[Xen-devel] [PATCH 2/2] passthrough: deliver IRQs even if bsp is halted (support kexec/kdump on hvm)

[Kouya Shimura <kouya@xxxxxxxxxxxxxx>]

This patch is needed for kexec/kdump on hvm since kdump halts bsp.

Signed-off-by: Kouya Shimura <kouya@xxxxxxxxxxxxxx>

diff -r 7397608bce87 xen/drivers/passthrough/io.c
--- a/xen/drivers/passthrough/io.c      Mon Jun 29 15:50:32 2009 +0100
+++ b/xen/drivers/passthrough/io.c      Tue Jun 30 13:16:26 2009 +0900
@@ -362,6 +362,7 @@ int pt_irq_destroy_bind_vtd(
 int hvm_do_IRQ_dpci(struct domain *d, unsigned int mirq)
 {
     struct hvm_irq_dpci *dpci = domain_get_irq_dpci(d);
+    struct vcpu *v;
 
     ASSERT(spin_is_locked(&irq_desc[domain_irq_to_vector(d, mirq)].lock));
     if ( !iommu_enabled || (d == dom0) || !dpci ||
@@ -378,7 +379,13 @@ int hvm_do_IRQ_dpci(struct domain *d, un
     if ( pt_irq_need_timer(dpci->mirq[mirq].flags) )
         set_timer(&dpci->hvm_timer[domain_irq_to_vector(d, mirq)],
                   NOW() + PT_IRQ_TIME_OUT);
-    vcpu_kick(d->vcpu[0]);
+
+    for_each_vcpu(d, v)
+        if ( !test_bit(_VPF_down, &v->pause_flags) )
+        {
+            vcpu_kick(v);
+            break;
+        }
 
     return 1;
 }
@@ -437,7 +444,7 @@ void hvm_dirq_assist(struct vcpu *v)
     struct hvm_irq_dpci *hvm_irq_dpci = d->arch.hvm_domain.irq.dpci;
     struct dev_intx_gsi_link *digl;
 
-    if ( !iommu_enabled || (v->vcpu_id != 0) || (hvm_irq_dpci == NULL) )
+    if ( !iommu_enabled || (hvm_irq_dpci == NULL) )
         return;
 
     for ( irq = find_first_bit(hvm_irq_dpci->dirq_mask, d->nr_pirqs);

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