Fwd: [PATCH] kvm-s390: Fix kvm on IBM System z10

Fwd: [PATCH] kvm-s390: Fix kvm on IBM System z10

[Christian Borntraeger]

I forgot to CC the list, here it is.

----------  Weitergeleitete Nachricht  ----------

Betreff: [PATCH] kvm-s390: Fix kvm on IBM System z10
Datum: Dienstag, 29. Juli 2008
Von: Christian Borntraeger <borntraeger@de.ibm.com>
An: Avi Kivity <avi@qumranet.com>

From: Christian Borntraeger <borntraeger@de.ibm.com>

The z10 system supports large pages, kvm-s390 doesnt.
Make sure that we dont advertise large pages to avoid the guest crashing as 
soon as the guest kernel activates DAT.

Avi, this should go into 2.6.27-rc*.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
---
 arch/s390/kvm/priv.c |    1 +
 1 file changed, 1 insertion(+)

Index: kvm/arch/s390/kvm/priv.c
===================================================================
--- kvm.orig/arch/s390/kvm/priv.c
+++ kvm/arch/s390/kvm/priv.c
@@ -158,6 +158,7 @@ static int handle_stfl(struct kvm_vcpu *
 
 	vcpu->stat.instruction_stfl++;
 	facility_list &= ~(1UL<<24); /* no stfle */
+	facility_list &= ~(1UL<<23); /* no large pages */
 
 	rc = copy_to_guest(vcpu, offsetof(struct _lowcore, stfl_fac_list),
 			   &facility_list, sizeof(facility_list));

-------------------------------------------------------