diff options
| author | Martin Schwidefsky | 2016-07-26 16:53:09 +0200 |
|---|---|---|
| committer | Martin Schwidefsky | 2017-07-25 06:55:30 +0200 |
| commit | 118bd31bea2cdb7f1dbf22dd9a58e818b5313156 (patch) | |
| tree | 9cf58dc2b2841369698dcca4483f4244b5e58d3b /drivers/s390/char | |
| parent | c9b5ad546e7d486465a3dd8c89245ac3707a4384 (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.c | 6 |
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); |