On 09/20/2011 01:56 PM, Christian Borntraeger wrote:
Avi,Marcelo,
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).
Can you have a look at the change below and give you ACK or NACK?
If ok, I would push this patch to Heiko to be submitted via the
s390 stream for 3.1.
Christian
Signed-off-by: Christian Borntraeger<borntraeger@xxxxxxxxxx>
--- 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:
diff --git a/include/linux/kvm.h b/include/linux/kvm.h
index 2c366b5..b2e9cc1 100644
--- a/include/linux/kvm.h
+++ b/include/linux/kvm.h
@@ -553,6 +553,7 @@ struct kvm_ppc_pvinfo {
#define KVM_CAP_SPAPR_TCE 63
#define KVM_CAP_PPC_SMT 64
#define KVM_CAP_PPC_RMA 65
+#define KVM_CAP_S390_GMAP 66
I would really appreciate if you could take capability number 71. I
already have patches pending (partly already in avi's tree) that occupy
everything up to 70 :)
Alex
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