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[RFC PATCH v2 10/12] migration: Add start-migrate-incoming QMP command
From: |
Dov Murik |
Subject: |
[RFC PATCH v2 10/12] migration: Add start-migrate-incoming QMP command |
Date: |
Mon, 23 Aug 2021 10:16:34 -0400 |
This command forces a running VM into a migrate-incoming state. When
using guest-assisted migration (for confidential guests), the target
must be started so that its memory has the necessary code for the
migration helper. After it is ready we can start receiving the incoming
migration connection.
Signed-off-by: Dov Murik <dovmurik@linux.ibm.com>
---
qapi/migration.json | 26 ++++++++++++++++++++++++++
migration/migration.c | 17 +++++++++++++++++
2 files changed, 43 insertions(+)
diff --git a/qapi/migration.json b/qapi/migration.json
index baff3c6bf7..da47b8534f 100644
--- a/qapi/migration.json
+++ b/qapi/migration.json
@@ -1516,6 +1516,32 @@
##
{ 'command': 'start-migration-handler' }
+##
+# @start-migrate-incoming:
+#
+# Force start an incoming migration even in a running VM. This is used by the
+# target VM in guest-assisted migration of a confidential guest.
+#
+# @uri: The Uniform Resource Identifier identifying the source or
+# address to listen on
+#
+# Returns: nothing on success
+#
+# Since: 6.0
+#
+# Notes:
+#
+# The uri format is the same as the -incoming command-line option.
+#
+# Example:
+#
+# -> { "execute": "start-migrate-incoming",
+# "arguments": { "uri": "tcp::4446" } }
+# <- { "return": {} }
+#
+##
+{ 'command': 'start-migrate-incoming', 'data': {'uri': 'str' } }
+
##
# @xen-save-devices-state:
#
diff --git a/migration/migration.c b/migration/migration.c
index a9f3a79e4f..0b9ab3decb 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -2173,6 +2173,23 @@ void qmp_start_migration_handler(Error **errp)
}
}
+void qmp_start_migrate_incoming(const char *uri, Error **errp)
+{
+ Error *local_err = NULL;
+
+ if (!yank_register_instance(MIGRATION_YANK_INSTANCE, errp)) {
+ return;
+ }
+
+ vm_stop(RUN_STATE_PAUSED);
+ qemu_start_incoming_migration(uri, &local_err);
+
+ if (local_err) {
+ yank_unregister_instance(MIGRATION_YANK_INSTANCE);
+ error_propagate(errp, local_err);
+ }
+}
+
void qmp_migrate_recover(const char *uri, Error **errp)
{
MigrationIncomingState *mis = migration_incoming_get_current();
--
2.20.1
- [RFC PATCH v2 00/12] Confidential guest-assisted live migration, Dov Murik, 2021/08/23
- [RFC PATCH v2 03/12] migration: Introduce gpa_inside_migration_helper_shared_area, Dov Murik, 2021/08/23
- [RFC PATCH v2 02/12] migration: Add helpers to load confidential RAM, Dov Murik, 2021/08/23
- [RFC PATCH v2 06/12] migration: Skip ROM, non-RAM, and vga.vram memory region during RAM migration, Dov Murik, 2021/08/23
- [RFC PATCH v2 10/12] migration: Add start-migrate-incoming QMP command,
Dov Murik <=
- [RFC PATCH v2 05/12] migration: Load confidential guest RAM using migration helper, Dov Murik, 2021/08/23
- [RFC PATCH v2 09/12] migration: Add QMP command start-migration-handler, Dov Murik, 2021/08/23
- [RFC PATCH v2 07/12] i386/kvm: Exclude mirror vcpu in kvm_synchronize_all_tsc, Dov Murik, 2021/08/23
- [RFC PATCH v2 04/12] migration: Save confidential guest RAM using migration helper, Dov Murik, 2021/08/23
- [RFC PATCH v2 08/12] migration: Allow resetting the mirror vcpu to the MH entry point, Dov Murik, 2021/08/23
- [RFC PATCH v2 01/12] migration: Add helpers to save confidential RAM, Dov Murik, 2021/08/23
- [RFC PATCH v2 12/12] docs: Add confidential guest live migration documentation, Dov Murik, 2021/08/23
- [RFC PATCH v2 11/12] hw/isa/lpc_ich9: Allow updating an already-running VM, Dov Murik, 2021/08/23