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Miller" , Jakub Kicinski , Boris Ostrovsky , Stefano Stabellini Subject: [PATCH 4/7] xen/events: link interdomain events to associated xenbus device Date: Sat, 6 Feb 2021 11:49:29 +0100 Message-Id: <20210206104932.29064-5-jgross@suse.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210206104932.29064-1-jgross@suse.com> References: <20210206104932.29064-1-jgross@suse.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org In order to support the possibility of per-device event channel settings (e.g. lateeoi spurious event thresholds) add a xenbus device pointer to struct irq_info() and modify the related event channel binding interfaces to take the pointer to the xenbus device as a parameter instead of the domain id of the other side. While at it remove the stale prototype of bind_evtchn_to_irq_lateeoi(). Signed-off-by: Juergen Gross --- drivers/block/xen-blkback/xenbus.c | 2 +- drivers/net/xen-netback/interface.c | 16 +++++------ drivers/xen/events/events_base.c | 41 +++++++++++++++++------------ drivers/xen/pvcalls-back.c | 4 +-- drivers/xen/xen-pciback/xenbus.c | 2 +- drivers/xen/xen-scsiback.c | 2 +- include/xen/events.h | 7 ++--- 7 files changed, 41 insertions(+), 33 deletions(-) diff --git a/drivers/block/xen-blkback/xenbus.c b/drivers/block/xen-blkback/xenbus.c index 9860d4842f36..c2aaf690352c 100644 --- a/drivers/block/xen-blkback/xenbus.c +++ b/drivers/block/xen-blkback/xenbus.c @@ -245,7 +245,7 @@ static int xen_blkif_map(struct xen_blkif_ring *ring, grant_ref_t *gref, if (req_prod - rsp_prod > size) goto fail; - err = bind_interdomain_evtchn_to_irqhandler_lateeoi(blkif->domid, + err = bind_interdomain_evtchn_to_irqhandler_lateeoi(blkif->be->dev, evtchn, xen_blkif_be_int, 0, "blkif-backend", ring); if (err < 0) goto fail; diff --git a/drivers/net/xen-netback/interface.c b/drivers/net/xen-netback/interface.c index acb786d8b1d8..494b4330a4ea 100644 --- a/drivers/net/xen-netback/interface.c +++ b/drivers/net/xen-netback/interface.c @@ -628,13 +628,13 @@ int xenvif_connect_ctrl(struct xenvif *vif, grant_ref_t ring_ref, unsigned int evtchn) { struct net_device *dev = vif->dev; + struct xenbus_device *xendev = xenvif_to_xenbus_device(vif); void *addr; struct xen_netif_ctrl_sring *shared; RING_IDX rsp_prod, req_prod; int err; - err = xenbus_map_ring_valloc(xenvif_to_xenbus_device(vif), - &ring_ref, 1, &addr); + err = xenbus_map_ring_valloc(xendev, &ring_ref, 1, &addr); if (err) goto err; @@ -648,7 +648,7 @@ int xenvif_connect_ctrl(struct xenvif *vif, grant_ref_t ring_ref, if (req_prod - rsp_prod > RING_SIZE(&vif->ctrl)) goto err_unmap; - err = bind_interdomain_evtchn_to_irq_lateeoi(vif->domid, evtchn); + err = bind_interdomain_evtchn_to_irq_lateeoi(xendev, evtchn); if (err < 0) goto err_unmap; @@ -671,8 +671,7 @@ int xenvif_connect_ctrl(struct xenvif *vif, grant_ref_t ring_ref, vif->ctrl_irq = 0; err_unmap: - xenbus_unmap_ring_vfree(xenvif_to_xenbus_device(vif), - vif->ctrl.sring); + xenbus_unmap_ring_vfree(xendev, vif->ctrl.sring); vif->ctrl.sring = NULL; err: @@ -717,6 +716,7 @@ int xenvif_connect_data(struct xenvif_queue *queue, unsigned int tx_evtchn, unsigned int rx_evtchn) { + struct xenbus_device *dev = xenvif_to_xenbus_device(queue->vif); struct task_struct *task; int err; @@ -753,7 +753,7 @@ int xenvif_connect_data(struct xenvif_queue *queue, if (tx_evtchn == rx_evtchn) { /* feature-split-event-channels == 0 */ err = bind_interdomain_evtchn_to_irqhandler_lateeoi( - queue->vif->domid, tx_evtchn, xenvif_interrupt, 0, + dev, tx_evtchn, xenvif_interrupt, 0, queue->name, queue); if (err < 0) goto err; @@ -764,7 +764,7 @@ int xenvif_connect_data(struct xenvif_queue *queue, snprintf(queue->tx_irq_name, sizeof(queue->tx_irq_name), "%s-tx", queue->name); err = bind_interdomain_evtchn_to_irqhandler_lateeoi( - queue->vif->domid, tx_evtchn, xenvif_tx_interrupt, 0, + dev, tx_evtchn, xenvif_tx_interrupt, 0, queue->tx_irq_name, queue); if (err < 0) goto err; @@ -774,7 +774,7 @@ int xenvif_connect_data(struct xenvif_queue *queue, snprintf(queue->rx_irq_name, sizeof(queue->rx_irq_name), "%s-rx", queue->name); err = bind_interdomain_evtchn_to_irqhandler_lateeoi( - queue->vif->domid, rx_evtchn, xenvif_rx_interrupt, 0, + dev, rx_evtchn, xenvif_rx_interrupt, 0, queue->rx_irq_name, queue); if (err < 0) goto err; diff --git a/drivers/xen/events/events_base.c b/drivers/xen/events/events_base.c index 7b26ef817f8b..8c620c11e32a 100644 --- a/drivers/xen/events/events_base.c +++ b/drivers/xen/events/events_base.c @@ -63,6 +63,7 @@ #include #include #include +#include #include #include "events_internal.h" @@ -117,6 +118,7 @@ struct irq_info { unsigned char flags; uint16_t domid; } pirq; + struct xenbus_device *interdomain; } u; }; @@ -317,11 +319,16 @@ static int xen_irq_info_common_setup(struct irq_info *info, } static int xen_irq_info_evtchn_setup(unsigned irq, - evtchn_port_t evtchn) + evtchn_port_t evtchn, + struct xenbus_device *dev) { struct irq_info *info = info_for_irq(irq); + int ret; - return xen_irq_info_common_setup(info, irq, IRQT_EVTCHN, evtchn, 0); + ret = xen_irq_info_common_setup(info, irq, IRQT_EVTCHN, evtchn, 0); + info->u.interdomain = dev; + + return ret; } static int xen_irq_info_ipi_setup(unsigned cpu, @@ -1128,7 +1135,8 @@ int xen_pirq_from_irq(unsigned irq) } EXPORT_SYMBOL_GPL(xen_pirq_from_irq); -static int bind_evtchn_to_irq_chip(evtchn_port_t evtchn, struct irq_chip *chip) +static int bind_evtchn_to_irq_chip(evtchn_port_t evtchn, struct irq_chip *chip, + struct xenbus_device *dev) { int irq; int ret; @@ -1148,7 +1156,7 @@ static int bind_evtchn_to_irq_chip(evtchn_port_t evtchn, struct irq_chip *chip) irq_set_chip_and_handler_name(irq, chip, handle_edge_irq, "event"); - ret = xen_irq_info_evtchn_setup(irq, evtchn); + ret = xen_irq_info_evtchn_setup(irq, evtchn, dev); if (ret < 0) { __unbind_from_irq(irq); irq = ret; @@ -1175,7 +1183,7 @@ static int bind_evtchn_to_irq_chip(evtchn_port_t evtchn, struct irq_chip *chip) int bind_evtchn_to_irq(evtchn_port_t evtchn) { - return bind_evtchn_to_irq_chip(evtchn, &xen_dynamic_chip); + return bind_evtchn_to_irq_chip(evtchn, &xen_dynamic_chip, NULL); } EXPORT_SYMBOL_GPL(bind_evtchn_to_irq); @@ -1224,27 +1232,27 @@ static int bind_ipi_to_irq(unsigned int ipi, unsigned int cpu) return irq; } -static int bind_interdomain_evtchn_to_irq_chip(unsigned int remote_domain, +static int bind_interdomain_evtchn_to_irq_chip(struct xenbus_device *dev, evtchn_port_t remote_port, struct irq_chip *chip) { struct evtchn_bind_interdomain bind_interdomain; int err; - bind_interdomain.remote_dom = remote_domain; + bind_interdomain.remote_dom = dev->otherend_id; bind_interdomain.remote_port = remote_port; err = HYPERVISOR_event_channel_op(EVTCHNOP_bind_interdomain, &bind_interdomain); return err ? : bind_evtchn_to_irq_chip(bind_interdomain.local_port, - chip); + chip, dev); } -int bind_interdomain_evtchn_to_irq_lateeoi(unsigned int remote_domain, +int bind_interdomain_evtchn_to_irq_lateeoi(struct xenbus_device *dev, evtchn_port_t remote_port) { - return bind_interdomain_evtchn_to_irq_chip(remote_domain, remote_port, + return bind_interdomain_evtchn_to_irq_chip(dev, remote_port, &xen_lateeoi_chip); } EXPORT_SYMBOL_GPL(bind_interdomain_evtchn_to_irq_lateeoi); @@ -1357,7 +1365,7 @@ static int bind_evtchn_to_irqhandler_chip(evtchn_port_t evtchn, { int irq, retval; - irq = bind_evtchn_to_irq_chip(evtchn, chip); + irq = bind_evtchn_to_irq_chip(evtchn, chip, NULL); if (irq < 0) return irq; retval = request_irq(irq, handler, irqflags, devname, dev_id); @@ -1392,14 +1400,13 @@ int bind_evtchn_to_irqhandler_lateeoi(evtchn_port_t evtchn, EXPORT_SYMBOL_GPL(bind_evtchn_to_irqhandler_lateeoi); static int bind_interdomain_evtchn_to_irqhandler_chip( - unsigned int remote_domain, evtchn_port_t remote_port, + struct xenbus_device *dev, evtchn_port_t remote_port, irq_handler_t handler, unsigned long irqflags, const char *devname, void *dev_id, struct irq_chip *chip) { int irq, retval; - irq = bind_interdomain_evtchn_to_irq_chip(remote_domain, remote_port, - chip); + irq = bind_interdomain_evtchn_to_irq_chip(dev, remote_port, chip); if (irq < 0) return irq; @@ -1412,14 +1419,14 @@ static int bind_interdomain_evtchn_to_irqhandler_chip( return irq; } -int bind_interdomain_evtchn_to_irqhandler_lateeoi(unsigned int remote_domain, +int bind_interdomain_evtchn_to_irqhandler_lateeoi(struct xenbus_device *dev, evtchn_port_t remote_port, irq_handler_t handler, unsigned long irqflags, const char *devname, void *dev_id) { - return bind_interdomain_evtchn_to_irqhandler_chip(remote_domain, + return bind_interdomain_evtchn_to_irqhandler_chip(dev, remote_port, handler, irqflags, devname, dev_id, &xen_lateeoi_chip); } @@ -1691,7 +1698,7 @@ void rebind_evtchn_irq(evtchn_port_t evtchn, int irq) so there should be a proper type */ BUG_ON(info->type == IRQT_UNBOUND); - (void)xen_irq_info_evtchn_setup(irq, evtchn); + (void)xen_irq_info_evtchn_setup(irq, evtchn, NULL); mutex_unlock(&irq_mapping_update_lock); diff --git a/drivers/xen/pvcalls-back.c b/drivers/xen/pvcalls-back.c index a7d293fa8d14..b47fd8435061 100644 --- a/drivers/xen/pvcalls-back.c +++ b/drivers/xen/pvcalls-back.c @@ -348,7 +348,7 @@ static struct sock_mapping *pvcalls_new_active_socket( map->bytes = page; ret = bind_interdomain_evtchn_to_irqhandler_lateeoi( - fedata->dev->otherend_id, evtchn, + fedata->dev, evtchn, pvcalls_back_conn_event, 0, "pvcalls-backend", map); if (ret < 0) goto out; @@ -948,7 +948,7 @@ static int backend_connect(struct xenbus_device *dev) goto error; } - err = bind_interdomain_evtchn_to_irq_lateeoi(dev->otherend_id, evtchn); + err = bind_interdomain_evtchn_to_irq_lateeoi(dev, evtchn); if (err < 0) goto error; fedata->irq = err; diff --git a/drivers/xen/xen-pciback/xenbus.c b/drivers/xen/xen-pciback/xenbus.c index e7c692cfb2cf..5188f02e75fb 100644 --- a/drivers/xen/xen-pciback/xenbus.c +++ b/drivers/xen/xen-pciback/xenbus.c @@ -124,7 +124,7 @@ static int xen_pcibk_do_attach(struct xen_pcibk_device *pdev, int gnt_ref, pdev->sh_info = vaddr; err = bind_interdomain_evtchn_to_irqhandler_lateeoi( - pdev->xdev->otherend_id, remote_evtchn, xen_pcibk_handle_event, + pdev->xdev, remote_evtchn, xen_pcibk_handle_event, 0, DRV_NAME, pdev); if (err < 0) { xenbus_dev_fatal(pdev->xdev, err, diff --git a/drivers/xen/xen-scsiback.c b/drivers/xen/xen-scsiback.c index 862162dca33c..8b59897b2df9 100644 --- a/drivers/xen/xen-scsiback.c +++ b/drivers/xen/xen-scsiback.c @@ -799,7 +799,7 @@ static int scsiback_init_sring(struct vscsibk_info *info, grant_ref_t ring_ref, sring = (struct vscsiif_sring *)area; BACK_RING_INIT(&info->ring, sring, PAGE_SIZE); - err = bind_interdomain_evtchn_to_irq_lateeoi(info->domid, evtchn); + err = bind_interdomain_evtchn_to_irq_lateeoi(info->dev, evtchn); if (err < 0) goto unmap_page; diff --git a/include/xen/events.h b/include/xen/events.h index 8ec418e30c7f..c204262d9fc2 100644 --- a/include/xen/events.h +++ b/include/xen/events.h @@ -12,10 +12,11 @@ #include #include +struct xenbus_device; + unsigned xen_evtchn_nr_channels(void); int bind_evtchn_to_irq(evtchn_port_t evtchn); -int bind_evtchn_to_irq_lateeoi(evtchn_port_t evtchn); int bind_evtchn_to_irqhandler(evtchn_port_t evtchn, irq_handler_t handler, unsigned long irqflags, const char *devname, @@ -35,9 +36,9 @@ int bind_ipi_to_irqhandler(enum ipi_vector ipi, unsigned long irqflags, const char *devname, void *dev_id); -int bind_interdomain_evtchn_to_irq_lateeoi(unsigned int remote_domain, +int bind_interdomain_evtchn_to_irq_lateeoi(struct xenbus_device *dev, evtchn_port_t remote_port); -int bind_interdomain_evtchn_to_irqhandler_lateeoi(unsigned int remote_domain, +int bind_interdomain_evtchn_to_irqhandler_lateeoi(struct xenbus_device *dev, evtchn_port_t remote_port, irq_handler_t handler, unsigned long irqflags, -- 2.26.2