From: Maciej S. Szmigiero <maciej.szmigiero@oracle.com>
Date: Tue, 4 Mar 2025 22:03:50 +0000 (+0100)
Subject: vfio/migration: Multifd device state transfer - add support checking function
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=2efa35d34edfeca0d151de8283e52006e2c6cbd4;p=qemu.git

vfio/migration: Multifd device state transfer - add support checking function

Add vfio_multifd_transfer_supported() function that tells whether the
multifd device state transfer is supported.

Reviewed-by: Cédric Le Goater <clg@redhat.com>
Signed-off-by: Maciej S. Szmigiero <maciej.szmigiero@oracle.com>
Link: https://lore.kernel.org/qemu-devel/8ce50256f341b3d47342bb217cb5fbb2deb14639.1741124640.git.maciej.szmigiero@oracle.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---

diff --git a/hw/vfio/migration-multifd.c b/hw/vfio/migration-multifd.c
index fa594b33fd..79fae0b629 100644
--- a/hw/vfio/migration-multifd.c
+++ b/hw/vfio/migration-multifd.c
@@ -31,3 +31,9 @@ typedef struct VFIODeviceStatePacket {
     uint32_t flags;
     uint8_t data[0];
 } QEMU_PACKED VFIODeviceStatePacket;
+
+bool vfio_multifd_transfer_supported(void)
+{
+    return multifd_device_state_supported() &&
+        migrate_send_switchover_start();
+}
diff --git a/hw/vfio/migration-multifd.h b/hw/vfio/migration-multifd.h
index 5b221c6e16..1b60d5f67a 100644
--- a/hw/vfio/migration-multifd.h
+++ b/hw/vfio/migration-multifd.h
@@ -14,4 +14,6 @@
 
 #include "hw/vfio/vfio-common.h"
 
+bool vfio_multifd_transfer_supported(void);
+
 #endif