> -----Original Message-----
> From: Jason Andryuk [mailto:jandr...@gmail.com]
> Sent: 11 March 2019 18:02
> To: qemu-de...@nongnu.org
> Cc: xen-devel@lists.xenproject.org; marma...@invisiblethingslab.com; Jason
> Andryuk
> <jandr...@gmail.com>; Stefano Stabellini <sstabell...@kernel.org>; Anthony
> Perard
> <anthony.per...@citrix.com>; Paul Durrant <paul.durr...@citrix.com>; Paolo
> Bonzini
> <pbonz...@redhat.com>; Richard Henderson <r...@twiddle.net>; Eduardo Habkost
> <ehabk...@redhat.com>;
> Michael S. Tsirkin <m...@redhat.com>; Marcel Apfelbaum
> <marcel.apfelb...@gmail.com>
> Subject: [PATCH 3/6] xen: Skip backend initialization for stubdom
>
> When QEMU is running in a stubdom, it does not provide any
> Paravirtualized backends. Those still run in dom0 or another driver
> domain. Therefore we skip backend initialization (xen_bus_init and
> xen_be_init) for the stubdom case.
>
> Original patch by Anthony PERARD <anthony.per...@citrix.com>
>
> Signed-off-by: Jason Andryuk <jandr...@gmail.com>
Reviewed-by: Paul Durrant <paul.durr...@citrix.com>
> ---
> hw/i386/xen/xen-hvm.c | 16 +++++++++-------
> 1 file changed, 9 insertions(+), 7 deletions(-)
>
> diff --git a/hw/i386/xen/xen-hvm.c b/hw/i386/xen/xen-hvm.c
> index c20c4b27f6..4b62f070cb 100644
> --- a/hw/i386/xen/xen-hvm.c
> +++ b/hw/i386/xen/xen-hvm.c
> @@ -1485,8 +1485,6 @@ void xen_hvm_init(PCMachineState *pcms, MemoryRegion
> **ram_memory)
> QLIST_INIT(&state->dev_list);
> device_listener_register(&state->device_listener);
>
> - xen_bus_init();
> -
> xenstore = xs_open(0);
> if (!xenstore) {
> error_report("Can't connect to xenstored");
> @@ -1495,12 +1493,16 @@ void xen_hvm_init(PCMachineState *pcms, MemoryRegion
> **ram_memory)
>
> qemu_set_fd_handler(xs_fileno(xenstore), xenstore_update, NULL, NULL);
>
> - /* Initialize backend core & drivers */
> - if (xen_be_init() != 0) {
> - error_report("xen backend core setup failed");
> - goto err;
> + if (!xen_stubdom_enabled()) {
> + xen_bus_init();
> +
> + /* Initialize backend core & drivers */
> + if (xen_be_init() != 0) {
> + error_report("xen backend core setup failed");
> + goto err;
> + }
> + xen_be_register_common();
> }
> - xen_be_register_common();
>
> QLIST_INIT(&xen_physmap);
> xen_read_physmap(state);
> --
> 2.20.1
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-devel
