Differential D19495 Diff 69728 sys/amd64/vmm/io/vlapic.c

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sys/amd64/vmm/io/vlapic.c

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* SUCH DAMAGE.		* SUCH DAMAGE.
*		*
* $FreeBSD$		* $FreeBSD$
*/		*/

#include <sys/cdefs.h>		#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");		__FBSDID("$FreeBSD$");

		#include "opt_bhyve_snapshot.h"

#include <sys/param.h>		#include <sys/param.h>
#include <sys/lock.h>		#include <sys/lock.h>
#include <sys/kernel.h>		#include <sys/kernel.h>
#include <sys/malloc.h>		#include <sys/malloc.h>
#include <sys/mutex.h>		#include <sys/mutex.h>
#include <sys/systm.h>		#include <sys/systm.h>
#include <sys/smp.h>		#include <sys/smp.h>

#include <x86/specialreg.h>		#include <x86/specialreg.h>
#include <x86/apicreg.h>		#include <x86/apicreg.h>

#include <machine/clock.h>		#include <machine/clock.h>
#include <machine/smp.h>		#include <machine/smp.h>

#include <machine/vmm.h>		#include <machine/vmm.h>
		#include <machine/vmm_snapshot.h>

#include "vmm_lapic.h"		#include "vmm_lapic.h"
#include "vmm_ktr.h"		#include "vmm_ktr.h"
#include "vmm_stat.h"		#include "vmm_stat.h"

#include "vlapic.h"		#include "vlapic.h"
#include "vlapic_priv.h"		#include "vlapic_priv.h"
#include "vioapic.h"		#include "vioapic.h"
▲ Show 20 Lines • Show All 1,587 Lines • ▼ Show 20 Lines	vlapic_set_tmr_level(struct vlapic *vlapic, uint32_t dest, bool phys,
vlapic_calcdest(vlapic->vm, &dmask, dest, phys, lowprio, false);		vlapic_calcdest(vlapic->vm, &dmask, dest, phys, lowprio, false);

if (!CPU_ISSET(vlapic->vcpuid, &dmask))		if (!CPU_ISSET(vlapic->vcpuid, &dmask))
return;		return;

VLAPIC_CTR1(vlapic, "vector %d set to level-triggered", vector);		VLAPIC_CTR1(vlapic, "vector %d set to level-triggered", vector);
vlapic_set_tmr(vlapic, vector, true);		vlapic_set_tmr(vlapic, vector, true);
}		}

		#ifdef BHYVE_SNAPSHOT
		static void
		vlapic_reset_callout(struct vlapic *vlapic, uint32_t ccr)
		{
		/* The implementation is similar to the one in the
		pmooney_pfmooney.comUnsubmitted Not Done Inline Actions Why was this accessor added? pmooney_pfmooney.com: Why was this accessor added?
		darius.mihaim_gmail.comUnsubmitted Done Inline Actions Removed it; was a leftover from an older implementation. darius.mihaim_gmail.com: Removed it; was a leftover from an older implementation.
		* `vlapic_icrtmr_write_handler` function
		*/
		sbintime_t sbt;
		struct bintime bt;

		VLAPIC_TIMER_LOCK(vlapic);

		bt = vlapic->timer_freq_bt;
		bintime_mul(&bt, ccr);

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

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

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

		VLAPIC_TIMER_UNLOCK(vlapic);
		}

		int
		vlapic_snapshot(struct vm vm, struct vm_snapshot_meta meta)
		{
		int i, ret;
		struct vlapic *vlapic;
		struct LAPIC *lapic;
		uint32_t ccr;

		KASSERT(vm != NULL, ("%s: arg was NULL", __func__));

		ret = 0;

		for (i = 0; i < VM_MAXCPU; i++) {
		vlapic = vm_lapic(vm, i);

		/* snapshot the page first; timer period depends on icr_timer */
		lapic = vlapic->apic_page;
		SNAPSHOT_BUF_OR_LEAVE(lapic, PAGE_SIZE, meta, ret, done);

		SNAPSHOT_VAR_OR_LEAVE(vlapic->esr_pending, meta, ret, done);

		SNAPSHOT_VAR_OR_LEAVE(vlapic->timer_freq_bt.sec,
		meta, ret, done);
		SNAPSHOT_VAR_OR_LEAVE(vlapic->timer_freq_bt.frac,
		meta, ret, done);

		/*
		* Timer period is equal to 'icr_timer' ticks at a frequency of
		* 'timer_freq_bt'.
		*/
		if (meta->op == VM_SNAPSHOT_RESTORE) {
		vlapic->timer_period_bt = vlapic->timer_freq_bt;
		bintime_mul(&vlapic->timer_period_bt, lapic->icr_timer);
		}

		SNAPSHOT_BUF_OR_LEAVE(vlapic->isrvec_stk,
		sizeof(vlapic->isrvec_stk),
		meta, ret, done);
		SNAPSHOT_VAR_OR_LEAVE(vlapic->isrvec_stk_top, meta, ret, done);
		SNAPSHOT_VAR_OR_LEAVE(vlapic->boot_state, meta, ret, done);

		SNAPSHOT_BUF_OR_LEAVE(vlapic->lvt_last,
		sizeof(vlapic->lvt_last),
		meta, ret, done);

		if (meta->op == VM_SNAPSHOT_SAVE)
		ccr = vlapic_get_ccr(vlapic);

		SNAPSHOT_VAR_OR_LEAVE(ccr, meta, ret, done);

		if (meta->op == VM_SNAPSHOT_RESTORE) {
		/* Reset the value of the 'timer_fire_bt' and the vlapic
		* callout based on the value of the current count
		* register saved when the VM snapshot was created
		*/
		vlapic_reset_callout(vlapic, ccr);
		}
		}

		done:
		return (ret);
		}
		#endif