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Subject: [PATCH 2/3] 2.3.3 virtio-ccw: Add secondary indicators.
Ported from draft commit e945661b40bcfd29efc35dfa73465bcc960bd20b. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> --- virtio-v1.0-wd01-part1-specification.txt | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/virtio-v1.0-wd01-part1-specification.txt b/virtio-v1.0-wd01-part1-specification.txt index f7543a1..108509c 100644 --- a/virtio-v1.0-wd01-part1-specification.txt +++ b/virtio-v1.0-wd01-part1-specification.txt @@ -1105,6 +1105,7 @@ 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 @@ -1202,6 +1203,11 @@ 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 ------------------------- @@ -1213,6 +1219,10 @@ 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 ----------------------------------- -- 1.7.9.5
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