[Xen-changelog] [xen-unstable] AMD IOMMU: Enable MSI for hvm guest

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1213193906 -3600
# Node ID 54c6fc432763c12791f2a38bb3d8c82bf673b9bb
# Parent  7c771f0a24f37cbb3ab56db79f3a82106b42f4d8
AMD IOMMU: Enable MSI for hvm guest
Signed-off-by: Wei Wang <wei.wang2@xxxxxxx>
---
 xen/arch/x86/hvm/svm/intr.c |   16 ++++++++++++++--
 1 files changed, 14 insertions(+), 2 deletions(-)

diff -r 7c771f0a24f3 -r 54c6fc432763 xen/arch/x86/hvm/svm/intr.c
--- a/xen/arch/x86/hvm/svm/intr.c       Wed Jun 11 11:35:35 2008 +0100
+++ b/xen/arch/x86/hvm/svm/intr.c       Wed Jun 11 15:18:26 2008 +0100
@@ -100,6 +100,12 @@ static void enable_intr_window(struct vc
     vmcb->general1_intercepts |= GENERAL1_INTERCEPT_VINTR;
 }
 
+extern int vmsi_deliver(struct domain *d, int pirq);
+static int hvm_pci_msi_assert(struct domain *d, int pirq)
+{
+    return vmsi_deliver(d, pirq);
+}
+
 static void svm_dirq_assist(struct vcpu *v)
 {
     unsigned int irq;
@@ -118,7 +124,13 @@ static void svm_dirq_assist(struct vcpu 
         if ( !test_and_clear_bit(irq, &hvm_irq_dpci->dirq_mask) )
             continue;
 
-        stop_timer(&hvm_irq_dpci->hvm_timer[irq_to_vector(irq)]);
+        if ( test_bit(_HVM_IRQ_DPCI_MSI, &hvm_irq_dpci->mirq[irq].flags) )
+        {
+            hvm_pci_msi_assert(d, irq);
+            continue;
+        }
+
+        stop_timer(&hvm_irq_dpci->hvm_timer[domain_irq_to_vector(d, irq)]);
 
         list_for_each_entry ( digl, &hvm_irq_dpci->mirq[irq].digl_list, list )
         {
@@ -137,7 +149,7 @@ static void svm_dirq_assist(struct vcpu 
          * guest will never deal with the irq, then the physical interrupt line
          * will never be deasserted.
          */
-        set_timer(&hvm_irq_dpci->hvm_timer[irq_to_vector(irq)],
+        set_timer(&hvm_irq_dpci->hvm_timer[domain_irq_to_vector(d, irq)],
                   NOW() + PT_IRQ_TIME_OUT);
     }
 }

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