amd/iommu: clean up unused guest iommu related functions

Delete unused functions from 'iommu_guest.c'.

No functional change.

Signed-off-by: Nicola Vetrini <nicola.vetrini@bugseng.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Acked-by: Jan Beulich <jbeulich@suse.com>

xen/drivers/passthrough/amd/iommu.h

@@ -346,12 +346,7 @@ void cf_check amd_iommu_crash_shutdown(void);
 
 /* guest iommu support */
 #ifdef CONFIG_HVM
-void amd_iommu_send_guest_cmd(struct amd_iommu *iommu, u32 cmd[]);
-void guest_iommu_add_ppr_log(struct domain *d, u32 entry[]);
-void guest_iommu_add_event_log(struct domain *d, u32 entry[]);
-int guest_iommu_init(struct domain* d);
-void guest_iommu_destroy(struct domain *d);
-int guest_iommu_set_base(struct domain *d, uint64_t base);
+void guest_iommu_add_ppr_log(struct domain *d, uint32_t entry[]);
 #else
 static inline void guest_iommu_add_ppr_log(struct domain *d, uint32_t entry[]) {}
 #endif

xen/drivers/passthrough/amd/iommu_cmd.c

@@ -389,10 +389,3 @@ void amd_iommu_flush_all_caches(struct amd_iommu *iommu)
     invalidate_iommu_all(iommu);
     flush_command_buffer(iommu, 0);
 }
-
-void amd_iommu_send_guest_cmd(struct amd_iommu *iommu, u32 cmd[])
-{
-    send_iommu_command(iommu, cmd);
-    /* TBD: Timeout selection may require peeking into cmd[]. */
-    flush_command_buffer(iommu, 0);
-}