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authorEugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>2014-10-09 16:04:48 +0200
committerChristian Borntraeger <borntraeger@de.ibm.com>2015-11-30 12:47:06 +0100
commitf7ba1d34263e333e82aa8879028ddd06d6d5f9ac (patch)
tree1426039d66d153ba8d63b23e0f2099764695c9fa /drivers/s390/char
parent71f116bfedfdd6763f2caf842bf40a6506759029 (diff)
s390/sclp: introduce checks for ESCA and HVS
Introduce sclp.has_hvs and sclp.has_esca to provide a way for kvm to check whether the extended-SCA and the home-virtual-SCA facilities are available. Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com> Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'drivers/s390/char')
-rw-r--r--drivers/s390/char/sclp_early.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/s390/char/sclp_early.c b/drivers/s390/char/sclp_early.c
index 7bc6df3100ef..ff1e1bb8144d 100644
--- a/drivers/s390/char/sclp_early.c
+++ b/drivers/s390/char/sclp_early.c
@@ -43,7 +43,10 @@ struct read_info_sccb {
u8 _pad_92[100 - 92]; /* 92-99 */
u32 rnsize2; /* 100-103 */
u64 rnmax2; /* 104-111 */
- u8 _pad_112[120 - 112]; /* 112-119 */
+ u8 _pad_112[116 - 112]; /* 112-115 */
+ u8 fac116; /* 116 */
+ u8 _pad_117[119 - 117]; /* 117-118 */
+ u8 fac119; /* 119 */
u16 hcpua; /* 120-121 */
u8 _pad_122[4096 - 122]; /* 122-4095 */
} __packed __aligned(PAGE_SIZE);
@@ -108,6 +111,8 @@ static void __init sclp_facilities_detect(struct read_info_sccb *sccb)
sclp.facilities = sccb->facilities;
sclp.has_sprp = !!(sccb->fac84 & 0x02);
sclp.has_core_type = !!(sccb->fac84 & 0x01);
+ sclp.has_esca = !!(sccb->fac116 & 0x08);
+ sclp.has_hvs = !!(sccb->fac119 & 0x80);
if (sccb->fac85 & 0x02)
S390_lowcore.machine_flags |= MACHINE_FLAG_ESOP;
sclp.rnmax = sccb->rnmax ? sccb->rnmax : sccb->rnmax2;