s390/sclp: Add hmfai field

Let's add hypervisor-managed facility-apportionment indications field to
SCLP structs. KVM will use it to reduce maintenance cost of
Non-Hypervisor-Managed facility bits.

Signed-off-by: Alexander Yarygin <yarygin@linux.vnet.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Reviewed-by: Eric Farman <farman@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>

arch/s390/include/asm/sclp.h

@@ -69,6 +69,7 @@ struct sclp_info {
 	unsigned int max_cores;
 	unsigned long hsa_size;
 	unsigned long facilities;
+	unsigned int hmfai;
 };
 extern struct sclp_info sclp;
 

drivers/s390/char/sclp_early.c

@@ -49,7 +49,9 @@ struct read_info_sccb {
 	u8	_pad_117[119 - 117];	/* 117-118 */
 	u8	fac119;			/* 119 */
 	u16	hcpua;			/* 120-121 */
-	u8	_pad_122[4096 - 122];	/* 122-4095 */
+	u8	_pad_122[124 - 122];	/* 122-123 */
+	u32	hmfai;			/* 124-127 */
+	u8	_pad_128[4096 - 128];	/* 128-4095 */
 } __packed __aligned(PAGE_SIZE);
 
 static char sccb_early[PAGE_SIZE] __aligned(PAGE_SIZE) __initdata;
@@ -155,6 +157,8 @@ static void __init sclp_facilities_detect(struct read_info_sccb *sccb)
 	sclp.mtid = (sccb->fac42 & 0x80) ? (sccb->fac42 & 31) : 0;
 	sclp.mtid_cp = (sccb->fac42 & 0x80) ? (sccb->fac43 & 31) : 0;
 	sclp.mtid_prev = (sccb->fac42 & 0x80) ? (sccb->fac66 & 31) : 0;
+
+	sclp.hmfai = sccb->hmfai;
 }
 
 /*