IOMMU: add crash_shutdown iommu_op

The kdump kernel has problems booting with interrupt/dma
remapping enabled, so we need a new iommu_ops called
crash_shutdown which is basically suspend but doesn't
need to bother saving state.

Make sure that crash_shutdown is called on the kexec
path.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/xen/include/xen/iommu.h b/xen/include/xen/iommu.h
index 2dee3f2982..31476c20c1 100644
--- a/xen/include/xen/iommu.h
+++ b/xen/include/xen/iommu.h
@@ -133,6 +133,7 @@ struct iommu_ops {
     void (*suspend)(void);
     void (*resume)(void);
     void (*share_p2m)(struct domain *d);
+    void (*crash_shutdown)(void);
 };
 
 void iommu_update_ire_from_apic(unsigned int apic, unsigned int reg, unsigned int value);
@@ -142,6 +143,7 @@ unsigned int iommu_read_apic_from_ire(unsigned int apic, unsigned int reg);
 
 void iommu_suspend(void);
 void iommu_resume(void);
+void iommu_crash_shutdown(void);
 
 void iommu_set_dom0_mapping(struct domain *d);
 void iommu_share_p2m_table(struct domain *d);