fedora core 6 1.2949 + vserver 2.2.0

[linux-2.6.git] / arch / x86_64 / kernel / genapic_xen.c

diff --git a/arch/x86_64/kernel/genapic_xen.c b/arch/x86_64/kernel/genapic_xen.c
index 3079d64..0c651ef 100644 (file)
--- a/arch/x86_64/kernel/genapic_xen.c
+++ b/arch/x86_64/kernel/genapic_xen.c
@@ -71,6 +71,20 @@ static cpumask_t xen_target_cpus(void)
        return cpu_online_map;
 }
 
+static cpumask_t xen_vector_allocation_domain(int cpu)
+{
+       /* Careful. Some cpus do not strictly honor the set of cpus
+        * specified in the interrupt destination when using lowest
+        * priority interrupt delivery mode.
+        *
+        * In particular there was a hyperthreading cpu observed to
+        * deliver interrupts to the wrong hyperthread when only one
+        * hyperthread was specified in the interrupt desitination.
+        */
+       cpumask_t domain = { { [0] = APIC_ALL_CPUS, } };
+       return domain;
+}
+
 /*
  * Set up the logical destination ID.
  * Do nothing, not called now.
@@ -162,8 +176,8 @@ struct genapic apic_xen =  {
        .int_delivery_mode = dest_LowestPrio,
 #endif
        .int_dest_mode = (APIC_DEST_LOGICAL != 0),
-       .int_delivery_dest = APIC_DEST_LOGICAL | APIC_DM_LOWEST,
        .target_cpus = xen_target_cpus,
+       .vector_allocation_domain = xen_vector_allocation_domain,
 #ifdef CONFIG_XEN_PRIVILEGED_GUEST
        .apic_id_registered = xen_apic_id_registered,
 #endif