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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2016-07-26 16:53:09 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2017-07-25 06:55:30 +0200
commit118bd31bea2cdb7f1dbf22dd9a58e818b5313156 (patch)
tree9cf58dc2b2841369698dcca4483f4244b5e58d3b /drivers/s390/char
parentc9b5ad546e7d486465a3dd8c89245ac3707a4384 (diff)
s390/mm: add no-dat TLB flush optimization
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/char')
-rw-r--r--drivers/s390/char/sclp_early.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/s390/char/sclp_early.c b/drivers/s390/char/sclp_early.c
index efd84d1d178b..bc1fc00910b0 100644
--- a/drivers/s390/char/sclp_early.c
+++ b/drivers/s390/char/sclp_early.c
@@ -39,7 +39,7 @@ struct read_info_sccb {
u8 fac84; /* 84 */
u8 fac85; /* 85 */
u8 _pad_86[91 - 86]; /* 86-90 */
- u8 flags; /* 91 */
+ u8 fac91; /* 91 */
u8 _pad_92[98 - 92]; /* 92-97 */
u8 fac98; /* 98 */
u8 hamaxpow; /* 99 */
@@ -103,6 +103,8 @@ static void __init sclp_early_facilities_detect(struct read_info_sccb *sccb)
sclp.has_kss = !!(sccb->fac98 & 0x01);
if (sccb->fac85 & 0x02)
S390_lowcore.machine_flags |= MACHINE_FLAG_ESOP;
+ if (sccb->fac91 & 0x40)
+ S390_lowcore.machine_flags |= MACHINE_FLAG_TLB_GUEST;
sclp.rnmax = sccb->rnmax ? sccb->rnmax : sccb->rnmax2;
sclp.rzm = sccb->rnsize ? sccb->rnsize : sccb->rnsize2;
sclp.rzm <<= 20;
@@ -139,7 +141,7 @@ static void __init sclp_early_facilities_detect(struct read_info_sccb *sccb)
/* Save IPL information */
sclp_ipl_info.is_valid = 1;
- if (sccb->flags & 0x2)
+ if (sccb->fac91 & 0x2)
sclp_ipl_info.has_dump = 1;
memcpy(&sclp_ipl_info.loadparm, &sccb->loadparm, LOADPARM_LEN);