From: Pierre Morel <pmo...@linux.vnet.ibm.com>
In CCW-0 format TIC command 4 highest bits are ignored in the subchannel.
In CCW-1 format the TIC command 4 highest bits must be 0.
To convert TIC from CCW-0 to CCW-1 we clear the 4 highest bits
to guarantee compatibility.
Signed-off-by: Pierre Morel <pmo...@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.h...@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.h...@de.ibm.com>
---
hw/s390x/css.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/hw/s390x/css.c b/hw/s390x/css.c
index 5df450e..2c0782c 100644
--- a/hw/s390x/css.c
+++ b/hw/s390x/css.c
@@ -261,6 +261,9 @@ static CCW1 copy_ccw_from_guest(hwaddr addr, bool fmt1)
ret.flags = tmp0.flags;
ret.count = be16_to_cpu(tmp0.count);
ret.cda = be16_to_cpu(tmp0.cda1) | (tmp0.cda0 << 16);
+ if ((ret.cmd_code & 0x0f) == CCW_CMD_TIC) {
+ ret.cmd_code &= 0x0f;
+ }
}
return ret;
}
--
2.5.1
