[Xen-devel] [PATCH] hvm: passthrough MSI-X: fix ia64 link and MSI-X clean up

[Isaku Yamahata <yamahata@xxxxxxxxxxxxx>]

hvm: passthrough MSI-X: fix ia64 link and MSI-X clean up

This patch fixes the ia64 link error and some clean up of MSI-X code.
- add ia64 dummy function to link
- fix unmatched prototype
- add error check

Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>

diff --git a/xen/arch/ia64/vmx/vmx_interrupt.c 
b/xen/arch/ia64/vmx/vmx_interrupt.c
--- a/xen/arch/ia64/vmx/vmx_interrupt.c
+++ b/xen/arch/ia64/vmx/vmx_interrupt.c
@@ -154,3 +154,14 @@ void hvm_isa_irq_deassert(struct domain 
 {
     /* dummy */
 }
+
+int msixtbl_pt_register(struct domain *d, int pirq, uint64_t gtable)
+{
+    /* dummy */
+    return -ENOSYS;
+}
+
+void msixtbl_pt_unregister(struct domain *d, int pirq)
+{
+    /* dummy */
+}
diff --git a/xen/drivers/passthrough/io.c b/xen/drivers/passthrough/io.c
--- a/xen/drivers/passthrough/io.c
+++ b/xen/drivers/passthrough/io.c
@@ -58,9 +58,6 @@ static void pt_irq_time_out(void *data)
     pirq_guest_eoi(irq_map->dom, machine_gsi);
 }
 
-extern int msixtbl_pt_register(struct domain *d, int pirq, uint64_t gtable);
-extern int msixtbl_pt_unregister(struct domain *d, int pirq);
-
 int pt_irq_create_bind_vtd(
     struct domain *d, xen_domctl_bind_pt_irq_t *pt_irq_bind)
 {
@@ -108,6 +105,12 @@ int pt_irq_create_bind_vtd(
             hvm_irq_dpci->msi_gvec_pirq[pt_irq_bind->u.msi.gvec] = pirq;
             /* bind after hvm_irq_dpci is setup to avoid race with irq 
handler*/
             rc = pirq_guest_bind(d->vcpu[0], pirq, 0);
+            if ( rc == 0 && pt_irq_bind->u.msi.gtable )
+            {
+                rc = msixtbl_pt_register(d, pirq, pt_irq_bind->u.msi.gtable);
+                if ( unlikely(rc) )
+                    pirq_guest_unbind(d, pirq);
+            }
             if ( unlikely(rc) )
             {
                 hvm_irq_dpci->msi_gvec_pirq[pt_irq_bind->u.msi.gvec] = 0;
@@ -118,8 +121,6 @@ int pt_irq_create_bind_vtd(
                 spin_unlock(&d->event_lock);
                 return rc;
             }
-            if ( pt_irq_bind->u.msi.gtable )
-                msixtbl_pt_register(d, pirq, pt_irq_bind->u.msi.gtable);
         }
         else if (hvm_irq_dpci->mirq[pirq].gmsi.gvec != pt_irq_bind->u.msi.gvec
                 ||hvm_irq_dpci->msi_gvec_pirq[pt_irq_bind->u.msi.gvec] != pirq)
diff --git a/xen/include/xen/pci.h b/xen/include/xen/pci.h
--- a/xen/include/xen/pci.h
+++ b/xen/include/xen/pci.h
@@ -85,4 +85,7 @@ void pci_conf_write32(
 int pci_find_cap_offset(u8 bus, u8 dev, u8 func, u8 cap);
 int pci_find_next_cap(u8 bus, unsigned int devfn, u8 pos, int cap);
 
+int msixtbl_pt_register(struct domain *d, int pirq, uint64_t gtable);
+void msixtbl_pt_unregister(struct domain *d, int pirq);
+
 #endif /* __XEN_PCI_H__ */


-- 
yamahata

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