From: David Vrabel <david.vrabel@citrix.com>
To: xen-devel@lists.xen.org
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>,
Wei Liu <wei.liu2@citrix.com>,
David Vrabel <david.vrabel@citrix.com>,
Jan Beulich <jbeulich@suse.com>
Subject: [PATCH 03/16] xen/events: introduce test_and_set_mask
Date: Wed, 2 Oct 2013 18:14:48 +0100 [thread overview]
Message-ID: <1380734101-2991-4-git-send-email-david.vrabel@citrix.com> (raw)
In-Reply-To: <1380734101-2991-1-git-send-email-david.vrabel@citrix.com>
From: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
drivers/xen/events.c | 11 ++++++++---
1 files changed, 8 insertions(+), 3 deletions(-)
diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index 1e2c74b..359e983 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -352,6 +352,12 @@ static inline int test_evtchn(int port)
return sync_test_bit(port, BM(&s->evtchn_pending[0]));
}
+static inline int test_and_set_mask(int port)
+{
+ struct shared_info *s = HYPERVISOR_shared_info;
+ return sync_test_and_set_bit(port, BM(&s->evtchn_mask[0]));
+}
+
/**
* notify_remote_via_irq - send event to remote end of event channel via irq
@@ -1493,7 +1499,6 @@ void rebind_evtchn_irq(int evtchn, int irq)
/* Rebind an evtchn so that it gets delivered to a specific cpu */
static int rebind_irq_to_cpu(unsigned irq, unsigned tcpu)
{
- struct shared_info *s = HYPERVISOR_shared_info;
struct evtchn_bind_vcpu bind_vcpu;
int evtchn = evtchn_from_irq(irq);
int masked;
@@ -1516,7 +1521,7 @@ static int rebind_irq_to_cpu(unsigned irq, unsigned tcpu)
* Mask the event while changing the VCPU binding to prevent
* it being delivered on an unexpected VCPU.
*/
- masked = sync_test_and_set_bit(evtchn, BM(s->evtchn_mask));
+ masked = test_and_set_mask(evtchn);
/*
* If this fails, it usually just indicates that we're dealing with a
@@ -1548,7 +1553,7 @@ static int retrigger_evtchn(int evtchn)
if (!VALID_EVTCHN(evtchn))
return 0;
- masked = sync_test_and_set_bit(evtchn, BM(s->evtchn_mask));
+ masked = test_and_set_mask(evtchn);
sync_set_bit(evtchn, BM(s->evtchn_pending));
if (!masked)
unmask_evtchn(evtchn);
--
1.7.2.5
next prev parent reply other threads:[~2013-10-02 17:14 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-02 17:14 [PATCHv5 00/16] Linux: FIFO-based event channel ABI David Vrabel
2013-10-02 17:14 ` [PATCH 01/16] xen/events: refactor retrigger_dynirq() and resend_irq_on_evtchn() David Vrabel
2013-10-02 20:43 ` Konrad Rzeszutek Wilk
2013-10-02 21:01 ` David Vrabel
2013-10-02 21:08 ` Konrad Rzeszutek Wilk
2013-10-02 22:06 ` David Vrabel
2013-10-02 17:14 ` [PATCH 02/16] xen/events: remove unnecessary init_evtchn_cpu_bindings() David Vrabel
2013-10-02 17:14 ` David Vrabel [this message]
2013-10-02 17:14 ` [PATCH 04/16] xen/events: replace raw bit ops with functions David Vrabel
2013-10-02 17:14 ` [PATCH 05/16] xen/events: move drivers/xen/events.c into drivers/xen/events/ David Vrabel
2013-10-02 17:14 ` [PATCH 06/16] xen/events: move 2-level specific code into its own file David Vrabel
2013-10-02 17:14 ` [PATCH 07/16] xen/events: add struct evtchn_ops for the low-level port operations David Vrabel
2013-10-02 17:14 ` [PATCH 08/16] xen/events: allow setup of irq_info to fail David Vrabel
2013-10-02 17:14 ` [PATCH 09/16] xen/events: add a evtchn_op for port setup David Vrabel
2013-10-02 17:14 ` [PATCH 10/16] xen/events: Refactor evtchn_to_irq array to be dynamically allocated David Vrabel
2013-10-02 17:14 ` [PATCH 11/16] xen/events: add xen_evtchn_mask_all() David Vrabel
2013-10-02 17:14 ` [PATCH 12/16] xen/evtchn: support more than 4096 ports David Vrabel
2013-10-02 17:14 ` [PATCH 13/16] xen/events: Add the hypervisor interface for the FIFO-based event channels David Vrabel
2013-10-02 17:14 ` [PATCH 14/16] xen/events: allow event channel priority to be set David Vrabel
2013-10-02 17:15 ` [PATCH 15/16] xen/x86: set VIRQ_TIMER priority to maximum David Vrabel
2013-10-02 17:15 ` [PATCH 16/16] xen/events: use the FIFO-based ABI if available David Vrabel
-- strict thread matches above, loose matches on Subject: below --
2013-10-08 12:48 [PATCHv6 00/16] Linux: FIFO-based event channel ABI David Vrabel
2013-10-08 12:49 ` [PATCH 03/16] xen/events: introduce test_and_set_mask David Vrabel
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