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-rw-r--r--include/hw/s390x/css.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/hw/s390x/css.h b/include/hw/s390x/css.h
index f1f0d7f07a..e61fa74d9b 100644
--- a/include/hw/s390x/css.h
+++ b/include/hw/s390x/css.h
@@ -28,6 +28,7 @@
#define MAX_CIWS 62
#define VIRTUAL_CSSID 0xfe
+#define VIRTIO_CCW_CHPID 0 /* used by convention */
typedef struct CIW {
uint8_t type;
@@ -115,6 +116,7 @@ bool css_devno_used(uint8_t cssid, uint8_t ssid, uint16_t devno);
void css_subch_assign(uint8_t cssid, uint8_t ssid, uint16_t schid,
uint16_t devno, SubchDev *sch);
void css_sch_build_virtual_schib(SubchDev *sch, uint8_t chpid, uint8_t type);
+unsigned int css_find_free_chpid(uint8_t cssid);
uint16_t css_build_subchannel_id(SubchDev *sch);
void css_reset(void);
void css_reset_sch(SubchDev *sch);