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vfio-ccw: Add support for the schib region

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The schib region can be used to obtain the latest SCHIB from the host
passthrough subchannel. Since the guest SCHIB is virtualized,
we currently only update the path related information so that the
guest is aware of any path related changes when it issues the
'stsch' instruction.

Signed-off-by: Farhan Ali <alifm@linux.ibm.com>
Signed-off-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <20200505125757.98209-4-farman@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
This commit is contained in:
Farhan Ali 2020-05-05 14:57:54 +02:00 • committed by Cornelia Huck
parent 2a3b9cbaa7
commit 46ea3841ed
6 changed files with 99 additions and 5 deletions
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3
target/s390x/ioinst.c
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@ -292,8 +292,7 @@ void ioinst_handle_stsch(S390CPU *cpu, uint64_t reg1, uint32_t ipb,
sch = css_find_subch(m, cssid, ssid, schid);
if (sch) {
if (css_subch_visible(sch)) {
css_do_stsch(sch, &schib);
cc = 0;
cc = css_do_stsch(sch, &schib);
} else {
/* Indicate no more subchannels in this css/ss */
cc = 3;