[xen staging] iommu: move iommu_update_ire_from_msi() to xen/iommu.h

[patchbot@xxxxxxx]

commit 705f7b55be551b9d39b5ab52689a330d73f9c8eb
Author:     Rahul Singh <rahul.singh@xxxxxxx>
AuthorDate: Mon May 3 15:30:57 2021 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Mon May 3 15:30:57 2021 +0200

    iommu: move iommu_update_ire_from_msi() to xen/iommu.h
    
    Move iommu_update_ire_from_msi(..) from passthrough/pci.c to
    xen/iommu.h and wrap it under CONFIG_X86 as it is referenced in x86
    code only to avoid compilation error for other architecture when
    HAS_PCI is enabled.
    
    No functional change intended.
    
    Signed-off-by: Rahul Singh <rahul.singh@xxxxxxx>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 xen/drivers/passthrough/pci.c |  7 -------
 xen/include/xen/iommu.h       | 13 ++++++++++---
 2 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/xen/drivers/passthrough/pci.c b/xen/drivers/passthrough/pci.c
index 705137f8be..199ce08612 100644
--- a/xen/drivers/passthrough/pci.c
+++ b/xen/drivers/passthrough/pci.c
@@ -1303,13 +1303,6 @@ static int __init setup_dump_pcidevs(void)
 }
 __initcall(setup_dump_pcidevs);
 
-int iommu_update_ire_from_msi(
-    struct msi_desc *msi_desc, struct msi_msg *msg)
-{
-    return iommu_intremap
-           ? iommu_call(&iommu_ops, update_ire_from_msi, msi_desc, msg) : 0;
-}
-
 static int iommu_add_device(struct pci_dev *pdev)
 {
     const struct domain_iommu *hd;
diff --git a/xen/include/xen/iommu.h b/xen/include/xen/iommu.h
index 4f0e5ac622..460755df29 100644
--- a/xen/include/xen/iommu.h
+++ b/xen/include/xen/iommu.h
@@ -187,8 +187,6 @@ void free_hvm_irq_dpci(struct hvm_irq_dpci *dpci);
 struct msi_desc;
 struct msi_msg;
 
-int iommu_update_ire_from_msi(struct msi_desc *msi_desc, struct msi_msg *msg);
-
 #define PT_IRQ_TIME_OUT MILLISECS(8)
 #endif /* HAS_PCI */
 
@@ -238,7 +236,6 @@ struct iommu_ops {
                            u8 devfn, device_t *dev);
 #ifdef CONFIG_HAS_PCI
     int (*get_device_group_id)(u16 seg, u8 bus, u8 devfn);
-    int (*update_ire_from_msi)(struct msi_desc *msi_desc, struct msi_msg *msg);
 #endif /* HAS_PCI */
 
     void (*teardown)(struct domain *d);
@@ -267,6 +264,7 @@ struct iommu_ops {
     int (*adjust_irq_affinities)(void);
     void (*sync_cache)(const void *addr, unsigned int size);
     void (*clear_root_pgtable)(struct domain *d);
+    int (*update_ire_from_msi)(struct msi_desc *msi_desc, struct msi_msg *msg);
 #endif /* CONFIG_X86 */
 
     int __must_check (*suspend)(void);
@@ -374,6 +372,15 @@ extern struct page_list_head iommu_pt_cleanup_list;
 
 bool arch_iommu_use_permitted(const struct domain *d);
 
+#ifdef CONFIG_X86
+static inline int iommu_update_ire_from_msi(
+    struct msi_desc *msi_desc, struct msi_msg *msg)
+{
+    return iommu_intremap
+           ? iommu_call(&iommu_ops, update_ire_from_msi, msi_desc, msg) : 0;
+}
+#endif
+
 #endif /* _IOMMU_H_ */
 
 /*
--
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