[PATCH v1] hw/i386: disable smbus migration for xenpv

[Olaf Hering]

With commit 7fccf2a06890e3bc3b30e29827ad3fb93fe88fea a new member
smbus_no_migration_support was added, and enabled in two places.
With commit 4ab2f2a8aabfea95cc53c64e13b3f67960b27fdf the vmstate_acpi
got new elements, which are conditionally filled. As a result, an
incoming migration expected smbus related data unless smbus migration
was disabled for a given MachineClass.

Since commit 7fccf2a06890e3bc3b30e29827ad3fb93fe88fea forgot to handle
xenpv, live migration to receiving hosts using qemu-4.0 and later is broken.
Therefore this patch must be applied to stable-4.x as well.

Signed-off-by: Olaf Hering <address@hidden>
---
 hw/i386/pc_piix.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index fa12203079..e19716d0d3 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -952,6 +952,7 @@ static void xenfv_machine_options(MachineClass *m)
     m->desc = "Xen Fully-virtualized PC";
     m->max_cpus = HVM_MAX_VCPUS;
     m->default_machine_opts = "accel=xen";
+    m->smbus_no_migration_support = true;
 }
 
 DEFINE_PC_MACHINE(xenfv, "xenfv", pc_xen_hvm_init,