[GIT,PULL,3/9] KVM: s390: make EDAT1 depend on host support
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Message ID 1431333877-28700-4-git-send-email-borntraeger@de.ibm.com
State New
Headers show

Commit Message

Christian Borntraeger May 11, 2015, 8:44 a.m. UTC
From: Guenther Hutzl <hutzl@linux.vnet.ibm.com>

We should only enable EDAT1 for the guest if the host actually supports
it and the cpu model for the guest has EDAT-1 enabled.

Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Guenther Hutzl <hutzl@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
---
 arch/s390/kvm/kvm-s390.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

Patch
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diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index f5282e6..2da36c4 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -1311,8 +1311,11 @@  int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
 
 	atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH |
 						    CPUSTAT_SM |
-						    CPUSTAT_STOPPED |
-						    CPUSTAT_GED);
+						    CPUSTAT_STOPPED);
+
+	if (test_kvm_facility(vcpu->kvm, 8))
+		atomic_set_mask(CPUSTAT_GED, &vcpu->arch.sie_block->cpuflags);
+
 	kvm_s390_vcpu_setup_model(vcpu);
 
 	vcpu->arch.sie_block->ecb   = 6;