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Diffstat (limited to 'system/xen/xsa/xsa343-2.patch')
-rw-r--r--system/xen/xsa/xsa343-2.patch295
1 files changed, 0 insertions, 295 deletions
diff --git a/system/xen/xsa/xsa343-2.patch b/system/xen/xsa/xsa343-2.patch
deleted file mode 100644
index b8eb4998f11dd..0000000000000
--- a/system/xen/xsa/xsa343-2.patch
+++ /dev/null
@@ -1,295 +0,0 @@
-From: Jan Beulich <jbeulich@suse.com>
-Subject: evtchn: convert per-channel lock to be IRQ-safe
-
-... in order for send_guest_{global,vcpu}_virq() to be able to make use
-of it.
-
-This is part of XSA-343.
-
-Signed-off-by: Jan Beulich <jbeulich@suse.com>
-Acked-by: Julien Grall <jgrall@amazon.com>
----
-v6: New.
----
-TBD: This is the "dumb" conversion variant. In a couple of cases the
- slightly simpler spin_{,un}lock_irq() could apparently be used.
-
---- a/xen/common/event_channel.c
-+++ b/xen/common/event_channel.c
-@@ -248,6 +248,7 @@ static long evtchn_alloc_unbound(evtchn_
- int port;
- domid_t dom = alloc->dom;
- long rc;
-+ unsigned long flags;
-
- d = rcu_lock_domain_by_any_id(dom);
- if ( d == NULL )
-@@ -263,14 +264,14 @@ static long evtchn_alloc_unbound(evtchn_
- if ( rc )
- goto out;
-
-- spin_lock(&chn->lock);
-+ spin_lock_irqsave(&chn->lock, flags);
-
- chn->state = ECS_UNBOUND;
- if ( (chn->u.unbound.remote_domid = alloc->remote_dom) == DOMID_SELF )
- chn->u.unbound.remote_domid = current->domain->domain_id;
- evtchn_port_init(d, chn);
-
-- spin_unlock(&chn->lock);
-+ spin_unlock_irqrestore(&chn->lock, flags);
-
- alloc->port = port;
-
-@@ -283,26 +284,32 @@ static long evtchn_alloc_unbound(evtchn_
- }
-
-
--static void double_evtchn_lock(struct evtchn *lchn, struct evtchn *rchn)
-+static unsigned long double_evtchn_lock(struct evtchn *lchn,
-+ struct evtchn *rchn)
- {
-- if ( lchn < rchn )
-+ unsigned long flags;
-+
-+ if ( lchn <= rchn )
- {
-- spin_lock(&lchn->lock);
-- spin_lock(&rchn->lock);
-+ spin_lock_irqsave(&lchn->lock, flags);
-+ if ( lchn != rchn )
-+ spin_lock(&rchn->lock);
- }
- else
- {
-- if ( lchn != rchn )
-- spin_lock(&rchn->lock);
-+ spin_lock_irqsave(&rchn->lock, flags);
- spin_lock(&lchn->lock);
- }
-+
-+ return flags;
- }
-
--static void double_evtchn_unlock(struct evtchn *lchn, struct evtchn *rchn)
-+static void double_evtchn_unlock(struct evtchn *lchn, struct evtchn *rchn,
-+ unsigned long flags)
- {
-- spin_unlock(&lchn->lock);
- if ( lchn != rchn )
-- spin_unlock(&rchn->lock);
-+ spin_unlock(&lchn->lock);
-+ spin_unlock_irqrestore(&rchn->lock, flags);
- }
-
- static long evtchn_bind_interdomain(evtchn_bind_interdomain_t *bind)
-@@ -312,6 +319,7 @@ static long evtchn_bind_interdomain(evtc
- int lport, rport = bind->remote_port;
- domid_t rdom = bind->remote_dom;
- long rc;
-+ unsigned long flags;
-
- if ( rdom == DOMID_SELF )
- rdom = current->domain->domain_id;
-@@ -347,7 +355,7 @@ static long evtchn_bind_interdomain(evtc
- if ( rc )
- goto out;
-
-- double_evtchn_lock(lchn, rchn);
-+ flags = double_evtchn_lock(lchn, rchn);
-
- lchn->u.interdomain.remote_dom = rd;
- lchn->u.interdomain.remote_port = rport;
-@@ -364,7 +372,7 @@ static long evtchn_bind_interdomain(evtc
- */
- evtchn_port_set_pending(ld, lchn->notify_vcpu_id, lchn);
-
-- double_evtchn_unlock(lchn, rchn);
-+ double_evtchn_unlock(lchn, rchn, flags);
-
- bind->local_port = lport;
-
-@@ -387,6 +395,7 @@ int evtchn_bind_virq(evtchn_bind_virq_t
- struct domain *d = current->domain;
- int virq = bind->virq, vcpu = bind->vcpu;
- int rc = 0;
-+ unsigned long flags;
-
- if ( (virq < 0) || (virq >= ARRAY_SIZE(v->virq_to_evtchn)) )
- return -EINVAL;
-@@ -424,14 +433,14 @@ int evtchn_bind_virq(evtchn_bind_virq_t
-
- chn = evtchn_from_port(d, port);
-
-- spin_lock(&chn->lock);
-+ spin_lock_irqsave(&chn->lock, flags);
-
- chn->state = ECS_VIRQ;
- chn->notify_vcpu_id = vcpu;
- chn->u.virq = virq;
- evtchn_port_init(d, chn);
-
-- spin_unlock(&chn->lock);
-+ spin_unlock_irqrestore(&chn->lock, flags);
-
- v->virq_to_evtchn[virq] = bind->port = port;
-
-@@ -448,6 +457,7 @@ static long evtchn_bind_ipi(evtchn_bind_
- struct domain *d = current->domain;
- int port, vcpu = bind->vcpu;
- long rc = 0;
-+ unsigned long flags;
-
- if ( domain_vcpu(d, vcpu) == NULL )
- return -ENOENT;
-@@ -459,13 +469,13 @@ static long evtchn_bind_ipi(evtchn_bind_
-
- chn = evtchn_from_port(d, port);
-
-- spin_lock(&chn->lock);
-+ spin_lock_irqsave(&chn->lock, flags);
-
- chn->state = ECS_IPI;
- chn->notify_vcpu_id = vcpu;
- evtchn_port_init(d, chn);
-
-- spin_unlock(&chn->lock);
-+ spin_unlock_irqrestore(&chn->lock, flags);
-
- bind->port = port;
-
-@@ -509,6 +519,7 @@ static long evtchn_bind_pirq(evtchn_bind
- struct pirq *info;
- int port = 0, pirq = bind->pirq;
- long rc;
-+ unsigned long flags;
-
- if ( (pirq < 0) || (pirq >= d->nr_pirqs) )
- return -EINVAL;
-@@ -541,14 +552,14 @@ static long evtchn_bind_pirq(evtchn_bind
- goto out;
- }
-
-- spin_lock(&chn->lock);
-+ spin_lock_irqsave(&chn->lock, flags);
-
- chn->state = ECS_PIRQ;
- chn->u.pirq.irq = pirq;
- link_pirq_port(port, chn, v);
- evtchn_port_init(d, chn);
-
-- spin_unlock(&chn->lock);
-+ spin_unlock_irqrestore(&chn->lock, flags);
-
- bind->port = port;
-
-@@ -569,6 +580,7 @@ int evtchn_close(struct domain *d1, int
- struct evtchn *chn1, *chn2;
- int port2;
- long rc = 0;
-+ unsigned long flags;
-
- again:
- spin_lock(&d1->event_lock);
-@@ -668,14 +680,14 @@ int evtchn_close(struct domain *d1, int
- BUG_ON(chn2->state != ECS_INTERDOMAIN);
- BUG_ON(chn2->u.interdomain.remote_dom != d1);
-
-- double_evtchn_lock(chn1, chn2);
-+ flags = double_evtchn_lock(chn1, chn2);
-
- evtchn_free(d1, chn1);
-
- chn2->state = ECS_UNBOUND;
- chn2->u.unbound.remote_domid = d1->domain_id;
-
-- double_evtchn_unlock(chn1, chn2);
-+ double_evtchn_unlock(chn1, chn2, flags);
-
- goto out;
-
-@@ -683,9 +695,9 @@ int evtchn_close(struct domain *d1, int
- BUG();
- }
-
-- spin_lock(&chn1->lock);
-+ spin_lock_irqsave(&chn1->lock, flags);
- evtchn_free(d1, chn1);
-- spin_unlock(&chn1->lock);
-+ spin_unlock_irqrestore(&chn1->lock, flags);
-
- out:
- if ( d2 != NULL )
-@@ -705,13 +717,14 @@ int evtchn_send(struct domain *ld, unsig
- struct evtchn *lchn, *rchn;
- struct domain *rd;
- int rport, ret = 0;
-+ unsigned long flags;
-
- if ( !port_is_valid(ld, lport) )
- return -EINVAL;
-
- lchn = evtchn_from_port(ld, lport);
-
-- spin_lock(&lchn->lock);
-+ spin_lock_irqsave(&lchn->lock, flags);
-
- /* Guest cannot send via a Xen-attached event channel. */
- if ( unlikely(consumer_is_xen(lchn)) )
-@@ -746,7 +759,7 @@ int evtchn_send(struct domain *ld, unsig
- }
-
- out:
-- spin_unlock(&lchn->lock);
-+ spin_unlock_irqrestore(&lchn->lock, flags);
-
- return ret;
- }
-@@ -1238,6 +1251,7 @@ int alloc_unbound_xen_event_channel(
- {
- struct evtchn *chn;
- int port, rc;
-+ unsigned long flags;
-
- spin_lock(&ld->event_lock);
-
-@@ -1250,14 +1264,14 @@ int alloc_unbound_xen_event_channel(
- if ( rc )
- goto out;
-
-- spin_lock(&chn->lock);
-+ spin_lock_irqsave(&chn->lock, flags);
-
- chn->state = ECS_UNBOUND;
- chn->xen_consumer = get_xen_consumer(notification_fn);
- chn->notify_vcpu_id = lvcpu;
- chn->u.unbound.remote_domid = remote_domid;
-
-- spin_unlock(&chn->lock);
-+ spin_unlock_irqrestore(&chn->lock, flags);
-
- write_atomic(&ld->xen_evtchns, ld->xen_evtchns + 1);
-
-@@ -1280,11 +1294,12 @@ void notify_via_xen_event_channel(struct
- {
- struct evtchn *lchn, *rchn;
- struct domain *rd;
-+ unsigned long flags;
-
- ASSERT(port_is_valid(ld, lport));
- lchn = evtchn_from_port(ld, lport);
-
-- spin_lock(&lchn->lock);
-+ spin_lock_irqsave(&lchn->lock, flags);
-
- if ( likely(lchn->state == ECS_INTERDOMAIN) )
- {
-@@ -1294,7 +1309,7 @@ void notify_via_xen_event_channel(struct
- evtchn_port_set_pending(rd, rchn->notify_vcpu_id, rchn);
- }
-
-- spin_unlock(&lchn->lock);
-+ spin_unlock_irqrestore(&lchn->lock, flags);
- }
-
- void evtchn_check_pollers(struct domain *d, unsigned int port)
generated by cgit v1.2.3 (git 2.26.2) at 2025-02-27 23:08:40 +0000