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authorHeiko Carstens <heiko.carstens@de.ibm.com>2007-07-10 11:24:10 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2007-07-10 11:24:43 +0200
commit83119ad4a1ceacd99f380086c2855ae2c4268afc (patch)
tree6da1d5cdba6e5bcd8fcdf5332700e8353b4e79a8 /drivers/s390/char/sclp.h
parent05dd25307ca67cbfa0207bbba2e6c79fa97d125b (diff)
[S390] sclp: Test facility list before executing a service call.
Check if a command is available before executing. Saves some superfluous service calls that won't succeed anyway. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/char/sclp.h')
-rw-r--r--drivers/s390/char/sclp.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/s390/char/sclp.h b/drivers/s390/char/sclp.h
index cb5888f79007..c7318a125852 100644
--- a/drivers/s390/char/sclp.h
+++ b/drivers/s390/char/sclp.h
@@ -79,6 +79,11 @@ struct sccb_header {
u16 response_code;
} __attribute__((packed));
+extern u64 sclp_facilities;
+
+#define SCLP_HAS_CHP_INFO (sclp_facilities & 0x8000000000000000ULL)
+#define SCLP_HAS_CHP_RECONFIG (sclp_facilities & 0x2000000000000000ULL)
+
struct gds_subvector {
u8 length;
u8 key;