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authorAlexander Graf <agraf@suse.de>2009-12-05 12:44:27 +0100
committerAurelien Jarno <aurelien@aurel32.net>2009-12-05 17:36:05 +0100
commitf3304eea9338b7e694843fa1a6db5540e8783d1d (patch)
tree0b4d923345212557b24dd75cc342c8ca0ad5c590 /hw/s390-virtio-bus.h
parent10c339a07d42fcccbccd3f8a5e9c94ccb51fe3e4 (diff)
Add S390x virtio machine bus
On S390x we don't want to go through the hassle of emulating real existing hardware, because we don't need to for running Linux. So let's instead implement a machine that is 100% based on VirtIO which we fortunately implement already. This patch implements the bus that is the groundwork for such an S390x virtio machine. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Diffstat (limited to 'hw/s390-virtio-bus.h')
-rw-r--r--hw/s390-virtio-bus.h64
1 files changed, 64 insertions, 0 deletions
diff --git a/hw/s390-virtio-bus.h b/hw/s390-virtio-bus.h
new file mode 100644
index 0000000000..ef3671421a
--- /dev/null
+++ b/hw/s390-virtio-bus.h
@@ -0,0 +1,64 @@
+/*
+ * QEMU S390x VirtIO BUS definitions
+ *
+ * Copyright (c) 2009 Alexander Graf <agraf@suse.de>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define VIRTIO_DEV_OFFS_TYPE 0 /* 8 bits */
+#define VIRTIO_DEV_OFFS_NUM_VQ 1 /* 8 bits */
+#define VIRTIO_DEV_OFFS_FEATURE_LEN 2 /* 8 bits */
+#define VIRTIO_DEV_OFFS_CONFIG_LEN 3 /* 8 bits */
+#define VIRTIO_DEV_OFFS_STATUS 4 /* 8 bits */
+#define VIRTIO_DEV_OFFS_CONFIG 5 /* dynamic */
+
+#define VIRTIO_VQCONFIG_OFFS_TOKEN 0 /* 64 bits */
+#define VIRTIO_VQCONFIG_OFFS_ADDRESS 8 /* 64 bits */
+#define VIRTIO_VQCONFIG_OFFS_NUM 16 /* 16 bits */
+#define VIRTIO_VQCONFIG_LEN 24
+
+#define VIRTIO_RING_LEN (TARGET_PAGE_SIZE * 3)
+#define S390_DEVICE_PAGES 256
+
+typedef struct VirtIOS390Device {
+ DeviceState qdev;
+ ram_addr_t dev_offs;
+ ram_addr_t feat_offs;
+ uint8_t feat_len;
+ VirtIODevice *vdev;
+ DriveInfo *dinfo;
+ NICConf nic;
+} VirtIOS390Device;
+
+typedef struct VirtIOS390Bus {
+ BusState bus;
+
+ VirtIOS390Device *console;
+ ram_addr_t dev_page;
+ ram_addr_t dev_offs;
+ ram_addr_t next_ring;
+} VirtIOS390Bus;
+
+
+extern void s390_virtio_device_update_status(VirtIOS390Device *dev);
+
+extern VirtIOS390Device *s390_virtio_bus_console(VirtIOS390Bus *bus);
+extern VirtIOS390Bus *s390_virtio_bus_init(ram_addr_t *ram_size);
+
+extern VirtIOS390Device *s390_virtio_bus_find_vring(VirtIOS390Bus *bus,
+ ram_addr_t mem,
+ int *vq_num);
+extern VirtIOS390Device *s390_virtio_bus_find_mem(VirtIOS390Bus *bus,
+ ram_addr_t mem);