static int br_pass_frame_up(struct sk_buff *skb)
{
struct net_device *indev, *brdev = BR_INPUT_SKB_CB(skb)->brdev;
struct net_bridge *br = netdev_priv(brdev);
struct br_cpu_netstats *brstats = this_cpu_ptr(br->stats);
u64_stats_update_begin(&brstats->syncp);
brstats->rx_packets++;
brstats->rx_bytes += skb->len;
u64_stats_update_end(&brstats->syncp);
indev = skb->dev;
skb->dev = brdev;
br_drop_fake_rtable(skb);
return NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_IN, skb, indev, NULL,
netif_receive_skb);
}
/* Return true if fifo is not full */
static struct deferred_action *add_deferred_actions(struct sk_buff *skb,
const struct sw_flow_key *key,
const struct nlattr *actions,
const int actions_len)
{
struct action_fifo *fifo;
struct deferred_action *da;
fifo = this_cpu_ptr(action_fifos);
da = action_fifo_put(fifo);
if (da) {
da->skb = skb;
da->actions = actions;
da->actions_len = actions_len;
da->pkt_key = *key;
}
return da;
}
static int blk_cpu_notify(struct notifier_block *self, unsigned long action,
void *hcpu)
{
/*
* If a CPU goes away, splice its entries to the current CPU
* and trigger a run of the softirq
*/
if (action == CPU_DEAD || action == CPU_DEAD_FROZEN) {
int cpu = (unsigned long) hcpu;
local_irq_disable();
list_splice_init(&per_cpu(blk_cpu_done, cpu),
this_cpu_ptr(&blk_cpu_done));
raise_softirq_irqoff(BLOCK_SOFTIRQ);
local_irq_enable();
}
return NOTIFY_OK;
}
BPF_CALL_5(bpf_perf_event_output, struct pt_regs *, regs, struct bpf_map *, map,
u64, flags, void *, data, u64, size)
{
struct perf_sample_data *sd = this_cpu_ptr(&bpf_trace_sd);
struct perf_raw_record raw = {
.frag = {
.size = size,
.data = data,
},
};
if (unlikely(flags & ~(BPF_F_INDEX_MASK)))
return -EINVAL;
perf_sample_data_init(sd, 0, 0);
sd->raw = &raw;
return __bpf_perf_event_output(regs, map, flags, sd);
}
/*
* We cannot restore the ibs pmu state, so we always needs to update
* the event while stopping it and then reset the state when starting
* again. Thus, ignoring PERF_EF_RELOAD and PERF_EF_UPDATE flags in
* perf_ibs_start()/perf_ibs_stop() and instead always do it.
*/
static void perf_ibs_start(struct perf_event *event, int flags)
{
struct hw_perf_event *hwc = &event->hw;
struct perf_ibs *perf_ibs = container_of(event->pmu, struct perf_ibs, pmu);
struct cpu_perf_ibs *pcpu = this_cpu_ptr(perf_ibs->pcpu);
u64 period;
if (WARN_ON_ONCE(!(hwc->state & PERF_HES_STOPPED)))
return;
WARN_ON_ONCE(!(hwc->state & PERF_HES_UPTODATE));
hwc->state = 0;
perf_ibs_set_period(perf_ibs, hwc, &period);
set_bit(IBS_STARTED, pcpu->state);
perf_ibs_enable_event(perf_ibs, hwc, period >> 4);
perf_event_update_userpage(event);
}
/* note: already called with rcu_read_lock */
static rx_handler_result_t vrf_handle_frame(struct sk_buff **pskb)
{
struct sk_buff *skb = *pskb;
if (is_ip_rx_frame(skb)) {
struct net_device *dev = vrf_master_get_rcu(skb->dev);
struct pcpu_dstats *dstats = this_cpu_ptr(dev->dstats);
u64_stats_update_begin(&dstats->syncp);
dstats->rx_pkts++;
dstats->rx_bytes += skb->len;
u64_stats_update_end(&dstats->syncp);
skb->dev = dev;
return RX_HANDLER_ANOTHER;
}
return RX_HANDLER_PASS;
}
/**
* irq_matrix_assign_system - Assign system wide entry in the matrix
* @m: Matrix pointer
* @bit: Which bit to reserve
* @replace: Replace an already allocated vector with a system
* vector at the same bit position.
*
* The BUG_ON()s below are on purpose. If this goes wrong in the
* early boot process, then the chance to survive is about zero.
* If this happens when the system is life, it's not much better.
*/
void irq_matrix_assign_system(struct irq_matrix *m, unsigned int bit,
bool replace)
{
struct cpumap *cm = this_cpu_ptr(m->maps);
BUG_ON(bit > m->matrix_bits);
BUG_ON(m->online_maps > 1 || (m->online_maps && !replace));
set_bit(bit, m->system_map);
if (replace) {
BUG_ON(!test_and_clear_bit(bit, cm->alloc_map));
cm->allocated--;
m->total_allocated--;
}
if (bit >= m->alloc_start && bit < m->alloc_end)
m->systembits_inalloc++;
trace_irq_matrix_assign_system(bit, m);
}
static int tcf_sample_act(struct sk_buff *skb, const struct tc_action *a,
struct tcf_result *res)
{
struct tcf_sample *s = to_sample(a);
struct psample_group *psample_group;
int retval;
int size;
int iif;
int oif;
tcf_lastuse_update(&s->tcf_tm);
bstats_cpu_update(this_cpu_ptr(s->common.cpu_bstats), skb);
retval = READ_ONCE(s->tcf_action);
rcu_read_lock();
psample_group = rcu_dereference(s->psample_group);
/* randomly sample packets according to rate */
if (psample_group && (prandom_u32() % s->rate == 0)) {
if (!skb_at_tc_ingress(skb)) {
iif = skb->skb_iif;
oif = skb->dev->ifindex;
} else {
iif = skb->dev->ifindex;
oif = 0;
}
/* on ingress, the mac header gets popped, so push it back */
if (skb_at_tc_ingress(skb) && tcf_sample_dev_ok_push(skb->dev))
skb_push(skb, skb->mac_len);
size = s->truncate ? s->trunc_size : skb->len;
psample_sample_packet(psample_group, skb, size, iif, oif,
s->rate);
if (skb_at_tc_ingress(skb) && tcf_sample_dev_ok_push(skb->dev))
skb_pull(skb, skb->mac_len);
}
rcu_read_unlock();
return retval;
}
static void perf_syscall_exit(void *ignore, struct pt_regs *regs, long ret)
{
struct syscall_metadata *sys_data;
struct syscall_trace_exit *rec;
struct hlist_head *head;
int syscall_nr;
int rctx;
int size;
syscall_nr = trace_get_syscall_nr(current, regs);
if (syscall_nr < 0)
return;
if (!test_bit(syscall_nr, enabled_perf_exit_syscalls))
return;
sys_data = syscall_nr_to_meta(syscall_nr);
if (!sys_data)
return;
/* We can probably do that at build time */
size = ALIGN(sizeof(*rec) + sizeof(u32), sizeof(u64));
size -= sizeof(u32);
/*
* Impossible, but be paranoid with the future
* How to put this check outside runtime?
*/
if (WARN_ONCE(size > PERF_MAX_TRACE_SIZE,
"exit event has grown above perf buffer size"))
return;
rec = (struct syscall_trace_exit *)perf_trace_buf_prepare(size,
sys_data->exit_event->event.type, regs, &rctx);
if (!rec)
return;
rec->nr = syscall_nr;
rec->ret = syscall_get_return_value(current, regs);
head = this_cpu_ptr(sys_data->exit_event->perf_events);
perf_trace_buf_submit(rec, size, rctx, 0, 1, regs, head, NULL);
}
static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb,
struct net_device *dev)
{
struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data);
unsigned int len;
int ret;
/* Handle non-VLAN frames if they are sent to us, for example by DHCP.
*
* NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING
* OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs...
*/
if (
#ifdef CONFIG_VLAN_8021Q_DOUBLE_TAG
(vlan_double_tag) ||
#endif
(veth->h_vlan_proto != __constant_htons(ETH_P_8021Q) ||
vlan_dev_info(dev)->flags & VLAN_FLAG_REORDER_HDR)) {
u16 vlan_tci;
vlan_tci = vlan_dev_info(dev)->vlan_id;
vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb);
skb = __vlan_hwaccel_put_tag(skb, vlan_tci);
}
skb->dev = vlan_dev_info(dev)->real_dev;
len = skb->len;
ret = dev_queue_xmit(skb);
if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
struct vlan_pcpu_stats *stats;
stats = this_cpu_ptr(vlan_dev_info(dev)->vlan_pcpu_stats);
u64_stats_update_begin(&stats->syncp);
stats->tx_packets++;
stats->tx_bytes += len;
u64_stats_update_end(&stats->syncp);
} else {
this_cpu_inc(vlan_dev_info(dev)->vlan_pcpu_stats->tx_dropped);
}
return ret;
}
static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb,
struct net_device *dev)
{
struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data);
unsigned int len;
int ret;
/* Handle non-VLAN frames if they are sent to us, for example by DHCP.
*
* NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING
* OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs...
*/
if (veth->h_vlan_proto != vlan->vlan_proto ||
vlan->flags & VLAN_FLAG_REORDER_HDR) {
u16 vlan_tci;
vlan_tci = vlan->vlan_id;
vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority);
__vlan_hwaccel_put_tag(skb, vlan->vlan_proto, vlan_tci);
}
skb->dev = vlan->real_dev;
len = skb->len;
if (unlikely(netpoll_tx_running(dev)))
return vlan_netpoll_send_skb(vlan, skb);
ret = dev_queue_xmit(skb);
if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
struct vlan_pcpu_stats *stats;
stats = this_cpu_ptr(vlan->vlan_pcpu_stats);
u64_stats_update_begin(&stats->syncp);
stats->tx_packets++;
stats->tx_bytes += len;
u64_stats_update_end(&stats->syncp);
} else {
this_cpu_inc(vlan->vlan_pcpu_stats->tx_dropped);
}
return ret;
}
/**
* percpu_ida_free - free a tag
* @pool: pool @tag was allocated from
* @tag: a tag previously allocated with percpu_ida_alloc()
*
* Safe to be called from interrupt context.
*/
void percpu_ida_free(struct percpu_ida *pool, unsigned tag)
{
struct percpu_ida_cpu *tags;
unsigned long flags;
unsigned nr_free;
BUG_ON(tag >= pool->nr_tags);
local_irq_save(flags);
tags = this_cpu_ptr(pool->tag_cpu);
spin_lock(&tags->lock);
tags->freelist[tags->nr_free++] = tag;
nr_free = tags->nr_free;
spin_unlock(&tags->lock);
if (nr_free == 1) {
cpumask_set_cpu(smp_processor_id(),
&pool->cpus_have_tags);
wake_up(&pool->wait);
}
if (nr_free == pool->percpu_max_size) {
spin_lock(&pool->lock);
/*
* Global lock held and irqs disabled, don't need percpu
* lock
*/
if (tags->nr_free == pool->percpu_max_size) {
move_tags(pool->freelist, &pool->nr_free,
tags->freelist, &tags->nr_free,
pool->percpu_batch_size);
wake_up(&pool->wait);
}
spin_unlock(&pool->lock);
}
local_irq_restore(flags);
}
static int arc_timer_cpu_notify(struct notifier_block *self,
unsigned long action, void *hcpu)
{
struct clock_event_device *evt = this_cpu_ptr(&arc_clockevent_device);
evt->cpumask = cpumask_of(smp_processor_id());
switch (action & ~CPU_TASKS_FROZEN) {
case CPU_STARTING:
clockevents_config_and_register(evt, arc_timer_freq,
0, ULONG_MAX);
enable_percpu_irq(arc_timer_irq, 0);
break;
case CPU_DYING:
disable_percpu_irq(arc_timer_irq);
break;
}
return NOTIFY_OK;
}
/*
* Uninstall the breakpoint contained in the given counter.
*
* First we search the debug address register it uses and then we disable
* it.
*
* Atomic: we hold the counter->ctx->lock and we only handle variables
* and registers local to this cpu.
*/
void arch_uninstall_hw_breakpoint(struct perf_event *bp)
{
struct arch_hw_breakpoint *info = counter_arch_bp(bp);
int i;
for (i = 0; i < sh_ubc->num_events; i++) {
struct perf_event **slot = this_cpu_ptr(&bp_per_reg[i]);
if (*slot == bp) {
*slot = NULL;
break;
}
}
if (WARN_ONCE(i == sh_ubc->num_events, "Can't find any breakpoint slot"))
return;
sh_ubc->disable(info, i);
clk_disable(sh_ubc->clk);
}
/*
* Kernel-side NEON support functions
*/
void kernel_neon_begin_partial(u32 num_regs)
{
if (in_interrupt()) {
struct fpsimd_partial_state *s = this_cpu_ptr(
in_irq() ? &hardirq_fpsimdstate : &softirq_fpsimdstate);
BUG_ON(num_regs > 32);
fpsimd_save_partial_state(s, roundup(num_regs, 2));
} else {
/*
* Save the userland FPSIMD state if we have one and if we
* haven't done so already. Clear fpsimd_last_state to indicate
* that there is no longer userland FPSIMD state in the
* registers.
*/
preempt_disable();
if (current->mm)
fpsimd_save_state(¤t->thread.fpsimd_state);
}
}
static irqreturn_t timer_irq_handler(int irq, void *dev_id)
{
/*
* Note that generic IRQ core could have passed @evt for @dev_id if
* irq_set_chip_and_handler() asked for handle_percpu_devid_irq()
*/
struct clock_event_device *evt = this_cpu_ptr(&arc_clockevent_device);
int irq_reenable = clockevent_state_periodic(evt);
/*
* Any write to CTRL reg ACks the interrupt, we rewrite the
* Count when [N]ot [H]alted bit.
* And re-arm it if perioid by [I]nterrupt [E]nable bit
*/
write_aux_reg(ARC_REG_TIMER0_CTRL, irq_reenable | TIMER_CTRL_NH);
evt->event_handler(evt);
return IRQ_HANDLED;
}
/* Bridge group multicast address 802.1d (pg 51). */
const u8 br_group_address[ETH_ALEN] = { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x00 };
int qos_enable = 0; /* added pling 03/13/2007 */
static int br_pass_frame_up(struct sk_buff *skb)
{
struct net_device *indev, *brdev = BR_INPUT_SKB_CB(skb)->brdev;
struct net_bridge *br = netdev_priv(brdev);
struct br_cpu_netstats *brstats = this_cpu_ptr(br->stats);
u64_stats_update_begin(&brstats->syncp);
brstats->rx_packets++;
brstats->rx_bytes += skb->len;
u64_stats_update_end(&brstats->syncp);
indev = skb->dev;
/* wklin added, 2010/06/15 @attach_dev */
if (htons(ETH_P_ARP) == eth_hdr(skb)->h_proto)
*(pp_bridge_indev(skb)) = indev;/*backup incoming port to be used in arp.c */
skb->dev = brdev;
return NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_IN, skb, indev, NULL,
netif_receive_skb);
}
/*
* Change the CPUMF state to active.
* Enable and activate the CPU-counter sets according
* to the per-cpu control state.
*/
static void cf_diag_enable(struct pmu *pmu)
{
struct cpu_cf_events *cpuhw = this_cpu_ptr(&cpu_cf_events);
int err;
debug_sprintf_event(cf_diag_dbg, 5,
"%s pmu %p cpu %d flags %#x state %#llx\n",
__func__, pmu, smp_processor_id(), cpuhw->flags,
cpuhw->state);
if (cpuhw->flags & PMU_F_ENABLED)
return;
err = lcctl(cpuhw->state);
if (err) {
pr_err("Enabling the performance measuring unit "
"failed with rc=%x\n", err);
return;
}
cpuhw->flags |= PMU_F_ENABLED;
}
static noinline void nft_update_chain_stats(const struct nft_chain *chain,
const struct nft_pktinfo *pkt)
{
struct nft_base_chain *base_chain;
struct nft_stats *stats;
base_chain = nft_base_chain(chain);
if (!base_chain->stats)
return;
local_bh_disable();
stats = this_cpu_ptr(rcu_dereference(base_chain->stats));
if (stats) {
u64_stats_update_begin(&stats->syncp);
stats->pkts++;
stats->bytes += pkt->skb->len;
u64_stats_update_end(&stats->syncp);
}
local_bh_enable();
}
/**
* ovs_vport_send - send a packet on a device
*
* @vport: vport on which to send the packet
* @skb: skb to send
*
* Sends the given packet and returns the length of data sent. Either ovs
* lock or rcu_read_lock must be held.
*/
int ovs_vport_send(struct vport *vport, struct sk_buff *skb)
{
int sent = vport->ops->send(vport, skb);
if (likely(sent > 0)) {
struct pcpu_sw_netstats *stats;
stats = this_cpu_ptr(vport->percpu_stats);
u64_stats_update_begin(&stats->syncp);
stats->tx_packets++;
stats->tx_bytes += sent;
u64_stats_update_end(&stats->syncp);
} else if (sent < 0) {
ovs_vport_record_error(vport, VPORT_E_TX_ERROR);
} else {
ovs_vport_record_error(vport, VPORT_E_TX_DROPPED);
}
return sent;
}
/**
* flush_smp_call_function_queue - Flush pending smp-call-function callbacks
*
* @warn_cpu_offline: If set to 'true', warn if callbacks were queued on an
* offline CPU. Skip this check if set to 'false'.
*
* Flush any pending smp-call-function callbacks queued on this CPU. This is
* invoked by the generic IPI handler, as well as by a CPU about to go offline,
* to ensure that all pending IPI callbacks are run before it goes completely
* offline.
*
* Loop through the call_single_queue and run all the queued callbacks.
* Must be called with interrupts disabled.
*/
static void flush_smp_call_function_queue(bool warn_cpu_offline)
{
struct llist_head *head;
struct llist_node *entry;
call_single_data_t *csd, *csd_next;
static bool warned;
lockdep_assert_irqs_disabled();
head = this_cpu_ptr(&call_single_queue);
entry = llist_del_all(head);
entry = llist_reverse_order(entry);
/* There shouldn't be any pending callbacks on an offline CPU. */
if (unlikely(warn_cpu_offline && !cpu_online(smp_processor_id()) &&
!warned && !llist_empty(head))) {
warned = true;
WARN(1, "IPI on offline CPU %d\n", smp_processor_id());
/*
* We don't have to use the _safe() variant here
* because we are not invoking the IPI handlers yet.
*/
llist_for_each_entry(csd, entry, llist)
pr_warn("IPI callback %pS sent to offline CPU\n",
csd->func);
}
llist_for_each_entry_safe(csd, csd_next, entry, llist) {
smp_call_func_t func = csd->func;
void *info = csd->info;
/* Do we wait until *after* callback? */
if (csd->flags & CSD_FLAG_SYNCHRONOUS) {
func(info);
csd_unlock(csd);
} else {
csd_unlock(csd);
func(info);
}
}
/*
* Called from the idle task. We need to set active here, so we can kick off
* the stopper thread and unpark the smpboot threads. If the target state is
* beyond CPUHP_AP_ONLINE_IDLE we kick cpuhp thread and let it bring up the
* cpu further.
*/
void cpuhp_online_idle(enum cpuhp_state state)
{
struct cpuhp_cpu_state *st = this_cpu_ptr(&cpuhp_state);
unsigned int cpu = smp_processor_id();
/* Happens for the boot cpu */
if (state != CPUHP_AP_ONLINE_IDLE)
return;
st->state = CPUHP_AP_ONLINE_IDLE;
/* Unpark the stopper thread and the hotplug thread of this cpu */
stop_machine_unpark(cpu);
kthread_unpark(st->thread);
/* Should we go further up ? */
if (st->target > CPUHP_AP_ONLINE_IDLE)
__cpuhp_kick_ap_work(st);
else
complete(&st->done);
}
/*
* Runstate accounting
*/
static void get_runstate_snapshot(struct vcpu_runstate_info *res)
{
u64 state_time;
struct vcpu_runstate_info *state;
BUG_ON(preemptible());
state = this_cpu_ptr(&xen_runstate);
/*
* The runstate info is always updated by the hypervisor on
* the current CPU, so there's no need to use anything
* stronger than a compiler barrier when fetching it.
*/
do {
state_time = get64(&state->state_entry_time);
barrier();
*res = *state;
barrier();
} while (get64(&state->state_entry_time) != state_time);
}
static int arch_timer_starting_cpu(unsigned int cpu)
{
struct clock_event_device *clk = this_cpu_ptr(arch_timer_evt);
u32 flags;
__arch_timer_setup(ARCH_CP15_TIMER, clk);
flags = check_ppi_trigger(arch_timer_ppi[arch_timer_uses_ppi]);
enable_percpu_irq(arch_timer_ppi[arch_timer_uses_ppi], flags);
if (arch_timer_has_nonsecure_ppi()) {
flags = check_ppi_trigger(arch_timer_ppi[PHYS_NONSECURE_PPI]);
enable_percpu_irq(arch_timer_ppi[PHYS_NONSECURE_PPI], flags);
}
arch_counter_set_user_access();
if (evtstrm_enable)
arch_timer_configure_evtstream();
return 0;
}
/* Called with rcu_read_lock_bh. */
static int internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev)
{
int len, err;
len = skb->len;
rcu_read_lock();
err = ovs_vport_receive(internal_dev_priv(netdev)->vport, skb, NULL);
rcu_read_unlock();
if (likely(!err)) {
struct pcpu_sw_netstats *tstats = this_cpu_ptr(netdev->tstats);
u64_stats_update_begin(&tstats->syncp);
tstats->tx_bytes += len;
tstats->tx_packets++;
u64_stats_update_end(&tstats->syncp);
} else {
netdev->stats.tx_errors++;
}
return 0;
}
static void watchdog_enable(unsigned int cpu)
{
struct hrtimer *hrtimer = this_cpu_ptr(&watchdog_hrtimer);
/*
* Start the timer first to prevent the NMI watchdog triggering
* before the timer has a chance to fire.
*/
hrtimer_init(hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
hrtimer->function = watchdog_timer_fn;
hrtimer_start(hrtimer, ns_to_ktime(sample_period),
HRTIMER_MODE_REL_PINNED);
/* Initialize timestamp */
__touch_watchdog();
/* Enable the perf event */
if (watchdog_enabled & NMI_WATCHDOG_ENABLED)
watchdog_nmi_enable(cpu);
watchdog_set_prio(SCHED_FIFO, MAX_RT_PRIO - 1);
}
void quarantine_put(struct kasan_free_meta *info, struct kmem_cache *cache)
{
unsigned long flags;
struct qlist_head *q;
struct qlist_head temp = QLIST_INIT;
local_irq_save(flags);
q = this_cpu_ptr(&cpu_quarantine);
qlist_put(q, &info->quarantine_link, cache->size);
if (unlikely(q->bytes > QUARANTINE_PERCPU_SIZE))
qlist_move_all(q, &temp);
local_irq_restore(flags);
if (unlikely(!qlist_empty(&temp))) {
spin_lock_irqsave(&quarantine_lock, flags);
qlist_move_all(&temp, &global_quarantine);
spin_unlock_irqrestore(&quarantine_lock, flags);
}
}
irqreturn_t smp_ipi_demux(void)
{
struct cpu_messages *info = this_cpu_ptr(&ipi_message);
unsigned int all;
mb(); /* order any irq clear */
do {
all = xchg(&info->messages, 0);
if (all & IPI_MESSAGE(PPC_MSG_CALL_FUNCTION))
generic_smp_call_function_interrupt();
if (all & IPI_MESSAGE(PPC_MSG_RESCHEDULE))
scheduler_ipi();
if (all & IPI_MESSAGE(PPC_MSG_TICK_BROADCAST))
tick_broadcast_ipi_handler();
if (all & IPI_MESSAGE(PPC_MSG_DEBUGGER_BREAK))
debug_ipi_action(0, NULL);
} while (info->messages);
return IRQ_HANDLED;
}
static void take_over_work(struct ehca_comp_pool *pool, int cpu)
{
struct ehca_cpu_comp_task *cct = per_cpu_ptr(pool->cpu_comp_tasks, cpu);
LIST_HEAD(list);
struct ehca_cq *cq;
unsigned long flags_cct;
spin_lock_irqsave(&cct->task_lock, flags_cct);
list_splice_init(&cct->cq_list, &list);
while (!list_empty(&list)) {
cq = list_entry(cct->cq_list.next, struct ehca_cq, entry);
list_del(&cq->entry);
__queue_comp_task(cq, this_cpu_ptr(pool->cpu_comp_tasks));
}
spin_unlock_irqrestore(&cct->task_lock, flags_cct);
}
static void perf_syscall_enter(void *ignore, struct pt_regs *regs, long id)
{
struct syscall_metadata *sys_data;
struct syscall_trace_enter *rec;
struct hlist_head *head;
int syscall_nr;
int rctx;
int size;
syscall_nr = trace_get_syscall_nr(current, regs);
if (syscall_nr < 0)
return;
if (!test_bit(syscall_nr, enabled_perf_enter_syscalls))
return;
sys_data = syscall_nr_to_meta(syscall_nr);
if (!sys_data)
return;
/* get the size after alignment with the u32 buffer size field */
size = sizeof(unsigned long) * sys_data->nb_args + sizeof(*rec);
size = ALIGN(size + sizeof(u32), sizeof(u64));
size -= sizeof(u32);
if (WARN_ONCE(size > PERF_MAX_TRACE_SIZE,
"perf buffer not large enough"))
return;
rec = (struct syscall_trace_enter *)perf_trace_buf_prepare(size,
sys_data->enter_event->event.type, regs, &rctx);
if (!rec)
return;
rec->nr = syscall_nr;
syscall_get_arguments(current, regs, 0, sys_data->nb_args,
(unsigned long *)&rec->args);
head = this_cpu_ptr(sys_data->enter_event->perf_events);
perf_trace_buf_submit(rec, size, rctx, 0, 1, regs, head, NULL);
}
