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-rw-r--r--virtio-v1.0-wd01-part1-specification.txt10
1 files changed, 10 insertions, 0 deletions
diff --git a/virtio-v1.0-wd01-part1-specification.txt b/virtio-v1.0-wd01-part1-specification.txt
index 21928ec..73bef98 100644
--- a/virtio-v1.0-wd01-part1-specification.txt
+++ b/virtio-v1.0-wd01-part1-specification.txt
@@ -1165,6 +1165,7 @@ virtio:
#define CCW_CMD_SET_VQ 0x13
#define CCW_CMD_VDEV_RESET 0x33
#define CCW_CMD_SET_IND 0x43
+#define CCW_CMD_SET_CONF_IND 0x53
#define CCW_CMD_READ_FEAT 0x12
#define CCW_CMD_WRITE_FEAT 0x11
#define CCW_CMD_READ_CONF 0x22
@@ -1262,6 +1263,11 @@ To communicate the location of the indicator bits for host->guest
notification, the guest uses the CCW_CMD_SET_IND command which
sends the guest address of the indicators in a 64 bit value.
+For the indicator bits used in the configuration change
+host->guest notification, the CCW_CMD_SET_CONF_IND command is
+used analogously.
+
+
2.3.3.3. Device Operation
-------------------------
@@ -1273,6 +1279,10 @@ corresponding bit in the guest-provided indicators. If an
interrupt is not already pending for the subchannel, the host
generates an unsolicited I/O interrupt.
+If the host wants to notify the guest about configuration
+changes, it sets bit 0 in the configuration indicators and
+generates an unsolicited I/O interrupt, if needed.
+
2.3.3.3.2. Guest->Host Notification
-----------------------------------