From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wei Liu Subject: [PATCH 11/13] xen: introduce xen_event_channel_register_nlevel Date: Thu, 31 Jan 2013 14:47:05 +0000 Message-ID: <1359643627-29486-12-git-send-email-wei.liu2@citrix.com> References: <1359643627-29486-1-git-send-email-wei.liu2@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1359643627-29486-1-git-send-email-wei.liu2@citrix.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: xen-devel@lists.xen.org Cc: david.vrabel@citrix.com, Wei Liu , ian.campbell@citrix.com, jbeulich@suse.com, konrad.wilk@oracle.com List-Id: xen-devel@lists.xenproject.org Signed-off-by: Wei Liu --- drivers/xen/events.c | 46 ++++++++++++++++++++++++++++++++++++++++------ include/xen/events.h | 6 ++++++ 2 files changed, 46 insertions(+), 6 deletions(-) diff --git a/drivers/xen/events.c b/drivers/xen/events.c index 9038211..f77909d 100644 --- a/drivers/xen/events.c +++ b/drivers/xen/events.c @@ -2217,17 +2217,51 @@ err: return rc; } +int xen_event_channel_register_nlevel(unsigned int level) +{ + int rc; + + switch (level) { + case 3: + rc = xen_event_channel_register_3level(); + break; + default: + printk(KERN_INFO "Trying to register unsupported %d-level event channel\n", + level); + rc = -EINVAL; + } + + return rc; +} + +void xen_set_event_channel_nlevel(unsigned int level) +{ + struct shared_info *s = HYPERVISOR_shared_info; + switch (level) { + case 2: + evtchn_pending = s->evtchn_pending; + evtchn_mask = s->evtchn_mask; + evtchn_level = 2; + nr_event_channels = NR_EVENT_CHANNELS_L2; + break; + case 3: + /* evtchn_pending/mask already set */ + evtchn_level = 3; + nr_event_channels = NR_EVENT_CHANNELS_L3; + break; + default: + printk(KERN_EMERG "Trying to set unsupported %d-level event channel\n", + level); + BUG(); + } +} + void __init xen_init_IRQ(void) { int i, rc; int cpu; - struct shared_info *s = HYPERVISOR_shared_info; - - evtchn_pending = s->evtchn_pending; - evtchn_mask = s->evtchn_mask; - evtchn_level = 2; - nr_event_channels = NR_EVENT_CHANNELS_L2; + xen_set_event_channel_nlevel(2); evtchn_to_irq = kcalloc(nr_event_channels, sizeof(*evtchn_to_irq), GFP_KERNEL); diff --git a/include/xen/events.h b/include/xen/events.h index 6b117ac..cbc1b71 100644 --- a/include/xen/events.h +++ b/include/xen/events.h @@ -111,4 +111,10 @@ int xen_test_irq_shared(int irq); extern unsigned int nr_event_channels; +/* Register N-level event channel */ +int xen_event_channel_register_nlevel(unsigned int level); + +/* Set event channel to N-level if registration succeed */ +void xen_set_event_channel_nlevel(unsigned int level); + #endif /* _XEN_EVENTS_H */ -- 1.7.10.4