Revision 16e604a437c89751dc626c9e90cf88ba93c5be64 authored by Alexandru Elisei on 07 August 2019, 09:53:20 UTC, committed by Marc Zyngier on 09 August 2019, 07:07:26 UTC
A HW mapped level sensitive interrupt asserted by a device will not be put
into the ap_list if it is disabled at the VGIC level. When it is enabled
again, it will be inserted into the ap_list and written to a list register
on guest entry regardless of the state of the device.

We could argue that this can also happen on real hardware, when the command
to enable the interrupt reached the GIC before the device had the chance to
de-assert the interrupt signal; however, we emulate the distributor and
redistributors in software and we can do better than that.

Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
1 parent c69509c
Raw File
asequencer.h
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 *  Main header file for the ALSA sequencer
 *  Copyright (c) 1998-1999 by Frank van de Pol <fvdpol@coil.demon.nl>
 *            (c) 1998-1999 by Jaroslav Kysela <perex@perex.cz>
 */
#ifndef __SOUND_ASEQUENCER_H
#define __SOUND_ASEQUENCER_H

#include <linux/ioctl.h>
#include <sound/asound.h>
#include <uapi/sound/asequencer.h>

/* helper macro */
#define snd_seq_event_bounce_ext_data(ev) ((void*)((char *)(ev)->data.ext.ptr + sizeof(struct snd_seq_event_bounce)))

/*
 * type check macros
 */
/* result events: 0-4 */
#define snd_seq_ev_is_result_type(ev)	((ev)->type < 5)
/* channel specific events: 5-19 */
#define snd_seq_ev_is_channel_type(ev)	((ev)->type >= 5 && (ev)->type < 20)
/* note events: 5-9 */
#define snd_seq_ev_is_note_type(ev)	((ev)->type >= 5 && (ev)->type < 10)
/* control events: 10-19 */
#define snd_seq_ev_is_control_type(ev)	((ev)->type >= 10 && (ev)->type < 20)
/* queue control events: 30-39 */
#define snd_seq_ev_is_queue_type(ev)	((ev)->type >= 30 && (ev)->type < 40)
/* system status messages */
#define snd_seq_ev_is_message_type(ev)	((ev)->type >= 60 && (ev)->type < 69)
/* sample messages */
#define snd_seq_ev_is_sample_type(ev)	((ev)->type >= 70 && (ev)->type < 79)
/* user-defined messages */
#define snd_seq_ev_is_user_type(ev)	((ev)->type >= 90 && (ev)->type < 99)
/* fixed length events: 0-99 */
#define snd_seq_ev_is_fixed_type(ev)	((ev)->type < 100)
/* variable length events: 130-139 */
#define snd_seq_ev_is_variable_type(ev)	((ev)->type >= 130 && (ev)->type < 140)
/* reserved for kernel */
#define snd_seq_ev_is_reserved(ev)	((ev)->type >= 150)

/* direct dispatched events */
#define snd_seq_ev_is_direct(ev)	((ev)->queue == SNDRV_SEQ_QUEUE_DIRECT)

/*
 * macros to check event flags
 */
/* prior events */
#define snd_seq_ev_is_prior(ev)		(((ev)->flags & SNDRV_SEQ_PRIORITY_MASK) == SNDRV_SEQ_PRIORITY_HIGH)

/* event length type */
#define snd_seq_ev_length_type(ev)	((ev)->flags & SNDRV_SEQ_EVENT_LENGTH_MASK)
#define snd_seq_ev_is_fixed(ev)		(snd_seq_ev_length_type(ev) == SNDRV_SEQ_EVENT_LENGTH_FIXED)
#define snd_seq_ev_is_variable(ev)	(snd_seq_ev_length_type(ev) == SNDRV_SEQ_EVENT_LENGTH_VARIABLE)
#define snd_seq_ev_is_varusr(ev)	(snd_seq_ev_length_type(ev) == SNDRV_SEQ_EVENT_LENGTH_VARUSR)

/* time-stamp type */
#define snd_seq_ev_timestamp_type(ev)	((ev)->flags & SNDRV_SEQ_TIME_STAMP_MASK)
#define snd_seq_ev_is_tick(ev)		(snd_seq_ev_timestamp_type(ev) == SNDRV_SEQ_TIME_STAMP_TICK)
#define snd_seq_ev_is_real(ev)		(snd_seq_ev_timestamp_type(ev) == SNDRV_SEQ_TIME_STAMP_REAL)

/* time-mode type */
#define snd_seq_ev_timemode_type(ev)	((ev)->flags & SNDRV_SEQ_TIME_MODE_MASK)
#define snd_seq_ev_is_abstime(ev)	(snd_seq_ev_timemode_type(ev) == SNDRV_SEQ_TIME_MODE_ABS)
#define snd_seq_ev_is_reltime(ev)	(snd_seq_ev_timemode_type(ev) == SNDRV_SEQ_TIME_MODE_REL)

/* queue sync port */
#define snd_seq_queue_sync_port(q)	((q) + 16)

#endif /* __SOUND_ASEQUENCER_H */
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