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From: Gerd Hoffmann <kraxel@redhat.com>
To: qemu-devel@nongnu.org
Cc: Thomas Huth <thuth@redhat.com>,
	David Hildenbrand <david@redhat.com>,
	Cornelia Huck <cohuck@redhat.com>,
	Richard Henderson <richard.henderson@linaro.org>,
	Halil Pasic <pasic@linux.ibm.com>,
	Christian Borntraeger <borntraeger@de.ibm.com>,
	qemu-s390x@nongnu.org, "Michael S. Tsirkin" <mst@redhat.com>,
	Gerd Hoffmann <kraxel@redhat.com>
Subject: [PATCH 2/3] s390x: add have_virtio_ccw
Date: Wed, 17 Mar 2021 10:56:21 +0100	[thread overview]
Message-ID: <20210317095622.2839895-3-kraxel@redhat.com> (raw)
In-Reply-To: <20210317095622.2839895-1-kraxel@redhat.com>

Introduce a symbol which can be used to prevent ccw modules
being loaded into system emulators without ccw support.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 hw/s390x/virtio-ccw.h | 5 +++++
 hw/s390x/virtio-ccw.c | 2 ++
 2 files changed, 7 insertions(+)

diff --git a/hw/s390x/virtio-ccw.h b/hw/s390x/virtio-ccw.h
index 49a2b8ca42df..0168232e3b8d 100644
--- a/hw/s390x/virtio-ccw.h
+++ b/hw/s390x/virtio-ccw.h
@@ -63,6 +63,11 @@ typedef struct VirtioBusClass VirtioCcwBusClass;
 DECLARE_OBJ_CHECKERS(VirtioCcwBusState, VirtioCcwBusClass,
                      VIRTIO_CCW_BUS, TYPE_VIRTIO_CCW_BUS)
 
+/*
+ * modules can reference this symbol to avoid being loaded
+ * into system emulators without ccw support
+ */
+extern bool have_virtio_ccw;
 
 struct VirtIOCCWDeviceClass {
     CCWDeviceClass parent_class;
diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c
index 06c06056814b..314ed7b24566 100644
--- a/hw/s390x/virtio-ccw.c
+++ b/hw/s390x/virtio-ccw.c
@@ -35,6 +35,8 @@
 
 #define NR_CLASSIC_INDICATOR_BITS 64
 
+bool have_virtio_ccw = true;
+
 static int virtio_ccw_dev_post_load(void *opaque, int version_id)
 {
     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(opaque);
-- 
2.30.2



  parent reply	other threads:[~2021-03-17  9:59 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-17  9:56 [PATCH 0/3] s390x: modularize virtio-gpu-ccw Gerd Hoffmann
2021-03-17  9:56 ` [PATCH 1/3] s390x: move S390_ADAPTER_SUPPRESSIBLE Gerd Hoffmann
2021-03-17 11:30   ` Philippe Mathieu-Daudé
2021-03-17  9:56 ` Gerd Hoffmann [this message]
2021-03-17  9:56 ` [PATCH 3/3] s390x: modularize virtio-gpu-ccw Gerd Hoffmann
2021-03-22 13:12 ` [PATCH 0/3] " Halil Pasic
2021-03-26  8:40   ` Gerd Hoffmann

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