motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-03 15:53:54 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

s390x/css: Refactor IRB construction

Browse source 
Currently, all subchannel types have "sense data" copied into
the IRB.ECW space, and a couple flags enabled in the IRB.SCSW
and IRB.ESW. But for passthrough (vfio-ccw) subchannels,
this data isn't populated in the first place, so enabling
those flags leads to unexpected behavior if the guest tries to
process the sense data (zeros) in the IRB.ECW.

Let's add a subchannel callback that builds these portions of
the IRB, and move the existing code into a routine for those
virtual subchannels. The passthrough subchannels will be able
to piggy-back onto this later.

Signed-off-by: Eric Farman <farman@linux.ibm.com>
Message-Id: <20210617232537.1337506-4-farman@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
This commit is contained in:
Eric Farman 2021-06-18 01:25:36 +02:00 • committed by Cornelia Huck
parent 1b01dedaed
commit 0599a046ac
4 changed files with 33 additions and 16 deletions
Download patch file Download diff file Expand all files Collapse all files

2
include/hw/s390x/css.h
View file

@ -138,6 +138,7 @@ struct SubchDev {
int (*ccw_cb) (SubchDev *, CCW1);
void (*disable_cb)(SubchDev *);
IOInstEnding (*do_subchannel_work) (SubchDev *);
void (*irb_cb)(SubchDev *, IRB *);
SenseId id;
void *driver_data;
};
@ -215,6 +216,7 @@ void css_clear_sei_pending(void);
IOInstEnding s390_ccw_cmd_request(SubchDev *sch);
IOInstEnding do_subchannel_work_virtual(SubchDev *sub);
IOInstEnding do_subchannel_work_passthrough(SubchDev *sub);
void build_irb_virtual(SubchDev *sch, IRB *irb);
int s390_ccw_halt(SubchDev *sch);
int s390_ccw_clear(SubchDev *sch);