s390/sclp: Diag204 busy indication facility detection

Detect diag204 busy indication facility.
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Reviewed-by: Tobias Huschle <huschle@linux.ibm.com>
Signed-off-by: Mete Durlu <meted@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

arch/s390/include/asm/sclp.h

@@ -84,6 +84,7 @@ struct sclp_info {
 	unsigned char has_ibs : 1;
 	unsigned char has_skey : 1;
 	unsigned char has_kss : 1;
+	unsigned char has_diag204_bif : 1;
 	unsigned char has_gisaf : 1;
 	unsigned char has_diag318 : 1;
 	unsigned char has_diag320 : 1;

drivers/s390/char/sclp_early.c

@@ -53,6 +53,7 @@ static void __init sclp_early_facilities_detect(void)
 		get_lowcore()->machine_flags |= MACHINE_FLAG_ESOP;
 	if (sccb->fac91 & 0x40)
 		get_lowcore()->machine_flags |= MACHINE_FLAG_TLB_GUEST;
+	sclp.has_diag204_bif = !!(sccb->fac98 & 0x80);
 	if (sccb->cpuoff > 134) {
 		sclp.has_diag318 = !!(sccb->byte_134 & 0x80);
 		sclp.has_diag320 = !!(sccb->byte_134 & 0x04);