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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
include/hw/s390x/css.h
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@ -218,6 +218,7 @@ IOInstEnding do_subchannel_work_passthrough(SubchDev *sub);
int s390_ccw_halt(SubchDev *sch);
int s390_ccw_clear(SubchDev *sch);
IOInstEnding s390_ccw_store(SubchDev *sch);
typedef enum {
CSS_IO_ADAPTER_VIRTIO = 0,
@ -242,7 +243,7 @@ SubchDev *css_find_subch(uint8_t m, uint8_t cssid, uint8_t ssid,
uint16_t schid);
bool css_subch_visible(SubchDev *sch);
void css_conditional_io_interrupt(SubchDev *sch);
int css_do_stsch(SubchDev *sch, SCHIB *schib);
IOInstEnding css_do_stsch(SubchDev *sch, SCHIB *schib);
bool css_schid_final(int m, uint8_t cssid, uint8_t ssid, uint16_t schid);
IOInstEnding css_do_msch(SubchDev *sch, const SCHIB *schib);
IOInstEnding css_do_xsch(SubchDev *sch);