[Xen-devel] [PATCH 01/22] xen: Provide XEN_DMOP_remote_shutdown

[Ian Jackson <ian.jackson@xxxxxxxxxxxxx>]

SCHEDOP_remote_shutdown should be a DMOP so that a deprivileged qemu
can do the propery tidying up.

We should remove SCHEDOP_remote_shutdown at some point.

CC: Jan Beulich <jbeulich@xxxxxxxx>
CC: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CC: George Dunlap <George.Dunlap@xxxxxxxxxxxxx>
CC: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
CC: Stefano Stabellini <sstabellini@xxxxxxxxxx>
CC: Tim Deegan <tim@xxxxxxx>
CC: Wei Liu <wei.liu2@xxxxxxxxxx>
Signed-off-by: Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
---
 xen/arch/x86/hvm/dm.c          |  9 +++++++++
 xen/include/public/hvm/dm_op.h | 12 ++++++++++++
 xen/include/xlat.lst           |  1 +
 3 files changed, 22 insertions(+)

diff --git a/xen/arch/x86/hvm/dm.c b/xen/arch/x86/hvm/dm.c
index 4cf6dee..9eee9fb 100644
--- a/xen/arch/x86/hvm/dm.c
+++ b/xen/arch/x86/hvm/dm.c
@@ -630,6 +630,14 @@ static int dm_op(const struct dmop_args *op_args)
         rc = hvm_inject_msi(d, data->addr, data->data);
         break;
     }
+    case XEN_DMOP_remote_shutdown:
+    {
+        const struct xen_dm_op_remote_shutdown *data =
+            &op.u.remote_shutdown;
+
+        domain_shutdown(d, data->reason);
+        break;
+    }
 
     default:
         rc = -EOPNOTSUPP;
@@ -659,6 +667,7 @@ CHECK_dm_op_modified_memory;
 CHECK_dm_op_set_mem_type;
 CHECK_dm_op_inject_event;
 CHECK_dm_op_inject_msi;
+CHECK_dm_op_remote_shutdown;
 
 int compat_dm_op(domid_t domid,
                  unsigned int nr_bufs,
diff --git a/xen/include/public/hvm/dm_op.h b/xen/include/public/hvm/dm_op.h
index 2a4c3d9..21552b7 100644
--- a/xen/include/public/hvm/dm_op.h
+++ b/xen/include/public/hvm/dm_op.h
@@ -357,6 +357,17 @@ struct xen_dm_op_map_mem_type_to_ioreq_server {
                            has to be set to zero by the caller */
 };
 
+/*
+ * XEN_DMOP_remote_shutdown : Declare a shutdown for another domain
+ *                            Identical to SCHEDOP_remote_shutdown
+ */
+#define XEN_DMOP_remote_shutdown 16
+
+struct xen_dm_op_remote_shutdown {
+    uint32_t reason;       /* SHUTDOWN_* => enum sched_shutdown_reason */
+                           /* (Other reason values are not blocked) */
+};
+
 struct xen_dm_op {
     uint32_t op;
     uint32_t pad;
@@ -377,6 +388,7 @@ struct xen_dm_op {
         struct xen_dm_op_inject_msi inject_msi;
         struct xen_dm_op_map_mem_type_to_ioreq_server
                 map_mem_type_to_ioreq_server;
+        struct xen_dm_op_remote_shutdown remote_shutdown;
     } u;
 };
 
diff --git a/xen/include/xlat.lst b/xen/include/xlat.lst
index 0f17000..20055b4 100644
--- a/xen/include/xlat.lst
+++ b/xen/include/xlat.lst
@@ -70,6 +70,7 @@
 ?      dm_op_set_pci_intx_level        hvm/dm_op.h
 ?      dm_op_set_pci_link_route        hvm/dm_op.h
 ?      dm_op_track_dirty_vram          hvm/dm_op.h
+?      dm_op_remote_shutdown           hvm/dm_op.h
 ?      vcpu_hvm_context                hvm/hvm_vcpu.h
 ?      vcpu_hvm_x86_32                 hvm/hvm_vcpu.h
 ?      vcpu_hvm_x86_64                 hvm/hvm_vcpu.h
-- 
2.1.4


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