void)
{
int i;
u32 cpu = is_smp() ? read_cpuid_mpidr() & 0xff : 0;
u32 mpidr = is_smp() ? read_cpuid_mpidr() & MPIDR_HWID_BITMASK : 0;
u32 cpu = MPIDR_AFFINITY_LEVEL(mpidr, 0);
cpu_logical_map(0) = cpu;
for (i = 1; i < NR_CPUS; ++i)
for (i = 1; i < nr_cpu_ids; ++i)
cpu_logical_map(i) = i == cpu ? 0 : i;
printk(KERN_INFO "Booting Linux on physical CPU %d\n", cpu);
printk(KERN_INFO "Booting Linux on physical CPU 0x%x\n", mpidr);
}
static void __init setup_processor(void)
@@ -758,6 +765,7 @@ void __init setup_arch(char **cmdline_p)
unflatten_device_tree();
arm_dt_init_cpu_maps();
#ifdef CONFIG_SMP
if (is_smp()) {
smp_set_ops(mdesc->smp);
@@ -841,12 +849,9 @@ static const char *hwcap_str[] = {
static int c_show(struct seq_file *m, void *v)
{
int i;
int i, j;
u32 cpuid;
seq_printf(m, "Processor\t: %s rev %d (%s)\n",
cpu_name, read_cpuid_id() & 15, elf_platform);
#if defined(CONFIG_SMP)
for_each_online_cpu(i) {
/*
* glibc reads /proc/cpuinfo to determine the number of
@@ -854,45 +859,48 @@ static int c_show(struct seq_file *m, void *v)
* "processor". Give glibc what it expects.
*/
seq_printf(m, "processor\t: %d\n", i);
seq_printf(m, "BogoMIPS\t: %lu.%02lu\n\n",
cpuid = is_smp() ? per_cpu(cpu_data, i).cpuid : read_cpuid_id();
seq_printf(m, "model name\t: %s rev %d (%s)\n",
cpu_name, cpuid & 15, elf_platform);
#if defined(CONFIG_SMP)
seq_printf(m, "BogoMIPS\t: %lu.%02lu\n",
per_cpu(cpu_data, i).loops_per_jiffy / (500000UL/HZ),
(per_cpu(cpu_data, i).loops_per_jiffy / (5000UL/HZ)) % 100);
}
#else /* CONFIG_SMP */
seq_printf(m, "BogoMIPS\t: %lu.%02lu\n",
loops_per_jiffy / (500000/HZ),
(loops_per_jiffy / (5000/HZ)) % 100);
#else
seq_printf(m, "BogoMIPS\t: %lu.%02lu\n",
loops_per_jiffy / (500000/HZ),
(loops_per_jiffy / (5000/HZ)) % 100);
#endif
/* dump out the processor features */
seq_puts(m, "Features\t: ");
/* dump out the processor features */
seq_puts(m, "Features\t: ");
for (j = 0; hwcap_str[j]; j++)
if (elf_hwcap & (1 << j))
seq_printf(m, "%s ", hwcap_str[j]);
for (i = 0; hwcap_str[i]; i++)
if (elf_hwcap & (1 << i))
seq_printf(m, "%s ", hwcap_str[i]);
seq_printf(m, "\nCPU implementer\t: 0x%02x\n", cpuid >> 24);
seq_printf(m, "CPU architecture: %s\n",
proc_arch[cpu_architecture()]);
seq_printf(m, "\nCPU implementer\t: 0x%02x\n", read_cpuid_id() >> 24);
seq_printf(m, "CPU architecture: %s\n", proc_arch[cpu_architecture()]);
if ((read_cpuid_id() & 0x0008f000) == 0x00000000) {
/* pre-ARM7 */
seq_printf(m, "CPU part\t: %07x\n", read_cpuid_id() >> 4);
} else {
if ((read_cpuid_id() & 0x0008f000) == 0x00007000) {
/* ARM7 */
seq_printf(m, "CPU variant\t: 0x%02x\n",
(read_cpuid_id() >> 16) & 127);
if ((cpuid & 0x0008f000) == 0x00000000) {
/* pre-ARM7 */
seq_printf(m, "CPU part\t: %07x\n", cpuid >> 4);
} else {
/* post-ARM7 */
seq_printf(m, "CPU variant\t: 0x%x\n",
(read_cpuid_id() >> 20) & 15);
if ((cpuid & 0x0008f000) == 0x00007000) {
/* ARM7 */
seq_printf(m, "CPU variant\t: 0x%02x\n",
(cpuid >> 16) & 127);
} else {
/* post-ARM7 */
seq_printf(m, "CPU variant\t: 0x%x\n",
(cpuid >> 20) & 15);
}
seq_printf(m, "CPU part\t: 0x%03x\n",
(cpuid >> 4) & 0xfff);
}
seq_printf(m, "CPU part\t: 0x%03x\n",
(read_cpuid_id() >> 4) & 0xfff);
seq_printf(m, "CPU revision\t: %d\n\n", cpuid & 15);
}
seq_printf(m, "CPU revision\t: %d\n", read_cpuid_id() & 15);
seq_puts(m, "\n");
seq_printf(m, "Hardware\t: %s\n", machine_name);
seq_printf(m, "Revision\t: %04x\n", system_rev);

5
arch/arm/kernel/smp.c
View File

@@ -281,6 +281,7 @@ static void __cpuinit smp_store_cpu_info(unsigned int cpuid)
struct cpuinfo_arm *cpu_info = &per_cpu(cpu_data, cpuid);
cpu_info->loops_per_jiffy = loops_per_jiffy;
cpu_info->cpuid = read_cpuid_id();
store_cpu_topology(cpuid);
}
@@ -313,9 +314,10 @@ asmlinkage void __cpuinit secondary_start_kernel(void)
current->active_mm = mm;
cpumask_set_cpu(cpu, mm_cpumask(mm));
cpu_init();
printk("CPU%u: Booted secondary processor\n", cpu);
cpu_init();
preempt_disable();
trace_hardirqs_off();
@@ -371,6 +373,7 @@ void __init smp_cpus_done(unsigned int max_cpus)
void __init smp_prepare_boot_cpu(void)
{
set_my_cpu_offset(per_cpu_offset(smp_processor_id()));
}
void __init smp_prepare_cpus(unsigned int max_cpus)

42
arch/arm/kernel/topology.c
View File

@@ -196,32 +196,7 @@ static inline void parse_dt_topology(void) {}
static inline void update_cpu_power(unsigned int cpuid, unsigned int mpidr) {}
#endif
/*
* cpu topology management
*/
#define MPIDR_SMP_BITMASK (0x3 << 30)
#define MPIDR_SMP_VALUE (0x2 << 30)
#define MPIDR_MT_BITMASK (0x1 << 24)
/*
* These masks reflect the current use of the affinity levels.
* The affinity level can be up to 16 bits according to ARM ARM
*/
#define MPIDR_HWID_BITMASK 0xFFFFFF
#define MPIDR_LEVEL0_MASK 0x3
#define MPIDR_LEVEL0_SHIFT 0
#define MPIDR_LEVEL1_MASK 0xF
#define MPIDR_LEVEL1_SHIFT 8
#define MPIDR_LEVEL2_MASK 0xFF
#define MPIDR_LEVEL2_SHIFT 16
/*
/*
* cpu topology table
*/
struct cputopo_arm cpu_topology[NR_CPUS];
@@ -282,19 +257,14 @@ void store_cpu_topology(unsigned int cpuid)
if (mpidr & MPIDR_MT_BITMASK) {
/* core performance interdependency */
cpuid_topo->thread_id = (mpidr >> MPIDR_LEVEL0_SHIFT)
& MPIDR_LEVEL0_MASK;
cpuid_topo->core_id = (mpidr >> MPIDR_LEVEL1_SHIFT)
& MPIDR_LEVEL1_MASK;
cpuid_topo->socket_id = (mpidr >> MPIDR_LEVEL2_SHIFT)
& MPIDR_LEVEL2_MASK;
cpuid_topo->thread_id = MPIDR_AFFINITY_LEVEL(mpidr, 0);
cpuid_topo->core_id = MPIDR_AFFINITY_LEVEL(mpidr, 1);
cpuid_topo->socket_id = MPIDR_AFFINITY_LEVEL(mpidr, 2);
} else {
/* largely independent cores */
cpuid_topo->thread_id = -1;
cpuid_topo->core_id = (mpidr >> MPIDR_LEVEL0_SHIFT)
& MPIDR_LEVEL0_MASK;
cpuid_topo->socket_id = (mpidr >> MPIDR_LEVEL1_SHIFT)
& MPIDR_LEVEL1_MASK;
cpuid_topo->core_id = MPIDR_AFFINITY_LEVEL(mpidr, 0);
cpuid_topo->socket_id = MPIDR_AFFINITY_LEVEL(mpidr, 1);
}
} else {
/*