[PATCH V2] xen/arm: dm: Drop XEN_DMOP_get_ioreq_server_info from supported

[Oleksandr Tyshchenko <Oleksandr_Tyshchenko@xxxxxxxx>]

The said sub-op is not supported on Arm, since it:
 - does not support the buffered emulation (so bufioreq_port/bufioreq_gfn
   cannot be returned), please refer to ioreq_server_create()
 - does not support "legacy" mechanism of mapping IOREQ Server
   magic pages (so ioreq_gfn/bufioreq_gfn cannot be returned), please
   refer to arch_ioreq_server_map_pages(). On Arm, only the Acquire
   Resource infrastructure is used to query and map the IOREQ Server pages.

Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>
---
  V2:
   - s/Arm64/Arm
   - drop from dm_op() in xen/arch/arm/dm.c
   - update commit subject
---
---
 xen/arch/arm/dm.c             | 1 -
 xen/include/public/arch-arm.h | 1 -
 2 files changed, 2 deletions(-)

diff --git a/xen/arch/arm/dm.c b/xen/arch/arm/dm.c
index fdb3d967ec..67d2c950e5 100644
--- a/xen/arch/arm/dm.c
+++ b/xen/arch/arm/dm.c
@@ -21,7 +21,6 @@ int dm_op(const struct dmop_args *op_args)
 
     static const uint8_t op_size[] = {
         [XEN_DMOP_create_ioreq_server]              = sizeof(struct 
xen_dm_op_create_ioreq_server),
-        [XEN_DMOP_get_ioreq_server_info]            = sizeof(struct 
xen_dm_op_get_ioreq_server_info),
         [XEN_DMOP_map_io_range_to_ioreq_server]     = sizeof(struct 
xen_dm_op_ioreq_server_range),
         [XEN_DMOP_unmap_io_range_from_ioreq_server] = sizeof(struct 
xen_dm_op_ioreq_server_range),
         [XEN_DMOP_set_ioreq_server_state]           = sizeof(struct 
xen_dm_op_set_ioreq_server_state),
diff --git a/xen/include/public/arch-arm.h b/xen/include/public/arch-arm.h
index e2412a1747..023cc2f468 100644
--- a/xen/include/public/arch-arm.h
+++ b/xen/include/public/arch-arm.h
@@ -130,7 +130,6 @@
  *  HYPERVISOR_dm_op
  *   Exactly these sub-operations are supported:
  *    * XEN_DMOP_create_ioreq_server
- *    * XEN_DMOP_get_ioreq_server_info
  *    * XEN_DMOP_map_io_range_to_ioreq_server
  *    * XEN_DMOP_unmap_io_range_from_ioreq_server
  *    * XEN_DMOP_set_ioreq_server_state
-- 
2.34.1