8724a18868
config handling stack overflow 55a62eb0-xl-correct-handling-of-extra_config-in-main_cpupoolcreate.patch - bsc#907514 - Bus fatal error & sles12 sudden reboot has been observed - bsc#910258 - SLES12 Xen host crashes with FATAL NMI after shutdown of guest with VT-d NIC - bsc#918984 - Bus fatal error & sles11-SP4 sudden reboot has been observed - bsc#923967 - Partner-L3: Bus fatal error & sles11-SP3 sudden reboot has been observed 552d293b-x86-vMSI-X-honor-all-mask-requests.patch 552d2966-x86-vMSI-X-add-valid-bits-for-read-acceleration.patch 5576f143-x86-adjust-PV-I-O-emulation-functions-types.patch 55795a52-x86-vMSI-X-support-qword-MMIO-access.patch 5583d9c5-x86-MSI-X-cleanup.patch 5583da09-x86-MSI-track-host-and-guest-masking-separately.patch 55b0a218-x86-PCI-CFG-write-intercept.patch 55b0a255-x86-MSI-X-maskall.patch 55b0a283-x86-MSI-X-teardown.patch 55b0a2ab-x86-MSI-X-enable.patch 55b0a2db-x86-MSI-track-guest-masking.patch - Upstream patches from Jan 552d0f49-x86-traps-identify-the-vcpu-in-context-when-dumping-regs.patch 559bc633-x86-cpupool-clear-proper-cpu_valid-bit-on-CPU-teardown.patch 559bc64e-credit1-properly-deal-with-CPUs-not-in-any-pool.patch 559bc87f-x86-hvmloader-avoid-data-corruption-with-xenstore-rw.patch 55a66a1e-make-rangeset_report_ranges-report-all-ranges.patch 55a77e4f-dmar-device-scope-mem-leak-fix.patch OBS-URL: https://build.opensuse.org/package/show/Virtualization/xen?expand=0&rev=373
64 lines
2.2 KiB
Diff
64 lines
2.2 KiB
Diff
# Commit 01280dc19cf3da089f98faf4f524b54b5a191df0
|
|
# Date 2015-06-18 14:53:23 +0200
|
|
# Author David Vrabel <david.vrabel@citrix.com>
|
|
# Committer Jan Beulich <jbeulich@suse.com>
|
|
evtchn: simplify port_is_valid()
|
|
|
|
By keeping a count of the number of currently valid event channels,
|
|
port_is_valid() can be simplified.
|
|
|
|
d->valid_evtchns is only increased (while holding d->event_lock), so
|
|
port_is_valid() may be safely called without taking the lock (this
|
|
will be useful later).
|
|
|
|
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
|
|
|
|
--- a/xen/common/event_channel.c
|
|
+++ b/xen/common/event_channel.c
|
|
@@ -191,6 +191,8 @@ static int get_free_port(struct domain *
|
|
return -ENOMEM;
|
|
bucket_from_port(d, port) = chn;
|
|
|
|
+ write_atomic(&d->valid_evtchns, d->valid_evtchns + EVTCHNS_PER_BUCKET);
|
|
+
|
|
return port;
|
|
}
|
|
|
|
@@ -1264,6 +1266,7 @@ int evtchn_init(struct domain *d)
|
|
d->evtchn = alloc_evtchn_bucket(d, 0);
|
|
if ( !d->evtchn )
|
|
return -ENOMEM;
|
|
+ d->valid_evtchns = EVTCHNS_PER_BUCKET;
|
|
|
|
spin_lock_init(&d->event_lock);
|
|
if ( get_free_port(d) != 0 )
|
|
--- a/xen/include/xen/event.h
|
|
+++ b/xen/include/xen/event.h
|
|
@@ -90,11 +90,7 @@ static inline bool_t port_is_valid(struc
|
|
{
|
|
if ( p >= d->max_evtchns )
|
|
return 0;
|
|
- if ( !d->evtchn )
|
|
- return 0;
|
|
- if ( p < EVTCHNS_PER_BUCKET )
|
|
- return 1;
|
|
- return group_from_port(d, p) != NULL && bucket_from_port(d, p) != NULL;
|
|
+ return p < read_atomic(&d->valid_evtchns);
|
|
}
|
|
|
|
static inline struct evtchn *evtchn_from_port(struct domain *d, unsigned int p)
|
|
--- a/xen/include/xen/sched.h
|
|
+++ b/xen/include/xen/sched.h
|
|
@@ -339,8 +339,9 @@ struct domain
|
|
/* Event channel information. */
|
|
struct evtchn *evtchn; /* first bucket only */
|
|
struct evtchn **evtchn_group[NR_EVTCHN_GROUPS]; /* all other buckets */
|
|
- unsigned int max_evtchns;
|
|
- unsigned int max_evtchn_port;
|
|
+ unsigned int max_evtchns; /* number supported by ABI */
|
|
+ unsigned int max_evtchn_port; /* max permitted port number */
|
|
+ unsigned int valid_evtchns; /* number of allocated event channels */
|
|
spinlock_t event_lock;
|
|
const struct evtchn_port_ops *evtchn_port_ops;
|
|
struct evtchn_fifo_domain *evtchn_fifo;
|