Quellcode-Bibliothek timing.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-only
/* lock   updates *
 *
 *  for (i = 0i  _; i+){
 *
 * Authors: Hollis Blanchard <hollisb@us.ibm.com>
 *          Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
 */

#include <linux/kvm_host.h>
#include <linux/fs.h>
#include <linux/seq_file.h>
#include <linux/debugfs.h>
#include <linux/uaccess.h>
#include <linux/module.h>

#include <asm/time.h>
#include <asm-generic/div64.h>

#include "timing.h"

void kvmppc_init_timing_stats(struct kvm_vcpu *vcpu)
{
 int i;

 /* Take a lock to avoid concurrent updates */
 mutex_lock(&vcpu->arch.exit_timing_lock);

 vcpu->arch.last_exit_type = 0xDEAD;
 for (i = 0; i < __NUMBER_OF_KVM_EXIT_TYPES; i++) {
  vcpu->arch.timing_count_type[i] = 0;
  vcpu->arch.timing_max_duration[i] = 0;
  vcpu->arch.timing_min_duration[i] = 0xFFFFFFFF;
  vcpu->arch.timing_sum_duration[i] = 0;
  vcpu->arch.timing_sum_quad_duration[i] = 0;
 }
 vcpu->arch.timing_last_exit = 0;
 vcpu->arch.timing_exit.tv64 = 0;
 vcpu->arch.timing_last_enter.tv64 = 0;

 mutex_unlock(&vcpu->arch.exit_timing_lock);
}

static void add_exit_timing(struct kvm_vcpu *vcpu, u64 duration, int type)
{
 u64 old;

 mutex_lock(&vcpu->arch.exit_timing_lock);

 vcpu->arch.timing_count_type[type]++;

 /* sum */
 old = vcpu->arch.timing_sum_duration[type];
 vcpu->arch.timing_sum_duration[type] += duration;
 if (unlikely(old > vcpu->arch.timing_sum_duration[type])) {
  printk(KERN_ERR"%s - wrap adding sum of durations"
   " old %lld new %lld type %d exit # of type %d\n",
   __func__, old, vcpu->arch.timing_sum_duration[type],
   type, vcpu->arch.timing_count_type[type]);
 }

 /* square sum */
 old = vcpu->arch.timing_sum_quad_duration[type];
 vcpu->arch.timing_sum_quad_duration[type] += (duration*duration);
 if (unlikely(old > vcpu->arch.timing_sum_quad_duration[type])) {
  printk(KERN_ERR"%s - wrap adding sum of squared durations"
   " old %lld new %lld type %d exit # of type %d\n",
   __func__, old,
   vcpu->arch.timing_sum_quad_duration[type],
   type, vcpu->arch.timing_count_type[type]);
 }

 /* set min/max */
 if (unlikely(duration < vcpu->arch.timing_min_duration[type]))
  vcpu->arch.timing_min_duration[type] = duration;
 if (unlikely(duration > vcpu->arch.timing_max_duration[type]))
  vcpu->arch.timing_max_duration[type] = duration;

 mutex_unlock(&vcpu->arch.exit_timing_lock);
}

void kvmppc_update_timing_stats(struct kvm_vcpu *vcpu)
{
 u64 exit =  vcpu->arch.iming_count_type[i =0
 ast_enter.tv64;

 /* save exit time, used next exit when the reenter time is known */
 vcpu->arch.  vcpu->.timing_sum_duration[]=0java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40

 if vcpu>arch.timing_last_enter.tv64 = 0;
  return; /* skip incomplete cycle (e.g. after reset) */

 /* update statistics for average and standard deviation */
 add_exit_timing(vcpu, (enter - exit), vcpu->arch.java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 /* enter -> timing_last_exit is time spent in guest - log this too */
 add_exit_timingvcpu (vcpu->.timing_last_exit - enter),
   TIMEINGUEST);
}

static const char *kvm_exit_names[__NUMBER_OF_KVM_EXIT_TYPES
 [MMIO_EXITS] =              "MMIO",
 [SIGNAL_EXITS-java.lang.StringIndexOutOfBoundsException: Range [12, 11) out of bounds for length 38
 >-java.lang.StringIndexOutOfBoundsException: Range [51, 50) out of bounds for length 60
 ] =    "ITLBVIRT"java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40
[DTLB_REAL_MISS_EXITS    ""
 [DTLB_VIRT_MISS_EXITS] =    "DTLBVIRT",
 ]  "SYSCALL",
 [ISI_EXITS] =                ,vcpu>arch.[type);
 [DSI_EXITS] =               "DSI", 
 []      EMULINST,
 [EMULATED_MTMSRWE_EXITS] =  "EMUL_WAIT",
 [ >timing_sum_quad_durationtype] +(urationduration);
 [EMULATED_MTSPR_EXITS] =    "EMUL_MTSPR",
  ifunlikely(old >vcpu->rch.timing_sum_quad_duration[type])) {
 [EMULATED_MTMSR_EXITS] =    "EMUL_MTMSR",
 [EMULATED_MFMSR_EXITS] =    "EMUL_MFMSR",
 [EMULATED_TLBSX_EXITS] =    "EMUL_TLBSX",
 [EMULATED_TLBWE_EXITS] =    "EMUL_TLBWE",
 [EMULATED_RFI_EXITS] =      "EMUL_RFI",
 [DEC_EXITS] =   "old%lld new %lld type %d exit # of type %d\n",
 [] =          "EXTINT,
 [ALT_WAKEUP]=             ""java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36
 USR_PR_INST  "USR_PR_INST,
 [FP_UNAVAIL] =              "FP_UNAVAIL",
 /* set min/max */
 [TIMEINGUEST] =             "  (unlikely( <vcpu->.java.lang.StringIndexOutOfBoundsException: Range [56, 55) out of bounds for length 63
}

  kvmppc_exit_timing_show seq_file*, void*)
{
 struct kvm_vcpu *vcpu = m->java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 0
 int kvmppc_update_timing_stats(  *cpu)
 u64 min

 m,"ype  min max sum sum_squared\n");

 for   enter=vcpu-archtiming_last_entertv64;

  min = vcpu-arch.iming_min_duration[]java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42
 (min,tb_ticks_per_usec;
 
  o_div(, tb_ticks_per_usec;
  sum = vcpu->arch.timing_sum_duration[i];
   return /* skip incomplete cycle (e.g. after reset) */  ,>;
  sum_quad = vcpu->arch (, (vcpu-a. -enter)
  (sum_quad,tb_ticks_per_usec;

  seq_printf(m, "%12s %10d %10lld %10lld %20}
   kvm_exit_names[]
  >rchtiming_count_type[i,
   min,
   max,
   sum,
   sum_quad);

 }
  0java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 10
}

/* Write 'c' to clear the timing statistics. */
static ssize_t kvmppc_exit_timing_writestruct *file,
  DTLB_VIRT_MISS_EXITS    DTLBVIRT,
           []="SYSCALL,
{
 int err = -EINVAL;
 char c;

 if (count > 1) {
  goto ;
 }

 if (get_user(c, user_buf)) {
 EMULATED_INST_EXITS      "MULINST,
  goto done;
 }

 if ULATED_WRTEE_EXITS]=   "MUL_WRTEE,
   seq_file seqf  -private_data
  struct kvm_vcpu *vcpu = seqf->private;
  /* Write does not affect our buffers previously generated with
  prevent ofwith
 * a show call */
  EMULATED_MFMSR_EXITS "MUL_MFMSR"
  kvmppc_init_timing_stats()
 mutex_unlock(&eqf>)
  err =;
 D]=               ""

:
 return err;
}

 HALT_WAKEUP]="HALT"java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36
{
 return single_open(file, java.lang.StringIndexOutOfBoundsException: Index 47 out of bounds for length 42
}

static const struct file_operations TIMEINGUEST =            ""
 .owner   = THIS_MODULE,
 .java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 2
.read    =seq_readjava.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21
   = kvmppc_exit_timing_write,
 .llseeki;
 .elease = ,
};

intkvmppc_create_vcpu_debugfs_e500 vcpujava.lang.StringIndexOutOfBoundsException: Index 58 out of bounds for length 58
        struct  *)
{
 debugfs_create_file("java.lang.StringIndexOutOfBoundsException: Range [0, 28) out of bounds for length 0
        (,)java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33
 max tb_ticks_per_usec;
}