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authorChristian Borntraeger <borntraeger@de.ibm.com>2011-09-20 17:07:29 +0200
committerHeiko Carstens <heiko.carstens@de.ibm.com>2011-09-20 17:07:34 +0200
commitb6cf8788a3382c2000743a0e393bcc8aeb0601cb (patch)
tree3af86a59e2884f66068019571ce725e81878b5cf /arch
parent480e5926ce3bb61ec229be2dab08bdce8abb8d2e (diff)
downloadlinux-b6cf8788a3382c2000743a0e393bcc8aeb0601cb.tar.gz
[S390] kvm: extension capability for new address space layout
598841ca9919d008b520114d8a4378c4ce4e40a1 ([S390] use gmap address spaces for kvm guest images) changed kvm on s390 to use a separate address space for kvm guests. We can now put KVM guests anywhere in the user address mode with a size up to 8PB - as long as the memory is 1MB-aligned. This change was done without KVM extension capability bit. The change was added after 3.0, but we still have a chance to add a feature bit before 3.1 (keeping the releases in a sane state). We use number 71 to avoid collisions with other pending kvm patches as requested by Alexander Graf. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Avi Kivity <avi@redhat.com> Cc: Alexander Graf <agraf@suse.de> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/s390/kvm/kvm-s390.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index b4eced131e5..dc2b580e27b 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -123,6 +123,7 @@ int kvm_dev_ioctl_check_extension(long ext)
switch (ext) {
case KVM_CAP_S390_PSW:
+ case KVM_CAP_S390_GMAP:
r = 1;
break;
default: