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[S390] kvm: extension capability for new address space layout 

598841ca99 ([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>
This commit is contained in:
Christian Borntraeger 2011-09-20 17:07:29 +02:00 committed by Heiko Carstens
parent 480e5926ce
commit b6cf8788a3
2 changed files with 2 additions and 0 deletions
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1
arch/s390/kvm/kvm-s390.c
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@ -123,6 +123,7 @@ int kvm_dev_ioctl_check_extension(long ext)
switch (ext) { switch (ext) {
case KVM_CAP_S390_PSW: case KVM_CAP_S390_PSW:
case KVM_CAP_S390_GMAP:
r = 1; r = 1;
break; break;
default: default:

1
include/linux/kvm.h
View File

@ -553,6 +553,7 @@ struct kvm_ppc_pvinfo {
#define KVM_CAP_SPAPR_TCE 63 #define KVM_CAP_SPAPR_TCE 63
#define KVM_CAP_PPC_SMT 64 #define KVM_CAP_PPC_SMT 64
#define KVM_CAP_PPC_RMA 65 #define KVM_CAP_PPC_RMA 65
#define KVM_CAP_S390_GMAP 71
#ifdef KVM_CAP_IRQ_ROUTING #ifdef KVM_CAP_IRQ_ROUTING