summaryrefslogtreecommitdiff
path: root/drivers/s390/char/sclp_early.c
diff options
context:
space:
mode:
authorGuenther Hutzl <hutzl@linux.vnet.ibm.com>2014-12-01 17:24:42 +0100
committerChristian Borntraeger <borntraeger@de.ibm.com>2015-12-15 17:08:22 +0100
commit32e6b236d26946eb076d1450bfb8f9978f15d6b9 (patch)
tree302cf6c0d088f3fe93fad850e159b7da97c486fb /drivers/s390/char/sclp_early.c
parenta3a92c31bf0b57ad0ca7f092a6f3a57168ba9ae2 (diff)
KVM: s390: consider system MHA for guest storage
Verify that the guest maximum storage address is below the MHA (maximum host address) value allowed on the host. Acked-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Guenther Hutzl <hutzl@linux.vnet.ibm.com> Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com> [adopt to match recent limit,size changes] Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'drivers/s390/char/sclp_early.c')
-rw-r--r--drivers/s390/char/sclp_early.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/s390/char/sclp_early.c b/drivers/s390/char/sclp_early.c
index e0a1f4eec370..6804354c42bd 100644
--- a/drivers/s390/char/sclp_early.c
+++ b/drivers/s390/char/sclp_early.c
@@ -40,7 +40,8 @@ struct read_info_sccb {
u8 fac85; /* 85 */
u8 _pad_86[91 - 86]; /* 86-90 */
u8 flags; /* 91 */
- u8 _pad_92[100 - 92]; /* 92-99 */
+ u8 _pad_92[99 - 92]; /* 92-98 */
+ u8 hamaxpow; /* 99 */
u32 rnsize2; /* 100-103 */
u64 rnmax2; /* 104-111 */
u8 _pad_112[116 - 112]; /* 112-115 */
@@ -120,6 +121,11 @@ static void __init sclp_facilities_detect(struct read_info_sccb *sccb)
sclp.rzm <<= 20;
sclp.ibc = sccb->ibc;
+ if (sccb->hamaxpow && sccb->hamaxpow < 64)
+ sclp.hamax = (1UL << sccb->hamaxpow) - 1;
+ else
+ sclp.hamax = U64_MAX;
+
if (!sccb->hcpua) {
if (MACHINE_IS_VM)
sclp.max_cores = 64;