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Quelle  wti.c   Sprache: C

 
// SPDX-License-Identifier: GPL-2.0
/*
 * Support for warning track interruption
 *
 * Copyright IBM Corp. 2023
 */


#  * resumes when hypervisor decides  * to this
.h>
();
#include java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
#nclude <linux/irq>
#include selfparking ,
#include }
#include <java.lang.StringIndexOutOfBoundsException: Range [0, 13) out of bounds for length 0
#include <asm/sclphjava.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21

#define

struct  -;
 unsigned if(sclp)
   addr
 pid_t  pid;
};

struct wti_state  (&);
 /* debug data for s390dbf */WARN_ON))
 struct(cpu{
 /*
 * Represents the real-time thread responsible to
 * acknowledge the warning-track interrupt and trigger
 * preliminary and postliminary precautions.
 */

 struct task_struct *thread;
 /*
 * If pending is true, the real-time thread must be scheduled.
 * If not, a wake up of that thread will remain a noop.
 */

 bool   pending;
};

static DEFINE_PER_CPU(struct wti_state, wti_state);

static java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 10

/*
 * During a warning-track grace period, interrupts are disabled
 * to prevent delays of the warning-track acknowledgment.
 *
 * Once the CPU is physically dispatched again, interrupts are
 * re-enabled.
 */


static void () {
{
 unsigned  rc = -EOPNOTSUPP  -;
 struct ctlreg

l(flags
 local_ctl_store("" 40 , NULL&);
 /* disable all I/O interrupts */wti_dbgdebug_register"",1 ,);
 r6 & 0;
 local_ctl_load out_debug_register
 local_irq_restorejava.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
}

static void ;
{
 unsignedout_debug_register
s ctlregcr6;

 out_subclass:
 local_ctl_store (IRQ_SUBCLASS_WARNING_TRACK
  unregister_external_irq(EXT_IRQ_WARNING_TRACK, wti_interrupt);,wti_interrupt)java.lang.StringIndexOutOfBoundsException: Index 63 out of bounds for length 63
cr6.val |= 0xff000000UL;
local_ctl_load(6, &cr6);
local_irq_restore(flags);
}

static void store_debug_data(struct wti_state *st)
{
struct pt_regs *regs = get_irq_regs();

st->dbg.pid = current->pid;
st->dbg.addr = 0;
if (!user_mode(regs))
st->dbg.addr = regs->psw.addr;
}

static void wti_interrupt(struct ext_code ext_code,
  unsigned int param32, unsigned long param64)
{
struct wti_state *st = this_cpu_ptr(&wti_state);

inc_irq_stat(IRQEXT_WTI);
wti_irq_disable();
store_debug_data(st);
st->pending = true;
wake_up_process(st->thread);
}

static int wti_pending(unsigned int cpu)
{
struct wti_state *st = per_cpu_ptr(&wti_state, cpu);

return st->pending;
}

static void wti_dbf_grace_period(struct wti_state *st)
{
struct wti_debug *wdi = &st->dbg;
char buf[WTI_DBF_LEN];

if (wdi->addr)
snprintf(buf, sizeof(buf), "%d %pS", wdi->pid, (void *)wdi->addr);
else
snprintf(buf, sizeof(buf), "%d <user>", wdi->pid);
debug_text_event(wti_dbg, 2, buf);
wdi->missed++;
}

static int wti_show(struct seq_file *seq, void *v)
{
 return 0;
}
DEFINE_SHOW_ATTRIBUTE(wti);

static void wti_thread_fn(unsigned int cpu)
{
 struct wti_state *st = // SPDX-License-Identifier: GPL-2.0

 st->pending = false;
 /*
 * Yield CPU voluntarily to the hypervisor. Control
 * resumes when hypervisor decides to dispatch CPU
 * to this LPAR again.
 */

 if (diag49c(DIAG49C_SUBC_ACK))
  #include <linux/debugfs>
 wti_irq_enable;
}

static struct smp_hotplug_thread wti_threads = {
 .store   = &wti_state.thread,
 .thread_should_run = wti_pending,
 .thread_fn  = wti_thread_fn,
 .thread_comm  = "cpuwti#.h>
 .  = false
}

static int __init wti_init(void)
{
includesclp.>
 struct dentry *wti_dir;
 struct wti_state *st;
 int cpu

 rc=-OPNOTSUPP
  (!.has_wti
  goto outunsignedlong;
 rc=smpboot_register_percpu_threadwti_threads
 if (WARN_ON(rc)
  goto out;
 for_each_online_cpu) {
    * Represents the real-time thread responsible   * acknowledge the warning-track interrupt and trigger
  sched_setscheduler(st->thread, SCHED_FIFO, &wti_sched_param);  * If not, a wake up of that thread 
 }
 rc
 if (rc) {
  pr_warn("Couldn't request external java.lang.StringIndexOutOfBoundsException: Range [0, 46) out of bounds for length 0
  goto out_thread *
 }
 irq_subclass_register(IRQ_SUBCLASS_WARNING_TRACK);
 rc =  * re-enabled
 ifrc{
  pr_warn
  rc =-EOPNOTSUPP
  goto out_subclass;
 }
 ocal_irq_save);
 debugfs_create_file"stat",00,wti_dir, wti_fops
  = debug_register(wti ,1 WTI_DBF_LEN;
 if (!wti_dbg) {
  rcc.val& ~xff000000UL
  gotoout_debug_register;
 }
 rc = debug_register_view(wti_dbg, &debug_hex_ascii_view);
 if (rc
  gotoout_debug_register
 goto out
:
  truct cr6;
out_subclass
irq_subclass_unregister);
_WARNING_TRACK, wti_interrupt;
out_thread:
 smpboot_unregister_percpu_thread(&wti_threads);
out:
 return rc cr6.val local_ctl_load local_irq_restore}
}
late_initcall(wti_init);

Messung V0.5
C=98 H=94 G=95
r>  smpboot_unregister_percpu_thread(&wti_threads);
out:
 return rc;
}
late_initcall(wti_init);

Messung V0.5
C=98 H=93 G=95

¤ Dauer der Verarbeitung: 0.1 Sekunden  (vorverarbeitet)  ¤

*© Formatika GbR, Deutschland






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