Differential D32559 Diff 97148 sys/amd64/vmm/io/vlapic.c

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sys/amd64/vmm/io/vlapic.c

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/*		/*
* APIC timer frequency:		* APIC timer frequency:
* - arbitrary but chosen to be in the ballpark of contemporary hardware.		* - arbitrary but chosen to be in the ballpark of contemporary hardware.
* - power-of-two to avoid loss of precision when converted to a bintime.		* - power-of-two to avoid loss of precision when converted to a bintime.
*/		*/
#define VLAPIC_BUS_FREQ (128 * 1024 * 1024)		#define VLAPIC_BUS_FREQ (128 * 1024 * 1024)

static void vlapic_set_error(struct vlapic *, uint32_t, bool);		static void vlapic_set_error(struct vlapic *, uint32_t, bool);
		static void vlapic_callout_handler(void *arg);

static __inline uint32_t		static __inline uint32_t
vlapic_get_id(struct vlapic *vlapic)		vlapic_get_id(struct vlapic *vlapic)
{		{

if (x2apic(vlapic))		if (x2apic(vlapic))
return (vlapic->vcpuid);		return (vlapic->vcpuid);
else		else
▲ Show 20 Lines • Show All 612 Lines • ▼ Show 20 Lines	case APIC_LVT_CMCI:
break;		break;
default:		default:
return (EINVAL);		return (EINVAL);
}		}
return (0);		return (0);
}		}

static void		static void
		vlapic_callout_reset(struct vlapic *vlapic, sbintime_t t)
		{
		callout_reset_sbt_curcpu(&vlapic->callout, t, 0,
		vlapic_callout_handler, vlapic, 0);
		}

		static void
vlapic_callout_handler(void *arg)		vlapic_callout_handler(void *arg)
{		{
struct vlapic *vlapic;		struct vlapic *vlapic;
struct bintime bt, btnow;		struct bintime bt, btnow;
sbintime_t rem_sbt;		sbintime_t rem_sbt;

vlapic = arg;		vlapic = arg;

Show All 38 Lines	if (bintime_cmp(&bt, &vlapic->timer_period_bt, <)) {
vlapic->timer_fire_bt = btnow;		vlapic->timer_fire_bt = btnow;
VLAPIC_CTR2(vlapic, "vlapic timer lagging by %lu "		VLAPIC_CTR2(vlapic, "vlapic timer lagging by %lu "
"usecs, period is %lu usecs - resetting time base",		"usecs, period is %lu usecs - resetting time base",
bttosbt(bt) / SBT_1US,		bttosbt(bt) / SBT_1US,
bttosbt(vlapic->timer_period_bt) / SBT_1US);		bttosbt(vlapic->timer_period_bt) / SBT_1US);
}		}

bintime_add(&vlapic->timer_fire_bt, &vlapic->timer_period_bt);		bintime_add(&vlapic->timer_fire_bt, &vlapic->timer_period_bt);
callout_reset_sbt(&vlapic->callout, rem_sbt, 0,		vlapic_callout_reset(vlapic, rem_sbt);
vlapic_callout_handler, vlapic, 0);
}		}
done:		done:
VLAPIC_TIMER_UNLOCK(vlapic);		VLAPIC_TIMER_UNLOCK(vlapic);
}		}

void		void
vlapic_icrtmr_write_handler(struct vlapic *vlapic)		vlapic_icrtmr_write_handler(struct vlapic *vlapic)
{		{
Show All 9 Lines	vlapic_icrtmr_write_handler(struct vlapic *vlapic)
vlapic->timer_period_bt = vlapic->timer_freq_bt;		vlapic->timer_period_bt = vlapic->timer_freq_bt;
bintime_mul(&vlapic->timer_period_bt, icr_timer);		bintime_mul(&vlapic->timer_period_bt, icr_timer);

if (icr_timer != 0) {		if (icr_timer != 0) {
binuptime(&vlapic->timer_fire_bt);		binuptime(&vlapic->timer_fire_bt);
bintime_add(&vlapic->timer_fire_bt, &vlapic->timer_period_bt);		bintime_add(&vlapic->timer_fire_bt, &vlapic->timer_period_bt);

sbt = bttosbt(vlapic->timer_period_bt);		sbt = bttosbt(vlapic->timer_period_bt);
callout_reset_sbt(&vlapic->callout, sbt, 0,		vlapic_callout_reset(vlapic, sbt);
vlapic_callout_handler, vlapic, 0);
} else		} else
callout_stop(&vlapic->callout);		callout_stop(&vlapic->callout);

VLAPIC_TIMER_UNLOCK(vlapic);		VLAPIC_TIMER_UNLOCK(vlapic);
}		}

/*		/*
* This function populates 'dmask' with the set of vcpus that match the		* This function populates 'dmask' with the set of vcpus that match the
▲ Show 20 Lines • Show All 857 Lines • ▼ Show 20 Lines	vlapic_reset_callout(struct vlapic *vlapic, uint32_t ccr)
bt = vlapic->timer_freq_bt;		bt = vlapic->timer_freq_bt;
bintime_mul(&bt, ccr);		bintime_mul(&bt, ccr);

if (ccr != 0) {		if (ccr != 0) {
binuptime(&vlapic->timer_fire_bt);		binuptime(&vlapic->timer_fire_bt);
bintime_add(&vlapic->timer_fire_bt, &bt);		bintime_add(&vlapic->timer_fire_bt, &bt);

sbt = bttosbt(bt);		sbt = bttosbt(bt);
callout_reset_sbt(&vlapic->callout, sbt, 0,		vlapic_callout_reset(vlapic, sbt);
vlapic_callout_handler, vlapic, 0);
} else {		} else {
/* even if the CCR was 0, periodic timers should be reset */		/* even if the CCR was 0, periodic timers should be reset */
if (vlapic_periodic_timer(vlapic)) {		if (vlapic_periodic_timer(vlapic)) {
binuptime(&vlapic->timer_fire_bt);		binuptime(&vlapic->timer_fire_bt);
bintime_add(&vlapic->timer_fire_bt,		bintime_add(&vlapic->timer_fire_bt,
&vlapic->timer_period_bt);		&vlapic->timer_period_bt);
sbt = bttosbt(vlapic->timer_period_bt);		sbt = bttosbt(vlapic->timer_period_bt);

callout_stop(&vlapic->callout);		callout_stop(&vlapic->callout);
callout_reset_sbt(&vlapic->callout, sbt, 0,		vlapic_callout_reset(vlapic, sbt);
vlapic_callout_handler, vlapic, 0);
}		}
}		}

VLAPIC_TIMER_UNLOCK(vlapic);		VLAPIC_TIMER_UNLOCK(vlapic);
}		}

int		int
vlapic_snapshot(struct vm vm, struct vm_snapshot_meta meta)		vlapic_snapshot(struct vm vm, struct vm_snapshot_meta meta)
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